Mold for producing a multilayer molded article and a method for producing a multilayer molded article
AssigneeSumitomo Chemcial Company, Limited
InventorsYoshitaka Kobayashi, Nobuhiro Usui
Life of this patent
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Abstract
An inventive mold is adapted to adhere skin materials having a boundary portion and a resin to each other, and is provided with a resin blocking member which is so embedded as to extend substantially along the boundary portion of the skin materials placed in the mold, and a movable member for projecting the resin blocking member from a molding surface. If such a mold is used, a flow of the resin supplied into the mold can be controlled by projecting the resin blocking member to thereby control an arrival timing of the resin at the boundary portion. Thus, displacement of the boundary portion and wrinkling can be securely prevented from occurring.
Claims10
A method for producing a multilayer molded article, comprising the steps of:
- placing a first skin material and a second skin material adjacent to each other on the same plane between a pair of male and female mold parts,
- supplying a molten thermoplastic resin to the rear surface of the first skin material from a first gate formed in a molding surface of the mold part located at the rear sides of the skin materials and supplying a molten thermoplastic resin to the rear surface of the second skin material from a second gate formed in the molding surface, and
- adhering the skin materials and the molten thermoplastic resins to each other to produce a multilayer molded article,
- wherein, when the thermoplastic resins are supplied, a resin blocking member is projected from the molding surface towards the rear sides of the skin materials, the resin blocking member being embedded in the molding surface so as to extend substantially along a boundary portion the first skin and said second skin material,
- and arrival timings of the resins at the boundary portion are controlled by blocking a flow of the resin toward the boundary portion with the resin blocking member and withdrawing the resin blocking member into the mold part before filling of the resin from the first gate into a mold cavity is completed and before filling of the resin from the second gate into a mold cavity is completed.
Dependencies are inferred from the claim text.