Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – Female mold type means
Patent
1991-10-28
1992-06-30
Heitbrink, Tim
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
Female mold type means
264245, 2643287, 2643288, 425130, 425570, 425572, 425577, B29C 4516
Patent
active
051258161
ABSTRACT:
A method and apparatus for molding plastic articles in two colors, particularly, the bodies of magnetic tape cassettes, in which a strong bonding force is provided between the two portions without having to form a recess and projection on the joining edges of the two portions. A slide core, which is moved in and out of a primary molding cavity between the molding of the two portions of the article, is provided with a tubular passage having an opening within the primary molding cavity along edge portions of the slide core. The slide core is fully inserted into the primary molding cavity to mold the first portion, then partially withdrawn to form a secondary molding cavity in which the second portion is subsequently molded. After molding the first portion, an adhesive is injected through the tubular passage along the edges of the first portion which will join corresponding edges of the second portion to thereby firmly join the two portions.
REFERENCES:
patent: 3412431 (1968-11-01), Lemelson
patent: 4726758 (1988-02-01), Sekine et al.
Fuji Photo Film Co. , Ltd.
Heitbrink Tim
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