Patent ID: 11884036
Assignee: STEMMA SRL
Field: Other special machines (Mechanical engineering)
Classification: CPC B  A | IPC A  B

Claim 12:
13. A method of manufacturing a shoe by direct injection molding a sole onto an upper, wherein the sole comprises, a tread and a midsole, wherein the midsole is composed of a first layer and a second layer;
the method comprising the following steps:
providing a mould according to claim 1;
positioning the first half-rings so as to abut against the base and be arranged close to the lid, in order to adopt a first intermediate configuration;
closing the second half-rings so as to abut against the lid, in order to define a first intermediate mould cavity with the base and the first half-rings;
injecting a first polymeric mixture inside said first intermediate mould cavity;
moving the base and the first half-rings towards the lid so as to abut against the lid, in order to define the first mould cavity for forming the first layer of the midsole;
moving the base and the first half-rings away from the lid;
closing the second half-rings so that they enclose the first half-rings and abut against the upper fitted onto the mould last, in order to define a second intermediate mould cavity with the base and the first half-rings;
injecting a second polymeric mixture inside said second intermediate mould cavity;
moving the base and the first half-rings towards the second half-rings so that the first half-rings abut against the second half-rings, in order to define the second mould cavity for forming the second layer of the midsole;
opening the second half-rings;
opening the first half-rings;
removing the shoe from the mould last.