Forming method of mobile phone back cover and mobile phone back cover

Abstract

The application relates to the technical field of mobile phone accessory forming, and discloses a forming method of a mobile phone back cover and the mobile phone back cover. The forming method of the mobile phone back cover comprises the following steps: performing surface treatment on a thermoplastic glass fiber plate, sequentially performing silk printing, optical coating and transparent light-cured glue transfer on the thermoplastic glass fiber plate after the surface treatment, obtaining a mobile phone back cover rough shape, pasting a natural leather on the mobile phone back cover rough shape, performing light curing, pasting a protective film and a cutting film, obtaining a mobile phone back cover base material, cutting the mobile phone back cover base material into a preset shape, and hot bending the mobile phone back cover base material into the preset shape to obtain the mobile phone back cover. The thermoplastic glass fiber plate is used as the base material, has good thermoplasticity and toughness, can be uniformly cut and hot bent after the natural leather is pasted, the waste of production materials is reduced, the production efficiency and the yield are improved, the mobile phone back cover is light and thin, and the use experience of users is improved.

Description

Technical Field

[0001] This invention relates to the field of mobile phone accessory molding technology, and in particular to a molding method for a mobile phone back cover and the mobile phone back cover itself. Background Technology

[0002] Vegan leather is a material that falls between genuine leather and leather, and it is waterproof, durable, and soft. It can be used in the molding of mobile phone back covers.

[0003] In the current process of molding mobile phone back covers, a blank is first formed by hot pressing or injection molding of thermosetting materials. Then, vegan leather is printed and applied onto the blank. Finally, a CNC machine tool is used to cut off the excess blank and vegan leather to ensure that the edges of the back cover are flat. Because the vegan leather is applied to each blank one by one, the production efficiency is low, the yield rate is low, and production materials are wasted. When applying the vegan leather, it needs to maintain a certain tension, which requires the vegan leather to be 0.5mm-0.6mm thick, making the finished mobile phone back cover thick and heavy.

[0004] Therefore, there is an urgent need to provide a molding method for a mobile phone back cover and a mobile phone back cover in order to solve the above problems. Summary of the Invention

[0005] Based on the above, one objective of the present invention is to provide a method for molding a mobile phone back cover, so as to solve the problems of low production efficiency, low yield, waste of production materials and heavy mobile phone back covers in the process of molding mobile phone back covers using vegan leather in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution:

[0007] A method for molding a mobile phone back cover includes the following steps:

[0008] Surface treatment of thermoplastic fiberglass board;

[0009] After surface treatment, the thermoplastic fiberglass board is sequentially screen-printed with patterns, optically coated, and then transferred with transparent light-curing adhesive to obtain the prototype of the mobile phone back cover.

[0010] A vegan leather is applied to the prototype of the phone back cover and then photocured. After applying a protective film and a cutting film, the phone back cover substrate is obtained.

[0011] The mobile phone back cover substrate is cut into a preset shape, and then the mobile phone back cover substrate cut into the preset shape is hot-bent to obtain the mobile phone back cover.

[0012] Furthermore, the glass fiberboard is impregnated to obtain thermoplastic glass fiberboard.

[0013] Furthermore, the impregnation solution is a modified thermoplastic epoxy resin.

[0014] Furthermore, the thermoplastic fiberglass board undergoes surface treatment by grinding or ultrasonic cleaning to ensure that the dyne value of the thermoplastic fiberglass board surface is not less than 38.

[0015] Furthermore, the photocuring energy of the prototype mobile phone back cover with vegan leather is 1000mj-1500mj, and the time is 5-10 seconds.

[0016] Furthermore, a pre-set pattern is screen-printed onto the thermoplastic fiberglass board using thermoplastic UV ink to form a screen-printed layer.

[0017] Furthermore, the thermoplastic UV ink is obtained by modifying epoxy polyacrylate or polyurethane-modified epoxy resin.

[0018] Based on the above, another objective of the present invention is to provide a mobile phone back cover that solves the problems of low production efficiency, low yield, waste of production materials, and heavy mobile phone back covers in the process of forming mobile phone back covers using vegan leather in the prior art.

[0019] To achieve the above objectives, the present invention adopts the following technical solution:

[0020] A mobile phone back cover, wherein the mobile phone back cover is formed according to the forming method of the mobile phone back cover described in any of the above embodiments.

[0021] Furthermore, the thickness of the vegan skin is 0.2 mm.

[0022] Furthermore, the thickness of the phone's back cover is 0.6 mm.

[0023] The beneficial effects of this invention are as follows:

[0024] The method for forming a mobile phone back cover provided by this invention includes the following steps: surface treatment of a thermoplastic fiberglass board; sequential screen printing of a pattern, optical coating, and transfer of transparent light-curing adhesive onto the surface-treated thermoplastic fiberglass board to obtain a prototype of the mobile phone back cover; application of a vegan leather backing onto the prototype, followed by light curing; application of a protective film and a cutting film to obtain a mobile phone back cover substrate; cutting the mobile phone back cover substrate into a preset shape; and hot-bending the pre-cut mobile phone back cover substrate to obtain the mobile phone back cover. Using thermoplastic fiberglass board as the substrate provides excellent thermoplasticity and toughness, allowing for unified cutting and hot-bending after the vegan leather backing is applied, eliminating the need for separate forming of the mobile phone back cover blank before applying the vegan leather backing, reducing material waste and improving production efficiency and yield. Since the vegan leather backing is applied before cutting and hot-bending, the surface tension of the vegan leather does not need to be too high, thus reducing its thickness and making the mobile phone back cover thinner and lighter, improving the user experience. Implementation

[0025] The present invention will be further described in detail below with reference to embodiments and implementation methods. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, only the parts relevant to the present invention are shown in the embodiments, not the entire structure.

[0026] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection or a detachable connection; a mechanical connection or an electrical connection; a direct connection or an indirect connection through an intermediate medium; or the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0027] In the description of this invention, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0028] The technical solution of the present invention will be further illustrated below with reference to embodiments and specific implementation methods.

[0029] This embodiment provides a method for molding a mobile phone back cover, which includes the following steps:

[0030] Surface treatment of thermoplastic fiberglass board;

[0031] After surface treatment, the thermoplastic fiberglass board is sequentially screen-printed with patterns, optically coated, and then transferred with transparent light-curing adhesive to obtain the prototype of the mobile phone back cover.

[0032] A vegan leather is applied to the prototype of the phone back cover and then photocured. After applying a protective film and a cutting film, the phone back cover substrate is obtained.

[0033] The mobile phone back cover substrate is cut into a preset shape, and then the mobile phone back cover substrate cut into the preset shape is hot-bent to obtain the mobile phone back cover.

[0034] Using thermoplastic fiberglass board as the base material, it has good thermoplasticity and toughness. It can be uniformly cut and hot-bent after the veneer is applied, without having to form the phone back cover blank separately and then apply the veneer. This reduces the waste of production materials and improves production efficiency and yield. Since the veneer is applied before cutting and hot-bending, it is not necessary to require the veneer to have too high a surface tension. Therefore, the thickness of the veneer is reduced, making the phone back cover thinner and lighter, thus improving the user experience.

[0035] Specifically, the mobile phone back cover is formed by hot bending, which can achieve a production efficiency of over 95% and a yield rate of over 95%.

[0036] Furthermore, the glass fiberboard is impregnated to obtain thermoplastic glass fiberboard.

[0037] Furthermore, impregnation of fiberglass boards can alter the degree of cross-linking, giving the fiberglass boards thermoplastic properties.

[0038] Furthermore, the impregnation solution is a modified thermoplastic epoxy resin.

[0039] Specifically, the concentration of the impregnation solution is adjustable and can be formulated according to production requirements.

[0040] Furthermore, the thermoplastic fiberglass board undergoes surface treatment such as grinding or ultrasonic cleaning to ensure that the dyne value of the thermoplastic fiberglass board surface is not less than 38. Grinding or ultrasonic cleaning of the thermoplastic fiberglass board can increase surface adhesion.

[0041] Furthermore, the process of screen printing patterns, optical coating, and transferring transparent light-curing adhesive onto the surface-treated thermoplastic fiberglass board to obtain a prototype of the mobile phone back cover includes the following steps:

[0042] A pre-set pattern is screen-printed onto a thermoplastic fiberglass board using thermoplastic UV ink to form a screen-printed layer;

[0043] An optical coating is applied to the screen printing layer to form a coating layer.

[0044] Transparent UV-curable adhesive is transferred onto the coating layer to obtain the prototype of the phone back cover.

[0045] Compared to traditional methods for forming mobile phone back covers, the method provided in this embodiment involves sequentially screen printing patterns, optical coating, and transferring transparent light-curing adhesive onto a surface-treated thermoplastic fiberglass board, followed by cutting and hot bending. This eliminates the need to make the screen printing stencil and transfer mold conformal to a flat surface, simplifying the printing process and reducing the molding costs associated with spraying.

[0046] Specifically, during the screen printing process, the screen density is 90-120 mesh, the UV equivalent is 1000mj-1500mj, and the irradiation time is 5s-10s.

[0047] Furthermore, thermoplastic UV inks are obtained by modifying epoxy resins with epoxy polyacrylate or polyurethane. Thermoplastic UV inks have good thermoplasticity, allowing for color matching and texture overlay, facilitating subsequent hot bending molding, and do not affect the screen-printed pattern.

[0048] Specifically, during the optical coating process, the electron gun power is 150KW, the time is 40min-70min, the temperature is 50℃-90℃, and the coating thickness is 20nm-500nm.

[0049] Specifically, the thickness of the transparent light-curing adhesive transferred onto the coating layer is 0.05 mm.

[0050] Furthermore, the photocuring energy of the prototype mobile phone back cover with vegan leather is 1000mj-1500mj, and the time is 5-10 seconds.

[0051] Furthermore, a 1000g force protective film is applied to the surface of the vegan skin, and then a 15A / 80g force cutting film is applied to the surface of the protective film.

[0052] Specifically, the thickness of the protective film is 0.05 mm.

[0053] Specifically, the protective film is a PET (polyethylene glycol terephthalate) high-temperature protective film.

[0054] Specifically, the cutting membrane is a PE (polyethylene) membrane.

[0055] Furthermore, the cutting of the mobile phone back cover substrate into a preset shape is achieved using a CNC machine tool.

[0056] Specifically, the CNC machine tool has a rotational speed of 10,000 r / min-24,000 r / min and a feed rate of 2,000 mm / min-4,000 mm / min.

[0057] Furthermore, the mobile phone back cover is obtained by hot bending the mobile phone back cover substrate cut into a preset shape. This is achieved by using a hot bending machine.

[0058] Specifically, during the hot bending process, the preheating time is 5s-10s, the hot bending temperature is 140℃-180℃, and the hot bending time is 5s-10s.

[0059] A pre-set pattern is screen-printed onto a thermoplastic fiberglass board using thermoplastic UV ink to form a screen-printed layer.

[0060] Thermoplastic UV inks are obtained by modifying epoxy resins with epoxy polyacrylate or polyurethane.

[0061] Specifically, the coating layer is also a thermoplastic optical coating layer.

[0062] In this embodiment, a mobile phone back cover is also provided, which is formed according to the above-described mobile phone back cover forming method.

[0063] Furthermore, the thickness of the vegan leather is 0.2 mm. Because the molding method for the phone back cover provided in this embodiment does not require a very high surface tension for the vegan leather, its thickness is reduced compared to the traditional vegan leather thickness of 0.5 mm - 0.6 mm, resulting in a thinner and lighter phone back cover and improved user experience.

[0064] Furthermore, the thickness of the phone's back cover is 0.25mm-0.35mm. Compared to the existing phone back cover thickness of 1mm-1.2mm, the thinner back cover provides a better user experience.

[0065] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention, the scope of which is determined by the scope of the appended claims.

Claims

1. A method for molding a mobile phone back cover, characterized in that, Includes the following steps: The thermoplastic fiberglass board is surface treated to ensure that its surface dyne value is not less than 38. After surface treatment, the thermoplastic fiberglass board is sequentially screen-printed with patterns, optically coated, and then transferred with transparent light-curing adhesive to obtain the prototype of the mobile phone back cover. A vegan leather is applied to the prototype of the phone back cover and then photocured. The photocuring energy is 1000mJ-1500mJ and the time is 5-10 seconds. After a protective film and a cutting film are attached to the surface of the cured vegan leather, a mobile phone back cover substrate is obtained. The mobile phone back cover substrate is cut into a preset shape, and then the mobile phone back cover substrate cut into the preset shape is hot-bent to obtain the mobile phone back cover.

2. The method for forming a mobile phone back cover according to claim 1, characterized in that, Thermoplastic fiberglass board is obtained by impregnation of fiberglass board.

3. The method for forming a mobile phone back cover according to claim 2, characterized in that, The impregnation solution is a modified thermoplastic epoxy resin.

4. The method for forming a mobile phone back cover according to claim 1, characterized in that, A pre-set pattern is screen-printed onto a thermoplastic fiberglass board using thermoplastic UV ink to form a screen-printed layer.

5. The method for forming a mobile phone back cover according to claim 4, characterized in that, Thermoplastic UV inks are obtained by modifying epoxy resins with epoxy polyacrylate or polyurethane.

6. A mobile phone back cover, characterized in that, The mobile phone back cover is formed by the molding method of the mobile phone back cover according to any one of claims 1-5.

7. The method for forming a mobile phone back cover according to claim 6, characterized in that, The thickness of the vegan skin is 0.2mm.

8. The method for forming a mobile phone back cover according to claim 6, characterized in that, The thickness of the phone's back cover is 0.6mm.