Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Positioning of a mold part to form a cavity or controlling...
Patent
1994-04-19
1995-12-26
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...
264 407, 2642976, 425138, 425150, 425154, 425345, B29C 4358, B29C 4304
Patent
active
054785120
ABSTRACT:
A monitoring system provides a method of operating a compression plastic molding apparatus which entails substantially continuously monitoring the position of an upper compression cam of the apparatus, against which a rotatably movable mold assembly reacts during operation of the apparatus. By monitoring the position of the compression cam, the system is able to detect excessive loading of the apparatus, such as attendant to depositing of excessive plastic material in the mold assembly. A force determining device, illustrated in the form of a fluid pressure (pneumatic) cylinder, is operatively connected with the compression cam, with the system operating to release pressure in the cylinder in the event that the compression cam is moved in a manner which indicates excessive loading of the plastic mold assembly.
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patent: 4640673 (1987-02-01), Takeda et al.
patent: 4776782 (1988-10-01), Murayama et al.
patent: 4938370 (1990-07-01), McBride
patent: 5211964 (1993-05-01), Prytherch et al.
Lewellen, deceased Steven
Miller Peter S.
H-C Industries Inc.
Heitbrink Jill L.
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