Three-layer co-extrusion sandwiched honeycomb pipe and production technology thereof

Abstract

The invention belongs to the technical field of plastic pipes, and relates to a three-layer co-extrusion sandwiched honeycomb pipe and a production technology thereof. An inner-layer pipe, a sandwiched layer and an outer-layer pipe of the three-layer co-extrusion sandwiched honeycomb pipe are of an integrated structure which is formed through one-time extrusion of plastic materials. The pipe wall of the inner-layer pipe and the pipe wall of the outer-layer pipe are of a solid structure, and the sandwiched layer is a honeycomb structure layer. According to the production technology, the plastic in a fusion state is subjected to one-time extrusion to form the sandwiched pipe with the inner-layer pipe, the sandwiched layer and the outer-layer pipe through three extrusion die runners of one injection molding extruder; and the pipe wall of the inner-layer pipe and the pipe wall of the outer-layer pipe are of the solid structure, and the sandwiched layer is the honeycomb structure layer. The three-layer co-extrusion sandwiched honeycomb pipe and the production technology thereof have the beneficial effects that the honeycomb structure layer is adopted as the sandwiched layer, the inner surface and the outer surface of the honeycomb structure layer, the outer surface of the inner-layer pipe and the inner surface of the outer-layer pipe are fused into the integrated structure through the temperature and stickiness during injection molding extrusion, and bonding or welding is not needed; and the overall weight is small, the inner surface and the outer surface are smooth, the overall performance is high, and the three-layer co-extrusion sandwiched honeycomb pipe and the production technology thereof are suitable for pipelines or guide pipes with the high performance requirement.

Description

technical field [0001] The invention belongs to the technical field of plastic pipes, in particular to a three-layer co-extruded sandwich honeycomb pipe and its production process. Background technique [0002] At present, there are many kinds of plastic pipes used in the market, for example: one type is plastic double-wall corrugated pipe: Features: smooth inner wall, concave-convex outer wall, outer wall is continuously formed by a moving concave-convex joint module, soft and easy to bend in the axial direction, and the connection is sealed Easy, the radial ring rigidity is sufficient, but the axial rigidity is low, and the cost of production equipment is high; the second type is plastic double-layer axial hollow wall pipe: features: the inner and outer walls are smooth, the axial hollow runs through the whole pipe, and the axial rigidity is sufficient , the connection and sealing are easy, but the radial ring rigidity is low, and the environmental stress cracking resistan...

AI Technical Summary

Problems solved by technology

[0002] At present, there are many kinds of plastic pipes used in the market, for example: one type is plastic double-wall corrugated pipe: Features: smooth inner wall, concave-convex outer wall, outer wall is continuously formed by a moving concave-convex joint module, soft and easy to bend in the axial direction, and the connection is sealed Easy, the radial ring rigidity is sufficient, but the axial rigidity is low, and the cost of production equipment is high; the second type is plastic double-layer axial hollow wall pipe: features: the inner and outer walls are smooth, the axial hollow runs through the whole pipe, and the axial rigidity is sufficient , the connection and sealing are easy, but the radial ring rigidity is low, and the environmental stress cracking resistance is low; the third type is plastic winding reinforced pipe: features: the inner wall is flat, the outer wall has spiral ribs, and the pipe body is continuously wound by a certain width extrusion tape Welding or bonding molding, the axial direction is soft and easy to bend, the connection is easy to seal, the radial ring rigidity is sufficient, but the axial rigidity is low, and the cost of production equipment is high; there are also plastic winding structural wall pipes, steel belt reinforced plastic spiral corrugated pipes, etc. ; These pipes have the disadvantages of low axial stiffness or low radial ring stiffness, as well as defects such as the outer wall is not smooth enough, and the cost of production equipment is high

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