DE1720981U - EXTRUSION DEVICE. - Google Patents

Description

_n , 39a, 14. 17209Sl. Abraham Shanok. Γ / Victor Shanok and Jesse Shanok. Brook- '· «' lyn (V. St. Α.); Representative: Dr.-Ing. K. Boeh-

PATENTANWÄLTE - * "' ^T » »-. ■ · - ■ · ¹ ^

DR. ING. KARL BOEHMERT ♦ DSPL-INC 4. 8. 55 s 17754. V ⁸¹ St v. America

BREMEN. FELDSTRASSE 24 FER. - ¹ :. ^{4: 55} · J ¹ J ⁶ L - J)?

File number, S 17 754 / 39a Ga Bremen, January 23, 1956

Name d. Note

My sign: ⁵

Abraham Shanok, Viotor Shanok and Jesse Shanok, Brooklyn, New York State (V.St.A.).

Extrusion device.

The invention relates to plastic coated flexible strips, tapes, sheets, and the like. and particularly relates to an extrusion molding machine used in the manufacture of such components.

One problem that is difficult to solve is the manufacture of plastic-wrapped thin flexible strips in keeping the strip in a non-flexed state when it is coated with plastic. The strip bends when coated, the plastic layer becomes uneven, the finished product wrinkles and that coating of the strip in the usual extrusion die is hindered, so that an inferior object is produced. Since the plastic is in the liquid state on the

39a, 14. 1720 9Sl. Abraham Shanok, Victor Shanok and Jesse Shanok. Brooklyn (V. St. A.); Representative: Dr.-Ing. K. Boehmert, Dipl.-Ing. A. Boehmert, patient attorneys, Bremen. | Extrusion device. 4. 8. 55. S 17 734. V. St. v. America 1. 4. 55. (T. 16; line 1)

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Strip is applied, is in the presence of a printing difference in the the exposed strip portion the surrounding zone of the strips bent laterally, so that the defects mentioned arise.

Synthetic resins such as vinyl chloride, acetyl cellulose butyrate, and the like suffer deterioration when their flow rate is delayed in an extruder. The stale The material takes on a darker color than the material that the extrusion machine is made of at the usual pleating speed flows through, so that the finished product has unsightly streaks. It is therefore necessary that the extruder and the working process produce a uniform steady flow of the plastic, bo that such disadvantages are prevented.

In the devices in which the plastic is fed transversely to the longitudinal axis of the strip, occur frequently Pressure gradient and delays in the longitudinal movement of the plastic stream. Such devices with cross feed however, they are commonly used because these devices are compact in construction, less intricate and are easier to use than other devices. For best results, you need a Extrusion device in which the plastic is fed in in the transverse direction, the direction of the plastic flow change it prior to its contact with the flexible strip so that the flow line is substantially parallel

Victor Shanok and Jesse Shanok, Brooklyn (V. St. Α.); Representative: Dr.-Ing. K. Boeh- 26, APR. 1951 m «rt, Dipl.-Ing. A. Boehmert, Pat. Lawyers, Bremen. | Extrusion device. 4. 8. 55. S 17 754. V. St. v. America 1. 4. 55. (T. 16; line 1)

to the axis of the strip without delay takes place in the flow rate of the stream.

Has the inclusion of air bubbles in the plastic flow also result in unsightly and uneven settling of plastic. If the current is swirling strongly Air drawn into the extruder. The flow path must therefore be specially designed to prevent the occurrence of eddies in the event of sudden changes in the flow B direction or in the event of changes in the cross-section of the flow area to prevent.

The invention therefore aims to provide an extrusion apparatus which comprises a thin, flexible strip of material in a plastic sleeve or in a plastic housing of a predetermined shape, the shell having a uniform cross-sectional size, density and color, and the longitudinal axis of the strip is substantially a straight line.

Further aims of the invention are:

One for applying a plastic coating extrusion molding apparatus defining a flexible strip of material in which the plastic is deposited on the strip even pressure directed across the stripe axis is applied and the entire flow of plastic flows through the device with the same amount and no air bubbles contains, in addition, a rather large strand

39a, 14. 1720981. Abraham Shanok, Victor Shanok and Jesse Shanok. Brooklyn (V. St. A.); Representative: Dr.-Ing. K. Boehmert, Dipl.-Ing. A. Boehmert, patient attorneys, Bremen. | Extrusion molding machine. 4. 8. 55. S 17 734. V. Si. ν. America 1. 4. 55. (T. 16; line 1)

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Pressing speed is obtained.

A bum applying a plastic coating to it a flexible metal strip certain extrusion device, in which the plastic first in the transverse direction to The longitudinal axis of the strip is fed and the fabric is then swung just before it comes into contact with the strip to flow in a flow path running parallel to the streak ache, so that a plastic coating uniform color, uniform cross-section and uniform density.

This is an extrusion device of the type mentioned, in which the pressure cannot exceed a certain maximum value and in which the plastic has a relatively narrow length of the flexible strip prior to its passage through touches an extrusion nozzle.

A flexible strip of material that is wrapped in a plastic sleeve uniform cross-section, uniform color and uniform lightness is included and the one predetermined Has shape.

Further objects and advantages of the invention emerge from the description with reference to the drawings.

In the drawings is

Fig. 1 shows a longitudinal section through the extruder with

the location of the flexible strip with respect to the cylinder and crosshead;

39a, 14. 1720981. Abraham Shanok, Victor Shanok and Jesse Shanok, Brooklyn (V. St. A.); Representative: Dr.-Ing. K. Boehrnert, Dipl.-Ing. A. Boehmert, patient attorneys, Bremen. | Extrusion device. 4. 8. 55. S 17 754. V. St. v. America 1. 4. 55. (T. 16; line 1)

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Pig. 2 a section through the crosshead near the line 2-2 the Pig. Ij

Pig. 3 a cross section along line 3-3 of the pig. I of the finished coated plastic strip;

Pig. 4 a the pig. 1 corresponding longitudinal section,

in which, however, the one enclosing the flexible strip and feeding guide tube is not shown in section;

Pig. 5 a graphical representation of the coated

flexible strip as it emerges from the nozzle, and

Pig. 6 is a top pictorial view of a covered one Strip of a different shape when emerging from a correspondingly modified nozzle.

The extruder 10 (Fig. 1) has a cylinder 11, in which a putter 12 with breaker plate 13 is attached is. Liquid plastic compound is placed under pressure in the chuck 12 by means of the usual pressure spindle (not shown) pressed forward. Since the liquid plastic mass, the narrowed passages presented by the sub-screed plate 13 must pass through, air bubbles and other foreign matter possibly contained in the stream become essentially eliminated and the Hasse fed into the press head in an appropriate form.

Sine located near the head end 13 of the cylinder 11 Circumferential shoulder 14 works with a similarly shaped Surface 16 of a clamping ring ο 17 for fixing together. Sin crosshead 18 with inlet end 19 connects to the head end 15 and has a circumferential shoulder that is also conical 20, which cooperates with a corresponding surface 21 of the clamping ring 17. That way are

39a, 14. 1720981. Abraham Shanok, Victor Shanok and Jesse Shanok. Brooklyn (V. St. A.); Representative: Dr.-Ing. K. Boehmcrt, Dipl.-Ing. A. Boehmert, Pat. Attorneys. Bremen. I Strar press device R. 4. 8. 55. S 17 754. V7 "St. V. America - 6 - I- * ■ 55. (T. 16; line 1)

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the head end 15 of the cylinder 11 and the cross head 18 are jointly connected to the clamping ring 17, whose inclined surfaces 16 and 21, which travel against one another, rest on the adjacent inclined surfaces of the shoulders 14 and 20, respectively.

The cross head 18 has a central bore 22 axially aligned with the cylinder 11. The upstream end of the Bore 22 is conical and runs from one to the Interrupter plate 13 adjacent larger diameter to a uniform passage 23 of smaller diameter. The passage 23 cuts a longitudinal bore 24 of variable contour, one for supplying the flexible strip material serving guide 25 takes up.

Rae the outer surface of the inlet end 19 is an out-hole 27 present in which the putter 12 fits tightly. An annular shoulder 28 intersecting the bore 27 forms a support surface for the inner end face of the interrupter plate 13. enn the clamping ring 17 the cylinder 11 to the cross head 18 presses, the breaker plate 13 lies length of the shoulder 28 close to the crosshead 18.

A paddock 29 with a central bead 30 forms one External support for the guide tube 25 passing through the bore 30. The outer end of the guide tube 25 has external threads, on which nuts 31 and 32 are screwed at a distance, which are adjustable on both sides of the flange 29 (Pig * 4) issue. The inner nut 32 is put on and handled via a housing wall of the

39a, 14. 1720981. Abraham Shanok. Victor Shanok and Jesse Shanok. Brooklyn (V. St. A.); Representative: Dr.-Ing. K. Boehnrert, Dipl.-Ing. A. Boehmert, patient attorneys, Bremen. | Extrusion device. 4. 8. 55. S 17 734. V. St. v. America 1.4. 55. (T. 16; line 1)

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Crosshead 18 penetrating transverse slot 33. if that Guide tube 25 is inserted into the bore 30, the nuts 31 and 32 are screwed along the guide tube a 25, so that they apply sioh to the opposite sides of the flange 29 and thereby the guide tube 25 in the Define the housing.

Inwardly of the slot 33, the bore 24 has an annular recess 34 which extends axially to the bore 22 and to which a conical recess 35 adjoins which lies under the bore 22. The section 35 runs conically inwards to a bore section 36 of smaller diameter, which is located near a nozzle plate 37. With the exception of the tip section belonging to the guide tube 25, which is close to the bore section 36 with a smaller diameter, the outer surface of the guide tube 25 corresponds to the corresponding sections of the bore 24. The tip 38 of the guide tube 25, which is surrounded by the bore section 36, has a hollow, conical transition section, which merges conically from a large annular section 39 to a substantially rectangular section 39a. The outer surface of Führungsrohrea 25 located within the section 39, as the shaded area of FIG. 4 shows _t radially inwardly recessed, so that between the guide tube 25 and Kreuzkopfabsehnitt 35 enbteht a flow passage 40. The channel 40 changes uniformly in cross section from a proportionally

39a, 14. 1720 9Sl. Abraham Shanok.

Victor Shanok and Jesse Shanok, Brooklyn (V. St. A.); Representative: Dr.-Ing. K. Boehmert, Dipl.-Ing. A. Boehmert, patient attorneys, Bremen. | Extrusion device. 4. 8. 55. S 17 754. V. St. v. America

'■; ^{L4 55.} (I ¹ ^ ^{2 1} I - 8 -

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A moderately large cross-section 41 »which directly adjoins the Bore 22 adjoins, to a comparatively greatly reduced size Cross-section 42, whereupon the cross-section of the channel 40 widens again to a maximum cross-section 43. The channel 40 is in communication with the chamber 45 surrounding the head 38 on that part of the longe which is in connection with the position corresponds to line 44.

The tip 38 of the guide tube 25 ends with a small one Longitudinal distance from the inner wall of the nozzle plate 371 'so that only a small exposed length 46 of the flexible strip 26 with the flow of plastic flowing in the chamber 45 can come into contact.

The nozzle plate 37 consists of a block with a conical extrusion orifice 47 in the center, as desired Cross-sectional. The nozzle plate 37 forms an outlet end cover for the bore 24. The extrusion opening 47 corresponds in shape to the strip 26 and is somewhat larger in cross section, so that there is a space for the Passage of the extruded plastic is present. In the pig. 5 and 6 are extrusion orifices different Shapes shown, however, these illustrations are not intended to limit the invention as the respective customary form is not essential to the invention.

With the axis of the bore 22 is aligned with an air hole 48, which is in communication with the bore 24 and via the one Excessively high pressure generated in the plastic mold for

39a, 14. 1720981. Abraham Shanok. Victor Shanok and Jesse Shanok. Brooklyn (V. St. A.); Representative: Dr.-Ing. K. Boehnwrt, Dipl.-Ing. A. Boehmert, Pat. Lawyers, Bremen. | Extrusion device. 4. 8. 55. S 17 754. V. St. ν. America

26th APR. 19 »

Outside air is discharged. The size of the air hole 48 can be reduced by inserting appropriately sized plugs with narrowed axial openings. The pressure relief height can also be done by adjusting the guide tube 25 in the bore by means of the nuts 31 and 32 24 can be changed, the distance between the outer circumferential wall of the pipe and the inner wall surface the bore 24 is adjusted.

Pas guide tube 25 limits the contact between the Kunststoffetrom and the strip 26 on the very short ones Absohnitt 46. When moving the strip 26 in the guide tube No external pressures are placed on the strip and the strip becomes more straight and unbent Position held. The head 38 of the guide tube 25 (Fig. 1) is shaped so that the desired shape of the Strip is maintained during its advance. At the The strip 26 therefore has to leave the guide tube 25 the shape required to accommodate the plastic coating.

The 90 degree change of direction out of the hole 22 to chamber 45 is progressing gradually so that there are no dead spots in which the plastic material is retained there are still harmful eddies. Since the flow channel 40 is in the vicinity of the 90 degrees Direction bends SQ / is narrowed to a small cross-section the speed of the material flow increases, whereby a Retention of plastic particles is further prevented.

39a, 14. 17209S1. Abraham Shanok, Victor Shanok and Jesse Shanok, Brooklyn (V. St. Α.); Representative: Dr.-Ing. K. Boehmert, Dipl.-Ing. A. Boehmert, patient attorneys, Bremen. | Extrusion device. 4. 8. 55. S 17 754. V. St. v. America 1. 4. 55. (T. 16; Z., 1)

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The enlarged space formed by the chamber 45 slows down the flow rate to a value comparable to the feed rate and gives one completely free-flowing stream of plastic which can be pressed out of the nozzle opening 47. As a result of the streamlined shape of the pipe head 38, the vortex caused by the expansion of the flow surface is reduced to a Yes at least reduced. It is also in the plastic material near the cut parts of the nozzle plate 37 with the bore 24 located in the chamber 45 creates a spiral effect that causes a uniform settling the strip 26 causes.

During operation, the guide tube 25 is first inserted into the bore 24 of the cross head 18 and is then fastened to the cross head flange 29 by means of the nuts 31 and 32. The strip 26 is then advanced in the guide tube 25 by means of a conventional feed device (not shown) and emerges from the guide tube tip 38 shortly before the passage through the aligned nozzle opening 47. The strip 26 is preformed to have a shape that is similar to the nozzle shape. The strip 26 in the guide tube 25 maintains this shape. During the preheating of the strips in the guide tube 25, liquid plastic is advanced in the feed 12 under pressure by means of conventional devices (not shown). As a result of the streamlined flow generated by the canal 40 and head 38, a

39a, 14. 1720981. Abraham Shanok, Victor Shanok and Jesse Shanok. Brooklyn (V. St. A.) Sales: Dr.-Ing K. Boehrnert, Dipl.-Ing. A. Boehmert, Pat. Lawyers, Bremen. | Extrusion device. 4. 8. 55. S 17754. V. St. v. America - 11 - 1.4.55. (T. 16; line 1)

26th APR. 1958

Shaped layer of pure plastic on the exposed Perimeter section 46 of the strip 26 is set off. Since this Deposition is caused by a longitudinal flow evenly distributed around the circumference of the strip canceled, which could bend the strip 26. This effect, along with the very brief unsupported Strip section 46, which is the spiral action of the plastic Stromes is exposed, makes it impossible for the strip 26 to be bent, folded or otherwise in its place Shape is changed.

When passing through the nozzle opening 47, the plastic is in the Pig. 5 and 6 final shape shown shaped and hardened.

With the device described is the complete wrapping of strip material, for example foils, fabric, paper etc., possible that with the usual coating process with the Conventional devices buckle, break, fold or otherwise deform. Metal foils of one thickness of 0.05 mm can be easily enveloped. For example, an aluminum foil of about 0.05 mm Dioke can easily be in a shell made of acetylcellulose or acetylcellulose butyrate be enveloped in light form to form a solid body To form strip material that gives the appearance a chrome plated Strip has. The covering material or the casing shell forms a coherent and adhesive one Covering that seals the metal foil and prevents its destruction or corrosion. The invention also enables

39a, 14. 1720 9Sl. Abraham Shanok, Victor Shanok, and Jesse Shanok, Brooklyn (V. St. A.); Representative: Dr.-Ing. K. Boeh- 26, APR. 195J mert, Dipl.-Ing. A. Boehmert, Pat. Lawyers, Bremen. | Extrusion molding machine. 4. 8. 55. S 17 754. V. St. v. America 1. 4. 55. (T. 16; Z. J)

the manufacture of many shaped strips, the numerous Find applications as cover strips, decorative strips or as decorative and structural components. With the invention Furthermore, electrical conductors can be made from thin strip material which have an insulating coating have, in which several such strips are embedded at a distance from one another and isolated from one another, to thereby produce multiple conductors in a single piece of strip.

Although a preferred embodiment is shown and described, However, the invention is not limited to this embodiment, but many other changes can be made. Additions and modifications can be made in connection with the illustrated version, without the area and to leave the scope of the invention.

Claims (1)

3SS rS ST SSSj 1 · Strass press device for wrapping a thin strip made of / flexible material with plastic, marked through a cross head (18) with an inlet (22, 23) for receiving the liquid plastic; through an inner passage (24), which communicates with the inlet (22, 23) a nozzle opening (47) »the one with the passage (24) is in communication; and by a device (25) »which a thin strip of material (26) over a portion of the passage (24) and the nozzle opening (47) leads, wherein a device (38) is present, the contact between the plastic and the strip (26) limited to a relatively short strip length (46). 2. Device according to claim 1, characterized in that that part of the passage (24) is at right angles to the inlet a lies. 26th 39a, 14. 17209S1. Äbrahani Shanok, Victor Shanok and Jesse Shanok, Brooklyn (V. St. A.); Representative: Dr.-Ing. K- Boehnrert, Dipl.-Ing. A. Boehmert ,; _; Pat. Attorneys, Bremen. | Extrusion device. 4. 8. 55. S 17754. V. St. v. America 1.4. 55 ^ JTJlOrZ ₁ 1) 26, APR. 1958 Device according to claim 1 or 2, characterized in that that the guide device for the strip (25) consists of a tube (25), which the strip (26) surrounds, which also penetrates a part of the passage (24) and located in the vicinity of the bushing opening (47) Head (38) ends. 4. Apparatus according to claim 3 _t characterized in that the drilling (25) comprises a device which gives the strip a vorbestiminte Fora. 5. Apparatus according to claim 4 »characterized in that the tube (25) has a portion that tightly into the Passage (24) fits, and that the pipe (? 5) on its Has a flow channel (40) on the outside, which with the inlet (22, 23) and the nozzle opening (47) in connection stands, wherein αer channel (40) a change in the direction of flow of the artificial flow caused by 90 degrees. 6. The device according to claim 5 »characterized in that the passage is a transverse bore (24); that this Tube (25) is fastened in this transverse bore (24); that the sweet opening (47) is arranged in a püsero? ancl (37) which is perpendicular to the bore (24) and is aligned and connected to the bore (24); thatB that Tube (25) has a conical head (38) which the Contains <3 thin strip guide device (26); that the flow channel (40) between the Hohr (25) and the bore (24) is arranged to establish a connection between 39a, 14. 1720 9Sl. Abraham Shanok, Victor Shanok and Jesse Shanok, Brooklyn (V. SfA.); Representative: Dr.-Ing. K. Boehmert, Dipl.-Ing. A. Boehmert, patient attorneys, Bremen. | Extrusion device. 4. 8. 55. S 17 734. V. St. v. America 1.4. 55. (T. 16; line 1) 26th APR. 19 » to establish the inlet (22, 23) and the nozzle opening (47), and that the kege If oral ge head (3δ) has a small distance from the nozzle wall (37). 7. Device according to claim 6, characterized in that that the flow channel (40) its direction from the inlet (22, 23) gradually changes to the nozzle opening (47) and at the point of its greatest curvature a flow & subsides (42). 8 · Device according to claim 6 or 7, characterized through an air hole (48) which is in communication with the bore (24). 9. Device according to claims 6 to ß, characterized by a device (31 »32) which is used to adjust the Abutandeß between the conical head ('S) and the nozzle opening (47) is used. 10. Device according to claims 6 to 9, characterized in that that the flow channel (40) its direction gradually changes from the inlet to the nozzle opening (47) and that the conical head (38) has an enlarged chamber (45) around the head (38) and between the flow channel (40) and wall (37) lies. 11. Flexible strip-shaped, provided with a plastic cover Material marked duroh one made of translucent Plastic of uniform color and density 39a, 14. 1720 9Sl. Abraham Shanok, Victor Shanok and Jesse Shanok, Brooklyn (V St Α.); Representative: Dr.-Ing. K. Boeh- 26.APR.195i mtrt, Dipl.-Ing. A. Boehmert, Pat. Lawyers, Bremen. | Extrusion device. 4. 8. 55. S 17 754. V. St. v. America 1. 4. 55. (T._16; _Z. 1) upright plastic casing of uniform cross-section, which is attached to a strip formed from a metal foil 12 · Flexible strip-shaped with a plastic cover Material, characterized in that the plastic sleeve adheres to the strip. 13. Strip-shaped material na.ch claim 11 or 12, characterized by a sleeve made of plastic, which is applied to the strip as it passes through an extrusion nozzle the strip is made at right angles to the direction of movement of the strip prior to its passage through the nozzle. 14 strip-shaped material according to claim 11 to 13, characterized by several at a distance from each other in the Plastic sleeve arranged strips.