Metal founding – Means to shape metallic material – Pressure shaping means
Reexamination Certificate
2003-03-06
2008-07-22
Lin, Kuang (Department: 1793)
Metal founding
Means to shape metallic material
Pressure shaping means
C164S113000, C425S549000
Reexamination Certificate
active
07401639
ABSTRACT:
A sprue apparatus for use in a molding apparatus for connecting the melt duct of a molding machine nozzle with a runner system of a molding apparatus. The sprue apparatus includes a plurality of thermal regulators that regulate a plurality of thermal zones that segment the length of the sprue apparatus for the purpose of localized temperature control in support of a molding process. The plurality of zones may be thermally regulated such as to enable a substantially leak-free junction between the machine nozzle and the molding apparatus. The sprue apparatus may include an isolating coupler that substantially isolates a heated sprue bushing from carriage force. The invention has been found particularly useful when injecting metal alloys such as magnesium based alloys when in the thixotropic state.
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Herbert Rees, Understanding Injection Molding Technology, Carl Hanser Verlag, 1994, p. 61.
Husky Injection Molding Systems Limited
Katten Muchin & Rosenman LLP
Lin Kuang
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