8352 results about "Die casting" patented technology

The invention relates to a mobile phone shell and a machining method thereof. The mobile phone shell comprises an outer shell and an inner shell, wherein the outer shell is formed by metal stamping, forging or injecting; inserts are welded or a concave part is formed in the inner side of the shell; the inner shell is formed on the inner side of the outer shell by metal die-casting; and the materials of the inner shell combine the outer shell and the inner shell together by surrounding the inserts or filling into the concave part. The machining method comprises the following steps: step 1, the outer shell is formed by metal stamping, forging or injecting; step 2, the inserts are welded or the concave part is formed in the inner side of the outer shell; and step 3, the outer shell is put into a die-casting mould, and the inner shell is cast and formed on the inner side of the outer shell. According to the mobile phone shell provided by the invention, the outer shell with a high appearance requirement is formed by metal stamping, forging or injecting, and the inner shell with a low appearance requirement and with a complicated structure is formed by metal die-casting, so that the appearance requirement of the mobile phone shell is guaranteed and the machining amount of cutting machining is reduced, so that the machining time can be reduced by at most 95% and the cost of the metal mobile phone shell is greatly reduced.

The invention provides a short-flow preparation method of micro-sized spherical titanium powder, which belongs to the technical field of powder preparation. The hydrogenation-dehydrogenation technique and the radio frequency plasma body fusion spheroidization technique are integrated, and the titanium hydride powder is selected as raw material; the titanium hydride powder absorbs heat in the high-temperature plasma and quickly decomposes and dehydrogenates, and the titanium hydride power is cracked and crushed in the process of dehydrogenation to produce the micro-sized titanium powder. By using the method, the processes of the dehydrogenation and the spheroidization of the generated titanium powder are finished in one step directly through the plasma processing, and the short-flow preparation of the micro-sized spherical titanium powder is realized. The invention has the advantages that the hydrogenation-dehydrogenation technique and the radio frequency plasma fusion spheroidization technique are combined, so as to shorten the production flow, enhance the production efficiency and reduce the production cost. Simultaneously, the prepared spherical titanium power has fine and even particles, good liquidity, high sphericity and low oxygen content, thereby the requirements of technical industrial production such as the injection figuration, the gel die casting figuration, and the like are satisfied.