Atmosphere Switching Logic: Automatic Connection of Vacuum → Micro-posi"&"tive Pressure → Strong Cooling
In the complete graphitization process, the atmosphere needs to be switched multiple times: in the initial stage, vacuum is evacuated to remove air; after the temperature is raised to a certain level, it switches to"&" micro-positive pressure protection; after the process is completed, it may need to switch to strong cooling mode. Manual operation of these switches is not only inefficient but also prone to errors.
Automatic Switchi"&"ng of Trigger Conditions
The system supports three triggering methods:
- Time Trigger: Automatic switching upon reaching the set time point
- Temperature Trigger: Automatic switching upon reac"&"hing the set furnace temperature
- Event Trigger: Automatic switching upon detecting a specific process event (such as pressure reaching the target or gas concentration change)
These triggering conditions can be fl"&"exibly combined during process programming. For example, switching only occurs when both conditions, ""temperature reaches 1500℃ and holding time is completed,"" are met simultaneously.
Safety Confirmation Before Swit"&"ching
Before each atmosphere switch, the system automatically checks:
- Is the target atmosphere source pressure normal?
- Is the switching valve normal?
- Is the exhaust passage unobstructed?
- Does the curren"&"t state allow switching?
If any of these conditions are not met, the switching action will not be performed, and the system will alarm to prompt the operator for action. This **""confirm before action""** design avoids process interruption"&"s or safety accidents caused by switching failures.
Smooth Transition
Atmosphere switching is not an instantaneous ""hard switch,"" but rather a **gradual transition**. For example, when switching from vacuum to s"&"lightly positive pressure, the system first shuts down the vacuum pump, then slowly opens the inlet valve, allowing the furnace pressure to gradually rise to the target value. This avoids the impact of sudden pressure changes on products and equipment.
Value: Fully automatic atmosphere switching eliminates the risk of human error. The switching timing is precise and controllable, and the entire process re"&"quires no manual intervention, significantly improving safety and process consistency.