Basic production functions of PVC pipe production line


Ningbo Fangli Technology Co., Ltd. is a mechanical equipment manufacturer with nearly 30 years’ experiences of plastic pipe extrusion equipment, new environmental protection and new materials equipment. Since its establishment Fangli has been developed based on user’s demands. Through continuous improvement, independent R&D on the core technology and digestion & absorption of advanced technology and other means, we have developed PVC pipe extrusion line, PP-R pipe extrusion line, PE water supply / gas pipe extrusion line, which was recommended by the Chinese Ministry of Construction to replace imported products. We have gained the title of “First-class Brand in Zhejiang Province”.


1. Raw material mixing: PVC stabilizer, plasticizer, antioxidant and other auxiliary materials are successively added into the high-speed mixer according to the proportion and process. The materials are heated to the set process temperature through the self-friction between the materials and machinery, and then the materials are reduced to 40-50 degrees by the cold mixer; in this way, it can be added to the hopper of the extruder.


2. Extrusion part: The extruder is equipped with quantitative feeding device to match the extrusion amount with the feeding amount to ensure the stable extrusion of products. Due to the characteristics of conical screw, the feeding section has a large diameter, which is conducive to the plasticization of materials due to the large heat transfer area and shear speed of materials. The diameter of screw in the metering section is small, which reduces the heat transfer area and shear speed of melt, so that the melt can be extruded at a lower temperature. When the screw rotates in the barrel, the PVC mixture is plasticized and pushed to the head, so as to achieve compaction, melting, mixing and homogenization; and achieve the purpose of exhaust and dehydration. The feeding device and screw drive device adopt frequency conversion speed regulation, which can realize synchronous speed regulation


3. Extrusion die part: PVC after compaction, melting, mixing and homogenization, and subsequent materials are pushed to the die through the screw. The extrusion die is a relevant part for pipe forming.


4. The vacuum tank is used for the setting and cooling of pipes. The vacuum tank is equipped with vacuum system and water circulation system for setting and cooling, stainless steel box, circulating water spray cooling, and the vacuum tank is equipped with front and rear moving devices and manual devices for left, right and high-low adjustment.


5. The haul-off is used to continuously and automatically lead the cooled and hardened pipe (pipe production line) out of the machine head for frequency conversion speed regulation.


6. Cutting machine: after being controlled by the travel switch according to the required length, it will automatically cut and delay the frame turnover to implement flow production. The cutting machine takes the fixed length switch signal as the command to complete the whole cutting process and keep pace with the pipe operation in the cutting process. The cutting process is driven by electric and pneumatic. The cutting machine is equipped with dust suction device to suck out and recycle the debris produced by cutting in time.


If you need more information, Ningbo Fangli Technology Co., Ltd. welcomes you to contact for a detailed inquiry, we will provide you with professional technical guidance or equipment procurement suggestions.


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