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:
Dec. 02, 2014
Filed:
Oct. 25, 2010
Toshihiko Kariya, Nagoya, JP;
Naoki Toda, Nagoya, JP;
Munehiro Nobuta, Nagoya, JP;
Mitsubishi Heavy Industries Plastic Technology, Nagoya-shi, JP;
Abstract
A plasticizing screw for injection molding according to the present invention is installed in an injection molding machine that performs injection molding by plasticizing thermoplastic resin feedstock containing reinforcement fibers, and includes a shaft, a main flight, and a sub-flight. The protrusion height of the main flight from the circumferential surface of the shaft is formed to be constant in at least an area in which the sub-flight is provided. The sub-flight includes a flat surface portion which is provided on the rear end side in a winding direction and in which a protrusion height from the circumferential surface of the shaft is lower than that of the main flight and is constant, and an inclined surface portion which is provided to extend continuously from a leading end in the winding direction of the flat surface portion and in which a protrusion height from the circumferential surface of the shaft gradually increases toward the leading end side in the winding direction and is less than the protrusion height of the main flight.