With the wide application of hot runner die in electronic, automotive, medical, daily necessities, toys, packaging, construction, office equipment and other industrial sectors, it has become one of the indispensable industrial equipment in plastic mould industry. In the market, the types of hot runner temperature control boxes are: touch temperature control boxes, international standard plug-in card temperature control boxes, one-card double-point temperature control boxes, watch-head temperature control boxes, etc. Brands are many like cattle hair, MASTER, HUSKY, HUSKY, IBS, HOTSYS, MASTIP, MOULD-TIP, Gerongtai, Thermal Constant, Precision Control, Haiming, MASTIP, MICO, Hantai, Santa Vanti, MST, DME, SOKE, EWIKEN and so on (ranking is not good). In order.

Temperature control box is a kind of equipment which keeps the required temperature continuously. The manufacturer of temperature control box detects the temperature of heating runner mainly through the MCU in the core of the watch, then processes the data in the intelligent computer and outputs the appropriate proportional current value, so as to achieve the purpose of temperature control. The accuracy and stability of temperature control mainly depends on the following important factors:

1. Temperature measurement: Sampling cycle parameters, data filtering process determines temperature, temperature compensation of measuring circuit determines temperature measurement accuracy;

2. PID control: by adjusting the proportion of output current, the relevant parameters are proportional section, integral time and differential time;

3. PIDD control: through phase angle control, the relevant parameters are proportional section, integral time and differential time.

4. Automatic regulation: By analyzing the capacitance of the heating wire and the thermal constant of the die, the function of the dominant factor (latent heat and heat dissipation are provided).

How the environment changes will help to control the temperature accurately.

5. Output mode: can be changed according to the environment

SSR (PIDD) mode: Accurate temperature control can be achieved, but the noise of power supply is much greater than that of PWM mode.

PWM (PID) mode: Current noise is low, but the control ability of specific temperature is worse than SSR mode.