Polypropylene water supply pipe is a kind of plastic pipe which is extruded by single screw extruder with polypropylene resin as the main raw material. This kind of pipe has the characteristics of lightest weight, non toxicity, acid resistance, chemical corrosion resistance, good toughness, good heat resistance and so on. At the same time, it can be used for a long time under the condition of high temperature and low load. Now it is mainly used in water supply, water drainage, farmland irrigation and various chemical liquid and gas pipelines.
Ningbo Fangli Technology Co., Ltd., as a manufacturer with a complete set of extruder production line equipment for nearly 30 years, has sorted out some production processes of polypropylene water supply pipe. The details are as follows:
1、Raw material selection
The PP resin used in polypropylene water supply pipe produced by extruder needs to choose the resin with melt flow rate in the range of 0.2 ~ 3G / 10min. It is suggested to use high-quality resin from large factories to ensure the quality of plastic products.
2、Equipment selection of extruder production line
The extruder is used to extrude the resin. At present, the general single screw extruder is mainly used in the plastic products factory. Generally, we suggest that the screw structure of the extruder equipment should be equidistant gradual change type, with the length diameter ratio of 25 ~ 30:1 and the compression ratio of 2.5 ~ 4.5.
The pipe forming die structure used on the extruder head is mostly straight through structure, the straight part of the core bar is L(long)= (2-5) D (D is the diameter of the pipe. If the diameter value is small, the larger value will be taken. If the diameter of the pipe is large, the smaller value will be chosen). The inner diameter of the sizing sleeve d = D/ (1-shrinkage of the pipe) (the shrinkage rate of the pipe is generally 0.27% - 0.47%).
3、Control range of process temperature on extruder equipment
The heating temperature of extruder barrel from feeding section to homogenizing section is 150 ~ 170 ℃, 170 ~ 190 ℃, 200 ~ 220 ℃. The temperature control range of die at extruder head is 190 ~ 220 ℃.
The above are some simple information about the production process of polypropylene water supply pipe produced by extruder. We hope to provide you with some help. If you have any demand, please call us for detailed inquiry. We Ningbo Fangli Technology Co., Ltd. will provide you with professional equipment procurement suggestions and technical guidance.