1.Leds yellowing.
Reason:
- the baking temperature too high or baking too long;
- the glue ratio is incorrect, A glue yellowing more easily.
Solution:
- AB glue in 120-120 degrees curing mold release within 30 minutes, more than 150 degrees for a long time baking yellowing easily.
- AB glue in 120-120 degrees 30 to 40 minutes curing mold release, more than 150 degrees or longer time baking yellowing.
- when making a large lamp holder, to reduce the curing temperature.
2.LED bubble problem.
Reason:
- The bowl bubble: bad stents dipping glue.
- Stent bubble: curing temperature is too high, epoxy curing.
- The plastic crack, blasting cap: short cure time, epoxy resin curing incomplete or uneven. AB glue beyond use time.
- Lamp holder surface bubbles: epoxy adhesive deaeration difficulties or user use vacuum degree is not enough, and the time is too long.
Solution: according to the usage, improve the process or contact with epoxy suppliers.
3.The LED bracket glue.
Reason:
1, the stent surface uneven capillarity.
2, AB glue contains volatile materials.
Solution: please contact the supplier.
4.LED encapsulation short baking from the mold after long roast color change.
Reason:
- inside the oven stack is too dense, poor ventilation.
- the local high temperature oven.
- other color pollution substances exist in the oven.
Solution:
To improve the ventilation. Remove dirt, confirm the actual temperature in the oven.
5.Color lamp on one row of stent, part of a phenomenon or gel time is differ, uneven quality.
Reason: insufficient mixing.
Solution: fully stir well, especially pay attention to the corners of the vessel.
6.Mold release difficultly
Reason: AB glue problems or rubber hardness of curing.
Solution: please contact the supplier and confirm the curing temperature and time.
7.Add the same batch the same dose of color agent, but the product color is different.
Reason: the toner concentration inequality; Or precipitation agent.
Solution: heating agent, stir well before use.