30 years focus on precision metal stamping processing, professional processing and production of mobile phone shell, precision terminals, precision stamping parts.
Because professional so focus!
Mobile phone shell, have a primary key (
The number keys, which are in contact, function keys)
And the side button (
Generally refers to mobile phone shell under the side buttons, such as volume control buttons)
It shows certain radian, raised face up, concave down contact PCB/FPC board, the circuit board on the bottom of plastic buttons and between plays a conducting role.
Because buckle the shape similar to a pot, so also known as' pot '.
The shell material is stainless steel, hardness is in commonly 350 hv to 550 hv.
After die stamping, is cleaning artifacts.
The surface of the cell phone shell is generally not through special processing, is bare of stainless steel material.
Because the lines on the surface of the bare wood is uneven, so when the current through the resistance value is not stable, resulting from resistance is relatively large.
If the resistance stability, low resistance, then it is shell surface through special processing.
Now on the market generally gold-plated, silver plating, nickel plating, galvanized, resistance can be controlled within 1 ohm.
Metal shrapnel common round or oval shape is circular and the waist, the most commonly used for 4 mm and 5 mm diameter.
There are two.
Common efforts for 130 gf, 160 gf, 180 gf.
According to the mobile phone shell center if there is a belt concave/convex points are divided into point and without a point.
General nickel plating shrapnel in the majority for a bit, for plating silver bullet piece is no point to give priority to, stainless steel shrapnel is both.
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