GB680828A - Improvements in or relating to the moulding of plastic compositions - Google Patents

Improvements in or relating to the moulding of plastic compositions

Info

Publication number
GB680828A
GB680828A GB228250A GB228250A GB680828A GB 680828 A GB680828 A GB 680828A GB 228250 A GB228250 A GB 228250A GB 228250 A GB228250 A GB 228250A GB 680828 A GB680828 A GB 680828A
Authority
GB
United Kingdom
Prior art keywords
mould
mandrel
rubber
supports
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
GB228250A
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.)
Dunlop Rubber Co Ltd
Original Assignee
Dunlop Rubber Co 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 Dunlop Rubber Co Ltd filed Critical Dunlop Rubber Co Ltd
Priority to GB228250A priority Critical patent/GB680828A/en
Publication of GB680828A publication Critical patent/GB680828A/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
    • B29C45/26—Moulds
    • B29C45/36—Moulds having means for locating or centering 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
    • 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
    • B29C39/00—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor
    • B29C39/02—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles
    • B29C39/028—Shaping by casting, i.e. introducing the moulding material into a mould or between confining surfaces without significant moulding pressure; Apparatus therefor for making articles of definite length, i.e. discrete articles having an axis of symmetry

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Manufacturing & Machinery (AREA)
  • Heating, Cooling, Or Curing Plastics Or The Like In General (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

680,828. Moulding tubular articles from thermoplastic or thermosetting materials. DUNLOP RUBBER CO., Ltd., GOULDING, G. H. Jan. 17, 1951 [Jan. 28, 1950], No. 2282/50. Class 87 (ii). Tubular articles, e.g. rubber suspension units for motor-cycles, are moulded around a mandrel 7 supported in a mould both at its ends and between its ends, the intermediate supports being withdrawn before the moulded material sets. The mandrel 7, surrounded by an extruded tube of unvulcanized rubber, is laid in slots 6 in the lower force 2 of the mould and pressed down until the notched intermediate supports 10 sink into the uncured rubber and encounter the mandrel. The top force is located by means of dowels 4 and the mould heated in a press. After a slight delay, handle 14 is turned to rotate cams 15 and withdraw the supports 10. The rubber flows into the spaces left by the supports and the vulcanization is then completed. Pressure is then relieved and the mandrel withdrawn by pulling on the eye 8 before the mould is opened. The bottom force of the mould is provided with spew grooves 16, 18 and the top force is rebated at 19 to provide purchase for a pinch-bar when opening the mould. The method may be carried out by transfer moulding.
GB228250A 1950-01-28 1950-01-28 Improvements in or relating to the moulding of plastic compositions Expired GB680828A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB228250A GB680828A (en) 1950-01-28 1950-01-28 Improvements in or relating to the moulding of plastic compositions

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB228250A GB680828A (en) 1950-01-28 1950-01-28 Improvements in or relating to the moulding of plastic compositions

Publications (1)

Publication Number Publication Date
GB680828A true GB680828A (en) 1952-10-15

Family

ID=9736812

Family Applications (1)

Application Number Title Priority Date Filing Date
GB228250A Expired GB680828A (en) 1950-01-28 1950-01-28 Improvements in or relating to the moulding of plastic compositions

Country Status (1)

Country Link
GB (1) GB680828A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1159161B (en) * 1958-04-02 1963-12-12 Continental Gummi Werke Ag Method and device for the production of high-pressure hoses
CN111688166A (en) * 2020-06-29 2020-09-22 安徽天航机电有限公司 Self-adaptive molding device for pressure-injection rubber type elastic handle and one-step molding method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1159161B (en) * 1958-04-02 1963-12-12 Continental Gummi Werke Ag Method and device for the production of high-pressure hoses
CN111688166A (en) * 2020-06-29 2020-09-22 安徽天航机电有限公司 Self-adaptive molding device for pressure-injection rubber type elastic handle and one-step molding method thereof

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