What wavelength of infrared heating lamps should be used in shoe factories?
Infrared rays generally refer to electromagnetic waves with a wavelength between 0.78-10um. The infrared rays used in heating are all produced by incandescent phenomena, that is, when a certain heat-resistant material is energized or heated by a flame, its temperature is higher than 400°. This substance emits infrared rays that the human body obviously feels. The higher the temperature, the stronger the infrared rays can be felt, because the emitted infrared rays have shorter and shorter wavelengths and stronger energy.
Infrared heating lamps have been widely used in shoe factories for drying or activating shoe upper glue. Short wave IR lamps are used because the characteristics of SIR are fast response speed and heating temperature. Customers feel that they can reach the required temperature in a short time and complete the drying work, which can save time, that is, save energy.
However, there are two problems when using shortwave transparent tubes:
1. The brightness is too bright, it is very dazzling every time they work, and workers cannot check the working conditions;
2. If the temperature is too high, workers feel it is dangerous, and the high temperature is not easy to control, and it is easy to cause damage and deterioration due to excessive baking.
Later adjusted to a fully gold-plated shortwave infrared heating lamp, the brightness problem was solved, the temperature was relatively low, the frequency of shoes-upper burned out was reduced to a certain extent, but it still appeared, and the fully gold-plated lamp would be more The infrared radiant heat energy is retained inside the lamp tube, and it is found to be damaged much faster than the previous transparent tube after long-term use, so there is almost no improvement.
Combining our years of research on the principle of infrared heating and the experimental data on the absorption wavelength of different materials, we can know that the solution to the problem is not to increase the coating; it is to solve the mismatch of wavelength absorption, that is, to change the infrared heating lamp. Choice of tube type.
In fact, from a microscopic point of view, in any drying process, the main heating target should be the moisture inside, not other solid resin substances, not the substrate or the workpiece. If the drying process, the heat provided can automatically absorb the heated substance (moisture) to make the moisture rise as quickly as possible, while other substances that require less energy will absorb less energy. In this way, the drying process time is short, energy saving, equipment failure rate is low (MIR warranty period is four times that of SIR), workpiece temperature is low, and cooling time is short; the actual benefit to users is that the production speed is increased and energy is greatly saved. With substantial savings in electricity bills and overall cost reduction, the profits that can be generated will rise sharply.
In summary, drying or glue activation in the shoe industry is more suitable for medium-wave infrared heating lamps. Did you use it right?
