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Author Sachs, Emanuel. Wylonis, Edward. Allen, Samuel.
Source Polymer Engineering & Science. v. 40 no5, May 2000, p. 1232-47.
Abstract The authors examined the benefits of injection molding tooling with cooling channels conformal to the molding cavity. The tooling was fabricated using a solid freeform fabrication process called 3-D printing. Using thermocouples buried in the core and in the cavity, it was found that the conformal tool had no period of transient behavior at the start of molding, whereas a tool with straight channels took up to 15 cycles to reach an equilibrium temperature about 40[degree]C above the coolant temperature. Moreover, the conformal tool maintained a more uniform temperature within the tool during an individual molding cycle. The temperature histories of the mold could be accurately described using a 2-D finite difference model. XX