Device for manufacturing plastic moldings and use of the device

Details Device for manufacturing plastic moldings and use of the device Device for manufacturing plastic moldings and use of the device

1993-10-12

1994-12-13

Kuhns, Allan R.

Plastic article or earthenware shaping or treating: apparatus

Means feeding fluent stock from plural sources to common...

425 4R, 4254051, 425417, 425577, 2643287, 264314, B29C 4513, B29C 4533

Patent

active

053724917

ABSTRACT:
In a device for manufacturing composite plastic mouldings, at least two different reaction mixtures are injected simultaneously through different sprues (24,26) into the cavity (28,28',28") of a mould (20,22). During the injection time of at least one of the reaction mixture, the cavity is subdivided into two or more mutually isolated regions. Following the injection of one reaction mixture, the separation between the regions of the cavity is removed and the at least partially liquid reaction mixtures converge in the separation plane. This device makes possible to join at least two materials having different properties in a single operation. It is useful for manufacturing bumper bars, spoilers, coach-work, and internal linings of motor vehicles.

REFERENCES:
patent: 4004868 (1977-01-01), Ohdate
patent: 4157883 (1979-06-01), Mares
patent: 4335068 (1982-06-01), Hemery
patent: 4477399 (1984-10-01), Tilton
patent: 4608213 (1986-08-01), Kurumizawa et al.
patent: 4714575 (1987-12-01), Preston
patent: 4755411 (1988-07-01), Wing et al.
patent: 4873044 (1989-10-01), Epel
patent: 5071605 (1991-12-01), Kawaguchi et al.

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