Method of making injection molded footwear

摘要

A method of making injection molded footwear includes placing a last into the internal cavity of a mold with the last and cavity being configured such that there is a space between them which is greater than the desired thickness of the footwear skin. An elastically deformable scrim is placed over the last before the last is paced in the mold. The scrim has a first thickness when not compressed and a second thickness when compressed. The difference between the first and second thickness is approximately equal to the desired thickness of the footwear skin.

主权项

1. A method of making injection molded footwear with an upper skin having a predetermined thickness, comprising:
a) providing a last; b) providing a mold having an internal cavity which is configured to receive said last with there being a space between said cavity and said last having a predetermined width which is greater than said predetermined thickness; c) placing a scrim over said last before said last is placed in said mold, said scrim being made from an elastically deformable material having a first thickness when not compressed and a second thickness when substantially compressed; d) the difference between said first and second thicknesses being approximately equal to said predetermined thickness; and e) infecting a fluid thermal plastic material between said mold and said last at a pressure between 300,000 and 400,000 pounds per square inch to compress said scrim to said second thickness.