Cause Analysis of Short Circuit of Die cartridge rod heater
What is the cause of the short-circuit and open-circuit of the cartridge rod heater of the mold?
1. The distance between the two holes of the lead-out wire is too close, which causes a short circuit in the cartridge rod heater.
2. The position of the heating area of the electric heating element has been moved to the outlet port and exposed to the air.
3. Excessive temperature is a necessary and sufficient condition for the short circuit caused by the rated voltage of the two lead wires.
4. In use, the aperture of the mold hole is horn-shaped, which is due to the defect of the module drilling process and affects the heat conduction.
5. The loosening phenomenon occurs at the end of the lead wire of the bullet electric heating element, which affects the heat conduction and air breakdown, causing a short circuit in the cartridge rod heater.
6. The distance between the inferior sealing silicone and the first screw of the root of the lead wire is too close. At this time, the production process occurs.
7. Using ferro-chrome-aluminum as the lead wire has an excessive resistivity to increase the temperature of the lead wire of the electric heating element and an accident occurs.
Precautions for using cartridge rod heater of mold
The manufacturing process and material selection of the cartridge rod heater of the mold is important, but the good stuff is bad, so it is very important to understand how to use the heating rod correctly. The following will introduce the commonly used points:
1. The cartridge-type electric heating element itself has a high watt density, often because the heat transfer is too poor, which causes the outer tube body to become black, and the internal high temperature accelerates the aging of the heating wire, which causes the heating wire to break.
2. Pay attention to the precision of the deep hole processing of the mold. Do not drill at both ends, because the junction can not be close and there are large pores, which makes the electric heating tubular poor in heat dissipation and the temperature of the heated body is uneven.
3. Attention should be paid to the magnesium oxide powder at the outlet end of the electric heating tubular. It should not be exposed to pollutants and water in the use place to prevent leakage. It is best to reserve 5m / m outside the mold.
4. Use electric heating element for starting, it is best to preheat for 5 minutes, so as to avoid the risk of leakage due to air humidity or water infiltration into the pipe, you must install a ground wire when using electric heating machinery.