The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 16, 2004
Filed:
Jan. 03, 2002
Yasuyuki Suzuki, Tokyo, JP;
Suzuki Kanshi Co., Ltd., Tokyo, JP;
Abstract
An extrusion molding apparatus includes a molding die ( ) through which a plasticized and kneaded raw material ( ), composed of a synthetic resin material having high heat-resistance and strength, is extruded to form a tubular body ( ). The tubular body ( ) is passed on a sizing die ( ) to cool and harden the tubular body ( ) and give it a final inner diameter. The molding die ( ) and sizing die ( ) are coupled to each other by a connecting pipe ( ). The sizing die ( ) is made of a carbon material. The connecting pipe ( ) supplies a first air ( ) to an interior of the sizing die ( ). An air lubrication layer is formed between an inner surface ( ) of the continuous product ( ) and an outer surface ( ) of the sizing die ( ) by a second air ( ) supplied to an interior of the molding die ( ).