Plastic Pipe Machine
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Plastic Pipe Machine

Plastic Pipe Machine

How to solve the problems encountered in the production of PPR pipes?

How to solve the problems encountered in the production of PPR pipes? PPR pipe production line The PP-R drinking water pipe system is a new product commonly used in developed countries in the world today. It uses homogenous welding technology in the cold and hot water transportation project. Its comprehensive technical performance and economic indicators are far superior to other similar products, especially it Excellent hygienic performance, the entire process from production and use to waste recycling can meet extremely high hygiene and environmental protection requirements. Products have the advantages of heat resistance, pressure resistance, heat preservation and energy saving, long service life and economy, which are commonly used in today's developed countries New product PPR pipe production process Raw material + color masterbatch → mixing → vacuum feeding → raw material drying → single screw extruder → color line extruder → spiral mold → sizing sleeve → spray vacuum setting box → spray cooling water tank → inkjet printer → Crawler tractor → finished product inspection and packaging PPR pipe production line. How to solve the problems encountered in the production of PPR pipes? 1. There are burn marks on the surface of the tube. The possible cause is that the temperature of the body or the nose is too high; the nose and filter are not cleaned; there are impurities in the pellets; the thermal stability of the raw materials is poor or the thermal stability dose is too small; the temperature control instrument fails. 2. There are black stripes on the surface of the pipe. The possible cause is that the temperature of the machine head is too high and the filter is not cleaned. 3. The surface of the pipe is dull. The temperature of the die may be too low or too high. 4. There are wrinkles on the pipe surface. It may be caused by uneven temperature around the die; the cooling water is too hot; the traction is too slow. 5. The inner wall of the pipe is rough. It may be that the temperature of the core rod is too low; the temperature of the body is too low; the temperature of the screw is too high. 6. There are cracks on the inner wall of the pipe. The material may be impurity; the temperature of the core rod is too low; the temperature of the body is low; the traction speed is too fast. 7. There are unevenness on the inner wall of the tube. The temperature of the screw may be too high; the screw speed is too fast. 8. There are bubbles on the inner wall of the tube. It may be expected to be damp. 9. Uneven tube wall thickness. The die and core die may not be aligned; the temperature of the head is uneven; the traction is unstable; the compressed air is unstable. 10. The pipe is bent. The wall thickness of the pipe may be uneven; the temperature around the machine head is uneven; the cooling groove of the machine head is not aligned with the traction cutting center; the holes at both ends of the cooling groove are not concentric. 11. The product is brittle. The degree of plasticization of the machine may not be enough; the screw speed is too fast; the temperature of the machine head is too low; the resin viscosity is too high. 12. Longitudinal or transverse shrinkage of the pipe may be large (transverse); the traction speed is relatively high (longitudinal). 13. Suddenly the material is discharged slowly. The temperature of the screw feeding section may be high; the machine body enters water; the melt pressure of the machine head is small.

Types of plastic pipes

Types of plastic pipes  1) Rigid polyvinyl chloride (UPVC) pipe UPVC pipe has high impact resistance and chemical resistance. It can be added with different additives during processing according to different requirements to make it have physical and chemical properties that meet different requirements. UPVC pipes are divided into spiral muffler pipes, core foam pipes, radially stiffened pipes, spirally wound pipes, double-wall corrugated pipes, and single-wall corrugated pipes according to different structures. UPVC pipes are mainly used for urban water supply, urban drainage, building water supply and building drainage pipes, and are also widely used for water-saving irrigation pipes. 2) Chlorinated polyvinyl chloride (CPVC) pipe UPVC pipe is a kind of plastic pipe processed by perchlorovinyl resin. It has good heat resistance, aging resistance and chemical corrosion resistance. It is mostly used as hot water pipe, waste liquid pipe and sewage pipe in foreign countries, and it is mostly used in power cable sheath in China. 3) Polyethylene (PE) pipe PE pipes are divided into high-density polyethylene pipes (HDPE), medium-density polyethylene pipes (active MDPE) and low-density polyethylene pipes (LDPE) according to their different densities. HDPE pipes have high strength and rigidity; MDPE pipes have In addition to the compressive strength of HDPE pipe, it also has good flexibility and creep resistance; LDPE pipe has good flexibility, elongation, and impact resistance, especially good chemical resistance and high frequency insulation. In foreign countries, HDPE pipes and MDPE pipes are widely used as urban gas pipelines and water-saving irrigation pipelines, and a small amount are used as urban water supply pipelines. 4) Cross-linked polyethylene (PE-X) pipe Cross-linked polyethylene is to change the plane chain structure of polyethylene molecules into a three-dimensional network structure through chemical or physical methods, so that it has excellent physical and chemical properties. PEX pipes are mainly used for indoor cold and hot water supply and ground radiant heating. 5) Type III polypropylene (PP-R) pipe Type III polypropylene is the third generation of modified polypropylene, that is, the gas phase copolymerization method is used to randomly and uniformly polymerize PE in the PP molecular chain, so that it has better impact resistance, temperature resistance and creep resistance. PPR pipes are mainly used for farmland irrigation. 6) Polybutene (PB) tube Polybutene tube has unique creep resistance, can withstand high load for a long time without deformation, is chemically stable, and can be used safely at -20 95 ℃. Mainly used in tap water, hot water and heating pipes, but due to the small supply and high price of PB resin, it is difficult to mass produce and apply in China. 7) Engineering plastic (ABS) tube ABS is a terpolymer of acrylonitrile, butadiene and styrene. It has high impact strength and surface hardness. It can still maintain toughness and rigidity within the range of -40 to 100 ℃, and is not subject to electrical corrosion and soil corrosion. , The use temperature can reach 90 ℃. ABS pipes are used as plumbing pipes, gas transmission pipes, high-corrosion industrial pipes in foreign countries, and are generally used for indoor cold and hot water pipes and water treatment pipes and corrosive industrial pipes in China.