Device for manufacturing double-flat-wall helical hollow wall pipe

Abstract

The invention discloses a device for manufacturing a double-flat-wall helical hollow wall pipe. The device comprises an extrusion machine and a machine head connected with the extrusion machine, wherein the machine head is connected with a vacuum water inlet groove, a spraying cooling groove, a multi-crawler tractor, a cutting saw and a pipe turning frame in sequence in a processing direction of a production line and is in a hollow structure; the hollow part forms a flow channel; the machine head comprises a machine head body, a die head and a machine neck connected with the extrusion machine; a flow distribution cone is arranged in the machine head body; a cone head of the flow distribution cone faces to the extrusion machine; a core rod is arranged at an outlet of the die head; hollow core shafts with the number the same as that of helical holes are arranged between the core rod and the flow distribution cone; a drive mechanism for driving the core rod to rotate is arranged on the machine head body. The device has the advantages that the structured wall pipe produced by the production line is good in comprehensive mechanical performances such as impact resistance, ring stiffness and axial flexibility, is excellent in process performance, and can be suitable for wide-range large-area popularization and application.

Description

technical field [0001] The invention relates to the technical field of extrusion of plastic pipes, in particular to a manufacturing device for double-flat-wall spiral hollow wall pipes. Background technique [0002] Existing large-diameter plastic pipes for sewage or rainwater are buried pipes. Due to the need to withstand external pressure, the pipe needs to be designed as a structural wall pipe with increased ring stiffness. The existing structural wall pipes at home and abroad include double-wall corrugated pipes, UPVC ribbed pipes, and axial hollow grid pipes formed by one-time extrusion; there are large-diameter winding pipes formed by secondary extrusion and other types of winding pipes. The best-selling products on the market are double-wall corrugated pipes and their manufacturing equipment. Because the double-wall bellows uses less material when the ring stiffness is the same, but the manufacturing equipment of this product is expensive, which is not conducive to ...

AI Technical Summary

Problems solved by technology

Some structural wall tubes have good ring stiffness and axial flexibility, but most of them are produced by winding method, and the process is more complicated

The axial hollow area (axial porous) structure of some structural wall tubes improves its axial rigidity, and can be produced on a standard extrusion production line with good manufacturability, but its axial flexibility and ring stiffness decrease

In other structures, the radial space (radial porous) structure of the wall pipe improves its ring stiffness and axial flexibility, but its impact resistance is slightly reduced, and it must be produced by winding. The process is more complicated

Images