Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Measuring a weight or volume
Patent
1991-03-13
1992-07-28
Heitbrink, Tim
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Measuring a weight or volume
264 407, 425140, 425145, 425149, B29C 4577
Patent
active
051339102
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.
REFERENCES:
patent: 4146601 (1979-03-01), Bishop
patent: 4311446 (1982-01-01), Hold et al.
patent: 4411609 (1983-10-01), Yoshii et al.
patent: 4755122 (1988-07-01), Schmidt
patent: 4833910 (1989-05-01), Kenmochi
Manabe Norio
Onishi Yasuhiko
Heitbrink Tim
Sumitomo Wiring Systems Ltd.
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