Drying boxes are divided into two categories based on the different drying substances: electric blast drying boxes and vacuum drying boxes. They are widely used in industries such as chemical, electronic communication, plastics, cables, electroplating, hardware, automotive, optoelectronics, rubber products, molds, spraying, printing, medical, aerospace, and higher education institutions. The huge market demand has diversified the variety of drying ovens, and the construction quality of products is also not the same. In order to enable people to have a clearer understanding of drying ovens and distinguish their quality with a pair of discerning eyes.

Analyze from a structural perspective

The shell of a typical drying oven is made of cold-rolled steel plate, but there is a significant difference in thickness. Due to the vacuum environment inside the vacuum drying oven, in order to prevent the box from being damaged by atmospheric pressure, the thickness of the outer shell should be slightly larger than that of the blast drying oven. Generally, thicker steel plates are chosen for better quality and longer service life. For the convenience of observation, glass windows are installed on the doors of the drying oven, usually made of tempered glass and ordinary glass embedded in the doors. Wuhan Shangce produces drying oven doors that all use tempered glass. Although the price is slightly higher, the appearance is beautiful, which is a powerful guarantee for the safety of operators. From the outside to the inside, there are two options for the inner liner of the drying oven: galvanized sheet steel and mirror stainless steel. Galvanized sheet is prone to rusting during long-term use, which is not conducive to maintenance; Mirror stainless steel has a clean appearance, is easy to maintain, and has a long service life. It is the last liner material in the market, but the price is slightly higher than galvanized sheet. The sample rack for the inner container usually has two layers, which can be added according to customer requirements. Due to the fact that the quality of the sample rack is made of stainless steel compression, and the additional racks are not conducive to the circulation of internal hot air, the quality requirements for the fan are increased, so the cost of adding one rack is between 300 yuan.

From temperature analysis

We have to talk about insulation and sealing. At present, the insulation material of the internal drying oven is mainly fiber cotton, with a few using polyurethane. Below are the different characteristics of the two materials. In terms of insulation effect, polyurethane has better temperature resistance and insulation effect than fiber cotton. Generally, polyurethane can keep the high temperature inside the box stable for several hours. It is worth mentioning that the insulation performance of polyurethane can effectively prevent the operator from being scalded by the high temperature outside the box. The drying oven made of fiber cotton material can only rely on a temperature controller to continuously control and adjust the temperature inside the oven at high temperatures, which greatly increases the working intensity of the fan and controller, thereby reducing the service life of the drying oven. In terms of later maintenance, as polyurethane is injected into the box as a whole, it is particularly cumbersome to carry out repairs in the later stage. Before repair, all polyurethane needs to be removed and injected again after repair. Fiber cotton is not so complicated and the operation is simple. From a market perspective, fiber cotton is very cheap and can meet most insulation requirements, making it widely used

Suggestion: The finer and thicker the fiber cotton, the higher the insulation quality. The drying oven is generally sealed with anti-aging silicone rubber, with good sealing effect.

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