Some common problems found in the process of using LED package epoxy resin AB glue, and the corresponding solutions are given for your reference. Please also ask us to find alternative problems in use, and we all come together to find a solution.
First, the LED yellow.
Reasons: 1. The baking temperature is too high or the time is too long;
2, the proportion of the glue is wrong, A glue is more likely to yellow.
Solution: 1. AB glue is cured and demolded in 120-140 degrees / 30 minutes, and it is easy to yellow when it is baked for more than 150 degrees.
2. AB glue is cured and demolded at 120-130 degrees/30-40 minutes. If it is over 150 degrees or baked for a long time, it will yellow.
3. When making a large lamp holder, reduce the curing temperature.
Second, the LED bubble problem.
Reasons: 1. Bubbles in the bowl: the bracket is poorly glued.
2. Bracket bubble: The curing temperature is too high and the epoxy curing is too intense.
3. Cracking rubber, bursting top: curing time is short, epoxy resin curing is not complete or uneven. AB glue is out of service time.
4. Bubbles on the surface of the lamp cap: Epoxy glue has difficulty in defoaming or the user does not use enough vacuum, and the glue dispensing time is too long.
Solution: Improve process or contact epoxy supplier depending on usage.
Third, the LED bracket is crawling.
Reasons: 1. The surface of the bracket is uneven and produces capillary phenomenon.
2. AB glue contains volatile materials.
Solution: Please contact the supplier.
Fourth, the LED package is short-baked and discolored after being baked.
Reasons: 1. The stacking in the oven is too dense and the ventilation is poor.
2. The local temperature of the oven is too high.
3. There are other color pollutants in the oven.
Solution: Improve ventilation. Remove color stains and confirm the actual temperature in the oven.
5. The lamps on the same row of brackets have some coloring or gelling time, and the quality is uneven.
Cause: The mixing is not sufficient.
Solution: Stir well, especially at the corners of the container.
Six, not easy to demould.
Cause: There is a problem with the AB glue or the glue does not reach the curing hardness.
Solution: Please contact the supplier to confirm the curing temperature and time.
Seven, add the same batch of the same dose of toner, but the color of the product is not the same.
Cause: The toner concentration is not uniform; or the toner is precipitated.
Solution: Warm up the toner and mix well before using.
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