The extrusion molding of chlorinated polyvinyl chloride tube is more difficult than the extrusion molding of polyvinyl chloride tube. Because of the high viscosity of chlorinated polyvinyl chloride (about 2 times greater than the viscosity of PVC resin), the fluidity is poor, and the molding is relatively good. Difficulties, and the melt is easily decomposed during the production process, so the following problems should be noted in the extrusion molding of chlorinated polyvinyl chloride resin. 1 The chlorinated polyvinyl chloride resin must be dried before being put into production, and dried in a box at 80 °C for 2 to 4 hours. If necessary, the high-speed mixed raw materials are also sieved once with a 40-mesh sieve, and then put into extrusion. Production in the hopper. 2 The choice of stabilizers and other processing aids in the raw material formulation of the formed pipe should be based on the ability to enhance the melt flow and improve the thermal stability of the raw materials. If necessary, the formula can be mixed first, and the sample test is taken. It is placed in the box at 230 °C for 2 hours. If there is no obvious discoloration decomposition, the choice of auxiliary materials is reasonable. 3 The process temperature for extrusion molding of chlorinated polyvinyl chloride pipe is slightly higher than the extrusion process temperature of PVC pipe. However, it should be noted that the temperature control fluctuation cannot be greater than ±5 °C. 4 In the process of producing CPVC pipe, if there is a power outage, equipment failure, signs of possible decomposition of the melt or smoke from the die mouth, immediately stop feeding into the barrel, and remove the barrel and mold with PVC resin. CPVC melt, then stop again to troubleshoot. 5 The HCl gas released during the decomposition of CPVC melt is harmful to the human body, and attention should be paid to the ventilation of the production workshop. 6 Extruder barrels for the production of CPVC resin, the melt flowing through the surface of the screw and forming mold shall be treated with anti-corrosion treatment to extend the service life of the equipment parts. 7 The top cover of the mixing and mixing kneading machine should have an exhaust port (close the exhaust port with a 400 mesh copper mesh or cloth bag) to facilitate the evaporation of water vapor. 8 Select the extruder for CPVC pipe extrusion molding, pay attention to the performance conditions such as exhaust gas and process temperature control stability when the extruder barrel is working. If these two conditions fail to meet the production requirements, the extrusion of CPVC pipe Forming is difficult to add and can't even be produced. 9 When producing CPVC pipe, the screw should be cooled by circulating oil; the mandrel in the mold should have heating and cooling device, and the stability of the process temperature of these two parts should be adjusted and controlled in order to improve the fluidity of the molten material and ensure the fluidity of the molten material. The molding quality of the product (the control of the mandrel temperature has a great influence on the molding quality of the inner wall of the pipe). 10 When the inner wall of the formed pipe is uneven, the acrylate processing aid (also available as methyl methacrylate copolymer) should be added or appropriately added to the raw material formulation to improve the melting temperature of the mixture of CPVC and PVC. Close; at the same time, pay attention to the stability control of the mandrel temperature. In the formulation of CPVC pipe extrusion molding, CPVC and PVC resin can be used in combination. However, it is to be noted that the Vicat softening temperature of the mixed resin decreases as the amount of the PVC resin added increases. If the PVC in the formulation is 10 parts and the CPVC is 90 parts, the Vicat softening temperature is about 110 °C; when the PVC is 20 parts and the CPVC is 80 parts, the Vicat softening temperature is about 105 °C; the PVC resin and the CPVC resin are each At 50 parts, the Vicat softening temperature is about 90 °C. Organizer Travel Bags,Laundry Pouch Travel Bag,Travel Bags Organizer For Luggage,Travel Organizer Toiletry Bag Dongguan C.Y. RedApple Industrial Limited , https://www.zjhpgbags.com