Apparatus for molding a recorded disc

Details Apparatus for molding a recorded disc Apparatus for molding a recorded disc

1982-02-24

1983-04-12

Pavelko, Thomas P.

Plastic article or earthenware shaping or treating: apparatus

Preform severing means

Severing means is perforator

425810, 264107, 264155, 264163, B29D 1700

Patent

active

043796869

ABSTRACT:
A molding apparatus for molding a recorded disc includes a pair of mold plates adapted to form a mold cavity therein and a center hole forming pin slidably mounted in one of the mold plates. The center hole forming pin is larger in diameter than the hole to be formed and has a projection on its end which is of a diameter equal to the hole to be formed and a length about one-half the length of the hole to be formed. The other mold plate includes a projection extending therefrom of a diameter equal to the diameter of the hole to be formed and a length one-half the length of the hole. In the molding of the disc the projection on the center hole forming pin engages the projection on the other mold plate to form a hole in which a flash is spaced from the edges of the hole.

REFERENCES:
patent: 941291 (1909-11-01), Wickes
patent: 1372992 (1921-03-01), Beadle
patent: 1442856 (1923-01-01), Christensen
patent: 2853737 (1958-09-01), Harlow
patent: 3662051 (1972-05-01), Harlow et al.
patent: 3671158 (1970-03-01), Rand et al.
patent: 3989436 (1976-11-01), McNeely et al.
patent: 4334849 (1982-06-01), Bock

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