Analysis of the function of PVC sheet equipment

Raw material mixing of PVC sheet equipment: Add PVC stabilizer, plasticizer, antioxidant and other auxiliary materials to the high-speed mixer according to the proportion and process, and heat the material to the set value through the friction between the material and the machine. process temperature, and then use a cold mixer to cool the material to 40-50 degrees; so it can be added to the hopper of the extruder.

Extruder part: The PVC sheet equipment is equipped with a quantitative feeding device, which can match the extrusion volume and feeding volume to ensure stable extrusion of the product. Due to the characteristics of the conical screw, the diameter of the feeding section is large, which has a large heat transfer area and shear speed for the material, which is beneficial to the plasticization of the material. The screw diameter of the metering section is small, which reduces the heat transfer area and shear rate of the 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; achieve the purpose of exhaust dehydration. The feeding device and screw drive adopt frequency conversion speed regulation, which can realize synchronous speed regulation.

The extrusion die part of the PVC sheet equipment: After the PVC is compacted, melted, mixed and homogenized, the subsequent materials are pushed to the die through the screw. The extrusion die is the key component of pipe forming. Vacuum forming tanks are used for forming and cooling pipes. The vacuum forming water tank is equipped with vacuum system and forming cooling water circulation system, stainless steel box and circulating water spray cooling. The vacuum setting water tank is equipped with a front and rear moving device and a left and right and height adjustment manual device.

The tractor is used to continuously and automatically pull out the cooled and hardened pipes from the machine head, and the speed is adjusted by frequency conversion.

Cutting machine: After being controlled by the travel switch according to the required length, it will automatically cut, and the shelves will be turned over with a delay to realize flow production. The cutting machine uses the fixed-length switch signal as the command to complete the entire cutting process. The cutting process is synchronized with the pipeline operation. The cutting process is completed by electric and pneumatic drives. The cutting machine is equipped with a vacuum device to suck out and recover the debris generated during the cutting process in time.

The turning action of the turning frame is realized by the air circuit control of the cylinder. There is a limit device on the flip frame. After the pipe has been cut by the dicing saw, the pipe continues to be transported. After the delay, the cylinder starts to work, realizes the turning action, and achieves the purpose of unloading. After unloading, it will automatically reset, delay for a few seconds, and wait for the next cycle.

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