Plastic PVC (polyvinyl chloride) pelletizing lines are used in a wide range of industries, including but not limited to:
Construction field: Used for the production of PVC pipes, doors and Windows profiles.
Wire and cable industry: as insulation layer material.
Packaging industry: Manufacture PVC film, packaging bags, etc.
Commodity manufacturing: such as floor leather, artificial leather, raincoat and so on.
Agriculture: Used for irrigation pipes, greenhouse covering materials, etc.
PVC material has become one of the indispensable materials in many fields because of its good physical properties, chemical stability and processing properties.
▏Working principle of the device
The working principle of PVC granulation production line is based on the thermoplasticity of plastic, softening and melting PVC raw materials by heating, and then extrusion molding by extruder, and then cooling, cutting and other processes, and finally get PVC particles.
Heating and melting: the PVC raw material is heated to a molten state in the cylinder.
Extrusion molding: The molten PVC is pushed by the screw and extruded into continuous strips through the mold.
Cooling and curing: The extruded PVC strip is quickly entered into a cooling device, such as a sink or air cooling device, so that it is quickly cooled and cured.
Cut into pellets: The cooled PVC strips are cut into uniform pellets.
▏Main equipment composition
PVC granulation production line is mainly composed of the following equipment:
Raw material pretreatment equipment: such as crusher, mixer, etc., used for crushing, mixing and drying of raw materials.
Extruder: The core equipment, responsible for the extrusion of molten PVC molding.
Mold: Installed at the exit of the extruder to determine the shape and size of the extruder.
Cooling device: such as a sink or air cooling device, used to cool the extruded PVC strip.
Cutting machine: Cut the cooled PVC strip into particles.
Conveying equipment: such as vibrating screen, conveyor belt, etc., used for conveying and screening materials.
Control system: including temperature controller, speed controller, etc., used to monitor and adjust the running state of the production line.
▏Production process flow
The production process of PVC granulation production line is roughly as follows:
1. Raw material preparation: the PVC raw material is broken, mixed and dried.
2. Melt extrusion: the pretreatment of raw materials into the extruder, heating and melting after extrusion molding.
3. Cooling and curing: The extruded PVC strips quickly enter the cooling device for cooling and curing.
4. Cut into pellets: The cooled PVC strip is cut into uniform particles.
5. Screening and packaging: The cut particles are screened, unqualified products are removed, and then packaged.
▏Temperature and speed control
Temperature and speed are key parameters in PVC pelletizing production line, which directly affect product quality and production efficiency.
Temperature control: Through the heater and temperature controller, the temperature of the barrel, die and extruder head is precisely controlled to ensure that the PVC raw material maintains the appropriate temperature range during the melting process.
Speed control: By adjusting the screw speed of the extruder, the extrusion speed and extrusion amount of PVC raw materials are controlled, so as to adjust the production efficiency and particle size.
▏Product quality control
In order to ensure the quality of PVC particles, the production line needs to take the following quality control measures:
Raw material inspection: Strict inspection of raw materials to ensure that they meet production requirements.
Process monitoring: Through online monitoring equipment, real-time monitoring of the production process temperature, pressure, speed and other parameters.
Finished product inspection: The appearance, size, weight and other items of the cut PVC particles are inspected to ensure that the product quality meets the standard.
▏Equipment maintenance and maintenance
The equipment maintenance and maintenance of PVC granulation production line is the key to ensure the long-term stable operation of the production line.
Regular cleaning: Clean the equipment regularly to remove oil and impurities.
Lubrication maintenance: Lubricate the sliding parts of the equipment to reduce wear and friction.
Check fastening: Check the fasteners of the equipment regularly to ensure that they are fastened reliably.
Replacement of worn parts: timely replacement of severely worn parts, such as screws, molds, etc.
▏Precautions
When operating the PVC granulation production line, pay attention to the following matters:
Safety first: strictly abide by the operating procedures to ensure the safety of personnel and equipment.
Raw material selection: Choose PVC raw materials that meet the production requirements to avoid the use of inferior raw materials leading to product quality problems.
Temperature control: strictly control the heating temperature and extrusion temperature, to avoid too high or too low temperature lead to product quality decline.
Speed adjustment: Adjust screw speed according to production needs to ensure production efficiency and particle size stability.
Equipment maintenance: Regular maintenance and maintenance of the equipment to extend the service life of the equipment.
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We have been specializing in the production of machinery for over 20 years, providing you with one-stop plastic machinery production, installation, and debugging services.
