Method and apparatus for molding a magnetic disk cartridge shutt

Details Method and apparatus for molding a magnetic disk cartridge shutt Method and apparatus for molding a magnetic disk cartridge shutt

1993-09-27

1995-02-14

Heitbrink, Tim

Plastic and nonmetallic article shaping or treating: processes

Mechanical shaping or molding to form or reform shaped article

Shaping against forming surface

425577, 425DIG58, B29C 4544

Patent

active

053893298

ABSTRACT:
A molding method and a mold for molding a plastic shutter, wherein a plate-like member with a free end is extended into a molding cavity to define an injection together with at least two opposed planar plates. A thrust member, which is movable in the direction of thickness of the plate-like member and which applies a thrust force to the plate-like member, is provided close to the free end of the plate-like member. In a state where the amount of movement of the thrust member is adjusted to within a predetermined range as viewed in the thickness direction of the plate-like member, on the basis of the position where the forward end of the thrust means comes in contact with the plate-like member, molten resin is injected into the injection space, thereby forming the plastic shutter.

REFERENCES:
patent: 3843088 (1974-10-01), McLoughlin et al.
patent: 4923388 (1990-05-01), Nakamura

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