Flash free pipette tip mold

Details Flash free pipette tip mold Flash free pipette tip mold

B - Operations, Transporting

29

C

18/708

B29C 45/34 (2006.01) B01L 3/02 (2006.01) B29C 45/00 (2006.01) B29C 45/26 (2006.01)

Patent

CA 1250719

-0- FLASH FREE PIPETTE TIP MOLD ABSTRACT An apparatus and method for molding plastic pipettes are disclosed, using an upper and lower mold plate that define a cavity which forms the outer sur- face of the pipette. The mold parting line of the upper and lower mold plates is located at a position between the ends of the cavity to prevent "radial" flash at the aperture of the pipette. "Axial" flash at the aperture of the pipette is prevented by a lower core pin in the lower mold plate. The lower core pin extends into the cavity and defines the dimensions of the aperture of the pipette. The extension of the lower core pin from the lower mold plate minimizes tool wear at the aperture and makes the alignment of the upper and lower mold plates at the orifice less critical.

507038

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