Mold electric heating tubes are often used to heat molds. Commonly used mold electric heating tubes include mold single-head electric heating tube and double-head electric heating tube. The mold electric heating tube can also measure thermocouples and fixed baffles in a fixed position. So how to correctly choose the mold electric heating tube? Mainly from the pipe diameter, length, pipe and other aspects of selection.
1. The mold electric heating tube should be determined according to the size of the mold aperture, if the mold aperture is 10mm, the pipe diameter of the mold electric heating tube can be 9.8mm.
2. The length of the mold electric heating tube has the length of the electric heating tube.
3. The material selection of the mold electric heating tube should be determined according to the working temperature of the mold. Due to the conduction time difference between the mold temperature and the surface temperature of the mold electric heating tube.
(1) When the mold temperature is 150 degrees, the surface temperature of the mold electric heating tube may be about 300 degrees. At this time, the pipe material of the mold electric heating pipe should be 300 degrees stainless steel 304.
(2) When the mold temperature is 200 degrees, the surface temperature of the mold electric heating tube may be about 400 degrees. At this time, the pipe material of the mold electric heating tube should be 500 degrees stainless steel 321.
(3) When the mold temperature is 450 degrees, the surface temperature of the mold electric heating tube may be 600 degrees. At this time, stainless steel 310S material should be selected, and its temperature resistance is 700 degrees.
Of course, the temperature difference of heat conduction should vary according to the number of roots and mold size of the installed heating tube. This requires specific dimensions to judge.