What is a plastic dryer?

Plastic dryers are crucial pretreatment equipment before plastic molding, primarily used to remove moisture from plastic raw materials to prevent defects such as bubbles and cracks in finished products. They are widely used in the plastics processing industry. The equipment is typically made of stainless steel and equipped with a PID intelligent temperature control system for precise temperature control. It uses a hot air circulation system for heating and dehumidification, and the drum and base are detachable for easy material replacement and cleaning. The entire machine has an insulation layer to optimize energy consumption.

The development of dryers began with the intermittent fixed-bed dryer in modern times. In the mid-19th century, the use of tunnel dryers marked the transition from intermittent to continuous operation. Rotary drum dryers effectively agitated granular materials, improving drying capacity and intensity. Some industries developed continuous operation dryers tailored to their specific requirements, such as drum dryers in the textile and paper industries. In the early 20th century, spray dryers began to be used in dairy production, providing a powerful tool for large-scale drying of liquid materials. Starting in the 1940s, with the development of fluidization technology, high-intensity, high-productivity fluidized bed and airflow dryers emerged. Freeze-drying, radiation, and dielectric dryers provided new means to meet special requirements. Far-infrared and microwave dryers began to be developed in the 1960s.