B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
18/713
B29C 45/40 (2006.01) B29C 45/32 (2006.01)
Patent
CA 1143525
ABSTRACT OF THE DISCLOSURE An injection-molding machine has a fixed and a movable outer platen bracketing amovable intermediate platen, the latter having a runner system conducted via an extensible or flexible conduit to a source of molten plastic material to be injected into cavities defined by respective pairs of mold portions supported by the three platens, the cavities being formed in part by cores carried on the outer mold portions. A stripper plate inserted between each pair of mold portions is articulated via a spring-loaded lost-motion link to a respective eccentric pin on a pinion which is rotatably mounted on the intermediate platen and meshes with a pair of racks respectively secured to the two outer platens; this linkage is duplicated on opposite sides of the mold. In an initial phase of a mold-opening stroke, the stripper plates move outwardly under spring pressure while remaining in contact with their respective outer mold portions whose cores still retain the freshly molded articles. When the limit of the lost-motion travel is reached, the stripper plates are slowly lifted off their adjoining mold portions to detach the molded articles from the cores.
343537
Schad Robert D.
Wright John B.
Husky Injection Molding Systems Inc.
Swabey Ogilvy Renault
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