The JHQ-380V cast aluminum electric heating ring uses tubular heating elements as the heating body, which are bent and formed, then cast with aluminum alloy to obtain a solid metal body. Compared with ceramic electric heating rings, the cast aluminum structure has no internal gaps, and heat is directly conducted to the heated object through the metal, resulting in a shorter heat conduction path. Ceramic rings rely on radiation and air convection to transfer heat, and their efficiency is limited under sealed or contact installation conditions. Purchasing personnel can choose according to the equipment installation method: when heating needs to fit closely to the surface of a mold or barrel, the contact conduction of cast aluminum rings is more advantageous; in open-space high-temperature radiation scenarios, ceramic rings are more suitable.
This model is suitable for an operating temperature range of 150°C to 450°C, covering common working conditions such as injection molding machine barrels, extruder screw zones, and pelletizer heating sections. Ceramic heating rings can usually reach higher surface temperatures, but this product has good long-term operating stability within 450°C. Power density is customized according to the size of the heated object and the heating time requirements, with conventional voltages of 220V or 380V. Compared with electromagnetic induction heating rings, cast aluminum rings have a simple structure, no special requirements for the control power supply, and lower initial investment, making them suitable for procurement projects sensitive to modification costs.
The cast aluminum body has high mechanical strength and can withstand vibration and assembly/disassembly operations during the operation of injection molding machines and extruders, and is not easy to break. Ceramic heating rings are relatively brittle and carry a risk of damage in positions subject to frequent disassembly or impact. After surface oxidation treatment, the corrosion resistance of cast aluminum rings to general industrial atmospheres is acceptable, but in strong acid, strong alkali, or high-humidity environments, their service life is lower than that of ceramic rings. During procurement evaluation, it should be confirmed whether corrosive media exist around the equipment. If the environment is highly corrosive, ceramic heating rings should be given priority or additional protective measures should be added.
This heating ring can be built with K-type or J-type thermocouples as needed, and the lead specifications and threaded hole positions are configured according to the customer's temperature control system. Unlike electromagnetic induction heating rings, which require a dedicated control cabinet, cast aluminum rings can be directly connected to PLC temperature control modules or conventional temperature controllers, making replacement and spare parts management simpler. Before placing an order, purchasing personnel should provide the temperature control interface type, lead length, and installation hole position requirements to avoid being unable to connect to the existing temperature control loop after arrival. Compared with tubular electric heating rings, the temperature measurement point of cast aluminum rings is closer to the heating surface, and the temperature control response is relatively timely.
The JHQ-380V cast aluminum electric heating ring is suitable for barrel heating of plastic machinery such as injection molding machines, extruders, pelletizers, and film blowing machines, and can also be used for heating molds, die-casting machines, and some chemical containers. When selecting, it is recommended to compare ceramic rings and electromagnetic induction solutions: if cost control, easy installation, and temperatures within 450°C are required, cast aluminum rings are an optional solution; if higher surface temperatures or strongly corrosive environments are required, ceramic heating rings should be evaluated. During procurement, the size of the heated object, required power, voltage, and temperature control interface should be clearly specified so that the supplier can customize according to actual working conditions.
