Many people have doubts when it comes to the surface temperature uniformity of mold heater. Because the uneven temperature distribution will cause the material to deform or scorch, thus affecting the production. However, with the development of technology, cartridge heater can now provide a more uniform temperature distribution than ever before.
The structure of the cartridge heating element is one of the key factors, which includes the heating wire, the filling material, the jacket and the terminal head. Among them, the filling material is an important factor affecting the temperature uniformity.
Magnesium oxide powder is a commonly used filling material in mold heater. It has good thermal conductivity and insulation properties. Therefore, when the cartridge heater is working, the magnesium oxide powder can help the heating wire transfer heat, so that the heating rod surface temperature is more uniform.
In addition, the density of the filling material also affects the temperature uniformity. If the filling material is too dense, heat may be concentrated in certain parts of the heating element, resulting in uneven temperature. Therefore, in the design of mold heater, the density of filling materials need to be reasonable arrangement.
Generally speaking, the structure and filling materials of the cartridge heater have important effects on the uniformity of its temperature distribution. Reasonable design and selection of filling materials can improve the surface temperature uniformity to the greatest extent, improve production efficiency and reduce material loss.
