GB1202371A - Improvements in or relating to moulds - Google Patents

Improvements in or relating to moulds

Info

Publication number
GB1202371A
GB1202371A GB2016767A GB2016767A GB1202371A GB 1202371 A GB1202371 A GB 1202371A GB 2016767 A GB2016767 A GB 2016767A GB 2016767 A GB2016767 A GB 2016767A GB 1202371 A GB1202371 A GB 1202371A
Authority
GB
United Kingdom
Prior art keywords
mould
withdrawal
recess
article
male
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
GB2016767A
Inventor
Kenneth Ernest Andrews
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.)
BP PLC
Original Assignee
BP PLC
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 BP PLC filed Critical BP PLC
Priority to GB2016767A priority Critical patent/GB1202371A/en
Priority to NL6806019A priority patent/NL6806019A/xx
Priority to DE19681778445 priority patent/DE1778445A1/en
Priority to FR1564282D priority patent/FR1564282A/fr
Publication of GB1202371A publication Critical patent/GB1202371A/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
    • B29C51/00—Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26—Component parts, details or accessories; Auxiliary operations
    • B29C51/30—Moulds
    • B29C51/34—Moulds for undercut articles

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Containers Having Bodies Formed In One Piece (AREA)

Abstract

1,202,371. Sheet forming. BRITISH PETROLEUM CO. Ltd. 24 April, 1968 [2 May, 1967], No. 20167/67. Heading B5A. A hollow article having an undercut recess, such as an egg-box lid, is formed from a sheet of foamed polystyrene between co-operating male and female moulds, the former of which is provided with a recess and the latter with a corresponding projection. The projection as shown in Fig. 6, is carried by a wall 22 which is slidable upwardly and outwardly relative to the rest of the mould and which is biased in its uppermost position by a spring 23 and the recess, as shown in Fig. 3, is provided with a pivotable base portion 19. In operation, after the article has been formed, the male mould is withdrawn, the portion 19 pivoting downwardly to facilitate the withdrawal. During the withdrawal the wall 22 is slid by the spring to its uppermost position so that after complete withdrawal and removal of the male mould the formed article may be lifted from the female mould.
GB2016767A 1967-05-02 1967-05-02 Improvements in or relating to moulds Expired GB1202371A (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
GB2016767A GB1202371A (en) 1967-05-02 1967-05-02 Improvements in or relating to moulds
NL6806019A NL6806019A (en) 1967-05-02 1968-04-26
DE19681778445 DE1778445A1 (en) 1967-05-02 1968-04-30 Press mold for the production of containers, especially for eggs and the like.
FR1564282D FR1564282A (en) 1967-05-02 1968-04-30

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2016767A GB1202371A (en) 1967-05-02 1967-05-02 Improvements in or relating to moulds

Publications (1)

Publication Number Publication Date
GB1202371A true GB1202371A (en) 1970-08-19

Family

ID=10141494

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2016767A Expired GB1202371A (en) 1967-05-02 1967-05-02 Improvements in or relating to moulds

Country Status (4)

Country Link
DE (1) DE1778445A1 (en)
FR (1) FR1564282A (en)
GB (1) GB1202371A (en)
NL (1) NL6806019A (en)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE10113327A1 (en) * 2001-03-20 2002-09-26 Hans-Werner Breuer Tool for the production and demolding of molded parts, especially plastic molded parts

Also Published As

Publication number Publication date
DE1778445A1 (en) 1972-01-20
NL6806019A (en) 1968-11-04
FR1564282A (en) 1969-04-18

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Legal Events

Date Code Title Description
PS Patent sealed
PLNP Patent lapsed through nonpayment of renewal fees