Key points of process operation of high-quality extrusion molding manufacturers: the extrusion molding of chlorinated polyvinyl chloride pipe is more difficult than that of polyvinyl chloride pipe. Due to the high viscosity of chlorinated polyvinyl chloride melt (about 2 times higher than that of PVC resin), poor fluidity, molding is difficult, and the melt is easy to decompose in the production process, Therefore, the following problems should be paid attention to in the extrusion production of chlorinated polyvinyl chloride resin.
Attention should be paid to the selection of stabilizers and other processing aids in the raw material formula of forming pipes of high-quality extrusion molding companies, which should be able to strengthen and improve the melt fluidity and improve the thermal stability of raw materials. If necessary, mix the formula first. Take small samples for test and place them in 230 ℃ oven for 2h. If there is no obvious discoloration and decomposition, it indicates that the selection of auxiliary materials is reasonable (the material temperature after high-speed mixing is in the range of 115 ℃ ~ 120 ℃).
In the process of producing CPVC pipe, in case of power failure, equipment failure, signs of possible decomposition of molten material or smoke from the die opening, stop feeding into the barrel immediately, remove CPVC molten material in the machine Jane and die with PVC resin, and then stop the machine for troubleshooting.