With the continuous development of China's economy, the demand for
aluminum plate is increasing. But the quality of
aluminum plate is also has certain defects, production experience, production of
aluminum plate aluminum plate tend to have the phenomenon of brittle, so this is what causes, below small make up to tell you something about the causes, and how to change this phenomenon:
1, due to shunt bar is usually caused by poor convergence performance should be appropriately increased muscle and outside surface, reinforcement and reinforced the confluence of the length, or increase the compression ratios, the change of the die head pressure can change the die head straight length to adjust the material flow resistance; Different compression ratios can be selected to change the extrusion pressure in the mold design stage, but it must be noted that the compression ratio of the machine head is suitable to the compression ratio of the extruder screw. By changing the formula, the extrusion process parameters can be adjusted to increase the size of the melt pressure.
2. Insufficient head pressure. The pressure of the die head is determined directly by the compression ratio of the die, especially the length of the flat section. The compression ratio of the die head is too small or the flat section too short will cause the product not dense, affect the physical performance.
3. Unreasonable cross section design, especially the distribution and interface Angle of the inner ribs. This will result in a stress concentration phenomenon that needs to be improved to design and eliminate the right angles and acute angles at the interface.