How to clean residual glue from hot melt glue machine?

Hot melt glue machines are widely used in packaging, handicraft and furniture bonding fields. Long-time operation will leave solidified and carbonized residual glue inside the equipment, which easily leads to nozzle blockage, unstable glue output and even machine failure. Regular and correct cleaning can maintain working efficiency and prolong the machine’s service life. Here is a complete cleaning tutorial.

Safety First Before Cleaning

Always power off and disconnect the machine first. Never conduct cleaning work when the device is heated. Wear heat-resistant gloves and protective glasses to avoid accidental burns. Prepare cleaning tools in advance: plastic scraper, soft brush, lint-free cloth, special hot melt glue cleaner and waste glue collection box.

Step 1 Empty Remaining Glue in the Tank

Reheat the glue tank moderately to soften the leftover glue. Put the collection box under the drain outlet, then open the drain valve to release all waste glue. Take out the internal filter screen and scrape off adhered glue dirt completely, preventing impurities from blocking the pipeline.

Step 2 Clear Blocked Nozzle and Pipeline

Dismantle the cooled nozzle gently. Brush off loose glue residue with a soft brush. For heavily clogged nozzles, soak them in professional cleaning solvent for a while to soften stubborn glue. Blow through the inner channel with compressed air until it gets unobstructed. Check the glue hose and clear accumulated carbonized glue inside.

Step 3 Wipe Off Surface Stubborn Glue

Use a plastic scraper to gently remove thick cured glue on the machine surface, do not use sharp metal tools to prevent scratching the shell. Apply cleaning liquid on sticky marks, wait for several minutes and wipe clean with dry cloth. Polish the metal parts to restore smooth appearance.

Step 4 Internal Circulation Cleaning & Reassembly

Add dedicated cleaning oil into the glue tank, heat and circulate the liquid inside the whole conveying system to dissolve hidden residual glue. Drain the dirty liquid after circulation finishes. Install the cleaned filter, nozzle and pipeline firmly. Start the machine for idle running test to ensure smooth glue discharging.

Practical Daily Maintenance Advice

Clean residual glue weekly for frequently used machines. Avoid corrosive detergent to protect machine accessories. Empty unused glue if the machine will be idle for more than one day. Good daily cleaning habits cut down maintenance costs and keep stable bonding quality all the time.

If you want to find a good machine or an expert help, visit wahrheits.com.

You may also like：

Hot Melt Glue Coating Machine

Hot Melt Glue Spray Gun

Hot Melt Glue Coating Machine