Production method of plastic-based paper composite pipe

Abstract

The invention discloses a production method of a plastic-based paper composite pipe and in particular relates to a composite pipe which is formed by spraying on a metal core rod and taking a piece of paper as a filler. The production method of the plastic-based paper composite pipe comprises the following steps: spraying heated liquefied plastic on a rotary mandril mould to form a pipeline inner cavity, spraying heated liquefied plastic on the outer wall of the pipeline inner cavity and forming a plastic and paper adherend by virtue of a porous paper tape at the same time, and spraying heated liquefied plastic on the outer wall of the plastic and paper adherend to form a pipeline outer wall. The plastic-based paper composite pipe is low in cost, high in strength and resistant to corrosion, takes plastic as a base material and the paper as the filler, adopts parts universal with the existing plastic pipe fitting, can be applied to occasions of construction water, farm irrigation, outdoor cable threading, gas and liquid delivery and the like and has high practicability.

Description

[0001] This invention is a divisional application of the invention patent "a plastic-based paper composite pipe". The application date of the original application is May 17, 2013. Plastic-based paper composite tube". technical field [0002] The invention relates to a production method of a plastic-based paper composite pipe, in particular to a production method of a composite pipe sprayed on a metal mandrel with paper as a filler. Background technique [0003] The pipes commonly used in pipeline installation projects are seamless steel pipes, black iron pipes, galvanized steel pipes, steel-plastic pipes, steel porcelain pipes, aluminum-plastic pipes, PVC pipes, PPR pipes, PE pipes, rubber pipes, rubber composite pipes, etc. If it is used in construction water, farmland irrigation, outdoor cable threading and other occasions, the cost of all the above pipes will be relatively high if they meet the construction requirements. [0004] After searching the patent literature, th...

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Problems solved by technology

[0004] After searching the patent literature, the search results obtained the name "pipe skeleton reinforced plastic composite pipe and its production process" (application number: 201210147340.8) and the name "pipe skeleton plastic composite pipe and its production process" (application number: 201210146826.X) The above two application documents must prefabricate the internal pressure tube, use steel wire or glass fiber wire as the reinforcement net, and the steel wire or glass fiber wire is easy to knot and wind when winding at high speed, and glue is used as the adhesive. It is long and the glue is prone to residual harmful substances and harmful volatile gases. When making the outer cladding, the pipe must be loaded into the extruder for processing, resulting in complicated process, increased production cost and low production efficiency.

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