The experiment was so boring, Zhang Xiaofan shuttled back and forth between the capital and Yuezhou.

Since the research and development directions of the two laboratories are different but complement each other at the same time, Zhang Xiaofan has the intention to merge the two laboratories into one place.

Because of more than a month of going back and forth, Zhang Xiaofan really felt what it was, and he was tired and didn't want to move.

And the most important thing is that in the past month, due to the accident of Zhimei electrostatic powder spray gun, there has been a certain decline in sales, and it has been a sales decline for two consecutive months, Zhang Xiaofan is a little anxious.

What will be the sales volume in the next month? Zhang Xiaofan didn't know, but he didn't dare to bet.

Therefore, he must make some achievements, whether it is a new product or a new technology, or can come up with a perfect electrostatic spray gun, then he will finally give some explanation to customers, and it should also promote the sales of powder coatings.

Seeing that there was no progress in the two powder coating research laboratories and one electrostatic powder spray gun laboratory, Zhang Xiaofan wanted to end such a tiring trip every three or five times and see if he could merge the two powder coating studios into one.

Of course, it would be more desirable to put together the electrostatic spray gun laboratory if it is acceptable.

The powder coating laboratory is actually closely related to production, sometimes there will be some problems in production, and it is necessary for technicians to go to the site for investigation, and then determine what the problem is by looking at his results.

Therefore, Zhang Xiaofan thinks that the most ideal result is to move the powder coating laboratory in the capital to Yuezhou, and the two will be combined.

As for the electrostatic spray gun laboratory, it depends on Professor Qin's attitude, but Zhang Xiaofan thinks it is unlikely.

Just when I was working on this idea, I asked the professor that they had already come up with a finished product.

"This can be said to be the first generation of products, of course, there will definitely be a lot of problems, and it needs to be improved in future work practice. ”

When Professor Qin took the experimental machine and handed it to Zhang Xiaofan, Zhang Xiaofan was very strange, our products have not been developed, how can you be sure that this equipment can spray powder coating suspension?

"However, our products are still under development, which ......"

"I know so we're using paint, and a couple of other different types of suspensions, and they're all working amazingly.

We experimented with existing powder coatings, but instead of making it into a suspension, we moistened it with water. ”

This time, Zhang Xiaofan understood, and moistened the powder coating with water, that is, adding a small amount of water to make the powder coating surface adhere to a small amount of water.

But if that's the case, this makes Zhang Xiaofan very puzzled, the powder coating that has just been moistened with water will become a ball, how to spray in this situation?

"What is the uniformity of the powder coating sprayed, and is there any spitting powder?"

"Spit powder?"

Spit powder is not a proper noun, spit powder because the dispersion of the powder coating is not good enough, or because the temperature is too high, so that the powder coating reaches its glass transition temperature, thus producing a certain degree of adhesion, forming a small powder ball, this powder ball due to the diameter, exceeds the thickness of the coating film, so after the spraying is completed, it will form a shape similar to a small mountain bag.

This causes problems with the flatness of the coating film, with protruding grit or very large orange streaks.

"After the painting is completed, there are no flaws, such as unevenness. ”

"It turns out that you are afraid that the spraying is not uniform enough, and we solved this problem perfectly, but we sprayed two kinds of powder coating during the experiment, one is the sand surface, and the other is flat, and you need to improve the flat one, because there will be a lot of small holes in the flat one, which looks very uncomfortable. ”

So that is to say, basically all the problems, only some corners and corners are left, that is, how to eliminate, because the powder coating is moistened with water, so when baking, when the water is drilled out of the surface of the coating film, some pig pores are formed, and the sand surface will not exist in this situation, because the air permeability of the sand surface coating is very good.

This has to make Zhang Xiaofang have some side eyes, Professor Qin's technical research and development strength of their team is so strong, Zhang Xiaofan's idea is to rely on the cooperation of the two teams to complete this task.

But now the powder R&D team, but they haven't done anything, but they have solved basically all the problems, which makes Zhang Xiaofan have some wry smiles.

"The problem of small bubbles is very easy to solve, and this afternoon we can come up with the corresponding finished product and use this machine for experiments. ”

"That's good!"

"May I ask, how did you solve the problem of spitting powder?"

To be honest, Zhang Xiaofan was a little unwilling, when Professor Qin and they raised this topic, Zhang Xiaofan gathered all the technical personnel, and he did not have the mind to compare.

But now in the past month or so, there has been basically no progress in the research and development of powder coatings, but the research and development of electrostatic spray guns has been basically completed, which seems to have lost without comparison.

So Zhang Xiaofan also wants to know where he lost?

"High-pressure hedging, high-pressure dispersion. ”

Professor Qin's explanation is very simple, just eight words.

However, Zhang Xiaofan almost understands that if the high-pressure gas drives the powder coating from one direction for spraying, it is difficult to disperse the powder coating, especially the wet powder coating.

This is actually very easy to understand, when the sediment is dry, it is very easy to disperse into grains, but once the sediment is mixed with the water, you will find that it takes a lot of effort to disperse it.

The same is true for powder coatings, all the powder coatings seen on the market are very dry, and the water content will not be higher than 0.1%, so the powder coatings we see are all powdery and very easy to raise dust.

The powder coating in this state is driven by high pressure and gas, which is very easy to disperse, so it is also very uniform when spraying.

However, once the powder coating is moistened with water, it will become a clump of clumps, and it will be difficult for the high-pressure air to even move, let alone disperse these clumps one by one.

But if high-pressure hedging is used, then the question is no longer a problem, just what kind of structure can make high-pressure hedging without affecting the moisture on the surface of the powder coating.

Because the powder coating is wet, it is mainly the moisture that adheres to the surface of the coated object. You have to find the latest chapters by yourself to read books?