Apparatus for injection molding

Details Apparatus for injection molding Apparatus for injection molding

2007-11-23

2010-12-14

Mackey, James (Department: 1744)

Plastic article or earthenware shaping or treating: apparatus

Female mold and charger to supply fluent stock under...

Plural mold cavities

C425S451700, C425S589000

Reexamination Certificate

active

07850443

ABSTRACT:
An apparatus for injection molding using a stack mold comprising first and second mold assemblies interposed between a movable platen and a stationary platen comprises at least one centering device for coupling movement of the movable platen to intermediate mold members of the mold assemblies, the centering device comprising first and second helical gear mechanisms and a transmission coupling rotation of helical gear segments of the first and second helical gear mechanisms. Effective pitch of the helical gear mechanisms and the ratio of rotation coupled by the transmission are chosen to maintain the intermediate mold members centered in or offset from center in the separation between the movable platen and stationary platen.

REFERENCES:
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patent: 6106265 (2000-08-01), Von Holt
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patent: 2005/0167038 (2005-08-01), Torris et al.
patent: 19610991 (1997-01-01), None
D-M-E Company, “Helical Gear Stack Mold Systems” (product brochure), Oct. 2006, USA.
International Search Report in PCT/US2008/004797 mailed by European Patent Office Aug. 4, 2008.
Written Opinion of the International Searching Authority in PCT/US2008/004797 mailed by European Patent Office Aug. 4, 2008.

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