Plastic and nonmetallic article shaping or treating: processes – Mechanical shaping or molding to form or reform shaped article – Shaping against forming surface
Reexamination Certificate
1998-12-07
2001-01-30
Heitbrink, Jill L. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
Mechanical shaping or molding to form or reform shaped article
Shaping against forming surface
C264S334000, C249S064000, C425SDIG005
Reexamination Certificate
active
06180047
ABSTRACT:
BACKGROUND OF THE INVENTION
Aluminum molds for making wax patterns have been in use for years. Combination aluminum and epoxy molds have also been used. Epoxy mold parts have the drawback of wearing after repeated use and of being easily damaged during the handling required to carry out repeated molding operations. Additionally, it is well known that aluminum molds have superior heat transfer relative to epoxy molds, thereby reducing dwell time for wax pattern production and overall cycle time.
Where molded parts have included an intricate interior cavity, a plurality of mold sections and cores have been required. The mold parts and cores require handling to accomplish assembly and disassembly. Further, in the molding of demanding shapes such as golf club heads parting lines have presented problems requiring trimming and reworking wax patterns. Prior wax patterns for making golf club heads are disclosed in U.S. Pat. Nos. 5,204,046 and 5,417,559.
SUMMARY OF THE INVENTION
In summary, the present invention comprises a multi-section mold including an inner cluster core which novel mold is shaped and proportioned to facilitate handling during molding operation. Mold manipulation by hand is limited to sliding and translating of mold sections and the removal and replacement of the cluster core.
Preferably, the mold is connected to and operated with a mold press which includes a work station and a preparation station into which a lower mold portion is slidably mounted with inner cluster core in place and the upper mold section is lowered against the lower section. After injection of wax and cooling, the upper section is raised, the lower section is slidably moved out of the work station to the preparation station and a third mold portion is translated in its open position. Finally, the cluster core is removed.
As a feature, it is contemplated that, as the lower section is moved out of the work station, the core along with the wax pattern may be automatically raised to facilitate pattern and core removal. The mold is made of aluminum.
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Latulippe, Jr. Paul N.
Yost Thomas E.
Heitbrink Jill L.
Pennie & Edmonds LLP
Sturm Ruger & Company, Inc.
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