Apparatus for molding footwear

Details Apparatus for molding footwear Apparatus for molding footwear

1988-02-25

1989-12-12

Silbaugh, Jan H.

Static molds

Uniting preform with molding material

249107, 264244, 425119, 4251292, A43D 6500

Patent

active

048862380

ABSTRACT:
Apparatus and method for injecting molten plastics material into a midsole cavity by the provision of channels entirely within at least one-half of a split side mold defining sides of the cavity. This arrangement eliminates the problems associated with injecting the molten plastics along a channel formed in the parting line between the side mold halves and particularly overcomes the problem of injecting molten plastics material incorporating a blowing agent to provide closed cells in the midsole.

REFERENCES:
patent: 3026575 (1962-03-01), Lusher et al.
patent: 3319301 (1967-05-01), Ludwig
patent: 3555609 (1971-01-01), Chu et al.
patent: 3670070 (1972-06-01), Appleton
patent: 4296053 (1981-10-01), Doerer et al.
patent: 4302416 (1981-11-01), Rudolf et al.

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