Abstract: A composite molded plastic brake piston which comprises a phenolic resin body that is co-molded to a skin which comprises a phenolic sheet molding compound. The skin adheres to at least one surface of the article. The phenolic resins of the two compounds are cross-linked into a molded product which resists separation by mechanical, chemical or thermal methods.

Abstract: A method and apparatus are described. A thermosetting molding material, suitably a synthetic resin composition such as a phenolic molding composition, is initially heated and plasticized. The plasticized mass is passed as a stream through an injection nozzle which is maintained at a temperature sufficiently high to keep the mass in a plasticized condition but sufficiently low to avoid any substantial curing or setting-up of the mass. The plasticized mass is next passed through a temperature-controlled zone maintained at a temperature sufficiently high to keep the mass in a plasticized condition but sufficiently low to avoid any substantial curing or setting-up of the mass. The plasticized stream is passed into a partially open, heated mold. The mold cavity is maintained at temperatures sufficiently high to cure the thermosetting molding material.

Abstract: The apparatus of the present invention includes a stationary assembly and a movable assembly. The stationary assembly is comprised of a stationary platen which has a heat plate mounted thereon, a temperature-controlled sprue bushing mounted in the heat plate and a plurality of mold faces positioned on the heat plate surrounding the periphery of the sprue bushing. The movable assembly is comprised of a movable platen which has a heat plate mounted thereon and a plurality of mold faces, corresponding to, and adapted to be aligned with, the mold faces on the stationary assembly. Means are provided to move the movable assembly into close proximity with the stationary assembly to form partially open mold cavities. Means are provided to feed a supply of thermosetting molding material through the sprue bushing into a manifold area and into the partially open mold cavities. Means are provided to completely close the mold cavities and place the apparatus in a compression stage.

Abstract: The apparatus of the present invention includes a stationary assembly and a movable assembly. The stationary assembly is comprised of a stationary platen which has a heat plate, a temperature-controlled sprue bushing and a mold face positioned thereon. The movable assembly is comprised of a movable platen which has a heat plate mounted thereon and a mold face, corresponding to, and adapted to be aligned with, the mold face on the stationary assembly to form a partially open mold cavity. Means are provided to feed a supply of thermosetting molding material through the sprue bushing into the partially open mold cavity. Means are provided to completely close the mold cavity and place the apparatus in a compression stage.

Abstract: A method and apparatus are described. A thermosetting molding material, suitably a synthetic resin composition such as a phenolic molding composition, is initially heated and plasticized. The plasticized mass is passed as a stream through an injection nozzle which is maintained at a temperature sufficiently high to keep the mass in a plasticized condition but sufficiently low to avoid any substantial curing or setting-up of the mass. The plasticized mass is next passed through a temperature-controlled manifold maintained at a temperature sufficiently high to keep the mass in a plasticized condition but sufficiently low to avoid any substantial curing or setting-up of the mass. In the manifold the plasticized stream is divided into two or more smaller streams which are passed through a plurality of outlets into a plurality of partially open, heated molds. The mold cavities are maintained at temperatures sufficiently high to cure the thermosetting molding material.

Abstract: An improved molding apparatus for injection-compression molding thermosetting materials is described. The apparatus comprises a stationary platen assembly, a moveable platen assembly and a feed nozzle assembly.The stationary assembly is comprised of a stationary platen member, a heated plate mounted on the support plate and a plurality of mold faces mounted on the heat plate.The movable assembly is comprised of a moveable platen member, a heated plate mounted thereon and a plurality of mold faces mounted on the heat plate aligned with the mold faces on the stationary assembly.The feed, or injection, nozzle assembly is comprised of a cylindrical nozzle member, having an internal temperature controlling means, and a plurality of feed outlets positioned on the periphery.

Abstract: An improved nozzle feed assembly is described. The assembly includes temperature-controlled member, preferably cylindrical in shape, having a closed end and an open end. The open end is fitted with standard threads to facilitate attachment of the nozzle member to the feed barrel of a conventional screw-type molding machine. The nozzle member has an internal temperature controlling means and a plurality of feed outlets positioned on the periphery of the nozzle member near the closed end. The temperature maintained in the nozzle member is sufficiently high to maintain the thermosetting molding material within the nozzle member in a plasticized state and sufficiently low that no substantial curing of the thermosetting molding material takes place. In an alternate mode, the assembly includes a sleeve member positioned around the periphery of the nozzle member and moveable to cover and uncover the feed outlets in the periphery of the nozzle member.

Abstract: A method and apparatus are described. A thermosetting molding material, suitably a synthetic resin composition such as a phenolic molding composition, is initially heated and plasticized. The plasticized mass is passed as a stream through an injection nozzle which is maintained at a temperature sufficiently high to keep the mass in a plasticized condition but sufficiently low to avoid any substantial curing or setting-up of the mass. The plasticized mass is next passed through a temperature-controlled manifold maintained at a temperature sufficiently high to keep the mass in a plasticized condition but sufficiently low to avoid any substantial curing or setting-up of the mass. In the manifold the plasticized stream is divided into two or more smaller streams which are passed through a plurality of outlets into a plurality of partially open, heated molds. The mold cavities are maintained at temperatures sufficiently high to cure the thermosetting molding material.