Toshiba Kikai Kabushiki Kaisha

Takehiro Yamamoto

Akinori Ide

Koji Mizunuma

Takayoshi Sano

Satoru Nitta

Tadamasa Furuya

Takashi Hirose

Tomonori Yamaguchi

Tomokazu Abe

A sheet or film-forming rollincludes an inner cylinder memberhaving axial partsprovided on both sides thereof and rotatably supported by bearing partsthrough the axial parts, a rubber rollfitted to an outer circumferential surface of the inner cylinder member, eccentric side platesrotatably fitted to the axial partsof the inner cylinder memberrespectively, and an elastic outer cylinder memberrotatably supported by the eccentric side plates. The elastic outer cylinder member, which is provided with a thin-walled structure and made from metal, has an inner diameter larger than an outer diameter of the rubber rollto accommodate the rubber rollin an interiorthereof, and has inner circumferential surfaceA coming into contact with an outer circumferential surfaceA of the rubber roll

Sheet or film-forming roll

An sheet forming apparatus selectively uses two control modes: a constant roller gap control mode where a roller gap is controlled by a roller gap adjustment means so that the roller gap converges a predetermined control target value; and a constant pressing load control mode where the roller gap is controlled by the roller adjustment means so that a pressing load converges a predetermined control target value.

Sheet forming apparatus and roller gap control method

Molten polymers are forced into T dies combined to form a multiple T die, the molten polymers are extruded through the T dies in monolayer. The monolayers extruded through the T dies are superposed and laminated outside the multiple T die while the polymers are in a molten or semi-molten state to form a intermediate molten multilayer. The multiple T die is advanced into a space between an open top half mold and a bottom half mold of a compression mold to deliver the intermediate multilayer onto the bottom half mold. The intermediate multilayer is cut to a predetermined length on the bottom half mold, and is processed for compression molding in the compression mold to form a multilayer article. A molding cycle for molding the multilayer article is carried out automatically at a remarkably improved manufacturing efficiency.

Method of manufacturing a molded multilayer article

Molten polymers are forced into T dies combined to form a multiple T die, the molten polymers are extruded through the T dies as monolayers. The monolayers extruded through the T dies are superposed and laminated outside the multiple T die while the polymers are in a molten or semi-molten state to form a intermediate molten multilayer. The multiple T die is advanced into a space between an open top half mold and a bottom half mold of a compression mold to deliver the intermediate multilayer onto the bottom half mold. The intermediate multilayer is cut to a predetermined length on the bottom half mold, and is processed for compression molding in the compression mold to form a multilayer article. A molding cycle for molding the multilayer article is carried out automatically at a remarkably improved manufacturing efficiency.

Growing community of inventors

Shizuoka, Japan

Takehiro Yamamoto