Method for manufacturing a bowling pin
Number of patents in Portfolio can not be more than 2000
United States of America Patent
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Sep 14, 2004
Grant Date -
Jun 12, 2003
app pub date -
Oct 29, 2002
filing date -
Nov 10, 2000
priority date (Note) -
Expired
status (Latency Note)
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Abstract
A plastic bowling pin and method for manufacturing the bowling pin uses a first mold 8 having first axial rods 9 and 10 displaceable into and from the first molding cavity along a longitudinal axis 'a' and a second mold 15 having second axial rods 16 and 17 displaceable into and from the second molding cavity along a longitudinal axis 'b'. Molding a core portion 2 by forcing the molten synthetic resin to be flowed into the first molding cavity of the first mold 8 after the first axial rods 9 and 10 have been inserted into the first molding cavity. Molding a skin layer 3 on the external surface of the molded core portion 2 by forcing the molten synthetic resin to be flowed into a space between the external surface of the molded core portion 2 and the second molding cavity of the second mold 15 after the molded core portion 2 has been positioned relative to the second molding cavity. Inserting the second axial rods 16 and 17 into apertures formed in the core portion 2 by the first axial rods 9 and 10.
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