Common problems and solutions in the dispensing process : a must-read for efficient production

 In precision manufacturing fields such as electronics, automotive, and medical, the stability of the dispensing process directly determines product quality. However, various problems inevitably arise during the dispensing process due to factors such as adhesive characteristics, operating procedures, and equipment maintenance. This article summarizes six common problems in the dispensing process and provides professional solutions based on the structural features and technological advantages of Second Intelligent dispensing machines , helping companies quickly troubleshoot and improve production efficiency.

 

1.Abnormal dispensing amount (too much/too little ) :

Problem description : Excessive glue dispensing volume ( the volume of glue output in a single dispensing operation ) causes glue to overflow and contaminate the product; insufficient glue dispensing volume results in weak adhesion and product malfunction.

Main reasons: improper pressure settings, incorrect dispensing time parameters, mismatch between needle selection and glue viscosity, and unstable back pressure of the glue supply system.

 

Solution :

● Parameter calibration: Adjust the dispensing pressure according to the viscosity of the adhesive (for example, the pressure needs to be increased for high-viscosity silicone), and simultaneously fine-tune the dispensing time. It is recommended to use the principle of “small amplitude multiple tests” to determine the optimal value.

Figure 1. Various dispensing needles from Second Intelligent

2.Stringing phenomenon :

Problem description : When the dispensing head leaves the workpiece, the glue forms a continuous fine thread that remains on the product surface or the dispensing head, affecting the appearance and subsequent processes.

Main reasons: high glue viscosity, improper glue shut-off delay setting, insufficient stringing height ( the distance the dispensing head rises after dispensing until the glue breaks naturally ) , unstable air pressure, or worn needle.

Solution :

● Adhesive optimization: High-viscosity adhesives can have their viscosity reduced using Second Intelligent’s dedicated heating module, or by adding a special thinner.

● Parameter adjustment: Set the glue-off delay (10-30ms) to ensure that the glue flows out completely before closing the glue valve; increase the stringing height from the default value by 1-3mm, and use the “diagonal pull and lift” action (angle 15-30°) to break the glue.

● Equipment maintenance: Replace worn needles, and regularly clean the needles and glue valves with a special solvent to remove residual cured glue.

● Turn on the equipment’s air pressure stabilization function to control the air pressure between 0.3 and 0.5 MPa to avoid air pressure fluctuations.

Conclusion:

Second Intelligent dispensing equipment, with its advanced control system and precise mechanical structure, provides stable dispensing solutions for various manufacturing enterprises. For common problems encountered during the dispensing process, simply pinpoint the cause and implement targeted solutions using the equipment’s specific functions to quickly restore production. For further information on Second Intelligent equipment operation techniques or troubleshooting services, please contact Second Intelligent’s official after-sales service. Their professional technical team will provide comprehensive support to make dispensing production more efficient and stable.

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