Shantou Hetian Machinery Manufacture Co.,Ltd

There are significant differences in functionality, structure, and application scenarios between plastic dryers and hybrid dryers. Plastic drying machines focus on removing moisture from plastic materials with a single drying core. For example, hot air drying machines use hot air circulation to penetrate PP, PE and other granular materials to remove moisture, while dehumidification drying machines use systems such as molecular sieves to process engineering plastics with strong moisture absorption properties such as PA and PC, ensuring that the dryness of the materials meets the requirements of injection molding, extrusion and other processing, but the materials are basically not mixed during the process.

The mixed dryer integrates mixing and drying, completing dehydration while uniformly stirring multiple materials. For example, the screw belt mixed dryer uses the screw belt in the U-shaped groove to push the material up and down, heats the jacket with ventilation and dehumidification, and is suitable for synchronous treatment of color masterbatch, main materials, calcium carbonate and other additives; The plow blade type machine uses high-speed stirring to crush clumped materials, with a mixing uniformity of over 95%, making it particularly suitable for scenarios such as modified plastic formula debugging that require uniform mixing of multiple components.

From a structural perspective, plastic dryers are often equipped with hoppers and heating and air supply systems, allowing materials to be stationary or simply flipped. For example, vacuum dryers reduce the boiling point of water through negative pressure, making them suitable for heat sensitive plastics; A mixing dryer must be equipped with a stirring device, such as a double cone rotary dryer that relies on the rotation of the cylinder to make the material roll, while achieving dual functions through cylinder wall heating and vacuum system. Its stirring intensity directly affects the mixing and drying efficiency.

In terms of performance, plastic dryers typically have a drying time of 1-4 hours, with energy consumption concentrated on heating and air supply, and temperature control accuracy of ± 5 ℃; Due to the need to balance mixing, the drying time of the mixed dryer is slightly longer than 2-6 hours, but the overall process efficiency is higher. Energy consumption increases with mixing power, and temperature control needs to consider material shear heat, with an accuracy of ± 3 ℃.

When selecting, if drying and mixing are carried out step by step and the material is single, choose a plastic dryer; If synchronous processing of multi-component materials is required (such as mixing recycled materials with additives), or if equipment integration is pursued, a mixed dryer is more suitable. In terms of maintenance, the former focuses on heating elements and fans, while the latter requires attention to mixing shaft seals, blade wear, and bearing lubrication to ensure mixing accuracy and equipment lifespan.