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. 18, 2003
Filed:
Oct. 13, 1999
Atsushi Koide, Nagano, JP;
Jun Nakazawa, Nagano, JP;
Nissei Plastic Industrial Co. Ltd., Nagano-Ken, JP;
Abstract
A plasticizing apparatus used for a pre-plasticization-type injection molding machine is equipped with a screw drive section which comprises a rotational drive section supported in an axially moveable manner and adapted to rotate the screw; and an advancement/retraction drive section including a servomotor and a ball-screw mechanism for converting rotational motion of the servomotor to linear motion in order to axially move the rotational drive section. By virtue of the above-described structure, the screw disposed within the barrel is rotated by the rotational drive section of the screw drive section, so that the molding material within the barrel is plasticized (melted) and is then supplied to the injection apparatus. Further, the rotational drive section (screw) is advanced and retracted by the advancement/retraction section of the screw drive section, so that the resin passage of the barrel is opened and closed in accordance with the position of the screw.