According to the difference of drying materials, drying boxes are divided into electric blast drying boxes and vacuum drying boxes. Nowadays, they have been widely used in chemical industry, electronic communication, plastics, cable, electroplating, hardware, automobile, photoelectric, rubber products, molds, spraying, printing, medical treatment, aerospace and colleges and universities and other industries.The huge market demand makes the varieties of drying boxes diversified, and the quality of the products are not the same. In order to make people understand drying boxes more clearly, they can identify the quality of drying boxes with a pair of discerning eyes.
First of all, from the structural analysis, the general drying box shell is made of cold rolled steel plate, but from the thickness, the difference is very big. Due to the vacuum environment inside the vacuum drying oven, in order to prevent atmospheric pressure from damaging the box, the thickness of the shell is slightly larger than that of the blast drying oven. Generally, the thicker the steel plate is, the better the quality and the longer the service life. In order to facilitate observation, the door of the drying oven is equipped with glass Windows, generally toughened glass and ordinary glass on the inlaid door. Wuhan is still measuring the production of drying oven doors all use toughened glass, although the price is a little more expensive, but the appearance is beautiful, and it is a powerful guarantee for the safety of the operators. From the outside to the inside, the inside of the drying box has two choices, one is galvanized sheet, the other is mirror stainless steel. Galvanized sheet is easy to rust in the long-term use process, which is not conducive to maintenance; Mirror stainless steel clean appearance, easy maintenance, long service life, is a high-grade liner material on the market, but the price is slightly higher than galvanized sheet. The inner sample shelf generally has two layers, can be added according to customer requirements.
Speaking of temperature, we have to talk about insulation and sealing. At present, the thermal insulation material of drying oven in China is mainly fiber cotton, and a few use polyurethane. The following talk about the different characteristics of the two materials. In terms of thermal insulation effect, the temperature resistance and insulation effect of polyurethane is better than that of fiber cotton. Generally, polyurethane can make the high temperature inside the box remain stable for several hours. It is worth noting that the high insulation performance of polyurethane can effectively prevent the excessively high temperature outside the box from scald the operator. When the fiber cotton drying oven is at high temperature, it can only rely on the temperature controller to control and adjust continuously to keep the temperature in the box stable, which greatly increases the working intensity of the fan and the controller, thus reducing the service life of the drying oven. From the later maintenance point of view, because the polyurethane is the whole injection molding into the box, the later maintenance is particularly tedious, the need to pull out all the polyurethane before maintenance, and then injection molding into the repair. And fiber cotton won’t be so cumbersome, easy to operate. Finally, speaking from the market, the price of fiber cotton is very cheap, and can meet most of the heat preservation requirements, widely used, Wuhan is still testing suggestions: the finer the fiber cotton, the greater the thickness, the higher the heat preservation quality. The sealing of the drying oven is generally made of anti-aging silicone rubber, which has a good sealing effect。
In the performance of circulating heating, the choice of fan is very important, there are mainly two kinds of domestic and imported fans. Wuhan is mainly imported French technology, low noise and high performance fan, in the process of use will not produce the noise of domestic fans, and the circulation effect is good, fast heating. Of course, the specific can also be selected according to the needs of customers。
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Post time: Feb-25-2023