Mold

Details Mold Mold

1986-10-10

1988-02-23

Chiesa, Richard L.

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

With means to cause relative movement between mold and charger

264245, 2643288, 425577, B29C 4504

Patent

active

047267585

ABSTRACT:
A mold for stepwise molding by two or more injection shots of different materials or colors comprises fixed and movable mold halves and a slide core which combinedly form a first cavity and, with the slide core moved down, a second cavity for the shots to form a molded article of unitary structure, such as a housing section of an audio cassette tape with a see-through window. Ribs are formed on the slide core along its peripheries, and a land projection is formed on the inner side of the fixed mold half to be in contact with the molding surface of the slide core recessed with respect to the ribs. The inner peripheral wall faces of the ribs and the peripheral wall faces of the land projection of the fixed mold half are spaced apart to remain out of contact during mold clamping.

REFERENCES:
patent: 2612666 (1952-10-01), McGarigal
patent: 3466700 (1969-09-01), Harrison
patent: 3702750 (1972-11-01), Veneria
patent: 3804576 (1974-04-01), Hehl
patent: 3832110 (1974-08-01), Hehl
patent: 4383819 (1983-05-01), Letica
patent: 4440820 (1984-04-01), Shiho et al.
patent: 4531703 (1985-07-01), Underwood
patent: 4610621 (1986-09-01), Taber et al.
patent: 4620958 (1986-11-01), Wiechard
patent: 4676941 (1987-06-01), Shiho et al.

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