With mobile phones, computers GPS、 As some digital products become more and more popular and demand increases, more and more shielding covers are needed. So, what should shielding cover manufacturers pay attention to when producing shielding covers to ensure the production of high-quality products. Below, the editor will popularize the precautions for producing shielding covers and which technical requirements need to be paid attention to

Precautions for producing shielding covers

　　shield canGenerally, stainless steel bending processing, deep drawing, tin plated steel strip, tin plate, etc. are used. Require no oil stains, no burrs, no scratches, no deformation, with a stamping tolerance within 0.1mm. The size of the sampling point for the shielding cover should be appropriate, preferably in the middle of the material. The size of the sampling point should be preferably Φ 6.0mm. The larger the sampling point, the higher the stability and efficiency of the patch.

The flow space of the tray where the shielding cover is placed is too large, and it is easy to swing during surface mounting, causing it to be difficult to absorb. It is necessary to place the material in the tray, which has a flow space of about 1.0mm. If it is too large, it will cause the material to swing, and if it is too small, it may not be able to retrieve the material.

Precautions for the production of shielding brackets

The surrounding walls of the shielding bracket should have one to two through holes with a diameter of 0.7~1mm on each side, which are used to clamp the shielding cover. There should not be too many card holes, otherwise it will be difficult to disassemble. The supplier can provide the location and size. The bottom surface of the surrounding walls of the shielding cover should be 0.5mm away from the PCB to prevent the shielding bracket from eating too much tin and pressing against the shielding cover. The diameter of the heat dissipation hole of the shielding cover is 1mm. If there is a flat drop in the shielding cover or shielding bracket, pay attention to cutting through the side at the boundary of the drop, otherwise it cannot be processed.

In addition, a hole with a diameter of 3mm should be drilled at the corner of the drop in the plane, otherwise it will tear. If the shielding cover or shielding bracket has a drop in the plane, pay attention to the drop angle of 35-40 degrees. If the angle is too large, it will crack during processing. If the shielding cover or shielding bracket has a drop in the plane, the gap between the bracket and the cover surface at the drop should not be 0, but should be 0.1mm.

The gap between the metal shielding cover and the shielding bracket plane should be at least 1mm away from the outer wall of the side wall. If there is a downward bend inside, the distance between the bent side wall and the outer wall should be 0.5mm. At this time, the plane should be directly attached to the gap 15 of the side wall. The inner angle of the shielding bracket gap area should be R0.5mm. The shielding bracket and PCB should not be welded on the whole surface, but should be welded with a 2-1-2-1mm Great Wall foot, with a 2mm connection and 16 contacts, and 1mm suspended for easy tin climbing. The metal shielding cover can increase the adhesion strength of the shielding cover in this way.

The above is aboutPrecautions for producing shielding covers： http://www.bosiwj.com/mp-04.html

I hope this knowledge can be helpful to you. Our company's mobile phone shielding case is mainly made of 0.2mm phosphor bronze and stainless steel stamping. We can provide products with precise dimensions, good flatness, easy tinning, good shielding function, easy and firm assembly, and excellent quality.