1. Place the objects to be impregnated into the impregnation machine chamber, close the chamber lid and lock it with the lid‑locking device;

2. Apply vacuum negative pressure and hold the pressure for a period of time. The liquid from the liquid storage barrel is pressed into the chamber under atmospheric pressure. Close the liquid‑inlet pipeline when the liquid reaches a certain height;

3. Vacuum pumping: Maintain pressure holding after reaching a certain negative pressure;

4. Open the suction port for pressure balancing. Liquid naturally flows into the impregnation machine chamber under atmospheric pressure until the internal pressure equals the external pressure;

5. Apply positive pressure, mainly to force the liquid inside the chamber into the objects, so as to realize uniform impregnation or full saturation of workpieces inside the chamber;

6. Exhaust: Open the exhaust port to release air inside the chamber until the internal pressure is equal to external pressure;

7. Pressurized liquid discharge: Push all liquid out of the chamber by applying positive pressure, and the liquid‑discharge port of the impregnation machine is closed at this stage;

8. Exhaust again to balance the pressure inside and outside the chamber;

9. Spin‑drying: The spin‑drum inside the chamber rotates to remove excess liquid from impregnated objects by centrifugal force;

10. Drain liquid and take out the workpieces.

Precautions for using the impregnation machine: 1. Procedures 3, 4, 5 and 6 can be repeated until workpieces inside the chamber are evenly impregnated; 2. Positive and negative pressure inside the chamber shall be set according to customer requirements; 3. The maximum positive pressure inside the chamber can reach 0.6MPa (6.12KG/CM²), and the maximum negative pressure can reach 1.02‑10MPa; 4. Impregnation efficiency and product quality are greatly improved.