Air hole-free shoes tree processing method and special heat treatment shaping machine using the said method

Abstract

The invention discloses a process for preparing boot last without gas hole, comprising: A. injecting to form boot last blank and de-molding, B. cooling, C. nicking boot last. The process is characterized in that: the cooling step comprises following steps: fast cooling surface of boot last blank to solidify and form solidified thin layer, then cooling gradually in environment with temperature dropping from high to low. The boot last is characterized by high intensity and accuracy, and greatly increased rate of finished products. The invention also provides a private heat treating forming machine used in said process, comprising shell, shell is equipped with multiplayer conveyer belts up-and-down, one end of each conveyer belt expect bottom one and sealed shell is equipped with vacant sitefor boot last dropping, vacant site distributes interlaced side-to-side from top conveyor belt, the bottom of shell is provided with a plurality of hot gas feeding port with outlet located inwardly, hot gas feeding port is connected to hot gas source, shell is equipped with blank feeding port in relative to top conveyor belt and blank discharging port in relative to bottom conveyor belt.

Description

technical field [0001] The invention relates to a processing method of a plastic shoe last, in particular to a processing method of a plastic shoe last with only tiny pores inside. The present invention also relates to a special shoe last heat treatment setting machine in the above processing method. Background technique [0002] At present, the production of shoe lasts in the factory generally includes A, injection molding to form a last embryo and demoulding, B, cooling the demoulded last embryo, C, performing a lasting process on the cooled last embryo and finalizing the finished product, in step B The cooling treatment of the last blank is generally to immerse the very high temperature last blank in hot water at about 85°C for a long time after demoulding, and soak for about 24 hours. During the curing process, the temperature gradient from outside to inside changes greatly, and vacuum shrinkage cavities will be formed due to thermal stress. Vacuum shrinkage cavities ha...

AI Technical Summary

Problems solved by technology

[0002] At present, the production of shoe lasts in the factory generally includes A, injection molding to form a last embryo and demoulding, B, cooling the demoulded last embryo, C, performing a lasting process on the cooled last embryo and finalizing the finished product, in step B The cooling treatment of the last blank is generally to immerse the very high temperature last blank in hot water at about 85°C for a long time after demoulding, and soak for about 24 hours. During the curing process, the temperature gradient from outside to inside changes greatly, and vacuum shrinkage cavities will be formed due to thermal stress. Vacuum shrinkage cavities have a great influence on the strength and accuracy of the last blank. Internally, it cannot be found by conventional detection methods. Therefore, there is a hidden danger of waste caused by vacuum shrinkage after injection molding from the last blank. A large number of last blanks break during the processing process. Waste shrinkage, because shrinkage is inevitable in the production process of traditional crafts and cannot be discovered in time, it will cause huge material and labor costs in the production process of last making and shoemaking. After the last blank with hidden vacuum shrinkage is processed into finished products, it will also lead to the reduction of the quality and precision of the shoe last, as well as the shrinkage of the size

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