Thus, in 2008 the production of PEX pipes in U.S was one of the most rapidly developing industries. No less impressive figures demonstrate and foreign manufacturers of pipes.
The main method of production is extrusion of pipes. Leading manufacturers of pipes using different compositions of materials in the production of pipes made of plastic. For example, polyethylene and polypropylene pipes are made to include in their composition of granular compositions of polymers, and the production of PVC pipes is introduced in the special resin PVC, various stabilizers and fillers.
Production of plastic pipes
The very production of pipes made of plastic and polymeric materials is as follows: the polymer composition is fed to the single screw or twin-screw (depending on the type of manufactured pipes) extruder, which lend themselves melted and homogenizing, and then extruded through a tubing head.
Tube Manufacturing
Thus, production of billets for further processing, which then pass through a calibrating device and vacuum tanks for shaping.
After this, ready-made plastic pipes are cooled in a water bath.
The last stage in the production of pipes is cutting the finished product to the required length segments or winding it in the bay.
This technique can produce tubes of cross-linked polyethylene, which use almost all manufacturers of pipes, both U.S and foreign:
* DOS-a – Ram-extrusion method is used for the production of pipes made of polyethylene, crosslinked peroxide method.
* TEC-b – used when using polyethylene, cross-linked by silanonov. Is carried out by continuous extrusion, where the production line is equipped with additional dosing pipes and taps for catalysts and silanonov.
* DOS-C – the production of pipes made of polyethylene, cross-linked electron beam. The method includes two stages: first – the production of pipes by continuous extrusion, the second – joining of tubes obtained by electron accelerators special.
Source: http://www.plasticpipe.org/
