EP0154038A1 - Moulding core with adjustable parts - Google Patents

Abstract

There is a molding device for manhole rings or the like. Proposed, in which the hat-shaped mandrel (15) has a core segment (30) from a cover section (31) with an adjoining wall section (32), which horizontally completes the shaping contour of the mandrel (15) and inwards into a release position for the demolding is displaceable. The mold core (15) has an installation device (29) for concreting protruding elements, especially crampons, from the inside into the concrete part to be molded during the molding process. In addition to the core segment (30), the mounting device (29) includes a receptacle (45-48) for each crampon, a clamping device (88-91) assigned to it, and a clamping drive (94) that is common to all of them. The core segment (30) together with these parts can be detached and exchangeably held on the remaining part of the mold core (15) in such a way that it can be coupled to or decoupled from the horizontal translation drive (36, 37). As a result, the core segment (30) can be exchanged for another while maintaining the remaining mold core (15). This significantly reduces the investment costs for individual mold cores.

Description

The invention relates to a shaping device for shaping concrete parts provided with preferably a plurality of protruding elements, in particular climbing elements such as crampons, stirrups or the like. Manhole rings, manhole necks or the like, according to the preamble of claim 1.

A known molding device of this type (DE-PS 31 10 185) has proven itself very well. This applies in particular to the shaping device shown therein in FIG. 9 and described in the associated text, in which the core segment has a plurality of openings for introducing climbing elements from the outside, ie from the molding space, and also a receptacle and a tensioning device associated therewith as well as one of all tensioning devices has common tension drive. The core segment designed in this way is already in the closed position for introducing the risers, for example, the risers being introduced from the outside of the mandrel through the openings in the associated receptacles and then held on the core segment by actuating the common tensioning drive and all tensioning devices. For demoulding a concrete part, in which the same as described during the shaping process

Climbing elements are concreted in, the individual clamping devices are lifted from the respectively assigned receptacle and the climbing element located therein by actuating the tensioning drive. Thereafter, the core segment is moved inward from the closed position, which completes the shaping contour of the mandrel, into the mandrel by horizontal movement by means of the drive device into a release position, as a result of which the climbing elements protruding into the interior of the mandrel are released and the concrete part is subsequently demolded by relative movement between the concrete part and the mandrel can be, without the concrete-climbing elements get stuck anywhere and are torn out. The term climbing elements encompasses all possible forms and configurations of these, which have the function of kicks and an ascent of e.g. enable individual manhole rings composed of manhole. So come as climbing elements e.g. Crampons or stirrups with an angled downward section should be taken into consideration, which at the same time ensure lateral guidance and a slip protection. Other types of climbing elements are also included.

In practice, various types of climbing elements in concrete parts, such as manhole rings, manhole necks or the like. Manhole parts, concreted in, for example, on the one hand, the long-known standard crampon made of cast iron and a much heavier and larger safety crampon, also made of cast iron, which should ensure a safe appearance due to its special shape. Furthermore, the stirrups already mentioned come into consideration as different types of climbing elements. In addition, concrete parts such as manhole rings and manhole necks must also be used in concrete plants or the like. Manhole parts or the like without any risers. transversely protruding elements are produced. This variety of manufacturing tasks has hitherto made it necessary to keep specially adapted mold cores with all details available and in stock for the different types. Since the concrete parts to be manufactured, in particular manhole rings, manhole necks or the like, can also be produced in different nominal widths and heights, this must also be taken into account by appropriately adapted cores. In this way, a large number of differently designed mold cores and individual parts for this need to be kept in stock, which is not only a disadvantage because of the large space requirement and the space costs, but above all makes large investment costs necessary.

Even if you e.g. different sized and shaped risers by special inserts, which one attaches to each manufacturing task in the core segment, this would have the considerable disadvantage that a large number of individual special inserts would have to be bought and kept in stock and maintained, which would also entail high costs would require. In addition, the retrofitting would be extremely time-consuming and, since it is labor-intensive, expensive. This also applies to any applications in order to be able to manufacture concrete parts, in particular manhole rings, manhole necks or the like, by means of a mandrel which is set up for the direct concreting of riser elements, without being able to manufacture such riser elements. Such inserts would e.g. Facing conceivable that have the same disadvantages described above.

Incidentally, the molding means, for example, are suitable for direct embedment of bent down to stirrups, in the structure different from those of other for direct embedment _S t _e ig _elemen t _{e, z. B.} normal crampons or heavier, larger safety crampons. The core segment for the direct insertion of cranked stirrups, for example, has the clamping devices assigned to each holder at a distance below the holder. The tensioning direction is from bottom to top, while the stirrup is released from top to bottom in order to overcome the downward bending of the stirrup. In the case of such core segments, on the other hand, which are intended for the direct concreting of crampons that are not bent downwards, the individual clamping devices are clamped from top to bottom and the loosening and releasing in opposite directions to the top. Retrofitting a mold core by changing inserts for the different shapes of risers is therefore not sufficient. Due to the different operating modes, for example, a mandrel that is set up for the direct concreting of brackets bent downwards cannot be converted to the other type by simply exchanging the inserts, receptacles and holding devices.

The invention has for its object to provide a molding device of the type defined in the preamble of claim 1, which reduces the number of different mold cores and also mold core parts for the production of concrete parts with different types of protruding elements, in particular risers, while saving investment costs for differently designed mold cores .

The object is achieved in a molding device of the type defined in the preamble of claim 1 according to the invention in that the core segment together with the respective receptacles and associated clamping devices and clamping drive is detachably and interchangeably held on the remaining part of the mold core.

This results in a significant cost saving because there is only one mold core and, in addition, for each type of protruding elements to be concreted directly during the production of the concrete part, in particular risers, and for the production of a concrete part without such protruding elements, there is only one core segment specifically designed for this are necessary. So you can use the rest of the mold core again and again, apart from the core segment. In order to adapt to the respective manufacturing task, only a specially adapted core segment is required and used. This significantly reduces the number of individual elements to be kept in stock, maintained and cleaned after use. This not only leads to space savings and space cost savings, but in particular to a reduction in investment costs. You are also able to switch from one type to the other very flexibly and quickly. The exchange of the core segment alone is quick and easy to do. Another major advantage is that you can quickly and easily remove a core segment used for maintenance and cleaning work and then also quickly and easily carry out work in places that otherwise could hardly be reached or only with great difficulty and under forced work . At the same time, it is advantageous that the inside of the mold core is removed by removing the core segment becomes free at the top. You can also clean, repair or maintain the mold core quickly and easily, even without having to do this from below and with great effort and possibly in difficult positions.

An advantageous further development results from claim 2. In this way, a particularly rapid change of the core segment is achieved without this being particularly connected to the drive device located in the remaining part of the mold core, e.g. by screws or other time-consuming manipulations

Due to the features in claim 3, a particularly quick, easy exchange of the core segment is achieved. The latter is simply inserted from above and pulled up in the opposite direction, without any other screw connection, clamp connection or the like. Nevertheless, it is ensured that when the core segment is inserted, the coupling to the drive device takes place automatically, which causes the horizontal movement between the release position and the closed position and also the pressing to seal the gaps in the closed position.

Further advantageous embodiments result from claims 4-7. In this way, vertical guide systems are created which are effective on both edges of the wall section of the core segment and which hold a core segment in the desired direction at the same time. In addition, the guide systems bring about reinforcement on the edge.

Claims 8 and 9 contain further advantageous embodiments. The strips on the wall section reinforce and stiffen the entire core segment. This and the pressing of the core segment in the closed position ensures that there is a rigid connection between the core segment used on the one hand and the rest of the mold core on the other hand during the shaping process by shaking, which ensures good transmission of the vibrations from the mold core to the core segment as well . It is thus achieved that the core segment is pressed together with the rest of the mandrel to form a solid vibrating unit. In addition, the strips with contact and sealing surface on the edge side of the wall section of the core segment ensure good sealing from bottom to top, so that concrete, in particular cement milk, cannot pass from the mold space through gaps into the interior of the mold core. If necessary, the lower edge of the wall section of the core segment is also equipped with a corresponding strip following the shape, for example curvature, of the wall section, which is also provided with a contact and sealing surface and is also pressed in this area against the lower edge of the core wall of the mold core becomes. It goes without saying that the recess in the lid in this direction, which is necessary for the horizontal movement of the core segment between the release position and the closed position, is not only deep enough in this direction but also sufficiently wide that the core segment can be exchanged without problems upwards or from above can be introduced. The cover part on the wall section of the core segment is larger than this recess on the cover side and lies flat on the edge the rest of the lid.

A further simplification results from the features in claim 10, since the strips serving for sealing and reinforcement are thereby also used as guide parts of the vertical guide systems. A further stiffening of the wall section and thus of the core segment is achieved by the features in claim 11 and, at the same time, both sides with simple means. Guide groove created.

It goes without saying that the relationships can also be kinematically interchanged, i.e. the guide groove part of the mandrel and the part engaging in the guide groove can be held on the core segment.

Further advantageous embodiments result from claims 12-15. As a result, guide systems are created with simple means, the individual elements of which at the same time form functional parts of the drive device or the edge-side reinforcement of the wall section of the core segment.

Further advantageous embodiments emerge from the claims 16-19 and 20, this forms each pivot lever hinged thereto, längenver- ä _nderba re _r a push rod type toggle. The length of the push rod can be changed by means of an adjusting spindle with left and right-hand threads. As a result, the contact pressure of the core segment on the core wall can be set very precisely. In addition, there is any wear or the like. the possibility of readjustment. The toggle lever system has the advantage that vibrations are good on the core segment are transmitted and, above all, a pushing back of the core segment under the effect of the concrete pressure is avoided in that the toggle arrangement absorbs this pressure. The drive device is therefore relieved of these forces. The length of the push rod can be adjusted so that the swivel lever with the push rod is in its dead center position when the core segment in the shaping position is pressed against the core wall of the mold core and is to be held in this way. The measures in claim 17 achieve parallel guidance of the core segment via the toggle lever arrangement.

The features in claim 21 ensure that when the core segment is shifted into the release position or into the closed position, a parallel shift of the core segment is guaranteed even without a special parallel guide for the core segment. Through the respective flow divider in the line leading to the hydraulic or pneumatic working cylinders, and specifically before the distribution to the two working cylinders, the flow of the pressurized working medium is divided into two equal flows, which are then fed to the two working cylinders, whereby both are separated balanced and move in parallel. Depending on the design of the control For the opposite drive movement, the working fluid under pressure can first be fed to a flow divider and only from there via individual lines and equally large partial flows to the working cylinders. It goes without saying, however, that even a single current divider can be sufficient for actuation in one working direction. In the opposite return movement is then achieved by this flow divider that the two return flows of the working cylinders are also the same size and then unite behind the flow divider again to form the total flow.

The features in claim 22 ensure that, during the shaping process, the pressure of the concrete acting on the wall section of the core segment from the molding space does not press the core segment out of the closed position in the direction of the release position.

A further advantageous embodiment results from claim 23. Here, the actuating element carrying the associated guide element is guided separately in the direction or approximately parallel to the translation direction, independently of the assigned translation drive. However, these separate guides and actuating elements require additional parts that are subject to wear in the long run and also require maintenance.

Instead, it can be particularly advantageous to make the design in the embodiment according to claim 13 as can be seen from claim 24. This results in direct guidance through the respective translation drive, in particular the working cylinder. The guidance is direct with a working cylinder through the parts of the working cylinder brought together! namely piston rod on the one hand and cylinder housing on the other. As a result, the number of nope parts, which saves costs. It is particularly advantageous that it provides completely maintenance-free guidance. At the same time, the wear is very low, since the piston rod is hard chrome-plated in such working cylinders and is therefore very wear-resistant. Otherwise, a special piston rod guide in oversized design and with a particularly good seal of the piston rod and dirt wipers can be selected, which ensure a long service life. It goes without saying that the cross section of the piston rod can also be dimensioned so that it has the required bending stiffness. In order to ensure the required closing pressure and the required abutment force, the pressure of the working cylinder can also be selected accordingly. An embodiment results from claim 25, in which the cylinder housing is fastened to the remaining part of the mandrel and the piston rod of the working cylinder is moved with a guide member fixed thereon. The reversal results from claim 26, in which the continuous piston rod is attached at both ends to the remaining part of the mandrel, while the cylinder housing of the working cylinder is displaceable relative to the piston rod on the latter together with the guide member attached to it. The piston is located on the middle of the piston rod. It is advantageous here that the same piston surfaces result when the cylinder housing is moved back and forth. In addition, very precise guidance is achieved since the cylinder housing has guides with a relatively large axial guide spacing on both end regions. A possible bending load can also absorb the piston rod very well, since it is connected to the remaining part of the mandrel in the area of both ends.

It is achieved by the features in claim 27 that the closed position of the core segment is still mechanically locked by means of the locking device, so that the drive device is relieved to secure the closed position.

The features in claim .28 on the one hand achieve a smooth change of the core segment and on the other hand ensure that the top of the mandrel is tightly closed, so that concrete cannot pass through gaps into the interior of the mandrel.

A further advantageous embodiment contains claim 29. This leads to a further stiffening of the core segment, in particular of the wall section. Even if a parallel guidance of the core segment with respect to the mandrel is not possible, such a parallel guidance is e.g. by the features according to claim 21, i.e. guaranteed by at least one current divider in the supply line of the two working cylinders.

Instead, the embodiment according to claim 30 is also advantageous. This provides mechanical horizontal guidance on the mandrel for the operation of the core segment used and its movement between the release position and the closed position. To replace the core segment, the cover part must be detached from the wall section and moved so far in the direction of the release position that the core segment can be removed.

The features in claim 31 substantially stabilize the mandrel, especially the rest of the core wall, which is thereby additionally stiffened against automatic opening or compression.

Further details and advantages result from the following description.

The full wording of the claims is not reproduced above merely to avoid unnecessary repetition, but instead is referred to only by mentioning the claim number, whereby, however, all these features of the claim are to be regarded as being explicitly disclosed at this point and essential to the invention.

• Fig. 1 eine schematische Seitenansicht des Formkernes einer Formeinrichtung zur Formgebung von Betonteilen gemäß einem ersten Ausführungsbeispiel,
• Fig. 2 einen schematischen Längsschnitt des Formkernes entlang der Linie II - II in Fig. 1,
• Fig. 3 einen schematischen Schnitt des Formkernes entlang der Linie III - III . in Fig. 2,
• Fig. 4 eine teilweise geschnittene schematische Ansicht der Antriebe des Formkernes mit Druckmittelversorgung,
• Fig. 5 eine schematische perspektivische Explosionsdarstellung von Einzelteilen des Formkernes,
• Fig. 6 einen schematischen Schnitt,etwa entsprechend demjenigen in Fig. 2, des oberen Teils eines Formkernes gemäß einem beispiel.
• Fig. 7 jeweils einen schematischen Schnitt, und 8 etwa entsprechend demjenigen in Fig. 3, einer Formkernhälfte gemäß einem dritten bzw. vierten Ausführungsbeispiel,
• Fig. 9 einen schematischen Schnitt des Formkernes, etwa entsprechend demjenigen in Fig. 3, eines fünften Ausführungsbeispiels,
• Fig. 10 eine schematische, zum Teil geschnittene Seitenansicht der Antriebseinrichtung in Fig. 9.

The invention is explained in more detail below on the basis of exemplary embodiments shown in the drawings. Show it:

• 1 is a schematic side view of the mold core of a molding device for shaping concrete parts according to a first embodiment,
• 2 shows a schematic longitudinal section of the mandrel along the line II-II in FIG. 1,
• Fig. 3 is a schematic section of the mandrel along the line III - III. in Fig. 2,
• 4 is a partially sectioned schematic view of the drives of the mandrel with pressure medium supply,
• 5 is a schematic perspective exploded view of individual parts of the mold core,
• Fig. 6 is a schematic section, approximately corresponding to that in Fig. 2, the upper part of a mandrel according to an example.
• 7 each shows a schematic section, and 8 approximately corresponding to that in FIG. 3, a mold core half according to a third or fourth embodiment,
• 9 shows a schematic section of the mold core, approximately corresponding to that in FIG. 3, of a fifth exemplary embodiment,
• 10 is a schematic, partially sectioned side view of the drive device in FIG. 9.

1-5 schematically shows a mold core 15 of a molding device which is part of a machine, not shown. The shaping device is used for shaping concrete parts, in particular manhole rings, manhole necks, well rings, transition rings or the like. Individual hites of such a shaping device are described in particular in DE-PS 31 10 185, to which express reference is made to avoid unnecessary repetition. The same applies to the mode of operation and the process flow in the shaping.

The mold core 15 is designed such that, during the shaping of the concrete part, a plurality of protruding elements of any type, in the present example crampons, can preferably be concreted into it from the inside at the same time. The term "crampons" used here encompasses all possible forms and configurations of such elements, which have the function of steps and allow access to a shaft composed of such shaft rings. The term crampons covers the normal crampons commonly referred to as well as heavier and larger safety crampons, e.g. each made of cast iron, as well as the climbing elements commonly referred to as stirrups. In this respect too, reference is made to DE-PS 31 10 185. Crampons of the type mentioned are not shown in FIGS. 1-5.

The mandrel 15 is approximately hat-shaped. It is hollow on the inside and can be replaced on a central vibrator. 14. The central vibrator 14 sits on a base plate 16. The mold core 15 contains a e.g. welded plate 17, with which it is placed on the central vibrator 14 and fastened. The plate 17 is e.g. about three-quarters of a circle. The mandrel 15 is here e.g. round - in another embodiment, not shown, but instead out of round, e.g. oval, square or the like. The mold core 15 has a circular cover 18 and a cylindrical core wall 19 leading down to the base plate 16.

The molding device also includes an outer mold jacket (not shown further) and, for example, a lower sleeve and an upper sleeve. These elements can be found in the prior art.

The mandrel 15 has an installation device 29, with the aid of which at least one crampon, preferably at the same time several crampons, e.g. four crampons, which can be concreted into the concrete part from the inside. The installation device 29 has a core segment 30, which here is formed from a cover section 31 and a wall section 32 of the mold core 15. The cover section 31 is somewhat larger than a cover-side recess 28 which, in the state according to FIG. 2, is sealingly overlapped by the cover section 31 on the three sides forming a U. The remaining part of the cover 18 containing the recess 29 is fastened to the core wall 19, in particular welded to it, or instead integrally therewith, where-. solidified by this remaining part of the mandrel 15 and stiffened against deformation in the area of the cover 18, in particular the core wall 19.

The wall section 32 of the core segment 30 has the shape of a section of the cylinder wall. Corresponding to the wall section 32, the cylindrical core wall 19 is provided with a cutout 34 which is shaped in the same way and which in the side view according to FIG. 1 is substantially U-shaped and extends from top to bottom. In a side view or section (FIG. 2), there is approximately an angular shape for the core segment 30. The core segment 30 forms an independent element in relation to the remaining part of the mold core 15, together with the cover section 31, which in the first exemplary embodiment according to FIGS. 1-5 is fastened, in particular welded, to the upper end of the wall section 32. The core segment 30 is in relation to the mold core 15 out of its shaping contour (FIGS. 1-3) in the direction of arrow 33 horizontally inwards into a not shown Release position and can be moved in the opposite direction to arrow 33 back into the closed position shown in FIGS. 1-3. If the core segment 30 is moved into the release position in the direction of the arrow 33, the wall section 32 leaves the cylindrical shaping contour of the core wall 19. In addition, the cover section 31 in FIG. 2 shifts to the left onto the remaining part of the cover 18. The cutout 34 in the core wall 19 is released. Crampons molded in during the shaping process are released from the core segment 30, so that the demoulding of the finished concrete part with crampons inserted directly therein can take place by relative displacement between the concrete part and the mold core 15 upwards or downwards. In the closed position of the core segment 30 shown in FIGS. 1-3, the latter is inserted into the remaining part of the mold core 15 essentially without any steps, especially without any gaps and in a sealed manner, thereby completing the shaping contour thereby predetermined.

The installation device 29 has each element to be concreted, e.g. Crampons, a receptacle 45-48, which is provided on the wall section 32 and in detail has a suitable contact surface with centering in the region of an opening 41-44, which is the positionally correct receptacle to be inserted there from the outside through the opening 41-44, element to be concreted, in particular crampons, before the shaping process.

The installation device 29 also has a tensioning device 88-91 for each opening 41-44 and receptacle 45-48, all of which are connected via round guide rods 92 to form a unit which can be moved vertically up and down. The round guide rods 92 can be moved vertically up and down in split plain bearings 93. All tensioning devices 88-91 have a single tensioning drive 94 in the form of a hydraulic or pneumatic working cylinder together, which engages on the one hand on the round guide rods 22 and on the other hand on a holder of the core segment 30, that is, like the clamping devices 88-91, is also part of the core segment 30.

A drive device 35 is provided for the horizontal translation movement of the core segment 30 in the direction of arrow 33 and back, which here has two individual translation drives in the form of hydraulic or pneumatic working cylinders 36, 37. Both extend essentially parallel to each other in the direction of arrow 33. They lie on the same diametrical plane intersecting the central axis 13 and here approximately at the middle of the height of the wall section 32, so that the translational actuating movement into the release position and into the closed position has at least essentially no moments can act on the core segment 30. ^-

The complete core segment 30, together with the respective receptacles 45-48 and the clamping devices 88-91 assigned to them and the common clamping drive 94, is detachably and interchangeably held on the remaining part of the mold core 15. In this way it is possible, depending on the type of protruding elements to be concreted in during the shaping process, for example crampons, to quickly use the core segment 30 required for this purpose in the adapted design, and thereafter if other elements, for example differently shaped crampons or the like ., are to be introduced in the same way directly in the shaping process, removed and exchanged for another core segment adapted to it. Since you generally have to shake different types of crampons or other protruding elements at the same time during the shaping process, you do not need completely adapted, different ones Keep mold cores in stock. Rather, it is sufficient to keep the smallest unit, namely the core segment adapted to it, in stock, which considerably reduces costs. The same mandrel 15 can also be used in the case of detached core segment 30 even if concrete parts are to be formed that do not have any protruding elements, for example crampons or the like. _{l should} contain, but are, for example, continuously cylindrical. Such molded concrete parts can either be produced with the same core segment 3G, with receptacles 45 to 48 ₁ that are completely closed by means of the clamping devices 88 to 91, or this core segment 30 is replaced by another one with a smooth and unbroken wall section 32.

The core segment 30 can be detachably connected to the drive device 35 in the form of the two translation drives 36, 37, so that the core segment 30 can be automatically coupled to it when it is introduced and can be automatically decoupled from it when it is removed. The translation drives 36, 37 are e.g. held with its housing on the end of a sheet metal serving at the same time the additional reinforcement of the core wall. The piston rod of each translation drive 36, 37 engages an actuating element 38 or 39, which is guided back and forth in a translatory manner on a guide parallel to the translation direction according to arrow 33 and is actuated by means of the translation drive 36 or 37. The leadership shows e.g. a guide rod 20 or 21, which passes through the control element 38 or 39 directly or a guide bush inserted therein. In Fig. 5 is indicated by dashed lines that two guide rods can be arranged one below the other for each translation drive 36, 37 to avoid possible tilting moments.

The core segment 30 is at least substantially parallel to the central axis 13 of the mandrel 15 from above in the remaining part of the mandrel 15 can be inserted and pulled in the opposite direction. When inserted, the wall section 32 of the core segment 30 can be automatically coupled to the actuating elements 38, 39 and the translation drives 36 and 37 actuated thereby, with the production of a form-fitting connection which, when the translation drives 36, 37 are actuated in the direction of the arrow 33 and in opposite directions, transmits forces allows on the wall portion 32.

The wall section 32, on the one hand, and the remaining part of the mandrel 15, on the other hand, have guide members 51, 52 and guides 53 and 54 which cooperate with them in the region of the side edges which are adjacent to one another and approximately parallel to the central axis 13 of the mandrel 15, on both sides of the cutout 34 that automatically come into guide engagement with each other when the core segment 30 is inserted.

In the exemplary embodiment shown, the guide members 51, 52 each consist of strips 55, 56 aligned approximately parallel to the central axis 13, which are fixedly connected to the actuating element 38, 39. The guide members 51, 52 designed in this way are arranged on the remaining part of the mold core 15 via the actuating elements 38, 39 and the translation drives 36, 37 actuating the latter.

The guides 53, 54, on the other hand, are part of the wall section 32 of the core segment 30. It goes without saying, however, that the conditions can also be reversed kinematically.

In the exemplary embodiment shown, the guides 53, 54 are formed on the two side edges of the wall section 32 as follows. The wall section 32 carries a bar 57, 58 attached to it on each side edge. Each bar 57, 58 projects at least partially laterally beyond the edge of the wall section 32 in the direction of the adjacent edge of the cutout 34 and carries it in this overhang region virtually as Fortset _- wetting of the inner surface profile of the wall section 32 extending mounting and sealing surface 59, 60 at right angles thereto an area extending 61 or 62. In the inserted state shown in FIG 1 bit 3 of the core segment 30 are the ground. and sealing surfaces 59, 60 on the edge, with gap sealing, on the adjacent side edge of the remaining part of the mandrel 15, namely on its core wall 19 on both sides of the cutout 34, the wall section 32 still firmly and permanently in the opposite direction to the arrow 33 via the translation drives 36, 37 is pressed so that the contact and sealing surfaces 59, 60 prevent the penetration of concrete, in particular cement milk, in spite of the slight gap in the edge region between the wall section 32 and the cutout 34. At the same time, this ensures a rigid connection between the core segment 30 on the one hand and the remaining part of the mandrel 15 on the other hand, thereby ensuring a good transmission of the vibrations generated by the central vibrator 14 for vibrating the concrete.

The strips 57, 58 running on both edges of the wall section 32 are at the same time designed as reinforcing strips which additionally stiffen the wall section 32. With its surface 61, 62, each strip 57, 58 forms part of the guide provided for each side edge of the wall section 32. An angle element 63 or 64 is fastened to each bar 57, 58 with an angle leg, which in the exemplary embodiment shown is dimensioned as long as the bars 57, 58, and thus exactly as long as the wall section 32. In another exemplary embodiment, not shown, instead of a continuous angle element, there are several individual angle pieces which follow one another at intervals. The other leg 65 or 66 of each angle element 63 or 64 runs at a distance from the surface 61 or 62 of the strip 57 or 58, whereby a guide groove 67 or 68 is formed therebetween. The width of the guide groove 67, 68 is slightly larger than the cross-sectional thickness of the strip 55 or 56, so that a trouble-free insertion of the core segment 30 from above and pulling out in opposite directions is possible.

In another embodiment, not shown, the guide members 51, 52 are formed from rods, rods or _the same linear parts, which are provided on each side edge of the wall section 32 on the remaining part of the mandrel 15. In a corresponding assignment, the guides 53, 54 are then designed as elements containing closed guide openings, bushes, eyes or the like, or also as strips, rails or as other elements containing grooves, which are fastened to each side edge of the wall section 32.

In the exemplary embodiment shown, a particularly simple design is achieved by the combination of actuating element 38, 39 with guide element 51, 52. When the core segment 30 is inserted, each strip 55, 56 moves from above into the edge-side guide groove 67 or 68 on the wall section 32, which is open at least at the lower end. Thereafter, the core segment 30 is moved by means of the two translation drives 36, 37 from the position in which the insertion takes place, e.g. from the release position, into the closed position by actuation in the opposite direction to the arrow 33, as well as back into the release position in the direction of the arrow 33. The closed position is reached when the contact and sealing surfaces 59, 60 of the strips 57 and 58 to the side of the recess 34 from come to the inside at the edge of the remaining part of the core wall 19. In this closed position, the core segment 30 is then pressed firmly and sealingly in the manner described.

Not shown further is a locking device assigned to the turning section 32 of the core segment 30 and mechanically locking it in the pressed closed position, which, when the closed position and the described pressing position are reached, e.g. occurs automatically or comes into the locking position by actuating a special own drive. This locking device has e.g. one locking member per side edge of the wall part 32, e.g. can consist of a toggle lever or other elements known per se.

Although there is no fixed connection between the core segment 30 in the retracted position (FIGS. 1 to 3) and the actuating elements 38, 39, driven by the translation drives 36 and 37, and consequently there is no exact parallel guidance, a parallel guidance of the core segment 30 is nevertheless in the case Actuation of the translation drives 36, 37 in the opposite direction to the arrow 33 and in the direction reached. Both working cylinders 36, 37 are designed as double-acting working cylinders, to which the working medium is supplied under pressure via line 69 for the adjusting movement in the closing direction, in the opposite direction to arrow 33, while the working medium under pressure via the line for the opposite adjusting movement in arrow direction 33 72 is supplied. The working fluid, which is guided in line 69, for example, does not reach the working cylinders 36, 37. Rather, the flow of working fluid is first divided into two equal individual streams by means of a flow divider 69a, which then lead to the individual working cylinders 36, 37 via assigned lines 70, 71. In the opposite direction, the working fluid is supplied via line 72 and distributed to lines 73, 74. The flow divider 69a ensures that the two return flows of the working cylinders 36, 37 in the lines 70, 71 are of the same size and are combined in the line 69. The two working cylinders 36, 37 generated contact force in the direction opposite to the arrow 33 is greater than the pressure of the concrete in the molding space acting on the wall section 32 of the core segment 30 during the molding process, so that the wall section 32 is thus firmer, with the rest of the mold core 15 rigid connected part of the entire mandrel 15.

In the second exemplary embodiment in FIG. 6, the parts which correspond to the first exemplary embodiment are used by 100 larger reference numerals, so that reference is made to the first exemplary embodiment in order to avoid repetitions.

6, only the upper part of the mandrel 115 is shown. In this case, unlike in the first exemplary embodiment, the cover section 131 is not a part that moves with the core segment 130. Rather, the cover section 131 is firmly connected on the underside to a guide member, for example in the form of a guide rod 180, which is oriented essentially at right angles to the central axis 113 and thereby essentially horizontally and is guided in a guide bushing 181 so that it can be moved back and forth in the horizontal direction according to arrow 182 . The guide bushing 181 is fastened to the remaining part of the cover 118, which is firmly connected to the remaining part of the core wall 119. The cover section 131 is detachably connected to the core segment 130 in the region of the upper end of the wall section 132 via countersunk screws 183, which are screwed into a retaining ring 184 on the inside of the wall section 132. Before the core segment 130 is removed, for example for changing purposes, the cover section 131 must first be removed from the wall section 132 by removing the countersunk screws 183 and displaced to the left in the direction of arrow 152 at least sufficiently far in FIG. 6 that after that the wall section 132 existing core segment 130 with other parts can be removed upwards can. The procedure is reversed when a new core segment 130 is inserted. Otherwise, the cover section 131 remains firmly connected to the wall section 132, in particular when it comes to the demolding process in which the core segment 130 moves horizontally in FIG Release position is moved and then back to the closed position. It is advantageous here that the guide rod 180 and guide bush 181 provide additional parallel guidance during this movement of the core segment 130 from the release position into the closed position and back.

In the third and fourth exemplary embodiment in FIGS. 7 and 8, the parts corresponding to the first exemplary embodiment are given 200 and 300 larger reference numerals, respectively, so that reference is made to the description of the first exemplary embodiment.

In the third exemplary embodiment in FIG. 7, the guide member 251 is arranged fixedly on the moving part, namely the cylinder housing 275, of the translation drive 236. The element carrying the strip 255, for example a U-profile, is screwed to a holding member 276 which is welded to the cylinder housing 275. The translation drive 236 is double-acting. Its piston rod 277 is continuous and is attached at both ends to angles 278 which are welded to the core wall 219, for example. In this way, the core segment 230 is thus fastened to the cylinder housing 275 and guided back and forth on the piston rod 277. The guidance is very precise since the cylinder housing 275 has guides on both end regions with a relatively large guide section. The bending load on the piston rod 277 is also very well absorbed by its mounting at both ends. The piston located on the center of the piston rod 277 has pistons of the same size, laughing on the left and right, so that the same forces and speeds result for the movements in both directions at the same pressure. This direct Leadership leads to complete freedom from maintenance. Wear is also very low because the piston rod 277 is hard chrome-plated.

In the fourth exemplary embodiment in FIG. 8, the relationships are reversed. The translation drive 337 here consists of a double-acting working cylinder, too, but in a foot design and with a piston rod 377 projecting on one side. The translation drive 337 is screwed to a mounting plate 396 with the foot parts 395. In this way, the cylinder housing 375 is a fixed part of the mandrel, while the piston rod 377 is displaced relative to it. At the end of the piston rod 377, the guide member 352 is directly attached, here the bar 356 as part e.g. of a U profile. The piston rod 377 has a larger cross-section in order to achieve high bending stiffness.

In the fifth exemplary embodiment according to FIGS. 9 and 10, the drive device 435 has at least one pivot lever 485 for each of the two guide members 451, which is pivotally connected at its right end to a push rod 486, which in turn is articulated with the actuating element 438 carrying the strips 455 is connected to its translation movement. The push rod 486 is adjustable in length via an adjusting spindle with left-hand and right-hand threads. It works on the respective guide member 451. The left end of the pivot lever 485 in FIGS. 9 and 10 is connected in a rotationally fixed manner to a shaft 487 which is pivotably mounted on the core wall 419. The pivot lever 485 forms together with the push rod 486 a kind of toggle lever, the functional length of these two parts in the region of the push rod 486 being set such that in the shaping position of the core segment 430 the pivot lever 485 with the push rod 486 assumes a dead center position in which over both Elements of required contact pressure of the core segment 430 to the core wall 419 is given. This has the advantage that the vibrations are well transmitted to the core segment 430 when shaking in, and the core segment 430 cannot be pushed back under the concrete pressure, and the drive device 435 also does not have to apply any correspondingly large counterforces.

A parallel guidance of the core segment 430 is then possible via this arrangement, even if the same arrangement is selected for the other guide element (not shown) and the pivot lever of which is also connected to the shaft 487 in a rotationally fixed manner.

For pivot actuation of the respective pivot lever 485 with push rod 486, the drive device 435 for each of the two pivot levers 485 can have its own, directly engaging translational drive, which is indicated schematically in Fig. 9 with 497 and which e.g. about the middle of the pivot lever 485 hinges to pivot it. Instead, the drive device 435 can also have a translation drive in the form of a working cylinder 498 (FIG. 10) common to both swivel levers 485, which operates on a drive lever 499 which is connected in a rotationally fixed manner to the shaft 487 and on which the working cylinder 498 is at a distance of major Shaft 487 acts on the pivot actuation of the shaft and thus the two pivot levers 485. The drive lever 499 expediently sits approximately centrally on the shaft 487, so that no unequal forces act on the two pivot levers 485 due to a possible torsion of the shaft 487.

Claims (31)

1. Molding device for shaping concrete parts, for example manhole rings, manhole necks or the like, provided with preferably several protruding elements, in particular climbing elements, such as crampons, stirrups or the like, with an approximately hat-shaped mandrel (15; 115) with, for example, cylindrical core wall (19; 119) and an upper cover (18; 118), wherein the mold core (15; 115) has an installation device (29) for concreting the protruding elements, in particular risers, from the inside into the concrete part to be molded during the molding process, which at least one core segment (30; 130) forming at least one wall section (32; 132) of the core wall (19; 119), which by means of a drive device (35) in relation to the remaining part of the mold core (15; 115) out of its shaping contour a release position that allows at least the demoulding of the concrete part with embedded elements, in particular climbing elements, and can be moved back into a closed position in which s core segment (30; 130) fits into the remaining part of the mold core (15; 115) while completing its shaping contour, and the furthermore, each element to be concreted, in particular the riser element, has a receptacle (45-48) and a clamping device (88-91) associated therewith with a clamping drive (94), characterized in that the core segment (30; 130; 230; 330) together with the respective receptacles (45-48) and associated clamping devices (88-91) and clamping drive (94) are detachably and interchangeably held on the remaining part of the mold core (15; 115). 2. Molding device according to claim 1, characterized in that the core segment (30; 130; 230; 330) can be detachably coupled to or decoupled from the drive device (35; 235; 335). 3. Molding device according to claim 1 or 2, characterized in that the core segment (30; 130; 230; 330) in at least substantially parallel to the central axis (13; 113) of the mold core (15; 115) from above in the rest Part of the mandrel (15; 115) can be inserted and pulled out of it in opposite directions. 4. Molding device according to one of claims 1-3, characterized in that the wall section (32; 132) of the core segment (30; 130; 230; 330) on the one hand and the remaining part of the mold core (15; 115) on the other hand in the area of each other have adjacent guide members (51, 52; 251; 352) which run approximately parallel to the central axis (13; 113) of the mandrel (15; 115) and cooperate with these guides (53, 54) which, when the core segment (30; 130; 230; 330) automatically come into contact with each other. 5. Molding device according to claim 4, characterized in that the guide members (51, 52; 251; 352) are formed from bars, rods, strips (55, 56; 255; 356) or similar linear parts, which are arranged on each side edge of the wall section (32; 132) of the core segment (30; 130; 230; 330) are provided. 6. Molding device according to claim 4 or 5, characterized in that the guides (53,54) from bushes, eyes or the like closed elements containing guide openings or from strips (57-68), rails or grooves (67,68) containing Elements exist which are provided for each side edge of the wall section (32; 132) of the core segment (30; 130). 7. Molding device according to one of claims 4-6, characterized in that the guide members (51,52; 251; 352; 55,56; 255; 356) on the remaining part of the mold core (15; 115) and the guides (53, 54, 55-68) are arranged on the wall section (32; 132) of the core segment (30; 130; 230; 330). 8. Molding device according to one of claims 1-7, characterized in that the wall section (32; 132) of the core segment (30; 130; 230; 330) carries strips (57, 58) attached to each side edge, each of which projects laterally and, as a continuation of the inner surface course of the wall section (32; 132), bear abutting and sealing surface (59, 60) with which, when the core segment (30; 130) is inserted, the wall section (32; 132) has an edge seal at the adjacent side edge of the rest Part of the mandrel (15; 115) abuts, is preferably pressed. 9. Molding device according to claim 8, characterized in that the strip (57, 58) is simultaneously designed as a reinforcing strip of the wall section (32; 132). 10. Molding device according to one of claims 4-9, characterized in that each strip (57, 58) also forms a part (61, 62) of the guide (53, 54) of the wall section (32; 132) provided for each side edge. 11. Molding device according to one of claims 4 - 10, characterized in that on each bar (57, 58) an angular element (63, 64) is fastened, which extends over the length of the bar or is divided into several pieces that are spaced at intervals, of which an angle leg (65,66) to form a guide groove (67,68) at a distance from a strip surface (61,62). 12. Molding device according to one of claims 1-11, characterized in that the drive device (35; 235; 335) of the core segment (30; 130; 230; 330) at the same time at least one guide member (32; 132) assigned to the side edge of the wall section ( 51.52; 251; 352; 55.56; 255.356) and actuated. 13. Molding device according to one of claims 1-12, - characterized in that the drive device (35; 235; 335; 435) two spaced-apart guide members (51,52; 251; 352; 451) in the translation direction (arrow 33) or actuated back and forth in parallel therewith, with which the wall section (32; 132; 232; 332) of the core segment (30; 130: 230; 330) can be automatically and positively coupled in the direction of translation when inserted. 14. Molding device according to claim 13, characterized in that each guide member (51,52; 251; 352) carries a bar (55,56; 255; 356) or bar sections which runs approximately parallel to the central axis (13; 113) when inserting the core segment (30; 130; 230; 330) into a guide groove (67,68) on the edge, which is at least open at the bottom. Drive in at the wall section (32; 132) from below. 15. Molding device according to one of claims 8 - 14, characterized in that the core segment (30; 130; 230; 330) by means of the drive device (35; 235; 335; 435) from the closed position into the release position (arrow 33) and back movable and also in the state of the closed position with the contact and sealing surface (59, 60) of the strips on both sides (57, 58) can be pressed firmly and sealingly against the adjacent wall area of the remaining core wall part (19; 119). 16. Molding device according to one of claims 13 - 15, characterized in that the drive device (435) for each guide member (451) has at least one pivot lever (485), which is linked to a length-adjustable push rod (486) on the associated guide member (451) works. 17. Molding device according to claim 16, characterized in that the two pivot levers (485) assigned to a guide member (451) are connected in a rotationally fixed manner to a shaft (48 /) mounted on the core wall (419). 18. Molding device according to claim 16 or 17, characterized in that the drive device (435) for each pivot lever (485) one directly engaging and this with the shaft (487) pivoting translation drive, such as hydraulic or pneumatic working cylinder (497). 19. Molding device according to claim 16 or 17, characterized in that the drive device (435) a two pivot levers (485) common translation drive, e.g. Hydraulic or pneumatic working cylinder (498), which works on a rotationally fixedly connected to the shaft (487) drive lever (499), on which it is articulated at a distance from the shaft (487). 20. Molding device according to one of claims 1-15, characterized by two spaced apart, on the remaining part of the mandrel (15; 115) held translation drives (36 ₁ 37; 236; 337), for example hydraulic or pneumatic working cylinders. 21. Molding device according to claim 20, characterized in that the two working cylinders (36, 37) for actuation, at least in one translation direction, the working medium under pressure by means of a flow divider (69a). Which divides the working medium flow (69, 72) into two equal flows ( 70, 71 or 73, 74), can be fed. 22. Molding device according to one of claims 20 or 21, characterized in that the contact pressure generated by the two working cylinders (36, 37; 236; 337) is greater than that on the wall section (32; 132) of the core segment (30; 130; 230; 330) pressure of the concrete during the shaping process. 23. Molding device according to one of claims 20, characterized in that each on the remaining part of the mandrel (15; 115) held guide member (51,52) is part (55,56) of an associated actuating element (38,39) which on a Guide (20, 21) of the mandrel (15; 115) is guided in translation. 24. Molding device according to one of claims 20 - 22, characterized in that each guide member (251; 352) is fixedly arranged on the moving part (275; 377) of the respective translation drive (236; 337) and together with this moving part (275; 377 ) on the other part (277; 375) of the translation drive (236; 337) held firmly on the mandrel (230; 330). 25. Molding device according to claim 24, characterized in that each translation drive (337), in particular working cylinder, is attached with its cylinder housing (375) to the mold core (319) and on its moving piston rod (377) the associated, thereon fixed guide member (35 _2nd , 356). ² 6. A molding means according to claim 24, characterized in that the DAB each translational drive (236), especially working cylinder, is fixed by its continuous piston rod (277) on the mold core (219) and the associated at its moving cylinder housing (275) thereon fixed guide member ( 251, 255). 27. Molding device according to one of claims 1-26, characterized by a locking device mechanically locking the wall section (32; 132; 232; 332) of the core segment (30; 130; 230; 330) in the pressed closed position. ₂₈ Molding device according to one of claims 1-27, characterized in that the core segment (30; 130; 230; 330) has, in addition to the preferably partially cylindrical wall section (32, 132), a cover section (31; 131) at the upper end of the wall section (32; 132) which sealingly overlaps a recess (28) in the cover (18; 118) of the mandrel (15; 115). 29. Molding device according to claim 28, characterized in that the cover section (31) of the core segment (30) is fastened to the wall section (32) thereof, in particular is a welded-on or integral component of this part of the core segment (30) which is also moved. 30. Molding device according to claim 28, characterized in that the cover section (131) along an at least substantially perpendicular to the central axis (113) of the mold core (115) extending guide (180,181) on the remaining part of the mold core (115) can be moved back and forth ( Arrow 182, Fig. 6) is guided and held there and that the cover section (131) on the wall section (132) of the core segment (130) adjacent edge can be detachably connected to the wall section (132). 31. Molding device according to one of claims 1 to 30, characterized in that the remaining cover part (18; 118) on the remaining wall part (19; 119) of the mold core (15; 115) is fastened, in particular welded or is an integral part of this.

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