What Is Extrusion Pelletizing System？Underwater Pelletizer?

The extrusion pelletizing system is actually extrusion machine with pelletizing line. It’s a production line that compounds materials like TPV, TPE, PA, PLA, PBAT, ABS, PET, PVC, PP, PE, TPU, EVA, PUR, POM, PEI, PC, PMMA, PBT, PPS, LDPE, etc.into pellets that will be used in many other manufacturing operations. The extrusion pelletizing system comes in many types but generally, it consists of a feeder, extruder, cooling component, pelletizer, and pellet container.

GTE 75D Underwater Pelletizing System

Types Of Underwater Pelletizing Equipment? How To Choose?

The extrusion pelletizing production line plays a crucial role in polymer compounding and pelletizing. Choosing a proper extrusion underwater pelletizing equipment is essential for your applications.

There are 6 different types of extrusion pelletizing equipment at Granuwel Extrusion. Granuwel Extrusion is a trusted underwater pelletizing equipment manufacturer & factory in China. We have more than 10 years of experience in providing customers with high quality extrusion pelletizing lines most suit their productions and applications.

If you don’t find your ideal extrusion pelletizing system, feel free to contact GRANUWEL! We’ll customize an extrusion pelletizing line that most fits your needs.

How to choose between these 6 Underwater Pelletizing Lines?

1. Air Cooling Hot Face Pelletizing System

Air Cooling Hot Face Pelletizing System is suitable for compounding with the following materials:

• PVC cable materials
• Medical PVC materials
• PVC sealing strips and shoe materials
• LLDPE PE high-filling blending
• low-smoke halogen-free cable material granulation
• PP PE-based WPC granulation
• degradable materials, etc.

For some heat-sensitive materials (especially PVC), it is necessary to use it in series with a single screw extruder, which separates the compounding and extrusion to better control the material temperature.

Advantages of Air Cooling Hot Face Pelletizing System

This system prevents hydrolysis and difficulties in drying that can occur when materials come into contact with water. It also allows for precise temperature control during cooling, which is essential for maintaining the integrity of the polymer chains.

Components of Cooling Hot Face Pelletizing System

The components of this pelletizing system are:

• Air-cooling hot-cutter
• Hot-cutting cover
• Cyclone system
• Vibrating screen
• Final product silo

For large-volume production, this pelletizing system will be equipped with boiling beds or water jackets in the air delivery system pipes to help rapid cooling equipment.

When Should You Choose This  Granuwel Air Cooling Hot Face Pelletizing System?

The Air Cooling Hot Face Pelletizing System should be chosen for materials that are heat-sensitive, water-reactive, or prone to hydrolysis, as it offers precise temperature control and prevents water contamination. This pelletizing line has low water consumption, is easy to operate, convenient to maintain, and has low repair costs.

2.Air Cooling Strand Pelletizing System

Suitable for PP-based filler masterbatch and WPC compounding granulation, PLA/PBAT biodegradable materials, and some engineering materials that are easy to absorb water, such as LCP. 

Air Cooling Strand Pelletizing System is suitable for:

• PP-based filler masterbatch and WPC compounding granulation,
• PLA/PBAT biodegradable materials
• and some engineering materials that are easy to absorb water, such as LCP.

Advantages of Air Cooling Strand Pelletizing Line

The advantages of this pelletizing method is to prevent the material from hydrolyzing or being difficult to dry when it encounters water.

This pelletizing system has high requirements for the cooling temperature of the strands: too low a temperature will produce excessive powder or unqualified particles, and too high a temperature will cause the strands to be flattened or even entangled in the pelletizer after entering the pelletizer. Therefore, it is necessary to equip it with a vibrating sieve.

Components of Air Cooling Strand Pelletizing Line

The components of this pelletizing system are:

• Die head
• Air-cooling conveyor belt
• Cold pelletizer
• Vibrating sieve
• Final product silo

When Should You Choose This Granuwel Air Cooling Strand Pelletizing Line?

It is mainly used for compounding and pelletizing of materials with high polymer viscosity and high melt index. Almost all polymers that cannot be cooled with water can be pelleted with this method. This machine has low water consumption, is easy to operate, convenient to maintain, and has low repair costs.

3.Underwater Pelletizing System

Underwater pelletizing system is suitable for pelletizing of most polymers. Especially used for all elastomer materials such as

• EVA
• TPE
• TPV
• TPU
• Micro particles (sand with a diameter of about 1mm)

Advantages of Underwater Pelletizing System

Compared with other pelletizing systems, it features a compact structure, beautiful particle shape, a high degree of automation, large output and other obvious characteristics.

Components of Underwater Pelletizing System

Its main components are

• Driving valve system
• Die head of the template system
• Pelletizer system
• Water tank and heating system
• Centrifugal hydroextractor system
• Vibrating Sieve and final Product silo

For large output, it can be directly configured with an automatic weighing and packaging system.

When Should You Choose This Granuwel Underwater Pelletizing System?

This extrusion pelletizing line makes up little space. It offers material versatility, suitable for processing a wide range of polymers, including elastic materials like TPE and TPU, which benefit from rapid cooling and uniform pellet shape. With PLC control and one-touch start, it is easy to operate and is the top choice for high-output granulation. The machine features a high degree of automation and is equipped with various terminal interfaces for remote monitoring and control.

4.Water flushing strands pelletizing system

Under Water Strand Pelletizing System is suitable for recycling and granulation of dirty raw materials. As to the raw materials are dirty, the screen changer needs to be replaced many times.

Advantages Of 4.Water flushing strands pelletizing system

Its advantage is that the material strands automatically enter into the pelletizer under the traction of the water flow, so that the strips will not be broken when the screen changer is replaced, reducing material waste.

Components of4.Water flushing strands pelletizing system

Its main components are

• Cartridge screen changer with a large filtration area
• Die head
• Cooling water tank
• Pelletizer with a full stainless steel structure
• Dehydrator, etc.

When Should You Choose This Granuwel Water Flushing Strand Pelletizing System?

The Granuwel Water flushing strands pelletizing System should be chosen for processing recycled or contaminated materials that require frequent screen changes. This system is designed to handle dirty raw materials recovery and granulation efficiently, automatically directing material strands into the pelletizer to reduce wastage and ensure continuous operation. With a cartridge screen changer featuring a large filtration area, it allows for efficient filtering and easy screen changes without interrupting the process. This system is particularly suitable for recycling applications and processing materials that may contaminate the equipment, as it facilitates quick and frequent maintenance.

5.Water Cooling Strand Pelletizing System

Water Cooling Strand Pelletizing System is suitable for most polymer extrusion, especially for various color masterbatches and modified granulation of high-temperature engineering plastics.

Advantages Of Water Cooling Strand Pelletizing System

The Water Cooling Strand Pelletizing System is advantageous due to its rapid cooling, which enhances product quality and reduces thermal degradation. It boosts production rates, making it suitable for large-scale use. Its design simplicity facilitates easy maintenance and operation, while also making barrel cleaning more accessible. The system also has low operator skill requirements.

Components of Water Cooling Strand Pelletizing System

Its main components are

• Strands die head
• Water tank
• Dryer
• Pelletizer
• Vibrating sieve, etc.

When Should You Choose This Granuwel Water Cooling Strand Pelletizing System?

This extrusion pelletizing system is used for high-concentration color masterbatches and CaCO3 masterbatches, blending and granulating color masterbatches. It produces less waste, is easy to operate, and requires a low labor force. The granules are uniform in size and have a good shape.

6.Water Ring Hot Face Pelletizing System

Advantages Of Water Ring Hot Face Pelletizing System

The Water Ring Hot Face Pelletizing System is advantageous due to its efficient cooling, which enhances product quality and reduces thermal degradation. It boosts production rates, making it suitable for large-scale use. The system’s design simplicity facilitates easy maintenance and operation, while also ensuring good final particle appearance.

Components of Water Ring Hot Face Pelletizing System

Its components include

• hot cutting die head
• pelletizer
• centrifugal dehydrator
• vibrating sieve, etc.

When Should You Choose This Granuwel Water Ring Hot Face Pelletizing System?

This Granuwel extrusion pelletizing equipment is suitable for large-scale productions requiring rapid cooling to enhance product quality, particularly for heat-sensitive materials. It offers consistent pellet size and shape, is simple to operate, and has low maintenance costs. This system is also suitable for the compounding, modification, and granulation of most polymers.

Feel free to contact Granuwel Extrusion when you have problems in finding suitable extrusion pelletizing production line.