Importance

Loading Importance Indicators...

Abstract

An injection mold device for forming an article such as footwear from a plastic material includes a two-part male die such as a boot last, a fabric liner covering the male die, and a split female die surrounding the male die in spaced relation and forming together therewith a mold cavity. Beyond the upper end of the cavity, liner retaining pins on the male die extend outwardly of the peripheral wall thereof for retaining the liner in place during the injection molding operation. One of the pins is mounted for retracting axial movement for disengaging the tip thereof from the liner, and such pin bears against a sloping bearing surface of a first removable male die part which facilitates such retracting movement upon a relative shifting of the parts. The other pins are rigidly mounted in the male die part and project into recesses of the female die having undercuts and grooves extending between the recesses and the mold cavity. The grooves, when filled, define plugs which adhere to the liner and are removable together with the liner from the rigidly mounted pins upon removal of the female die, the plugs being separated from the female die at the removal thereof.

Loading the Abstract Image...

First Claim