Abstract:
This invention concerns an injection moulding process for soles having a coloured treading surface produced with expansible and cross-linking "EVA" compounds involving the use of coloured inserts (5) moulded with the same moulding material used for sole, but of a different colour, fed into cups (4) on the bottom of the mould impression and shut by caps (8) also moulded in the same material used to mould the soles.
Abstract:
The present invention relates to a mold devised for rational molding of footwear bottoms, composed of two overlapping layers made with two different expandible reticulable polyolefin materials, as well as for molding of other manufacts with monolithic structure composed of two overlapping layers of expandible reticulable polyolefin materials.
Abstract:
This invention concerns an injection moulding process for soles in expansible and cross-linking "EVA" based compounds characterised in that during the cooling stage of the moulded sole (1) the spontaneous shrinkage of the same is arrested by means of a template (3) consisting of a rigid shaped plate placed on the sole (1) so that its edge connects with a perimeter edge (2) realised specifically on the upper surface (1a) of the sole (1), whose dimensions reduce no further either during the remaining cooling phase or after cooling.
Abstract:
This patent application concerns a moulded plastic sole with pliable pumping cushion which, as the person wearing the same walks, forces air into the shoe and through an evacuation chamber with which the sole is fitted and which is connected to the exterior by means of one or more breather holes.
Abstract:
This invention concerns an injection moulding process for soles in expansible and cross-linking "EVA" based compounds characterised in that during the cooling stage of the moulded sole (1) the spontaneous shrinkage of the same is arrested by means of a template (3) consisting of a rigid shaped plate placed on the sole (1) so that its edge connects with a perimeter edge (2) realised specifically on the upper surface (1a) of the sole (1), whose dimensions reduce no further either during the remaining cooling phase or after cooling.