The drying principle of the vacuum dryer is to use the principle of lowering the evaporation point of water under low pressure, so that the moisture in the raw materials can be quickly evaporated to achieve rapid drying, and the main parameter controlled is the degree of vacuum;
Putting the vacuum dryer and the dehumidifying dryer together for testing, the results show that the vacuum dryer can save 70%-80% of energy consumption. This is mainly because the desiccant of the desiccant dryer consumes a lot of energy during the regeneration process. The drying time of vacuum dryer is usually 1/5 1/6 of other dehumidification drying. Long-term high-temperature drying will cause thermal, chemical and physical reactions of raw materials, which will reduce the quality of materials, such as fading and melting index, thus affecting the quality of finished products. The vacuum dryer shortens the drying time of materials, thereby reducing the possibility of material quality degradation. Taking the drying of polycarbon (PC) as an example, drying at 120 degrees Celsius, under the premise of reaching a final moisture content of 0.02%, usually takes about 4 hours for dehumidification and drying, while vacuum drying only takes 20-25 minutes to complete the drying. . This saves 3 hours and 35 minutes of drying time. The application of vacuum dryers in the mold trial section has this advantage especially! . Some resins or macromolecules are highly sensitive, and if they are dried for too long, they may cause stress, leading to scorching, embrittlement, and discoloration of parts. The vacuum dryer changes the undesirable effects caused by the uncertainty of drying, thus greatly reducing the scrap rate.
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