B - Operations – Transporting – 29 – C
Patent
B - Operations, Transporting
29
C
B29C 45/14 (2006.01) B29C 45/16 (2006.01)
Patent
CA 2130925
The present invention relates to a method and apparatus for producing insert molded articles. The method is comprised of the steps of preforming a patterned insert material clamped at end parts thereof by a clamping unit into a predetermined shape corresponding to the shape of a cavity formation face of a male die or a female die of an injection molding die by a preforming unit. The insert material is then trimmed to remove the unnecessary portion of the preformed material. A trimming unit accomplishes this step. The trimming is done so as not to allow the insert material to project from the peripheral edge of the surface of a three dimensional molded article to be formed of molding resin. The preformed and trimmed insert material is then set at the cavity formation face of the male or female die of the injection molding die. The male and female dies are then clamped to form a cavity by the cavity formation faces. Resin is then injected into the cavity to produce the article. The article is taken from the injection molding die after the molding resin is cooled and softened. At the preforming time, a preforming die having a projecting part corresponding in shape to the cavity formation face of the injection molding die is used, so that the patterned insert material can be preformed corresponding to the shape of the projecting part of the preforming die. Moreover, prior to the preforming of the patterned inset material, the patterned insert material can be heated and softened after, before, or while being held in touch with the top face of the projecting part of the preforming die, so that the patterned insert material is preformed to trace the projecting part of the preforming die.
Okuno Shiroh
Yamazaki Seiichi
Kirby Eades Gale Baker
Nissha Printing Co. Ltd.
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