Production method for steel-plastic warping and soldering pipe

Abstract

The invention relates to a production method for steel-plastic warping and soldering pipes. The production method for the steel-plastic warping and soldering pipes is formed by the following steps of (1) preprocessing steel belts; (2) coating a layer of hot melt adhesive on the surface of every preprocessed steel belt under high pressure; (3) pressing a reinforced rib groove longitudinally on every adhesive coated steel belt; (4) heating the surface of every steel belt which is provided with the hot melt adhesive and the rib groove, performing high pressure plastic coating and cooling and forming after vacuumization; (5) curling the steel belts which are performed plastic coating into steel-plastic warping and soldering pipes in different diameter a through a curving forming machine; (6) removing the hot melt adhesive and the plastic at edges of adjacent steel belts during curling; (7) performing continuous welding at the edges of the adjacent steel belts; (8) coating the layer of hot melt adhesive on the inner sides and the outer sides of welding joints at the continuous welding positions and coating a layer of plastic outside the hot melt adhesive; (9) cooling the plastic on the inner side and the outer side of the welding joints. The production method for the steel-plastic warping and soldering pipes has the advantages of being firm in steel-plastic combining and not easy to delaminate; greatly enhancing the ring stiffness (radial resistant pressure) and axial tension resistant capability and overcoming the problems that the plastic is easy to leak, desolder and crack during utilization.

Description

technical field [0001] The invention relates to a structural wall plastic pipe, in particular to a manufacturing method of a steel-plastic winding welded pipe. Background technique [0002] Steel-plastic winding pipe has the advantages of high strength, low cost, and not easy to corrode. It has been widely used in drainage and sewage discharge in recent years. Press the grooves longitudinally, then spirally wind the steel strip pressed into the grooves, and coat it with plastic to shape it while winding; The special-shaped strips with metal ribs are wound into steel-plastic winding pipes; these two types of pipes have the following disadvantages: 1. Since the steel strips, that is, the metal reinforcing ribs are connected by pure plastic without any reinforcement, they cannot withstand large Pressure; 2. Because there is no welding between the steel strips, only plastic bonding, and the joints are long, the reliability of the connection is difficult to control and measure, ...

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Problems solved by technology

[0002] Steel-plastic winding pipe has the advantages of high strength, low cost, and not easy to corrode. It has been widely used in drainage and sewage discharge in recent years. Press it into grooves longitudinally, then spirally wind the steel strip pressed into grooves, and coat it with plastic to shape it while winding; the other is to use metal strips and plastics to make shaped strips with metal ribs, The special-shaped strips with metal ribs are wound into steel-plastic winding pipes; these two types of pipes have the following disadvantages: 1. Since the steel strips, that is, the metal reinforcing ribs are connected by pure plastic without any reinforcement, they cannot withstand large Pressure; 2. Since there is no welding between the steel strips, only plastic bonding, and the joints are long, the reliability of the connection is difficult to control and measure. The axial tensile strength of the pipe is relatively low, and it is easy to leak during use; 3. The strong torsional stress of the steel belt makes the steel belt and plastic easy to delaminate, and cracks appear on the surface of the pipe

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