7. High-gloss mold thermocouple system
Thermocouple is the most widely used temperature device in temperature measurement. It belongs to contact temperature measurement in temperature measurement. Its main features are wide temperature measurement range, stable performance, simple structure, good dynamic response and better remote transmission. The -20mA electrical signal facilitates automatic control and centralized control. The thermocouple's temperature measurement principle is based on the thermoelectric effect. Many high-demand molds are equipped with thermocouples (temperature detectors) for monitoring mold temperatures.
The working principle of the probe line in the high-light mold: the high-light mold is heated by the mold temperature machine. When the mold temperature is higher than the set value, the contactor of the temperature probe line is powered off, and at the same time, the mold temperature machine stops the mold. Heating; when the mold temperature is lower than the set value, the contactor of the temperature probe is closed, and the mold temperature machine heats the mold again, so that the mold temperature is repeatedly controlled, so that the mold is always working within the temperature range we desire, which is beneficial to Improve the quality of the product.
Thermocouples have positive and negative polarity. When wiring, be sure not to reverse the connection. Otherwise, the temperature control table cannot read a few, and it is easy to be mistaken for the temperature control table failure. When installing a thermocouple, the position of the temperature measurement point should be as close as possible to the glue position as the structure allows, in order to truly reflect the temperature state of the plastic.