Plastic article or earthenware shaping or treating: apparatus – With direct application of magnetic force to manipulate...
Reexamination Certificate
2006-08-15
2006-08-15
Davis, Robert (Department: 1722)
Plastic article or earthenware shaping or treating: apparatus
With direct application of magnetic force to manipulate...
C425S562000, C425S564000, C425S550000, C425S587000, C264S040500
Reexamination Certificate
active
07090477
ABSTRACT:
An electromagnetic coaxial driving injection apparatus, having a linear motor for driving injection and a rotation motor for metering. The linear motor and the rotation motor of both the injection and metering motors and an injection screw are set on a common axis. A connecting device connects moving parts of the motors with the injection screw. Stationary parts of the motors are fastened on a frame and forward-backward moving unit, not moving during injection and metering. Due to the arrangement of the moving parts and the injection screw on a single axis, moving parts are lessened, and transmission losses are minimized. Since the number of structural parts is low, only the moving parts of the motors move during injection while the stationary parts thereof remain at rest, thus greatly reducing inertia. Furthermore, since the moving axis of the injection screw and the injection screw are linked, without being connected with stators or other structural parts, injection is performed with minimal friction, enhancing effectiveness of the apparatus.The main characteristic of the present invention is that, due to direct driving of injection without mechanical transmission, the effects of hysteresis and backlash are avoided. Furthermore, inertia and friction are reduced. The present invention increases the response and reappearance of the system.
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Chen Ming-Chi
Chung Yong-Chen
Feng Wen-Hung
Hsu Chia-Chun
Lin Chia-Hung
Davis Robert
Industrial Technology Research Institute
Pro-Techtor Int'l Services
Rao G. Nagesh
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