Plastic Sheet Extruder
Product Overview
Our plastic sheet extruder is a professional extrusion equipment specially developed for producing high-quality plastic sheets, mainly applicable to PP (Polypropylene) and PS (Polystyrene) materials. It is mainly used as supporting equipment for thermoforming machines, providing high-standard, stable and uniform plastic sheets for the production of disposable plastic cups, lunch boxes, blister packaging and other thermoformed products.
Adopting advanced single-screw extrusion technology and precision mold design, the machine can stably produce plastic sheets with adjustable thickness and width, meeting the diverse needs of different thermoforming processes. It integrates feeding, melting, extrusion, calendering and winding, realizing automatic continuous production, which greatly improves production efficiency and reduces manual operation intensity.
The whole machine is made of high-quality structural steel and wear-resistant alloy materials, with scientific layout, compact structure and small floor space. It has the characteristics of stable operation, low energy consumption, easy maintenance and long service life. It is an essential core equipment for disposable plastic product manufacturers to build integrated production lines of sheet extrusion and thermoforming.
We provide personalized customization solutions according to the specific requirements of customers (such as sheet thickness, width, material formula), and offer full-process technical support including equipment installation, commissioning, operation training and after-sales maintenance, helping customers reduce production costs and improve product quality.
1. Main Machine Structure & Components
The plastic sheet extruder adopts modular integrated design, consisting of 6 core systems, with clear division of labor, easy disassembly and maintenance, and stable operation performance:
1.1 Automatic Feeding System
Composed of a storage hopper, a screw feeder, a frequency conversion motor and a material level sensor, it is specially designed for PP and PS granular raw materials. It can realize automatic quantitative feeding, avoid uneven feeding caused by manual operation, ensure stable material supply for the extrusion system, and effectively prevent material blocking and waste.
1.2 Single-Screw Extrusion System
It is the core part of the whole machine, composed of a high-precision screw, a barrel, a heater and a temperature control device. The screw is made of 38CrMOA1A high-quality nitrided steel, surface alloy spraying, with strong wear resistance and corrosion resistance; the barrel adopts segmented heating and precise temperature control, which can fully melt PP and PS raw materials, ensure uniform plasticization, and lay a foundation for high-quality sheet extrusion.
1.3 Filter & Mold System
It includes a hydraulic screen changer, a precision filter and a T-type sheet die. The hydraulic screen changer can quickly replace the filter screen without stopping the machine, ensuring continuous production; the precision filter can effectively remove impurities in the molten material, ensuring the purity of the sheet; the T-type die adopts precision processing, with adjustable die lip gap, which can accurately control the thickness of the sheet, and the extruded sheet has a flat surface and uniform thickness.
1.4 Calendering & Cooling System
Composed of three precision calendering rollers, a cooling water tank and an air cooling device, it is used to shape and cool the extruded molten sheet. The three calendering rollers adopt mirror polishing treatment, with high smoothness, which can make the surface of the sheet smooth and free of burrs; the cooling water tank and air cooling device work together to quickly cool the sheet, prevent the sheet from deformation, and ensure the dimensional stability of the sheet.（
1.5 Traction & Winding System
It consists of a traction roller, a frequency conversion traction motor and an automatic winding machine. The traction roller adopts adjustable pressure design, which can stably pull the cooled sheet, ensuring uniform traction speed; the automatic winding machine can adjust the winding tension according to the thickness and softness of the sheet, realizing neat and tight winding, which is convenient for storage, transportation and subsequent use of the sheet.
Adopting PLC programmable controller, touch screen human-machine interface, frequency conversion speed regulation and fault alarm system, it integrates temperature control, speed control, feeding control and winding control. All parameters (such as extrusion temperature, traction speed, feeding amount) can be set and adjusted with one click, the operation is simple and easy to learn, and the fault alarm function can timely remind operators to handle abnormalities, ensuring safe and stable production.
2. Working Principle
The plastic sheet extruder adopts the principle of single-screw extrusion and continuous calendering forming, and the whole working process is fully automatic, which is mainly divided into 5 steps, and is specially optimized for PP and PS materials to ensure the stability and quality of the sheet:
1. Automatic Feeding: Put PP or PS granular raw materials into the storage hopper, and the automatic feeding system sends the raw materials into the barrel of the extrusion system quantitatively and stably according to the set parameters.
2. Melting & Plasticizing: The barrel is heated in sections, and the screw rotates at a constant speed to shear, knead and push the raw materials forward. Under the action of high temperature and pressure, the PP/PS raw materials are gradually melted and plasticized into a uniform molten state.
3. Filtration & Extrusion: The molten material passes through the precision filter to remove impurities, then enters the T-type die through the hydraulic screen changer, and is extruded into a continuous sheet-like molten material under the action of the die.
4. Calendering & Cooling: The extruded molten sheet is sent to the three calendering rollers for shaping, making the sheet surface smooth and thickness uniform; then it enters the cooling water tank and air cooling device for rapid cooling, so that the sheet is solidified and shaped, and the dimensional stability is ensured.
5. Traction & Winding: The cooled and shaped sheet is stably pulled by the traction system at a constant speed, and then the automatic winding machine winds the sheet into a roll according to the set tension, completing the whole production process of plastic sheet. The produced sheet can be directly sent to the thermoforming machine for subsequent processing.
3. Main Features
Material Adaptability: Specialized for PP and PS materials, with optimized extrusion and plasticizing parameters, which can fully exert the performance of the materials, and the produced sheet has uniform texture, high toughness and good forming performance, perfectly matching the thermoforming process.
Full Automation: Integrating automatic feeding, extrusion, calendering, cooling and winding, it realizes unattended continuous production, reduces manual operation, improves production efficiency, and avoids quality errors caused by manual operation.
Precise Control: Adopting precise temperature control and die adjustment technology, the sheet thickness error is small (±0.02mm), the surface is smooth and flat, no burrs, no bubbles, and meets the high-standard requirements of thermoforming raw materials.
Stable & Energy-Saving: The whole machine is made of high-quality materials, with stable operation, low failure rate and long service life; the frequency conversion speed regulation technology is adopted, which can adjust the production speed according to the demand, reduce energy consumption and save production costs.
Strong Compatibility: It can be perfectly connected with various types of thermoforming machines to form an integrated production line of sheet extrusion and thermoforming; it supports customization of sheet thickness (0.1-2mm) and width (500-1500mm) to meet diverse production needs.
Easy Maintenance: Modular design, clear division of components, convenient disassembly and maintenance; the key components (screw, barrel, calendering roller) are wear-resistant and corrosion-resistant, reducing the frequency of maintenance and maintenance costs.