Toyoda Gosei Co., Ltd.

Takao Nakajima

Hisao Hanabusa

Katsunori Kawai

Masanori Aritake

Haruhisa Kawase

Masahiro Takaya

Harumi Kogiso

Tatsuhiko Nagata

Atsushi Sumida

Kiyoshi Shigeki

Hidetaka Fukamachi

Kunio Maeno

Takahiko Kasuya

Tsuneo Ohno

A weather strip comprising an extruded body having straight sections and a corner section curving therebetween is disclosed. The extruded body comprises an attachment portion and a hollow sealing portion integrally formed by extrusion molding. The attachment portion is attached to a part of an automobile and the sealing portion is connected to the attachment portion at both ends. The weather strip comprises: an incision slit made on the outer periphery of the sealing portion in the corner section; an incision edge formed on the sealing portion along the incision slit, the incision edge being spread out toward the outer periphery of the corner section with the attachment portion and sealing portion being curved along a corner shape of the part of the automobile; and a molded part formed at least in the vicinity of the incision edge on the back side of the sealing portion in the corner section.

Weather strip

A door weather strip, which is of annular form as a whole, includes a base section and a hollow sealing section as its basic constituent elements. The portion of the door weather strip corresponding to the corner part of the upper portion on the center pillar side of the front door provides a molded section, and any other section provides a continuously formed extrusion section. On the portion other than the lower side portion in the peripheral portion of the opening section for the front door of a vehicle body, the ridge portion as along the peripheral portion thereof is provided. In the closed state of the front door, the sealing section is elastically deformed so as to be pressed and extended in opposite directions away from the top portion of the ridge portion.

Sealing structure of opening section in vehicle

A vehicle has a movable member movably disposed in an opening to close or open the opening. The seal is mounted to one of the movable member and an inner edge surrounding the opening conforming to each other. The seal has a seal portion subject to elastic deformation when being pressed against the movable member or the inner edge. The seal portion is made of a vulcanizable rubber. A base portion is made of a thermoplastic elastomer. The seal portion and the base portion are integrated by coextrusion. The rubber of the seal portion is vulcanized when passing through a vulcanizer.

Seals for vehicles

A method for manufacturing a front door weather strip includes continuously forming one extrusion molding section by extrusion molding corresponding to a region from an upper section of the front door to the rear side section of the front door and forming a mold molding section corresponding to a corner of a rear side upper section of the front door used a mold so as to connect both ends of the extrusion molding section, thereby manufacturing the front door weather strip.

Front door weather strip and manufacturing method therefor

A front door weather strip is annular as a whole, and has one mold molding section fixed to the corner section which is the rear side upper section of a door frame, and one extrusion molding section. The extrusion molding section includes a base section and a hollow sealing section. A seal lip is integral with the part of the extrusion molding section which corresponds to the upper section of the door frame. The length of the seal lip is gradually changed at a front upper corner part. During extrusion molding, the part of the extrusion molding section which corresponds to a front lower corner part is formed as follows: That is, the sealing section is larger in height than the other part. At least the part of the extrusion molding section which corresponds to the lower section is smaller in wall thickness of the vehicle outside base end part of the sealing section than the part which corresponds to the upper section.

A method of forming a molded seal portion onto a corner part of a weather strip without generating any molding defect due to variations in the injection amount, injection pressure or the like of the molding material. A seal portion projecting from one side wall of a trim portion is partly cut off, the remaining trim portion is bent to a corner configuration and placed in a mold, and a molding material for the seal portion is injected into a cavity of the mold from the position corresponding to a longitudinally extending base end edge of the molded seal portion such that the molding material flows from the side of the longitudinally extending base end edge of the molded seal portion towards a distal end edge thereof to fill the cavity.

Method of forming a corner part of a weather strip

A weather strip for a vehicle has a channel-shaped base portion having a U-shaped cross section and provided with retaining lips for retaining a flange of a vehicle body, a seal portion integrally projecting from an outer surface of the base portion, and a core member made of synthetic resin and having a U-shaped cross section, which is embedded in the channel-shaped base portion. The method for producing such a weather strip as described above includes the steps of extruding a strip-shaped thermoplastic synthetic resin sheet having stress concentrating portions which are broken when bending stress is applied thereto, with rubber material to obtain an extruded body, heating the obtained extruded body for curing the rubber material thereof, applying bending stress to the cured extruded body for separating the core member in the stress concentrating portion and bending the separated core member with the rubber material to have a U-shaped cross section.

Weather strip for vehicle and producing method thereof

A metal carrier is embedded into trim, for providing proper rigidness in the transverse direction as well as in the longitudinal direction to the strip-like trim formed with rubber or plastics and the like. Transverse slots are formed in the strip-like sheet metal at given intervals in the longitudinal direction and a thin link portion and/or narrow width portion (sectional area in the transverse direction is small) is alternately formed at the top and bottom portions of the transverse slot. When an external force is applied to the metal carrier covered with rubber or plastics, the formed connecting links of the thin link portion and/or narrow width portion at top and bottom are broken, and the metal carrier becomes a continuous zigzag strip.

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Inazawa, Japan

Takao Nakajima