Metal materials for the casing of the mobile phone are available in stainless steel, aluminum-magnesium alloys and titanium and alloys thereof. Stainless steel and aluminum-magnesium alloys have been widely used in the home appliance industry, and commercial housings have mature production technologies at home and abroad.
In recent years, with the emergence of new applications of titanium in the civilian field, researchers began to study the production technology of titanium metal mobile phone casing. Titanium metal phone case manufacturing technology generally adopts methods of casting molding, plastic injection molding, punching and forging composite forming, continuous stamping forming, and welding, and requires a mold for punching. With the increasing application of light metal materials (aluminum, magnesium, titanium alloys), there has recently been a glue process that can replace welding technology.
Taiwan has a lot of research on the manufacture of titanium mobile phone casings. For example, the Taiwan Metal Industry Research and Development Center has a series of production technologies for precision forming, thin plate bonding and anode coloring of titanium metal shells. The center also established a database of bending springback and tensile limit of titanium plate thickness 0.4-0.6cm. The punching and forging composite forming technology, that is, the punching and forging continuous mode precision composite forming technology, is a new technology developed in China recently. In the continuous mold, punching, bending, stretching, scraping and other stamping techniques and cold forging techniques such as flattening, embossing, shrinking, and extrusion are included. Many of the components used in welding of computers, communications, consumer electronics, and mechanical components are now available in glue. The advantage of gluing is higher strength and lower cost.