PVC Granulation Line
PVC granulation line is the core equipment for recycling and processing of polyvinyl chloride (PVC) plastics. It converts PVC resin, additives and recycled waste into reusable granular raw materials through physical processing and is widely used in various links of the plastic industry chain.
| Model | Extruder Model | Motor Power (kW) | Capacity (kg/h) | Cooling Stages |
|---|---|---|---|---|
| PZL-51 | SJSZ51 | 18 | 90 | 1 |
| PZL-55 | SJSZ55 | 22 | 125 | 2 |
| PZL-65 | SJSZ65 | 37 | 200 | 3 |
| PZL-80 | SJSZ80 | 55 | 400 | 3 |
| PZL-92 | SJSZ92 | 110 | 600 | 3 |
PVC granulation line has the following characteristics:
High-efficiency plasticization
– The screw for the PVC granulation line has a unique design and good conveying and plasticizing capabilities, which can make the PVC raw materials achieve uniform plasticization in a shorter time and improve production efficiency. For example, the meshing screw of the twin-screw granulator can produce strong shearing and mixing effects, and even highly filled or difficult-to-process PVC materials can achieve efficient plasticization.
– The barrel for the PVC granulation line is equipped with a precise heating and cooling system, which can accurately control the temperature according to different PVC raw materials and production process requirements to ensure the quality of plasticization.
Uniform mixing
– Some PVC granulation line screws are equipped with special mixing elements, such as kneading blocks, reverse threads, etc., which can fully mix PVC resin with various additives, such as plasticizers, stabilizers, fillers, etc., to ensure the consistency of product performance.
– For PVC formulas that require the addition of multiple different ingredients, the PVC granulation line can achieve uniform dispersion of each component at the microscopic level, thereby improving the stability of product quality.
Strong adaptability
– The PVC granulation line can adapt to PVC raw materials of different types and performance requirements by adjusting the screw combination, process parameters, etc., including general-purpose PVC, high-impact PVC, heat-resistant PVC, etc.
– The PVC granulation line can not only process new PVC resin raw materials, but also regenerate and granulate recycled waste PVC to achieve the recycling of resources.
High degree of automation
– Equipped with advanced control systems, it can realize real-time monitoring and automatic adjustment of key parameters such as temperature, speed, and pressure. The operator only needs to set the parameters on the control panel, and the equipment can run stably according to the preset program.
– It has fault diagnosis and alarm functions. When the equipment is abnormal, it can stop in time and prompt fault information, which is convenient for maintenance personnel to quickly troubleshoot and reduce downtime.
Energy saving and environmental protection
– The use of efficient heating technology, such as electromagnetic heating, has higher thermal efficiency than traditional resistance heating methods, and can save 20%-30% of energy.
– Some new PVC granulation line have optimized the screw structure and transmission system in design, reduced the energy consumption of the equipment during operation, and improved production efficiency, achieving the unity of energy saving and high efficiency.
The production process of the PVC granulation line mainly includes the following steps:
Raw material preparation
PVC resin, plasticizer, stabilizer, filler, etc. are mixed evenly in a certain proportion to make a mixture that meets the production requirements. For example, when producing soft PVC particles, the amount of plasticizer added will be relatively large; while when producing hard PVC particles, the amount of plasticizer will be reduced and the proportion of stabilizer and filler will be increased.
Feeding
The mixture is added to the hopper of the PVC granulation line through an automatic feeder or manually. The automatic feeder can improve the feeding efficiency and ensure the continuity and stability of the feeding.
Plasticizing extrusion
After the mixture in the hopper enters the barrel, it gradually heats up, softens, and melts and plasticizes under the combined action of the shear force, friction force, and external heating generated by the rotation of the screw. Different sections of the screw have different functions, such as the feeding section is responsible for conveying the material, the compression section compresses and preliminarily plasticizes the material, and the metering section ensures that the material is extruded evenly and stably. The molten PVC material is pushed to the die head by the screw.
Cooling and shaping
The PVC material extruded from the die head is in strip shape and is cooled and shaped by air cooling or water cooling. Air cooling uses the cold air blown by the fan to cool the material, while water cooling cools the material through a water tank. Water cooling has a faster cooling speed, but it is necessary to control the cooling water temperature to prevent defects on the surface of the material.
Pelletizing
The cooled PVC strip material enters the pelletizer and is cut into pellets of a certain length by a rotating cutter. There are two types of pelletizing: hot cutting and cold cutting. Hot cutting is cutting before the material is completely cooled after extrusion, which is suitable for soft PVC; cold cutting is cutting after the material is completely cooled, which is often used for hard PVC.
Screening and packaging
The cut PVC pellets are screened by a vibrating screen to separate the pellets that do not meet the particle size requirements and return them for reprocessing. Qualified pellets are packaged by a packaging machine for storage and transportation.
Unit specifications of PVC Granulation Line
SJ Series Rigid Plastic Single Screw Pelletizing Line
The SJ Series Rigid Plastic Single Screw Pelletizing Line is suitable for PP, PE, ABS, PC, PS flakes and scraps pelletizing. The extruder uses the high efficiency screw barrel to ensure the plasticizing effect and high output of the finished product. The forced vacuum exhaust system effectively removes low molecular impurities, moisture and ink. According to the contamination of material and customers’ habits, the variety of screen changers are available: plate screen changer, column screen changer and automatic screen changer. For different purposes, the variety of screw L/D ratio, two stage extrusion system and pelletizing method are available.
PVC Crusher Machine
High quality blade for PVC crusher machine of long life machine running
