Drive apparatus for injection molding machine, injection...

Details Drive apparatus for injection molding machine, injection... Drive apparatus for injection molding machine, injection...

2004-03-04

2008-10-28

Mackey, James (Department: 1791)

Plastic article or earthenware shaping or treating: apparatus

Control means responsive to or actuated by means sensing or...

Mold motion or position control

C425S574000, C425S587000

Reexamination Certificate

active

07442022

ABSTRACT:
An object is to provide a drive apparatus for an injection molding machine which can generate a large thrust force and can provide short-cycled continuous drive. The drive apparatus includes a housing (11); a tubular linear motor (14) including a movable element (12) disposed within the housing (11) in a manner capable of advancing and retreating, and a stationary element (13) attached to the housing (11), the linear motor (14) serving as a first drive section; a member-to-be-driven (15) caused to advance and retreat together with the movable element (12); and a second drive section attached to the housing (11) and disposed such that at least a portion of the second drive section overlaps the linear motor (14) along the axial direction. By merely a slight increase in a radial dimension, the area of a permanent magnet (23) of the movable element (12) can be sufficiently increased, and the capacity of the linear motor (14) can be increased.

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Johannaber F. et al., “Handbuch Spritzgiessen, Passage” XP 002300506, 2001, pp. 928-931.
Partial European Search Report for European application No. EP 04 71 7238.

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