US 2020/0223167 A1 · MOULD AND METHOD FOR PRODUCING FOOTWEAR

Abstract

The present invention relates to a mould (10) for producing footwear (1) by direct injection onto an upper (2) of a sole (3), comprising a tread (5) and a midsole (4), wherein the midsole (4) is composed of a first layer (6) and a second layer (7). The mould (10) comprises a base (12), a pair of first half-rings (16), a lid (18), a pair of second half-rings (20) and a mould last (22). The first half-rings (16) are designed to be arranged close together such that they abut against the base (12) and against the lid (18), so as to form a first mould cavity for moulding the first layer (6) of the midsole (4). While the first half-rings (16) are abutting against the base (12), the second half-rings (20) are designed to be arranged close together, such that they lie over the half-rings (16) and abut against the upper (2), fitted onto the mould last (22), so as to form a second mould cavity for moulding the second layer (7) of the midsole (4). In accordance with the invention the first half-rings (16) are provided with guiding means (24) so that they can be moved away from and towards each other and rotate about an axis of rotation (C). The invention also relates to a method for producing footwear by direct injection onto an upper, which may be performed by means of the mould according to the invention.

Claims20

Dependent claims

Mould (10) for producing a shoe (1) by direct injection onto an upper (2) of a sole (3), comprising a tread (5) and a midsole (4), wherein the midsole (4) is composed of a first layer (6) and a second layer (7);

the mould (10) comprising a base (12), a pair of first half-rings (16), a lid (18), a pair of second half-rings (20) and a mould last (22), wherein the first half-rings (16) are designed to be arranged close together such that they abut against the base (12) and against the lid (18), so as to define a first mould cavity (13) for moulding the first layer (6) of the midsole (4), and wherein, while the first half-rings (16) are abutting against the base (12), the second half-rings (20) are designed to be arranged close together, such that they lie over the first half-rings (16) and abut against the upper (2), fitted onto the mould last (22), so as to define a second mould cavity (15) for moulding the second layer (7) of the midsole (4);
the mould (10) being characterized in that the first half-rings (16) are provided with guiding means (24), designed to slidably engage with corresponding guiding means (26) provided in the base (12), so as to allow the first half-rings (16) to be moved away from and towards each other, the first half-rings (16) being hinged at the bottom with said guiding means (24) so as to be able to rotate about an axis of rotation (C).

Method of manufacturing a shoe (1) by direct injection onto an upper (2) of a sole (3), comprising a tread (5) and a midsole (4), wherein the midsole (4) is composed of a first layer (6) and a second layer (7);

the method comprising the following steps:
providing a mould (10) according to any one of the preceding claims;
positioning the first half-rings (16) so as to abut against the base (12) and be arranged close to the lid (18), in order to adopt a first intermediate configuration;
closing the second half-rings (20) so as to abut against the lid (18), in order to define a first intermediate mould cavity (17) with the base (12) and the first half-rings (16);
injecting (I) a first polymeric mixture inside said first intermediate mould cavity (17);
moving the base (12) and the first half-rings (16) towards the lid (18) so as to abut against the lid (18), in order to define the first mould cavity (13) for forming the first layer (6) of the midsole (4);
moving the base (12) and the first half-rings (16) away from the lid (18);
closing the second half-rings (20) so that they enclose the first half-rings (16) and abut against the upper (2) fitted onto the mould last (22), in order to define a second intermediate mould cavity (21) with the base (12) and the first half-rings (16);
injecting (H) a second polymeric mixture inside said second intermediate mould cavity (21);
moving the base (12) and the first half-rings (16) towards the second half-rings (20) so that the first half-rings (16) abut against the second half-rings (20), in order to define the second mould cavity (15) for forming the second layer (7) of the midsole (4);
opening the second half-rings (20);
opening the first half-rings (16);
removing the shoe (1) from the mould last (22).

10 more elements

Dependencies are inferred from the claim text.

Mould and method for producing footwear

Life of this patent

Mould and method for producing footwear

Life of this patent

Abstract

Claims20