GB822744A - Improvements relating to moulding polytetrafluorethylene - Google Patents

Improvements relating to moulding polytetrafluorethylene

Info

Publication number
GB822744A
GB822744A GB2865056A GB2865056A GB822744A GB 822744 A GB822744 A GB 822744A GB 2865056 A GB2865056 A GB 2865056A GB 2865056 A GB2865056 A GB 2865056A GB 822744 A GB822744 A GB 822744A
Authority
GB
United Kingdom
Prior art keywords
mould
heated
applied
pressure
moulding
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
GB2865056A
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.)
Montedison SpA
Montecatini Generale Per Lindustria Mineraria E Soc
Original Assignee
Montedison SpA
Montecatini Generale Per Lindustria Mineraria E Soc
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 Montedison SpA, Montecatini Generale Per Lindustria Mineraria E Soc filed Critical Montedison SpA
Priority to GB2865056A priority Critical patent/GB822744A/en
Publication of GB822744A publication Critical patent/GB822744A/en
Application status is Expired legal-status Critical

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C37/00Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0078Measures or configurations for obtaining anchoring effects in the contact areas between layers
    • B29C37/0082Mechanical anchoring
    • B29C37/0085Mechanical anchoring by means of openings in the layers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C43/00Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
    • B29C43/02Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
    • B29C43/18Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C70/00Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
    • B29C70/68Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
    • B29C70/74Moulding material on a relatively small portion of the preformed part, e.g. outsert moulding
    • B29C70/76Moulding on edges or extremities of the preformed part
    • B29C70/766Moulding on edges or extremities of the preformed part on the end part of a tubular article
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2027/00Use of polyvinylhalogenides or derivatives thereof as moulding material
    • B29K2027/12Use of polyvinylhalogenides or derivatives thereof as moulding material containing fluorine
    • B29K2027/18PTFE, i.e. polytetrafluorethene, e.g. ePTFE, i.e. expanded polytetrafluorethene
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2105/00Condition, form or state of moulded material or of the material to be shaped
    • B29K2105/25Solid
    • B29K2105/251Particles, powder or granules
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29KINDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2705/00Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts

Abstract

822,744. Moulding polytetrafluoroethylene. MONTECATINI SOC. GENERALE PER L'INDUSTRNI MINERARIA E CHIMICA. Sept. 19, 1956, No. 28650/56. Class 87(2). Polytetrafluoroethylene is used to mould an article, part of which is angularly disposed to the direction of applied pressure and is engaged with a metallic insert. Pow. dered P.T.F.E. is partially compressed, i.e. compressed enough to make the particles adhere to form a coherent body the mean density of which is less than that of P.T.F.E. itself. The body is then heated to sintering temperature, say 840‹F., and moulding pressure is applied to the heated body in a mould which contains a metallic insert having a re-entrant surface. Powdered P.T.F.E., 20 is placed in a mould having side walls 12 and a bottom punch 11 and is partially compressed in situ by pressure on a top punch 13 which has a core 14 and incorporates there between the insert 17 having a re-entrant surface 18. The mould is then heated to sintering temperature, sufficient pressure applied to fill the holes 18 with bosses 25 (not shown), and the heated P.T.F.E. is then quenched to room temperature. Alternatively the primary compression may be applied outside the mould. U.S.A. Specification 2,400,099 is referred to.
GB2865056A 1956-09-19 1956-09-19 Improvements relating to moulding polytetrafluorethylene Expired GB822744A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2865056A GB822744A (en) 1956-09-19 1956-09-19 Improvements relating to moulding polytetrafluorethylene

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2865056A GB822744A (en) 1956-09-19 1956-09-19 Improvements relating to moulding polytetrafluorethylene

Publications (1)

Publication Number Publication Date
GB822744A true GB822744A (en) 1959-10-28

Family

ID=10278947

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2865056A Expired GB822744A (en) 1956-09-19 1956-09-19 Improvements relating to moulding polytetrafluorethylene

Country Status (1)

Country Link
GB (1) GB822744A (en)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3223763A (en) * 1962-08-22 1965-12-14 Raybestos Manhattan Inc Method of making a metal reinforced plastic article
EP0486402A1 (en) * 1990-11-15 1992-05-20 COMPAGNIE PLASTIC OMNIUM Société Anonyme dite: Composite piston and method of manufacturing
GB2310629A (en) * 1996-02-29 1997-09-03 Applied Rubber Linings Ltd Method and apparatus for moulding a lining for a pipe or tube
WO1999046099A1 (en) * 1998-03-09 1999-09-16 The Gates Corporation Method of producing a plastic pulley with a metal insert

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3223763A (en) * 1962-08-22 1965-12-14 Raybestos Manhattan Inc Method of making a metal reinforced plastic article
EP0486402A1 (en) * 1990-11-15 1992-05-20 COMPAGNIE PLASTIC OMNIUM Société Anonyme dite: Composite piston and method of manufacturing
GB2310629A (en) * 1996-02-29 1997-09-03 Applied Rubber Linings Ltd Method and apparatus for moulding a lining for a pipe or tube
GB2310629B (en) * 1996-02-29 1999-06-30 Applied Rubber Linings Ltd Method and apparatus for moulding a lining for a pipe or tube
WO1999046099A1 (en) * 1998-03-09 1999-09-16 The Gates Corporation Method of producing a plastic pulley with a metal insert

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