Plastic and nonmetallic article shaping or treating: processes – With measuring – testing – or inspecting – Controlling heat transfer with molding material
Reexamination Certificate
2006-02-21
2006-02-21
Heitbrink, Jill L. (Department: 1732)
Plastic and nonmetallic article shaping or treating: processes
With measuring, testing, or inspecting
Controlling heat transfer with molding material
C264S327000, C264S328180, C425S552000
Reexamination Certificate
active
07001546
ABSTRACT:
A method and apparatus for thermostatically controlling mold temperatures. The molding apparatus includes at least two die sections and a thermostatic control valve. At least one of the die sections has a cooling channel extending through portions of the die section. The cooling channel has an inlet end connected to a source of cooling fluid and an outlet end connected to an exhaust line. The thermostatic control valve is interposed in the exhaust line and has closed and open conditions. In the closed condition, the flow rate of fluid through the cooling channel is restricted causing the temperature of the die section to increase. In the open condition, the flow rate of fluid through the cooling channel is increased causing the temperature of the die section to decrease. The thermostatic control valve automatically moves between the open and closed conditions responding to the temperature of fluid through the cooling channel.
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G H. Tool & Mold, Inc.
Heitbrink Jill L.
Polster Lieder Woodruff & Lucchesi L.C.
Smith Scott A.
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