Mold and method for molding magnetic tape cassette

Details Mold and method for molding magnetic tape cassette Mold and method for molding magnetic tape cassette

1989-03-22

1992-01-28

Lowe, James

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Flash or sprue removal type

264 17, 264163, 264245, 264255, 2643288, 2643289, 264334, 425444, B29C 4516, B29C 4527

Patent

active

050842234

ABSTRACT:
A mold for forming a magnetic tape cassette and a method for multi-color molding a magnetic tape cassette or the like. Sprue-runners connected to submarine gates used in making at least portions of the cassette are formed with notches near the submarine gates to reduce the cross-sectional area of the sprue-runners. As result, the sprue-runners can be easily cut off from the body of the cassette by breaking the notched portions.

REFERENCES:
patent: 2799435 (1957-07-01), Abplanalp
patent: 3031722 (1962-05-01), Getz
patent: 3333300 (1967-08-01), Cohan
patent: 3822107 (1974-07-01), Wogerer
patent: 4726758 (1988-02-01), Sekine et al.
patent: 4840760 (1989-06-01), Oishi
patent: 4880587 (1989-11-01), Fichlseder et al.

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