In the entire process of aluminum coil production, in order to assist in changing its appearance, aluminum coil manufacturers must carry out high-temperature heating to solve it. In high temperature conditions, it will be relatively soft and its appearance is very easy to undergo some changes. After adjusting the appearance, its temperature can be reduced to maintain a certain strength. However, in some cases, after high-temperature cooling, Aluminum coils may encounter some rolling difficulties, what is the reason for this

制冷时候出現弯折状况，缘故为：一般风冷式的标准下，铝卷的每个部位与气体触碰的传热指数均差不多，但由于厚度或样子不一样，各部位的热管散热速率不平衡，铝卷生产厂家导致薄壁部或中空管的热管散热速率比厚壁部慢，导致它在制冷时候出現向中空部位或壁厚偏厚的部位坎坷的状况。

The reason for the bending phenomenon during refrigeration is that under the standard of air cooling, the heat transfer index of each part of the aluminum coil is similar to that of the gas contact. However, due to the different thickness or appearance, the heat dissipation rate of each part of the heat pipe is uneven. The aluminum coil manufacturer causes the heat dissipation rate of the thin-walled or hollow pipe to be slower than that of the thick wall part, resulting in bumpiness towards the hollow or thicker wall parts during refrigeration.

弯折缘故及全过程以下：

The reasons for bending and the entire process are as follows:

1、厚壁一部分温度降低快，先造成收缩力，薄壁一部分或中空管一部分温度降低慢，基本上沒有收缩力

1. A part of the thick wall temperature decreases quickly, causing shrinkage force first. A part of the thin wall or hollow tube temperature decreases slowly, and there is basically no shrinkage force

2、厚壁一部分截面较小，造成的收缩力较小，或被光缆牵引机驱动力清除

2. A portion of the thick wall has a smaller cross-section, resulting in less shrinkage force or being removed by the driving force of the fiber optic cable traction machine

3、离去光缆牵引机，温度再次降低

3. Leaving the fiber optic cable tractor, the temperature drops again

4、薄壁一部分或中空管一部分截面很大，伴随着温度降低慢慢造成很大收缩力，厚壁一部分温度已大幅度降低，已不造成收缩力或收缩力较小

4. A thin-walled part or a hollow tube with a large cross-section, accompanied by a gradual decrease in temperature, causes a significant contraction force, while a thick wall part has a significant decrease in temperature, no longer causing shrinkage force or a small shrinkage force

5、铝卷横截面上遭受的收缩力尺寸不匀，沿挤压成型方位往薄壁一部分或中空管一部分弯折。

5. The shrinkage force on the cross-section of the aluminum coil is uneven in size, and it bends towards a thin-walled part or a hollow tube part along the extrusion forming direction.

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This article is a friendly contribution from aluminum coil manufacturers. For more information, please click on: http://www.jndclyyxgs.com Sincere attitude. We will provide you with comprehensive services. We will gradually contribute more relevant knowledge to everyone. Stay tuned.