Common Issues and Solutions in Dispensing Machines

Common Issues and Solutions in Dispensing Machines

Dispensing machines are essential for precise adhesive application in industries like electronics, automotive, and medical device manufacturing. However, they can encounter several operational challenges that affect production quality and efficiency. Below are the most frequent issues and their solutions.

1. Inconsistent Dispensing Volume

Problem: Uneven glue dots or beads due to pressure fluctuations, clogged nozzles, or material viscosity changes.
Solution:

• Regularly clean and replace nozzles to prevent clogging.

• Use pressure pots or time-pressure systems for better control.

• Maintain material temperature to ensure consistent viscosity.

2. Nozzle Clogging

Problem: Dried adhesive or debris blocks the nozzle, causing interruptions.
Solution:

• Implement automatic nozzle cleaning cycles.

• Store adhesives in sealed containers to prevent curing.

• Use larger nozzle diameters for high-viscosity materials.

3. Air Bubbles in Adhesive

Problem: Bubbles disrupt dispensing accuracy and weaken bonds.
Solution:

• Degas adhesives before loading them into the system.

• Use vacuum chambers or pressure pots to eliminate trapped air.

4. Misalignment or Poor Positioning

Problem: Dispensed adhesive deviates from the target area.
Solution:

• Calibrate vision systems and robotic arms regularly.

• Ensure proper fixture alignment and workpiece placement.

5. Material Curing Too Fast or Slow

Problem: Incorrect curing affects bond strength and production speed.
Solution:

• Adjust temperature and humidity settings in the workspace.

• Select adhesives with suitable curing times for the application.

6. Machine Wear and Tear

Problem: Frequent use leads to component degradation.
Solution:

• Schedule routine maintenance for pumps, valves, and seals.

• Use high-quality, wear-resistant parts for longevity.

Conclusion