What are the main reasons for the bad mouthing of shoes? What should be solved

The bad mouth points out that when the shoe is worn, the parts of the shoe, such as the mouth of the shoe, the pinhole, the back of the shoe, and the bar, are torn.
The main causes of bad mouth are design, processing technology and materials.
The main reasons for the bad design in terms of design are: the division of the helpers is not carried out according to the rules of the foot type and the 楦 type structure; the sizes and proportions of the parts are irrational (such as the mouth, shoes, etc.); the model processing (especially the music跷 跷 跷 跷 跷 缝 缝 缝 缝 缝 缝 缝 缝 缝 缝 缝 缝 缝 缝 缝 缝 缝 缝 缝 缝 缝 缝 缝 缝. Mistakes in the above design may cause stress concentration on the part or the part of the upper surface. Under the action of the dislocating force, the external stress of the local position of the part or the upper surface of the upper part exceeds its ultimate strength, and thus a bad mouth phenomenon occurs.

Processing technology; may cause bad mouth is mainly due to the edge of the part after the edge of the part is too thin; folded concave arc edge, the cut too deep; stitch needle code is too small, the tension of the surface line and the bottom line are Too large; drying setting and drying temperature is too high, time is too long; out of the wrong way. Mistakes in the above-mentioned processing techniques can lead to a decrease in the strength of the upper material, especially the edge of the component, and a bad phenomenon in the output process.

The improper use of the upper material may also lead to bad phenomena, such as the use of low-strength, poor-quality uppers, mismatched upper materials, and products.

If there is a bad phenomenon during the exit process, the cause should be promptly searched and appropriate measures taken. If it is a design reason, you must stop using the original design, modify the model or use a suitable shoe last; if it is the reason for the processing process, you need to adjust the corresponding process conditions or processing parameters; if it is a helper material For the reason, the replacement of upper materials or reinforcement measures should be used. For products that have entered the bottom combination process, remedial measures can be used to try their best to remedy the problem; if it is not possible to remedy the problem, first brush the warm water on the vulnerable parts or parts to soften the surface and increase the leather extensibility. When you go out, you have to use slow force and you should not yank and mammoth.

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