What is the core composition of the PE water supply pipe production lineWhat is the core composition of the PE water supply pipe production line
One of the indispensable links in the PE pipe production line is how to use the sizing device correctly. The PE pipe melt parison leaving the machine head must be cooled and solidified to transmit the traction force and be formed into a PE pipe. In order to make the pipe have the correct geometry, size and perfect surface smoothness, a sizing device must be used. There are two methods for PE pipe sizing: inner diameter setting method and outer diameter setting method. The so-called inner diameter sizing method is that the sizing device controls the inner diameter size and roundness of the PE pipe, so that the melt tube is wrapped tightly on the outer surface of the sizing and hardened.
The outer diameter setting method is to control the outer diameter size and roundness of the pipe by the sizing device. As ISO standards, European standards and my country's national standards establish PE pipe specifications based on the outer diameter, in general, the pe water supply pipe production line adopts the outer diameter shaping process, and the inner diameter shaping is only used for some special situations. The outer diameter shaping process can usually be divided into two categories: pressure shaping and vacuum shaping.
Compared with pressure setting. The vacuum outer diameter shaping has the following points:
1. The guide tube is simple and fast, with less waste;
2. The air flows freely in the PE pipe during vacuum setting; the inner wall of the pipe has a good cooling effect;
3. It can better control the dimensional tolerance;
4. The tube blank is in a plasticized state at the exit of the die, and there is almost no deformation;
5. The internal stress of PE pipe is small;
6. There is no danger of being torn by the screw plug;
7. The production will not be stopped due to the wear of the screw plug;
8. The die of the machine head and the vacuum setting device are separated, because the temperature can be controlled separately.
Tianxintai takes you to understand what is the core composition of the PE water supply pipe production line
What is a sizing sleeve? PE pipe special sizing failure, sizing failure is a common sizing element. The sizing sleeve is tubular and is made of brass, copper-beryllium alloy or aluminum. Although aluminum has good heat transfer performance, it is easily damaged. Some sizing sleeves are made by first making many rings with sheet material or fast material, and then forming a tube, but most sizing sleeves are made of tubular materials.
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