EP0547700A1 - Distributor disc for molten thermoplastic material, for a spinning head - Google Patents
Distributor disc for molten thermoplastic material, for a spinning head Download PDFInfo
- Publication number
- EP0547700A1 EP0547700A1 EP92203901A EP92203901A EP0547700A1 EP 0547700 A1 EP0547700 A1 EP 0547700A1 EP 92203901 A EP92203901 A EP 92203901A EP 92203901 A EP92203901 A EP 92203901A EP 0547700 A1 EP0547700 A1 EP 0547700A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- disc
- spinning
- thermoplastic material
- distributor disc
- molten thermoplastic
- 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.)
- Ceased
Links
Images
Classifications
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D4/00—Spinnerette packs; Cleaning thereof
- D01D4/06—Distributing spinning solution or melt to spinning nozzles
-
- D—TEXTILES; PAPER
- D01—NATURAL OR MAN-MADE THREADS OR FIBRES; SPINNING
- D01D—MECHANICAL METHODS OR APPARATUS IN THE MANUFACTURE OF ARTIFICIAL FILAMENTS, THREADS, FIBRES, BRISTLES OR RIBBONS
- D01D1/00—Treatment of filament-forming or like material
- D01D1/06—Feeding liquid to the spinning head
Definitions
- This invention relates to a distributor disc for molten thermoplastic material fed to a spinning head for spinning plastic masses, to obtain synthetic yarn.
- the mass to be spun is fed onto said distributor disc, so that in flowing over its conical crown-like surface it is distributed uniformly by a plurality of concave radial grooves in spoke arrangement, which converge with, and expel the molten thermoplastic material into, grooves in the outer circumferential edge of the disc.
- thermoplastic masses such as polyesters, polyamides etc.
- the mass of thermoplastic synthetic material to form the yarn is preferably fed by an extrusion press along a central channel to the inlet of a spinning head, from which the yarn emerges through sized nozzles to be collected on winding devices.
- the starting polymer in the solid state passes initially through a heating process in which it is melted to the liquid state, after which it is fed by an extrusion press or any other suitable member to the actual spinning block.
- This spinning block comprises in practice a disc for distributing the molten polymer entering the underlying filter block.
- this molten polymer distributor disc has substantial drawbacks, related to the formation of static molten masses, ie residual material which solidifies in the corners between the wall of the spinning block and the surface of the distributor disc.
- the residual material which solidifies during spinning on the one hand contributes hydrodynamic resistance to the flow of the molten polymer, and on the other hand after a more or less lengthy period of operation reduces the passage cross-section, to finally block the spinning process.
- Said distributor disc for thermoplastic material comprises a conical crown-like surface in which there are provided a plurality of concave radial grooves with their cross-section gradually increasing from the centre to the periphery at the grooved outer circumferential edge.
- Said concave radial grooves are arranged as spokes uniformly distributed over the conical crown-like surface of the disc, each concave radial groove converging with and opening into a respective groove in the grooved outer circumferential edge.
- Said grooves in the outer circumferential edge are of substantially rectangular shape with sufficiently rounded corners.
- FIG. 1 The figure of the single accompanying drawing shows a schematic section on a vertical axis though a spinning block comprising the distributor disc for molten thermoplastic material of the present invention.
- the polymer in the molten liquid state is fed under pressure in the direction 9 into the central entry duct 3 of the spinning block 1. All this is well known to the expert of the art. As is also known, the path for the molten polymer entering the spinning block 1 must be made fluid-tight by gaskets 11 of suitable material.
- the molten polymer flows under pressure through the central duct 3 in the block 7 and onto the conical crown-like surface 6 of the distributor disc 8. Said molten polymer is distributed circumferentially and flows uniformly along the direction 2 within the circumferential space between the surfaces 6 and 4.
- the molten polymer is obliged to enter concave radial grooves 5 in spoke arrangement, said radial grooves 5 being concave and with their cross-section gradually increasing in size from the centre of the conical surface 6 to the periphery at the grooved outer circumferential edge of the distributor disc 8.
- the cross-section gradually increases in size in order to maintain the circumferential passage section for the molten polymer substantially constant.
- This latter flows uniformly into the discoidal space 14, to pass through the filter block 10 and then into the underlying discoidal space 14, from which it leaves to pass through the plate 15 via the sized passage holes 18, from which it emerges to flow firstly into the discoidal space 20 and then through the sized nozzles 16 in the plate 19.
- the plate 19 which represents the actual spinning element, the molten polymer leaves in the direction 12 in its final spun yarn form to be collected on an underlying winding unit (not shown).
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Textile Engineering (AREA)
- Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)
Abstract
The invention provides a distributor disc (8) for molten thermoplastic material feeding a spinning head for spinning synthetic yarn, said distributor disc (8) having an upper conical crown-like surface (6) provided with a plurality of concave radial grooves (5) shaped with their cross-section substantially in the form of a circular arc which gradually increases in size from the centre to the periphery at the grooved outer circumferential edge.
Description
- This invention relates to a distributor disc for molten thermoplastic material fed to a spinning head for spinning plastic masses, to obtain synthetic yarn. The mass to be spun is fed onto said distributor disc, so that in flowing over its conical crown-like surface it is distributed uniformly by a plurality of concave radial grooves in spoke arrangement, which converge with, and expel the molten thermoplastic material into, grooves in the outer circumferential edge of the disc.
- It is known to produce yarn from thermoplastic masses, such as polyesters, polyamides etc., by the extrusion spinning method. In this respect, the mass of thermoplastic synthetic material to form the yarn is preferably fed by an extrusion press along a central channel to the inlet of a spinning head, from which the yarn emerges through sized nozzles to be collected on winding devices.
- The starting polymer in the solid state passes initially through a heating process in which it is melted to the liquid state, after which it is fed by an extrusion press or any other suitable member to the actual spinning block.
- This spinning block comprises in practice a disc for distributing the molten polymer entering the underlying filter block. In known constructions, this molten polymer distributor disc has substantial drawbacks, related to the formation of static molten masses, ie residual material which solidifies in the corners between the wall of the spinning block and the surface of the distributor disc. The residual material which solidifies during spinning on the one hand contributes hydrodynamic resistance to the flow of the molten polymer, and on the other hand after a more or less lengthy period of operation reduces the passage cross-section, to finally block the spinning process.
- Again, any residues which disintegrate and reach the seats of the underlying spinning nozzles can negatively influence the spinning process underway. The applicant, after careful research, has conceived a distributor disc for molten thermoplastic material, the subject of the present invention, which obviates the aforesaid drawbacks by an original solution which makes it impossible for any residual molten material to solidify by stagnancy. Said distributor disc for thermoplastic material comprises a conical crown-like surface in which there are provided a plurality of concave radial grooves with their cross-section gradually increasing from the centre to the periphery at the grooved outer circumferential edge. Said concave radial grooves are arranged as spokes uniformly distributed over the conical crown-like surface of the disc, each concave radial groove converging with and opening into a respective groove in the grooved outer circumferential edge. Said grooves in the outer circumferential edge are of substantially rectangular shape with sufficiently rounded corners.
- The present invention will be more apparent with reference to the accompanying drawing, which shows one embodiment of the claimed distributor disc.
- The figure of the single accompanying drawing shows a schematic section on a vertical axis though a spinning block comprising the distributor disc for molten thermoplastic material of the present invention.
- The polymer in the molten liquid state is fed under pressure in the
direction 9 into thecentral entry duct 3 of the spinning block 1. All this is well known to the expert of the art. As is also known, the path for the molten polymer entering the spinning block 1 must be made fluid-tight bygaskets 11 of suitable material. The molten polymer flows under pressure through thecentral duct 3 in the block 7 and onto the conical crown-like surface 6 of thedistributor disc 8. Said molten polymer is distributed circumferentially and flows uniformly along thedirection 2 within the circumferential space between the surfaces 6 and 4. On said surface 6 the molten polymer is obliged to enter concaveradial grooves 5 in spoke arrangement, saidradial grooves 5 being concave and with their cross-section gradually increasing in size from the centre of the conical surface 6 to the periphery at the grooved outer circumferential edge of thedistributor disc 8. - The cross-section gradually increases in size in order to maintain the circumferential passage section for the molten polymer substantially constant. This latter flows uniformly into the
discoidal space 14, to pass through thefilter block 10 and then into the underlyingdiscoidal space 14, from which it leaves to pass through theplate 15 via the sizedpassage holes 18, from which it emerges to flow firstly into thediscoidal space 20 and then through thesized nozzles 16 in theplate 19. From theplate 19, which represents the actual spinning element, the molten polymer leaves in thedirection 12 in its final spun yarn form to be collected on an underlying winding unit (not shown). - The description is given by way of example only, it being apparent that modifications in terms of detail can be made to the distributor disc according to the present invention, but without leaving the scope of the inventive idea as claimed hereinafter.
Claims (3)
- A distributor disc for molten thermoplastic material feeding a spinning head for spinning plastic masses, to obtain yarn or similar filiform elements, the molten mass being fed to said disc by a screw press or pump via a duct delivering to the centre of said disc a metered quantity of spinning mass, which flows over the curved conical crown-like surface of the disc and into the underlying filter block, to pass under pressure to a plate carrying a series of nozzles as the actual spinning implement, said distributor disc being characterised by comprising in its conical crown-like surface a plurality of concave radial grooves with their cross-section substantially in the form of a circular arc which gradually increases in size from the centre to the periphery at the grooved outer circumferential edge.
- A distributor disc for molten thermoplastic material feeding a spinning head as claimed in claim 1, characterised in that the concave radial grooves are arranged as spokes uniformly distributed over the conical crown-like surface of the disc, each concave radial groove converging with and opening into a respective groove in the grooved outer circumferential edge.
- A distributor disc for molten thermoplastic material feeding a spinning head as claimed in claim 2, characterised in that the grooves in the outer circumferential edge are of substantially rectangular shape with sufficiently rounded corners.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
ITMI913420A IT1252556B (en) | 1991-12-19 | 1991-12-19 | DISTRIBUTOR DISC OF THERMOPLASTIC MATERIAL CAST FOR A SPINNING HEAD |
ITMI913420 | 1991-12-19 |
Publications (1)
Publication Number | Publication Date |
---|---|
EP0547700A1 true EP0547700A1 (en) | 1993-06-23 |
Family
ID=11361386
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP92203901A Ceased EP0547700A1 (en) | 1991-12-19 | 1992-12-12 | Distributor disc for molten thermoplastic material, for a spinning head |
Country Status (6)
Country | Link |
---|---|
EP (1) | EP0547700A1 (en) |
KR (1) | KR930013229A (en) |
CN (1) | CN1078002A (en) |
IT (1) | IT1252556B (en) |
MX (1) | MX9207432A (en) |
ZA (1) | ZA929782B (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4417815C1 (en) * | 1994-05-20 | 1995-10-12 | Inventa Ag | Filter for polymer melts or solns. |
DE19607103B4 (en) * | 1996-02-24 | 2006-01-26 | Zimmer Ag | Spinnpack with sand filter |
JP2011195989A (en) * | 2010-03-19 | 2011-10-06 | Toray Ind Inc | Spinning pack and method for producing filament yarn |
WO2023242680A1 (en) * | 2022-06-14 | 2023-12-21 | Aladdin Manufacturing Corporation | Flow modifying spin pack and methods for using the flow modifying spin pack |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2660369B1 (en) * | 2010-12-27 | 2016-05-18 | Toray Industries, Inc. | Composite spinneret and method of manufacturing composite fiber |
JP6793054B2 (en) * | 2017-02-10 | 2020-12-02 | 住友化学株式会社 | Method for manufacturing polymer filter and polymer film |
CN108893996B (en) * | 2018-06-15 | 2021-03-30 | 阿斯福特纺织(漳州)有限公司 | Balanced polyester fabric and forming process thereof |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3762850A (en) * | 1971-07-26 | 1973-10-02 | Akzona Inc | Spinning head |
-
1991
- 1991-12-19 IT ITMI913420A patent/IT1252556B/en active IP Right Grant
-
1992
- 1992-12-12 EP EP92203901A patent/EP0547700A1/en not_active Ceased
- 1992-12-16 KR KR1019920024408A patent/KR930013229A/en not_active Application Discontinuation
- 1992-12-17 ZA ZA929782A patent/ZA929782B/en unknown
- 1992-12-18 MX MX9207432A patent/MX9207432A/en unknown
- 1992-12-19 CN CN92115399A patent/CN1078002A/en active Pending
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3762850A (en) * | 1971-07-26 | 1973-10-02 | Akzona Inc | Spinning head |
Non-Patent Citations (1)
Title |
---|
SOVIET INVENTIONS ILLUSTRATED Section Ch, Week 8303, 2 March 1983 Derwent Publications Ltd., London, GB; Class A, AN 83-06904K & SU-A-912 781 (SYNTH FIBRES RES) 17 March 1982 * |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE4417815C1 (en) * | 1994-05-20 | 1995-10-12 | Inventa Ag | Filter for polymer melts or solns. |
DE19607103B4 (en) * | 1996-02-24 | 2006-01-26 | Zimmer Ag | Spinnpack with sand filter |
JP2011195989A (en) * | 2010-03-19 | 2011-10-06 | Toray Ind Inc | Spinning pack and method for producing filament yarn |
WO2023242680A1 (en) * | 2022-06-14 | 2023-12-21 | Aladdin Manufacturing Corporation | Flow modifying spin pack and methods for using the flow modifying spin pack |
Also Published As
Publication number | Publication date |
---|---|
CN1078002A (en) | 1993-11-03 |
KR930013229A (en) | 1993-07-21 |
ZA929782B (en) | 1993-06-23 |
IT1252556B (en) | 1995-06-19 |
MX9207432A (en) | 1993-07-01 |
ITMI913420A0 (en) | 1991-12-19 |
ITMI913420A1 (en) | 1993-06-19 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PUAI | Public reference made under article 153(3) epc to a published international application that has entered the european phase |
Free format text: ORIGINAL CODE: 0009012 |
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AK | Designated contracting states |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB GR IE LI LU MC NL PT SE |
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17P | Request for examination filed |
Effective date: 19931109 |
|
17Q | First examination report despatched |
Effective date: 19940926 |
|
STAA | Information on the status of an ep patent application or granted ep patent |
Free format text: STATUS: THE APPLICATION HAS BEEN REFUSED |
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18R | Application refused |
Effective date: 19950401 |