A plastic-coated tape-reinforced hollow-wall winding pipe and its manufacturing method

Abstract

The invention discloses a plastic covered belt reinforced hollow-wall wound pipe and a manufacturing method thereof. The plastic covered belt reinforced hollow-wall wound pipe comprises a square pipe, molten glue and a plastic covered belt. The plastic covered belt is longitudinal placed on one side face or two sides of the square pipe to form the plastic covered belt reinforced square pipe. The plastic covered belt reinforced square pipe is arranged on a roller mold to be spirally wound, the molten glue in a molten state is extruded to bond gaps, and therefore the plastic covered belt reinforced hollow-wall wound pipe is formed. The manufacturing method of the plastic covered belt reinforced hollow-wall wound pipe mainly comprises the steps of extruding shaping of the square pipe, attaching of the plastic covered reinforcement belt and winding forming. The plastic covered belt reinforced hollow-wall wound pipe is simple in structure, low in weight per meter and simple in production process, and has the characteristics of saving energy and being environmentally friendly.

Description

Technical field [0001] The invention relates to a pipe material, in particular to a hollow wall wound pipe reinforced with a plastic coating tape and a manufacturing method thereof. Background technique [0002] Hollow wall winding pipe is a kind of structural wall pipe made of high-density polyethylene (HDPE) by hot winding molding process. The pipe is a new type of acid-resistant, anti-corrosion, pressure-resistant, and non-toxic green environmental protection pipe. It is an environmentally friendly and energy-saving high-tech product. It is the most ideal replacement product for cement pipes, cast iron pipes, glass pipes, PVC-U corrugated pipes, etc. HDPE is a high-molecular polymer, which makes the hollow wall wound pipe have good flexibility and overall resistance to external pressure, and can ensure safe passage when used on roads with heavy loads. Due to the flexibility of the pipes, when geological activities such as earthquakes and uneven ground settlement occur, the pi...

AI Technical Summary

Problems solved by technology

In recent years, with the large demand for hollow winding pipes, and in order to overcome some previous technical defects, there have been many improvements aimed at these technical defects. For example, the Chinese patent application number 200610021292.2 discloses a HDPE, PVC plastic composite The winding pipe is composed of a rectangular hollow strip and HDPE plastic filler. The pipe wall of the rectangular hollow strip is a PVC plastic layer, a composite glue bonding layer and an HDPE plastic layer from the inside to the outside. It adopts a multi-layer complex The structure may have good performance, but the difficulty of production and processing will inevitably increase, and the multi-layer complex structure is not conducive to ensuring production quality

Another example is that the Chinese patent application number 201210192872.3 discloses a glass fiber reinforced HDPE double-wall winding pipe, which is formed by winding a hollow square pipe extruded after mixing HDPE raw materials and long glass fibers. It is difficult to ensure the uniformity of the mixing of fibers and plastics, and the smoothness of the tube wall will inevitably be affected during extrusion

Another example is the Chinese patent application number 201310001048.X which discloses a glass fiber reinforced hollow-walled polyethylene winding pipe, which is formed by winding a hollow square pipe, but at least one PP / PE composite bag is wound synchronously during hot-melt adhesive welding. Covered with long glass fiber bundles; it is difficult to ensure that the reinforced glass fiber has a reinforcing effect when it is set in the hot melt adhesive, and it cannot enhance the ring stiffness of the hollow square tube

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