The optimal solution is to adopt a proportional valve control mode combined with active incremental pressure holding functions. The specific optimization strategies are as follows:

1. Adopt Proportional Valve for Full-Process Curve Control The literature considers this the mode "most likely close to the ideal." By using proportional pressure valves or proportional flow valves, the current or voltage can be controlled according to a set curve, thereby continuously controlling the thrust and displacement of the electromagnet. The optimization is reflected in three stages:

Boosting Stage: Achieves continuous control of the boosting speed. This coordinates with the heating curve to improve pressure transmission and reduce the creation of pressure gradients.

Holding Stage: Achieves a continuous increase in system pressure (rather than simple constant pressure) to compensate for the pressure drop caused by volume shrinkage during phase transitions.

Relief Stage: Through program-controlled relief actions, the relief speed becomes controllable, accommodating different speed requirements at high and low pressures.

2. Implement "Active Incremental Pressure Holding" Strategy While traditional "variable frequency holding" maintains constant pressure, it ignores the compensation needed for pressure gradients caused by phase transitions. An optimized mode should adopt "active incremental pressure holding":

Mechanism: By setting pressure increments and time intervals (number of repressurizations), the system actively boosts pressure, rather than passively waiting for the pressure to drop to a certain point.

Purpose: This mode effectively lowers the pressure gradient, ensuring that the pressure conditions stored within the synthesis chamber meet the requirements for high-quality single-crystal diamond growth.

3. Avoid the Limitations of Old Modes During the optimization process, the following outdated modes should be avoided:

Traditional Rough Mode: Characterized by large pressure fluctuations, making it unsuitable for large chambers.

 Simple Variable Frequency Holding: Unable to compensate for pressure loss caused by phase transitions.

Passive Incremental Compensation: Relies on the pressure dropping to a set value before acting. It is limited by the risk of high-pressure seal failure and cannot truly compensate for pressure gradients.

To optimize the pressure control of a hydraulic press, the ideal solution is to build a system equipped with active incremental pressure holding functions and prioritize the adoption of proportional valve control technology. This achieves precise, continuous curve control throughout the entire process of boosting, holding, and pressure relief,.