花纹铝卷是我们经常用的产品，不过有些用户买到的花纹铝卷发脆是怎么回事？其实铝卷发脆主要还是因为有的厂家生产技术原因导致的，生产技术不过关，自然产出的花纹铝卷就容易有发脆现象、
Patterned aluminum roll is a product we often use, but what's the matter with the crispy hair of patterned aluminum roll bought by some users? In fact, the crispness of aluminum coil is mainly caused by the production technology of some manufacturers. If the production technology is not up to standard, naturally produced patterned aluminum coil is prone to crispness
铝卷生产厂家分析具体原因主要集中在以下三个方面：
According to the analysis of aluminum coil manufacturers, the specific reasons mainly focus on the following three aspects:
一.口模截面设计不合理：内筋的分布和交界面角度的处理不当就会会造成应力集中现象存在，从而导致花纹铝卷发脆，需要改进设计和消除交界面处的直角和锐角。
1、 Unreasonable design of die section: improper distribution of inner ribs and interface angle will cause stress concentration, which will lead to embrittlement of patterned aluminum. It is necessary to improve the design and eliminate the right angle and acute angle at the interface.

二.模头压力不足：模头处压力大小是直接受模具的压缩比，特别是模具平直段的长度来决定的。模头的压缩比太小或平直段太短都会造成制品不致密，影响花纹铝卷物理性能。
2、 Insufficient die head pressure: the pressure at the die head is directly determined by the compression ratio of the die, especially the length of the straight section of the die. If the compression ratio of die head is too small or the straight section is too short, the product will not be compact and the physical properties of patterned aluminum coil will be affected.
三.分流筋汇合不良：对于这种情况，应适当增加筋与外表面、筋与筋汇流处的长度，或者增大压缩比来解决，模头压力的改变可以通过改变模头平直段长度来调整流料阻力，在模具设计阶段可选择不同的压缩比来改变挤出压力，但注意机头压缩比要与挤出机螺杆的压缩比相适应，还可以通过改变配方，调整挤出工艺参数，增加多孔板来改变熔体压力的大小。
3、 Poor convergence of splitter bars: in this case, it is necessary to increase the length of bars and outer surface, bars and bars confluence, or increase the compression ratio to solve the problem. The change of die head pressure can be adjusted by changing the length of straight section of die head. In the die design stage, different compression ratio can be selected to change the extrusion pressure, but the compression ratio of die head should be consistent with that of extruder screw According to the compression ratio, the melt pressure can also be changed by changing the formula, adjusting the extrusion process parameters and increasing the porous plate.
以上是花纹铝卷成品常见的发脆原因，用户在购买产品时，一定要选择那些信誉度高，实力过硬的企业来选购自己的产品，避免因为买到质量不达标的产品，而耽误了自己正常的生产。
The above are the common reasons for the embrittlement of patterned aluminum coil products. When purchasing products, users must choose those enterprises with high reputation and strong strength to buy their own products, so as to avoid delaying their normal production because they buy products with substandard quality.