A manufacturing process for seamless grafting of multiple textures on a mobile phone back cover

Abstract

A manufacturing process for seamless grafting of multiple textures on a mobile phone back cover is made through the following steps: Step 1, prepare raw materials; Step 2, transfer printing; Step 3, first texture transfer printing; Step 4, second texture transfer printing; Step 5, perform a release surface treatment on the side with the texture area of the double-texture carrier board in Step 4 to obtain a replication master for double-texture effect replication. The manufacturing process for seamless grafting of multiple textures on a mobile phone back cover of the present invention realizes the grafting of two different textures through the method of exposure and development. The appearance effect is the same as that of photolithography, the transition area is very flat, the splicing of the entire texture is not affected by the position and shape, and it is flexibly applied, ensuring the surface flatness of the mobile phone back cover in the later stage. Multiple textures can be seamlessly grafted together. The entire grafting cost is low and the cycle is short, which greatly facilitates the selection of models for early development.

Description

Technical Field

[0001] The present invention relates to the field of mobile phone back cover production, and particularly to a manufacturing process for seamless grafting of multiple textures on a mobile phone back cover. Background Art

[0002] At present, multi-texture transfer is widely used for the surface decoration of mobile phone back covers. The more diverse the textures of the appearance parts are, the more attractive they are to consumers. For example, in the production of traditional mobile phone back covers, a camera hole is first opened at the position of the camera hole on the back cover, and then texture treatment is performed on one side of the back cover. In this way, the texture of the entire back cover is the same. In order to make the back cover have multiple textures, a decorative part with a size much larger than the size of the camera is added at the position of the camera on the back cover. The decorative part has a single texture, and then the decorative part is assembled with the back cover. However, this assembly method will produce gaps and form steps, making the surface of the entire back cover uneven. At the same time, if it is required that the decorative part and the back cover have a multi-texture effect and present a dazzling and colorful visual effect, generally, direct lithography multi-texture forming is used, and multiple different texture combinations need to be made and compared to find the best combination effect. In this way, the design cycle of the multi-texture of the entire mobile phone back cover is relatively long, and the lithography effect of making different textures each time needs to reach about 200,000. In this way, the production cost of making a multi-texture template for the mobile phone back cover with a good final effect is extremely high.

[0003] In view of this, the inventor of this case conducted in-depth research on the above problems, and thus this case was born. Summary of the Invention

[0004] The purpose of the present invention is to provide a manufacturing process for seamless grafting of multiple textures on a mobile phone back cover, which has low production cost, fast timeliness, and realizes seamless grafting to make the surface of the mobile phone back cover flat.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solution:

[0006] A manufacturing process for seamless grafting of multiple textures on a mobile phone back cover is made through the following steps.

[0007] Step 1: Prepare raw materials. Prepare the first single-cavity textured plate, the second single-cavity textured plate, the first film, the second film, and an acrylic carrier plate. Both the first single-cavity textured plate and the second single-cavity textured plate are PC plates. The first single-cavity textured plate has a first textured area that matches the outer contour of the mobile phone. The second single-cavity textured plate has a second textured area that matches the outer contour of the mobile phone. Both the first textured area and the second textured area are covered with textures, and the texture of the first textured area is different from that of the second textured area. The first film has a first light-shielding area that matches the outer contour of the mobile phone, and a first light-transmitting area with a size larger than the size of the camera lens is provided at the camera area of the mobile phone. The second film has a second light-transmitting area that matches the first light-shielding area, and a second light-shielding area that matches the first light-transmitting area.

[0008] Step 2: Transfer printing. Transfer the texture of the first textured area on the first single-cavity textured plate to a thin sheet to form a first textured thin sheet. One side of the first textured thin sheet has a first textured area that matches the outer contour of the mobile phone back cover. Transfer the texture of the second textured area on the second single-cavity textured plate to another thin sheet to form a second textured thin sheet with a second textured area that matches the outer contour of the mobile phone back cover on one side.

[0009] Step 3: First texture transfer. Bond the second textured thin sheet from Step 2 with the acrylic carrier plate from Step 1, and transfer the texture on the second textured thin sheet to the acrylic carrier plate. After transfer, place the second film from Step 1 on the second textured thin sheet so that the second light-transmitting area of the second film coincides with the second textured area of the second textured thin sheet. After placement, transfer it to exposure and development processing. After exposure and development processing, remove the second film and the second textured thin sheet, and wipe the wet glue on the acrylic carrier plate at the second light-shielding area of the second film to make the area of the acrylic carrier plate at the second light-shielding area of the second film a textureless area, obtaining an acrylic textured carrier plate. One side of the acrylic textured carrier plate has a second textured area that matches the outer contour of the mobile phone back cover, and there is a textureless area within the second textured area.

[0010] Step 4. Second texture transfer: Stick the first texture thin sheet from Step 2 to the acrylic texture carrier board from Step 3, and transfer the texture on the first texture thin sheet onto the second texture area of the acrylic texture carrier board for lamination. After the transfer, place the first film from Step 1 on the first texture thin sheet, aligning the first light-shielding area of the first film with the second texture area of the acrylic texture carrier board and the first light-transmitting area with the non-textured area of the acrylic texture carrier board. After placement, transfer it to exposure and development processing. After the exposure and development processing, remove the first film and the first texture thin sheet, and perform wet glue erasure on the acrylic texture carrier board in the first light-shielding area of the first film, making the area of the acrylic texture carrier board in the first light-shielding area of the first film a non-textured area, thus obtaining a double-texture carrier board. One side of the double-texture carrier board has a texture area, which is the second texture area that matches the outer contour of the mobile phone and the first texture area that matches the camera area of the mobile phone.

[0011] Step 5. Perform a release surface treatment on the side with the texture area of the double-texture carrier board from Step 4 to obtain a replication master for double-texture effect replication.

[0012] The above-mentioned first single-cavity texture plate, second single-cavity texture plate, first film, second film, and acrylic carrier board are all rectangular plates. The length direction of the above-mentioned rectangular plate is the front-back direction, and the width direction is the left-right direction. Two fixing target pins are provided at the left side of the above-mentioned acrylic carrier board at intervals in the front-back direction. Two target positioning holes corresponding to the two fixing target pins of the acrylic carrier board are provided at the left side of the above-mentioned first film and second film.

[0013] In the above-mentioned Step 2, first prepare two blank PC boards in a rectangular structure. The thickness of the blank PC board is 0.122 - 0.126 mm, and the size of the blank PC board is smaller than that of the acrylic board. The two blank PC boards are divided into the first PC board and the second PC board. Coat the entire surface of one side of the first PC board with UV transfer glue to form a glue layer. Then, stick the first single-cavity texture plate to the first PC board, and make the first texture area of the first single-cavity texture plate fit the glue layer. Then, press down the first single-cavity texture plate to transfer all the texture of the first texture area of the first single-cavity texture plate onto the first PC board, thus obtaining the above-mentioned first texture thin sheet. Similarly, coat the entire surface of one side of the second PC board with UV transfer glue to form a glue layer. Then, stick the second single-cavity texture plate to the second PC board, and make the second texture area of the second single-cavity texture plate fit the glue layer of the second PC board. Then, press down the second single-cavity texture plate to transfer all the texture of the second texture area of the second single-cavity texture plate onto the second PC board, thus obtaining the above-mentioned second texture thin sheet.

[0014] In Step 3, local dispensing is performed on one side of the acrylic carrier board to obtain a first dispensing area. The first dispensing area is adhesively attached to the second texture area of the second texture thin sheet. Then, the second texture thin sheet is rolled to transfer all the textures of the second texture area onto the first dispensing area of the acrylic carrier board. When placing the second film, the fixed target pin is relatively positioned to pass through the target positioning hole of the second film.

[0015] In Step 4, dispensing treatment is performed on the texture acrylic carrier board at the position of the second texture area in Step 3 to obtain a second dispensing area. The second dispensing area is adhesively attached to the first texture area of the first texture thin sheet. Then, the first texture thin sheet is rolled to transfer all the textures of the first texture area onto the second dispensing area of the texture acrylic carrier board. When placing the first film, the fixed target pin is relatively positioned to pass through the target positioning hole of the first film.

[0016] In Step 5, a full-surface electroplated anti-fingerprint liquid layer is applied to the side of the double-texture carrier board with the texture area. This anti-fingerprint liquid layer is the said release surface treatment.

[0017] In Step 3, when erasing the wet glue on the acrylic carrier board, it is wiped with a dust-free cloth dipped in ethyl acetate or alcohol. In Step 4, when erasing the wet glue on the acrylic texture carrier board, it is wiped with a dust-free cloth dipped in ethyl acetate or alcohol.

[0018] After adopting the above technical solution, a manufacturing process for seamless grafting of multiple textures on a mobile phone back cover according to the present invention realizes the grafting of two different textures through exposure and development. The appearance effect is the same as that of photolithography, the transition area is very flat, the splicing of the entire texture is not affected by the position and shape, and it is flexibly applied, ensuring the surface flatness of the mobile phone back cover in the later stage. Multiple textures can be seamlessly grafted together. The entire grafting cost is low and the cycle is short, which greatly facilitates the selection of the early-stage development. Description of the Drawings

[0019] Figure 1 It is a schematic diagram of the first film;

[0020] Figure 2 It is a schematic diagram of the second film;

[0021] Figure 3 It is a manufacturing flow chart of Step 3;

[0022] Figure 4 It is a manufacturing flow chart of Step 4. Detailed Embodiments

[0023] In order to further explain the technical solution of the present invention, it will be elaborated in detail through specific embodiments below.

[0024] A manufacturing process for seamless grafting of multiple textures on a mobile phone back cover according to the present invention is made through the following steps

[0025] Step 1: Prepare raw materials. Prepare the first single-cavity texture plate, the second single-cavity texture plate, the first film 100, the second film 200, and the acrylic carrier plate 300. The first single-cavity texture plate, the second single-cavity texture plate, the first film, the second film, and the acrylic carrier plate are all rectangular plates. The first single-cavity texture plate and the second single-cavity texture plate are both PC plates. The first single-cavity texture plate has a first texture area that matches the outer contour of the mobile phone. The second single-cavity texture plate has a second texture area that matches the outer contour of the mobile phone. The first single-cavity texture plate and the second single-cavity texture plate are templates provided by the customer. Both the first texture area and the second texture area are covered with textures, and the textures in the first texture area are different from those in the second texture area. For example, Figure 1 、 2 as shown, the first film 100 has a first light-shielding area 101 that matches the outer contour of the mobile phone, and a first light-transmitting area 102 with a size larger than the size of the camera lens is provided at the camera area of the mobile phone in the first light-shielding area 101. That is, the first film 100 is a light-transmitting plate. A black light-shielding area that matches the outer contour of the mobile phone is formed in the central area of this light-transmitting plate, which is the so-called first light-shielding area. A light-transmitting area, that is, a non-black area, is provided at the position of the mobile phone camera in the black light-shielding area, and the size of this light-transmitting area is larger than the size of the mobile phone camera; the second film 200 has a second light-transmitting area 201 that matches the first light-shielding area 101, and the second light-transmitting area 201 has a second light-shielding area 202 that matches the first light-transmitting area. That is, the second film 200 is also a square light-transmitting plate. A black contour line that matches the contour of the first light-shielding area is provided in the central area of the square light-transmitting plate. The black outer contour of this first light-shielding area is inside and in close cooperation with this black contour line. A black light-shielding area is provided in the black contour line corresponding to the first light-transmitting area, and this black light-shielding area is the so-called second light-shielding area. The first light-shielding area coincides with the first light-transmitting area.

[0026] Step 2: Transfer. Transfer the texture of the first texture area on the first single-cavity texture plate to a thin sheet to form a first texture thin sheet 400. One side of the first texture thin sheet 400 has a first texture area that matches the outer contour of the mobile phone back cover. Transfer the texture of the second texture area on the second single-cavity texture plate to another thin sheet to form a second texture thin sheet 500. One side of the second texture thin sheet 500 has a second texture area that matches the outer contour of the mobile phone back cover;

[0027] The specific transfer method is as follows: First, prepare two blank PC boards in a rectangular structure. The thickness of the blank PC board is 0.122 - 0.126 mm, and the size of the blank PC board is smaller than that of the acrylic board. The two blank PC boards are divided into the first PC board and the second PC board. Apply UV transfer glue all over one side of the first PC board to form a glue layer. Then, attach the first single-cavity texture board to the first PC board, and the first texture area of the first single-cavity texture board is attached to the glue layer. The texture on the first single-cavity texture board contacts the glue on the first PC board. Then, press down the first single-cavity texture board to transfer all the texture in the first texture area of the first single-cavity texture board to the first PC board, obtaining the above-mentioned first texture thin sheet. Similarly, apply UV transfer glue all over one side of the second PC board to form a glue layer. Then, attach the second single-cavity texture board to the second PC board, and the second texture area of the second single-cavity texture board is attached to the glue layer of the second PC board, that is, the texture on the second single-cavity texture board contacts the glue on the second PC board. Then, press down the second single-cavity texture board to transfer all the texture in the second texture area of the second single-cavity texture board to the second PC board, obtaining the above-mentioned second texture thin sheet.

[0028] Step 3: First texture transfer. As Figure 3 shown, attach the second texture thin sheet 500 in Step 2 to the acrylic carrier board 300 in Step 1, and transfer the texture on the second texture thin sheet 500 to the acrylic carrier board 300. After the transfer, place the second film 200 in Step 1 on the second texture thin sheet 500, and align the second light-transmitting area of the second film with the second texture area of the second texture thin sheet. After placement, transfer it to the exposure and development process. After the exposure and development process, remove the second film and the second texture thin sheet, and perform wet glue erasure on the second light-shielding area of the acrylic carrier board where the second film is located, so that the area of the acrylic carrier board corresponding to the second light-shielding area of the second film is a textureless area, obtaining the acrylic texture carrier board 600. One side of the acrylic texture carrier board 600 has a second texture area 601 that coincides with the outer contour of the mobile phone back cover, and there is a textureless area 602 in the second texture area.

[0029] Specifically, local dispensing is performed on the upper surface of the acrylic carrier plate 300 to obtain a first dispensing area. The second texture thin sheet 500 is placed on the upper surface of the acrylic carrier plate 300, and the second texture area of the second texture thin sheet 500 is fitted to the first dispensing area, that is, the side of the second texture thin sheet 500 with the second texture faces downward. Then, the second texture thin sheet is rolled to transfer all the textures in the second texture area to the first dispensing area of the acrylic carrier plate. After that, the second film 200 is placed. When placing the second film 200, the texture range on the acrylic carrier plate 300 all falls within the black contour line range of the second film 200, that is, the texture range of the acrylic carrier plate 300 all falls within the second light-transmitting area 201 of the second film 200. In this way, during exposure and development, the textures in the second texture area at the second light-transmitting area 201 are all cured, while the textures in the second texture area at the second shielding area 202 are still in a wet glue state; this exposure and development processing method is an existing method and will not be repeated here;

[0030] When erasing the wet glue, a lint-free cloth is used to dip ethyl acetate or alcohol and gently erase the acrylic carrier plate corresponding to the second light-shielding area of the second film, so that the texture here can be erased, and no texture is formed on the acrylic carrier plate at this position.

[0031] Step 4: Second texture transfer. The first texture thin sheet 400 in Step 2 is fitted to the acrylic textured carrier plate 600 in Step 3, and the texture on the first texture thin sheet 400 is transferred and overlapped on the second texture area 601 of the acrylic textured carrier plate 600. After transfer, the first film 100 in Step 1 is placed on the first texture thin sheet 400, so that the first light-shielding area of the first film 100 coincides with the second texture area 601 of the acrylic textured carrier plate 600, and the first light-transmitting area 102 coincides with the texture-free area 602 of the acrylic textured carrier plate 600. After placement, it is transferred to exposure and development processing. After exposure and development processing, the first film 100 and the first texture thin sheet 400 are taken away, and the wet glue on the acrylic textured carrier plate 600 corresponding to the first light-shielding area 101 of the first film 100 is erased, so that the part of the acrylic textured carrier plate 600 corresponding to the first light-shielding area 101 of the first film 100 becomes a texture-free area, and a double-texture carrier plate 700 is obtained. One side of the double-texture carrier plate has a texture area, and this texture area is the second texture area that coincides with the outer contour of the mobile phone and the first texture area that matches the camera area of the mobile phone;

[0032] Specifically, local dispensing is performed on the second texture area 601 of the acrylic texture carrier board 600 to obtain a second dispensing area. The first texture thin sheet 400 is placed on the second texture area 601 of the acrylic texture carrier board 600, and the first texture area of the first texture thin sheet 400 is in kiss fit with the second dispensing area, that is, the side of the first texture thin sheet 400 with the first texture faces downward. Then, the first texture thin sheet is rolled to transfer all the textures in the first texture area to the second dispensing area of the acrylic texture carrier board 600, that is, the first texture area is superimposed on the second texture area 601 of the acrylic texture carrier board 600, and the first texture exists at the non-texture area 602. Then, the first film 100 is placed. When placing the first film 100, the second texture area on the acrylic texture carrier board 600 completely falls into coincidence with the first light-shielding area 101 of the first film 100. In this way, after exposure and development, the first texture area at the first light-shielding area 101 is in a wet glue state, and the first texture area at the first light-transmitting area 102 is in a cured state;

[0033] When erasing the wet glue, use a dust-free cloth dipped in ethyl acetate or alcohol to gently erase the area on the acrylic texture carrier board 600 corresponding to the first light-shielding area of the first film, and the first texture in this area can be erased, so that no first texture is formed at this position on the acrylic texture carrier board 600.

[0034] Step Five: Perform a release surface treatment on the side with the texture area of the double-texture carrier board 700 obtained in Step Four. Specifically, perform a full-surface electroplating of an anti-fingerprint liquid layer on the side with the texture area of the double-texture carrier board 700. This anti-fingerprint liquid layer is the above-mentioned release surface treatment to obtain a replication master for double-texture effect replication.

[0035] The manufacturing process of the present invention, the processed double-texture carrier board 700 is a product developed by R & D personnel. Finally, one double-texture carrier board is selected from multiple developed products as a replication master for use. This process is applied in the R & D stage and is not for production use.

[0036] A manufacturing process for seamless grafting of multiple textures on a mobile phone back cover according to the present invention realizes the grafting of two different textures through exposure and development. The appearance effect is the same as that of photolithography, the transition area is very flat, the splicing of the entire texture is not affected by the position and shape, the application is flexible, the surface flatness of the mobile phone back shell in the later stage is ensured, multiple textures can be seamlessly grafted together, the entire grafting cost is low, and the cycle is short, which greatly facilitates the selection in the early-stage development.

[0037] In this new type, the length direction of the acrylic carrier board is the front-back direction, and the width direction is the left-right direction. There are two fixed target pins 301 arranged at intervals in the front-back direction on the left side of the acrylic carrier board 300. The first film 100 is provided with two target positioning holes 103 corresponding to the two fixed target pins of the acrylic carrier board. Correspondingly, there are two target positioning holes 203 on the left side of the second film 200 corresponding to the two fixed target pins of the acrylic carrier board. In this way, in step three, when the second film 200 is placed, the target positioning holes 203 are aligned with the fixed target pins 301, which plays a positioning role for the second film 200. Similarly, in step four, when the first film 100 is placed, the target positioning holes 103 are aligned with the fixed target pins 301, which plays a positioning role for the first film 100.

[0038] The above embodiments do not limit the method of the present invention. Any appropriate changes or modifications made by those of ordinary skill in the art shall be regarded as not departing from the patent scope of the present invention.

Claims

1. A manufacturing process for seamless grafting of multiple textures on a mobile phone back cover, characterized in that: It is made through the following steps: Step 1: Prepare raw materials. Prepare a first single-cavity texture plate, a second single-cavity texture plate, a first film, a second film, and an acrylic carrier plate. Both the first single-cavity texture plate and the second single-cavity texture plate are PC boards. The first single-cavity texture plate has a first texture area that matches the outer contour of the mobile phone. The second single-cavity texture plate has a second texture area that matches the outer contour of the mobile phone. Both the first texture area and the second texture area are covered with textures, and the texture of the first texture area is different from that of the second texture area. The first film has a first light-shielding area that matches the outer contour of the mobile phone, and a first light-transmitting area with a size larger than that of the camera lens is provided at the camera area of the mobile phone. The second film has a second light-transmitting area that matches the first light-shielding area, and a second light-shielding area that matches the first light-transmitting area. Step 2: Transfer printing. Transfer the texture of the first texture area on the first single-cavity texture plate to a thin sheet to form a first texture thin sheet. One side of the first texture thin sheet has a first texture area that matches the outer contour of the mobile phone back cover. Transfer the texture of the second texture area on the second single-cavity texture plate to another thin sheet to form a second texture thin sheet with a second texture area that matches the outer contour of the mobile phone back cover on one side. Step 3: First texture transfer printing. Stick and cooperate the second texture thin sheet in Step 2 with the acrylic carrier plate in Step 1, and transfer the texture on the second texture thin sheet to the acrylic carrier plate. After transfer printing, place the second film in Step 1 on the second texture thin sheet so that the second light-transmitting area of the second film coincides with the second texture area of the second texture thin sheet. After placement, transfer it to exposure and development processing. After exposure and development processing, remove the second film and the second texture thin sheet, and perform wet glue erasure on the acrylic carrier plate in the second light-shielding area of the second film, so that the part of the acrylic carrier plate in the second light-shielding area of the second film is a textureless area, obtaining an acrylic texture carrier plate. One side of the acrylic texture carrier plate has a second texture area that matches the outer contour of the mobile phone back cover, and there is a textureless area in the second texture area. Step 4: Second texture transfer printing. Stick and cooperate the first texture thin sheet in Step 2 with the acrylic texture carrier plate in Step 3, and transfer the texture on the first texture thin sheet to the second texture area of the acrylic texture carrier plate for lamination. After transfer printing, place the first film in Step 1 on the first texture thin sheet so that the first light-shielding area of the first film coincides with the second texture area of the acrylic texture carrier plate, and the first light-transmitting area coincides with the textureless area of the acrylic texture carrier plate. After placement, transfer it to exposure and development processing. After exposure and development processing, remove the first film and the first texture thin sheet, and perform wet glue erasure on the acrylic texture carrier plate in the first light-shielding area of the first film, so that the part of the acrylic texture carrier plate in the first light-shielding area of the first film is a textureless area, obtaining a double-texture carrier plate. One side of the double-texture carrier plate has a texture area, which is a second texture area that matches the outer contour of the mobile phone and a first texture area that matches the mobile phone camera area. Step 5: Perform a release surface treatment on the side of the double-grain carrier board with a texture area in Step 4 to obtain a replication master for double-texture effect replication.

2. The manufacturing process of seamless grafting of multiple textures on the back cover of a mobile phone according to claim 1, characterized in that: The above-mentioned first single-cavity texture board, second single-cavity texture board, first film, second film, and acrylic carrier board are all rectangular plates. The length direction of the above-mentioned rectangular plate is the front-back direction, and the width direction is the left-right direction. There are two fixing target pins arranged at intervals in the front-back direction on the left side of the above-mentioned acrylic carrier board. Corresponding to the two fixing target pins of the acrylic carrier board, there are two target positioning holes on the left side of the first film and the second film.

3. The manufacturing process of seamless grafting of multiple textures on a mobile phone back cover according to claim 1, characterized in that: In the above-mentioned Step 2, first prepare two blank PC boards in a rectangular structure. The thickness of the blank PC board is 0.122 - 0.126 mm, and the size of the blank PC board is smaller than that of the acrylic board. The two blank PC boards are divided into the first PC board and the second PC board. Coat the entire surface of one side of the first PC board with UV transfer glue to form a glue layer. Then, attach the first single-cavity texture board to the first PC board, and the first texture area of the first single-cavity texture board is attached to the glue layer. After that, press down the first single-cavity texture board to transfer all the textures of the first texture area of the first single-cavity texture board onto the first PC board to obtain the above-mentioned first texture thin sheet. Similarly, coat the entire surface of one side of the second PC board with UV transfer glue to form a glue layer. Then, attach the second single-cavity texture board to the second PC board, and the second texture area of the second single-cavity texture board is attached to the glue layer of the second PC board. After that, press down the second single-cavity texture board to transfer all the textures of the second texture area of the second single-cavity texture board onto the second PC board to obtain the above-mentioned second texture thin sheet.

4. The manufacturing process of seamless grafting of multiple textures on a mobile phone back cover according to claim 2, characterized in that: In Step 3, perform local dotting on one side of the acrylic carrier board to obtain a first dotting area. The first dotting area is kiss-fitted with the second texture area of the second texture thin sheet. Then, roll the second texture thin sheet to transfer all the textures of the second texture area onto the first dotting area of the acrylic carrier board. When placing the second film, the fixing target pins are passed through the target positioning holes of the second film in relative position. In Step 4, perform dotting treatment on the textured acrylic carrier board in Step 3 at the position of the second texture area to obtain a second dotting area. The second dotting area is kiss-fitted with the first texture area of the first texture thin sheet. Then, roll the first texture thin sheet to transfer all the textures of the first texture area onto the second dotting area of the textured acrylic carrier board. When placing the first film, the fixing target pins are passed through the target positioning holes of the first film in relative position.

5. The manufacturing process of seamless grafting of multiple textures on a mobile phone back cover according to claim 2, characterized in that: In Step 5, coat the entire surface of the side of the double-grain carrier board with a texture area with an anti-fingerprint liquid layer by electroplating. This anti-fingerprint liquid layer is the above-mentioned release surface treatment.

6. The manufacturing process of seamless grafting of multiple textures on the back cover of a mobile phone according to claim 2, characterized in that: In Step 3, when erasing the wet glue on the acrylic carrier board, use a dust-free cloth dipped in ethyl acetate or alcohol for erasing. In Step 4, when erasing the wet glue on the acrylic textured carrier board, use a dust-free cloth dipped in ethyl acetate or alcohol for erasing.

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