Plastic article or earthenware shaping or treating: apparatus – Dough divider type including trap chamber – Rotating trap chamber pickup
Patent
1973-08-15
1976-03-30
Flint, Jr., J. Howard
Plastic article or earthenware shaping or treating: apparatus
Dough divider type including trap chamber
Rotating trap chamber pickup
425DIG209, 425DIG211, 425DIG213, B29D 2303
Patent
active
039471802
ABSTRACT:
A method and apparatus for combined injection moulding and blow forming of containers or objects of plastics material. A preform is formed on a mandrel by injection moulding. The mandrel with the preform is transferred from the injection mould to a blow forming mould and the preform is blow formed to the final product. It is characteristic of the invention that the preforms are formed in the injection mould and extracted from the injection mould at a higher rate than their forming in the blow forming mould, two or more preforms being simultaneously blow formed in two or more blow forming moulds. This arrangement has the advantage of providing complete independence of the two production cycles. The apparatus includes a conveyor for the mandrels carrying the preforms, this conveyor extending from an injection mould to a blow forming mould. The conveyor comprises a rail and carriages carried and guided by the rails, which carriages are movable independently of each other and of the rate of operation of the injection mould and blow forming mould. Two or more blow forming moulds are arranged along said conveyor.
REFERENCES:
patent: 3173176 (1965-03-01), Kobayasi
patent: 3479690 (1969-11-01), Hagen
patent: 3559245 (1971-02-01), Ryan
patent: 3579725 (1971-05-01), Hansen et al.
patent: 3781395 (1973-12-01), Uhlig
Bierman Jordan B.
Bierman Linda G.
Flint, Jr. J. Howard
Rowold Carl
Stempler Kenneth J.
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