GB1003031A - Improvements in vacuum forming of shaped articles - Google Patents

Improvements in vacuum forming of shaped articles

Info

Publication number
GB1003031A
GB1003031A GB3609060A GB3609060A GB1003031A GB 1003031 A GB1003031 A GB 1003031A GB 3609060 A GB3609060 A GB 3609060A GB 3609060 A GB3609060 A GB 3609060A GB 1003031 A GB1003031 A GB 1003031A
Authority
GB
United Kingdom
Prior art keywords
sheet
box
vacuum forming
oct
frame
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
GB3609060A
Inventor
James Jones Hinton
Thomas Edward Horace Gray
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 GB3609060A priority Critical patent/GB1003031A/en
Priority to US142111A priority patent/US3207821A/en
Priority to DE19611429041 priority patent/DE1429041A1/en
Priority to FR876561A priority patent/FR1313125A/en
Priority to US451770A priority patent/US3319295A/en
Publication of GB1003031A publication Critical patent/GB1003031A/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
    • B29C51/42—Heating or cooling
    • B29C51/421—Heating or cooling of preforms, specially adapted for thermoforming

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)

Abstract

1,003,031. Vacuum forming. DUNLOP RUBBER CO. Ltd. Oct. 5, 1961 [Oct. 5, 1960; Jan. 19, 1961], Nos. 36090/60 and 2150/61. Heading B5A. In the vacuum forming of a large thermoplastic sheet, the pressure on the upper surface thereof is reduced as it softens so that it is retained in substantially planar configuration. Theremoplastic sheet 1 is gripped between frame 4, 5 and maintained by elastomeric strip 8 in sealing contact with vertically reciprocable box 10 as it is heated from above and below, by electrical elements arrayed in overlapping relationship within box 10 and lower heating unit 17, whilst the box 10 is evacuated to counteract any sagging tendencies of the sheet 1 until a drop in pressure of the order of the sheet weight/unit length is attained. The lower heating unit is removed and shaping former 22 raised to sealingly engage lower frame member 5 whereupon, after removal of the box 10, air is withdrawn through holes 25 in the former 22 to mould sheet 1 into contact with the surface thereof. The sealing strip 7 of frame 4, 5 may be retained by adhesive within a groove therein and may be of V-section. Plasticized or unplasticized vinyl resins, polyethylene and polypropylene and polyacrylates may be formed by the method into ship's hulls, dishes, buckets, plates and ashtrays. The seal 8 may be of silicone rubber, polyurethane or neoprene rubber. Specification 972,823 is referred to.
GB3609060A 1960-10-21 1960-10-21 Improvements in vacuum forming of shaped articles Expired GB1003031A (en)

Priority Applications (5)

Application Number Priority Date Filing Date Title
GB3609060A GB1003031A (en) 1960-10-21 1960-10-21 Improvements in vacuum forming of shaped articles
US142111A US3207821A (en) 1960-10-21 1961-10-02 Manufacture of shaped articles
DE19611429041 DE1429041A1 (en) 1960-10-21 1961-10-20 Process for the manufacture of shaped articles
FR876561A FR1313125A (en) 1960-10-21 1961-10-20 Process for manufacturing molded objects, in particular from thermoplastic sheets
US451770A US3319295A (en) 1960-10-21 1965-04-29 Shaped articles

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB3609060A GB1003031A (en) 1960-10-21 1960-10-21 Improvements in vacuum forming of shaped articles

Publications (1)

Publication Number Publication Date
GB1003031A true GB1003031A (en) 1965-09-02

Family

ID=10384842

Family Applications (1)

Application Number Title Priority Date Filing Date
GB3609060A Expired GB1003031A (en) 1960-10-21 1960-10-21 Improvements in vacuum forming of shaped articles

Country Status (1)

Country Link
GB (1) GB1003031A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102785355A (en) * 2012-08-16 2012-11-21 方亮生 Energy-saving heating device for suction molding machine

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102785355A (en) * 2012-08-16 2012-11-21 方亮生 Energy-saving heating device for suction molding machine

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