What is the effect of excessive clearance between screw and barrel?What is the effect of excessive clearance between screw and barrel?
Influence of excessive gap between screw and barrel:
1. The gap between the screw and the barrel is too large, and the flow rate of the molten material during extrusion is unstable, and the product surface is prone to horizontal wrinkles.
2. The gap is too large, the extrusion melt pressure is unstable, so that the cross-sectional geometry of the product has a large variation in size and size.
3. If the gap is too large, the reflow phenomenon generated when the molten material moves forward in the barrel during extrusion increases, so that the molten material stays in the barrel for too long and turns yellow, which will cause the surface of the product to become discolored or burnt.
4. The gap between the screw and the barrel is too large, making the output of the extruded product unstable or falling.