Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Reexamination Certificate
2005-09-29
2008-03-25
Davis, Robert B. (Department: 1791)
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
C425S145000, C425S149000, C425S559000
Reexamination Certificate
active
07347965
ABSTRACT:
An apparatus for injection molding comprises an injection unit comprising a plunger, the plunger being translated with accumulation of plasticized material in preparation for injection and being advanced to inject the accumulated plasticized material into mold cavities. At least one electric motor is engaged with the plunger to resist translation as melt is accumulated and to inject plasticized material into the mold cavities. At least one hydraulic actuator selectably operates the plunger during a pack and hold interval to supply supplemental force when force supplied by the electric motors is limited to maintain the operation of the motors within the applicable continuous duty rating thereof. The electric motors are advantageously selectably operatively engaged with the plunger to inject plasticized material into the mold cavities and the hydraulic actuators are operated to inject plasticized material into the mold cavities when the motors are not engaged therefore.
REFERENCES:
patent: 5338174 (1994-08-01), Miese et al.
patent: 5645868 (1997-07-01), Reinhart
patent: 5747076 (1998-05-01), Jaroschchek et al.
patent: 5916602 (1999-06-01), Klaus
patent: 6200127 (2001-03-01), Klaus
patent: 6478572 (2002-11-01), Shad
patent: 2004/0065974 (2004-04-01), Dantlgraber
patent: 2004/0109917 (2004-06-01), Shad
patent: 2001001126 (2001-01-01), None
patent: WO2005051603 (2005-06-01), None
European Patent Office Search Report and Written Opinion mailed Jan. 24, 2007.
Chaet Marissa W.
Davis Robert B.
Gregg John W.
Uniloy Milacron USA Inc.
LandOfFree
Apparatus and method for injection molding does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Apparatus and method for injection molding, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Apparatus and method for injection molding will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3965005