KR20020004114A - Synthetic resin pipe - Google Patents

Abstract

PURPOSE: A synthetic resin pipe is provided to increase external force strength and internal force stress by forming molecular structure overlapped in the spiral thread winding and to reduce the thickness of a pipe. CONSTITUTION: A pipe is divided into three portions. An outer portion of a pipe is extruded in linear molecular structure and thread-wound in a left direction(12) during extrusion. An inner portion of the pipe is extruded in linear molecular structure in a right direction(13) by thread winding. An internal layer of the pipe is extruded lengthwise. The internal layer is a shock absorbing layer(14). When extruding a material for a pipe, rotation of a dice is guided.

Description

Plastic Pipes {.}

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to synthetic resin pipes, and conventional pipes (hereinafter referred to as pipes) have been widely used mainly as water pipes, pressure pipes, and gas pipes. However, since synthetic resin products have a linear structure in the extrusion process, the extrusion direction has a very high tensile strength, but the width direction is relatively low, which is problematic in terms of durability and external pressure strength.

In order to solve the above problem, there has been provided a product which rotates the extrusion direction in a spiral winding in one direction, but in order to provide a higher external pressure strength, the inner and outer resin layers each have a molecular structure of spiral winding circuits in the left and right directions. This is to form.

1 is a partially cut away perspective view of the present invention

2 is a cross-sectional view of FIG.

3 is a partially cut away perspective view of the embodiment of FIG.

4 is a partially cut away perspective view of an embodiment of the present invention;

5 is a perspective view of principal parts of the molding process of FIG.

6 is a cross-sectional view of main parts of FIGS. 4 and 5;

[Description of Major Symbols in Drawing]

11. Pipe 12. Left direction layer 13. Right direction layer

14. Buffer layer 15,25. Reinforcement belt 16,26. Fusion

18,28 fusion zone

In general, the thickness is maintained to some extent for the rigidity and strength of the pipe in the medium diameter. In the present invention, the outer part is spiral wound while extruding the linear molecular structure in the left direction by dividing the pipe thickness by three to the left direction layer 12. The inner part is spiral wound while extruding the linear molecular structure in the opposite direction to the outer part, that is, to the right direction, so as to the right direction layer 13, while the middle layer is a three-layer structure as the buffer layer 14 which extrudes in the longitudinal direction as in the prior art. The product of the present invention is provided by integrating the die by the extrusion force when extruding the pipe raw material of the original extruder as an integral product.

In addition, as shown in FIG. 3, the pipe 11 is divided into two thicknesses so that the outer portion is formed as the left layer 12 and the inner portion is integrated as the right layer 13 as shown in FIG. Provided in the invention.

4 and 5, the inner and outer resin layers spirally wound in the left and right directions in the product of the present invention are fused to a plurality of reinforcing resin belts 15 and both edges thereof. The resin layer side in the upper portion of the resin layer was formed by integrating the fusion zones 26 at both edge portions of the plurality of reinforcing resin belts 25 spirally wound to the right to integrate the right-side fusion zone 28 with each other. However, the fusion zone 16 of both side edge portions of the plurality of reinforcing resin belts 15 spirally wound to the left side in the resin layer 13 on the outer surface is integrated with each other to form a left fusion zone 18 to form a mesh. To provide a reinforced plastic pipe structure.

The present invention provides a rich structure superimposed on the spiral winding in the left and right directions according to the extrusion direction of the pipe 11, not only to provide an excellent effect on the external pressure strength, pressure resistance and freezing, but also the thickness of the conventional pipe (thick It is a useful product that provides economics by forming conditions that can reduce).

Claims (3)

In the pipe made of synthetic resin, the thickness (thickness) is divided into three, but the linear structure is composed of the spiral structure of the linear structure of the outer part of the left direction layer 12 and the inner part of the right direction layer 13 in a spiral winding. 14) Pipe made of synthetic resin The synthetic resin pipe according to claim 1, wherein the left direction layer 12 is formed on the outside and the right direction layer 13 is formed on the inside. The synthetic resin pipe according to claim 1 or 2, wherein the reinforcing resin belts (15, 25) spirally wound in the left and right directions are integrally formed by the fusion zone (16, 26).