Friday, June 12, 2020

Two ways of heating a resistance wire


High temperature resistance wire factory introduces two ways of heating resistance wire:
1. Insert the heating element composed of resistance wire into the mold heating plate;
2. Place the resistance wire directly in the heating plate of the mold.
When designing mold resistance heating, the following basic requirements must be considered:
1. Protective measures of the heating mold should be considered to reduce heat conduction and heat radiation loss. Generally, asbestos insulation board is set between the mold and the upper and lower pressing plate of the injection machine, as well as around the mold. The thickness is about 4-6mm;
2. Different power heating elements are used in the central and edge parts of the heating plate respectively. Generally, the power of the heating elements in the central part of the mold is slightly lower, while the power of the heating elements in the edge part is slightly higher.
3. Two sets of temperature instruments should be installed on the electric heating plate of large molds to control and adjust the temperature of the central and edge of the electric heating plate respectively;
These are the two ways of heating a resistance wire.
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