B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/710, 18/714
B29C 45/56 (2006.01) B29C 45/27 (2006.01)
Patent
CA 1148315
ABSTRACT A method and apparatus are described. In the method, a thermosetting molding material, such as a phenolic molding composition, is initially heated and plasticized. The plasticized mass is passed through an injection nozzle and then 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. The feed stream is interrupted, and the molds are then completely closed to press and cure the plasticized material enclosed within them. The cured, finished article is removed from the mold and the process repeated. In the apparatus, means are provided for accomplishing the foregoing process.
342230
Bainbridge Robert W.
Dannels W. Andrew
Occidental Chemical Corporation
Sherman
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