东丽PBT 1164G-30

东丽PBT 1164G-30---The good molding exhaust of PBT is the basis of reducing air bubbles or scorching, and is helpful for cavity filling. Improper or poor exhaust port layout will lead to incomplete filling, poor fusion line strength, uneven shrinkage and warpage, and excessive injection pressure is required to fill the cavity, which will further lead to high stress of parts. For enduran resins, the recommended typical vent sizes are 0.0005-0.0015 inches deep, 0.01-0.03 mm wide, and 0.06-0.20 inches (1.5t-5 mm) wide. The vent hole should be on the mold, at the end of the material flow path. For parts that produce high surface gloss, a proper exhaust port (0.001 inch to 0.015 inch deep) and / or vacuum system is beneficial. When the exhaust is not suitable, the scorch mark or diesel effect will often occur. This is caused by the overheating of the material, which is caused by air entrainment, which will lead to the formation of dark black color. In order to solve this problem, it is necessary to check that the exhaust passage is not blocked, the melt temperature (not overheated), and then reduce the injection rate