What is the cassette heater?

The cassette heater is a thin heating device in the shape of a tube used for internally thermal machinery and processes such as pay, deceased and forms and sealing sticks. The heater consists of a hollow metal tube with a durable wound heater built into the insulating compound inside. The thermocouple or controller supplies the power of the heating element with a set of wires that leave at one end of the tube. The cassette heater is inserted into the nearby opening into the material and heats it from the inside as soon as it is activated. Cartridge heaters are available as Swagged or Newagged and in different sizes and energy evaluations.

machines or procedural parts, such as embossed plates, thermoplastic forms and extrusions, require heating to work properly and in most cases it is best to heat internally. The cartridges are commonly used to achieve this internal heating and are integrated directly into the body of the appropriate part. The cassette heater consists of a thermal conductive metal tube, hollow in the centeru and limited at one end. The electrical resistance of the heater is wound around the insulating nucleus, usually ceramic compounds and placed in a metal tube. The space between the heating element and the tube is then filled with powder, such as magnesium oxide, which insulates the element electrically but well.

This device can then be built or left as it is. Swagging involves compressing the metal tube to limit against powder thermal conductor providing maximum heat transfer potential. Although it is beneficial, it is expensive and many low -floor heating cartridges are left Newagged. Power supply two heaters leads to the unlimited end of the tube. These wires can be axial for line or radial installation for applications that require lead 90 °.

Heater cassette is installed using a tight hole drilled into the body of the heated part. The tube must be firmly backwardNote into the opening to ensure maximum heating efficiency and with an average manufacturer specification requiring 0.010 inch (0.25 mm) difference between the diameter of the tube and the hole. The output of the cartridge heater is controlled by a surface thermocouple or a remote microcontroller that maintains part at an optimal temperature. These heaters are available in a number of 1/4 inch sizes (6.35 mm) to 1 inch (25.4 mm) in diameter. The cassette heaters are evaluated in the "Watt density" units based on the diameter, length and power consumption of the heating.