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Preparation method of mobile phone rear cover with three-dimensional background pattern

A technology of background pattern and mobile phone back cover, which is applied in the field of preparation of mobile phone back cover, can solve the problems of low 5G signal shielding and difficult processing of glass products, etc., achieve the effect of less process steps, overcome difficult processing, and simple production

Inactive Publication Date: 2018-12-21
KUNSHAN SANJING SCI & TECH
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  • Claims
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Problems solved by technology

[0004] In order to solve the problem of difficult processing of glass products, the present invention provides a method for preparing the back cover of a mobile phone with a three-dimensional background pattern. The present invention can prepare an integrated imitation glass 3D curved cover plate, which has strong plasticity and good impact resistance , 5G signal shielding is low, the loss of electromagnetic waves is small, the hardness is high, the wear resistance, corrosion resistance, high and low temperature impact resistance, and aging resistance are all good

Method used

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  • Preparation method of mobile phone rear cover with three-dimensional background pattern
  • Preparation method of mobile phone rear cover with three-dimensional background pattern

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Experimental program
Comparison scheme
Effect test

Embodiment

[0024] Embodiment Concrete processing steps:

[0025] 1) Injection molding:

[0026] The process steps of injection molding are: melting of plastic material → upper mold → debugging → mold closing → injection filling → pressure keeping → cooling → mold opening.

[0027] Optical grade transparent plastic is polymethyl methacrylate (PMMA) and / or polycarbonate (PC), which has good transparency, high strength and is not easy to scratch;

[0028] Preferably, in order to ensure plastic molding performance, the melting temperature of the material PMMA is 210~240°C; PC is 280~320°C;

[0029] Preferably, in order to better fill the mold and ensure the fluidity and filling degree of the melt, the injection pressure of the injection filling is 80~130MPa, and the injection time is 2~5s;

[0030] Preferably, in order to ensure uniform temperature of the melt and uniform mixing of materials, the pressure of the pressure-holding molding is 40-60 MPa, and the time of the pressure-holding mo...

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Abstract

The invention relates to a preparation method of a mobile phone rear cover with a three-dimensional background pattern. The preparation method comprises the following steps: 1) injection moulding: performing injection moulding by using optical-grade transparent plastic; 2) hardening treatment: performing hardening treatment on the material subjected to the injection moulding, wherein hardening liquid is prepared from urethane acrylate and an initiator in a mass ratio of 100 to (3 to 8); the thickness of the hardened coating is 5-20 microns; 3) processing with a numerically-controlled machine tool: performing outline processing on the hardened material by using a numerically-controlled machine tool; 4) preparation of a pattern explosion-proof film; 5) fitting: fitting the semifinished material processed by the numerically-controlled machine tool in the step 3) with the explosion-proof film prepared in the step 4), to obtain an integrated glass-imitating cover plate. The cover plate prepared by the method has strong plasticity and good impact resistance.

Description

technical field [0001] The invention relates to a preparation method of a mobile phone back cover, in particular to a preparation method of a plastic mobile phone back cover. Background technique [0002] Glass products have been widely used in all aspects of society, but glass has inherent defects such as poor heat insulation, poor impact resistance, and difficult processing, which make it impossible to apply in many occasions. As a substitute for glass products, optical plastic products have the advantages of high light transmission, light weight, weather resistance, impact resistance, easy molding, and low cost. They are widely used in optical instruments and electronics industries instead of glass products. Common plastic products include PC, PMMA, PA, PET and other engineering plastics, which have been widely used in spectacle lenses, lenses, instrument panels, display screens, covers and other fields. [0003] However, plastic products also have some inherent defects,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B37/12B32B27/36B32B33/00B32B27/30B32B27/08H04M1/02C08J7/04C08L33/12C08L69/00
CPCB32B27/08B32B27/308B32B27/36B32B33/00B32B37/12C08J7/04C08J2333/12C08J2369/00C08J2475/14H04M1/0283
Inventor 许一青黄超
Owner KUNSHAN SANJING SCI & TECH
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