CS276642B6 - Mould for two-stage vulcanization of a footwear multicolored sole - Google Patents

Abstract

The upper mold part (5) is provided with ribs (6) and the mold cover (1) is sealed inserts (4) located in the grooves (3).

Description

Mold for two-stage vulcanization of a multicolored sole of footwear

Field of technology

The invention relates to a mold for two-stage vulcanization of a multicolored shoe sole, in particular for shoe vulcanizing presses.

Prior art

The basis of the known production of footwear with a multicolored sole is multicolored unit soles produced in separate forms, which are connected to the shoe uppers in various devices by various production operations. 3e shows a known method for the production of multicolored unit soles in tray presses, in which preformed pre-vulcanized multicolored rubber segments are inserted into the molds of the tray presses; which in the next phase of vulcanization are vulcanized into the inserted sections of the sole. Another known method of producing multicolored unit soles is carried out by gradual vulcanization in floor molds of footwear in several-stage molds, where each colored rubber mixture requires a new replaceable part of the mold with further vulcanization. The multicolored rubber soles formed in this way are further inserted into other molds, where they are connected by injection molding of polyurethane to the shoe uppers, or the finished multicolored rubber soles are glued or glued and sewn to the shoe uppers in further work operations. These methods require very complex production equipment and have a high stage of manual work.

The essence of the invention

These disadvantages are eliminated by the mold for two-stage vulcanization of the multicolored sole of the shoe according to the invention, the essence of which is that the upper part of the mold is provided with ribs and the lid of the mold is provided with sealing inserts located in the grooves.

The advantage of the mold according to the invention in comparison with the prior art lies in the simplification of the production of footwear with a multicolored rubber sole on vulcanizing presses in comparison with the production of footwear with a multicolored rubber sole on floor presses, while achieving energy and labor savings. An advantage of the mold according to the invention is also that when it is used, a precise color interface is achieved in the production of the multicolored rubber sole and the joining of the multicolored rubber sole in the shoe upper in two vulcanization cycles is performed in one production plant.

Overview of figures in the drawings

The accompanying drawings show an exemplary embodiment of a mold for two-stage vulcanization of a multicolored shoe sole according to the invention.

Fig. 1 shows a longitudinal section of the upper part of the mold, the lid of the mold with the base and the pre-vulcanized tread part of the sole.

Fig. 2 shows a longitudinal section of the upper part of the mold, the jaws and the foot with the shoe on with a multicolored sole.

Example of an embodiment of the invention

The upper part of the mold 5 is provided with ribs 6, against which sealing inserts 4 made of a material required to withstand the vulcanization temperatures without damage are placed in the grooves 3 of the mold lid 1. For this case, the sealing inserts 4 are made of Teflon. The shape of the sealing inserts 4 corresponds to the shape of the ribs 6. There are spaces Θ between the surface of the upper part of the mold 5, the surface of the lid of the mold 6, the ribs 6 and the sealing inserts 4. The lid of the mold 1 is mounted on a base 2, as shown in Fig. 1. The closed mold consists of an upper part of the mold 5, provided with ribs 6, a jaw 10 and a foot 9, as shown in Fig. 2.

Manufacture of footwear with multicolored soles consisting, for the case being, of textile uppers

CS 276 642 B6 2 of the shoe 14, from the foot part 7 of the sole 7 with the first and second colored parts 12 and 13 and the midsole layer -11, is performed in such a way that the machine operator loads an unvulcanized cut-out of the foot part 7 with openings of the respective shape in places where there will be other colored parts. Then the machine operator inserts the thus loaded mold lid JL with the base 2 into the pressing station of the machine, where the vulcanization mold is closed so that when clamping the mold the ribs 6 first abut the sealing inserts 4 and thus seal the spaces B so that it cannot penetrate. rubber from the loaded cut-out of the sole 7. The tread Part 7 is pre-vulcanized. After the pre-vulcanization is completed, the machine operator removes the mold lid 11 with the base 2 from the press station, while the pre-vulcanized sole tread 7 remains attached to the upper part of the mold 5. The machine operator then loads an unvulcanized cut-out layer 11 which loads the cut-outs for the first and second colored parts 12 and 13 in the given places. He slides the leg 9 loaded in this way into the pressing station of the machine and performs the final vulcanization of the shoe sole with its vulcanization on the upper. After the vulcanization is completed, the machine operator slides the foot 9 with the finished shoe out of the press station of the machine, removes the finished shoe with the multicolored sole from the foot 9 and can repeat the whole production cycle.

Industrial applicability

The mold for two-stage vulcanization of the multicolored sole of footwear according to the invention can be used in particular in the production of rubber-textile, rubber-shaped; combined or all-rubber footwear manufactured on vulcanisation footwear presses.

Claims (1)

PATENT CLAIMS Mold for two-stage vulcanization of a multicolored shoe sole, in particular with a textile or leather upper with the aid of a pre-vulcanized sole part consisting of a mold jaw, foot, upper mold part and mold lid with base, characterized in that the upper mold part (5) is provided with ribs (6) and the mold lid (1) is provided with sealing inserts (4) located in the grooves (3).