Coextruding heat winding structure wall pipe, processing method and method

Abstract

The present invention provides a kind of hot wound and extruded pipe and its production process and forming mold, and the new product with low material consumption and high annular rigidity is produced based on equivalent wall thickness principle. The hot wound and extruded pipe is produced through hot screw winding plastic belt onto mold core and extruding to coat with the same kind of material. The present invention can produce co-extruded polyethylene pp pipe and polyethylene coated polypropylene single wall corrugated pipe with high strength and capable of being used as the reinforcing pipe for great caliber pipe. The present invention has high production efficiency.

Description

technical field [0001] The invention relates to a co-extruded heat-wound structural wall pipe, a processing method and a mold, and belongs to the technical field of plastic pipe processing technology and equipment. Background technique [0002] At present, large-diameter plastic pipes belong to chemical building materials. They are replacement products of plastics for steel and plastics for cement. They are used in municipal drainage, long-distance low-pressure water delivery, mine and chemical drainage, farmland water conservancy irrigation and ventilation pipes and chemical containers. It is of great significance to save energy, reduce pollution and protect the environment. At present, the production of this kind of plastic pipe generally adopts a single machine (one extruder) production method, and the plastic pipe used as a winding skeleton is produced by extruding a U-shaped arc belt from a mold and wrapping a polypropylene plastic pipe (referred to as pp pipe). , thro...

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Problems solved by technology

At present, the production of this kind of plastic pipe generally adopts a single machine (one extruder) production method, and the plastic pipe used as a winding skeleton is produced by extruding a U-shaped arc belt from a mold and wrapping a polypropylene plastic pipe (referred to as pp pipe). , through online winding on the pipe with polyethylene flat belt as the base layer as a reinforcing rib, the pipe produced in this way has the following defects: 1. Sometimes polyethylene cannot completely cover the pp pipe, resulting in exposure and reducing the ring stiffness of the product. To ensure the quality of its products, the flat belt winding base layer is often designed to be very thick; 2. The diameter of the coated pp pipe should not be too large, the maximum is 54 mm, and the size of the skeleton is limited, which affects the product ring stiffness; 3. The requirements for polyethylene materials and the base layer Same, high production cost

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