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A kind of preparation method of metal case of communication equipment

A technology for metal shells and communication equipment, which is applied in the direction of metal shells, welding equipment, laser welding equipment, etc., and can solve problems such as product deformation, lack of seam width, and easy deformation

Active Publication Date: 2017-06-06
BYD CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] There are two main methods of processing slits at present. The first one is the traditional way of machining slits, such as grinding wheel cutting, CNC (numerical control machine tool), etc. This processing method has low precision and cannot meet our requirements. slit width, and in this cutting method, the blade / drill bit contacts the workpiece at high speed, which will generate mechanical stress on the workpiece, easily cause product deformation, and reduce the overall mechanical strength
The second is the method of laser cutting. Due to the effect of coaxial air blowing in the laser process, metal slag is generated on the lower surface of the metal substrate, so it is necessary to choose the sequence of cutting first and then injection molding, otherwise the slag will be mixed with the lower layer. The combination of plastics causes the slit area to be re-conducted, affecting the passage of electromagnetic waves
If the process of cutting first and then injection molding is adopted, the strength of the metal base material after cutting is low, and it is easy to deform after injection molding

Method used

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Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0013] The preparation method of the metal casing of communication equipment provided by the present invention comprises the following steps:

[0014] 1) providing a metal housing, the metal housing comprising a metal base and a plastic support layer attached to the inner surface of the metal base;

[0015] 2) Forming more than one slit on the metal substrate by laser etching, the slit penetrates through the metal substrate and does not penetrate the plastic support layer;

[0016] 3) Forming a decorative layer on the outer surface of the metal base.

[0017] In the present invention, the communication device may be, for example, a mobile phone, a tablet computer, a notebook computer, or a bluetooth headset.

[0018] In the present invention, the inner surface of the metal shell is defined as the surface of the metal shell facing the inside of the communication equipment when it is used in the communication equipment. It can be understood that the outer surface of the metal ...

Embodiment 1

[0044] 1) Injection molding

[0045] Aluminum alloy (purchased from Dongguan Gangxiang Metal Material Co., Ltd., grade 6063, thickness 0.4 mm) was cut into a size of 15 mm x 80 mm as a metal substrate. Degreasing and washing with water were performed on the above metal substrate to remove surface stains and oil stains, and then dried at 80° C. for 20 minutes to obtain the cleaned and dried metal substrate A11.

[0046] The above-mentioned metal matrix A11 is put into a mold, and polyphenylene sulfide resin is used for injection molding. The injection molding conditions are: injection pressure 1800bar, holding pressure 1000bar, when using an oil temperature machine, the temperature of the upper and lower molds is 100°C, and the injection time is 1.5s to form a plastic support layer (thickness 1.0mm), thereby obtaining a metal with a plastic support layer. Housing A12.

[0047] 2) Slits are formed by laser etching

[0048] An infrared laser (the model produced by HGLASER is L...

Embodiment 2

[0054] 1) Injection molding

[0055] According to the method of step 1) of Example 1, the metal shell A22 was obtained.

[0056] 2) Slits are formed by laser etching

[0057] The slit is processed on the metal shell A22 by using a green laser (the model produced by Huagong Laser is LSG7EI laser with a wavelength of 532nm). The width of the slit is 30 μm, the number of processed slits is 6, the length of the slit is 10 mm, and the distance between the slits is 0.6 mm. The power of laser processing is 7W, the speed is 60mm / s, and the frequency is 60kHz. A metal case A23 is obtained. The surface of the obtained slits was smooth and burr-free, and the conductivity of the slits was measured by a Fluke 175True RMS multimeter, and the result was that all 6 slits were not conducting.

[0058] 3) A surface decoration coating is formed by a micro-arc oxidation method.

[0059] Degrease the metal shell A23, and then immerse it in the micro-arc oxidation electrolyte (ingredients and ...

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Abstract

A method for manufacturing a communication device metal housing, the method comprising the following steps: 1) providing a metal housing, the metal housing comprising a metal base (100), and a plastic supporting layer (300) formed on an inner surface of the metal base; 2) etching via a laser to form a slit (200) on the metal base, the slit passing through the metal base and not passing through the plastic supporting layer; and 3) forming a decorative layer on an outer surface of the metal base.

Description

technical field [0001] The invention relates to a preparation method of a metal shell of communication equipment. Background technique [0002] With the development of metal processing technology, mobile communication devices such as mobile phones and tablet computers are increasingly inclined to use metal casings, especially large-area metal casings, but electromagnetic waves cannot penetrate metals. In order to achieve good electrical signal effects, metal casings are used. It is necessary to process single or multiple slits on the shell, and design the antenna at the slit. [0003] There are two main methods of processing slits at present. The first one is the traditional way of machining slits, such as grinding wheel cutting, CNC (numerical control machine tool), etc. This processing method has low precision and cannot meet our requirements. And in this cutting method, the blade / drill, etc. contact the workpiece at high speed, which will generate mechanical stress on th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B23K26/362H05K5/04
CPCH05K5/04B23K26/361
Inventor 赵桂网李孔林郭丽芬董明杰
Owner BYD CO LTD
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