The products are processed by extrusion molding, with a smooth surface and high dimensional accuracy. Products of different sizes, colors, and types can be customized according to customer requirements. As a professional extrusion and injection molding company, ETCN provides our clients extrusion stretch blow moulding services with qualified assurance.
Extrusion molding is mainly referred to as the extrusion of a screw or plunger to force a polymer material that is heated and melted under pressure to force it through the die to form a constant A method of forming continuous cross-section profiles. The extrusion molding process mainly includes the processes of feeding, melting and plasticizing, extrusion molding, shaping, and cooling.
The die temperature is too low, the temperature should be increased. The cooling water volume of the sizing sleeve is too large, it should be appropriately reduced.
The raw material is wet, and the content of moisture and volatile matter is too high. If the extrusion temperature is too high, the melt will decompose due to overheating, so the extrusion temperature should be appropriately lowered during the extrusion blow moulding process.
Impurities are mixed into the raw materials, and cracks occur in the impurity parts. The mold core temperature of the injection and extrusion molding is too low and should be increased appropriately. The discharging is uneven, adjust the gap between the die and the core appropriately to ensure uniform discharging.
If the compressed air control of the injection molding extruder is abnormal and the air pressure is unstable. Check the air supply system. The traction speed is uneven, check the traction equipment to make it stable and not skidding.
