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Plastic casing and preparation method

A plastic shell and transparent plastic technology, applied in polyurea/polyurethane coatings, other household appliances, household appliances, etc., to achieve the effects of improving life expectancy, improving product pass-through rate, and improving efficiency

Inactive Publication Date: 2020-12-22
BIEL OPTIC HUIZHOU
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The invention provides a plastic casing and a preparation method, which solves many problems in the process of using optical-grade transparent plastics to make plastic casings

Method used

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  • Plastic casing and preparation method
  • Plastic casing and preparation method
  • Plastic casing and preparation method

Examples

Experimental program
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Effect test

specific Embodiment approach 1

[0033] Such as image 3 , 4 The shown plastic shell 6 includes a light-shielding layer 5, a reflective layer 4, a shell layer 1, a texture layer 2 and a hardened layer 3 in sequence. Layer 3 is located outside the shell layer 1 of the plastic shell. The thickness of the shell layer 1 is 0.3-5.0mm, and the thickness of the hardened layer 3 is 5-35um. Of course, the thickness of the shell layer and the hardened layer can also be set according to actual needs.

[0034] Such as figure 1 As shown in the flow chart, the specific steps of the above-mentioned method for preparing a plastic shell are as follows:

[0035] Step 1: Injection molding, according to different actual needs, use optical-grade transparent plastic, and use textured metal mold cores for injection molding. The injection molding process is filled with injection molding. The injection molding conditions are: temperature 100-350 ° C The pressure is 10-190Mpa, the pressure of the pressure-holding molding is 10-98MP...

specific Embodiment approach 2

[0042] The setting conditions of specific implementation mode 2 and specific implementation mode 1 are basically the same, the main difference is that: if figure 2 As shown, when preparing the light-shielding layer in step five, the colored film with light-shielding effect is cut and attached to the plastic shell to form the light-shielding layer. Among them, the colored film is a viscous glue layer and colored plastic film or an explosion-proof film with silk screen colored ink. When the colored film is bonded to the plastic shell, it is vacuum bonded, and the bonding temperature is 10-190 ° C. . In this embodiment, the viscous glue layer and colored plastic film are high-temperature-resistant glue and black PET plastic film, and the bonding temperature is 100°C. Of course, other equivalent materials can also be used as the colored film.

specific Embodiment approach 3

[0044] The setting conditions of the third embodiment are basically the same as those of the first embodiment, the main difference is that in the first step, the texture is formed on the outer surface of the plastic casing and the middle frame. At the same time, the injection molding conditions in this example are as follows: temperature is 350°C, injection pressure is 190Mpa, pressure-holding molding pressure is 98MPa, pressure-holding molding time is 180s, and the thickness of the plastic shell after injection molding is 5.0mm. The conditions for forming a functional coating on the surface of the plastic shell in step 2 are set as follows: baking by infrared rays at a baking temperature of 145° C. for 120 minutes to form a 40um functional coating on the surface of the plastic shell. During the CNC machine tool processing in step 3, the spindle speed of the CNC machine tool is 90000 rpm, and the feed rate is 3500 mm / min. In step 4, a mask is set, and a reflective layer is pla...

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Abstract

The invention discloses a plastic casing and a preparation method. The preparation method of the plastic casing comprises the following steps that step 1, injection molding is performed, specifically,optical-grade transparent plastic is adopted, meanwhile, injection molding is performed by the aid of a textured metal mold core, and the plastic casing in a required shape is formed; step 2, functionalization treatment is performed; step 3, machining by the aid of a numerically-controlled machine tool is performed, specifically, the hardened plastic casing is subjected to shape machining by theaid of the numerically-controlled machine tool; step 4, film coating is performed, a reflecting layer is prepared, specifically, the inner surface of the plastic casing machined by the numerically-controlled machine tool is coated with the film in a magnetron sputtering, CVD or evaporation manner, and the reflecting layer is formed; step 5, a shading layer is prepared, specifically, the shading material completely covers the inner surface of the plastic casing with a related technology, and the shading layer is formed; and step 6, the required plastic casing is formed finally through steps 1 to 5. According to the method, a plurality of problems existing in a technology for producing the plastic casing from the optical-grade transparent plastic are solved.

Description

technical field [0001] The invention relates to the field of plastic shells, in particular to a production process and preparation method of a plastic shell. Background technique [0002] Mobile phones, computers, tablets, VR and other electronic products are smart devices that are often used now, and their shell settings are particularly important. At present, the materials used for the casings of existing electronic products such as mobile phones and display screens are generally glass, ceramics, metal and plastics. However, with the rise of wireless charging and 4G and 5G materials, metals will shield electromagnetic waves, making wireless charging and 4G and 5G signal transmission impossible, and are gradually eliminated. Ceramics and glass have a large specific gravity and are fragile, and the 3D shape is difficult to process and the cost is high. Plastics can be molded in one shot using injection molding, which is easy to process and low in cost. Common plastic prod...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B29D99/00C09D175/14
CPCB29D99/006C09D175/14
Inventor 杨建文陈振宇朱思伟
Owner BIEL OPTIC HUIZHOU
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