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Types and specifications of water supply pipe equipment should be selected according to the type of plastic used, material status and product size. The selection principle should be considered in terms of extrusion quality, production efficiency, energy consumption, machine life, reliability, universality and specificity. At present, a series of extruders have been formed in various plastic machinery factories in China. The diameter range of the screw of the plastic extruder which can produce pipes is 30-200 mm. If the single screw plastic extruder is selected for production, the diameter of plastic pipe can be controlled within 30% - 130% of the screw diameter, while the diameter of pipe can be controlled within 45% - 450% of the screw diameter when the parallel twin screw or star-catching twin screw plastic extruder is selected.
Different additives can be added according to different uses, and PVC products of PVC extruder exhibit different physical and mechanical properties due to different components, which can be used in different occasions. The proportion of PVC plastic pipe in plastic pipe is larger.
There are two kinds of hard and soft PVC pipes produced by water supply equipment. RPVC pipes are made by mixing PVC resin with stabilizers, lubricants and other auxiliaries, and by pelleting and extruding machine, or by one-time extrusion of powder. The RPVC pipe is resistant to chemical corrosion and insulation. It mainly conveyed various fluids and used for wire and bushing. The RPVC pipe is easy to cut, weld, bond and heat to bend, so it is very convenient to install and use. SPVC pipe is made by adding a large amount of plasticizer and stabilizer to PVC resin, as well as other additives, through granulation and extrusion molding. SPVC pipes have excellent chemical stability, excellent electrical insulation and good flexibility and coloring. They are often used instead of rubber pipes to transport liquids and corrosive media. They are also used as cable sleeves and wire insulation pipes. Selection of raw materials and formula, the hard pipe in the production of resin should be used in polymerization of SG-5 resin with low degree of polymerization, higher degrees, the physical and mechanical properties and heat resistance is better, but the resin fluidity, bring some difficulties to the process, so the general choice of the viscosity of SG-5 resin (1.7~1.8) * 10-3Pa - s for yi. Hard tube commonly used lead stabilizers PVC extruder, its thermal stability is good, the commonly used trisalty lead, but it is usually poor lubrication, and good lubrication, and lead barium soap. The processing of hard tube, it is very important to choose and use lubricant, it is necessary to consider the internal lubrication to reduce intermolecular forces, reduces the melt viscosity favorable forming, but also consider the external lubrication, prevent the melt and hot metal adhesion, make product surface bright. Internal lubrication is usually made of metal soap and low melting wax.
For plastic pipe products plumbing equipment production, such as city construction with the tap water pipe, gas pipe, drainage pipe, agricultural irrigation pipe, industrial chemical pipe, oil pipe etc.. These pipes are used in the production of plastic extrusion equipment is basically the same, mainly including extrusion machine, pipe extrusion die, shaping device, traction device, trademark printing device, cutting (or coiling) device, flaring and stacking device.
The main filler with calcium carbonate and barium (barite), calcium carbonate on the surface properties of pipe, barium can improve the formability of the tube is easy to shape, both can reduce the cost, but the amount is too much will affect the performance of the pipe, pressure pipe and pipe corrosion best without or with small amount of filler.PVC extrusion machine manufacturing and promotion Chinese first-class products Plastic molding machine products, committed to the global plastics machinery worry free operation, to create maximum value for customers. Our factory sincerely welcome a person of noble aspirations, to visit our company, negotiate a joint venture, cooperation projects to promote economic cooperation and technical exchanges, common development and create a great cause, in order to promote the development of China's national industry to make more contributions.
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