Seal for molded part insert

Details Seal for molded part insert Seal for molded part insert

1988-04-28

1989-09-19

Silbaugh, Jan H.

Plastic article or earthenware shaping or treating: apparatus

Distinct means to feed, support or manipulate preform stock...

And means to apply stress to preform and uniting in stressed...

249 91, 26427211, 264275, 264276, 2643289, 425116, 425121, 425806, B29C 4514

Patent

active

048676632

ABSTRACT:
An apparatus for sealing around an insert in a molded part to avoid the escape of flash including a mold cavity cooperatively defined by at least two mold blocks, at least one of the mold blocks having at least one insert opening communicating with the cavity. A plunger chamber is substantially co-axial to the insert opening and communicates with the cavity via the insert opening, the plunger chamber having generally greater radial dimensions than the insert opening, thereby defining a generally inwardly-directed flange with respect to the walls of the plunger chamber. The surface of the flange remote from the cavity constitutes a seating surface within the insert opening. A resilient seal is fitted within the plunger chamber against the seating surface in proximity to the insert. A plunger is positioned within the plunger chamber for relative movement generally towards and away from the cavity to compress the resilient seal against the seating surface.

REFERENCES:
patent: 2580816 (1952-01-01), Morin
patent: 2803851 (1957-08-01), Baunlich et al.
patent: 2812548 (1957-11-01), Quinche et al.
patent: 2937409 (1960-05-01), Cole
patent: 3238287 (1966-03-01), Chapman
patent: 3536806 (1970-10-01), Jackson
patent: 3690800 (1972-09-01), Schwab et al.
patent: 3825378 (1974-07-01), Dart et al.
patent: 4030872 (1977-06-01), Parmann
patent: 4372740 (1983-02-01), Kuramochi et al.
patent: 4511317 (1985-04-01), Bandoh
patent: 4724113 (1988-02-01), Lee

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