Air hole prevention production technique for colored PE pipe

Abstract

The invention relates to an air hole prevention production technique for a colored PE pipe. The air hole prevention production technique for the colored PE pipe comprises the following steps that materials are heated, stirred and mixed, heating and dehumidification are conducted, the pipe is extruded, and the pipe is subjected to vacuum calibration, cooling and traction cutting; according to the technique, before the production of the PE pipe, the steps of heating and stirring, and heating and dehumidification are added, so that the air hole problem caused by humid material during colored PE material production is well solved, and mechanized material feeding is achieved. The invention further provides the key parameters such as temperature and pressure of every process during air hole prevention production, and particularly, a plastic embedded extrusion mould and a spray type calibration sleeve are applied, so that the produced colored PE pipe can be uniform in texture, free of air holes, high in dimensional precision, smooth in pipe wall and good in appearance visual effect.

Description

technical field [0001] The invention belongs to the technical field of plastic pipe production, and in particular relates to a production process for preventing pores of colored PE pipes. Background technique [0002] PVC pipes have been used in urban water supply pipelines for more than 50 years in foreign countries, and the consumption is relatively large. However, in recent years, its development speed has shown a downward trend. In contrast, the application of PE water supply pipes is rapidly rising, which is due to the superior performance of PE materials on the one hand, and its environmental protection and hygienic performance on the other hand. Not only that, but its application field has expanded to many fields such as urban water supply, urban gas supply, farmland irrigation, seawater desalination, vehicle and ship pipelines, etc. In the prior art, the method usually used in the production of colored PE pipes is: after mixing and stirring white material-polyethyl...

AI Technical Summary

Problems solved by technology

In the prior art, the method usually used in the production of colored PE pipes is: after mixing and stirring white material-polyethylene and color masterbatch, it is directly used in the production and preparation of PE pipes. The existing problem is: polyethylene It is a non-polar structure, and its hygroscopicity is very small. However, because it is a non-conductor, the obtained particles are prone to static electricity during storage and transportation, especially in the atmosphere, and absorb moisture in the air, resulting in excessive moisture content.

The PE pipes produced by direct mixing of such raw materials are likely to affect the quality of the pipes due to the generation of air holes during the extrusion of the pipes, and in severe cases, the pipes may be scrapped.

At present, the extrusion dies used for extruding pipes are basically made of metal materials, which makes the stability of PE pipes poor during extrusion. In addition, the smoothness of the pipe wall is limited, which will cause inconvenience to the construction of pipes to a certain extent. , and also affect the visual appearance of PE pipes

In addition, in the sizing cooling process of the pipe, due to insufficient cooling, the sizing cooling effect is not good, or the quality of the PE pipe is seriously affected due to the blockage of the sizing water cooling pipe, which is also worthy of great attention in the production process. question

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