Toshiba Kikai Kabushiki Kaisha

Masao Hirosawa

Takeo Oshiro

Hiroshi Kanno

Jun Fujita

Hideo Tanaka

Shinichi Tazawa

Yoshinori Nakanishi

Nobukatsu Omura

Harukatsu Goto

Takashi Goto

Hideo Ichikawa

Naoki Yamamoto

Yasuyuki Ono

Hidekazu Nakamura

A mold clamping unit comprises guide rollers for guiding fitting and releasing of a mold, a hydraulic clamp for holding the mold at a molding position, a guiding portion formed to project in a direction perpendicular to a mold open-close direction from a lower portion of platen and a locking mechanism provided to an upper portion opposing to the guiding portion for the platen, for locking the mold at a releasing position. Since exchange and maintenance operations of a stamper can be carried out under a condition where the mold is released to the releasing position over the guiding portion and locked by the locking mechanism, fitting/releasing of the mold to/from the platen can be facilitated and exchange and maintenance operations of the stamper can be made easy.

Mold clamping unit and method of positioning mold in mold clamping unit

A combination of displacement mechanisms adaptive for positioning a stationary platen to a frame, permitting the stationary platen to be displaced toward an injection unit to allow an escaping extension of tie-rods in a mold clamp action, is operative to displace the same toward the injection unit for a maintenance service, so that it can be displaced toward the injection unit further from a molding position in a molding operation.

Injection molding machine

A stationary platen for holding a stationary part of a mold centered to an injection axis is securely connected by tie-rods to a cylinder body integral with a cylinder part of a clamp cylinder which moves a movable part of the mold in a clamp direction, and subjected to a deformation when the mold is clamped, which deformation is made symmetrical with respect to a reference plane including the injection axis by a combination of mechanisms therefor.

Clamping apparatus for precise injection molding

Injection molding method and apparatus with magnetic mold clamping

Growing community of inventors

Shizuoka-ken, Japan

Masao Hirosawa