Method for Manufacturing Footwear Last, and Footwear Last Manufactured by the Method
AssigneeNIKE, Inc.
InventorsKyoo-Heung Yoon, Yong-Joo Chon, Sin-Woo Kim, Kil-Po Kim, Won-Kwon Lee
Life of this patent
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Abstract
Provided is a footwear last, being of a structure where its interior is hollow. The method includes steps of installing a parison for manufacturing a plastic vessel between left/right molds for manufacturing the footwear last, with the left/right molds opened; injecting a last manufacturing material into a tube of the parison; blowing air while closing the left/right molds; molding the material in a temperature of about 400 C to 70° C. and under an injection pressure of about 600 kg/cm2 to 1400 kg/cm2; and completing the last whose interior is hollow.
Claims6
A footwear last, being of a structure where its interior is hollow.
A method for manufacturing a footwear last using an injection blow molding method.
Dependencies are inferred from the claim text.