Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting
Patent
1996-03-22
1999-02-16
Heitbrink, Jill L.
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
2643281, 36447505, 364578, 425145, B29C 4577
Patent
active
058716769
ABSTRACT:
A method for setting up a program profile in the control of the injection speed of injection molding machines where a model shape of an article to be molded is divided into fine elements; the filling up state of melt resin for each fine element is obtained as a time period by using numerical analyzing methods including the finite element method, the boundary element method, the calculus of finite differences method and the FAN method under a condition that the moving speed of the injection plunger is constant; a time period required for filling the model shape of the article as a whole with melt resin is divided into a plurality of material filling up time periods by an arbitrary number; a mean discharge speed Cv1 to Cvn of melt material at every divided period is calculated; and a moving speed of the injection plunger Pv1 to Pvn at every divided period is set up as a function of the mean discharge speed Cv2 to Cvn.
REFERENCES:
patent: 4135873 (1979-01-01), Sone et al.
patent: 5008052 (1991-04-01), Harada
patent: 5031127 (1991-07-01), Fujita et al.
patent: 5296179 (1994-03-01), Kamiguchi et al.
Fujita Shigeru
Harada Susumu
Heitbrink Jill L.
Toshiba Machine Co. Ltd.
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