1. Preparation

• Power On: Connect the machine to a stable power supply and turn on the main switch.

• Air Pressure: Ensure the compressed air supply reaches the required pressure (typically 0.6–0.8 MPa).

• Mold Installation: Install the correct mold for 5L bottles and secure it tightly.

• Preheat: Turn on the heating system and preheat the PET preforms (typically to 90–110°C) until they reach optimal temperature.

2. Loading Preforms

• Place the preforms into the feeding rack or hopper, ensuring proper alignment for the conveyor.

3. Machine Start-Up

• Manual Mode: Set the machine to semi-automatic mode (usually via a control panel).

• Test Cycle:

  • Press the “Start” button to initiate a test cycle.

  • Observe the preform transfer, heating, mold clamping, blowing, and ejection processes.

  • Adjust air pressure, heating time, or cooling time if needed.

4. Blowing Process

• The machine automatically:

  1. Transfers a preform to the heating station.

  2. Heats the preform evenly.

  3. Moves it into the mold and closes the mold.

  4. Injects high-pressure air (blow molding) to form the 5L bottle.

  5. Cools the bottle briefly before ejecting it.

5. Quality Check

• Inspect the first few bottles for defects (e.g., uneven thickness, deformation).

• Adjust parameters (temperature, blow pressure, timing) if necessary.

6. Continuous Production

• Once settings are optimized, continue production by repeating the cycle.

• Monitor the process periodically to ensure consistency.

7. Shutdown

• Stop Production: Press the “Stop” button.

• Cool Down: Allow heaters to cool before turning off the power.

• Mold Removal: Clean and remove the mold if needed.

Safety Notes

• Wear heat-resistant gloves when handling hot preforms or molds.

• Keep hands clear of moving parts during operation.

• Emergency stop button must be accessible at all times.

Key Parameters to Monitor

• Heating Temperature: Adjust based on preform material (PET).

• Blow Pressure: Typically 20–30 bar for 5L bottles.

• Cycle Time: Optimize for efficiency (usually 10–20 seconds/bottle).