Heater bands, when used for some time, will burn out. Usually, the environmental factor will create a short shortage which will develop into a hot spot or force the band heating system to heat beyond its normal operating temperatures. As a result of this abnormal heating, these systems will develop some premature failures, which will need servicing to replace the worn-out parts.
According to the specialist from Rectangular band heater manufacturer and Band heater manufacturer, the life of these heating devices can be extended when they encounter heating problems that affect their operation. Here are some pieces of advice on how to extend their lives when they develop problems.
Poor conduct problem
Band heaters and rectangular band heaters are conductive heaters, so it is critical to keep them tightly fit. Supposing you fail to keep them tight enough, they will develop some localized hot spots, which may cause some failures due to wire resistance.
It is worth noting that the higher the working temperature you use, the more tightly you need to keep the heater. Address these problems by ensuring that you check the machine barrels and order heaters that fall within the exact measurement. You also need to read the instructions in the letter before you carry out installation and tightening procedures.
Watt density challenges
Usually, heaters are sized up to bring the press up so that heating can be done as quickly as possible. However, the heater wattage is usually higher than the average operational level. This high wattage drives up the temperatures inside the heater during the molding process and can shorten the heaters’ lifespan. Address these problems by choosing a watt density close to the load requirement levels and a safety measure in consideration. Further, you can seek help from the supplier to help you size the wattage properly after purchase.
Contamination is a severe problem that frequently affects band heater systems, leading to their failure when working. The main contaminants that affect them are plastic, moisture, and hydraulic oil. Typically, these contaminants will damage the lead wires that are inside the band. You can prevent problems by replacing your worn-out parts frequently. Additionally, ensure that the heaters are installed on a machine barrel that has no grit and scale because these scales usually cause a hot spot on the heater surface and, as a result, change the path of heat conduction.
When the sensors of your heaters encounter problems, and they become loose, or they disconnect to the extent that they cannot make contact with the surface that has been measured, then runaway temperature commands will take place. Another problem may also be caused by temperature overshooting.
You can address these problems by checking the sensor contacts to ensure they are well in place and when you contact our design work on the system, ensure that the total wattage that you apply to the current wattage that is required is matched to reduce cycling frequency and the temperature from overshooting.