GB597006A - New and improved extrusion apparatus - Google Patents

New and improved extrusion apparatus

Info

Publication number
GB597006A
GB597006A GB2031545A GB2031545A GB597006A GB 597006 A GB597006 A GB 597006A GB 2031545 A GB2031545 A GB 2031545A GB 2031545 A GB2031545 A GB 2031545A GB 597006 A GB597006 A GB 597006A
Authority
GB
United Kingdom
Prior art keywords
die
extruded
polymer
spinning
tetrafluoroethylene
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.)
Expired
Application number
GB2031545A
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.)
EIDP Inc
Original Assignee
EI Du Pont de Nemours and Co
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 EI Du Pont de Nemours and Co filed Critical EI Du Pont de Nemours and Co
Publication of GB597006A publication Critical patent/GB597006A/en
Expired legal-status Critical Current

Links

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
    • D01D4/02—Spinnerettes
    • D01D4/022—Processes or materials for the preparation of spinnerettes
    • 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
    • B29C48/05—Filamentary, e.g. strands
    • 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
    • B29C48/32—Extrusion nozzles or dies with annular openings, e.g. for forming tubular articles
    • 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
    • B29C48/345—Extrusion nozzles comprising two or more adjacently arranged ports, for simultaneously extruding multiple strands, e.g. for pelletising
    • 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
    • B29C48/06—Rod-shaped
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S100/00—Presses
    • Y10S100/903—Pelleters
    • Y10S100/906—Reciprocating
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S128/00—Surgery
    • Y10S128/14—Polytetrafluoroethylene, i.e. PTFE
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S16/00—Miscellaneous hardware, e.g. bushing, carpet fastener, caster, door closer, panel hanger, attachable or adjunct handle, hinge, window sash balance
    • Y10S16/27—Bearings
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S425/00—Plastic article or earthenware shaping or treating: apparatus
    • Y10S425/055—Polytetrafluoroethylene, i.e. PTFE
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
    • Y10T428/00—Stock material or miscellaneous articles
    • Y10T428/31504—Composite [nonstructural laminate]
    • Y10T428/31678—Of metal
    • Y10T428/31692—Next to addition polymer from unsaturated monomers

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Textile Engineering (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

An extrusion die or spinneret is made entirely of, or has a surface consisting of, or a surface coated with, a tetrafluoroethylene polymer, the said surface being that contacted by the material to be extruded or spun, and the said <PICT:0597006/IV/1> <PICT:0597006/IV/2> surface being the external surface for delivering the extruded or spun material. Fig. 1 shows attached to a conventional extrusion apparatus 1 a die 4 in which certain surfaces are coated by the tetrafluoroethylene polymer 5. The chamber 6 can be used for a heating liquid, but can in fact be used for a cooling liquid, since the plastic 3 being extruded can be set and hardened without difficulty within the die. In a case such as is shown in this diagram, the die is most conveniently coated by being dipped in the molten tetrafluoroethylene polymer. Fig. 4 shows a spinneret 16 made entirely from a solid block of the polymer machined to fit the delivery end 10 of a conventional spinning apparatus. The spinneret alternatively may be made of metal with a coating on the delivery side: this coating will stop effectively the accumulation of extrusion plastic on the external surface and eliminate the frequent interruptions due to this cause encountered in melt-spinning. Alternatively, a thin film of polymerized tetrafluoroethylene can be given to the spinneret by rubbing it with a piece of the polymer. Copolymers, for example, those obtained by polymerizing tetrafluoroethylene with small amounts of other unsaturated compounds such as ethylene, may be used for the construction of the die. The material to be extruded may be polyethylene, nylon (melt-spinning) cellulose acetate (dry-spinning) or viscose (wet-spinning). The polymerized tetrafluoroethylene may be modified by addition of fillers such as carbon, silica, fluorspar, mica, fuller's earth, glass, asbestos, metal flakes, &c. Resistance heating wires may be embedded in it if required. It may be a comparatively low molecular weight, hard, waxy, high-melting material up to a high molecular weight film-forming polymer. In an example, polyethylene is extruded through a die lined with tetrafluroethylene polymer. No adhesion of the polyethylene to the die is noticed and the extruded material is characterised by an exceptionally smooth surface.
GB2031545A 1944-08-08 1945-08-08 New and improved extrusion apparatus Expired GB597006A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US54853644 US2403476A (en) 1944-08-08 1944-08-08 Extrusion apparatus

Publications (1)

Publication Number Publication Date
GB597006A true GB597006A (en) 1948-01-15

Family

ID=24189270

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2031545A Expired GB597006A (en) 1944-08-08 1945-08-08 New and improved extrusion apparatus

Country Status (2)

Country Link
US (1) US2403476A (en)
GB (1) GB597006A (en)

Families Citing this family (68)

* Cited by examiner, † Cited by third party
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US2514189A (en) * 1946-11-16 1950-07-04 Method and apparatus for making
US2699737A (en) * 1947-12-23 1955-01-18 Stickelber & Sons Inc Dough sheeting apparatus
US2552027A (en) * 1948-01-17 1951-05-08 American Cyanamid Co Casting gelatin tablets
US2586046A (en) * 1949-01-28 1952-02-19 William C Huebner Filament forming apparatus
US2783719A (en) * 1949-03-28 1957-03-05 Capitol Prod Corp Dough sheeting roll
US2604662A (en) * 1949-08-02 1952-07-29 Socony Vacuum Oil Co Inc Extrusion of inorganic oxide hydrogels
US2715879A (en) * 1950-05-23 1955-08-23 Wallace & Tiernan Inc Trifluorochloroethylene surfaced sheeting roller
US2655876A (en) * 1950-08-21 1953-10-20 Stickelber & Sons Inc Loaf molding machine
US2747222A (en) * 1951-06-11 1956-05-29 Polymer Corp Production of nylon rod
US2713698A (en) * 1951-06-28 1955-07-26 Du Pont Wet polymer extruder
US2729538A (en) * 1951-11-30 1956-01-03 Du Pont Prevention of nylon gel formation
US2719073A (en) * 1951-11-30 1955-09-27 Du Pont Melt spinning process
US2736057A (en) * 1952-05-19 1956-02-28 Equipment for making elongated shapes from polyamides
US2819209A (en) * 1952-11-15 1958-01-07 Pall Porous articles of fluoroethylene polymers and process of making the same
US2770836A (en) * 1953-06-10 1956-11-20 Monsanto Chemicals Pressure head for extruders
US2799045A (en) * 1954-05-12 1957-07-16 Continental Can Co Multiple tube extrusion machine for forming cork rods
US2794212A (en) * 1954-08-19 1957-06-04 Kon Kure Company Material treating system and apparatus
US2820252A (en) * 1954-10-18 1958-01-21 Polymer Corp Method of extrusion
US2939332A (en) * 1955-05-31 1960-06-07 Rca Corp Mechanical movement
US3015843A (en) * 1956-02-01 1962-01-09 Anchor Hocking Glass Corp Apparatus for making composite articles
US2905110A (en) * 1957-02-08 1959-09-22 Harry H Bundschuh Raised doughnut making machine
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US2994286A (en) * 1958-07-29 1961-08-01 Jr Joseph Mussari Adjustable patty mold
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US2937406A (en) * 1959-03-20 1960-05-24 Goodyear Tire & Rubber Fluid pressure core
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US3095607A (en) * 1962-07-10 1963-07-02 Du Pont Spinneret assembly
US3238865A (en) * 1963-09-19 1966-03-08 Aquila D Mast Apparatus for pelletizing particulate material
DE1244408B (en) * 1963-10-18 1967-07-13 Degussa Process for the preparation of polyoxymethylenes by continuously polymerizing trioxane in bulk
US3248758A (en) * 1964-05-15 1966-05-03 Gen Electric Mold for the manufacture of polyurethane foam articles
US3372218A (en) * 1964-09-30 1968-03-05 Du Pont Melt-spinning polyester filaments
US3424079A (en) * 1964-12-07 1969-01-28 Charles Francois Botha Pelleting machine
US3415206A (en) * 1965-03-31 1968-12-10 Reisman Howard Pretzel forming
NL99254C (en) * 1965-08-20
US3364524A (en) * 1965-08-25 1968-01-23 Continental Can Co Cooling plug for continuously extruded hot tubular plastic material
US3349432A (en) * 1965-09-03 1967-10-31 Rubbermaid Inc Continuous mixing machines
US3352229A (en) * 1965-09-07 1967-11-14 George W Morse Hay wafer and method and apparatus for manufacture
GB1169704A (en) * 1965-12-14 1969-11-05 Maurice Wooding Pellet Machine Die
US3446884A (en) * 1966-04-22 1969-05-27 Canadian Ind Extrusion process and apparatus for producing a thermoplastic pipe having a glossy surface
US3461500A (en) * 1967-03-02 1969-08-19 Fmc Corp Extrusion apparatus
US3942937A (en) * 1974-05-16 1976-03-09 General Electric Company Method of providing durable, slick sliding surfaces on extrusion forming apparatus, and the product thereof
DE2517402B1 (en) * 1975-04-19 1976-10-28 Werner & Pfleiderer PERFORATED PLATE FOR GRANULATING PLASTICS
JPS5418865A (en) * 1977-07-14 1979-02-13 Kobe Steel Ltd Extrusion molding of synthetic resin and die therefor
US4324748A (en) * 1978-07-28 1982-04-13 Japan Styrene Paper Corporation Process and apparatus for extruding plastic foams through a fluorocarbon lined die shaping means having extended wear characteristics
US4264294A (en) * 1979-01-08 1981-04-28 Ruiz Oscar F Profiling die
WO1981002996A1 (en) * 1980-04-23 1981-10-29 O Ruiz Profiling die
JPS5881147A (en) * 1981-10-29 1983-05-16 ユニオン・カ−バイド・コ−ポレ−シヨン Method of extruding linear polyolefin material
US4758398A (en) * 1986-10-07 1988-07-19 The Dexter Corporation Method of manufacture preforms
HUT48518A (en) * 1987-06-03 1989-06-28 Zoltan Balajthy Process for facilitating processing of thermoplastic polymers
US5008056A (en) * 1988-09-26 1991-04-16 Union Carbide Chemicals And Plastics Technology Corporation Reduction in die drool in filled resins and product improvement
US5281381A (en) * 1992-11-04 1994-01-25 Mobil Oil Corporation Method for extruding polyolefins containing vinylidene chloride polymers
US5507991A (en) * 1994-10-18 1996-04-16 Mudd; John R. Extrusion method for producing FD&C dyes
DE10308909A1 (en) * 2003-02-28 2004-09-09 Kulikov, Oleg L., Dr. Process and extrusion die for eliminating surface melt fractures in the extrusion of thermoplastic polymers
DE10355347A1 (en) * 2003-03-12 2004-09-23 Bühler AG Nozzle assembly forming strands of viscoelastic polymer or dough, has partitions with upstream cutting edge between each pair of nozzle channels
DE10320075A1 (en) * 2003-05-05 2004-12-02 Bühler AG Strand forming nozzle for viscoelastic materials (inlet widening)
DE10320073A1 (en) * 2003-05-05 2004-12-02 Bühler AG Strand forming nozzle for viscoelastic materials (outlet widening)
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DE102006041301A1 (en) * 2006-09-01 2008-03-06 Bühler AG Apparatus and method for extruding viscoelastic materials
DE102006049660B3 (en) * 2006-10-18 2008-02-14 Inoex Gmbh Assembly to extrude thermoplastic pipes has form chamber with adjustable radial inserts
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WO2024125894A1 (en) * 2022-12-12 2024-06-20 Sabic Global Technologies B.V. Die assembly for solid state extrusion of polyolefin materials

Also Published As

Publication number Publication date
US2403476A (en) 1946-07-09

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