First, the impact of PE pipe quality factors
1, the choice of raw material factors: PE raw material specifications of a wide variety of grades, countless, the same brand of raw materials can produce PE corrugated pipe but can not produce PE to the water pipe. Here or the manufacturers themselves need to go to a lot of tests, choose their own production of pipe material.
2, the impact of temperature on the quality of PE pipe: the temperature is the impact of plastic and plastic pipe production of the main reasons, the temperature is too low, plasticization is not good, the temperature is too high, easy decomposition of materials. Temperature control should be based on the original formula, extruder and head structure, screw speed and other factors to determine. Processing hard pvc pipe, the processing temperature and decomposition temperature is quite close to the production should be strictly controlled at all points of the material temperature. At the same time pay attention to the temperature measurement instrument error and the location of the measurement point.
3, screw speed on the quality of the pipe: the choice of screw speed directly affect the yield and quality. The screw speed depends both on the size of the extruder and depends on the size of the pipe. The increase of the rotational speed, the increase of the extrusion amount and the large shearing force of the material are helpful to the plasticization of the material, but the residence time of the material in the screw is short, the high friction heat makes the inner wall of the tube more rough, Therefore, the screw speed control should be based on yield, product appearance and physical and mechanical performance requirements of a comprehensive trade-off.
4, the impact of traction speed on the quality of PE pipe: traction speed directly affect the product wall thickness. The traction speed should be in accordance with the extrusion speed, usually traction speed than the pipe extrusion speed 1% to 10%.
5, the impact of vacuum on the quality of the pipe: negative vacuum tube shape and maintain a certain roundness. Its pressure is generally 0.02 ~ 0.05mpa
6, traction cooling on the quality of the pipe: cooling can not reach the extrusion material adhesion, can not be stereotypes. It is best to use air-cooled water cooling.
Second, PE common quality reasons and treatment methods
Third, PE common quality picture (for your reference)
1. There are two kinds of surface pimple, die out is good, by cleaning the spray with a long time production, the outer wall becomes better. The second is also a die out there are surface pitting, that is, equipment caused by poor plastic.
2, P6006 wall numb, is the time to stop too long, the production rate of 0.8CM, the temperature is not enough to cause, slow down to better
3, PE 110 SDR17 pipe water shower
4, PE pipe wall is the core mold temperature is too low caused by the inner wall of the needle-like, but also straight stripes, production for some time, such as core mold temperature rise like
5, PE pipe wall is the core temperature is too high caused by the inner wall into a mesh, and concave more obvious, through the internal blow to solve
6, the outer wall of light classes plus rugged, mainly set in front of a set of water without water, pipe heat,
7, PE 110 SDR17 pipe water ring less water
8, the water is too high caused by the apparent phenomenon
In short, PE surface problems have a great change, we need to explore together. If you have a good suggestion you can leave a message.
