Powder coating solution-Powder paint on the groove

In the actual powder coating process, we will encounter a variety of complex workpieces, due to the electrostatic shielding effect, resulting in a variety of recesses and dead-end parts that are difficult to spray on it.

1. Design of the formula

a, We all know that the first thing we need to understand the rival powder organic content is how much (can be detected by muffle furnace, general firing 600 degrees or 800 degrees up to two hours and other cooling can be detected)

b, The choice of formula resin, we should not choose the liquidity of the resin, the bottom of the groove itself is a large accumulation of powder, the choice of liquidity of the resin is easy to cause flow hanging, too little liquidity of the resin spray thin place easy to break the line (internal welding points can add a little anti-breaking agent)

c, The design of the powder formula can be added to a certain amount of dead-end on the powder and power enhancers

d, Powder particle size control, in fact, the content of D10 (ultra-fine powder) is more important than the average particle size, we must find a way to reduce D10

2. Comparison experiment

When we do two different powder groove on the detection of powder, you can use the iron plate to do some groove parts to simulate the workpiece itself, and then spray the interior. The amount of powder on the groove part depends on the powder groove on the powder capacity.

3. Data Analysis

a. Keep the same spraying technique and the number of times, observe the back of the "workpiece" after different powder spraying, which back powder on the more, that groove on the powder must be more

b. Using the same technique first with a powder spray five boards, sprayed without baking, powder and board together to weigh and record the total weight; then five boards of powder are blown off for a powder with the same technique to spray while weighing, which one heavy which one on the powder naturally to good