Suzhou Jwell Machinery Co., Ltd. is a large-scale plastic extrusion machinery manufacturer in China. The company produces more than 2,000 advanced extrusion production lines each year. Its products are exported to all over the world, including Germany, the United States, Japan, Spain and other developed countries. Today, we will introduce Suzhou Jwell Machinery’s extruder products in detail. If you are interested, let’s learn about it together!
What is an extruder?
An extruder is a mechanical device that continuously transports, melts and extrudes raw materials (such as plastics, metals, foods, etc.) from a mold by heating, pressurizing, shearing and pushing. It is widely used in plastic processing, rubber molding, food manufacturing, metal molding, cable coating and other fields.
In the plastics industry, extruders are key equipment for the production of sheets, films, pipes, profiles, hollow products, granular materials and other products. Due to its advantages of high degree of automation, large output, strong continuity and strong customizability, it has become an indispensable core equipment in modern manufacturing.
Jwell Extruder Introduction
Blown Film Extrusion Line is a manufacturing equipment specially designed to produce plastic films. The process of using a blown film machine to make plastic films involves melting plastic resin pellets and extruding them through a circular die into a molten plastic tube. This tube is inflated, inflating like a balloon to a specific size and thickness. When it cools down, it is flattened and rolled into a roll. This process is called blown film extrusion, and it is used to produce plastic films of consistent thickness and quality.
Blown Film Extrusion Line plays a key role in plastic film production, taking care of the entire process from melting the plastic resin to rolling the finished product into rolls. This machine has several key components, including the extruder, die, gas ring, pressure roller, and coiler. Each component is designed to perform a specific function, such as heating and melting plastic resin, forming and cooling molten plastic into a tube, and rolling finished plastic film into rolls.
Jwell Board Extrusion Line is compact in structure and superior in performance. The screw and barrel are optimized in design and are professionally processed with high-performance alloy steel so that the entire production line has the advantages of uniform plasticization, stable extrusion, and long life.
A film extrusion line is a manufacturing process that produces plastic films by using an extruder. The process begins with pelletizing the plastic raw material, which is then fed into an extruder. The material is then melted, filtered and forced through a die to form a continuous film. The film is then cooled, flattened and wound onto rolls for further processing or packaging. The film extrusion line is used to produce various plastic films such as LDPE, HDPE, PVC, PP film, etc., which are widely used in packaging, agriculture, construction and other industries.
The floor extrusion line is a popular product of jwell machinery, it uses extruders to produce continuous and uniform sheets of plastic, PVC or other materials, which are then shaped into various types of floor products such as tiles, planks or rolls . The process involves melting raw material in an extruder and pushing it through a die that determines the final shape and size of the product. The resulting slabs are then cooled, trimmed and cut to length before being packaged and shipped to customers.
PP PPR PE PVC pipe extruder machine can be a single screw extruder or twin screw extruder.
The single-screw extruder conveys materials by friction, and its melting and plasticizing effect is not as good as the twin-screw extruder, but the cost is very low.
At present, polyethylene and polypropylene pellets are generally formed by single-screw extruders. Most of the screws are not conventional three-section full-thread screws, but mixing elements are added to the screw to enhance the mixing and plasticizing effect.
The raw material of polyvinyl chloride is in powder form. If it is produced by a single screw extruder, it must be mixed and granulated in advance, which increases the production process.
Therefore, the current production of PVC powder directly uses a conical twin-screw extruder for mixing and molding. When designing or selecting the extruder screw for PVC pipe extruder machine, its structure and parameters should consider the heat-sensitive performance of PVC (especially rigid PVC).
Jwell Pipe Extrusion Line is able be easily controlled. With stable performance, pipelines can keep high efficient output capacity. Further, that PP PPR PE PVC pipe extruder machine’s long service life is also the reason that you can trust Jwell.
Plate extrusion Line includes feeder, extruder, mold, three-roll calender, cooling bracket, trimming device, tractor, laminating device, hanging film device, shearing machine, conveyor, manipulator and roll temperature Controller.
Products from extrusion molding to processing finished products to collection are completed automatically in one line, with high production efficiency, very few manual use, and rapid and stable sheet forming.
Jwell profile extrusion lineuses the raw material to manufacture high-quality extruded products, which are used to support building, floor, or play industry.
JWELL Rod extrusion line is an efficient, flexible and energy-saving advanced equipment that uses the extrusion process to manufacture various types of plastic products, including pipes, plates and profiles. Its features include high-speed production capabilities, diversified product adaptability, precise control systems, and energy-saving and environmentally friendly features. It is widely used in the field of plastic product production, creating significant economic benefits for customers, and is an ideal production equipment choice.
A sheet extrusion line includes an extruder (double or single screw), outfitted with a screen changer plus a gear pump, followed closely with a static mixer (occasionally feeding a coextrusion feed block that’s preceded by one or more added extruders sets as explained previously ), feeding a level sheet expire.
How does an extruder work?
The working process of an extruder mainly includes feeding, plasticizing, melting, compression, metering, molding and other links, which are usually completed by the following core components:
Hopper: The raw materials enter the equipment from here;
Screw: Rotates under the drive of the motor, pushes the material forward and melts it under heat;
Barrel: Provides wrapping space for the screw and is equipped with a heating system;
Heating zone and cooling system: Control the temperature in sections to ensure stable processing of materials;
Die: Determines the shape of the product;
Traction device, cooling device: Assists in product shaping and output.
The principle of extrusion is to heat and melt the thermoplastic material under pressure, and continuously extrude and mold it, which can achieve efficient and large-scale production.
Extruder process flow
The following table shows the standard process flow of general plastic extrusion processing:
Raw material preparation: material drying, premixing, and impurity removal
Feeding: Put the raw materials into the hopper
Screw feeding and heating: Push and gradually heat to the set temperature through the screw
Melting and mixing: The material is fully melted and mixed evenly at high temperature
Metering and compression: Control the output to ensure product consistency
Mold forming: Press out the product shape through the mold, such as film, pipe, granules, etc.
Cooling and traction: Use air cooling, water cooling or vacuum cooling system for rapid shaping
Cutting and winding: The product is cut or wound according to specifications
The entire process is highly automated and suitable for manufacturing scenarios with strong continuity.
What does the extruder do?
The core functions of the extruder are as follows:
Material melting and plasticization: With the help of screw shearing and electric heating functions, solid materials are transformed into processable melts;
Material transportation and homogenization: High-efficiency continuous advancement, while mixing different components of raw materials;
Pressure construction: Increasing pressure through the metering section allows the melt to pass through the mold smoothly;
Continuous molding: Different mold structures determine the final shape of the product, such as diaphragms, pipes, sheets, etc.;
Control stability: The consistency of product quality can be controlled by parameter settings (temperature, pressure, speed).
In short, the extruder is the “core processing engine” that converts raw materials into functional end products.
How to remove consumables from the extruder?
When replacing consumables or maintenance, residual materials need to be removed from the extruder. The following are the general steps:
Stop feeding: turn off the hopper feed;
Empty the raw materials: continue to run the screw to push out the remaining raw materials in the barrel;
Add purging compound: special purging compound helps dissolve the residue;
Run idly for a few minutes: let the purging compound fully contact the entire screw and barrel;
Remove the die head (if necessary) ：for physical cleaning;
Wait for cooling: After the temperature drops to a safe range, clean the residue manually.
Precautions:
Wear protective gloves and goggles during operation;
Avoid disassembling the mold when the screw is not stopped;
Some high-temperature materials such as PVC and PBT need to be cleaned by professionals to prevent poisoning or corrosion.
Main application areas of extruders
Extruders are widely used in the molding and processing of various raw materials. The following are the main areas:
Plastic processing: continuous products such as pipes, profiles, plates, films, cable sheaths, etc.
Packaging material manufacturing: multi-layer co-extruded films, shrink films, foam materials, heat-sealed films, etc.
Food industry: noodles, puffed food, pet feed, energy bars, etc.
Rubber and seal manufacturing: automotive rubber strips, O-rings, shock-absorbing pads
Medical materials and consumables: medical hoses, catheters, infusion tubes, experimental consumables
Metal extrusion: aluminum profiles, copper tubes, alloy plates
3D printing consumables: preparation of wires such as PLA/ABS/TPU
Environmentally friendly materials: biodegradable films, EVA solar films, recycled plastic granulation
Comparative analysis of different types of extruders
| Production Line Type | Main Material | Final Product | Key Features | Typical Applications | Die Structure |
| Blown Film Extrusion Line | LDPE, LLDPE, HDPE, EVA | Plastic films | Film is blown vertically by air ring; high transparency possible | Packaging, agricultural film, bags | Circular blown die |
| Sheet Extrusion Line | PP, PS, PET, ABS | Sheets (1–10mm thickness) | Uniform thickness, wide format possible | Packaging trays, folders, signage | Flat T-die |
| Cast Film Extrusion Line | PP, PE, CPP, BOPP | Thin plastic films | Fast cooling, high gloss and clarity | Food packaging, stretch film, protective film | Flat die + chill roll |
| Flooring Extrusion Line | PVC, SPC, WPC, PP | Flooring panels (multi-layer) | Rigid, multilayer co-extrusion | Vinyl flooring, laminate floors, click floors | Complex die + calender rollers |
| Pipe Extrusion Line | PVC, PE, PPR, PEX | Pipes/tubes (Ø5–1000mm) | Stable pressure, sizing sleeve cooling | Water pipes, gas pipes, conduit systems | Pipe die + vacuum tank |
| Profile Extrusion Line | PVC, ABS, ASA, WPC | Complex cross-section profiles | Customizable mold shapes, continuous profile | Window frames, cable ducts, wall panels | Profile die |
| Rod Extrusion Line | Nylon, PTFE, PP, POM | Solid plastic rods | Compact structure, used in CNC machining | Industrial parts, gears, sealing rods | Circular or annular die |
| Plate Extrusion Line | HDPE, UHMWPE, PP | Thick plates (10–60mm) | High rigidity, used in heavy industries | Chemical tanks, cutting boards, liners | Wide flat die + 3-roll stack |
| Sheet (Thin) Extrusion Line | PETG, PVC, PS | Thin sheets (0.2–2mm) | Fast production, ideal for thermoforming | Display covers, blister packaging | Flat die + cooling rolls |
Conclusion
As a key equipment for continuous, efficient and automated material forming in modern industry, extruder has been widely used in many industries. It is not only the main equipment in the plastics industry, but also plays an important role in food, medical, rubber, metal and even environmental protection.
When choosing an extruder, enterprises should consider the selection based on factors such as raw material type, target product form, output demand, budget range, etc. At the same time, in order to ensure efficient operation of the equipment and extend its service life, it is necessary to combine scientific operating procedures and regular maintenance strategies.
With the development of new materials and the upgrading of intelligent manufacturing, extrusion technology in the future will tend to be highly intelligent, highly integrated, energy-saving and environmentally friendly, and multi-functional, which will further promote the evolution of the industry.
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