Why Are Granules Produced by Pelletizing Machine Plastic Hollow?

Pelletizing machine plastic is a common industrial equipment used to process waste plastic into granular materials for subsequent processing or reuse. However, in the process of plastic granulation, the phenomenon of hollow granules sometimes occurs, which affects the quality and application of granules. In this article, we will analyze the reasons for the hollow granules and propose corresponding solutions, and at the same time introduce you to a good quality and low-price plastic granulator.

Causes of hollow granules

Improper temperature control

In the production process of pelletizing machine plastic, temperature control is one of the important factors affecting the quality of granules. If the temperature is too high or uneven, it will lead to insufficient melting of the pellets in the formation process, thus causing the pellets to be hollow.

Unstable extrusion pressure

Unstable extrusion pressure can result in the plastic material not escaping gases easily during the extrusion process, resulting in the formation of hollow pellets. This can be caused by factors such as pelletizing machine plastic failure, poor material flow, or an unstable extrusion mechanism.

Material quality problems

The use of plastic raw materials of inconsistent quality or containing inappropriate additives may result in hollow pellets. Undesirable raw materials may produce air bubbles or an uneven melt state, which can affect the denseness of the pellets.

Solutions for hollow plastics

Optimize temperature control

Reasonably set the temperature of the heating zone of the pelletizing machine plastic to ensure that the plastic material is fully melted and to avoid excessive high or low temperatures. In addition, adopting gradual temperature rise and fall will help reduce the occurrence of pellet hollowing.

Stabilise extrusion pressure

Regularly check the condition of the pelletizing machine plastic to ensure its stable operation. Adjust the extrusion pressure and extrusion speed according to different plastic materials to prevent gas from being trapped in the extrusion process.

Choose high-quality raw materials

Select stable and reliable quality plastic raw materials, and avoid using raw materials with excessive adulteration. Carry out raw material pre-treatment to ensure that the impurities and air bubbles in the raw material are effectively removed.

Shuliy pelletizing machine plastic for sale

Shuliy plastic pelletizer is highly regarded in the market for its superior technology and high-quality pellet production capacity. Its advantages include:

• Advanced temperature control system: Shuliy pelletizing machine plastic is equipped with an advanced temperature control system that precisely controls the melting temperature. It ensures uniform melting of pellets and avoids the problem of hollow pellets.
• Optimized barrel design: Shuliy’s barrel design is carefully optimized to ensure even distribution of the plastic material. This results in uniform extrusion pressure during the extrusion process and reduces the risk of pellet hollowing.
• Customized screw design: Shuliy offers customized screw designs according to the characteristics of different plastic materials. This ensures stable extrusion pressure during the extrusion process, effectively preventing the occurrence of pellet hollowing problems. If you also want to take advantage of such an excellent machine to improve your plastic recycling efficiency, please contact us now.