Machine and moulds for the production of footwear and other technical or non-technical articles in more than one plastic material and/or colour, with interchangeable mould parts with closed mould-holder

摘要

The invention is a new machine for the production of footwear in more than one plastic material and/or colour, in which the mould-holders are not completely closed, but are provided with large openings whose dimensions permit the insertion and locking of a half-mould, that is, each mould-holder is constituted by the parts that are necessary and sufficient to hold, lift and close the half-moulds. The moulds are constituted by a main part and several secondary parts: the inside of each main has the shape of the upper, except for the parts in more than one material and/or colour, and is provided with compartments or holes in correspondence with said parts of the upper in more than one material or colour; the secondary parts are shaped so that they can be inserted in the compartments or holes provided on the main part of the mould and each of them has the shape of the parts in more than one material or colour to be moulded in the various injection phases. The new machine and the relevant moulds make it possible to produce footwear in different colours and/or plastic materials easily, rapidly and with great precision, with no need to open the moulds, to remove or move the shoes that have been injected only partially, to change the moulds completely, and with no risk that the parts injected successively may be misaligned or imperfect.