Axially compact compression mold

Details Axially compact compression mold Axially compact compression mold

1992-11-05

1994-07-05

Bushey, Charles S.

Plastic article or earthenware shaping or treating: apparatus

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

Female mold type means

264259, 264276, 425408, 4254501, 425DIG47, B29C 4300

Patent

active

053262441

ABSTRACT:
A mold assembly for molding an elastomeric sealing element onto an annular seal case includes a spring-biased outer sleeve that exerts a clamping force on the seal case during the molding cycle. During the mold closing stroke the leading edge of the sleeve engages the seal case before an uncured elastomeric charge reaches the seal case. The sleeve therefore acts as a flow barrier to limit any outward escape of elastomer from the mold cavity during molding. By isolating the clamping and flow limiting outer sleeve from the hydrostatic molding forces, the spring force applied to the outer sleeve may be reduced and the axial height of the mold assembly may also be reduced.

REFERENCES:
patent: 3392226 (1968-07-01), McKinven, Jr.
patent: 3475790 (1969-11-01), Bush et al.
patent: 3773454 (1973-11-01), Horve et al.
patent: 3950119 (1976-04-01), Reichenbach
patent: 3993420 (1976-11-01), Haas et al.
patent: 4249874 (1991-02-01), Reichenbach et al.
patent: 4555376 (1985-11-01), Butler
patent: 4580962 (1986-04-01), Haas
patent: 4824357 (1989-04-01), Christiansen

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