Plastic and nonmetallic article shaping or treating: processes – Direct application of fluid pressure differential to... – Starting material is nonhollow planar finite length preform...
Patent
1977-06-03
1979-08-21
Anderson, Philip
Plastic and nonmetallic article shaping or treating: processes
Direct application of fluid pressure differential to...
Starting material is nonhollow planar finite length preform...
264522, 264553, 264294, 264DIG66, B29C 1704
Patent
active
041653572
ABSTRACT:
Plastics foil is shaped in a deep drawing apparatus by being placed in a mould, while the foil is below its deformation temperature, having heated wall surfaces and by applying a pressure differential to the foil so that it progressively stretches and contacts the mould wall. The progressive heating and stretching of the foil ensures that the corners of the moulded article are not thinner than the remaining portions of the moulded article, thus reducing the amount of plastics material necessary for an article of given strength.
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Anderson Philip
Multivac Sepp Haggenmuller KG
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