The velocity of the molten metal at the metal-polymer pattern front (interface) is in the range of..

The velocity
of the molten metal at the metal-polymer pattern front (interface) is in the
range of 0.1 to 1.0 mfs and can be controlled by producing patterns with
cavities or hollow sections. Thus, the velocity will increase as the molten
metal crosses these hollow regions, similar to pouring the metal into an empty
cavity.

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