Mobile phone shell manufacturing process using PET release film

Abstract

The invention relates to the technical field of composite molding, in particular to a mobile phone shell manufacturing process utilizing PET release liners.The mobile phone shell manufacturing process comprises the following steps that a first PET release liner is taken, and color transfer printing is conducted on the upper surface of the first PET release liner to form a first transfer printing layer; taking at least three layers of transparent glass fiber plates to form a glass fiber layer; taking a second PET release film, and rubbing at least one layer of texture on the lower surface of the second PET release film to form a second transfer layer; the first PET release film with the upper surface facing upwards, the glass fiber layer and the second PET release film with the lower surface facing downwards are placed below a mold pressing jig of a hot press in this way to be subjected to hot pressing and integrated forming, and a semi-finished product is obtained. According to the process provided by the invention, the mobile phone shell can be integrally and directly manufactured, the yield of products manufactured by the process is effectively improved, the manufacturing cost of the process is reduced, and the manufacturing efficiency is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of composite molding, and particularly relates to a manufacturing process of a mobile phone case using a PET release film. Background Art

[0002] Glass fiber is an excellent inorganic non-metallic material with a wide variety of types. Its advantages are good insulation, high heat resistance, good corrosion resistance, and high mechanical strength. Glass fiber is usually used as a reinforcing material in composite materials.

[0003] However, nowadays when manufacturing a mobile phone case, it is necessary to first hot-press the main body of the mobile phone case, and then perform spraying, transfer printing, or other methods on the main body of the mobile phone case to make the texture and color. In this process, one side of the main body of the mobile phone case needs to be processed first and then the other side. Moreover, this solution involves more processes, so there are more transfer and focusing operations for the main body of the mobile phone case. Therefore, under these two unfavorable factors, the defective rate is relatively high, resulting in too high manufacturing costs of the product.

[0004] In addition, since there are more transfer and focusing operations for the main body of the mobile phone case, it needs to be moved multiple times, and there is no way to manufacture it mechanized on a large scale. Under these two unfavorable factors, the manufacturing efficiency is further reduced, unable to meet the demand. Summary of the Invention

[0005] In order to solve the technical problems existing in the manufacturing process of the existing mobile phone case, the present invention provides a manufacturing process of a mobile phone case using a PET release film.

[0006] In order to achieve the above object, the present invention provides the following technical solutions: A manufacturing process of a mobile phone case using a PET release film, including the following steps:

[0007] Step S1: Take the first PET release film 1, and perform color transfer on the upper surface of the first PET release film 1 to form a first transfer layer 11;

[0008] Step S2: Take at least three transparent glass fiber plates 21 to form a glass fiber layer 2;

[0009] Step S3: Take the second PET release film 3, and print at least one layer of texture on the lower surface of the second PET release film 3 to form a second transfer layer 31;

[0010] Step S4: Place the first PET release film 1 with the upper surface facing up, the glass fiber layer 2, and the second PET release film 3 with the lower surface facing down into the lower part of the hot press molding fixture in sequence for hot press integral molding to obtain a semi-finished product;

[0011] Step S5: Remove the first PET release film 1 and the second PET release film 3 to form a finished mobile phone case, which includes a glass fiber layer 2 pressed together, the first transfer layer 11 transferred under the glass fiber layer 2, and the second transfer layer 31 transferred on the glass fiber layer 2.

[0012] Preferably, step S1 specifically includes the following steps: Take the first PET release film 1, reverse hot stamp a gold wire on the upper surface of the first PET release film 1, and reverse spray a color on the hot stamped gold wire to form the first transfer layer 11.

[0013] Preferably, step S3 specifically includes the following steps: Take the second PET release film 3, and optically coat two layers of texture on the lower surface of the second PET release film 3 to form the second transfer layer 31.

[0014] Preferably, it includes a conveying mechanism, and the first PET release film 1 and the second PET release film 3 are coils;

[0015] Step S5 specifically includes the following steps:

[0016] Step S51: Remove the first PET release film 1 and the second PET release film 3 during the conveyance of the semi-finished product by the conveying mechanism;

[0017] Step S52: Cut and process the outer shape of the semi-finished product through CNC to obtain a finished product, which includes a glass fiber layer 2 pressed together, the first transfer layer 11 transferred under the glass fiber layer 2, and the second transfer layer 31 transferred on the glass fiber layer 2.

[0018] Preferably, the thickness of each transparent glass fiber board is 0.1 mm.

[0019] Preferably, in step S4, the working temperature of the hot press is 130 - 150 °C, the pressure is 5 - 80 t, and the hot pressing time is 5 - 8 min.

[0020] Preferably, the texture of the release texture film is a litchi texture, a snake skin texture, or a woven texture.

[0021] By implementing the above technical solutions, the following technical effects are achieved: A mobile phone case manufacturing process using a PET release film provided by the present invention enables the integrated and direct production of mobile phone cases, effectively improving the yield of products made by the process, reducing the cost of process production, and improving the manufacturing efficiency. Brief Description of the Drawings

[0022] Figure 1 It is a process flow diagram of a mobile phone case manufacturing process using a PET release film provided by the present invention;

[0023] Figure 2 Schematic flow chart of a mobile phone case manufacturing process using a PET release film provided by the present invention;

[0024] Figure 3 Schematic flow chart of a mobile phone case manufacturing process using a PET release film provided by the present invention;

[0025] Figure 4 Enlarged cross-sectional structure diagram of a mobile phone case provided by the present invention. Specific embodiments

[0026] To better understand the technical solution of the present invention, the embodiments provided by the present invention will be described in detail below with reference to the accompanying drawings.

[0027] Refer to Figures 1-4 , the first embodiment of the present invention provides a mobile phone case manufacturing process using a PET release film, including the following steps:

[0028] Step S1: Take the first PET release film 1, and perform color transfer on the upper surface of the first PET release film 1 to form a first transfer layer 11;

[0029] Step S2: Take at least three layers of transparent fiberglass plates 21 to form a fiberglass layer 2;

[0030] Step S3: Take the second PET release film 3, and print at least one layer of texture on the lower surface of the second PET release film 3 to form a second transfer layer 31;

[0031] Step S4: Place the first PET release film 1 with the upper surface facing up, the fiberglass layer 2, and the second PET release film 3 with the lower surface facing down into the lower part of the hot press molding fixture in sequence for hot pressing and integral molding to obtain a semi-finished product;

[0032] Step S5: Remove the first PET release film 1 and the second PET release film 3 to form a finished mobile phone case. The finished product includes a fiberglass layer 2 that is integrally pressed, the first transfer layer 11 transferred under the fiberglass layer 2, and the second transfer layer 31 transferred on the fiberglass layer 2.

[0033] In this embodiment, by setting the processed first PET release film 1 and the second PET release film 3 on the upper and lower surfaces of the glass fiber layer 2, and then integrally thermocompression molding the two and the glass fiber layer 2, the manufacturing process can be shortened, and the pre-treatment of the first PET release film 1 and the second PET release film 3 can be separated, thereby shortening the manufacturing time. There is no need to flip the main body of the mobile phone case. Moreover, the integral molding can shorten the key step of molding to less time, thus greatly improving the preparation success rate and reducing the risk of mistakes. In addition, the pre-treatment of the first PET release film 1 and the second PET release film 3 enables the final thermocompression process to be completed quickly, so that the roll-shaped first PET release film 1 and the second PET release film 3 can be used, enabling the roll-to-roll manufacturing of mobile phone cases, making the cutting more precise and the waste material less, thus reducing the manufacturing cost. The roll-to-roll manufacturing enables the continuous manufacturing of mobile phone cases in the conveying mechanism, further improving the manufacturing efficiency. The coloring and other processes during the molding process are completed integrally, minimizing the movement and debugging during the core molding process, greatly improving the preparation accuracy, thus significantly reducing the defective rate and further reducing the cost.

[0034] Based on the above first embodiments, in other embodiments, further, the step S1 specifically includes the following steps: Take the first PET release film 1, reverse hot stamping gold wires on the upper surface of the first PET release film 1, and reverse spraying colors on the hot stamped gold wires to form a first transfer layer 11. The colors are directly transferred onto the main body of the mobile phone case, that is, the glass fiber layer 2, making the transfer effect better and the retention time longer. The reverse hot stamped gold wires will finally be formed on the outermost layer of the mobile phone case, highlighting the gold wires with set patterns on the basis of the color background, and forming a complete and prominent established visual effect on the premise of ensuring that the gold wires are not affected by the colors, improving the visual viewing effect and its stability.

[0035] Based on the above first embodiments, in other embodiments, further, the step S3 specifically includes the following steps: Take the second PET release film 3, and optically coat two layers of textures on the lower surface of the second PET release film 3 to form a second transfer layer 31; the two layers of textures are arranged in the warp and weft directions or at other angles as required, forming a three-dimensional effect and making the texture visual effect more significant; the existence of the transfer characteristics of the second PET release film 3 enables two layers of textures to be directly coated on the second PET release film 3 in advance, greatly shortening the time for coating the textures; in addition, other materials can be prepared in multiple threads simultaneously, greatly shortening the manufacturing time.

[0036] Based on the above first embodiments, in other embodiments, further, a conveying mechanism is included, and the first PET release film 1 and the second PET release film 3 are in rolls;

[0037] The step S5 specifically includes the following steps:

[0038] Step S51: removing the first PET release film 1 and the second PET release film 3 from the semi-finished product during the conveying of the conveying mechanism;

[0039] Step S52: CNC cutting and processing the semi-finished product to obtain a finished product, the finished product includes a laminated glass fiber layer 2, the first transfer layer 11 transferred below the glass fiber layer 2, and the second transfer layer 31 transferred above the glass fiber layer 2.

[0040] In this embodiment, the manufacturing process of one-piece molding of the double-sided PET release film allows the roll-to-roll manufacturing of mobile phone cases, which makes the cutting tighter and reduces the scraps, thereby reducing the manufacturing cost; the roll-to-roll manufacturing allows the mobile phone cases to be continuously manufactured in the conveying mechanism, thereby improving the manufacturing efficiency; the cutting process can be automatically controlled by CNC, which significantly improves the production efficiency, reduces the phenomenon of miscutting, improves the precision and quality of the product, processes the burrs and corners of the product, and solves the problem of fuzz on the product appearance.

[0041] On the basis of the above-mentioned first embodiments, in other embodiments, further, the thickness of each layer of the transparent glass fiber board is 0.1 mm, so that the three layers of transparent glass fiber boards can make the mobile phone case light and thin while providing basic supporting strength for the mobile phone case.

[0042] On the basis of the above-mentioned first embodiments, in other embodiments, further, in the step S4, the working temperature of the hot press is 130-150°C, the pressure is 5-80t, the hot pressing molding time is 5-8min, and then cooling and shaping are carried out to obtain a semi-finished product after cooling.

[0043] Preferably, the texture of the release texture film is lychee texture, snake skin texture or woven texture. In this embodiment, the texture of the release texture film is lychee texture, which not only ensures the beauty of the product, but also effectively improves the feel of the product.

[0044] The above is a detailed introduction to a mobile phone case manufacturing process using a PET release film provided in an embodiment of the present invention. For a person skilled in the art, according to the idea of the embodiment of the present invention, there may be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present invention.

Claims

1. A manufacturing process for mobile phone cases using PET release film, characterized in that, It includes the following steps: Step S1: Take the first PET release film (1), and perform color transfer on the upper surface of the first PET release film (1) to form a first transfer layer (11); Step S2: Take at least three layers of transparent glass fiber plates (21) to form a glass fiber layer (2); Step S3: Take the second PET release film (3), and print at least one layer of texture on the lower surface of the second PET release film (3) to form a second transfer layer (31); Step S4: Place the first PET release film (1) with the upper surface facing up, the glass fiber layer (2), and the second PET release film (3) with the lower surface facing down in sequence below the hot press die pressing fixture for hot press integral molding to obtain a semi-finished product; Step S5: Remove the first PET release film (1) and the second PET release film (3) to form a finished mobile phone case. The finished product includes the glass fiber layer (2) pressed integrally, the first transfer layer (11) transferred under the glass fiber layer (2), and the second transfer layer (31) transferred above the glass fiber layer (2).

2. The manufacturing process of the mobile phone case using the PET release film according to claim 1, characterized in that, The specific steps of Step S1 include the following steps: Take the first PET release film (1), reverse hot stamp gold wires on the upper surface of the first PET release film (1), and reverse spray colors on the hot stamped gold wires to form a first transfer layer (11).

3. The manufacturing process of the mobile phone case using the PET release film according to claim 1, wherein, The specific steps of Step S3 include the following steps: Take the second PET release film (3), and optically coat two layers of texture on the lower surface of the second PET release film (3) to form a second transfer layer (31).

4. The manufacturing process of the mobile phone case using the PET release film according to any one of claims 1-3, characterized in that, It includes a conveying mechanism, and the first PET release film (1) and the second PET release film (3) are coils; The specific steps of Step S5 include the following steps: Step S51: Remove the first PET release film (1) and the second PET release film (3) during the conveyance of the semi-finished product by the conveying mechanism; Step S52: Cut and process the shape of the semi-finished product by CNC to obtain a finished product. The finished product includes the glass fiber layer (2) pressed integrally, the first transfer layer (11) transferred under the glass fiber layer (2), and the second transfer layer (31) transferred above the glass fiber layer (2).

5. The manufacturing process of a mobile phone case using a PET release film according to claim 1, characterized in that, The thickness of each layer of the transparent glass fiber plate is 0.1 mm.

6. The manufacturing process of the mobile phone case using the PET release film according to claim 1, wherein, In Step S4, the working temperature of the hot press is 130 - 150 °C, the pressure is 5 - 80 t, and the hot press molding time is 5 - 8 min.

7. The manufacturing process of the mobile phone case using the PET release film according to claim 1, characterized in that, The texture of the release texture is litchi pattern, snake skin pattern or woven texture.

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