B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/1074
B29C 51/42 (2006.01) B29C 51/04 (2006.01)
Patent
CA 1162014
.theta. METHOD AND APPARATUS FOR PRODUCING CONTAINERS FROM THERMOPLASTIC SHEET MATERIAL ABSTRACT OF THE DISCLOSURE A method of and an apparatus for producing containers from thermoplastic sheet material are disclosed. The sheet material is heated to its plastic state and clamped at its periphery. Then a moulding die is advanced substantially normally towards and against the clamped heated sheet ma- terial. The moulding die has a temperature below the tempe- rature of the heated clamped sheet material and is provided with a projecting peripheral portion and/or a recessed central portion directed towards the sheet material. By further ad- vancing the moulding die by a predetermined amount against the sheet material, this is deformed and shaped into the desired container. A cooling air flow is directed against the clamped heated sheet material in a region thereof adja- cent to the peripheral portion of the moulding die to avoid reduced wall thickness at the edge and corner regions of the container by excessive stretching of the sheet material. Thus, stable containers of uniform wall thickness may be produced.
372766
Goudreau Gage Dubuc
Multivac Sepp Haggenmuller Kg
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