Control method of an injection molding machine

Details Control method of an injection molding machine Control method of an injection molding machine

1997-07-30

1999-01-26

Heitbrink, Jill L.

Plastic and nonmetallic article shaping or treating: processes

With measuring, testing, or inspecting

Positioning of a mold part to form a cavity or controlling...

2643281, 425150, 425590, B29C 4580

Patent

active

058634754

ABSTRACT:
A control method for an injection molding machine includes deciding a position where the speed of a movable platen is to be changed from high speed to low speed. Over the coasting distance, between high speed (equivalent to V.sub.4) and low speed (equivalent to V.sub.6), the speed changes smoothly past the decided position in accordance with a function of time, F(T)=V.sub.4 -(V.sub.4 -V.sub.6) (1-e.sup.-T). Decreasing speed at a second decided position, just before the movable platen stops, is in accordance with a function of position s, F(s)=s(V.sub.MAX -V.sub.MIN)/D+V.sub.MIN. V.sub.MAX is equivalent to the maximum mold closing or opening speed and V.sub.MIN is equivalent to the minimum speed at which moving of the movable platen is guaranteed.

REFERENCES:
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patent: 4781872 (1988-11-01), Inaba
patent: 4802834 (1989-02-01), Neko
patent: 5238383 (1993-08-01), Bannai
patent: 5493503 (1996-02-01), Richards et al.
patent: 5514311 (1996-05-01), Shimizu et al.
patent: 5529478 (1996-06-01), Siegrist et al.

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