How to Change Adhesive in Dual-Component Dispensing Machines

Switching adhesives in dual-component dispensing machines requires thorough cleaning to prevent chemical reactions or quality issues caused by residual mixing. Follow these steps for safe and efficient operation.

‌I. Preparation‌

1. ‌Confirm Adhesive Type‌: Consult suppliers to identify suitable cleaning agents (e.g., industrial alcohol, acetone-based solvents).

2. ‌Close Valves‌: Seal the bottom valves of the A/B material tanks to isolate them.

‌II. Cleaning Process‌

1. ‌Empty Residual Adhesive‌: Operate the machine to dispense and purge all remaining adhesive from the dispensing valve, high-pressure PTFE tubing, and A/B pumps.

2. ‌Power Off‌: Disconnect the machine’s main power supply.

3. ‌Clean Material Tanks‌:

• Remove the bottom tubing and drain residual adhesive.

• After closing valves, pour cleaning agent into the tanks and scrub internal surfaces thoroughly.

4. ‌Clean A/B Pumps‌:

• Detach the pumps (requires professional assistance) and remove internal adhesive residue.

‌III. Adhesive Replacement‌

1. ‌Reinstall Components‌: Return cleaned A/B pumps to their positions and reconnect tubing.

2. ‌Replace Tubing‌: Install new high-pressure PTFE tubing if worn or contaminated.

3. ‌Load New Adhesive‌: Pour fresh adhesive into tanks, then run the machine in "Jog Mode" for 3–5 minutes to verify smooth dispensing.

4. ‌Adjust Ratio‌: Calibrate the A/B mixing ratio as per specifications.

‌IV. Key Considerations‌

• ‌Safety‌: Wear waterproof gloves and ensure adequate ventilation during cleaning.

• ‌Maintenance‌: For machines without auto-cleaning functions, schedule manual cleaning cycles to prevent buildup.