GB823066A - Extrusion apparatus and process - Google Patents

Extrusion apparatus and process

Info

Publication number
GB823066A
GB823066A GB12674/56A GB1267456A GB823066A GB 823066 A GB823066 A GB 823066A GB 12674/56 A GB12674/56 A GB 12674/56A GB 1267456 A GB1267456 A GB 1267456A GB 823066 A GB823066 A GB 823066A
Authority
GB
United Kingdom
Prior art keywords
mandrel
barrel
inlet
channel
helical 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.)
Expired
Application number
GB12674/56A
Inventor
Kenneth George Gerber
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.)
Imperial Chemical Industries Ltd
Original Assignee
Imperial Chemical Industries Ltd
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 Imperial Chemical Industries Ltd filed Critical Imperial Chemical Industries Ltd
Priority to GB12674/56A priority Critical patent/GB823066A/en
Publication of GB823066A publication Critical patent/GB823066A/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
    • B29C48/25—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
    • B29C48/34—Cross-head annular extrusion nozzles, i.e. for simultaneously receiving moulding material and the preform to be coated
    • 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
    • B29C48/25—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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

A head for extruding tubes or tubular films comprises a mandrel 2 surrounded by a barrel 1 and forming therewith a channel for the extruded material, an inlet 7 to the channel, the mandrel 2 and barrel 1 closely fitting each other in the region of the inlet 7 and thereafter diverging from each other in the direction of extrusion to form an annular passage communicating with a die 6, and a helical channel 8 beginning at the inlet 7 and extruding into the annular passage. The helical channel may be in either or both the bore of the barrel or the inner surface of the mandrel. In operation molten material received <PICT:0823066/IV (a)/1> <PICT:0823066/IV (a)/2> from, e.g. a screw, enters the inlet 7, flows around the helical channel 8 until it reaches the diverging region of the mandrel 2 and barrel 1 where it gradually assumes an annular form and flows longitudinally through the die without exhibiting any "join lines" occasioned by the meeting of two or more longitudinally flowing streams of material. Air under pressure may be passed to the extruded tubing through the mandrel 2. Examples of thermoplastic material are polyesters, polythene, polyvinyl chloride and rubber hydrochloride.
GB12674/56A 1956-04-25 1956-04-25 Extrusion apparatus and process Expired GB823066A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB12674/56A GB823066A (en) 1956-04-25 1956-04-25 Extrusion apparatus and process

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB12674/56A GB823066A (en) 1956-04-25 1956-04-25 Extrusion apparatus and process

Publications (1)

Publication Number Publication Date
GB823066A true GB823066A (en) 1959-11-04

Family

ID=10009046

Family Applications (1)

Application Number Title Priority Date Filing Date
GB12674/56A Expired GB823066A (en) 1956-04-25 1956-04-25 Extrusion apparatus and process

Country Status (1)

Country Link
GB (1) GB823066A (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3355769A (en) * 1964-12-04 1967-12-05 Ball Brothers Res Corp Apparatus for forming hollow tubing
CN110181795A (en) * 2019-05-31 2019-08-30 江苏新成碳合新材料科技有限公司 A kind of polymer composite heat exchanger tube improves the preparation method of heating conduction
CN115157622A (en) * 2022-06-15 2022-10-11 华南理工大学 Multilayer melt spiral interweaving orientation co-extrusion blow molding die and method

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3355769A (en) * 1964-12-04 1967-12-05 Ball Brothers Res Corp Apparatus for forming hollow tubing
CN110181795A (en) * 2019-05-31 2019-08-30 江苏新成碳合新材料科技有限公司 A kind of polymer composite heat exchanger tube improves the preparation method of heating conduction
CN115157622A (en) * 2022-06-15 2022-10-11 华南理工大学 Multilayer melt spiral interweaving orientation co-extrusion blow molding die and method
CN115157622B (en) * 2022-06-15 2023-09-05 华南理工大学 Multilayer melt spiral interweaving orientation coextrusion blow molding die and method

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