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GB875538A - Improvements in or relating to moulding dies - Google Patents

Improvements in or relating to moulding dies

Info

Publication number
GB875538A
GB875538A GB8269/58A GB826958A GB875538A GB 875538 A GB875538 A GB 875538A GB 8269/58 A GB8269/58 A GB 8269/58A GB 826958 A GB826958 A GB 826958A GB 875538 A GB875538 A GB 875538A
Authority
GB
United Kingdom
Prior art keywords
die
matrices
moulding
elevations
moulded
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
GB8269/58A
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.)
Philips Electrical Industries Ltd
Original Assignee
Philips Electrical 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 Philips Electrical Industries Ltd filed Critical Philips Electrical Industries Ltd
Publication of GB875538A publication Critical patent/GB875538A/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
    • B29C33/00—Moulds or cores; Details thereof or accessories therefor
    • B29C33/56—Coatings, e.g. enameled or galvanised; Releasing, lubricating or separating agents

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

875,538. Moulding gramophone records. PHILIPS ELECTRICAL INDUSTRIES Ltd. March 14, 1958 [March 18, 1957], No. 8269/58. Class 87(2). In a die for moulding e.g. gramophone records from thermosetting or thermoplastic material, and comprising upper and lower matrices 5, 6 secured to supports 1, 2 having elevated portions 3, 4, the distance between the matrices 5, 6 radially outwardly of the elevations 3, 4 when the die is closed is greater than the thickness of the article to be moulded so that excess material expands freely into the space beyond the elevations 3, 4. Clamping rings 7, 8 for the matrices may be tapered as at 9, 10 so that on opening the die the moulded record is secured to the die half 1 not having cavity-forming projections. Alternatively one die half may be provided with hooks or pins around which the excess material is pressed.
GB8269/58A 1957-03-18 1958-03-14 Improvements in or relating to moulding dies Expired GB875538A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
NL875538X 1957-03-18

Publications (1)

Publication Number Publication Date
GB875538A true GB875538A (en) 1961-08-23

Family

ID=19851374

Family Applications (1)

Application Number Title Priority Date Filing Date
GB8269/58A Expired GB875538A (en) 1957-03-18 1958-03-14 Improvements in or relating to moulding dies

Country Status (1)

Country Link
GB (1) GB875538A (en)

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