Dual feed bushing for multi-cavity injection molding

Details Dual feed bushing for multi-cavity injection molding Dual feed bushing for multi-cavity injection molding

B - Operations, Transporting

29

C

18/703

B29C 45/28 (2006.01)

Patent

CA 1252970

ABSTRACT OF THE DISCLOSURE This invention relates to an improved valve pin bushing for a multi-cavity injection molding system. The valve pin bushing has a central bore through which the valve pin extends. The melt duct extends through the bushing to join an enlarged portion of the central bore around the valve pin. In the bushing according to the invention, the melt duct branches into two arms with smoothly curved bends which lead to opposite sides of the valve pin. This avoids the problem of streaking and slow melt flow on the opposite side of the valve pin.

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