Cartridge heater is made of metal tube as the outer shell, and spiral electric heating alloy wires (nickel chromium, iron chromium alloy) are uniformly distributed along the central axis of the tube. The gaps are filled and compacted with magnesium oxide sand with good insulation and thermal conductivity. The ends of the tube mouth are sealed with silicone or ceramic. This metal armored electric heating element can heat air, metal molds, and various liquids. Depending on the different usage status, safety, and installation requirements of the electric heating tube, it may also include sealing structures, terminal structures, flanges, temperature control or fuses, and other structures.

Performance of cartridge heaters:

Stainless steel cartridge heaters are made by placing electric heating elements in metal tubes and tightly filling the gaps with crystalline magnesium oxide powder with good heat resistance, thermal conductivity, and insulation, which is processed by other processes. It has the characteristics of simple structure, high mechanical strength, high thermal efficiency, safety and reliability, easy installation, and long service life. Widely applicable to various saltpeter tanks, water tanks, oil tanks, acid and alkali tanks, melting furnaces for fusible metals, air heating furnaces, drying furnaces, drying boxes, hot pressing molds and other devices.

Usage of cartridge heater:

Cartridge heaters are electrical components that specifically convert electrical energy into thermal energy. Due to their low price, convenient use, easy installation, and pollution-free nature, they are widely used in various heating situations. Stainless steel electric heating pipes have a long service life, with a general design service life of over 6000 hours

Standard classification of cartridge heater:

1. Cartridge heaters are generally divided into:

① Micro cartridge heaters: dia. Φ 3～ Φ 5.9㎜

② Standard cartridge heaters: dia. Φ 6～ Φ 25㎜

③ Large cartridge heaters: dia. Φ 25～ Φ 100㎜

④ Two semicircular cartridge heater: Two semicircular cartridge heater are an improved product of ordinary single end mold heating elements. They are made by folding a semicircular heating element in half, and after being folded, their own expansion force is closely matched with the mold hole. They have the advantages of high power density, long service life, and high heat efficiency. They are an updated product of mold cartridge heater, especially for high temperature requirements, Mold heating with fast heating speed.

⑤ Flat cartridge heater: This product is the most effective as a heating element in molds in special environments, used in some tapered mold holes. And other device manufacturers use it.

⑥ Square cartridge heater: This product is the most effective as a heating element in molds in special environments, used in some tapered mold holes.

⑦ Cone shaped cartridge heater: This product is the most effective as a heating element in molds in special environments, and is used in some tapered mold holes.

⑧ Hollow cartridge heater: Utilizes the hollow pipe of cartridge heater to quickly heat air.

2. According to the outlet standard, cartridge heater are generally divided into:

① External wiring cartridge heater: stainless steel hard wire is led out from the inside of the heating tube and connected to high-temperature wire from the outside. This is standard technical.

② Swaged-in wiring: The high-temperature wire is directly led out from the inside of the heating tube, which is a high cost process but not easy to break the wire.