Discussion on the Production Process of Polypropylene Water Supply Pipe Produced by Extruder

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. is a mechanical equipment manufacturer with nearly 30 years’ experiences of plastic pipe extrusion equipment, new environmental protection and new materials equipment. Since its establishment Fangli has been developed based on user’s demands. Through continuous improvement, independent R&D on the core technology and digestion & absorption of advanced technology and other means, we have developed PVC pipe extrusion line, PP-R pipe extrusion line, PE water supply / gas pipe extrusion line, which was recommended by the Chinese Ministry of Construction to replace imported products. We have gained the title of “First-class Brand in Zhejiang Province”.

Here, we have 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 will provide you with professional equipment procurement suggestions and technical guidance.

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