US 11,707,901 B2
Mould and method for producing footwear
Ettore Bordin, Montebelluna (IT); and Stefano Pellizzari, Montebelluna (IT)
Assigned to STEMMA SRL, Cornuda (IT)
Appl. No. 17/289,361
Filed by STEMMA SRL, Cornuda (IT)
PCT Filed Oct. 29, 2019, PCT No. PCT/IB2019/059251
§ 371(c)(1), (2) Date Apr. 28, 2021,
PCT Pub. No. WO2020/089784, PCT Pub. Date May 7, 2020.
Claims priority of application No. 102018000009893 (IT), filed on Oct. 30, 2018.
Prior Publication US 2021/0379854 A1, Dec. 9, 2021
Int. Cl. B29D 35/14 (2010.01); B29D 35/08 (2010.01)
CPC B29D 35/148 (2013.01) [B29D 35/082 (2013.01); B29D 35/084 (2013.01); B29D 35/142 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A mould for producing footwear by means of direct injection onto an upper of a sole comprising a tread and a midsole, wherein the midsole is composed of a first layer and a second layer;
the mould comprising a base, a pair of first half-rings, a pair of second half-rings, a first cover, a second cover and a mould last, wherein the first half-rings are designed to be brought together so as to abut against the base and against the first cover, so as to form a first mould cavity for moulding the tread, and/or to abut against the base and against the second cover, so to form a second mould cavity for moulding the first layer of the midsole; and
wherein, with the first half-rings abutting against the base, the second half-rings are designed to be brought together, so as to be superimposed on the first half-rings and to abut against the upper, fitted onto the mould last, so as form a third mould cavity for moulding the second layer of the midsole;
the mould being characterized in that it comprises gripping means designed to fix selectively the first half-rings to the base or to the second half-rings.