屏蔽罩

　　Since most of the shielding covers are made of white copper, they are produced by stamping. However, when many manufacturers produce white copper shielding covers, there are always some concerns about how to clean the products. The guidance of the cleaning agent manufacturer, but some bad problems in the middle have not yet been understood. The following editor summarizes the common adverse phenomena that occur in cleaning.

The bad phenomenon of white copper shielding cover in cleaning:

一. Determination of oil removal effect

The cleaned shield is rinsed and then dried. If there is a certain amount of similar dirt on the surface, first we use a clean cloth dipped in a little white electric oil or alcohol to wipe the surface of the workpiece. The action must be light, and only lightly wipe the surface.

Then observe whether the dirt still exists,

1. If it does not exist, it means that the cleaning agent is not good for cleaning.

2. It still exists, then rub it with a little more force, don't use too much force, just focus more on it than before.

If it still exists, then rub it vigorously again to see if it still exists. At the same time, take some uncleaned workpieces and wipe them gently to see if there is the same dirt that cannot be wiped off.

If there is the same, then find the reason from the previous processing process, eliminate the generation of such stubborn dirt from the source, and do not affect the subsequent cleaning for the sake of temporary convenience. Even if the cleaning agent can be washed away, it will greatly increase the cost of cleaning consumption. .

3. No, it means that the dirt can be removed, but it is more stubborn. It is considered that the cleaning agent is ok in removing oil, but it has a poor effect on this little stubborn dirt.

二. The phenomenon of fingerprints

The cleaned shield has fingerprints that cannot be removed. We have to first explain that water-based cleaning agents can clean handprints, but only for slightly dirty handprints, and for large areas of heavily soiled handprints, it cannot be completely removed. Of course, when there is a handprint, first of all we also use the method of wiping. Generally speaking, the fingerprint will not exist once wiped, even if it is baked and dried.

If it cannot be removed by wiping, please wipe it with an unwashed shield with fingerprints.

If the fingerprints can be completely removed, then consider some factors during the cleaning process that make the fingerprints change so that they cannot be wiped off.

If the fingerprint on the unwashed shield still exists after wiping, then the fingerprint and the material of the shield have chemically reacted. This has occurred in many processing units and should be eliminated at the source.

Normally, the processing is done without touching it with your hands, and there will be no fingerprints. Please strengthen management and don't think it is impossible. There are many times when it is unnecessary to touch with your hands, which is unscientific.

三. The product turns yellow

Yellowing can be divided into several phenomena: overall, partial flakes, and spots.

1. The overall yellowing of the shielding cover, the longer the soaking time is, the more yellow or even black it becomes, it must be the problem of the cleaning agent.

2. Partially yellowing in pieces, on the one hand, we should also consider that the cleaning agent may have a corrosive effect on the copper material, and on the other hand, it may be that the residual cleaning solution is not clean and the macula appears in this aspect. The latter is the reason for the available wiping method if it can be wiped off.

3. The yellowing of spots is similar to the local possible reasons, and there are many factors that tend to be unclean or incomplete in rinsing.

四. Watermark

The appearance of watermark is generally a problem of rinsing water quality. First check whether the pure water equipment is normal; secondly check the water quality in the rinsing tank. The simple method is to take a clean shield and wipe it with alcohol and so on without any smudges. After soaking in the rinse water, dry it with a hair dryer to see if there is a watermark. If there is, it should be the problem of the water quality in front.

If there is no watermark after drying with the hair dryer, put the shield in the drying equipment to dry in the same way. If there is a watermark, please clean the drying device, it should be caused by the dirt inside the device falling on the surface of the shielding cover during the drying process.

The above is the cause and solution of the bad phenomenon in the cleaning of the white copper shield:  http://www.bosiwj.com/mp-10.html

I hope that the major shielding cover manufacturers can help you when cleaning the white copper shielding cover. Dongguan Bosi shielding cover manufacturer has rich experience and mature technology in the field of foreign white copper shielding cover, and is willing to solve the problems for you. If you want to know more, you can continue to pay attention to our Bosi.