花紋鋁卷是我們經常用的產品，不過有些用戶買到的花紋鋁卷發脆是怎么回事？其實鋁卷發脆主要還是因為有的廠家生產技術原因導致的，生產技術不過關，自然產出的花紋鋁卷就容易有發脆現象、
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
鋁卷生產廠家分析具體原因主要集中在以下三個方面：
According to the analysis of aluminum coil manufacturers, the specific reasons mainly focus on the following three aspects:
一.口模截面設計不合理：內筋的分布和交界面角度的處理不當就會會造成應力集中現象存在，從而導致花紋鋁卷發脆，需要改進設計和消除交界面處的直角和銳角。
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.模頭壓力不足：模頭處壓力大小是直接受模具的壓縮比，非常是模具平直段的長度來決定的。模頭的壓縮比太小或平直段太短都會造成制品不致密，影響花紋鋁卷物理性能。
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.分流筋匯合不良：對于這種情況，應適當增加筋與外表面、筋與筋匯流處的長度，或者提升壓縮比來解決，模頭壓力的改變可以通過改變模頭平直段長度來調整流料阻力，在模具設計階段可選擇不同的壓縮比來改變擠出壓力，但注意機頭壓縮比要與擠出機螺桿的壓縮比相適應，還可以通過改變配方，調整擠出工藝參數，增加多孔板來改變熔體壓力的大小。
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.
以上是花紋鋁卷成品常見的發脆原因，用戶在購買產品時，一定要選擇那些信譽度高，實力過硬的企業來選購自己的產品，避免因為買到質量不達標的產品，而耽誤了自己正常的生產。
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.