Shenzhen Ligao Precision Mould Co., Ltd. is a professional manufacturer of positioning contact shrapnel, lathe parts and metal stamping parts. Power supply positioning shrapnel. The factory has advanced technology and equipment, modern workshops and professionals, and its products sell well all over the world. The positioning contact shrapnel (also known as the metal dome, snap dome) is made of ultra-thin (0.05mm-0.1mm thickness) and ultra-thick (generally higher hardness) stainless steel 301 or 304 materials. The metal shrapnel is an important part of the switch. Metal shrapnel are mainly used in membrane switches, contact switches, PCB boards, FPC boards, medical devices and other products. The working principle of the power positioning shrapnel: The metal shrapnel on the membrane button is located on the conductive part of the PCB board (mostly located above the golden fingers on the circuit board). When pressed, the center point of the shrapnel is concave and contacts the PCB. The circuit shrapnel, thus forming a loop, through which the entire product can work normally. Generally, conventional metal shrapnel shrapnel can be divided into round metal shrapnel, cross-shaped metal shrapnel, triangular metal shrapnel, and oval metal shrapnel according to their different shapes. The diameter ranges from 3mm to 20mm, and the strength ranges from 100g to 600gf. Of course, if you have special requirements to make according to your drawings, there is no problem. In addition, according to the customer's requirements for resistance, the spring shrapnel, our positioning contact shrapnel also has a variety of surface treatments such as nickel plating, silver plating, and gold plating. "Meeting the needs of customers is our eternal pursuit!" We will serve you wholeheartedly!