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. 11, 1997
Filed:
Apr. 17, 1995
Tsuyoshi Arai, Nagano, JP;
Nissei Plastic Industrial Co., Ltd., Nagano-ken, JP;
Abstract
A clamping method of an injection and compression molding machine, includes the steps of moving a movable mold 2 up to a pre-clamping position Sf located before a final clamping position Se, starting injection and filling of resin at the pre-clamping position Sf, and moving the movable mold 2 up to the final clamping position Se through high-pressure clamping; wherein the movable mold 2 is moved from a mold opening position So to the final clamping position Se and thereafter high-pressure empty clamping without injection and filling of resin is performed and a position to which the movable mold 2 is moved backward by a set value Xs from the position where the high-pressure empty clamping is performed is set as the pre-clamping position Sf, before moving the movable mold 2 from the mold opening position So to the pre-clamping position Sf. Thereby, an accurate movable-mold pre-clamping position is set and the weight of a molded part, the amount of gas to be released, and the transfer property are stabilized.