Method and device of free-stitching shoe face air-isolation fusion welding pressurization

Abstract

The invention discloses a method and a device of free-stitching shoe face air-isolation fusion welding pressurization. The method comprises the following steps that S1. a to-be-processed shoe face isplaced on a working table, wherein the to-be-processed shoe face is formed by laminating a plurality of layers of shoe face materials; S2, a pressurization cover is arranged, and the pressurization cover and the working table are oppositely closed and tightly compressed, wherein the pressurization cover comprises an airtight cover and a silica gel membrane, the airtight cover is connected with a non-contact heating device, and the silica gel membrane covers the to-be-processed shoe face; and S3, air is inflated into the pressurization cover, so that the silica gel membrane is made to form a coated pressurization pressure on the to-be-processed shoe face; and the heating device is used for carrying out non-contact fusion welding processing on the to-be-machined shoe face; and the pressurization cover, the working table and the heating device are correspondingly arranged according to the method by the device. According to the method and the device, a pressure applying limit with maxim ofonly 0.1 MPa of the vacuum coating is overcome; and the ionization breakdown voltage of an air medium when high-frequency fusion welding is performed can be greatly improved, an optimal fusion welding effect can be obtained, and the product quality is improved.

Description

technical field [0001] The invention relates to the field of shoe upper processing, in particular to a method and device for welding and pressurizing a non-sewed upper in space. Background technique [0002] In the field of shoemaking, the non-sewing process of shoes is to fuse the multi-layer upper materials together after melting the hot-melt film, which can save the sewing process, improve the appearance of the product, and increase the production efficiency. The existing processing method is to heat and press the shoe upper material through a mold to melt and shape it. [0003] Due to the problem of glue overflow when applying pressure through the mold, and the direct contact and extrusion of the shoe upper material by the mold will affect the surface effect of the shoe material, so non-contact welding processing has become an important development direction of shoe upper technology. [0004] The inventor discloses a vacuum high-frequency processing method for non-sewin...

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Problems solved by technology

[0005] 1) The maximum negative pressure formed by vacuum is only 0.1MPa, and the pressure required for most shoe uppers is greater than 0.1MPa, so there are still many shoe uppers that can only be processed through molds;

[0006] 2) Especially when high frequency is used for shoe upper welding processing, when the high frequency electric field strength increases to a certain value, it is easy to cause air medium ionization breakdown, resulting in arc discharge (commonly known as sparking), resulting in upper material, thin The silicone membrane and the bottom insulating silicone pad are scrapped, and every time a fire is fired, it will cause a loss of tens of yuan or even hundreds of yuan!

[0008] For the first point above, what the technicians in this industry think of is to increase the vacuum pump, set up the vacuum tank, increase the vacuum degree and optimize the airway, in order to make the thin silicone film cover the shoe upper to be processed instantly through rapid pumping to achieve The purpose of improving the suction, but did not realize that the maximum negative pressure that the vacuum pump can provide has a limit of 0.1MPa, so the effect is very small; and for the second point above, the high-frequency equipment is ignited due to the breakdown of the medium (workpiece) , is a long-standing and difficult problem of high-frequency equipment. Technicians in this industry have long been familiar with this phenomenon. no effective technical solution

Any one of the above two points is enough to greatly limit the scope of application of the non-contact welding process for non-sewn uppers, which seriously restricts the development prospects of the non-contact welding process for non-sewn uppers.

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