Tokai Kogyo Company Limited

Tokai Kogyo Kabushiki Kaisha

Keiji Hiroe

Kotaro Oka

Akito Ueda

Yasuyuki Takeuchi

Hideki Iwamoto

Yasuhiro Fukushima

A sealing member includes an attachment portion and a sealing portion in a cross-section, the attachment portion being attached to a flange portion provided to an opening edge of a vehicle body opening portion, and the sealing portion being integrated with the attachment portion. The sealing member is formed to be elongated and includes a first portion, a second portion, and a third portion in a longitudinal direction thereof, the first portion having a first cross-sectional shape, the second portion having a second cross-sectional shape, and the third portion continuously and integrally connecting the first portion and the second portion to each other. The cross-sectional shape of the sealing portion having the second cross-sectional shape is smaller than the cross-sectional shape of the sealing portion having the first cross-sectional shape, and the third portion is formed such that a cross-sectional shape thereof changes along the longitudinal direction.

Sealing member and attachment structure thereof

An extrusion die includes a die and a core, and the core includes a movable core portion that is movable along an extrusion direction and a fixed core portion. The movable core portion has non-similar cross-sectional shapes at front and rear two positions along the extrusion direction. A first portion of the elongated weather strip is molded in a state where the movable core portion is disposed at an advance position, and a second portion of the elongated weather strip is molded in a state where the movable core portion is disposed at a retreat position. During the molding of the second portion, a supply amount per unit time of a material for the sealing portion to a molding space for the hollow sealing portion that is secured between the core and the die is set to be larger than that during the molding of the first portion.

Weather strip and method for manufacturing same

The weather strip configured to be attached to the automobile body opening portion is an elongated member having a length configured to correspond to a side portion and a corner portion of the automobile body opening portion and includes a hollow sealing portion. A surface of the sealing portion corresponding to a floor-side side portion and a surface of the sealing portion corresponding to a floor-side corner portion are continuous to each other. A wall thickness of the sealing portion corresponding to the floor-side side portion is set to be smaller than a wall thickness of the sealing portion corresponding to the floor-side corner portion. The sealing portion corresponding to the floor-side side portion includes a portion having a smallest wall thickness among the entire sealing portion.

Weather strip for automobile

A method of manufacturing an elongated core which is buried in an elongated trim. The method includes, forming slits to a metal plate, which extend in a second direction, at predetermined intervals in a first direction so as to form core pieces between the adjacent slits; and rolling a portion of the metal plate in which the slits are not formed in the second direction to form a rolled portion extending in the first direction, and expanding the slits in the first direction to form spaces, thereby preparing a primary core in which the core pieces and the spaces are alternately provided in the first direction. Additionally, the method includes, supplying the primary core to between a pair of deformed portion forming rollers engaged with each other such that reinforcing defaulted portions extending in the second direction are repetitively formed in the first direction.

Method of manufacturing core, method of manufacturing trim, and core manufactured by the same

A molded product includes a matrix formed of a polymer material and a plurality of capsules dispersed in the matrix. An unevenness is formed on a surface due to expansion of the capsules. Some of the capsules have expanded without bursting and include an exposed outer shell portion that protrudes from a surface, and/or some of the capsules have burst and include an outer shell protruding portion that protrudes outward from the surface. Finish processing is performed, which eliminates the outer shell protruding portions and/or the exposed outer shell portions from the surface. This results in a molded product in which a color difference due to frequency of contacting an object, etc. is not easily generated.

Molded product and method of manufacturing the same

A long ornament member Whas an attaching portionand an ornamental portionconstituted by vulcanized rubber integrally formed on a surface of the attaching portion. The ornamental portionhas a surface roughened by plural microcapsules thermally expanded therein, plural concave portionsoutwardly opened in the microcapsulesthat burst on or in the vicinity of the ornamental portion, and plural projection portionsconstituted by outwardly swelling the microcapsulesexpanded in the vicinity of the surface. At least one of plural convex ridges and plural concave grooves are formed on the surface of the ornamental portion, the convex ridges extending along at least one of a longitudinal direction and a lateral direction that crosses the longitudinal direction, the concave grooves extending along at least one of the longitudinal direction and the lateral direction.

Growing community of inventors

Obu, Japan

Keiji Hiroe