I. Preparations Before Powering On

1. Upon receiving the production task order, first retrieve the die and raw materials based on the mold number and material number listed on the task order and process sheet, and prepare the necessary tooling, tools, and workstation fixtures.

2. Verify that all circulating pumps are operating normally and check the water pressure, which should be between 0.15 MPa and 0.4 MPa. If the water pressure is abnormal, identify the cause, rectify the issue, and then press the water‑pressure reset switch to restore normal operation.

3. Turn on the main power switch of the electrical control cabinet; the main power indicator light will illuminate.

4. Turn on the glue‑pressing switch; the glue‑pressing gauge and the temperature controllers for each section display normally.

5. Turn on the temperature controls for each section, and use your hand or a mercury thermometer to verify that the temperatures of the heating jacket and the material being heated are approximately equal. If there is a significant temperature difference between the heating jacket and the material, stop heating, identify the cause, and resume operation only after conditions have returned to normal.

II. Power On

1. When operating the extruder, first extrude any residual material remaining from the previous run through the die. Once the heating temperature has reached the process‑specified set point and is maintained at a constant level for approximately 10 minutes, the machine may be started and material fed into the system. After ensuring uniform flow, proceed to install the die.

2. When starting the extruder, accelerate gradually; only increase the speed to the process‑specified setting once the compound has begun to extrude from the die. Adjust the die heating temperature in accordance with the process sheet.

3. During extrusion, monitor the production process and resume normal production only after confirming that all components are operating normally.

3. Stone‑burning process: The head‑end operator is responsible for heating the head end, the fuselage, and the first section of the stone‑burning chamber. The tail‑end operator is responsible for raising the temperature in the second and third sections of the stone‑burning chamber. The operating temperature of the stone‑burning chamber shall not exceed 260°C.

4. Inspection: The inspector and the tail‑end operator are responsible for measuring the mouth opening and conducting the first inspection. They shall perform unscheduled self‑inspections and measurements, promptly communicating with the head‑end operator upon identifying any issues to implement appropriate corrective actions, thereby minimizing nonconforming products and preventing batch‑level incidents. The cutting operator trims the strips to the specified dimensions, allowing for shrinkage allowance. For products requiring winding, they shall wind the required quantity according to customer specifications and periodically verify the nominal weight and length.

V. Shutdown

1. Stop feeding.

2. First, stop the first-stage stone‑to‑powder unit by turning off the switch, then stop the extruder.

3. Turn off the main power switch on the electrical control cabinet; the main power indicator light will go out.

4. Shut off the chiller.

5. Products may only be transferred to the next stage after passing self-inspection and receiving approval from the inspector.

6. Maintain thorough records of equipment operation and shift handovers.

7. Equipment shall be maintained and serviced in accordance with the maintenance procedures. After use, molds must be thoroughly cleaned, coated with anti-rust oil, and returned to the mold storage area.

8. Maintain a clean work area and ensure tools are neatly organized and properly arranged.