Single Screw PET Sheet Extrusion Production Line

Single Screw Plastic Sheet Extruder PET Sheet Extrusion Production Line
Single Screw Plastic Sheet Extruder PET Sheet Extrusion Production Line
Single Screw Plastic Sheet Extruder PET Sheet Extrusion Production Line
Single Screw Plastic Sheet Extruder PET Sheet Extrusion Production Line
Single Screw Plastic Sheet Extruder PET Sheet Extrusion Production Line
Single Screw Plastic Sheet Extruder PET Sheet Extrusion Production Line
Single Screw Plastic Sheet Extruder PET Sheet Extrusion Production Line
Single Screw Plastic Sheet Extruder PET Sheet Extrusion Production Line
Single Screw Plastic Sheet Extruder PET Sheet Extrusion Production Line

Single Screw PET Sheet Extrusion Production Line

A single screw plastic sheet extruder will generally be used for melting continuously, and then it will be compressed, extruded, and solid material will be formed within a heated barrel. The single screw extruder actually has been developed from the basic spiral structure, e.g., damping screw block, slotted screw barrel, exhaust screw, building block structure, pin barrel, and many other different types of structures. Since the single screw plastic sheet extruder will generally occupy a small space, it has turned into the main equipment that is used in the area of compound processing as well as plastic blown film.

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Product Introduction

Your Professional SSingle Screw PET Sheet Extrusion Production Line Manufacturer in China!

Dongguan Taiwan Tai Zhang Machinery Co., Ltd. is located in Dongguan, the "World Factory". The company is committed to the research and development, manufacturing and sales of sheet and film extrusion equipment. We specialize in the production of sheet extruders, cast film extruders and other equipment. Our company strives for survival by quality, development by brand, and provides customers with high-quality and reliable products with an efficient and flexible production management model and a pragmatic attitude!

PLA Biodegradable Sheet Extruder PET PP PS Plastic Extruder Machine

PLA Biodegradable Sheet Extruder is a specialized manufacturing system designed for the production of PLA plastic sheets. PLA is a biodegradable bio-plastic, commonly used as an environmentally friendly alternative to traditional petroleum-based plastics. The PLA sheet extrusion extruder involves various processes to convert PLA resin into sheets of different sizes and thicknesses.

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High Speed Vacuum Molding Machine

High speed vacuum molding machine is designed by the principle of mechanical-electrical-pneumatic integration. It adopts PLC control system, panel and digital power control. This full-automatic forming equipment for thermoforming plastic sheet includes feeding, heating, forming, cooling, mold ejecting, cutting by one process. The machine is suitable for making all size packing containers, in open-type with thin-wall, by using roll-sheet, under high-speed vacuum suction-forming processing.

Plastic Sheet Crusher Online

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Cup-making Blister Online Crusher

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Extruding Machine Single Screw PET Plastic Extrusion Machine

The plastic sheets produced by the PET non-drying exhaust single-screw extruder have high transparency and good toughness, and are especially suitable for easy recycling of PET in food packaging or other packaging fields. Sheet production and sheet machine manufacturing companies cooperate with each other and introduce them together, which also improves the overall development level of the plastic sheet industry.

Why Choose Us

Rich Products
We provide a wide range of products mainly including: PLA/ PET/ PP/ PE/ PS/ ABS/ APET, PETG, CPET sheet production lines, PC, PMMA optical sheet production lines, PVC/ PP/ PE/ PS/ PC/ ABS sheets Production lines, ABS, HIPS single-layer, multi-layer sheet production lines, plastic vacuum forming machines and plastic machinery.

High Quality Products
Our products will undergo several product inspections before being sent out to ensure product quality. And we have 100% quality assurance responsibility for our customers, and we will be responsible for any quality problems that arise.

Excellent Service
We have online customer service every day to answer your questions about the product, handling the customer complaint and solve problem for customers. Our customer service will also follow up on product usage.

Rich Experience
Our company has 15 years of industry experience, and our professionals have excellent knowledge and skills. We strive for excellence in product manufacturing and have a complete product production line.

Introduction of Single Screw PET Sheet Extrusion Production Line

Working principle of Single Screw PET Sheet Extrusion Production Line

The Conveying Section

The material here is not required to be plasticized, but it must be preheated and compacted. In the past, the old extrusion theory believed that the material here was loose. Later, it was proved that the material here is actually a solid plug, which means that the material is a solid like a plug after being squeezed, so its function is to complete the delivery task.

The Compression Section

At this time, the volume of the screw groove gradually becomes smaller, and the temperature must reach the degree of plasticization of the material. The compression produced here is from the third conveying section, and the compression is here to one. This is called the compression ratio of the screw - 3:1. There are also changes for other machines. The plasticized material enters the third stage.

The Measurement Section

The material here maintains the plasticizing temperature, just like a metering pump, to accurately and quantitatively transport the melt material to supply the machine head. At this time, the temperature cannot be lower than the plasticizing temperature, generally slightly higher. The single screw plastic sheet extruder machine is mainly used for extruding soft and hard polyvinyl chloride, polyethylene and other thermoplastic plastics. It can process a variety of plastic products, such as films, tubes, and plates, in conjunction with corresponding auxiliary machines (including molding heads), and it can also process the granulation.

The Difference Between Single and Twin Screw Extruders

Single Screw PET Non Drying Exhaust Single Screw Extruder

PLA Biodegradable Sheet Extruder PET PP PS Plastic Extruder Machine

Single Screw Is Cheaper
The single-screw extruder has a simple structure and low price. The twin-screw structure is complex and the price is high. Twin-screw extruders are about twice as expensive as single-screw extruders.

Single Screw Formula Is Simple
To be honest, in terms of operation, there is actually not a big difference between the two. However, the process and formula of a single-screw extruder are relatively simple, while the process, process and formula of a twin-screw extruder are more complex.

Twin Screws Can Be Freely Combined.
Twin-screw threads can be combined at will according to the material conditions and the operator's mood. A single screw is relatively rigid and cannot be combined.

Twin Screws Are More Efficient
Twin-screw extruders have large output, fast extrusion speed, and low energy consumption per unit output, while single-screw extruders are inferior. The efficiency of twin-screw extruders is about twice that of single-screw extruders. It depends on the manufacturer and model.

Twin-Screw Mixing and Plasticizing Ability Is Strong
To put it simply, the single screw is suitable for plasticizing extrusion of polymers and extrusion processing of pellets, such as molding, film blowing, injection molding, etc., and uses a wide range of materials. The twin-screw extruder has good mixing and plasticizing capabilities and is more suitable for the modification of plastics. And the twin-screw extruder can produce two colors.

Single Screw for Easy Maintenance
In terms of maintenance, single screws are simpler than twin screws because the structure of a single screw is relatively simple and easy to repair.

Conveying Mechanism
The transportation of a single-screw extruder mainly relies on the friction generated between the material and the barrel. The counter-rotating twin-screw extruder is forward conveying, which has the effect of forcing the material forward, and the counter-rotating twin-screw extruder The mesh of the two screws also produces shearing effect on the material.

Velocity Field
While the velocity distribution in a single-screw extruder is relatively clear and easy to describe, the situation in a counter-rotating twin-screw extruder is quite complex and difficult to describe. This is mainly because the screw has a meshing area. The complex flow that occurs in the meshing area gives it many advantages such as sufficient mixing, uniform heat transfer, strong melting ability, and good exhaust performance. However, it is difficult to accurately analyze the flow state of the meshing area.

Common Faults of Single Screw PET Sheet Extrusion Production Line

Screw Wear
The normal wear of the screw and barrel of the extruder machine mainly occurs in the feeding area. The main cause of wear is the high hardness of the raw material before melting and the friction with the metal surface of the screw element. When the material heats up and softens, the wear would slow down.

Abnormal Noise
If it happens in the gearbox, it may be caused by damaged bearings or poor lubrication, or it may be caused by improper gear installation and adjustment or poor meshing. It can be solved by replacing bearings to improve lubrication and changing gears or adjusting gear meshing conditions. If the noise of the extruder machine is a sharp scraping sound, the center position of the barrel should be considered to be deviated, and the possibility of scraping the shaft head and the transmission sleeve can be solved by adjusting the barrel. If the heat-resistant and abrasion-resistant extruder machine barrel makes noise, it may be that the screw is bent to sweep the bore or the set temperature is too low to cause excessive friction of solid particles. It can be handled by straightening the screw or increasing the set temperature.

Abnormal Vibration
If this happens at the gearbox of the extruder machine, it is caused by the wear of the bearings and gears, which can be solved by replacing the bearings or gears; if it happens at the barrel, it is because of hard foreign substances mixed in the material, and the extruder machine needs to be checked. When the material is clean, if necessary, install a strong magnetic device in the hopper to absorb iron filings.

Single Screw PET Sheet Extrusion Production Line maintenance

Since the electrical control system has high requirements for ambient temperature and dust prevention, the electrical system should be isolated from the production site and ventilation or ventilation fans should be installed. It is recommended to place the electrical control cabinet in a simple room to keep the room clean and Ventilate to keep the indoor temperature no higher than 40℃.

The single screw plastic sheet extruder is not allowed to run empty to prevent the screw and the machine from being rolled. When the host starts idling, it is not allowed to exceed 100r/min, when starting the host, start at a low speed. After starting the host, check whether there is any abnormal noise, and then slowly increase the speed of the host to within the allowable range of the process (it is better to adjust it to the best state). When the new machine is running in, the current load should be 60-70%, and the current during normal use should not exceed 90%. Note: If abnormal noise occurs when the extruder is running, it should be stopped immediately for inspection or repair.

When starting up, turn on the oil pump first, and then turn off the oil pump after turning off the machine. The water pump always remains in working condition during the entire production process and cannot be stopped to prevent failure. The asbestos fan cover of the main motor fan needs to be cleaned frequently to prevent excessive dust from clogging the windshield and causing the motor to trip due to insufficient heat dissipation.

Clean the dirt, tools and debris on the surface of the unit promptly.

Be careful to prevent metal or other debris from falling into the hopper to avoid damaging the screw and barrel. In order to prevent iron debris from entering the barrel, a magnetic component or magnetic frame can be installed at the feeding port of the barrel where the material enters. To prevent debris from falling in, the material must be screened in advance.

Pay attention to the cleanliness of the production environment, and do not let garbage and impurities mix into the materials to block the filter plate, which will affect the product output and quality and increase the resistance of the machine head.

The reduction gearbox should use the lubricating oil specified in the machine manual and fill it according to the specified oil level. Too little oil will result in insufficient lubrication, which will reduce the service life of the parts. Excessive oil will lead to high heat generation, high energy consumption, large oil loss, and also cause lubrication failure, resulting in damage to parts. For oil leakage parts of the reduction gearbox, the sealing gasket (ring) should be replaced in time to ensure the amount of lubricating oil.

Our Factory

Our factory covers an area of more than 5,000 square meters and has more than 300 employees.

Ultimate FAQ Guide to Single Screw PET Sheet Extrusion Production Line

Q: How Does A Single Screw Plastic Sheet Extruder Work?

A: The functioning of a single screw plastic sheet extruder revolves around the concept of heat, pressure, and mechanical work. It begins with the feeding of plastic granules into the hopper of the machine. These granules are then transported into the barrel of the extruder by the rotating screw(s). As the granules move along the barrel due to the rotation of the screw, they are subjected to high temperatures, usually between 150 and 275 degrees Celsius, depending on the type of plastic. This heat causes the plastic granules to melt into a molten state. The heat, combined with the mechanical work done by the screw, also helps to mix additives evenly throughout the plastic if they have been included. The screw then pushes this molten plastic towards the die at the end of the barrel. The die is a specially designed tool that shapes the molten plastic into the desired profile as it is extruded out of the machine. This extruded plastic is then cooled and hardened, typically through the use of water baths or cooling fans, to retain its shape.

Q: What Are the Advantages Of Using Single Screw Plastic Sheet Extruder?

A: Efficiency is a crucial benefit, single screw plastic sheet extruders can process large volumes of plastic material at a high rate, outperforming other molding methods by up to 20%. Versatility is another strength, different kinds of plastics, from PVC to polyethylene, can be processed using the same extruder. Moreover, modifications to the die allow for a wide range of shapes and forms to be produced. Cost-effectiveness is a third advantage, the high-speed nature of the single screw plastic sheet extruder reduces labor costs and increases production rates, resulting in lower per-unit costs. Finally, Environmental Impact should not be overlooked, the plastic extrusion process is more energy-efficient than other plastic molding methods, resulting in a smaller carbon footprint.

Q: How to Preventive Maintain Single Screw Plastic Sheet Extruders?

A: Preventive maintenance for single screw plastic sheet extruders is a systematic, proactive approach designed to minimize breakdowns and increase the longevity of your equipment. It's essential first to establish a regular maintenance schedule to monitor the machine's performance closely. This should be done by trained professionals who can identify early signs of wear or malfunction. Regular cleaning of the machine's components, especially parts like the hopper, barrel, and screw, is crucial in keeping the machine running at its optimal capacity. Lubricating moving parts will help reduce friction and consequent wear. Additionally, using thermal sensors to monitor the temperature continuously will help spot any anomalies in the cooling system. Finally, ensuring the calibration of the control systems, such as the temperature and pressure controls, can significantly enhance the machine's operational efficiency.

Q: What are the applications of single screw plastic sheet extruder?

A: Single screw plastic sheet extruders are used extensively in the plastics industry for melting polymers, incorporating additives (for example fillers, coloring pigments, stabilizers) and delivering a homogenized melt at high pressure to a die prior to shaping processes.

Q: What is compression ratio in single screw plastic sheet extruder?

A: The ratio of the feed zone channel depth to the meter zone channel depth, referred to as "compression ratio", typically ranges from 1.5:1 to 4.5:1 for most thermoplastic materials. Most injection screws classified as general purpose have a compression ratio of 2.5:1 to 3.0:1.

Q: Which is more efficient single-screw or twin screw propulsion?

A: The single-screw propulsion system shows a reduction in fuel consumption than the twin screw by around 19%. The developed model helps in the selection of a suitable propeller.

Q: Can Single Screw Plastic Sheet Extruders Produce Both Rigid And Flexible Plastic Sheets?

A: Yes, single screw plastic sheet extruders are versatile and can be configured to produce both rigid and flexible plastic sheets by adjusting the formulation of the plastic compound and the settings on the extrusion machinery. Flexible plastic sheet, often used for seals or gaskets in window and door profiles, can be produced by incorporating plasticizers in the compound. However, rigid plastic sheets are created using different formulations for structural applications like window frames or decking.

Q: How Do Single And Twin Screw Plastic Sheet Extruders Differ In Their Operation?

A: Single screw plastic sheet extruders operate with a solitary screw to process materials, whereas twin screw extruders employ two synchronized screws, enhancing the transport, melting, and mixing efficiency of materials.

Q: How to Operate A Single Screw Plastic Sheet Extruder?

A: Operating a single screw plastic sheet extruder involves a systematic procedure to ensure the efficient production of plastic products. It starts with loading the plastic pellets into the hopper, setting the machine's temperature controls, and turning on the heaters. As the plastic melts in the barrel, it is pushed through by the extruder screw towards the die. It's critical to ensure the temperature and speed of the extruder screw are correctly set to achieve the desired quality of the final product. Once the molten plastic passes through the die, it takes the required shape. It is then cooled and solidified in the cooling system, after which it is cut into the designated lengths by the cutter. It's worth noting that the smooth operation of a Plastic Extrusion Machine requires consistent monitoring and timely adjustments to maintain optimal production outputs and quality.

Q: What does a single screw plastic sheet extruder do?

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PET PP PS Plastic Extruder Machine

Single Screw PET Sheet Extrusion Line