Mobile phone shielding cover is mainly used to surround the interference sources of components, circuits, assemblies, cables or the entire system, to prevent the spread of interference electromagnetic fields outward. Usually, 0.2mm thick stainless steel and phosphor bronze are used as materials. During the production process, some abnormalities may occur. Below, the Bosi editor summarizes several situations where abnormalities occur for your reference

Five situations of abnormal quality of mobile phone shielding cover

　　1、 There are two types of pressure injuries on the inner and outer surfaces of the product, as well as on the bent inner and outer sides:

(1) Small hole jumping waste, large hole jumping waste: Long term production causes wear and tear on the punch blade, resulting in increased clearance and inability to hold the waste, which is carried out of the mold surface by the punch and causes pressure damage

(2) Powder chip crushing injury: The clearance between the punch and the cutting edge is too large or too small, resulting in powder chips scattering on the mold surface. When the material passes through the leveling machine and feeding machine, there may be dust and fine iron filings inside the machine that can directly damage the product.

　　2、 Product small hole cutting edge burrs and continuous cutting belt folding burrs:

The gap between the punch and the blade is too large, causing burrs or the punch to deviate to one side, resulting in burrs on one side and no burrs on the other. ourMobile phone shielding coverSome of the last steps involve a continuous cutting and folding structure, which can cause wear and tear on the punch after a period of production, leading to the formation of burrs.

In the final step, due to the failure to press or bend the punch to pull the material, the product produces an odor, causing one side to cut more and the other side to cut less. The missing side will protrude and cause dimensional defects. Sometimes in the final step, the guide needle may break the material, causing unstable bending and cutting dimensions.

　　3、 Less holes on the front and side of the product:

The punching head broke during production without adding punching and cutting oil; The small hole waste was blocked in the leakage hole due to too much refueling, causing the punch to break; Move the foot pad to block the leakage hole; Blocking the leakage hole with the suction funnel will break the punch head.

　　4、 Bending angle external tension and internal buckle:

Externally stretched, the mold is not crushed; High pressure waste material inside the mold, product; The gap between the bending punch and the insert becomes larger; Bending inserts with worn or broken reinforcing bars can cause outward angle stretching. Internal buckle, mold pressing too hard; The pressure bar of the bent insert is too high; The gap between the bending punch and the insert is too small, which can cause angular inward buckling.

　　5、 Side scratches:

Wear of bending punch or bending insert; The gap between the bending punch and the insert is too small; There are waste materials in the bending punch and insert card; Insufficient refueling and waiting can lead to scratches.

The above is aboutWhat are the abnormal situations of mobile phone shielding cover： http://www.bosiwj.com/mp-03.html

I hope this knowledge can help you identify where the problem occurred and avoid any abnormal situations during production. If you are interested in shielding covers, I recommend a professional shielding cover manufacturer for you--Dongguan Bosi HardwareWe have introduced German CNC sampling technology, which allows for three-day sampling without mold opening. Please feel free to inquire for a quotation. Our quotation hotline is 13712595862 (same WeChat account).