GB2154932A - Apparatus for regulating the flow of a plastics layer in laminated plastics ribbon extrusion - Google Patents

Apparatus for regulating the flow of a plastics layer in laminated plastics ribbon extrusion Download PDF

Info

Publication number
GB2154932A
GB2154932A GB08502063A GB8502063A GB2154932A GB 2154932 A GB2154932 A GB 2154932A GB 08502063 A GB08502063 A GB 08502063A GB 8502063 A GB8502063 A GB 8502063A GB 2154932 A GB2154932 A GB 2154932A
Authority
GB
United Kingdom
Prior art keywords
channel
plastics
entry
composing
entry channel
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
GB08502063A
Other versions
GB8502063D0 (en
GB2154932B (en
Inventor
Hugo Schmettkamp
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Original Assignee
Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Reifenhaeuser GmbH and Co KG Maschinenenfabrik filed Critical Reifenhaeuser GmbH and Co KG Maschinenenfabrik
Publication of GB8502063D0 publication Critical patent/GB8502063D0/en
Publication of GB2154932A publication Critical patent/GB2154932A/en
Application granted granted Critical
Publication of GB2154932B publication Critical patent/GB2154932B/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels
    • B29C48/08—Flat, e.g. panels flexible, e.g. films
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/255—Flow control means, e.g. valves
    • B29C48/2556—Flow control means, e.g. valves provided in or in the proximity of dies
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
    • B29C48/307—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets specially adapted for bringing together components, e.g. melts within the die
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/30—Extrusion nozzles or dies
    • B29C48/305—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets
    • B29C48/31—Extrusion nozzles or dies having a wide opening, e.g. for forming sheets being adjustable, i.e. having adjustable exit sections
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
    • B29C48/49—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using two or more extruders to feed one die or nozzle
    • B29C48/495—Feed-blocks
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/07—Flat, e.g. panels

Abstract

The apparatus comprises a collecting block (1) for the different plastics streams which are to form the layers, a reforming unit (2), and a wide-slit nozzle (3) through which the laminated plastics ribbon emerges, the block (1) having a collecting channel (4) for the streams of plastics from different worm extruders. The channel (4) has a substantially rectangular cross-section with corner fillets (5) and is connected at its upstream end to a coaxially feed channel (6) from a first plastics worm extruder, and at least one entry channel (7) connected to another plastics worm extruder is disposed downstream of the feed channel (6) and extends over one side (15) of the channel (4). A flow control pin (10) is rotatably disposed in a cylindrical hole (9) opening in to the path of the entry channel (7), and projects into and extends across the entry channel, and has a variable profile (Fig. 3 not shown) around its periphery so that the entry channel section (7) can be adjusted upon rotation of the pin (14). <IMAGE>

Description

SPECIFICATION Equipment for continuous extrusion of laminated plastic ribbon This invention relates to equipment for continuous extrusion of laminated plastics ribbon with the aid of at least two plastics worm extruders, a collecting block, a reforming unit, and a wide-slit nozzle through which the laminated plastics ribbon emerges, the collecting block having a composing channel to which the plastics worm extruders are connected and which is connected through the reforming unit to the wide-slit nozzle. The term "collecting block" expresses the fact that two or more thermoplasticised plastics streams are brought together in the block and united layer on layer in the composing channel. The arrangement and general layout are such that the plurality of layers of thermoplasticised plastics material do not comingle on their way to the wide-slit nozzle.In other words, the reforming unit brings the plurality of streams initially entering the composing channel into a single stream of thermoplasticised plastics material of the form required in the plastics ribbon emerging from the wide-slit nozzle. The term "plastics ribbon" covers foil-like and slablike plastics formations.
In known equipment (DE-AS 1 5 04 1 90), the composing channel lies between two feed channels. It leads into a wide-slit nozzle which extends over the length of the composing channel and forms as it were the entrance to the reforming unit to which the wide-slit nozzle first mentioned is connected. The two feed channels are oriented at right angles one to the other. In the first place, this is technologically complicated, and secondly it is not free from disadvantages, in that the thicknesses of the plastics layers cannot be directly controlled. More particularly, there are no means of adjustment for the individual thermoplasticised stream or streams which are to be laid one on another.This adjustment is important when plastics ribbons are to be made with individual layers of a readily adjustable thickness which moreover remains constant, within minor tolerances, over the entire breadth of the plastics ribbon.
The object of the invention is to provide equipment for continuous extrusion of laiminated plastics ribbon with which there is no need for a wide-slit ribbon running parallel to the composing channel and feeding the reforming unit, and with which the individual layer thicknesses are adjustable. The term adjustment covers control in respect of both thickness and the correction of thickness errors.
According to the present invention, the composing channel has a substantially rectangular cross-section with corner fillets, and is connected at one end to a coaxially mounted feed channel from a first plastics worm extruder and at the other end to the reforming unit, at least one entry channel connected to another plastics worm extruder and at the other end to the reforming unit, at least one entry channel connected to another plastics worm extruder is disposed downstream of the feed channel and extends over one side of the rectangular composing channel cross-section into which it opens, and a control pin is disposed rotatably in a cylinderical hole opening into the path of the entry channel so that the control pin projects into the entry channel, and the control pin has a variable profile round its periphery so that the entry channel section can be adjusted.The entry channel preferably extends over the breadth of one long side of the composing channel crosssection. To enable the equipment to be adaptable for a variety of plastics materials, it is preferred to provide a plurality of control pins to fit the cylindrical hole interchangeablyFa-nd having different profiles round their peripheries for effecting the entry channel section adjustments.
The accrucing advantages are to be seen first in that by adjusting the control pin in the equipment of the invention one can vary the thickness of the plastics layer laid over the primary plastics stream fed into the composing channel. A further achievement is that the different layers in the finished plastics ribbon can be given the same thickness throughout, for example by setting the control pin to increase or reduce the thicknesses at the edges compared with the middle regions. A special advantage of the preferred feature is the ease with which the control pins can be interchanged so as to adapt the equipment of the invention for the widest variety of extrusion requirements. The features specified can be provided in any number, one beyond another and at different parts of the composing channel.
An embodiment of the invention will now be described, by way of example only, with reference to the accompanying diagrammatic drawings, in which: Figure 1 is a side elevation of equipment in accordance with the invention, parts of the collecting block being sectioned axially; Figure 2 is a part-sectional elevation taken from the line A-A of Figure 1; and Figure 3 is an end elevation and four different side elevations of a control pin from the equipment of Figures 1 and 2.
The equipment shown in the Figures is intended for continuous extrusion of laminated plastics ribbon with the aid of at least two plastics worm extruders (not shown). The equipment has a collecting block 1, a reforming unit 2 downstream of the collecting block 1, and a wide-slit nozzle 3 through which the laminated plastics ribbon emerges. The collecting block 1 has a composing channel 4 to which the plastics worm extruders are connected. The composing channel 4 is connected through the reforming unit 2 to the wide-slit nozzle 3.
It will be seen from Figures 1 and 2 that the composing channel 4 has a substantially rectangular cross-section with corner fillets 5 and that this composing channel 4 is connected at one end to a coaxially mounted feed channel 6 from the first plastics worm extruder and at the other end to the reforming unit 2. Downstream of the feed channel 6, and in fact in the embodiment shown, at the junction between the feed channel 6 and the composing channel 4, there are disposed two entry channels 7 connected to two other plastics worm extruders (not shown) by channels 8.
These entry channels 7 extend over one long side 15 each of the rectangular composing channel cross-section and open into it. A control pin 10 is disposed rotatably in a cylindrical hole 9 opening into the path of each entry channel 7 and the control pin projects into the adjacent entry channel 7 to a different extent depending on its setting, or lies clear of the channel, because its periphery is variably profiled to adjust the section (B) of the entry channel 7. This feature is clarified by Figure 3, which shows different profiles 11, 12, 13 and 14. It is self evident that as the equipment is provided with a plurality of control pins 10, which can be interchanged and which have different profiles round their peripheries, it is capable of adaptation to different operating conditions.

Claims (1)

1. Equipment for continuous extrusion of laminated plastics ribbon with the aid of at least two plastics worm extruders, a collecting block, a reforming unit and a wideslit nozzle through which the laminated plastics ribbon emerges, the collecting block having a composing channel to which the plastics worm extruders are connected and which is connected through the reforming unit to the wide slit nozzle, the composing channel having a substantially rectangular crosssection with corner fillets and being connected at one end to a coaxially mounted feed channel from a first plastics worm extruder and atthe other end to the reforming unit, at least one entry channel connected to another plastics worm extruder being disposed downstream of the feed channel and extending over one side of the rectangular composing channel cross-section into which it opens, and a control pin being disposed rotatably in a cylindrical hole opening into the path of the entry channel so that the control pin projects into the entry channel, the control pin having a variable profile round its periphery so that the entry channel section can be adjusted.
2. Equipment as in Claim 1, wherein the entry channel extends over the breadth of one long side of the composing channel crosssection.
3. Equipment as in either of Claims 1 and 2, wherein a plurality of control pins is provided to fit the cylindrical hole interchangeably and having different profiles round their peripheries for effecting the entry channel section adjustments.
4. Equipment for continuous extrusion of laminated plastics ribbon and substantially as hereinbefore described with reference to the accompanying drawings.
CLAIMS Amendments to the claims have been filed, and have the following effect: Claims 1 and 3 above have been deleted or textually amended.
New or textually amended claims have been filed as follows:Claims 4 above have been renumbered as 3 and their appendancies corrected.
1. Equipment for continuous extrusion of laminated plastics ribbon with the aid of at least two plastics worm extruders, a collecting block, a reforming unit and a wide-slit nozzle through which the laminated plastics ribbon emerges, the collecting block having a composing channel to which the plastics worm extruders are connected and which is connected through the reforming unit td tne wide slit nozzle, the composing channel being connected at one end to a coaxially mounted feed channel from a first plastics worm extruder and at the other end to the reforming unit, at least one entry channel connected to another plastics worm extruder being disposed downstream of the feed channel and extending over one side of the rectangular composing channel cross-section into which it opens, a cylindrical hole opening into the path of the entry channel, and a plurality of interchangeable control pins each adapted to fit in the hole so that the control pin projects into the entry channel, the control pins having different variable profiles round their peripheries and each control pin being rotatable in the hole to bring any one of its profiles into the entry channel so that the entry channel section can be adjusted.
GB08502063A 1984-02-15 1985-01-28 Apparatus for regulating the flow of a plastics layer in laminated plastics ribbon extrusion Expired GB2154932B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
DE19843405256 DE3405256A1 (en) 1984-02-15 1984-02-15 DEVICE FOR CONTINUOUSLY EXTRUDING A MULTI-LAYER PLASTIC RAIL

Publications (3)

Publication Number Publication Date
GB8502063D0 GB8502063D0 (en) 1985-02-27
GB2154932A true GB2154932A (en) 1985-09-18
GB2154932B GB2154932B (en) 1987-04-15

Family

ID=6227695

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08502063A Expired GB2154932B (en) 1984-02-15 1985-01-28 Apparatus for regulating the flow of a plastics layer in laminated plastics ribbon extrusion

Country Status (5)

Country Link
JP (1) JPS60192613A (en)
DE (1) DE3405256A1 (en)
FR (1) FR2559419B1 (en)
GB (1) GB2154932B (en)
IT (1) IT1208500B (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5087488A (en) * 1989-10-19 1992-02-11 Aeroquip Corporation Method and apparatus for forming a plastic article with an overlay of varying thickness having a shaded color appearance
US5234330A (en) * 1991-06-14 1993-08-10 Eastman Kodak Company Dies

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2593111B1 (en) * 1986-01-17 1988-07-22 Ono THERMOPLASTIC MATERIAL DISTRIBUTION DEVICE FOR THE EXTRUSION OF MULTILAYERED SHEETS.
US4784815A (en) * 1987-06-05 1988-11-15 P.C.E. Corp. Edge-laminating apparatus and process
US4789513A (en) * 1987-06-05 1988-12-06 P.C.E. Corp. Coextrusion apparatus and process

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1188264A (en) * 1968-04-19 1970-04-15 Monsanto Chemicals Process for the Extrusion of Resins
GB1370355A (en) * 1970-09-09 1974-10-16 Leesona Corp Plastic materials
GB1455506A (en) * 1973-03-09 1976-11-10 Berstorff Gmbh Masch Hermann Elongate slit extrusion nozzle with flow adjustment means
GB2089719A (en) * 1980-12-19 1982-06-30 Lavorazione Mat Plast Adaptor for extruding a plurality of streams of synthetic thermoplastic foam simultaneously from a single extruder
GB2097710A (en) * 1981-05-01 1982-11-10 Silvatrim Ass Padded molding strip
GB2139553A (en) * 1983-04-15 1984-11-14 Cosden Technology Valve plate and feedblock design for co-extrusion apparatus and co-extrusion process using same

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR999947A (en) * 1946-02-06 1952-02-06 Comp Generale Electricite Device applicable to extrusion machines for the production of strips
USRE26237E (en) * 1959-03-12 1967-07-18 Manufacture of spectacle frames
DE1226778B (en) * 1961-11-10 1966-10-13 Metzeler Ag Extrusion head for the production of strangfoermigen bodies made of rubber or the like
FR2087706A5 (en) * 1970-05-28 1971-12-31 Samafor Extrusion die for laminate prodn - with at least two slots of variable section
US3860372A (en) * 1971-02-26 1975-01-14 Dow Chemical Co Adjustable feedblock for encapsulated multilayer extrusion
US3759653A (en) * 1971-06-30 1973-09-18 Standard Oil Co Extrusion die with arched choke bar
JPS5634653B2 (en) * 1971-09-27 1981-08-12
JPS54124067A (en) * 1978-03-20 1979-09-26 Mitsubishi Heavy Ind Ltd Extrusion die
US4283168A (en) * 1979-09-13 1981-08-11 Westvaco Corporation Thermoplastic film extrusion apparatus
US4413973A (en) * 1981-06-24 1983-11-08 Automation International Corp. Extrusion die
US4411614A (en) * 1982-02-18 1983-10-25 E. I. Du Pont De Nemours & Co. Removable contoured insert for an extrusion die

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1188264A (en) * 1968-04-19 1970-04-15 Monsanto Chemicals Process for the Extrusion of Resins
GB1370355A (en) * 1970-09-09 1974-10-16 Leesona Corp Plastic materials
GB1455506A (en) * 1973-03-09 1976-11-10 Berstorff Gmbh Masch Hermann Elongate slit extrusion nozzle with flow adjustment means
GB2089719A (en) * 1980-12-19 1982-06-30 Lavorazione Mat Plast Adaptor for extruding a plurality of streams of synthetic thermoplastic foam simultaneously from a single extruder
GB2097710A (en) * 1981-05-01 1982-11-10 Silvatrim Ass Padded molding strip
GB2139553A (en) * 1983-04-15 1984-11-14 Cosden Technology Valve plate and feedblock design for co-extrusion apparatus and co-extrusion process using same

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5087488A (en) * 1989-10-19 1992-02-11 Aeroquip Corporation Method and apparatus for forming a plastic article with an overlay of varying thickness having a shaded color appearance
US5234330A (en) * 1991-06-14 1993-08-10 Eastman Kodak Company Dies

Also Published As

Publication number Publication date
DE3405256A1 (en) 1985-08-22
GB8502063D0 (en) 1985-02-27
FR2559419A1 (en) 1985-08-16
IT8519446A0 (en) 1985-02-08
FR2559419B1 (en) 1988-11-10
IT1208500B (en) 1989-07-10
JPS60192613A (en) 1985-10-01
JPH0249898B2 (en) 1990-10-31
GB2154932B (en) 1987-04-15
DE3405256C2 (en) 1987-07-09

Similar Documents

Publication Publication Date Title
US4695236A (en) Apparatus for continuous extrusion of a multilayer synthetic resin web
US5223276A (en) Multilayer coextrusion apparatus
US4562023A (en) Process and apparatus for producing a synthetic resin sheet having a colored band of varying color intensity
CA1159619A (en) Coextrusion device
US4128386A (en) Apparatus for the extrusion of patterned sheets or panels of thermoplastic synthetic resin compositions
US4526528A (en) Apparatus for forming a co-extrusion from extruded strips
US6495081B2 (en) Method for manufacturing tread bands for vehicle tires
US3557268A (en) Extrusion of plastic netting
US6695606B1 (en) Extrudate shrinkage control and reduction
US4081231A (en) Flow distribution valve for dual thermoplastic tube extrusion
EP0353064B1 (en) Method and apparatus for feeding a plurality of molten resin jet streams into T die
GB2154932A (en) Apparatus for regulating the flow of a plastics layer in laminated plastics ribbon extrusion
US5219588A (en) Die assembly control
US4690628A (en) Adjustable feed block for coextrusion die
US3475787A (en) Extruder
CA1219108A (en) Process and apparatus for the production of a plastics foil possessing a colour strip with differential colour intensity
US3684422A (en) Fishtail die for producing thermoplastic films and sheets
US3504402A (en) Extrusion adaptor
US3764245A (en) Apparatus for producing light structural board of thermoplastic resin
DE2940356C2 (en)
US5332314A (en) Extrusion apparatus with a backfeed extruder for mixing and extruding of thermo-plastic and thermo-setting materials
SE420692B (en) Device for coextrusion of thermoplastic laminate
DE19802646C1 (en) Multilayer plastic strip manufacture with low thickness variation across width by combining streams for outer layers before they are widened for combining with central layer
WO1999038664A1 (en) Extrudate shrinkage control and reduction
JP3132856B2 (en) Thermoplastic resin sheet manufacturing equipment

Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee