PVC pipe equipment how to produce smooth, uniform and stable quality pipe. First of all, in the raw materials, select high-quality and uniform particle size, high purity, low moisture content of PVC resin, strictly control the quality of raw materials. Secondly, in terms of equipment, regular and meticulous maintenance, including checking whether the screw of the extruder is worn, whether the barrel is clean, and whether the head and mold are normal. There are also process parameters to be precisely regulated, such as the heating temperature of the extruder is appropriate and evenly distributed, and the screw speed, extrusion pressure and traction speed are reasonably matched. The cooling link ensures that the water temperature of the cooling tank is constant and the water flow is uniform to achieve uniform cooling. Finally, we should pay attention to quality testing, increase the frequency of sampling inspection, and adjust the process in time to ensure that the pipe meets the standard.
Raw materials contain impurities, such as dust, foreign bodies, etc.
Raw materials are damp and the moisture content is too high.
The plasticizing performance of raw materials is poor, which may be due to unreasonable formulation or poor quality of raw materials themselves.
Extruder screw wear, resulting in uneven plasticization of the material.
The flow path of the machine head and the mold is not smooth, and there are scratches or foreign objects attached.
The heating system is faulty, the temperature distribution is uneven, and the temperature in some areas is too low or too high.
The extrusion temperature is set improperly, too low leads to insufficient plasticization, and too high may cause material decomposition.
The screw speed is not suitable, too fast or too slow will affect the plasticization and extrusion effect of the material.
The cooling is not uniform and the pipe shrinks inconsistently during the cooling process.
Strengthen the screening and purification of raw materials, and use filtration devices to remove impurities.
The raw materials should be fully dried to control the moisture within a reasonable range.
Optimize the formulation of raw materials and select suitable additives to improve plasticizing performance.
Replace the worn screw in time.
Clean and maintain the machine head and mold regularly to ensure smooth flow path.
Overhaul heating system to ensure accuracy and stability of temperature control.
Adjust the appropriate extrusion temperature and find the best temperature range through the test.
According to the material characteristics and extrusion speed, reasonably set the screw speed.
Optimize the cooling system to ensure uniform pipe cooling.
