GB969689A - Extrusion process and apparatus therefor - Google Patents

Extrusion process and apparatus therefor

Info

Publication number
GB969689A
GB969689A GB23745/62A GB2374562A GB969689A GB 969689 A GB969689 A GB 969689A GB 23745/62 A GB23745/62 A GB 23745/62A GB 2374562 A GB2374562 A GB 2374562A GB 969689 A GB969689 A GB 969689A
Authority
GB
United Kingdom
Prior art keywords
fragments
collar
die face
profile
june
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
GB23745/62A
Inventor
Frederick Bild
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 GB23745/62A priority Critical patent/GB969689A/en
Priority to FR938808A priority patent/FR1365597A/en
Priority to CH773563A priority patent/CH413350A/en
Priority to NL294300D priority patent/NL294300A/xx
Publication of GB969689A publication Critical patent/GB969689A/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
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/919—Thermal treatment of the stream of extruded material, e.g. cooling using a bath, e.g. extruding into an open bath to coagulate or cool the material
    • 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
    • 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
    • B29C48/25—Component parts, details or accessories; Auxiliary operations
    • B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
    • B29C48/911—Cooling
    • 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

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)

Abstract

969,689. Preventing contamination of extrudates. IMPERIAL CHEMICAL INDUSTRIES Ltd. June 7, 1963 [June 20, 1962], No. 23745/62. Heading B5A. A process for preventing contamination of an extruded profile of thermoplastic polymeric material by a discoloured collar or fragments thereof, temporarily adherent to the die face surrounding the extrusion orifice comprises cooling the orifice and/or its adherent material, by a directed blast of cooling gas supplied at such a rate as to maintain the adhering material at a temperature below that of substantial thermal degradation or at which thermally induced reaction with the gas can occur. The collar or fragments thereof, once detached, may travel with the profile, which is cooled until at least its surface has solidified, until shear, compression or impact forces are applied to separate the collar or fragments from the profile and so prevent or reduce irregularities in the latter. The gas used may be air, carbon dioxide or nitrogen. The apparatus used comprises nozzles 2 discharging flat jets towards the collars 3 and the die face 1 which is tapered to approach the extrudate tangentially. Alternatively the die face may be flat, whilst other forms of nozzles, including an annular nozzle, may be used. The process may be used for moulding pellets of polyhexamethylene adipamide/glass fibre. Specification 950,656 is referred to.
GB23745/62A 1962-06-20 1962-06-20 Extrusion process and apparatus therefor Expired GB969689A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB23745/62A GB969689A (en) 1962-06-20 1962-06-20 Extrusion process and apparatus therefor
FR938808A FR1365597A (en) 1962-06-20 1963-06-20 Extrusion method and apparatus
CH773563A CH413350A (en) 1962-06-20 1963-06-20 Method and apparatus for extrusion of a mixture of thermoplastic polymer and inert filler material
NL294300D NL294300A (en) 1962-06-20 1963-06-20

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB23745/62A GB969689A (en) 1962-06-20 1962-06-20 Extrusion process and apparatus therefor

Publications (1)

Publication Number Publication Date
GB969689A true GB969689A (en) 1964-09-16

Family

ID=10200620

Family Applications (1)

Application Number Title Priority Date Filing Date
GB23745/62A Expired GB969689A (en) 1962-06-20 1962-06-20 Extrusion process and apparatus therefor

Country Status (4)

Country Link
CH (1) CH413350A (en)
FR (1) FR1365597A (en)
GB (1) GB969689A (en)
NL (1) NL294300A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4932971A (en) * 1972-07-26 1974-03-26

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS4932971A (en) * 1972-07-26 1974-03-26
JPS5331908B2 (en) * 1972-07-26 1978-09-05

Also Published As

Publication number Publication date
NL294300A (en) 1965-04-12
CH413350A (en) 1966-05-15
FR1365597A (en) 1964-07-03

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