阅读说明：本技术 一种电池后盖的制备方法 (Preparation method of battery rear cover ) 是由 龙贤辉 雷小红 陈剑 于 2019-09-17 设计创作，主要内容包括：本发明涉及电池后盖的领域,公开一种电池后盖的制备方法,包括：将塑胶粒通过注塑工艺形成具有双曲面结构的透明外壳本体；对所述外壳本体中用于与所述电池接触的内表面上形成图案层；对所述外壳本体中用于外露的外表面进行耐磨工艺处理以形成透明耐磨层,能够解决现在的双曲面的手机电池后盖在塑料材质下不具有仿玻璃效果的问题。(The invention relates to the field of battery rear covers, and discloses a preparation method of a battery rear cover, which comprises the following steps: forming a transparent shell body with a hyperboloid structure by plastic particles through an injection molding process; forming a patterned layer on an inner surface of the case body for contact with the battery; and the outer surface used for exposure in the shell body is subjected to wear-resistant process treatment to form a transparent wear-resistant layer, so that the problem that the conventional double-curved-surface mobile phone battery rear cover does not have a glass-like effect under a plastic material can be solved.)

1. A preparation method of a battery rear cover is characterized by comprising the following steps: forming a transparent shell body with a hyperboloid structure by plastic particles through an injection molding process;

forming a patterned layer on an inner surface of the case body for contact with the battery;

and carrying out abrasion-resistant process treatment on the outer surface for exposure in the shell body to form a transparent abrasion-resistant layer.

2. The method of claim 1, wherein the pattern layer is formed by a surface treatment process of a plastic product.

3. The method of claim 1, wherein the pattern layer is formed by an optical coating process.

4. The method of manufacturing a rear cover for a battery according to claim 1, wherein the pattern layer is formed by a general spray coating process.

5. The method of claim 1, wherein the pattern layer is formed by a film-attaching process.

6. The method of manufacturing a rear cover for a battery according to claim 1, wherein the wear-resistant layer is formed by a curtain coating process.

7. The method of manufacturing a rear cover for a battery according to claim 1, wherein the wear-resistant layer is formed through a dip-dyeing process.

8. The method of claim 1, wherein the housing body is screen printed with indicia on an inner surface for contacting the battery before the housing body is patterned.

9. The method of manufacturing a rear cover for a battery as claimed in claim 8, wherein the housing is subjected to numerical control machining after the transparent wear-resistant layer is formed on the housing body to form the rear cover for a battery.

Technical Field

The invention relates to the technical field of battery rear covers, in particular to a preparation method of a battery rear cover.

Background

The materials of the mobile phone shell are recycled from plastic to metal to nonmetal materials, and the plastic is favored by middle and low-end markets due to low cost.

In the production of the mobile phone battery rear cover, the product appearance effect achieved by the IMT injection molding process and the composite board is not obviously different, but the composite board is unstable in product shape after hot-press molding, and the composite board can only be used as the mobile phone battery rear cover with a sheet-shaped single-curved-surface structure, so that the application scene is limited; and the IMT injection molding process can be used as an integrated rear cover with double curved surfaces and has a colorful effect, but all effects are realized on the surface of a product, the penetrating feeling of glass is lacked, and the effect of imitating the glass cannot be achieved.

Disclosure of Invention

The invention discloses a preparation method of a rear cover of a battery, which can solve the problem that the conventional double-curved-surface rear cover of a mobile phone battery does not have a glass-like effect under the condition of plastic materials.

In order to achieve the purpose, the invention provides the following technical scheme: a method for preparing a rear cover of a battery comprises the following steps: forming a transparent shell body with a hyperboloid structure by plastic particles through an injection molding process;

forming a patterned layer on an inner surface of the case body for contact with the battery;

and carrying out abrasion-resistant process treatment on the outer surface for exposure in the shell body to form a transparent abrasion-resistant layer.

The plastic particles are injected by an injection molding process to form a transparent mobile phone shell with a double curved surface, the double curved surface structure realized by mold injection molding can enlarge the application range of the mobile phone shell, the shape of the mold for injection molding is determined, so that the size of a mobile phone shell product produced by injection molding is stable, and a pattern layer is formed on the inner surface of the shell body, which is in contact with a battery, so that the color and the pattern are made on the back surface of the transparent plastic mobile phone shell, and the mobile phone battery shell has the transparency of glass and is bright in appearance by the processing mode; after the outer surface used for exposing in the shell body is subjected to wear-resisting process treatment to form the pattern layer, the surface of the mobile phone shell has a mirror effect and is more wear-resisting.

Further, the pattern layer is formed through a surface treatment process of the plastic product.

Further, the pattern layer is formed through an optical coating process.

Further, the pattern layer is formed by a general spray coating process.

Further, the pattern layer is formed by a film attaching process.

Further, the wear-resistant layer is formed through a flow coating process.

Further, the wear resistant layer is formed by a dip dyeing process.

Further, before the housing body forms the pattern layer, the housing body is used for carrying out screen printing on the inner surface which is in contact with the battery to form a mark.

Further, after the transparent wear-resistant layer is formed on the shell body, the shell is subjected to numerical control machining to form the rear battery cover.

Drawings

Fig. 1 is a process flow diagram provided in an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

As shown in fig. 1, an embodiment of the present invention provides a method for manufacturing a rear cover of a battery, including: forming a transparent shell body with a hyperboloid structure by plastic particles through an injection molding process; forming a pattern layer on an inner surface of the case body for contacting the battery; and carrying out abrasion-resistant treatment on the outer surface for exposure in the shell body to form a transparent abrasion-resistant layer.

Because the prior mobile phone shell is recycled from plastic to metal and to non-metal materials, and the plastic mobile phone shell is taken as the leading material, the common plastic mobile phone shell is manufactured by a composite board or an IMT process, but the glass imitation effect can be realized by carrying out dip-coating dyeing on the front surface, back printing and film plating on the composite board, but the problem of unstable product size can occur in the shape of a product produced by high-pressure forming due to the high-pressure forming process in the processing process of the composite board, the composite board can only be made into a sheet-shaped and single-curved-surface structure, the composite board is formed by hot pressing, and the sheet can only be made into a single-curved-surface structure if the composite board is made into four corners of a double-curved-surface full-package structure and is hot pressed and wrinkles, so that the shell can only be made into a single-curved-surface structure; although the mobile phone shell manufactured by the IMT process has a colorful effect, the production process is that the membrane printed with patterns is placed in a mold for injection molding, the membrane bearing the printed patterns needs to be torn off after the injection molding is finished, then UV paint is sprayed on the surface to protect the membrane so as to increase the wear resistance of the membrane, and the patterns lack the penetrating feeling of glass on the appearance surface of the product.

However, in the preparation method of the rear cover of the battery provided by the embodiment of the invention, plastic particles are injected by an injection molding process to form the transparent mobile phone shell with a hyperboloid, the hyperboloid structure realized by mold injection can expand the application range of the mobile phone shell, the shape of the mold for injection molding is determined, so that the size of the mobile phone shell product generated by injection molding is stable, and the color and the pattern are made on the back surface of the transparent plastic mobile phone shell by forming the pattern layer on the inner surface of the shell body contacted with the battery, so that the mobile phone battery shell has the transparency of glass and is bright in appearance; after the outer surface used for exposing in the shell body is subjected to wear-resisting process treatment to form the pattern layer, the surface of the mobile phone shell has a mirror effect and is more wear-resisting.

The pattern layer is formed in various ways:

in the first method, the pattern layer is formed by a surface treatment process of the plastic product, that is, by a Non-Conductive Vacuum Metallization (NVCM) process, such a treatment method is used for the surface treatment of the plastic product;

in the second mode, the pattern layer is formed by an optical coating process, namely an OPVD process method, the optical coating adopts a nanometer level, and the greasy feeling and the texture are stronger.

And in a third mode, the pattern layer is formed by a common spraying process.

In a fourth mode, the pattern layer is formed by a film pasting process. In the film-coating process, a film is required to be used for coating on the inner surface of the mobile phone shell for contacting with the battery, and then the film is coated by a film-coating machine.

The outer surface used for exposing in the shell body is subjected to wear-resisting process treatment to form a transparent wear-resisting layer, and the specific wear-resisting layer has multiple treatment modes:

in the first mode, the wear-resistant layer is formed through a curtain coating process, and the exposed outer surface of the mobile phone shell is treated through the curtain coating process, so that the hardness of the surface of the product is increased, and the wear resistance of the product is improved.

And in the second mode, the wear-resistant layer is formed through a dip dyeing process, and the exposed outer surface of the mobile phone shell is treated through the dip dyeing process, so that the hardness of the surface of the product is increased, and the wear resistance of the product is improved.

Before the housing body forms the pattern layer, the inner surface of the housing body for contacting with the battery is subjected to screen printing to form a mark, and specific mark characters or patterns and the like are mainly based on actual requirements and are not specifically limited herein. Specifically, the silk screen printing refers to that a silk screen is used as a plate base, and a silk screen printing plate with pictures and texts is manufactured through a photosensitive plate making method.

And after the transparent wear-resistant layer is formed on the shell body, carrying out numerical control processing on the shell to form the battery rear cover.

Numerical control machining, namely CNC, is short for numerical control, and numerical control technology is a method for controlling mechanical motion and a machining process by utilizing digital information. And (4) processing the uneven edges of the redundant part or burrs and the like of the mobile phone shell through numerical control processing.

It will be apparent to those skilled in the art that various changes and modifications may be made in the embodiments of the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.