Plastic Pellet Making Machine for PP LDPE HDPE Recycling

A plastic pellet making machine is a recycling machine for extruding, cooling, and dicing polyethylene (plastic film, lining bag, etc.) or polypropylene (old woven bag, packing bag, tying rope, etc.). It is also called a plastic granulator machine. Plastic granulator machine plays important roles in the plastic recycling granulating line and has a high market value. Therefore, if there is plenty of waste plastic in your place and you want to make a profit from them, you can choose Shuliy plastic pelletizer.

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HDPE pelletizer sent to Saudi Arabia PP film pelletizing machine shipped to Kenya PP granules making machine sent to Ghana HDPE granules making machine sent to Congo

Plastic pellet making machine introduction

This plastic recycling pellet machine is matched with the crushing and cleaning machine and the pellet cutter. Broken and cleaned plastic can be directly put into extrusion granulation. Simple process, advanced technology, and is suitable for different waste plastics.

Waste plastic granules making machine adopts automatic temperature control and electromagnetic heating, with less electricity, no pollution, and high automation.

plastic pelletizing machine

Plastic granules manufacturing process

Raw materials and final product of plastic pelletizer machine

The plastic pellet making machine's applicable raw materials include PP and PE plastic films, cement bags, and plastic hard sheets. Before pelletizing, the plastic waste needs to be crushed into small pieces by a plastic crusher. They can be melted and extruded by the plastic extruder. In order to guarantee the quality of the plastic pellets, different materials cannot be mixed. If you have EPS or EPE foam, we also provide related plastic foam granulator.

Read more:

plastic films used HDPE bottle recycled plastic pellets

Features of plastic pellet making machine

1. The plastic pelletizer machine adopts a special screw design and different configurations. The plastic pelletizing system is suitable for the production of different kinds of plastics for regeneration and color-mixing granulation.
2. The high-torque design of the gearbox achieves smooth performance without noise.
3. The screw and barrel are specially hardened, with wear resistance, good mixing performance, high output characteristics, vacuum exhaust, or ordinary exhaust port design, which can remove moisture and exhaust gas during the plastic granules manufacturing process.
4. Our pelletizers are more stable, the particles are stronger, ensuring good quality.
5. The plastic recycling pelletizing machine can process 2-30 tons of waste plastic per day. These plastic scrap are processed into pellets of various colors and then used in various industries.
6. Combined with balers and bale openers for large plants, it meets the highly automated needs of large recycling plants.

Granules manufacturing machine in plant mould head of plastic pelletizer machine

Energy-saving of plastic recycling pelletizer machine

The main and auxiliary machines are integrated, the installation is simple, the footprint is small, and the performance and price ratio are outstanding. This equipment uses the principle of high-pressure friction uninterrupted heating and uses a multi-function heating mode, and is equipped with a constant temperature system.

The plastic pelletizer machine does not require continuous heating and reduces energy consumption by 30%-40%. Reasonable design of an automatic process for the waste plastic granules machine. Cleaning, crushing, feeding, and pelletizing mechanized flow which is easy to operate for one or two people.

Structures of mother baby double stage extruder machine

This plastic pellet making machine is mainly composed of a feeding port, single screw press, press chamber, heating device, discharge port, mold head, reducer, machine body, base, motor, and other parts. Two-stage is the most common model for recycling plants. According to its structure, we always call the pelletizer a mother-baby double-stage single-screw extruder.

• Screw: It is the most important part of the extruder. Because the pelletizer screw is directly related to the application range and production efficiency. Shuliy mother baby double stage extruder screw is made of high-strength corrosion-resistant alloy steel, which is good enough for most recycling plants.
• Barrel: The pelletizing barrel is a seamless metal tube, it is made of alloy steel, heat-resistant, pressure-resistant high strength and solid.

Shuliy pelletizing barrel and screw with the realization of the plastic crushing, softening, melting, plasticizing, exhaust and compaction. Generally, the length of the barrel is 15:1 of its diameter, so that the plastic can be fully heated and melted.

This plastic extrusion pelletizer is the main plastic recycling machine of the plastic recycling pelletizing line and can handle a variety of materials. But the recycling machines that handle different materials are not the same. Their appearance is similar, but the diameter of the internal screw, the distance between the screw and the barrel wall, and the length of the screw are all different. They all need to be adjusted according to the material. Therefore, one recycling machine cannot handle multiple materials.

mother baby double stage extruder structure

How does plastic granules manufacturing machine work?

A plastic recycling granulator is used to melt and extrude plastics of various materials. The extruded plastic is cooled and cut into plastic particles. These particles can be used for secondary production to make new plastic products.

1. First, turn on the plastic granules making machine.
2. Secondly, observe the operation of the granules machine, and put it into use after there is no abnormal sound or vibration.
3. Before use, it is necessary to preheat the recycling machine so that it can melt the plastic. If the temperature is too high, the melted plastic will turn black; if the temperature is too low, the plastic will not melt.
4. Put the crushed material into the feeding port of the plastic granulator machine, and add a forced feeder for plastic film material to prevent the recycling machines from not feeding.
5. The material melts in the squeezing chamber and is pushed out continuously along with the squeezing screw. The material from the main engine will enter the auxiliary pelletizer again for secondary melting and extrusion.
6. The material from the outlet can be put into the cooling tank for cooling and cut into small granules by a pellet cutter machine. Shuliy also provides water ring pelletizers.

Video: How does a plastic granulator work?

Parameters of plastic pellet making machine

The following models are the hot sale ones, the model of the plastic granules making machine is named by their screw diameter. If you don't know how to pick the model, welcome to consult us.

ModelSL-125SL-150SL-180Screw diameter125mm150mm180mmMain shaft speed50-70min40-60min40-50minMain motor22+1.5lw30+1.5kw45kwCapacity3t/day5t/day7t/day/ 24hbasic granules making machine parameters

Extrusion pelletizing system

(1)Screw

The screw is the main part of the plastic pelletizng system. The quality of the screw is directly related to the application range and efficiency of the plastic extruder. The screw is made of high-strength corrosion-resistant alloy steel.

screws and sleeves reducer for plastic pellet making machine

(2)Barrel

A barrel of a plastic pellet making machine refers to a metal cylinder that is made of alloy steel or composite steel pipe lined with alloy steel. This steel has the characteristics of high heat resistance, high compressive strength, Strong wear-resisting, and corrosion resistance.

The barrel is used in conjunction with the screw to achieve pulverization, softening, melting, plasticizing, venting, and compacting of the plastic. It also conveys the rubber to the molding system continuously and uniformly. Generally, the length of the barrel is more than 15 times its diameter. The main function of it is to make the plastic fully heated and fully plasticized.

plastic recycling machine structure

(3)Hopper

A cutting device is installed at the bottom of the hopper to adjust and cut the material. The side of the hopper is equipped with a sight hole and a calibration metering device.

(4)Die head

The die head of the plastic granules making machine has three types, including an electric gear die head, hydraulic die head and automatic slag filter. The function of the machine head is to transform the rotating plastic melt into a parallel linear motion so that the plastic melt is introduced into the mold sleeve evenly and smoothly, and the plastic is given the necessary pressure for molding.

A split sleeve is usually placed to ensure that the plastic flow path in the recycling machine head is reasonable and eliminates the dead angle where the plastic accumulates. Besides, a grading ring is usually also provided to eliminate pressure fluctuations during plastic extrusion. Mold calibration and adjustment devices are also installed on the machine head to adjust and correct the concentricity of the core and the mold sleeve.

electric gear die head hydraulic die head automatic slag filter

Transmission system of PP PE granule extruder

The function of the transmission system of the plastic granulator machine is to drive the screw. It also can provide the torque and speed required for the screw during the extrusion process. In general, the drive system consists of a motor, a reducer, and bearings.

Heating device of plastic pellet making machine

Heating is an important condition for plastic granulation processes. Shuliy plastic pelletizer can provide three different heating methods.

Heating device

Plastic pellet making machine is generally heated by electricity which is divided into resistance heating and induction heating. The heating piece is distributed in the machine body and the parts of the plastic pelletizer machine's head. The heating device heats the plastic in the cylinder from the outside, and the heated plastic is in a liquid state, which is convenient for processing.

There are mainly three heating methods for plastic recycling machines. They are electromagnetic heating, ceramic heating, and iron heating. Customers can choose different heating devices according to their demands. Also, customers can consult our sales manager about choosing heating methods.

electromagnetic heating ceramic heating device Iron heating device

Cooling device

The cooling device is set to ensure that the plastic is in the temperature range required by the process. Specifically, it is to eliminate the excess heat generated by friction when the screw rotates. It can avoid too high temperatures producing some problems, such as plastic decomposition, plastic burning, or plastic molding difficulties.

Why is plastic granules making machine so popular?

Plastic pollution has always been a worrying issue for people around the world. As a convenient material, plastic brings convenience to the public and brings us a huge safety problem. Waste plastic contains toxic substances. If burned, they will be detrimental to the air. If buried, they will influence the quality of the groundwater.

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If the waste plastic is not properly disposed of, it is likely to result in a large-scale disaster. The plastic recycling pellet machine plays an important role in the environmental problem. Professional equipment can reuse some of the plastic waste to reduce the risk of air and water.

Why choose Shuliy plastic pellet making machine?

A good plastic pelletizer is very important for the whole recycling, which influences the quality of the final plastic pellets. Therefore, how to choose a good machine is worth to be considered.

•  Reducers, die heads, and motors of Shuliy granulator machines are all the highest equipment currently on the market.
•  Our plastic recycling pellet machine can be customized according to customer requirements or raw materials. Such as the diameter of the screw press, the heating method, the die, the material of the screw press, etc.
•  Our company has rich production experience in plastic recycling. There are many different plastic materials on the market. Many plastic granulator manufacturers do not understand the material, and mistakenly believe that all the internal structure of the machine is the same. So the machine-made seriously affects the output and quality of the final product.

How does the peculiar smell come from when the plastic pelletizer is granulating?

The old customers who bought our plastic recycling pellet machine have reported to us that there is a strange smell after the waste plastic granulator is granulated. Is the machine damaged? Is this smell harmful to the body? What is the main reason? After experiments and research on this problem, our factory has discovered the cause of the peculiar smell of the plastic granulator.

Plastic pellet making machine shipped to Ghana

Congratulations! Our company has exported a set of plastic pelletizing machines to Ghana. The customer in Ghana bought our plastic pelletizer machine for recycling waste plastic film. Our sales manager Sunny introduced them to our plastic pelletizer and the suitable heating method.

Finally, the customer chose the main pelletizer to be heated with the ceramic heating method and the second pelletizer to be heated by a heating coil.

packed plastic granulator plastic pelletizer

Plastic granules machine sent to Germany

Germany is one of the best countries in the world in waste separation and recycling, with a world-leading waste recycling rate of about 65%. Encouraged by the national policy, our German customer decided to start a plastic recycling business last year, mainly recycling some waste plastic films and so on. Therefore, he started to invest some plastic recycling machines.

After looking at our website, the customer contacted the account manager and finally chose our plastic pellet making machine. In addition, they bought the whole plastic recycling line, including plastic crusher, pellet cutter and storage bin.

Read more successful stories of our global clients:

crusher and cutter of plastic recycling granulating line in Germany plastic pellet making machine

Inquires for plastic granules manufacturing machine

To acquire the latest plastic granules manufacturing machine price, send us a message by using the form on our website.

Our project manager will send you the machine details & price in 24 hours.

In the process of plastic recycling and reuse, plastic pellet machine plays an important role as a key equipment. It realizes the recycling of resources by processing waste plastic into pellets. This article will discuss the working principle of plastic pellet machine in detail, covering its components, workflow and influencing factors, in order to better understand this important equipment.

Components of Plastic Pellet Machine

Plastic pellet machine mainly consists of the following parts, each of which has its unique function in the working process:

1. Feeding system: responsible for feeding the cleaned plastic waste into the pellet machine. Usually spiral feeding or gravity feeding is used to ensure that the raw materials enter the next link evenly.

2. Plastic crusher: Before entering the pellet machine, the plastic waste needs to be crushed into smaller particles for subsequent processing. The crusher breaks up large pieces of plastic waste and reduces its volume by rotating the blade.

3. Plastic extruder: This is the core part of the plastic pellet machine. The extruder consists of a heated screw and barrel, where the plastic is heated to a molten state. Through the rotation of the screw, the molten plastic is pushed into the mold.

4. Plastic pulling machine: The design of the plastic pulling mold determines the shape and size of the final pellets. When the molten plastic passes through the mold, it cools to form plastic strips.

5. Cooling system: After the plastic strip is extruded from the mold, it needs to be cooled to harden it. Usually water cooling or air cooling is used for cooling.

6. Cutting machine: The cooled plastic strips are cut into uniform pellets for subsequent packaging and transportation.

7. Control system: Modern plastic pellet machines are equipped with intelligent control systems that can monitor temperature, pressure and speed in real time to ensure the stability and efficiency of the production process.

The Workflow of Plastic Pellet Machines

The workflow of plastic pellet machines can be divided into several main steps, each of which is an important link to ensure the quality of the final product:

1. Raw material preparation: First, the plastic waste needs to be cleaned to remove impurities and moisture. The cleaned waste is fed into the feeding system.

2. Crushing: In the crusher, the waste is cut into small pieces by blades. This process ensures the smooth progress of subsequent processing.

3. Melt extrusion: The crushed plastic pellets enter the extruder. The heated screw melts the plastic at high temperature and pushes the molten plastic into the mold through the rotation of the screw.

4. Molding: The molten plastic passes through the mold and forms a continuous plastic strip after cooling. The design of the mold determines the shape and size of the pellets, which are usually cylindrical or granular.

5. Cooling: The plastic strips are quickly cooled in the cooling system and reach a hardened state. The cooling method usually affects the quality of the final pellets.

6. Cutting: The cooled plastic strips are cut into uniform small pellets by a cutting machine. These pellets are the final product, ready for packaging and transportation.

7. Inspection and packaging: Finally, the pellets are inspected to ensure that their quality meets the standards, and then packaged and ready for delivery to customers.

Factors Affecting The Working Efficiency Of Plastic Pellet Machines

During the operation of plastic pellet machines, multiple factors will affect its working efficiency and product quality, mainly including:

1. Raw material properties: Different types of plastics have differences in melting temperature, fluidity, etc. Understanding the properties of raw materials and choosing the right temperature and pressure are the keys to ensuring production efficiency.

2. Temperature control: The temperature setting of the extruder is crucial. Too high a temperature may cause plastic degradation, while too low a temperature will affect the melting effect. Reasonable temperature control helps improve product quality.

3. Screw design: The design of the screw has a direct impact on the mixing, melting and conveying process of the plastic. A suitable screw design can improve extrusion efficiency and reduce energy consumption.

4. Cooling speed: The design of the cooling system also affects the quality of the pellets. Too fast or too slow cooling will result in uneven shape and strength of the pellets.

5. Cutting accuracy: The accuracy of the cutting machine directly affects the uniformity of the final plastic pellets. Accurate cutting can ensure product quality and enhance market competitiveness.

Maintenance And Maintenance of Plastic Pellet Machines

In order to ensure the long-term and stable operation of the plastic pellet machine, regular maintenance and maintenance are essential. Mainly include:

1. Regular cleaning: During the production process, plastic residues will accumulate inside the machine, and regular cleaning helps prevent blockage and equipment damage.

2. Lubrication system inspection: The screw and transmission system need to be regularly refueled to ensure normal operation and reduce wear.

3. Temperature monitoring: Regularly check the temperature control system to ensure that the heater and sensor are working properly to prevent abnormal temperature.

4. Tool maintenance: The blade of the cutting machine needs to be replaced or sharpened regularly to ensure cutting quality.

5. Equipment inspection: Regularly inspect the equipment, find potential problems and deal with them in time to avoid downtime.

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