Awards Gift CO.,LTD
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Epoxy coating is common used on lapel pin production,but how to finish it ?
Awards Gift CO.,LTD will introduce to you :
1.Firstly prepare all kinds of prepared substrates, such as PVC, plastic trademark and metal badge, in a 60-degree pre-heat treatment in the oven to remove moisture from the surface.
2. Place the dehumidified substrate on a horizontally-aligned operation panel for a drip.
3. Inject the crystal glue into the two vacuum storage tanks of the glue dispenser separately. Calculate the volume ratio of the crystal glue according to the specific gravity of the crystal glue, and then set the flow rate of the glue dispenser. (Note: The volume ratio is different from the weight ratio because the specific gravity of A and B glue may vary).
4. Keep the A and B glues in a vacuum state, open the glue dispenser and put the A and B glues into the mixing tank and mix under vacuum.
5. Place the prepared substrate (ie: signage, trademark, etc.) under the dripper and automatically dispense the glue. Generally, the thickness of the crystal glue layer is 2mm, so that it can be naturally leveled (Note: The above process is controlled within 10 minutes, so as to avoid the viscosity increase of the glue, which can not be operated. The PU glue time of the mechanical glue is more than the manual operation. Short usually 30 minutes gel, manual 2 hour gel).
6. After the substrate is dripped with crystal glue for 3-5 minutes, observe whether there are bubbles or dust particles on the rubber surface. If there are small bubbles, use a pin to puncture it. If it is found that there is no crystal glue in the dead corner, use The pin can be extradited.
7. The casted sign is cured at room temperature of 20 ° C to 30 ° C for 8 hours to become a crystal sign with no surface on hand.
8. In case of self-adhesive, trademark, etc., the thickness of itself is very thin, the boundary is not obvious. When pouring, it is easy to cause the crystal glue to overflow. It is difficult to reach the thickness of 2mm, so the crystal glue can be grasped differently, and the viscosity is controlled. In the application process, it can be placed for 1-2 hours to increase the viscosity and adapt to the pouring of thin crystal glue.
9, the production of crystal glue signs greater than 2mm thick, can be divided into two drops of plastic, after the first drop of plastic, solidified for 3-5 hours, and then add a layer.
10. After the plastic drop, whether it is manual plastic drop or automatic plastic drop, the machinery, equipment and container should be cleaned after completion. Because the crystal glue is hardened, it is insoluble in any solvent, so it must be machined before it hardens. Medium and container need to be cleaned
