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:
Jul. 28, 1992
Filed:
Mar. 13, 1991
Norio Manabe, Mie, JP;
Yasuhiko Onishi, Aichi, JP;
Sumitomo Wiring Systems Ltd., Mie, JP;
Abstract
The injection molding machine is designed to produce molded pieces in a predetermined shape by moving back and forth a screw inside a cylinder so as to inject a molten molding material in the cylinder into a metal mold. The evaluation of molding stability of this injection molding machine is carried out in the following steps. First, an injection pressure imparted to the molten molding material by the screw at each screw position is detected, every time a molded piece is produced, and the injection pressure so detected is then integrated so as to obtain the work done of the injection molding machine. Following this, a molded piece so produced is weighed. Thus, a correlation between work done and the weights of molded pieces is statistically obtained on the basis of a plurality of corresponding data in relation to work done and the weights of molded pieces so obtained. Molding stability is then evaluated from the correlation so obtained.