Injection mold for laminated article
AssigneeNissan Motor Co., Ltd.
InventorKeiki Ohdate
Life of this patent
Estimating the term…
Abstract
To form a laminated plastic article having at least one thermoset layer, a first resin is injected into a mold from a first nozzle and solidified as usual. Then the dies are separated by a predetermined distance to create an additional cavity for a second resin layer on the solidified resin and at the same time provide a fluid passage, which connects the cavity to a second nozzle and is defined and sealed by opposite faces of the dies at their particularly shaped portions. The passage is unsealed by thoroughly separating the dies after injection of a second resin therethrough and solidification of the resin.
Claims5
A mold for the injection molding of a laminated article plastic having a first layer of a first resin and a second layer of a different second resin, the mold comprising:
- a stationary die plate;
- a movable die plate juxtaposed against said stationary die plate in such an arrangement that the contacted end faces of said stationary and movable die plates are locally spaced from each other to form a cavity corresponding in shape and dimensions to said first layer and that the dimensions of said cavity are enlarged when said movable die plate is parted from said stationary die plate;
- a first sprue formed in said stationary die plate for providing fluid communication between said cavity and the atmosphere;
- and
- a second sprue formed in said movable die plate, said second sprue being defined by opposite end faces of said stationary and movable die plates, said opposite end faces being shaped such that said cavity is prevented from communicating with the atmosphere through said second sprue when said stationary and movable die plates are in full contact but allowed to communicate with the atmosphere through said second sprue when said movable die plate is parted from said stationary die plate by a predetermined distance corresponding to the thickness of said second layer.
Dependencies are inferred from the claim text.