How to reduce air bubbles in glue dispensing machines? Operating a glue dispensing machine is a technical job. Controlling the dispensing speed, time, amount of glue used, and whether the air is completely removed are all important! Shenzhen Zhonghu Glue Dispensing Machine will analyze methods to reduce air bubbles when operating a glue dispensing machine today. Let’s first analyze the main causes of air bubbles.
1. Air is introduced during mixing and is not completely removed during product injection and the entire curing process. Symptom: Very small air bubbles. Solution:
It is recommended to vacuum the mixture using a two-component dispensing machine after mixing the main agent and hardener.
Turning the product to be dispensed by turning on the heating system of the dispensing machine will help the air escape.
Cure in a room with lower temperature and humidity to allow sufficient time for the air to escape.
2. The reaction between moisture and hardener produces gas. Symptom: Large air bubbles. Solution:
The following are several possibilities for the reaction between moisture and hardener.
a. The base agent has been used many times, and moisture has been introduced during each mixing process. It could also be due to the packaging lid not being tightly closed. To determine the cause, mix the base agent and hardener in a dry cup according to the instructions above and place it in an oven (60-80℃) to dry. If bubbles still form, the base agent has deteriorated; do not use it again.
b. The potting product contains too much moisture. It is recommended to preheat the product and retest.
c. The surface of the base agent and hardener mixture reacts with moisture in the surrounding air. If this is the case, cure in a dry environment. If the product allows, it can be cured in a heated oven.
d. The liquid base agent and hardener mixture may have come into contact with other chemicals (such as solvents, release agents, varnishes, adhesives, etc.) before curing. Ensure these substances are removed before the next test.
Have you learned the two main causes of bubbles and their solutions? If you encounter air bubbles like this in the future, you can figure out how to solve it yourself. We kindly remind everyone to choose a reliable vendor like KPD AUTOMATION when purchasing a dispensing machine!
