The purpose and classification of heating coils

1、 The purpose of the heating ring
1. Heat treatment: Local or overall quenching, annealing, tempering, and heat permeation of various metals
2. Hot forming: whole piece forging, partial forging, hot stamping, hot rolling,
3. Welding: brazing of various metal products, welding of various cutting tools and blades, welding of saw teeth, welding of steel pipes and copper pipes, welding of the same and different metals
4. Metal melting: (vacuum) melting, casting and evaporation coating of metals such as gold, silver, copper, iron, aluminum, etc
5. Other applications of high-frequency heating machines: semiconductor single crystal growth, heat matching, bottle mouth heat sealing, toothpaste skin heat sealing, powder coating, metal implant plastics.
2、 Classification of heating coils
1. Folding stainless steel ceramic heating ring
The high-temperature resistant ceramic electric heating coil is not made using the general mica winding method, but using the ceramic strip threading method, so the power of this product is 0.5-1.5 times higher than that of ordinary ones. The heating element is made of imported round wire pottery twisted into a spring shape and threaded into ceramic strips. The outer cover is made of Japanese stainless steel, and the middle is made of high-temperature insulation cotton (aluminum silicate fiber board) to prevent temperature leakage. Ceramic strips are high-frequency ceramics with the characteristics of fast heat transfer, hardness and non fragility, high temperature non deformation and non aging.
Ceramic heating ring brief performance: It is mainly suitable for extrusion, casting, and downward punching mechanical operations, with a temperature of up to 450 degrees Celsius and a maximum surface load of 6.5WC. It is characterized by long lifespan, high temperature resistance, reduced energy consumption by 30%, and high insulation. It is currently the most suitable electric heating product for extruders, injection molding machines, and film blowing machines. Ceramic heating rings have the advantages of easy installation, fast heat transfer, good insulation, and production not limited by models and specifications.

High working temperature, fast heating, high thermal efficiency, pollution-free, uniform and accurate heating.
Flexibility: When heating containers or pipelines, they can be bent into an arc or circular shape and wrapped on the surface for heating. For heating large workpieces, local wrapping can be used, and large workpieces can be covered with flat paving. In addition, it can be suitable for heating workpieces of various geometric shapes. High working temperature, fast heating, high thermal efficiency, pollution-free, uniform and accurate heating, and can achieve automatic control. High mechanical strength, good thermal insulation performance, large contact surface with heated objects, and long service life. Easy to install and maintain, with low usage costs. Even if the internal heating material is damaged, the external ceramic components can still be reused.
2. Folding stainless steel mica heating ring
The mica heating ring is made of high-quality nickel chromium alloy heating wire as the heating element, and is wrapped with natural mica as the insulation layer. The outer layer is made of high-quality stainless steel as the conductive heating layer. The mica heating ring can be mechanically processed into rings, plates, and various special-shaped products according to customer needs. The surface of the mica heating ring is normally within 2.5 to 3 watts per square centimeter. Customers should use an automatic temperature control system according to the required power range to ensure normal power and protect the service life of the heating ring. Performance advantages of stainless steel mica electric heating ring. Due to the use of stainless steel and mica as raw materials, this product is not limited by specifications in production. It can be used for small-scale heating of nozzles and for heating on plastic machine barrels. It has the characteristics of reasonable structure, beautiful appearance, stable performance, uniform heating, fast heat dissipation, long service life, good insulation performance, and high voltage resistance. Scope of use of stainless steel mica heating ring: widely used in plastic molding machinery such as injection molding machines and extruders.
3. Folding cast aluminum heating ring
The cast aluminum heating ring can be divided into die casting and casting casting. In situations with multiple specifications and sizes, the casting process is generally used. During casting production, high-purity aluminum blocks are used, which are transformed from solid to liquid state through a high-temperature furnace. They are then injected into a mold with installed heating pipes, cooled and formed, and then processed for precision production. The normal thickness of the cast aluminum heating coil is 20mm and 25mm, among which the inner wall of the 25mm wall thickness heating coil is designed with a concave and convex air groove structure to prevent the internal heating tube from overheating during use. For example, when the temperature is high, air cooling or water cooling can be used on the inner wall to quickly reach the standard temperature for use. At the same time, the heating ring basically adopts the method of separating the circular half into two semi circular pieces, and then fixing and installing them with fixing bolts. The temperature measurement space is mainly used in situations where temperature signals need to be collected. Usually, holes are opened on the curved surface of the cast aluminum heating ring according to its design size for installing thermocouples.