Why is it that the mold heating tube is easy to burn out?

There are many reasons why mold heating tubes are easy to burn out. The following is a detailed analysis of this problem:

1. Heating element quality problem

Material quality difference: The quality of heating tubes on the market is uneven, and the quality of materials such as heating wires and magnesium powder used in mold temperature controllers varies greatly. If the design of the heating tube is unreasonable or the material quality is not up to standard, it is easy to cause the heating tube to burn out during use.

2. Dry burning of heating tubes

Improper operation: During the use of the mold temperature controller, if the heater is turned on first and then the circulation pump is turned on, or the circulation pump fails and the heat transfer medium cannot flow, the heating tube will work without a heat transfer medium, that is, "dry burning". Dry burning will cause the surface temperature of the heating tube to be too high, thereby damaging the heating element.

Insufficient system pressure: When the pressure is too low due to insufficient fluid flow in the system, if no timely measures are taken, it may also cause the heating tube to dry burn.

Mold heating tube

Three, overload operation

Excessive power: The power of ordinary mold heating tubes cannot be too large. The normal surface load is about 5w/cm². The larger the surface load of the mold heating tube exceeds this standard, the shorter the life. Because air has an obstructive effect on heat conduction, if the internal temperature of the heating tube cannot be dissipated, it will cause the surface temperature of the electric heating tube to rise, and then cause the internal temperature of the heating tube to rise, and eventually the resistance wire may be burned.

Four, water quality or heat transfer medium problem

Water quality impact: For mold temperature controllers that use water as a heat transfer medium, the quality of water directly affects the service life of the heating tube. Scale adheres to the outer wall of the heating tube and the inner diameter of the pipe for a long time. If it is not cleaned for a long time, it will cause the heating tube to burn out.

Five, other human factors

Improper maintenance: Not paying attention to the daily maintenance of the mold temperature controller, such as not cleaning the scale in time, not checking the working status of the circulation pump regularly, etc., may cause the heating tube to burn out.

Improper operation: When the mold temperature controller is turned off, if the surface temperature of the electric heating tube is still very high, the power is suddenly turned off, which may also damage the heating tube due to thermal expansion and contraction.

In summary, the main reasons why mold heating tubes are easily burned out include heating element quality problems, dry burning of heating tubes, overload operation, water quality or heat transfer medium problems and other human factors. In order to extend the service life of mold heating tubes, reliable heating elements should be selected, operating procedures should be standardized, regular maintenance and inspection should be carried out, and attention should be paid to the management of water quality and heat transfer medium.