PVC twisted pipe production process

Abstract

The invention discloses a process of the PVC winding pipe. It includes: 1. extruding the PVC material to form the PVC plate; 2. winding the PVC plate to PVC pipe. In the process two, one or the both of the PVC plate and the PVC pipe is heated at the same time. So the heating process can eliminate the pipe stress, so the PVC pipe can be used widely.

Description

technical field [0001] The invention relates to a production process of a PVC winding pipe. Background technique [0002] PVC material has good physical and chemical properties. Since the early 1980s, the country has vigorously promoted the application of UPVC pipes, formulated a series of policies, systems, and standards, and accumulated a lot of experience. Developed to today, it already has perfect product standards, testing method standards and testing methods, construction engineering technical specifications, etc., thus unifying product specifications, sizes and quality indicators, and realizing product interchangeability. This shows that the development of PVC water supply and drainage pipes has entered a mature stage, and the product quality and construction quality are guaranteed, thus ensuring the use effect of PVC water supply and drainage pipes. [0003] Water supply and drainage pipes made of PVC materials have many advantages, and are widely used in municipal...

AI Technical Summary

Problems solved by technology

The ring stiffness design values ​​of these two diameter pipes are both greater than 9KN / m 2 , but the actual ring stiffness of the produced pipe is only 5KN / m 2 Around, far away from the design requirements, the design loss rate is close to 50%

There are also attempts to put image 3 The material in the structure shown in -2 is thickened, and its theoretical data can be increased to S=12.5KN / m 2 , but the actual data is still only S=5.59KN / m 2

From the above data, it can be seen that the same structure, the loss rate is basically the same, and the ring stiffness of the thickened plate structure will definitely increase a lot in theory, but contrary to expectations, it can only increase a little, which shows that it is not a structural problem. , but there are other irresistible factors

Although many improvements have been made in the industry, the ring stiffness of PVC winding pipe still cannot break through 8KN / m 2 Even higher ring stiffness mark, so the bottleneck of this technology has been seriously restricting the popularization and application of PVC winding pipe

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