GB1127762A - Improvements in the production of castings from mouldable synthetic plastics materials - Google Patents

Improvements in the production of castings from mouldable synthetic plastics materials

Info

Publication number
GB1127762A
GB1127762A GB2303668A GB2303668A GB1127762A GB 1127762 A GB1127762 A GB 1127762A GB 2303668 A GB2303668 A GB 2303668A GB 2303668 A GB2303668 A GB 2303668A GB 1127762 A GB1127762 A GB 1127762A
Authority
GB
United Kingdom
Prior art keywords
mould
moulding
membrane
plastics
negative pressure
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
GB2303668A
Inventor
Geoffrey Matthews
David Ernest Matthews
Stanley Norman Ford
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.)
4D Research and Development Co Ltd
Original Assignee
4D Research and Development 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 4D Research and Development Co Ltd filed Critical 4D Research and Development Co Ltd
Priority to GB2303668A priority Critical patent/GB1127762A/en
Publication of GB1127762A publication Critical patent/GB1127762A/en
Expired legal-status Critical Current

Links

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/36—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article
    • B28B7/364—Linings or coatings, e.g. removable, absorbent linings, permanent anti-stick coatings; Linings becoming a non-permanent layer of the moulded article of plastic material or rubber
    • 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
    • B29C37/00—Component parts, details, accessories or auxiliary operations, not covered by group B29C33/00 or B29C35/00
    • B29C37/0003—Discharging moulded articles from the mould

Landscapes

  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Forms Removed On Construction Sites Or Auxiliary Members Thereof (AREA)

Abstract

1,127,762. Moulding plastics panels. 4D RESEARCH & DEVELOPMENT CO. Ltd. 6 Oct., 1965, No. 23036/68. Divided out of 1,127,761. Heading B5A. Synthetic plastics panel mouldings of glasslike surface, which may be glass-fibre reinforced or incorporate reinforcing elements or cores of insulating material such as polystyrene, wood wool or foamed concrete, are formed by pouring, spraying or injecting the plastics into a preferably vibrated mould 1 into the cavity whereof is drawn, under a negative pressure of 2 to 28 inches of mercury, a membrane 4 of extendability of 1000% or more; the negative pressure is maintained during the setting period of the resin and the moulding is released by introducing atmospheric or super-atmospheric pressure between the membrane 4 and the mould. The mould sides are hinged to the base on which may be mounted a configurating template 8. The mould may be made of wood, whereby the outer surfaces may be rendered impervious by a coating of varnish, and the interior moulding surfaces thereof are pervious to air. Part of the moulding material may be applied to the membrane before this is fully drawn on to the mould.
GB2303668A 1965-10-06 1965-10-06 Improvements in the production of castings from mouldable synthetic plastics materials Expired GB1127762A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB2303668A GB1127762A (en) 1965-10-06 1965-10-06 Improvements in the production of castings from mouldable synthetic plastics materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB2303668A GB1127762A (en) 1965-10-06 1965-10-06 Improvements in the production of castings from mouldable synthetic plastics materials

Publications (1)

Publication Number Publication Date
GB1127762A true GB1127762A (en) 1968-09-18

Family

ID=10189071

Family Applications (1)

Application Number Title Priority Date Filing Date
GB2303668A Expired GB1127762A (en) 1965-10-06 1965-10-06 Improvements in the production of castings from mouldable synthetic plastics materials

Country Status (1)

Country Link
GB (1) GB1127762A (en)

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