Appearance structural part applied to intelligent terminal products and manufacturing method thereof

Abstract

The invention provides an appearance structural member applied to an intelligent terminal product and a manufacturing method of the appearance structural member. The appearance structural member comprises at least three metal structure layers, wherein the metal structure layers comprise an outermost metal structure layer and metal structure inner-layers from outside to inside by using a mosaic module principle, and the metal structure inner-layers at least comprise a second metal structure layer and a third metal structure layer; in every two adjacent metal structure layers, the length and the width of the relatively outer layer are greater than those of the relatively inner layer, and every two adjacent layers are connected together by pressure casting or molten metal casting and fusion; each metal structure layer is formed by gradation; except the outermost metal structure layer, the melting point of the firstly formed metal structure inner-layer is not more than that of the later formed metal structure inner-layer. The appearance structural member adopting the technical scheme is attractive in appearance, shrinkage distortion is reduced, the product percent of pass is improved, and meanwhile the failure risks of product distortion, junction cracking and the like caused by subsequent stress release are lowered.

Description

technical field [0001] The invention belongs to the technical field of production of intelligent terminal appearance structural parts, and relates to an appearance structural part of an intelligent terminal product and a manufacturing method thereof, in particular to a metal appearance structural part of an intelligent terminal product and a manufacturing method thereof. Background technique [0002] With the rapid development of electronic products, smart terminals such as smart wearable devices, tablet computers, and smart homes are becoming more and more popular, and people have higher and higher requirements for the appearance of smart terminals. At present, many companies have carried out a lot of research on this Research, in the prior art, some surface metal parts with concave cavity or binding features are assembled with internal features or complex internal structural parts through injection mold injection. This method is suitable for internal features or complex int...

AI Technical Summary

Problems solved by technology

[0002] With the rapid development of electronic products, smart terminals such as smart wearable devices, tablet computers, and smart homes are becoming more and more popular, and people have higher and higher requirements for the appearance of smart terminals. At present, many companies have carried out a lot of research on this Research, in the prior art, some surface metal parts with concave cavity or binding features are assembled with internal features or complex internal structural parts through injection mold injection. This method is suitable for internal features or complex internal structural parts Easy, but the injection molded plastic internal features or complex internal structural parts have poor strength, and at the junction of metal and plastic, due to the plastic internal features or complex internal structural parts cooling and shrinking, there are internal stresses that are difficult to eliminate, resulting in the structure Deformation; In addition, due to the strength of the plastic, the internal characteristics of the plastic formed by injection molding or the strength of the complex internal structural parts of the plastic can no longer meet the thinning and refined requirements of the appearance and structural parts of today's smart terminals

[0003] In addition, there are existing schemes that completely use metal materials to prepare appearance structural parts. The metal outer shell with high appearance requirements is formed by metal stamping, forging or machining, and the inner shell with complex structure that does not have high appearance requirements It is formed by metal die-casting, which meets the thinning and refined requirements of today's intelligent terminal appearance structural parts, but there are problems such as excessive internal stress at the junction of the inner and outer layers, product warping and deformation, and excessive flatness; and as Over time, defects such as cracks or cracks will occur at the junction of the inner and outer layers

The gate of the die-casting mold structure it adopts is located on the side of the product. The vector direction of the pressure during the die-casting process is from the outer side of one side of the product to the inner side of the opposite side. The eddy current formed during the die-casting process exists in the feed On the inner side of the edge, the strong die-casting pressure will deform the outermost metal structure or cause flow marks on the outermost layer, and make the connection strength of the two layers of materials very poor, requiring more CNC processing time in the later stage

Moreover, the yield rate of blanks adopting this technical solution is very low, below 50%.

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