Compression apparatus for molding, injection compression molding machine, and injection compression molding method using the compression device

摘要

A compression apparatus for molding which applies uniform compression force to molten resin, and facilitates downsizing of the overall compression apparatus and attachment of the compression apparatus to a molding machine. Also, an injection compression molding machine and an injection compression molding method which use the compression apparatus for molding are disclosed. The compression apparatus is disposed in the rear of the movable mold of a die of a molding machine in which the movable mold is advanced toward the stationary mold of the die in order to apply compression force to the charged molten resin, to thereby mold the molten resin. The compression apparatus has a function of generating a pressing force for pushing the movable mold toward the stationary mold. The compression apparatus includes first and second slant members and having respective slant faces and in surface contact with each other. The slant members are advanced toward the slant members in order to generate pressing fore. A plurality of slant members moving in the same direction are engaged with each other via a single interlock plate. This configuration enables synchronized movements of all the slant members. In addition, since the weight and size of the synchronization mechanism are decreased, attachment to the molding machine is facilitated. Further, slant portions moving in different directions are provided. Slant portions moving in the same direction are engaged with each other via the interlock plate, and slant portions moving in different directions are engaged with each other via a link. The employment of the above-described structure enables the object of the present invention to achieve more effectively.