Precautions for the use of cast copper electric heater
1. The working voltage should not exceed 10% of the rated value; the relative humidity of the air should not exceed 95%, and there is no explosive and corrosive gas.
2. The wiring part is placed outside the heating layer and insulation layer, and the shell should be effectively grounded; avoid contact with corrosive, explosive media, and moisture; the lead wire should be able to withstand the temperature and heating load of the wiring part for a long time, and the wiring screws should be tightened. Avoid excessive force.
3. The cast copper electric heater should be placed in a dry place. If the insulation resistance is lower than 1MΩ due to long-term storage, it can be baked in an oven at about 200 degrees Celsius for 5-6 hours to return to normal. Or reduce the voltage and turn on heating until the insulation resistance is restored.
4. The cast copper electric heater should be positioned and fixed, and the effective heating area should be closely attached to the heated body, and empty burning is strictly prohibited. When dust or contaminants are found on the surface, they should be removed and reused in time to prevent heat dissipation and shorten the service life.
5. The magnesium oxide powder at the outlet end of the electric heating tube should avoid the infiltration of pollutants and moisture in the place of use to prevent leakage accidents.
It is mainly used for heating injection molding machines, extruders and blow molding machines in the plastics industry, as well as for heating reactors, melt pipelines and other chemical fields.
The electric heating tube is cast in metal materials such as aluminum or copper. The heating wire is isolated from the air. The heating body is sturdy and durable, uniformly heated, and rapid heat exchange. A cooling water channel or air channel can be set in the heating body. Explosion-proof junction boxes are used in special environments. If heat preservation is required, an insulation layer is provided.
The working temperature of cast aluminum can reach 350℃, and the power density can be as high as 3.5W/cm2.
The working temperature of cast copper can reach 650℃, and the power density can be as high as 8W/cm2.