Method of reaction injection molding a valve

Details Method of reaction injection molding a valve Method of reaction injection molding a valve

1993-08-05

1995-04-25

Woo, Jay H.

Plastic and nonmetallic article shaping or treating: processes

With severing, removing material from preform mechanically,...

Flash or sprue removal type

29890127, 264275, 264278, 2643286, 26432812, 4251291, B29C 4514, B29C 4538

Patent

active

054096545

ABSTRACT:
A mold and method of forming a butterfly valve and the novel valve formed. The concept includes providing a valve skeleton having a body portion, a hollow neck extending from the body portion to receive a valve stem and a cruciform-shaped actuator plate portion on the hollow neck, suspending the valve skeleton in a mold cavity in inverted orientation, and injecting reaction injection molding polymer by laminar flow into the bottom of the mold cavity with an amount of polymer sufficient to fill the space from the bottom up, encapsulating the skeleton, and overfill the space to force the leading edge of the polymer out the top of said space into said escape chamber to entrap residual gases into a severable offal member. The polymer encapsulates the cruciform-shaped actuator plate while filling the corner spaces thereof, except for fastener orifices which form adjacent the cruciform legs. A gate at the bottom of the mold assures laminar flow of polymer into the mold cavity. The valve skeleton may have a plurality of radially extending mounting leg portions fitting into lug-receiving cavities of the mold including at least one mounting lug-receiving cavity projecting radially outwardly and upwardly, the mold cavity including an upwardly oriented flow passage up from said at least one lug-receiving cavity to the polymer-receiving escape chamber, for flow of air from the at least one lug-receiving cavity through the flow passage to the escape chamber.

REFERENCES:
patent: Re26405 (1968-06-01), Killian
patent: 2130254 (1938-09-01), Visman
patent: 2178774 (1939-11-01), Bogoslowsky
patent: 2382200 (1945-08-01), Brunner
patent: 2421928 (1947-06-01), Davis
patent: 2571259 (1951-10-01), Kusiak
patent: 2724864 (1955-11-01), Krotz
patent: 3050781 (1962-08-01), Killian
patent: 3072139 (1963-01-01), Mosites
patent: 3122353 (1964-02-01), Killian
patent: 3148896 (1964-09-01), Chu
patent: 3173650 (1965-03-01), Cotterman et al.
patent: 3186682 (1965-06-01), Pierson et al.
patent: 3271845 (1966-09-01), Breher
patent: 3318567 (1967-05-01), Gifford
patent: 3438388 (1969-04-01), Schenck, Jr.
patent: 3537164 (1970-11-01), Williams
patent: 3537683 (1970-11-01), Snell, Jr.
patent: 3565394 (1971-02-01), Smith
patent: 3597820 (1971-08-01), Schenck, Jr.
patent: 3660552 (1972-05-01), Hinz et al.
patent: 3667726 (1972-06-01), Church et al.
patent: 3670071 (1972-06-01), Walchle et al.
patent: 3675677 (1972-07-01), Scaramucci
patent: 3675888 (1972-07-01), Scaramucci
patent: 3728053 (1973-04-01), Stillhard et al.
patent: 3738383 (1973-06-01), David
patent: 3750698 (1973-08-01), Walchle et al.
patent: 3771764 (1973-11-01), Miyauchi
patent: 3790130 (1974-02-01), Getty, Jr.
patent: 3840042 (1974-10-01), Brundage
patent: 3904173 (1975-09-01), Naylor
patent: 3913892 (1975-10-01), Ersfeld et al.
patent: 3917792 (1975-11-01), Conacher, Jr.
patent: 3940108 (1976-02-01), Edwards
patent: 3958595 (1976-05-01), Al et al.
patent: 3981671 (1976-09-01), Edwards
patent: 3984510 (1976-10-01), Chandra et al.
patent: 3990675 (1976-11-01), Bonafous
patent: 4025050 (1977-05-01), Manki et al.
patent: 4129636 (1978-12-01), Boden et al.
patent: 4146206 (1979-03-01), Malloy et al.
patent: 4190711 (1980-02-01), Zdrahala et al.
patent: 4201365 (1980-05-01), Paptzun et al.
patent: 4259980 (1981-04-01), Muller
patent: 4317558 (1982-03-01), Sherlaw
patent: 4470785 (1984-09-01), Koorevaar
patent: 4510965 (1985-04-01), Peroux et al.
patent: 4516597 (1985-05-01), Ueda
patent: 4580593 (1986-04-01), Herberholz
patent: 4580603 (1986-04-01), Schoen
patent: 4604254 (1986-08-01), Yamamoto et al.
patent: 4646407 (1987-03-01), Mayhew, Jr.
patent: 4740347 (1988-04-01), Sloan, Jr. et al.
patent: 4774750 (1988-10-01), Platusich
patent: 4777977 (1988-10-01), Platusich
patent: 4826133 (1989-05-01), Hiltebrand
patent: 4899775 (1990-02-01), Calvin
patent: 4899984 (1990-02-01), Strickler et al.
patent: 4939830 (1990-07-01), Janian
patent: 4944325 (1990-07-01), Baldwin et al.
patent: 4957677 (1990-09-01), Katoh et al.
patent: 4998708 (1991-03-01), Pavanel
patent: 5098064 (1992-03-01), Daly et al.

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