Analysis of the Causes of White Spot on Injection Products
Transparent parts in the PS, through the light will show a ray of white smoke, the location and size erratic, mainly due to plastic overheating in the barrel decomposition, and sometimes white smoke will become yellow, or even become a black spot .
Solution:
(1) reduce the material temperature, shorten the material stay in the barrel inside the time, reduce speed and back pressure.
(2) pay attention to check the screw and barrel with the precision, check the plastic head and other wear.
(3) Use less reclaimed material to screen out the harmful crumbs, and eliminate the contamination of the dissimilar plastic in the barrels and raw materials.