Magnetic plastic rotor disk manufacturing apparatus

Details Magnetic plastic rotor disk manufacturing apparatus Magnetic plastic rotor disk manufacturing apparatus

1994-02-24

1995-06-27

Heitbrink, Tim

Plastic article or earthenware shaping or treating: apparatus

With direct application of magnetic force to manipulate...

425174, 425563, 425572, 425573, B29C 4532

Patent

active

054275148

ABSTRACT:
A magnetic plastic rotor disk manufacturing apparatus, includes an injection device for injecting a magnetic plastic material containing a synthetic resin matrix and a magnetic powder; a mold for molding the magnetic plastic material injected thereinto from the injection device, and a device for generating a magnetic field and magnetizing the magnetic powder in a direction along a diameter of the magnetic plastic rotor disks. The mold includes a three-plate type mold constructed of two retainer plates and a single runner stripper plate. One of the retainer plates is formed with a plurality of pin gates corresponding to the cavities so as to supply the magnetic plastic material through the pin gates into the cavities.

REFERENCES:
patent: 4441875 (1984-04-01), Saito et al.
patent: 4643665 (1987-02-01), Zeiger
patent: 4752199 (1988-06-01), Arai
Injection Molding Handbook, pp. 183-186, 1986.

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