Core Components of PVC Pipe Extrusion Line

PVC pipe extrusion line mainly consists of extruder, vacuum sizing tank, spray tank, haul-off machine, slitter or winder and control system. In the raw material processing stage, polyvinyl chloride resin and various additives are accurately proportioned and mixed to ensure the uniformity of raw materials and guarantee the physical and chemical properties of pipes. The extruder melts and plasticizes the solid raw materials through the synergistic effect of the screw's rotation and the heating device to form a fluid melt. The cavity is designed according to different pipe specifications to make the melt initially formed into a tubular blank, and the blank temperature is quickly reduced to solidify and maintain precise geometric dimensions. The haul-off equipment continuously hauls and cuts the formed pipe according to the set length to finally form a finished product. ​

Process characteristics and quality control of the production line
The process characteristics of the PVC pipe extrusion line directly affect the comprehensive performance of the pipe. The core lies in the transformation of raw material performance into product performance through precise parameter control. In the plasticizing stage, the screw speed and heating temperature must be strictly controlled to ensure that the raw materials are fully melted and do not undergo thermal degradation. The mold design needs to take into account the melt flow characteristics to avoid the wall thickness deviation of the pipe due to uneven flow rate, which in turn affects the pressure resistance. During the cooling and shaping process, the uniformity of the cooling rate is crucial to the dimensional stability of the pipe. Too fast or too slow cooling will cause stress concentration in the pipe and reduce its service life. The matching degree between the traction speed and the extrusion speed determines the consistency of the wall thickness of the pipe, which is the key to ensuring the stable operation of the pipe under different pressure scenarios. The control system of the production line realizes automatic adjustment by real-time monitoring of the parameters of each link to ensure the stability of the performance of each batch of pipes, thereby supporting the long-term and reliable application of PVC pipes in the fields of building water supply and drainage, municipal engineering, etc. ​

Technical innovation direction of the production line​
The application field of PVC pipes continues to expand, and the technological innovation of its extrusion production line continues to advance around performance improvement and efficiency optimization. In terms of energy saving, the application of new screw design and variable frequency drive technology reduces the energy consumption of equipment, improves energy utilization through the waste heat recovery system, and forms a synergy with the environmental protection properties of PVC pipes themselves. In response to the production needs of pipes of different pressure levels, the production line can achieve rapid changeover through modular mold design, and can produce a variety of specifications from low pressure to high pressure without replacing the equipment as a whole, thus enhancing the flexibility of production. In terms of intelligence, the combination of online detection equipment and AI algorithms can monitor key indicators such as wall thickness and roundness of pipes in real time, and automatically feedback and adjust production parameters, reduce manual intervention, and improve product qualification rate. In response to the environmental protection requirements of recyclability, the production line optimizes the adaptability of raw material formula, and can be compatible with a certain proportion of recycled materials, so as to improve the resource recycling rate while ensuring product performance. ​

Adaptation logic of production line and application scenarios​
The design and optimization of PVC pipe extrusion line always takes the adaptation of application needs in different fields as the core goal. In response to the requirements of building water supply and drainage systems for the convenience of pipe installation, the production line can ensure the efficient implementation of methods such as gluing and threaded connection by precisely controlling the outer diameter tolerance and surface smoothness of the pipe. The high requirements of municipal water supply and sewage pipes for corrosion resistance and durability are achieved through the strict control of raw material formula and stable operation of extrusion process of the production line, so as to ensure the long-term use of pipes in complex water quality environments. In the field of agricultural irrigation, the friction coefficient of the pipe directly affects the water delivery efficiency. The production line optimizes the mold flow channel and cooling and shaping process to ensure the smoothness of the inner wall of the pipe and reduce fluid resistance. For the high pressure resistance required by industrial chemical pipelines, the production line can adjust the extrusion pressure and wall thickness control parameters to produce thick-walled pipes that meet the requirements of high-pressure transportation.