Manufacturing method of HDPE double-layer trapezoidal rib winding pipe

Abstract

The invention provides a manufacturing method of an HDPE double-layer trapezoidal rib winding pipe. According to the first scheme, as for an HDPE double-layer single-hole trapezoidal rib winding pipe, the manufacturing method comprises the steps that (1) a single-hole PP corrugated pipe with an isosceles trapezoid-shaped cross section is continuously produced; (2) the single-hole PP corrugated pipe passes through a coating mold, the coating mold extrudes an HDPE melt to coat the single-hole PP corrugated pipe, and an HDPE single-hole trapezoidal rib strip is formed; (3) the HDPE single-hole trapezoidal rib strip is pulled to a hot-state barrel mold to be synchronously wound with an HDPE bottom strip, specifically, the bottom strip and the lower edge of the single-hole trapezoidal rib strip are heated and pressed, and an HDPE trapezoidal rib winding pipe body and bell and spigot joints at the two ends of the HDPE trapezoidal rib winding pipe body are integrally formed; and (4) the formed HDPE single-hole trapezoidal rib is wound on the pipe body, and then stacking and winding are carried out; and the second layer of HDPE single-hole trapezoidal rib strip and the HDPE bottom strip are synchronously wound, so that the cross sections of the upper and lower layers of rib pipes are arranged in a shape like a Chinese character 'pin'. According to the second scheme, as for an HDPE double-layer double-hole trapezoidal rib winding pipe is manufactured. By means of the manufacturing method, the DN1600-DN3000 large-diameter plastic drainage pipe can meet the requirement for high ring stiffness.

Description

technical field [0001] The invention relates to a manufacturing method of an HDPE double-layer trapezoidal rib wound pipe. Background technique [0002] The existing plastic drainage pipes are limited in manufacturing process and cost, so that they are rarely used in large-diameter plastic drainage pipes (DN2000-4000). Traditionally, cement pipes and ductile iron pipes are mainly used; this traditional product is not environmentally friendly. Type products, which will involve pollution; also due to their own product defects, the pipeline is easy to block, and because of its heavy weight, construction is difficult; because of its high requirements for pipe base treatment, large-diameter cement pipes or ductile iron pipes also need to be installed during construction. Do pipe pier connection, these have increased the construction cost. Contents of the invention [0003] The object of the present invention is to provide a manufacturing method of HDPE double-layer trapezoidal...

AI Technical Summary

Problems solved by technology

[0002] The existing plastic drainage pipes are limited in manufacturing process and cost, so that they are rarely used in large-diameter plastic drainage pipes (DN2000-4000). Traditionally, cement pipes and ductile iron pipes are mainly used; this traditional product is not environmentally friendly. type products, which will involve pollution; also due to its own product defects, the pipeline is easy to block, and because of its heavy weight, construction is difficult; because of its high requirements for pipe base treatment, large-diameter cement pipes or ductile iron pipes also need to be installed during construction. Do pipe pier connection, these have increased the construction cost

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