LED module filling is an important process in the LED display production process, especially outdoor LED module needs waterproof, filling is particularly important.
Filling is generally a manual and automatic filling two, by the curing agent and resin glue in accordance with a certain percentage of injection. Now generally use electronic potting, there are AB type, in accordance with the ratio of 10: 1 mixture, by hand or machine automatically fill the surface of the glue pouring module. Potting process is the first injection molding cavity in the LED injection of liquid epoxy, and then insert the welding of a good LED bracket, into the oven to epoxy curing, the LED from the mold out of the shape.
LED module filling need to pay attention to:
AB glue to be mixed evenly;
Filling the amount of moderate, not too small, not too much. Too little can not play a waterproof role, too much will affect the LED light angle and mask assembly.
Poor irrigation will appear the following phenomenon:
1. Impurities, more plastic, less glue, atomization
2. Bowl bubbles, pearl bubbles, linear bubbles
3. colloid damage, colloid cracking (glue aging or proportion of not), colloidal yellow (A plastic ratio is too large).
4. Stent insertion, stent inserted deep, stent inserted shallow, stent inserted anti-stent climbing plastic, stent yellow (oxidation, baking temperature is too high or too long)