Nissei Plastic Industrial Co., Ltd.

Shuji Aiba

Kazutoshi Takayama

Kazuki Miyairi

Minoru Yamazaki

Makoto Nakazawa

Toshiyuki Kanai

A die assembly for molding a disc such as a compact disc, a video disc or the like by employing an injection molding process. The die assembly comprises a stationary die half including as essential components a stationary platen, a base die half, and an insert die half received on the stationary platen, and a movable die half. The insert die half includes a first insert for fixing the insert die half on the stationary platen, and a first mirror surface board removably received in a cavity of the first insert. The insert die half can be easily installed and removed into/from an installation space defined by a pair of retaining members and a die receiving member and when installed, it can be certainly and easily fixed by a pair of retaining members.

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Nagano, Japan

Shuji Aiba