GB1003031A - Improvements in vacuum forming of shaped articles - Google Patents
Improvements in vacuum forming of shaped articlesInfo
- 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
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and shaping former 22 raised to sealingly engage lower frame member 5 whereupon, after removal of the box 10, air is withdrawn through holes 25 in the former 22 to mould sheet 1 into contact with the surface thereof.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.
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 |
FR876561A FR1313125A (en) | 1960-10-21 | 1961-10-20 | Process for manufacturing molded objects, in particular from thermoplastic sheets |
DE19611429041 DE1429041A1 (en) | 1960-10-21 | 1961-10-20 | Process for the manufacture of shaped articles |
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)
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 |
-
1960
- 1960-10-21 GB GB3609060A patent/GB1003031A/en not_active Expired
Cited By (1)
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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