How to improve one of the most common problems in three screw granulation machining

Shrinkage of three screw pelletizer is one of the most common problems in plastic granulating machine.

Shrinking is a tricky problem!

Therefore, with the continuous improvement of the machining process of the three screw granulator, in order to minimize the shrinkage of the plastic granulating machine and improve the quality of the product, it is imperative for the mechanical processing shrinkage of the three screw granulator to shrink the shrinkage link of the plastic granulating machine. Cooling channel design, gate type and gate size may have multiple effects. For example, a small gate, such as a tube gate, is much cooler than a cone-shaped gate. Premature cooling at the gate reduces the filling time in the cavity, thereby increasing the probability of shrinkage.

For molding workers, adjusting the processing conditions is a way to solve the problem of mechanical shrinkage of plastics granulation. The filling pressure and time significantly affect the contraction. After the components are filled, the excess data will continue to be filled into the cavity to compensate for the shrinkage of the material. The filling stage is too short, which will cause the shrinkage to intensify, and eventually there will be more or larger shrinkage marks. This kind of plastic granulating mechanical shrinkage method itself may not reduce the shrinkage to the satisfactory level, but the molding worker can adjust the filling condition to improve the shrinkage mark