GB886313A - A method of and apparatus for producing hollow threads, bands, tubes and the like from synthetic thermoplastic materials - Google Patents

A method of and apparatus for producing hollow threads, bands, tubes and the like from synthetic thermoplastic materials

Info

Publication number
GB886313A
GB886313A GB6421/58A GB642158A GB886313A GB 886313 A GB886313 A GB 886313A GB 6421/58 A GB6421/58 A GB 6421/58A GB 642158 A GB642158 A GB 642158A GB 886313 A GB886313 A GB 886313A
Authority
GB
United Kingdom
Prior art keywords
mandrel
cavity
forming medium
interior
communication
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
GB6421/58A
Inventor
Willy Behm
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.)
ITCF Institut fur Textilchemie und Chemiefasern
Original Assignee
ITCF Institut fur Textilchemie und Chemiefasern
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 ITCF Institut fur Textilchemie und Chemiefasern filed Critical ITCF Institut fur Textilchemie und Chemiefasern
Priority to GB6421/58A priority Critical patent/GB886313A/en
Publication of GB886313A publication Critical patent/GB886313A/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
    • 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
    • B29C48/03—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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/10—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels flexible, e.g. blown foils
    • 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
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • B29C48/11—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels comprising two or more partially or fully enclosed cavities, e.g. honeycomb-shaped
    • 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
    • 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
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/24—Formation of filaments, threads, or the like with a hollow structure; Spinnerette packs therefor
    • 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
    • D01D5/00—Formation of filaments, threads, or the like
    • D01D5/253—Formation of filaments, threads, or the like with a non-circular cross section; Spinnerette packs therefor

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Textile Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Spinning Methods And Devices For Manufacturing Artificial Fibers (AREA)

Abstract

Hollow artificial filaments, tubular films and tubes are produced by melt-extruding a synthetic thermoplastic resin through extrusion nozzles, each nozzle being provided with a core in the form of a hollow mandrel, the interior of which communicates with the atmosphere or with a source of a cavity-forming medium at slightly super-atmospheric pressure, the interior of the mandrel being provided with a coaxial tube, the outside diameter of which is less than the inside diameter of the mandrel and the end of which remote from the extrusion orifice is in communication with a duct which, in turn, is in communication with a source of supply of a cavity-forming medium at slightly superatmospheric pressure when the interior of the mandrel is in communication with the atmosphere, and vice versa. The space between the extrusion orifice and the hollow mandrel may be provided with one or more cross pieces. Both the interior of the hollow mandrel and the coaxial tube within it may be in communication with the same source of supply of cavity-forming medium so that the latter may be recycled. Either the hollow mandrel or the coaxial tube may project beyond the inlet surface of the spinneret plate in the form of a chimney in order to facilitate the discharge of the cavity-forming medium into the atmosphere. The cavity-forming medium may be a gas, a liquid or a freely-flowing particulate solid. Specification 859,325 and Swiss Specification 222,772 are referred to.ALSO:Hollow artificial filaments, tubular films and tubes are produced by melt-extruding a synthetic thermoplastic resin through extrusion nozzles, each nozzle being provided with a core in the form of a hollow mandrel, the interior of which communicates with the atmosphere or with a source of a cavity-forming medium at slightly super-atmospheric pressure, the interior of the mandrel being provided with a coaxial tube the outside diameter of which is less than the inside diameter of the mandrel and the end of which remote from the extrusion orifice is in communication with a duct which, in turn, is in communication with a source of supply of a cavity-forming medium at slightly superatmospheric pressure when the interior of the mandrel is in communication with the atmosphere, and vice versa. The space between the extrusion orifice and the hollow mandrel may be provided with one or more cross pieces. Both the interior of the hollow mandrel and the coaxial tube within it may be in communication with the same source of supply of cavity-forming medium so that the latter may be recycled. Either the hollow mandrel or the coaxial tube may project beyond the inlet surface of ths spinneret plate in the form of a chimney in order to facilitate the discharge of the cavity-forming medium into the atmosphere. The cavity-forming medium may be a gas, a liquid or a freely-flowing particulate solid. Specification 859,325 and Swiss Specification 222,772 is referred to.
GB6421/58A 1958-02-27 1958-02-27 A method of and apparatus for producing hollow threads, bands, tubes and the like from synthetic thermoplastic materials Expired GB886313A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB6421/58A GB886313A (en) 1958-02-27 1958-02-27 A method of and apparatus for producing hollow threads, bands, tubes and the like from synthetic thermoplastic materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB6421/58A GB886313A (en) 1958-02-27 1958-02-27 A method of and apparatus for producing hollow threads, bands, tubes and the like from synthetic thermoplastic materials

Publications (1)

Publication Number Publication Date
GB886313A true GB886313A (en) 1962-01-03

Family

ID=9814197

Family Applications (1)

Application Number Title Priority Date Filing Date
GB6421/58A Expired GB886313A (en) 1958-02-27 1958-02-27 A method of and apparatus for producing hollow threads, bands, tubes and the like from synthetic thermoplastic materials

Country Status (1)

Country Link
GB (1) GB886313A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2437858A1 (en) * 1978-10-02 1980-04-30 Akzo Nv HOLLOW FIBER MEMBRANE FOR DIALYSIS COMPRISING LONGITUDINAL Ripples

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2437858A1 (en) * 1978-10-02 1980-04-30 Akzo Nv HOLLOW FIBER MEMBRANE FOR DIALYSIS COMPRISING LONGITUDINAL Ripples

Similar Documents

Publication Publication Date Title
ES336426A1 (en) Method for the manufacture of tubes of plastics material
GB592705A (en) Method of and apparatus for manufacturing hollow articles, such as collapsible tubes, from plastic materials
GB1049105A (en) Apparatus for the continuous production of hollow bodies
DE68910624D1 (en) Device for the production of tubes with annular fins.
US3533884A (en) Fiber reinforced thermoplastic film and method of manufacture therefor
GB886313A (en) A method of and apparatus for producing hollow threads, bands, tubes and the like from synthetic thermoplastic materials
GB1152306A (en) Process and apparatus for Manufacturing Foamed Articles of Thermoplastic Materials
US2935764A (en) Method for blowing plastic bottles
US2616128A (en) Method and apparatus for extruding tubes from thermoplastic compositions
AT305614B (en) Extrusion press for the production of a tubular preform made of thermoplastic material for blow molding
GB1023639A (en) Method of and apparatus for producing coated thermoplastic tubes and containers
GB929200A (en) Improvements in or relating to extrusion dies for the production of tubular films
GB969453A (en) Manufacture of squeeze tube containers
GB1167844A (en) Process and Apparatus for the Manufacture of Bodies of Cellular Plastics Material for Buffers, in particular for Cranes and Railway Wagons.
GB629207A (en) Improvements in coaxial cable and method of making same
GB343434A (en) Improvements in and relating to the manufacture of continuous lengths of plastic materials
GB740742A (en) Apparatus for manufacturing artificial skin structures, such as sausage casings, from animal skin material
GB904865A (en) A new or improved method of producing thin-walled tubes and tubular fibres of large diameter from synthetic plastic materials, and apparatus for performing the method
ES308581A1 (en) Method for making plastic articles
GB1075496A (en) A method of manufacturing articles and structures to be used in building
GB1486016A (en) Method of and apparatus for treating the outer surface and inner surface of a pipe of a thermoplastic resinous material produced by extrusion
CH475082A (en) Die head for the production of cross-shrinkable tubular films
JPS5455066A (en) Head for blow molding
GB823066A (en) Extrusion apparatus and process
JPS57131527A (en) Manufacturing device of fiber-reinforced pressure hose