Plastic article or earthenware shaping or treating: apparatus – Distinct means to feed – support or manipulate preform stock... – Opposed registering coacting female molds
Patent
1975-11-24
1977-06-21
Spicer, Jr., Robert L.
Plastic article or earthenware shaping or treating: apparatus
Distinct means to feed, support or manipulate preform stock...
Opposed registering coacting female molds
249 83, 249 93, 425117, B29C 2714
Patent
active
040308669
ABSTRACT:
A molding apparatus for applying a protective coating to an irregularly sized article includes a mold shell having upper and lower portions with mold cavities of a preselected configuration in each portion to receive the article, such as a threaded fitting or coupling, for coating. The shell upper and lower portions are secured together to position the cavities in overlying relation and surrounding the article. Openings extend through the shell portions into the overlying cavities to expose the end portions of the article. Seal members are advanced into the openings and are secured as by threaded engagement to the end portions of the article. The seal members seal the openings and position the article within the cavities to form an annulus surrounding the article as defined by the surface of the cavities. A fluid inlet extends through the shell and into the annulus. A moisture resistant, resilient, polymeric liquid, such as polyvinylchloride, is introduced through the inlet and fills the annulus surrounding the article. After curing the liquid is bonded to the outer surface of the article to form an insulating, moisture resistant, resilient polymeric coating. The coating terminates on the threaded end portion of the article in annular resilient flange portions as defined by the configuration of the seal members. The annular flange portions extend radially of the threaded end portions regardless of the length thereof so that connecting members threadedly engaged to the end portions of the article contact the annular flanges to effect an insulating and moisture resistant seal therebetween.
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patent: 3355772 (1967-12-01), Kolberg
patent: 3499067 (1970-03-01), Rogers
patent: 3675888 (1972-07-01), Scaramucci
patent: 3771764 (1973-11-01), Miyauchi
Adams John M.
Price, Jr,. Stanley J.
Robroy Industries
Spicer, Jr. Robert L.
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