Spiral jet polyurethane upper-connected shoemaking device and preparation process thereof

Abstract

The invention discloses a spiral jet polyurethane upper-connected shoemaking device. The device comprises a base, a bottom die device, a left side die and a right side die and further comprises a spiral jet device used for spraying raw materials. The invention further discloses a multi-component polymer mixed spiral jet flow shoemaking preparation process. The process comprises the steps: a bottom die moves to the outer portions of the left side die and the right side die; a plurality of polymer raw materials are added into a feeding mechanism of the spiral jet flow device and sprayed to the shoe sole in a spiral airflow mode, and a jet flow layer used for combining the shoe upper and the shoe sole is formed; and the left mold and the right mold press the shoe last to be combined with the bottom mold, and the polymer jet flow layer sprayed on the shoe sole expands and enters the shoe upper and the shoe sole in a diffusion and permeation mode, so that the shoe upper and the shoe sole can be combined. The bottom die can be conveniently and rapidly replaced and cleaned, the spiral jet flow device can conveniently spray raw materials on the bottom die, widened special shoes and boots can be produced, the jet flow amount is large, the edge track of a formed jet flow conical surface is clear, and the device is suitable for production of all the shoes and boots.

Description

technical field [0001] The invention belongs to the technical field of shoemaking, and relates to a shoe-making device with spiral jet polyurethane uppers, and also relates to a process for making shoes with spiral jet polyurethane uppers. Background technique [0002] In the shoe-making process, the sole and the upper are bonded together by glue. When bonding, the bottom mold, the left mold, and the right mold are pressed together to form extrusion molding. However, in the prior art, when the left mold and the right mold are closed, due to the complex structure of the adjustment device, the occupied space is large, resulting in a small stroke of the left mold and the right mold, and the shoes and mold bases that can be installed are narrow, which cannot satisfy Widen the production demand for special shoes and double-frame three-density shoes and boots, which limits the scope of production. [0003] The installation position of the bottom mold in the prior art is fixed, an...

AI Technical Summary

Problems solved by technology

However, in the prior art, when the left mold and the right mold are closed, due to the complex structure of the adjustment device, the occupied space is large, resulting in a small stroke of the left mold and the right mold, and the shoes and mold bases that can be installed are narrow, which cannot satisfy Widen the production demand for special shoes and double-frame three-density shoes and boots, which limits the scope of production

[0003] The installation position of the bottom mold in the prior art is fixed, and the position cannot be moved. There is only one station. At this station, the mold is closed with the left mold and the right mold by the lifting device, and the injection pressure of the shoes is performed.

The disadvantages of this method are: 1) Since the bottom mold needs to be closed with the left mold and the right mold, the space for installing the bottom mold is limited by the travel of the left mold and the right mold, and it is impossible to use the manipulator to realize the bottom mold cavity. The precise operation of internal spraying leads to uneven spraying of materials on the soles, which affects the quality of the soles; 2) Due to the narrow space, the bottom mold cannot be replaced quickly, which is time-consuming and laborious; 3) Some shoes require no air holes on the shoes, only The bottom is exhausted. Therefore, the mold can only be reverse-chip injection molding, so that the gas is discharged from the sole. However, the distance between the bottom mold and the left and right molds is small. Production of structural footwear

The disadvantages of this shoe-making process are: 1) The production process is relatively complicated, the process parameters are relatively high, and the operating level of the workers is strictly required. If the operation is not done properly, it will not be able to guarantee the stable quality of the glue brushing and make the soles easy to glue; 2) At this stage 8 processes are required, among which the glue brushing process requires a large amount of labor, poor working conditions, large employee turnover, and difficult recruitment; 3) A long glue brushing bottom assembly line with multi-stage ovens, 2 pressing machines, and equipment is required A large amount of investment takes up a lot of production land; 4) The glue used has serious pollution to the environment

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