Ono Sangyo Co., Ltd.

Mitsui Chemicals, Inc.

Akihiko Imagawa

Masahiko Yamaki

Fumio Takahashi

Yosihisa Satoh

Masataka Takamura

Masayuki Nunome

Kazumi Shinto

Naoyoshi Kimura

Mitsuharu Mikawa

There is provided an arrangement of a mold including a mold base (), a cavity block () provided within the mold base (), a heat insulating layer () provided between the mold base () and the cavity block (), and a system of a flow passage (A) through which a heating medium and a cooling medium are alternately and repeatedly supplied, wherein a space is provided at a contact portion between the cavity block () and the mold base () based on anticipation of a thermal expansion of the cavity block (). Further, the cavity block () may be arranged to have inlet and outlet slots communicating with the channel (A), and the inlet and outlet slots may be attached with conduits thermally insulated from the mold base ().

Synthetic resin molding mold, apparatus for and method of adjusting a temperature of the mold

In a mold device for injection molding of synthetic resin having a cavity surface alternately heated and cooled and a bottoming structure for producing a product having a bored portion like a window, a bottoming portion for the production of a product having a bored portion is provided on a parting surface of the mold and a vacant space is provided in the bottoming portion. Thus, the contact area of the bottoming portion is reduced and a contact pressure of the bottoming portion and thermal strain due to a temperature difference between the cavity side mold and core side mold are reduced, so that it is possible to prevent occurrence of crack in a portion located immediately outside the window of the product. In a mold device for injection molding of synthetic resin having a cavity surface alternately heated and cooled and a slide structure, a mold base and a slide cavity block arranged in the slide core provided in the mold base are separately thermally controlled so that it is possible to prevent galling between the mold base and the slide core of the slide structure.

Mold device for injection molding of synthetic resin

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Aichi, Japan

Akihiko Imagawa