Shoe production process and upper heating device for shoe production process

Abstract

The invention discloses a shoe production process and an upper heating device for the shoe production process. According to the technical scheme, the shoe production process includes the steps that a shoe last is sleeved with an upper, and the upper is heated and shaped; the upper obtained in the previous step is placed in the upper heating device to be preheated; the preheated upper in the previous step is placed in an injection molding machine to be subjected to injection molding, and a sole is manufactured at the bottom of the upper through injection molding; and demolding is conducted, and the upper subjected to injection molding is taken out of the injection molding machine. Before the upper is subjected to injection molding, the temperature of the upper is increased, so that plastic is prevented from being quickly cooled when the molten plastic makes contact with the upper due to the fact that the plastic and the upper are moderate in temperature, and the cooling time of the plastic is shortened; since the contact time between the molten plastic and the upper is prolonged, the connecting strength between the injection-molded sole and the upper is effectively improved; and the temperature of the upper is high when the sole makes contact with the upper, and thus the influence caused by heat expansion and cold contraction is lowered, and product quality is improved.

Description

technical field [0001] The invention relates to the technical field of shoe processing, more specifically, it relates to a shoe production process and a shoe upper heating device used in the process. Background technique [0002] At present, the existing shoe upper production process mainly includes the following steps. First, the shoe upper is placed on the shoe tree for oven heating and shaping, and then sent to the shoe making line, and finished shoes are produced through injection molding, mold closing and other processes. [0003] In actual production, after the upper is shaped, the next step is to enter the injection molding machine, inject the upper, and inject the sole at the bottom of the upper. However, during operation, the paint is placed on the upper when the weather is relatively cold. When entering the injection molding machine, the surface temperature of the upper is very low, so when the molten plastic in the injection molding machine contacts the upper, the...

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Problems solved by technology

[0003] In actual production, after the upper is shaped, the next step is to enter the injection molding machine, inject the upper, and inject the sole at the bottom of the upper. However, during operation, the paint is placed on the upper when the weather is relatively cold. When entering the injection molding machine, the surface temperature of the upper is very low, so when the molten plastic in the injection molding machine contacts the upper, the temperature difference is too large. drop

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