The HQ-100 Double Stage recycling Pelletizing Extrusion Machine is an advanced, high-performance solution specifically designed for the efficient recycling and pelletizing of various plastic waste materials. Engineered to process a wide range of plastics, including ABS, PC, PP, PE, PVC, HIPS, TPU, and PC/ABS, this two-stage pelletizer excels at converting plastic scrap and defective products into high-quality granules.

Ideal for industries committed to sustainability and waste reduction, the HQ-100 ensures reliable performance, high production efficiency, and superior quality output. As a leading manufacturer of plastic recycling equipment in China, we are dedicated to delivering innovative, energy-efficient solutions tailored to the evolving demands of modern recycling operations.

The Double Stage Recycling Extruder greatly improves recycling efficiency and the quality of plastic granules, while minimizing energy consumption and emissions. It plays a vital role in supporting sustainable plastic recycling practices.

Double Stage Recycling Extruder Infomation：

Double Stage Recycling Extruder Features

More Uniform Melting

One of the most critical advantages of the dual-stage extrusion process is its ability to ensure more uniform melting. Unlike traditional single-stage extruders, the dual-stage system operates with a two-step melting approach, ensuring that the material is evenly melted and plasticized. 

Precise Control of Pressure and Temperature

Another standout feature of the dual-stage process is its ability to provide precise control over both pressure and temperature. The Double Stage Recycling Extruder is designed to fine-tune these crucial factors, allowing for adjustments that ensure optimal processing conditions throughout the pelletizing process. Maintaining the correct pressure and temperature is essential for producing pellets that are consistent in size, shape, and overall quality. 

Efficient Degassing

Moisture and trapped gases in the raw material can significantly affect the quality of the finished plastic pellets, leading to defects like bubbles, voids, or weakened structural integrity. The Double Stage Recycling Extruder system effectively addresses this issue with its efficient degassing capabilities.

Double Stage Recycling Extruder Main Extruder

• Screw Diameter: Φ100*P100/90; L/D : 30

• Motor Power: 75KW (Global Brand)

• Temperature Control: 5-point temperature control

• Secondary Stage Extruder

• Screw Diameter: Φ120mm; L/D : 10

• Motor Power: 22KW (Global Brand)

• Temperature Control: 3-point temperature control

Double Stage Recycling Extruder Cooling System

Includes a 1.5KW suction motor with a stainless steel cooling water tank (4000*360*220mm)

Die Head: Hydraulic with 4*17 holes in the secondary stage extruder

Cutting Machine: Equipped with SKD-11/tungsten steel rotary blades, featuring 28 blades, powered by a 5.5KW motor with variable frequency control

Vibrating Screen Machine (HQ-1000 model): Includes two 90W vibrating motors and a 2.2KW blower motor, built with 3-layer 304# stainless steel, and a capacity of 500KG per cycle

Where can us use the Double Stage Recycling Extruder

Consumer Goods Manufacturing

Many consumer goods, such as household items, furniture, toys, and electronics, involve the use of recycled plastic. The Double Stage Recycling Extruder ensures consistent quality and is ideal for reprocessing plastic waste into granules that can be used in the production of various consumer products.

Agriculture Sector

Plastic recycling is critical in the agriculture industry, where plastic waste from irrigation pipes, greenhouse films, and nets can be recycled using these Double Stage Recycling Extruders. The recycled pellets are used to produce new agricultural products, reducing waste and supporting sustainability in farming practices.

Textile Industry

Recycled plastic, especially PET, is often processed through double stage recycling pelletizing extrusion machines to create polyester fibers, which are then used in the production of textiles, clothing, and non-woven materials. This process helps turn plastic waste into valuable resources for the textile industry.

Medical Industry
In the medical field, recycled plastics are used for producing packaging and single-use items. Double stage recycling pelletizing extrusion machines ensure that medical-grade plastic waste is processed into high-quality granules that meet industry standards for reuse.

Working Principle of the Double Stage Recycling Extruder

First Stage: Initial Melting and Plasticizing

In the first stage, raw materials are introduced into the primary extruder, which can either be a single or twin-screw system. As the screw rotates, it generates mechanical shear and applies external heating to gradually melt the plastic. This thorough melting process results in a uniform, molten plastic mass. The combination of mechanical shear and heat ensures that even materials with varying properties are fully plasticized. During this stage, the molten plastic passes through a filtration system to remove impurities, enhancing the overall quality of the material before it proceeds to the next phase.

Second Stage: Further Melting and Pressure Control

Once the molten plastic exits the primary extruder, it enters the secondary extruder, typically a single-screw system. This stage is focused on refining the melt by reducing its temperature and stabilizing any pressure fluctuations that might affect the quality of the final product. The secondary extruder operates at a slower speed, allowing for precise control over cooling and pressure. This controlled environment ensures consistent plasticizing, which is crucial for producing pellets of uniform quality. Additionally, the secondary extruder is equipped with a degassing system to remove any remaining moisture or volatile compounds, further improving the integrity and durability of the final pellets.

Pelletizing and Cooling

After the plastic has been processed through the second stage, it is extruded through a die to form strands or other shapes, depending on the desired pellet size and design. These extruded strands are then cut into pellets, which are subsequently cooled using air or water. This cooling step solidifies the pellets, stabilizing their shape and ensuring they maintain uniformity. The result is a batch of high-quality plastic granules, ready for use in a variety of applications.

Double Stage Recycling Extruder FAQ?

1. What industries use Double Stage Recycling Extruders?

Industries that benefit from these machines include plastic recycling plants, packaging manufacturers, automotive parts production, and companies involved in producing household goods. It is ideal for businesses aiming to reduce plastic waste and promote sustainability.

2. How does a Double Stage Recycling Extruder improve plastic recycling?

This machine enhances recycling by offering more thorough processing, filtering, and pelletizing of contaminated plastics. The Two-Stage Plastic Pelletizing Machine degasses and filters impurities, producing high-quality pellets that can be reused in a variety of manufacturing applications.

3. What is the difference between single-stage and Double Stage Recycling Extruder?

The primary difference is that the Double Stage Recycling Extruder provides an additional step for degassing, filtering, and processing highly contaminated plastics. Single-stage machines are simpler but may not deliver the same quality results for dirty or mixed plastic waste.

4. What are the maintenance requirements for a Double Stage Recycling Extruder?

Regular maintenance involves cleaning the extruders, checking the filters, and ensuring the pelletizing blades remain sharp. Proper lubrication and periodic inspection of the heating elements and motors will help maintain efficiency and prevent breakdowns.