GB828685A - Improvements relating to the moulding of thermoplastic articles - Google Patents

Improvements relating to the moulding of thermoplastic articles

Info

Publication number
GB828685A
GB828685A GB2817455A GB2817455A GB828685A GB 828685 A GB828685 A GB 828685A GB 2817455 A GB2817455 A GB 2817455A GB 2817455 A GB2817455 A GB 2817455A GB 828685 A GB828685 A GB 828685A
Authority
GB
United Kingdom
Prior art keywords
moulding
article
core
metal
bolt
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
GB2817455A
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.)
ALAN BIRKETT GLANVILL
EK Cole Ltd
Original Assignee
ALAN BIRKETT GLANVILL
EK Cole 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 ALAN BIRKETT GLANVILL, EK Cole Ltd filed Critical ALAN BIRKETT GLANVILL
Priority to GB2817455A priority Critical patent/GB828685A/en
Publication of GB828685A publication Critical patent/GB828685A/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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/40—Removing or ejecting moulded articles
    • B29C45/44—Removing or ejecting moulded articles for undercut articles
    • B29C45/4457—Removing or ejecting moulded articles for undercut articles using fusible, soluble or destructible cores
    • 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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/44—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles
    • B29C33/52—Moulds or cores; Details thereof or accessories therefor with means for, or specially constructed to facilitate, the removal of articles, e.g. of undercut articles soluble or fusible
    • 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
    • B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
    • B29C45/17—Component parts, details or accessories; Auxiliary operations
    • B29C45/26—Moulds
    • B29C45/2681—Moulds with rotatable mould parts

Landscapes

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

Abstract

828,685. Injection-moulding. COLE Ltd., E. K., TERRY, B. E., and GLANVILL, A. B. Jan. 4, 1957 [Oct. 4, 1955], No. 28174/55. Class 87(2). A method of moulding a thermoplastic article with " undercut " contours comprises utilising a member of fusible metal in the moulding operation and, after moulding melting the member by heating it to a temperature insufficient to deform the moulded article. Due to the heat conductivity of the fusible metal member moulding is effected before the metal reaches its melting point. Suitable metals are said to be Wood's metal, melting point 60 ' 5‹C., or " Cerrobend " (Registered Trade Mark), melting point 70‹C. An injection mould for a polythene article 8 comprises an upper plate 1 with injection sprue 7, a hollow centre plate 2 and a lower plate 3 having recess to locate a bolt 5 carrying a fusible metal core 6. After moulding the article 8 and core 6 is held stationary and the bolt 5 is rotated to unscrew the article and core. The core 6 and bolt 5 may both be of fusible metal when moulding small articles.
GB2817455A 1955-10-04 1955-10-04 Improvements relating to the moulding of thermoplastic articles Expired GB828685A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2817455A GB828685A (en) 1955-10-04 1955-10-04 Improvements relating to the moulding of thermoplastic articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2817455A GB828685A (en) 1955-10-04 1955-10-04 Improvements relating to the moulding of thermoplastic articles

Publications (1)

Publication Number Publication Date
GB828685A true GB828685A (en) 1960-02-24

Family

ID=10271460

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2817455A Expired GB828685A (en) 1955-10-04 1955-10-04 Improvements relating to the moulding of thermoplastic articles

Country Status (1)

Country Link
GB (1) GB828685A (en)

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2427188A1 (en) * 1978-05-31 1979-12-28 Nitto Electric Ind Co PROCESS FOR PRODUCING A MOLDED PLASTIC ARTICLE CONTAINING A HOLLOW PORTION OF COMPLICATED SHAPE
DE2908872A1 (en) * 1978-03-07 1980-01-31 Dunlop Ltd PLAY RACKET AND METHOD FOR THE PRODUCTION THEREOF
EP0138985A1 (en) * 1983-03-28 1985-05-02 Park Chemical Company Pressure molding process using salt cores and a composition for making cores
EP0178093A1 (en) * 1984-09-28 1986-04-16 Fry's Metals Limited An improved metal core for use in plastics moulding
US4747598A (en) * 1984-07-17 1988-05-31 Dunlop Limited A British Company Racket frame having interiorly located stringing lugs
US20120228801A1 (en) * 2011-03-11 2012-09-13 Wang Xiangji Injection method for hollow products, its fusible core and the method for making the fusible core thereof

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE2908872A1 (en) * 1978-03-07 1980-01-31 Dunlop Ltd PLAY RACKET AND METHOD FOR THE PRODUCTION THEREOF
US4440392A (en) * 1978-03-07 1984-04-03 Dunlop Limited One piece molded games racket
FR2427188A1 (en) * 1978-05-31 1979-12-28 Nitto Electric Ind Co PROCESS FOR PRODUCING A MOLDED PLASTIC ARTICLE CONTAINING A HOLLOW PORTION OF COMPLICATED SHAPE
EP0138985A1 (en) * 1983-03-28 1985-05-02 Park Chemical Company Pressure molding process using salt cores and a composition for making cores
EP0138985A4 (en) * 1983-03-28 1987-11-23 Park Chem Co Pressure molding process using salt cores and a composition for making cores.
US4747598A (en) * 1984-07-17 1988-05-31 Dunlop Limited A British Company Racket frame having interiorly located stringing lugs
EP0178093A1 (en) * 1984-09-28 1986-04-16 Fry's Metals Limited An improved metal core for use in plastics moulding
GB2165482A (en) * 1984-09-28 1986-04-16 Frys Metals Ltd An improved fusible metal core for use in plastics moulding
US20120228801A1 (en) * 2011-03-11 2012-09-13 Wang Xiangji Injection method for hollow products, its fusible core and the method for making the fusible core thereof

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