Honda Motor Co., Ltd.

Hiroshi Matsushima

Tomoyuki Uchi

Takashi Abe

A rotary core includes an undercut portion molding section for molding an undercut portion in a resin-molded article, and a seal portion abutting on a mold main body. In a side view viewed from a direction orthogonal to the direction in which a shaft member serving as the rotation center of the rotary core extends, a first imaginary line extending along the inner edge of the seal portion, and a second imaginary line extending from the rotation center to the first imaginary line and orthogonal to the first imaginary line are drawn. The seal portion includes a portion that is located on a lower side of the second imaginary line and is bent inward in the width direction as compared with a portion of the seal portion that is located on an upper side of the second imaginary line.

Mold apparatus

This mold device has a rotary core that rotates about a shaft member as a rotation center by being provided with a rotational driving force directly from a rotation driving means. A restriction core is interposed between the rotary core and a mold body to restrict the rotation of the rotary core. That is, the rotary core becomes rotatable when the restriction core is withdrawn from between the rotary core and the mold body.

Mold device and method for manufacturing resin molded article

The mold apparatus () includes: the stationary mold () of the mold main body () that molds the main body part (); the rotary core () that molds the undercut part () and mold releases by rotationally moving in a direction separating from the undercut part (); and the restricting core () that restricts movement of the rotary core () sandwiching between the stationary mold () and rotary core () during molding, and releases restriction of the rotary core () by moving in a direction exiting from between the stationary mold () and rotary core () during mold release of the rotary core () from the undercut part ().

Growing community of inventors

Tochigi-ken, Japan

Hiroshi Matsushima