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US 5,476,626 AGranted
Method for forming a weatherstrip
AssigneeKinugawa Rubber Ind. Co., Ltd.
InventorsMasayoshi Miyama, Hiroshi Togami
Life of this patent
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Abstract
A method for forming a weatherstrip includes extruding a compound formed of 1-10 weight of polyglycidyl methacrylate having an epoxy group in the molecular structure thereof added per 100 parts of a rubber compound formed of SBR/EPDM. As the compound is extruded from the extruder, a urethane coating material is supplied to a nozzle to accomplish coating of an article concurrently with forming thereof. The extruded article is then vulcanized to assure good sealability.
Claims14
A method of forming a weatherstrip, comprising the steps of:
- adding polyglycidyl methacrylate having an epoxy group to a rubber compound wherein the polyglycidyl methacrylate is provided by weight at 1 to 10 parts per 100 parts of the rubber compound, said rubber compound being comprised of a mixture of styrene butadiene rubber (SBR), and ethylenepropylene diene copolymer (EPDM), mixed in a ratio from 80:20 to 30:70;
- supplying said rubber compound to a first nozzle;
- supplying a urethane coating material to a second nozzle communicating with an outlet portion of said first nozzle;
- extruding said rubber compound through said first and second nozzles;
- supplying said urethane coating material to a surface portion of said rubber compound via said second nozzle during said extrusion of said rubber compound;
- and
- vulcanizing said rubber compound with said urethane coating material.
4 more elements
Dependencies are inferred from the claim text.