How can a resin dispensing machine reduce air bubbles during dispensing?

How to reduce air bubbles in glue dispensing machines? Operating a glue dispensing machine is a technical task. Controlling the dispensing speed, time, amount of glue used, and whether all air is removed are all important! KPD 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 use a two-component glue dispensing machine with a vacuum system to evacuate the mixture after mixing the base agent and hardener.

Turning the product to be dispensed by turning on the heating system of the glue dispensing machine will help the air escape.

Cure in a room with low temperature and humidity to allow sufficient time for the air to escape.

2. Moisture reacts with the hardener to produce gas. Symptom: Large air bubbles. Solution:

The following are some possibilities for the reaction between moisture and hardener:

Glue Dispensing Machine

a. The base agent has been used many times, and moisture is mixed in during each mixing process. It’s also possible that the packaging lid wasn’t tightly closed. To determine the cause, mix the base agent and hardener in a dry cup according to the instructions above and dry it in an oven (60-80℃). 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 it 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? Now you can solve these problems yourself! We kindly remind you to choose a reliable vendor like KPD when purchasing a dispensing machine!