To prevent dripping in a glue dispensing machine, check the shutoff system, dispensing pressure, adhesive condition, and nozzle before changing settings. Start by confirming that the valve closes fully, then reduce excess pressure or adjust the suck-back function only within the machine and adhesive manufacturer’s guidance. Clean or replace a blocked, worn, or poorly matched nozzle, and check for air bubbles or material that has changed in viscosity. Make one adjustment at a time and compare results across repeated dispense-stop cycles.
Dripping is not always a machine fault. It can result from pressure remaining in the fluid path, a valve that does not seal cleanly, or adhesive that flows differently because of temperature, age, or contamination. Our troubleshooting approach at SONGNA is to separate these possible causes before recommending a machine adjustment or component change.
After a dispense command ends, adhesive can continue to leave the nozzle if pressure remains in the fluid path or the shutoff point is not clean. A worn seal, residue around the valve, or an unsuitable nozzle opening may also affect how the material releases. Air trapped in the adhesive or tubing can make output inconsistent, while material that is too warm, too old, or otherwise out of specification may flow more readily than expected.
The same symptom can therefore have different causes. A slow, steady droplet after every cycle may point to residual pressure or valve closure, while intermittent strings or spurts can prompt a closer check for air, residue, or changes in material condition. These are diagnostic clues, not definitive tests; confirm the cause by inspecting the machine and following its manual.
Check the product label and supplier instructions for the adhesive’s storage, handling, and application requirements. Look for expired material, contamination, separation, or visible air bubbles, and do not use adhesive that appears abnormal without checking with its supplier. If a new batch or formulation recently coincided with the dripping, compare its recommended viscosity and dispensing conditions with the material previously used.
Follow the machine’s safety and cleaning procedure before removing or inspecting any wetted component. Look for dried adhesive, partial blockage, a damaged nozzle, loose fittings, or residue that could interfere with clean shutoff. Use a nozzle material and opening appropriate for the adhesive and application; do not clear a blockage with an unapproved tool or solvent, as that can damage components or contaminate the material.
Review the pressure setting and confirm that it matches the material and equipment instructions. Excess pressure can contribute to continued flow, but lowering it too far can create incomplete or inconsistent deposits, so avoid making a large adjustment based on one observation. If the machine has a suck-back or decompression setting, make a small, controlled change within the manufacturer’s limits and check whether the nozzle stops cleanly.
Confirm that the dispensing command ends as intended and that the valve closes without delay. Where the controller exposes valve timing, record the setting in ms before making a change, so you can return to the original value if performance worsens. If the valve appears to stick, leak, or close inconsistently, stop relying on timing adjustments alone and arrange inspection or maintenance according to the equipment manual.
SONGNA contains other products and information you need, so please check it out.
Air in the reservoir, tubing, or cartridge can make dispensing erratic and may contribute to strings or intermittent release. Inspect connections and seals for signs of leakage, and use only the machine’s prescribed priming or purging procedure to remove air. Keep the work area safe during purging, since uncontrolled discharge can expose operators to adhesive or create a cleanup hazard.
After an adjustment, run 10 dispense-stop cycles as a practical comparison, using the same material, nozzle, and operating conditions. Observe whether adhesive continues to emerge after the command ends, and note the change rather than relying on a single cycle. Record relevant settings—including pressure in kPa and timing in ms when available—alongside the adhesive batch and nozzle details.
Begin with the simplest checks: material condition, visible residue, loose connections, and the nozzle. If the adhesive continues to drip despite a clean, suitable nozzle, investigate valve closure and residual pressure before changing several controller settings. If the issue appeared after a material, temperature, or process change, confirm the adhesive supplier’s guidance before treating the equipment as the only cause.
Temperature deserves particular care because adhesives do not all respond in the same way. Do not apply a generic temperature target; maintain the conditions specified for the adhesive and machine. Where the machine or material supplier recommends monitoring temperature, record it in °C so that comparisons between production runs are meaningful.
Ask for supplier support if dripping persists after basic inspection, if the valve or fluid path appears damaged, or if the recommended adjustments do not produce repeatable results. Provide the machine model, adhesive name or type, nozzle details, operating settings, and a description of when the dripping occurs. A short record of cycle observations can help the supplier distinguish a material issue from a setup or component issue.
At SONGNA, we encourage buyers to review the full dispensing setup—not just the controller setting—when selecting or troubleshooting glue dispensing equipment. Share your adhesive requirements, desired deposit, production conditions, and the symptoms you observe so that our team can discuss a suitable equipment configuration or next diagnostic step. Any proposed setup should be checked against the actual adhesive and application before production use.
To prevent dripping in a glue dispensing machine, verify the adhesive condition, inspect and clean the nozzle safely, check for air or leaks, and confirm that pressure and valve closure follow the equipment and material guidance. Make one controlled change at a time, then compare repeated cycles and record the relevant settings. If dripping continues or a component may be faulty, pause adjustments and consult the machine or adhesive supplier. This method gives your team a clear next step while reducing guesswork and unnecessary changes.
For more How to Prevent Dripping in a Glue Dispensing Machineinformation, please contact us. We will provide professional answers.