CN1032908C

CN1032908C - Accumulator head for blow molding machine

Info

Publication number: CN1032908C
Application number: CN91110660A
Authority: CN
Inventors: P·兰戈斯; M·莱曼
Original assignee: Mauser Werke GmbH
Current assignee: Mauser Werke GmbH
Priority date: 1991-10-04
Filing date: 1991-10-04
Publication date: 1996-10-02
Anticipated expiration: 2006-10-04
Also published as: CN1071365A

Abstract

The present invention relates to a material storage head on blow molding machines for intermittently producing plastic hollow members. The material storage head is provided with at least one extruding machine connected with the material storage head, wherein the extruding machine is used for transmitting at least ordinary melting plastics into an axis arranged along the center. The axis is enclosed by a distributing device concentrically arranged in a spiral hole passage shape; the spiral hole passage makes the melting plastics flow through a cylindrical model and enter an annular material storage space positioned on the bottom of an injection cylinder. The injection cylinder which slides in an axial direction is arranged in a shell; moreover, the melting plastics stored in the material storage space are injected by an annular gap communicated with the lower side of the material storage space.

Description

The material accumulating head that is used for blow molding machine

The present invention relates to the material accumulating head on a kind of blow molding machine of producing plastic hollow spare off and on, this device has at least one extruder that links to each other with this device, is used for one melts the attitude plastics and sends in the axle that is provided with along the center at least.This distributor by the channel-like in the shape of a spiral of concentric setting is surrounded, and foraminous spiral tract makes and melts the attitude stream of plastic and cross cylindrical model and it is entered and be positioned at the ring-type of injecting cylinder bottom portion and hold material space.The injection cylinder of Hua Donging is located in the shell vertically, and by with hold annulus injection that the material space downside communicates and be stored in to hold and melt the attitude plastics in the material space.

The material accumulating head that can contrast is described in detail the sort of among the DE-OS3000444.Distribute the foraminous spiral tract distributor that melts the attitude plastics to be located on the outer wall of injection ram.Provide to helical duct by the axial groove on the helical duct on two outer walls that are positioned at injection ram and to melt the attitude plastics.These grooves be arranged on the material accumulating head shell on be used to the radial hole of extruder feed to be connected.Its shortcoming is: owing to distribute plastics along circumference, injection ram moves to its injection moulding position, top gradually so storage space is filled, the foraminous spiral tract distributor is subjected to the restriction by two outer walls that move relative to each other continuously, thereby makes the plastics that enter be subjected to continuous shear action.Therefore, in injection operation, there is not clear and definite injection moulding edge in the outside of injection ram.This just means that the whole outside of the plastic column in the storage space adheres to the inboard of storing shell, thereby can not be injected on the whole cross section equably, and wedge shape can outwards be pressed into, adhere to and store on the shell and sheared or besmirch, this just causes not wishing the material shifts that occurs and cause producing higher interior friction and uneven pressure in melting the attitude plastics.The result moulds on base or blowing hollow body or final the producing at tubulose to produce the disturbance bottom.

These shortcomings should be avoided.The present invention's suggestion is carried out qualitative improvement to the blowing hollow body, its method is the dispenser device by a foraminous spiral tract distributor form, this device favourable layer that generation one is made up of multiple stack in the bin stock head after having carried out all even complete injection, and can the disturbance endothecium structure.

Melt the attitude plastics and be positioned at and inject cylinder, inject cylinder and be made up of two cylindrical sleeve at least, cylindrical sleeve is provided with the foraminous spiral tract of distributor and is covered by another cylindrical sleeve, and therefore, the plastics that are distributed on the whole wall flow out from annulus.

This design of injecting cylinder means that distribution system is positioned at the inside of injecting cylinder, has fixing helicla flute outer limit and inject cylinder self.Why the plastics of uniformly dispersing can enter the bin stock space, are owing to have the anterior cause of the injection cylinder of swing relatively.The distributor space of helical duct distributor can not be subjected to the restriction of the opposed wall of continuous relative another interface motion.So just can avoid the shear action that in synthetic, produces when just in time beginning distributing by internal friction by wall.In addition, identical condition has been controlled injection moulding process.Smoothly and in both sides (outer wall of axle and the inwall of shell and the outer edge of injecting the bottom of cylinder) is limited to approximately identical height in maintenance fully around the bin stock space, so that along with injection moulding process carries out, the inhomogeneous shear surface that is caused by uneven shearing force does not occur, and uneven shearing force can influence the plastics of storing.

Which floor thin, staggered or overlapped layer the foraminous spiral tract distributor of injection cylinder is distributed into melting the attitude plastics in an advantageous manner on wall, make up the plastic layer that obtains like this and be not subjected to interference in the distributor space or that holding the material distribution in the material space injection moulding process.Therefore, formed product does not have undesirable striped and material, but several individual layer sticks together, and promptly have more than at radially an injection moulding limit or a narrow overlapping portion to stick together, but the whole surface of several thin layer sticks together.Improved the quality of blowing hollow body product so significantly.

From machining angle, will be favourable if the interior overcoat section of injection cylinder is made up of two and half shape shells.

As a special characteristic of the present invention, the foraminous spiral tract distributor is located on the outer wall of inside race and/or outer casing inner wall that injects cylinder.The axial length of the single foraminous spiral tract of each of distributor is approximately identical with the diameter of section of the recessed cover that helical duct arranged.For using this material accumulating head on the injection machine of batch processed hollow bodies, or for the distributor that uses foraminous spiral tract distributor form, all plastic pellets can demonstrate improved stack and improved distribution of melting attitude stream in uniform flow behavior and the distributor aspect rheological characteristic, the result has improved productivity ratio.

The foraminous spiral tract distributor can with a plurality of bends of specific gradient be recessed in outer wall of inside race or outer casing inner wall on helical duct compare.Foraminous spiral tract is separated the ground feeding and its degree of depth reduces on flow direction gradually.Therefore, spiral flow is transformed into axial flow gradually.Formed a toroidal shell in the gap of axial flow broadening between foraminous spiral tract distributor and its shell.The axially-movable of the foraminous spiral tract of separating melt axial flow and the stack of the axial flow in the mobile residue below the mobile residue that melts attitude stream in attitude stream and the foraminous spiral tract.

A particular form of the present invention is: the foraminous spiral tract of foraminous spiral tract distributor is through at least one cannelure feed, groove is positioned at the approximately height identical with foraminous spiral tract like this, and in the bottom, groove is connected on the extruder through a radial hole and the foraminous spiral tract section start in the upper end.Thereby melt the attitude plastics and directly enter into the foraminous spiral tract section start that separates that injects in the cylinder by the distributor header shell wall through two or four adjacent feeder channels.Because cannelure is arranged on approximately and the place of foraminous spiral tract equal height, therefore, link on the extruder through radial hole in these grooves place below, and the position links to each other with the helical duct section start in the above, thereby advantageously shortened the structure of distributor.

Yet, the foraminous spiral tract distributor also is applicable to the situation of the batch processed laminated plastics hollow body of two extruders at least, this extruder with utilize two independently distributor distribute the distributor header shell of two kinds of different materials (for example that reclaim with new material) to be connected to circumferencial direction.

Hollow body distributor existing processing multilayer, extruding simultaneously melts the attitude stream of plastic for layer (until the 5 layers) guiding of each separation, makes it by being used for distributing to whole wall the circular passage of plastics; Plastics flow through an annulus therefrom and enter and are positioned at the bin stock space of injecting the cylinder bottom.In this case, its shortcoming is that two semi-circular features engage the place beyond the loader position, joint close always occurs, a significantly seam finally occurs on shaped article, so this is a defective.In the multilayer hollow body of extruding at the same time, inseam is covered by skin subsequently, and on final products, they still have some undesirable stripeds.

Be used for distributing from extruder coming out and the distributor device that enters the plastics in the bin stock shell on circular closure space (as circular passage or innermost being shape distributor) also is known.Some synthetic molecule or particles must flow through different mobile distances.The place of meeting in the tributary of separating is formed on can see a seam that draws on the final products.Can reduce product quality like this.

The present invention proposes a kind of newly-designed injection machine material accumulating head that is used for batch processed high-capacity hollow bodies, when melting that the attitude plastics flow into and in distributor the time, this device all has identical flox condition to all particles aspect rheological characteristic, the stack and the diffusion of melting attitude stream in the distributor are improved, improved productivity ratio simultaneously again.

Consider that from the structure angle inject cylinder and be made up of at least two concentric locking collars, each cover all constitutes one with cylindric distributor.

Design recommendation of the present invention is a kind of in the technology of after extruder is supplied with the multi-channel system of melting the attitude plastics and making it to combine multilayer being pushed together.Separately several strands melt attitude stream and are entered in several radial holes by axial center stream (main flow).Melting of being connected with the symmetry center feed mode that attitude distribution of material device (helical duct) combines has been guaranteed to melt the attitude plastics and has been distributed fully symmetrically and vertically rise in the bin stock space.There, separate which floor be combined into single multilayer composite tube again.In the goods of extruding at the same time, each particle in each part all has the identical rheology flow process that not influenced by extruder speed.This fact has caused the distribution in the wholecircle week of complete symmetry.

In the present invention, the longitudinal length of each distributor or the foraminous spiral tract that separates, approximately identical with its cross section, wherein have at least two or four foraminous spiral tracts be evenly dispersed in distributor around, so that pass through the interior axial hole of axle as the attitude stream that melts of main flow, and the foraminous spiral tract that separates is provided with the tributary that diverges to the radial hole of star arrangement via the center.How curved passage or foraminous spiral tract contrast that the foraminous spiral tract distributor can have specific gradient with (for example the axle, that inject cylinder or supplementary cap) or (for example injecting on cylinder, supplementary cap or the material accumulating head shell) on the inwall that be arranged on the outer wall.Dividually to the foraminous spiral tract feed, and their degree of depth streamwise reduces.Thereby the fluid in the foraminous spiral tract little by little is transformed into axial flow.Outer inner room at the annular space of the expansion of foraminous spiral tract distributor and it has formed axial flow.The axial flow of foraminous spiral tract separately melt attitude stream with below the axial flow stack and with foraminous spiral tract in the mobile residue stack of melting attitude stream.As previously mentioned, the material that send to the foraminous spiral tract that separates continues the centre bore by axle, and this centre bore melts the attitude synthetic according to the number of foraminous spiral tract is radiation from the center starlike distribution.

Main feature of the present invention is that dispenser device is a cylindric foraminous spiral tract formula distributor (annulus).The foraminous spiral tract distributor matches with the center feed that melts attitude stream that separates and has very significant advantage.

The center feed has guaranteed that all compound particles all have impartial flow process in rheology.The foraminous spiral tract distributor has only been used a remote stack that the materials flow disperser has just realized melting attitude stream.

Compare with the distributor formula innermost being shape distributor of traditional band shape passage, the present invention can improve output, and (for example the processing capacity of 20-L type head is 650kg/hr-800kg/hr) and has improved the distribution of material on the whole circumference.

In the place of the injection cylinder distribution synthetic material of head reservoir, well-known output of melting attitude distribution of material device improves, and will be subjected to the restriction of material conditions, when surpassing, will cause product quality to descend, and for example can obviously see shallow hole or microscler seam.

In the material accumulating head of extruding simultaneously of the present invention, inject cylinder and form by several cylindrical sleeve, have the foraminous spiral tract distributor on the outer surface of each cover, and the inner surface while is as the fixed cap of next helical duct distributor.For fear of acting on the shearing force of melting the attitude material because of producing on the inwall that adheres to the shell of doing relative motion, the external spiral channel distributor is fixed to one and injects being covered by the thin sheet of metal cover on the cylinder.

A kind of three layers simultaneously the Application Example of material accumulating heads of extruding have the such feature of extruder that the supply inequality of three platform independent is melted the attitude synthetic, extruder is delivered to material in the separated foraminous spiral tract distributor by center feed orifice on the main shaft.Plastics adhesive-free not of the same race and being combined into one.

The internal layer of three layers of preform is by high-quality pure raw material, new plastic as high-density polyethylene (HDPE) is formed, perhaps if plan to charge into dangerous liquid, then it is characterized in that adding the additive (for example celar disks) that suppresses diffusion--and than thick-layer, be that middle support layer is made up of particle regeneration and that reclaim again, skin is playing a part color base, and it is made up of the material of new wounded look pigment.

Three layers preform has used two extruders, and the middle level is made up of granular charges again, and internal layer and outer extruder by-platform extruding new material come feed.

Use foraminous spiral tract distributor of the present invention can obtain following advantage:

---only have a distributor to make to separate melt attitude stream or layer is realized remote smooth stack;

---the length of stack is along the circumferential direction calculated above semi-circumference and is reached 240 (radians) (this bonding for the stream of plastic of separating is important); For the purpose of using, can adopt 6 circles and 240 to spend until becoming the quadruple stack.

---all are melted attitude stream all have identical rheology flow behavior;

---foraminous spiral tract distributor of the present invention is compared with the traditional dispensers of innermost being shape distributor, can boost productivity really (be increased to 800kg/hr from 650kg/hr when for example using L-20, the circumference that has improved synthetic material simultaneously distributes);

---because independently to each foraminous spiral tract feed,, thereby and improved output greatly so the material accumulating head of band foraminous spiral tract can be realized faster and better circumference distribution.

The invention will be further described with reference to the accompanying drawings.

Fig. 1 represents the material accumulating head of the two-layer hollow body of production of the present invention;

Fig. 2 represents second kind of material accumulating head of three layers of hollow body of production of the present invention;

Fig. 3 is the third material accumulating head of the present invention;

The material accumulating head of the cross section of Fig. 4-7 expression material accumulating head and one deck hollow body produced according to the invention.

Among Fig. 1, the shell of a material accumulating head of drawing reference numeral 10 expression injection machines.Axle 12 moves at the center of shell 10.Injecting cylinder 14 links with axle 12 by means of the pushing bolt 18 that fluid power drives.The inboard of shell 10 is close in the outside of injecting cylinder 14.The bottom of the injection cylinder 14 of bin stock space 16 between axle 12 and shell 10 remains on middle in order to will melt the attitude plastics.Collected laminated plastics little by little makes injection cylinder 14 rise to the injection phase in bin stock space 16.In case bin stock space 16 is filled, the synthetic that is held is squeezed out and utilizes simultaneously the injection cylinder 14 that moves downward, release or extrude the tubulose preform simultaneously by the looping pit between center of orifices core 24 and spray orifice ring 26 28, and it is guided to an opening blowing mould that is positioned at the bottom.

Expression is injected cylinder 14 and is in its extreme lower position (injection phase) among Fig. 1, and according to the present invention, it is made up of three

concentric die sleeves

42,44,46, is rigidly connected mutually between them.The distributor that brings to few four foraminous spiral tracts is set on the surface of interior cover section 42 and middle cover section 46.Overcoat section 44 is only as the lid of foraminous spiral tract distributor.

From two extruders come out to flow through

feed orifice

32 and 32 radially ' two strands of infusion central parts enter the axle 12 and deflection and entering among axial hole 22 and 22 ＇ there.The centre bore 22 and 22 of axle on 12 ' length be 1 times of hole 22,22 ' own diameter at least, but preferably 3 times.

From centre bore 22,22 ', this burst main flow feed a plurality of radial holes 30,30 ' after be divided into several bursts of tributaries, these tributaries are introduced in the separated helicla flute of foraminous spiral tract distributor.The tributary is transformed into movable injection cylinder 14 from fixed axis 12 through radial hole 30 to be gone to cause ascending motion.

Feature of the present invention is that one of them pushing bolt 18 links to each other with injection cylinder 14 at least, is used for injecting downwards into cylinder 14.It is hollow having a pushing bolt 18 at least, perhaps is provided with as melting the axial hole 38 that the attitude plastics are delivered to the feeder sleeve of dispenser part.

Under the situation of present embodiment, have only 3 to be hollow in 6 pushing bolts.The supply channel 52 that injects cylinder 14 is led to from the cannelure 38 of radial hole 30 in hollow pushing bolt 18 in the tributary.

Each supply channel 52 is at cylinder surfaces direction upper bifurcation (promptly being divided into 2 tributaries), and the attitude plastics are melted in conveying in two adjacent foraminous spiral tracts, therefore, melt the attitude plastics through 3 hollow pushing bolts 18 be sent to external spiral duct distributor 20 ' 6 separated foraminous spiral tracts.

Inside spin duct distributor 20 melts the attitude plastics through the cannelure 34 ' acquisition of recessed axle outer wall.The tributary of independently distributing is positioned at the lamellar injection cylinder or the front portion of dispenser device independently, and is connected into into the bin stock space 16 of multilayer plastic pipe, intermittently injects, and the material flow of promptly extruding is simultaneously come out from annulus 28.

Fig. 2 represents three-layer co-extruded head.Melt the attitude plastics through radial hole 32, the axle that links to each other with radial hole 32 in 12 axial hole 22 and the radial hole 30 (tributary) of perforation be sent to hollow pushing

bolt

18 and 18 ' (through groove 34).Through 3 hollow pushing bolts 18 to foraminous spiral tract distributor 20 feedings on the intermediate sleeve 46 of being positioned at that are communicated with hole 30, simultaneously through the foraminous spiral tract distributor 20 ' feeding of other 3 hollow pushing bolts 18 ' on overcoat 44.This method of the present invention also can be distributed into two simultaneous layers sooner, better and more productive by a large-scale extruder that is furnished with two distributors.

The sectional view of the left-half of accompanying drawing is represented foraminous spiral tract distributor 20; Be used to avoid the thin sheet of metal shell of shear action not shown in the diagram.An important architectural feature is: the helical duct of separating in a certain distance apart from one another, and its average distance is approximately identical with the spiral fluted width, the spiral fluted width reduces gradually, and in the corresponding increase of the cylindrical space of centre or broaden; The spiral fluted both sides are by edge limited, and lower edge (respectively downwards near cylinder surfaces) has skew slightly with respect to upper limb.

The cross section of foraminous spiral tract is half circle in starting point at least, and this cross section shoals gradually, and promptly the degree of depth reduces gradually.

Fig. 3 has illustrated that clearly central shaft is to feeding and tributary distribution condition by three strands of different main flow directions 3 foraminous spiral tract distributors (three layers of extruding simultaneously) feeding.The flox condition of having only the equal rheology of all plastic pellets in each tributary that this layout could guarantee to separate.

In order not end at the material accumulating head that needn't be provided with oversizely,, carry through radial hole 32 (main flow) from extruder and to melt the attitude plastics and be preferably in towards that side of injection ram 16 and carry out at least one axial hole 22.Like this, the attitude plastics that melt in the centre bore 22 are directed with the flow direction consistent with injection direction.

Centre bore 22 ' at top and radial hole 30 ' be connected, radial hole 30 ' through hollow pushing bolt 18 ' with overcoat 44 (having represented a part among the figure) on foraminous spiral tract distributor 20 " (having 6 foraminous spiral tracts that separate) communicates.(nozzle bore 24 does not illustrate in the drawings with the nozzle ring 26 with annulus 28).From 3 hollow pushing bolts 18 ' the tributary of feed orifice 38 ' draw at feeder sleeve 52 ' locate separately once, and can feeding in two adjacent foraminous spiral tracts.

Expression further feature of the present invention in Fig. 3 is in other words as the hollow pushing bolt 18 of feeder sleeve with inject connection between the cylinder top and be designed to the bullet-shaped jockey be made up of bullet 48 and bullet lining 50.

Bullet 48 is made in the bottom of pushing bolt 18, and has corresponding bullet lining 50 at injection cylinder top.This in principle layout can otherwise realize.The present invention with a kind of simple method balance between the case member of movable long pushing bolt and adjacent piston and external stability tolerance and eliminated thermal stress between them.Because pushing bolt 18 mainly only bears pressure load,, injects on the cylinder by the bullet 48 of pushing bolt so being fixed to simply by half peviform circular piece.For multilayer extrusion head simultaneously, the foraminous spiral tract of at least two adjacent dispenser parts are the outer and inverse clocks of up time around.

Like this, juxtaposition can increase the intensity of separating layer, for example resists the intensity of the inner pressuring load in the moulding hollow body.

Material accumulating head top in Fig. 4 presentation graphs 3 is along the cross section of A-B-C-D planar interception.The attitude plastics that melt that come out from extruder are introduced in the axial hole 22 on the axle 12 by feed orifice 32 radially.Axial hole 22 should have 3 times the feature that its length equals its diameter, with balance by the caused pressure of the skew in hole 32.The tributary is led to 6 grooves 34 in the pushing bolt 18 through radial hole 30 from axial hole 32, and leads in the foraminous spiral tract of separating through pushing bolt 18 endoporus 38 therefrom.In the accompanying drawing, each pushes bolt 18 and is all shown.

Fig. 5 has shown along the cross section of Fig. 3 midplane E-F-G-H intercepting.Here, from the stream of plastic of extruder by feed orifice 32 ' arrival axial hole 22 radially ' the bottom, and upwards flow through with axial hole 22 ' the radial hole 30 that links of top ', through the hollow pushing bolt 18 of groove 34 ' enter '.From pushing bolt 38 ' to the feeder sleeve 52 that injects cylinder 14 ' mobile proceed and through the bullet jockey 48 described ', 50 '.3 supply pipes are divided once to pitch and be passed in 6 foraminous spiral tracts.The left part of Fig. 5 represents to push the feed orifice 38 in the bolt 18, and the groove 34 that half expression of the right has been cut.

Represented among Fig. 6 along the cross section (see figure 3) of planar I-J-K-L planar interception.On a figure left side half side see adjacent have its feed orifice 38,38 ' pushing

bolt

18,18 '.By the 3rd extruder through radial hole 32 " to axial hole 22 " feeding, and through thinner radial hole 30 " and the cannelure 34 of axle in 12 ' be assigned in the foraminous spiral tract that separates of inside spin channel distributor 20.

Fig. 7 represents the material accumulating head shell 10 with one deck material accumulating head of foraminous spiral tract, overcoat 14 ' and by concentric cover 44 ' and 42 ' form.In cover 42 ' on its outer surface the helical duct 20 of foraminous spiral tract distributor is arranged, and represented the helical duct degree of depth reduce cause overlapping 44 ' and 42 ' between the space broaden.For the purpose of moving, cover 44 ' and 42 ' combine massively.In material accumulating head shell wall 10, be provided with two or four holes 54 radially, relative to one another and be connected at least one extruder through suitable pipeline.Accompanying drawing has been represented the injection cylinder of position at an upper portion thereof, it have be positioned at overcoat 44 ' on cannelure 40, the bottom of groove 40 directly feeds in the radial hole 54 in the material accumulating head shell wall 10.The length of cannelure 40 is approximately equal to the injection stroke length of injecting cylinder 14.The upper end of cannelure 40 at its minimum injection position, almost directly is positioned at radial hole 54 front portions.Melt the attitude plastics from extruder upwards flow by hole 54 and cannelure 40 and in radial hole arrives, overlap 42 ' on the foraminous spiral tract distributor.From here can be directly to a helical duct feed or simultaneously by horizontally separated and define the passage in boundary line to two helical duct feed in the direction of wall.Then, main flow is made helical flow in the foraminous spiral tract that separates, thereby side by side and gradually makes partly plastic be deposited on the formwork surface with the form of stack shell in the axial direction with increasing.At last, evenly the synthetic of diffusion cover 44 ' and 42 ' between from the foraminous spiral tract distributor, flow out into to be positioned to inject and hold material space 16 below the cylinder 14.A cleaning hook 58 that is fixed on the shell wall 10 can be arranged on the place that cannelure 40 is lower than radial hole, except continuous melting the attitude stream, prevent that plastics are trapped in the following cannelure in hole 54, and only when material space is held in filling, just inject next time.

As improvement of the present invention, cannelure 40 also is suitable for being applied on the inwall of material accumulating head shell 10, therefore melts the attitude plastics and arrives helical duct or foraminous spiral tract distributor by overcoat 44 ' interior hole.20 of the helical ducts of foraminous spiral tract distributor also can be applied to overcoat 44 ' cylindrical form interior surface.

Another embodiment of the invention also can be imagined, promptly carry and melt attitude plastics (for example by which is provided with the axle 12 that injects cylinder 14) by the center, further carry with the cannelure that links to each other through radial hole then, compensated the effect of injecting the foraminous spiral tract distributor in the cylinder simultaneously.

Similarly, also can interior cover 42 ' outer wall in be provided with spiral distributor helical duct and correspondingly also be arranged on overcoat 44 ' inwall on.From the angle of producing, overcoat 44 ' be made up of two halves will be favourable.

Importantly make helical duct separately apart from one another by an axial width that approximates the helicla flute width greatly, and the spiral fluted width is reduced gradually, thereby make in the corresponding increase of the cylindrical space of centre.Helicla flute is in that side by clear and definite edge limited; Therefore, bounce back a little on the subsurface base of adjacent column, the synthetic that melts attitude like this can flow in the cylindrical space from helicla flute.

Shown in several devices in some features can carry out conversion on demand.

These devices of the present invention promptly to have the Storage appts. that the foraminous spiral tract distributor is a feature, can be made the synthetic hollow body that product quality improves to some extent under the prerequisite of boosting productivity.

Claims

1. one kind in order to the material accumulating head of the injection machine of processing plastic hollow body off and on, have at least one and link to each other with the material accumulating head shell and carry that one melts the extruder of attitude plastics at least to material accumulating head, what this material accumulating head had that an axle that is located at the centre and form with the foraminous spiral tract distributor surround this with one heart is used to distribute the dispenser device that melts the attitude plastics, this melt the attitude plastics by a circular surface and be fed to can be in the material accumulating head shell the annular bin stock space below the axially movable injection cylinder, and by being positioned at ring exit seam injection off and near lower end, bin stock space, it is characterized in that injecting cylinder (14) and comprise at least two cylindrical sleeve (42,44), the helical duct of foraminous spiral tract distributor (20) is positioned on the outer wall of cover, and the inwall by overcoat (42) covers, like this, for outpouring, on the front side of injecting cylinder (14), be provided with annulus by the savings plastics that periphery is assigned in the bin stock space (16).

2. according to the material accumulating head of claim 1, the overcoat and/or the interior cover section (42,44) that it is characterized in that injecting cylinder (14) are to be made of two parts.

3. according to the material accumulating head of claim 2, the overcoat and/or the interior cover section (42,44) that it is characterized in that injecting cylinder (14) are to be made of two and half shells.

4. according to the material accumulating head of claim 1, it is characterized in that carrying to the helical duct of foraminous spiral tract distributor (20) through at least one cannelure (40) approximately identical with the helical duct capacity and melt the attitude plastics, this helical duct is regulated from come out radial hole (32) in a material accumulating head shell (10) of extruder and is flowed to the plastic flow of helical duct.

5. according to the material accumulating head of claim 1, it is characterized in that the equal diameters in the cross section of the axial length of any one distributor (20) and the recessed cover that helical duct arranged, at least two or more foraminous spiral tract are located at the surface of distributor (20) equably.

6. according to the material accumulating head of claim 1, it is characterized in that the equal diameters in the cross section of the length of separated foraminous spiral tract longitudinally and the recessed cover that helical duct arranged, at least two or more foraminous spiral tract are located at the surface of distributor (20) equably.

7. according to the material accumulating head of claim 1, it is characterized in that foraminous spiral tract separately is spaced from each other certain distance, therefore its average distance is the axial width identical with the helicla flute width approximately, the spiral fluted width reduces gradually, and the corresponding increase of annular space therebetween or broaden, thereby the spiral fluted side limits by edge and root edge, perhaps the lower cylindrical surface relatively upper limb always bounce back a little.

8. according to the material accumulating head of claim 1, it is characterized in that foraminous spiral tract is a hemicycle in the cross section of section start at least, and along with the extension of passage, it becomes more and more shallow, and the degree of depth of helical duct reduces gradually.

9. material accumulating head that is used for batch processed laminated plastics hollow body, having at least two links to each other with material accumulating head shell (10), be used for melting the extruder that the attitude plastics are delivered to material accumulating head with at least two strands, this material accumulating head has axle (12) and at least two separate dispenser devices that a center is provided with, this dispenser device surrounds axle (12) with one heart and melts the attitude plastics with what hold diffusion, be entered into the annular bin stock space (16) of injecting cylinder (14) below then, this injects cylinder (14) and can slide vertically in material accumulating head shell (10) by pushing bolt (18), and the injection bin stock space, annulus (28) (16) by being positioned at bin stock space (16) bottom melt the attitude plastics, it is characterized in that, inject cylinder (14) and comprise at least two concentric covers (42,44,46), and each cover (42,44,46) all have the such feature of separated distributor, distributor is designed to cylindrical shape foraminous spiral tract distributor (20).

10. according to the material accumulating head of claim 9, it is characterized in that the equal diameters in the cross section of the axial length of any one distributor (20) and the recessed cover that helical duct arranged, at least two or more foraminous spiral tract are located at the surface of distributor (20) equably.

11. according to the material accumulating head of claim 9, it is characterized in that the equal diameters in the cross section of the length of separated foraminous spiral tract longitudinally and the recessed cover that helical duct arranged, at least two or more foraminous spiral tract are located at the surface of distributor (20) equably.

12. material accumulating head according to claim 9, it is characterized in that foraminous spiral tract separately is spaced from each other certain distance, therefore its average distance is the axial width identical with the helicla flute width approximately, the spiral fluted width reduces gradually, and the corresponding increase of annular space therebetween or broaden, thereby the spiral fluted side limits by edge and root edge, perhaps the lower cylindrical surface relatively upper limb always bounce back a little.

13. according to the material accumulating head of claim 9, it is characterized in that foraminous spiral tract is a hemicycle in the cross section of section start at least, and along with the extension of passage, it becomes more and more shallow, and the degree of depth of helical duct reduces gradually.

14. material accumulating head according to claim 9, it is characterized in that from the stream of plastic of separating of two extruders at least through being that radially hole (32) enters in the axle (12) basically, further be transferred by the axial hole (22) in the axle (12) then, the radial hole (30) (tributary) of the star arrangement through being connected with central axial bore (22) will melt the attitude plastic conveying and plastic in the foraminous spiral tract that separates again.

15. according to the material accumulating head of claim 14, the length that it is characterized in that being arranged on along the center axial hole (22) in the axle (12) is at least 1 times of the own diameter in hole (22).

16. according to the material accumulating head of claim 14, the length that it is characterized in that being arranged on along the center axial hole (22) in the axle (12) is 3 times of the own diameter in hole (22).

17. material accumulating head according to claim 14, it is characterized in that at least one centre bore (22), the attitude plastics that melt from extruder are sent to that side of facing injection cylinder (14) and being connected with radial hole (30) through radial hole (32) (main flow), radial hole (30) is leading on the foraminous spiral tract away from that side of injecting cylinder (14), and therefore the flow direction that melts the attitude plastics in centre bore (22) is opposite with injection direction.

18., it is characterized in that at least one is arranged in the pushing bolt (18) that injects cylinder (14) top and is hollow and is used for being incorporated into dispenser device (20) with melting the attitude plastics according to each material accumulating head among the claim 9-17.

19., it is characterized in that the bullet-shaped jockey of be designed to have bullet (48) and bullet lining (50) according to the material accumulating head of claim 18 as being connected between the hollow pushing bolt (18) of plastics feeder sleeve and the top of injecting cylinder (14).

20. according to each material accumulating head among the claim 9-17, it is characterized in that the adjacent dispenser device that has foraminous spiral tract at least two, the bearing of trend around direction or spiral of foraminous spiral tract is arranged to clockwise direction and anticlockwise different directions.

21., it is characterized in that the dispenser device with foraminous spiral tract is used to produce each layer of preformed member in order to make the laminated plastics body according to each material accumulating head among the claim 9-17, it is by two extruders feed at least, therefore injecting cylinder (14) is made up of multipart concentric circles jacket casing (42,44,46), the cylindrical sleeve (42 of separating, a foraminous spiral tract distributor (20) is set 44,46), and its foraminous spiral tract is recessed at each cover (42,44,46) in the outer wall.