Appeal No. 2004-1495 Page 4
Application No. 09/526,631
toward the fixed side mold 2A and the temperature controller 14 is actuated to heat the
cooling medium in a reservoir and actuate a pump to circulate cooling medium through
the cooling channels within the molds. The temperature controller 14 maintains the
cooling medium in the reservoir at a predetermined constant temperature (column 7,
lines 67-68). When the fixed side mold stops moving, high frequency oscillations are
transmitted to the heating coil 18B to heat the molds 2A, 2B. When the temperatures
detected by the temperature sensors reach or exceed the peak temperature, the
oscillation to the heating coil 18B is stopped, the heating means 18 is retracted, the
mold is closed, the molding operation is completed and the molded article is removed.
As disclosed in column 9, lines 3-30, the mold components 2A, 2B are fabricated
by laminating an electroformed copper layer, and thereafter
laminating a chromium plating layer or a titanium compound
layer on the worked face.
More specifically, by use of an iron type metal
material as the substrate for mold, heating can be done
efficiently by high frequency heating, and the copper layer
which is formed by electroforming is substantially free from
effect such as pinhold, etc. and excellent in cutting
workability, whereby high degree of mirror finishing is
rendered possible. Further, by providing a nickel layer
between the substrate of an iron type metal material and the
copper layer according to the electroforming method,
adhesive force between the iron type metal an [sic: and] the
copper layer is enhanced to completely prevent peeling, etc.
during mechanical working, hot impact.
Also, since the copper layer is susceptible to flaws
caused by deforming on account of low surface hardness
and elasticity, by lamination of a chromium plating layer or a
titanium compound layer such as of titanium nitride, etc., it
becomes possible to obtain a mold surface strongly resistant
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Last modified: November 3, 2007