What is the dynamic characteristics of the overflow width of the hot press

What are the dynamic characteristics of the overflow width of the automatic hot-press molding machine?
The main contents are as follows: (1) When the flow or pressure changes suddenly, the control pressure change process of the overflow valve of the automatic hot-press molding machine is called the dynamic characteristics of the overflow valve; (2) When the input signal changes gradually, the typical dynamic response curve of the relief valve. Vacuum hot press is an electrical and mechanical connection device that heats two parts coated with flux in advance to a temperature sufficient to melt and flow solder, and forms a * * * between parts and solder after curing. The carbon fiber hot-press molding machine is pressurized on the basis of negative pressure and equipped with special glue. For the processing of PVC series, the line shape and adhesion force of the hot-press are unmatched by negative pressure equipment. The servo hot press has various working modes such as single working platform, rotary working platform, left and right mobile platform. When a step signal is input to the valve, the valve responds immediately, making the controlled pressure rise rapidly to the peak pressure ρ Max, and then gradually decay and fluctuate to a stable pressure regulating value pill. The whole dynamic response process is a transitional process.
(3) The time-domain analysis characteristics of the automatic hot-pressing molding machine can reflect the rapidity, stability and accuracy of the relief valve. The main technical indicators are as follows.

It reflects the relative stability of the safety valve. The overshoot shall be as small as possible, otherwise the piping system and related components may be damaged. The pressure overshoot rate of a good safety valve should be less than 30%. Boost time~tl is the time required for the pressure to rise to the set value * * times, and A~tl is called boost time, reflecting the rapid response of overflow valve and flow valve. For a good safety valve, the pressurization time should not be greater than 0.10, so the pressure rise time~t2 (regulating time). The time~t2 from the pressure rise to the set value reflects the rapid response of the safety valve and the damping state and stability.
D. Pressure unloading time t30 drops from the set pressure to the unloading pressure ρ。 The required time t~3 is called pressure unloading time, which is also a fast indicator. Generally speaking, this value should not exceed tens of milliseconds.