Preparation method of middle frame and electronic equipment middle frame

Abstract

The invention provides a preparation method of a middle frame and an electronic equipment middle frame. The method comprises the following steps that a plurality of aluminum strips are provided; the plurality of aluminum strips are arranged at intervals to define a rectangular frame with gaps; CNC machining is carried out on the peripheral face of the frame so that grooves can be formed in the portions, on the two sides of the gaps, of the aluminum strips, and laser etching is carried out on the grooves so that concave-convex structures can be formed on the inner sides of the grooves; molten aluminum liquid is injected into a die-casting die through a die-casting treatment process after laser etching, the die-casting die is filled with the molten aluminum liquid, part of the molten aluminum liquid is solidified to form a middle plate integrally formed with the aluminum strips, the gaps and the grooves are filled with the remaining molten aluminum liquid, the remaining molten aluminum liquid is solidified to form filling aluminum materials, and the aluminum strips are connected together in series through the filling aluminum materials and integrally formed with the middle plate; and the redundant parts of the aluminum strips in the gaps and on the two sides of the gaps are removed through CNC machining, and the remaining filling aluminum materials fixedly hold the gaps and the aluminum strips on the two sides on the outer side of the frame. By means of the method, a filling aluminum material mechanical structure is additionally arranged on the outer side to be combined with each other, meanwhile, a mutual locking function is achieved, and the situation of breakage and separation in subsequent machining is avoided.

Description

technical field [0001] The invention relates to the technical field of electronic product processing, in particular to a method for preparing a middle frame and a middle frame of an electronic device. Background technique [0002] In order to enable the mobile terminal to receive and send information smoothly, the middle frame of the mobile terminal is provided with a gap formed by the antenna partition, and the antenna module is fixed inside and set opposite to the gap of the middle frame to realize coupling and feeding with the gap of the middle frame. In the process of preparing the middle frame and antenna, the inner peripheral surface of the middle frame is usually laser-carved to form a concave-convex structure, and then the aluminum strip of the outer frame is placed in a die-casting mold for die-casting, and the die-casting aluminum melt is poured and filled. The aluminum strips of the outer frame are combined with the die-casting aluminum through the concave-convex ...

AI Technical Summary

Problems solved by technology

Two aluminum strips 11 are arranged at intervals to form a frame, and the inner side of the aluminum strips is engraved with radium to form a concave-convex structure 13; the gap 12 between the two aluminum strips is used as a part of the antenna of the terminal, and is formed after die-casting figure 2 Structure, the die-casting aluminum 15 is connected with two aluminum strips 11, and the part of the die-casting aluminum filled inside the frame forms the middle plate 14. In addition, the middle plate 14 leaves a certain margin on the aluminum strips around the gap, that is, the hollow part 16 is used to accommodate the antenna mold. At the same time, another part of the die-casting aluminum also fills the gap 12, the die-casting aluminum 15 in the gap is integrally formed with the middle plate 14, and the middle plate 14 is connected with the concave-convex structure 13 inside the aluminum strip 11, so that the die-casting aluminum in the gap 12 passes through the middle plate 14 and the concave-convex structure 13 connect the aluminum strips 11 on both sides; however, after subsequent CNC processing, part of the structure of the aluminum strip 11 around the gap 12, and part of the die-cast aluminum in the gap 12 and the connection between the middle plate 14 and the aluminum strip 11 are removed. Part of the structure, and the thickness of the die-casting aluminum 15 in the gap is only 0.6MM wide connection area, which greatly weakens the connection between the aluminum strip 11 around the gap 12 and the middle plate 14, and also weakens the connection between the aluminum strips 11 on both sides of the gap 12 At this time, it is easy to break the frame from the gap 12

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