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die roller pellet machine


The die roller pellet machine is a device that actively compresses powder or granular materials between two rollers to form various shapes of pellets

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die roller pellet machine Introduction

The die roller pellet machine is a device that actively compresses powder or granular materials between two rollers to form various shapes of pellets. It primarily comprises a feeding system, an extrusion system, roller shafts, and pressing rollers. Its operational principle involves guiding the raw materials through the feeding system into the compaction zone, where they undergo extrusion between two rotating roller shafts. Throughout the compaction process, the materials endure high pressure, gradually molding into granules. Control over the size and shape of the granules is achieved by adjusting the gap between the pressing rollers and the speed of the roller shafts. Finally, the granules are discharged through the outlet and may undergo subsequent processing such as drying, cooling, and screening as necessary.

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Characteristics of die roller pellet machine

High production efficiency

The die roller pellet machine achieves high productivity by extruding the raw materials into the die holes, making it suitable for large-scale production.

High forming rate

Due to the operational principle of the die roller pellet machine, it boasts a high forming rate and produces pellets of excellent quality.

Strong adaptability

The die roller pellet machine exhibits good adaptability to various raw materials, including but not limited to wood chips and straw.

Simple structure

The flat die pellet machine has a simple structure, making it easy to operate and maintain.


The flat die pellet machine has low energy consumption and costs, making it suitable for small-scale production and rural use.

Wear issues

The die roller pellet machine’s vulnerable parts, such as the die and pressing rollers, wear out quickly and require regular replacement.

Die hole blockage

The die roller pellet machine may encounter issues with die hole blockage during production, affecting production efficiency and product quality.

Specialization level

While pelletizing machine technology is mature overseas, its adaptability to specific materials such as straw still needs improvement.

Energy consumption issues

Compared to foreign counterparts, domestic pelletizers have relatively higher energy consumption, and reducing energy consumption is one of the key directions for future research.

Easy maintenance

Some advanced pellet machines are designed with considerations for easy maintenance, such as automatic adjustment systems and easily replaceable components.

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Structure of die roller pellet machine

Feeding system

This system is responsible for transporting the raw materials to the compaction area and typically includes a feed hopper, conveyor belt, or screw conveyor.

Compaction system

This includes the compaction area and the pressing device, which are used to form the granules under the pressure of the dual rollers. This part usually comprises roller shafts, pressing rollers, and dies.

Discharge system

This system is responsible for ejecting the formed pellets and typically includes an outlet and discharge device.

Transmission system

This system drives the rotation of the roller shafts and typically includes a motor, gearbox, belt drive, etc.

Control system

This system controls the operation status and parameters of various components of the die roller pellet machine and typically includes an electrical control cabinet, control panel, etc.

Support structure

This structure supports and fixes various components of the die roller pellet machine and typically includes a frame, support feet, etc.

Advantages of die roller pellet machine

High production efficiency

It forms pellets through dual roller extrusion, enabling fast production suitable for large-scale operations.

High product quality

The even pressure applied during extrusion ensures high pellet uniformity and stability in quality.

Strong adjustability of particle size

Particle size and shape can be controlled by adjusting roller shaft speed and pressing roller gap to meet various requirements.

Wide adaptability

It can handle various powdered or granular materials, showing strong adaptability.

Simple structure

Its relatively simple structure facilitates easy operation and maintenance.

Energy-saving and environmentally friendly

It employs mechanical extrusion without the need for additional adhesives or solvents, promoting energy efficiency and environmental protection.


Compared to other pellet manufacturing equipment, the die roller pellet machine has lower energy consumption and operating costs.

Continuous production

It is suitable for continuous production operations, enhancing production efficiency.

Classification of biomass pellet machines

The biomass pellet machine is a device that processes materials such as paulownia, cypress, poplar, fruitwood, agricultural crop straw, bamboo shavings, etc., by crushing them into sawdust-like bran and then processing them into biomass fuel.

Due to variations in raw materials used in different regions, the biomass pellet machine is known by different names such as wood pellet machine, straw pellet machine, sawdust pellet machine, wood chip pellet machine, bamboo pellet machine, fuel pellet machine, rice husk pellet machine, etc. It is also referred to as a pelletizer or pellet maker. Despite the differences in terminology, they all refer to the same type of machine.

Based on the type of die used, it can be further categorized into flat die pellet machine and ring die pellet machine. The ring die pellet machine can be further classified into vertical ring die pellet machine and horizontal ring die pellet machine.

According to the working principle of the feed pellet machine, it can be classified into die roller pellet machine and screw extrusion pellet machine. According to the purpose of the feed pellet machine, it can be classified into single-feed pellet machine and mixed-feed pellet machine.

Parameter of biomass pellet machines

Model Capacity Main Motor Power Feeder Motor Power Conditioner Power Dia. of Ring Die Pellet Size
SZLH250 1-2T/H 22KW 0.75kw 1.5kw 250mm 2-12mm
SZLH320 3-4T/H 37KW 1.5kw 2.2kw 320mm 2-12mm
SZLH350 5-7T/H 55KW 1.5kw 3kw 350mm 2-12mm
SZLH420 8-12T/H 110KW 1.5kw 7.5kw 420mm 2-12mm
SZLH508 10-18T/H 160KW 2.2kw 11kw 508mm 2-12mm
SZLH558 15-25T/H 180KW 2.2kw 11kw 558mm 2-12mm
SZLH678 20-30T/H 220KW 2.2kw 11kw 678mm 2-12mm
SZLH768 25-42T/H 280KW 2.2kw 11kw 768mm 2-12mm

After-sale Service

  • – HKB provides advanced grain safety storage technology to assure your grain silo 100% quality stability.
  • grain silo Quality guarantee is one year after installation and commissioning or 18 months after leaving China Port. Maturity is the first.
  • – 7 days x 24 hours service, within 24 hours reply/solve of any technical issues upon request.
  • – Routinely telephone track to remove all might be problems grain silo or issues guarantying the whole system grain silo long-lasting safety and reliability.
  • – HKB will consider all other needs like customs clearance, sea delivery, insurance, customs tax benefit plan, documentation, etc. So our respected Users feel so relaxed and easy to get the grain silo system well.
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