During the injection molding process, the dehumidifying dryer performance is usually measured by its dew point. Manufacturers often emphasize the dew point of dehumidifying dryers in sales, especially when dealing with moisture-sensitive materials such as PET, PMMA and nylon resins. However, when we choose A good dehumidifier, you also need to consider other factors.
A good dehumidifying dryer should be equipped with a well-designed bucket and a suitable dew point. Usually do the following to ensure the best hopper design: good insulation, uniform flow, reasonable temperature and air volume and Correct bucket volume.
1. Good insulation design can not only reduce the energy loss caused by the heat loss of the hopper, but also reduce the abnormal temperature fluctuation in the hopper and prevent the raw material from being affected by the external temperature change. Under normal circumstances, the abnormal temperature fluctuation will lead to product failure The rate of increase.
2. The flow affects the residence time of the feedstock in the hopper.When a larger hopper is required for selection, the uneven flow will degrade the feedstock and result in higher energy consumption.In PET applications, Black spots are often caused by uneven flow in some areas of the drum.
3. The effect of temperature fluctuations on the product is not recognized by most end customers. Through the test, it can be concluded that the effect of drying temperature of 10 ℃ on the product is much higher than that of dew point temperature change of 10 ℃. The table is different from the dew point conditions, 1 cubic meter of water content.
Under different dew point conditions, 1 cubic meter of water content
4. Excess air volume means greater energy loss, this part of the energy through the drying bucket into the dehumidifier, and by external cooling water cooling, which in turn increases the total energy consumption of the drying process.
The SCD-ES is equipped with PLC, air volume automatic control device and structural optimization of the barrel, can provide peace of mind solution, while ensuring lower energy consumption while making the drying process more intelligent.