Method for manufacturing protective casing

Abstract

This invention discloses a method for manufacturing a protective shell. A masking element is first injection molded onto the surface of the bonding area or areas that do not require painting. During subsequent painting operations, the masking element is used for painting. The masking element effectively protects the bonding area and areas that do not require painting, preventing paint from adhering to their surfaces. After painting is complete, the masking element is peeled off using physical or chemical methods to expose the bonding area and areas that do not require painting. Because these areas are free of paint, the bonding area can bond normally with other parts without the need for CNC machining, polishing, or grinding. By injection molding the masking element, the bond between the masking element and the bonding area is tight. During painting operations, paint will not seep into the surface of the bonding area. This solves the material waste caused by CNC machining of the bonding area with paint adhering to it, and also ensures that the surface of the bonding area is not contaminated by paint.

Description

Technical Field

[0001] This application relates to the field of 3C product accessories technology, and in particular to a method for manufacturing a protective case. Background Technology

[0002] Protective cases typically consist of a back panel and side frames. Under certain design requirements, it is necessary to apply paint to specific areas of the protective case (such as the back panel or side frames) to achieve certain properties, such as enhanced feel, increased anti-slip properties, and hydrophobicity. However, because of the paint layer, the painted areas cannot be directly injection molded to bond with another material. Therefore, during the processing of the material, the area to be injection molded with another material needs to be larger than the intended shape to allow for CNC machining. After painting, the excess part and the paint on it must be cut off to ensure the normal progress of subsequent injection molding steps. This process can easily lead to waste of raw materials.

[0003] Traditional methods involve using masking techniques such as applying tape, stickers, or jigs to conceal the area to be injection molded with another material. However, these masking methods are prone to peeling off at the edges when in contact with the high-pressure jet of paint, causing paint to spill into non-sprayed areas. Furthermore, the precision of sticker application is uncontrollable, making precise masking impossible. For complex parts with intricate shapes, curved surfaces, or structures, these methods inevitably compromise process requirements or lower quality standards. Moreover, traditional masking methods also have microscopic gaps. During the spraying process, capillary action allows paint to seep into non-sprayed areas. In subsequent injection molding processes, this paint seepage can weaken or prevent bonding, leading to defective or scrapped products. Summary of the Invention

[0004] This application discloses a method for manufacturing a protective shell, comprising:

[0005] The first part of the protective shell is obtained through processing, and the first part includes a main body area and a bonding area;

[0006] A masking element is formed on the surface of the bonding area by injection molding to obtain a part to be sprayed, wherein the masking element completely covers the surface of the bonding area;

[0007] Spray the workpiece to be coated;

[0008] Remove the masking element to expose the bonding area;

[0009] The protective shell is obtained by injection molding the second part of the protective shell onto the bonding area.

[0010] Another embodiment of this application discloses another method for manufacturing a protective shell, including:

[0011] The first part of the protective shell is obtained by processing, and the first part includes a sprayed area, a non-sprayed area and a bonding area;

[0012] A masking element is formed by injection molding on the surface of the bonding area and the surface of the non-sprayed area to obtain a part to be sprayed, wherein the masking element completely covers the surface of the bonding area and the surface of the non-sprayed area;

[0013] Spray the workpiece to be coated;

[0014] Remove the masking element to expose the bonding area and the unpainted area;

[0015] The protective shell is obtained by injection molding the second part of the protective shell onto the bonding area.

[0016] Compared with the prior art, this application has at least the following beneficial effects:

[0017] The protective shell manufacturing method disclosed in this application involves first injection molding a masking part onto the surface of the bonding area or areas that do not require painting. During subsequent painting operations, the masking part is used for painting. The masking part effectively protects the bonding area and areas that do not require painting, preventing paint from adhering to their surfaces. After painting is completed, the masking part is peeled off using physical or chemical methods to expose the bonding area and areas that do not require painting. Since these areas are free of paint, the bonding area can be normally bonded to other parts without the need for CNC machining, polishing, or grinding. By injection molding the masking part, the bond between the masking part and the bonding area is tight, preventing paint from seeping into the surface of the bonding area during painting operations. This solves the material waste caused by CNC machining of the bonding area with paint adhering to it and ensures that the surface of the bonding area is not contaminated by paint. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in this application, the accompanying drawings used in the application will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0019] Figure 1 A method for manufacturing a protective shell provided in this application;

[0020] Figure 2 Another method for manufacturing a protective shell provided in this application;

[0021] Figure 3 A schematic diagram of the structure of a protective shell provided in this application;

[0022] Figure 4 for Figure 3 The diagram shows the exploded structure of the protective shell.

[0023] Figure 5 for Figure 3 The diagram shows the structure of the back plate in the protective shell.

[0024] Figures 6a-6e A schematic flowchart illustrating the manufacturing method of the protective shell provided in this application;

[0025] Figure 7 A schematic diagram of the structure after the back plate of the protective shell is combined with the shielding component;

[0026] Figure 8 for Figure 7 The diagram shown is an exploded view of the structure.

[0027] Figure 9 for Figure 7 A schematic diagram of the shielding component in the structure shown. Detailed Implementation

[0028] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0029] In this application, the terms "upper," "inner," "outer," "middle," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this application and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0030] Furthermore, in addition to indicating location or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0031] Furthermore, the terms "provided with" and "connected" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral structure; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium, or an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of these terms in this application based on the specific circumstances.

[0032] Furthermore, the terms "first," "second," etc., are primarily used to distinguish different devices, components, or parts (which may be the same or different in specific type and construction), and are not intended to indicate or imply the relative importance or quantity of the indicated devices, components, or parts. Unless otherwise stated, "a plurality of" means two or more.

[0033] Protective cases typically consist of a back panel and side frames. Under certain design requirements, it is necessary to apply paint to specific areas of the protective case (such as the back panel or side frames) to achieve certain properties, such as enhanced feel, increased anti-slip properties, and hydrophobicity. However, because of the paint layer, the painted areas cannot be directly injection molded to bond with another material. Therefore, during the processing of the material, the area to be injection molded with another material needs to be larger than the intended shape to allow for CNC machining. After painting, the excess part and the paint on it must be cut off to ensure the normal progress of subsequent injection molding steps. This process can easily lead to waste of raw materials.

[0034] Traditional methods involve using masking techniques such as applying tape, stickers, or jigs to conceal the area to be injection molded with another material. However, these masking methods are prone to peeling off at the edges when in contact with the high-pressure jet of paint, causing paint to spill into non-sprayed areas. Furthermore, the precision of sticker application is uncontrollable, making precise masking impossible. For complex parts with intricate shapes, curved surfaces, or structures, these methods inevitably compromise process requirements or lower quality standards. Moreover, traditional masking methods also have microscopic gaps. During the spraying process, capillary action allows paint to seep into non-sprayed areas. In subsequent injection molding processes, this paint seepage can weaken or prevent bonding, leading to defective or scrapped products.

[0035] To address the aforementioned technical problems, this application provides a method for manufacturing a protective shell. A masking element is first injection molded onto the surface of the bonding area or areas that do not require painting. During subsequent painting operations, the masking element is used for painting. The masking element effectively protects the bonding area and areas that do not require painting, preventing paint from adhering to their surfaces. After painting is complete, the masking element is peeled off using physical or chemical methods to expose the bonding area and areas that do not require painting. Because these areas are free of paint, the bonding area can bond normally with other parts without the need for CNC machining, polishing, or grinding. By injection molding the masking element, the bond between the masking element and the bonding area is tight. During painting operations, paint will not seep into the surface of the bonding area. This solves the material waste caused by CNC machining of the bonding area with paint adhering to it, and also ensures that the surface of the bonding area is not contaminated by paint.

[0036] The technical solution of this application will be further described below with reference to the embodiments and accompanying drawings.

[0037] Please see Figure 1 , Figure 3 and Figure 5 The present application provides a method for manufacturing a protective shell, including,

[0038] Step S10: The first part of the protective shell is obtained through processing. The first part includes the main body area and the bonding area.

[0039] like Figure 3 As shown, a protective case typically consists of two main parts: a back panel 10 and a frame 20. The back panel 10 is usually made of a relatively hard material such as PC, glass, or ceramic to give the protective case high overall strength and maintain its shape stability, preventing deformation. See further details. Figure 5 Taking the back panel 10 as the first part as an example, the back panel 10 includes a main body area 10a and a bonding area 10b, wherein the bonding area 10b is used to bond with the frame.

[0040] Step S20: A masking part is formed on the surface of the bonding area by injection molding to obtain the part to be coated. The masking part completely covers the surface of the bonding area.

[0041] See Figure 6a and Figure 6b , Figure 6a What is shown is Figure 5 The cross-section of the back plate in the middle, Figure 6bThe diagram shows a masking element 11 injection-molded onto the surface of the bonding area 10b, wherein the masking element 11 completely covers the surface of the bonding area 10b. By injection molding the masking element 11 onto the surface of the bonding area 10b, the masking element 11 and the bonding area 10b can fit tightly together. During the spraying process, even if capillary action occurs, paint will not seep into the space between the two. Therefore, the masking element 11 can effectively protect the bonding area 10b from paint contamination, ensuring a stable bond between the bonding area 10b and the frame 20, preventing problems such as detachment or poor bonding. In other embodiments, the masking element 11 can also be attached to the surface of the bonding area 10b using other similar processes, as long as the same effect as injection molding is achieved.

[0042] Step S30: Spray paint on the part to be painted.

[0043] See Figure 6c After protecting the bonding area 10b in the above steps, the back panel 10 can be directly sprayed. After spraying, the paint will form a paint layer 12 on the surface of the main body area 10a and the masking member 11. The paint layer 12 is usually used to achieve corresponding functions, such as scratch resistance, fingerprint resistance, anti-slip, and anti-yellowing. Thanks to the tight bond between the masking member 11 and the bonding area 10b, no other protective measures are needed during spraying. The masking member 11 can effectively ensure that the paint does not penetrate to the surface of the bonding area 10b.

[0044] Step S40: Remove the masking elements to expose the mating area.

[0045] See Figure 6d After the painting is completed, the masking part 11 needs to be removed to expose the bonding area 10b for subsequent bonding with the frame 20. Since the masking part 11 is set, after the masking part 11 is removed, the surface of the bonding area 10b will not be coated with paint, and the bonding area 10b can better bond with the frame 20.

[0046] In some embodiments, the method for removing the shielding member 11 is a physical peeling method, that is, by applying external force to the shielding member 11, the shielding member 11 can be separated from the bonding area 10b. Since the shielding member 11 and the bonding area 10b are connected by processes such as injection molding, the shielding member 11 can be separated from the bonding area 10b under the application of a certain external force. In order to prevent the shielding member 11 and the bonding area 10b from being too tightly bonded and difficult to separate, the shielding member 11 can be made of a different material than the bonding area 10b. For example, the bonding area 10b can be made of crystalline plastic, while the shielding member 11 can be made of non-crystalline plastic. The different materials of the two parts can ensure a tight connection when they are injection molded together, and also reduce the difficulty of separation.

[0047] In some embodiments, the effect of temperature on different materials can also be utilized to separate the shielding member 11 from the bonding area 10b. For example, if the back plate 10 with the shielding member 11 attached is placed in a low-temperature or high-temperature environment, the shrinkage or expansion of different materials will vary depending on the temperature. By utilizing this difference, the shielding member 11 can be separated from the bonding area 10b. For example, if the back plate 10 is placed in a 100-degree environment, the material of the back plate 10 can be a high-temperature resistant material, so it will not be affected at 100 degrees. However, the material of the shielding member 11 can be a non-high-temperature resistant material. At 100 degrees, the shielding member 11 is easily affected by the high temperature and will experience thermal expansion and contraction, or the material properties will change. The adhesion between the shielding member 11 and the bonding area 10b will weaken, and the shielding member 11 can be easily separated from the bonding area 10b with the application of a certain external force or without the application of any external force.

[0048] In some embodiments, the method for removing the masking member 11 is chemical peeling. For example, a solvent can be coated on the surface of the masking member 11. The solvent can dissolve the masking member 11 and the paint on its surface, while not dissolving the bonding area 10b. Therefore, dissolving the masking member 11 exposes the bonding area 10b. Compared to physical peeling, since the backing plate 10 does not need to withstand external force, chemical peeling will not cause deformation of the backing plate 10. In other embodiments, a solvent can be coated on the surface of the masking member 11 first to dissolve the paint on its surface. This solvent only reacts with the paint on the surface of the masking member 11. Further, after exposing the masking member 11, the first part and the masking member 11 are simultaneously immersed in another solvent. This solvent can dissolve the masking member 11 but will not react with the first part, thus exposing the bonding area 10b and protecting the first part.

[0049] Step S50: The second part of the protective shell is bonded to the bonding area by injection molding to obtain the protective shell.

[0050] See Figure 3 and Figure 6e The second part of the protective shell refers to the frame 20. The frame is bonded to the bonding area 10b by injection molding to obtain a complete protective shell. Since the surface of the bonding area 10b is not contaminated by paint during the painting process, the frame 20 and the bonding area 10b can be tightly connected during injection molding without any defects such as detachment or gaps.

[0051] Continue reading Figure 2 This application also provides another method for manufacturing a protective shell, comprising:

[0052] Step S11: The first part of the protective shell is obtained through processing. The first part includes a painted area, a non-painted area, and a bonding area.

[0053] like Figure 3 As shown, a protective case typically consists of two main parts: a back panel 10 and a frame 20. The back panel 10 is usually made of a relatively hard material such as PC, glass, or ceramic to give the protective case high overall strength and maintain its shape stability, preventing deformation. See further details. Figure 5 Taking the back panel 10 as an example, the back panel 10 includes a main body area 10a and a bonding area 10b, where the bonding area 10b is used to bond with the frame. The main body area 10a can be further divided into painted areas and unpainted areas. Painted areas refer to areas where functional paint layers need to be applied, while unpainted areas refer to areas that do not need or cannot be painted. For example, taking the back panel 10 as an example, the outer surface of the back panel is usually the surface that the user holds, and it usually needs to be painted with anti-scratch and anti-slip paint layers to achieve the corresponding functions. The inner surface of the back panel is the surface that is in contact with the phone and does not need to be painted. Therefore, the outer surface of the back panel 10 can be understood as the painted area, and the inner surface of the back panel 10 is the unpainted area.

[0054] Step S21: A masking part is formed by injection molding on the surface of the bonding area and the surface of the non-spraying area to obtain the part to be sprayed. The masking part completely covers the surface of the bonding area and the surface of the non-spraying area.

[0055] Compared to the previous embodiment where only the masking member 11 is provided on the surface of the bonding area 10b, this embodiment also provides the masking member 11 on the surface of the non-spraying area to prevent paint from adhering to the surfaces of the bonding area 10b and the non-spraying area during the spraying process.

[0056] Step S31: Spray paint on the part to be painted.

[0057] After protecting the bonding area 10b and the non-painted area using the above steps, the back panel 10 can be directly sprayed. After spraying, a paint layer 12 will form on the surface of the sprayed area and the masking member 11. The paint layer 12 is usually designed to achieve corresponding functions, such as scratch resistance, fingerprint resistance, slip resistance, and yellowing resistance. Thanks to the tight bond between the masking member 11 and the bonding area 10b and the non-painted area, no other protective measures are needed during spraying. The masking member 11 can effectively ensure that the paint does not penetrate into the bonding area 10b and the surface of the non-painted area.

[0058] Step S41: Remove the masking element to expose the mating area.

[0059] After the painting is completed, the masking element 11 needs to be removed to expose the bonding area 10b for subsequent bonding with the frame 20, while also exposing the unmasked area. Because of the masking element 11, after removing it, no paint will adhere to the surfaces of the bonding area 10b and the unmasked area. The bonding area 10b can better bond with the frame 20, while the unmasked area ensures that the product's appearance meets the requirements for sale and use.

[0060] In some embodiments, the method for removing the shielding member 11 is a physical peeling method, that is, by applying external force to the shielding member 11, the shielding member 11 can be separated from the bonding area 10b and the unshielded area. Since the shielding member 11 and the bonding area 10b are connected by processes such as injection molding, the shielding member 11 can be separated from the bonding area 10b and the unshielded area under the application of a certain external force. In order to prevent the shielding member 11 from being too tightly bonded to the bonding area 10b and the unshielded area and difficult to separate, the shielding member 11 can be made of a different material than the bonding area 10b and the unshielded area. For example, the bonding area 10b and the unshielded area can be made of crystalline plastic, while the shielding member 11 can be made of non-crystalline plastic. The different materials of the two components can ensure a tight connection when they are injection molded together, and reduce the difficulty of separation.

[0061] In some embodiments, the effect of temperature on different materials can also be utilized to separate the shielding member 11 from the bonding area 10b and the unshielded area. For example, when the back plate 10 with the shielding member 11 attached is placed in a low-temperature or high-temperature environment, the shrinkage or expansion of different materials will vary depending on the temperature. By utilizing this difference, the shielding member 11 can be separated from the bonding area 10b and the unshielded area. For example, when the back plate 10 is placed in a 100-degree environment, the material of the back plate 10 can be a high-temperature resistant material, so the material of the back plate 10 will not be affected at 100 degrees. However, the material of the shielding member 11 can be a non-high-temperature resistant material. At 100 degrees, the shielding member 11 is easily affected by the high temperature and will undergo thermal expansion and contraction, or the material properties will change. The adhesion between the shielding member 11 and the bonding area 10b and the unshielded area will weaken. With the application of a certain external force or without the application of any external force, the shielding member 11 can be easily separated from the bonding area 10b and the unshielded area.

[0062] In some embodiments, the method for removing the masking member 11 is chemical peeling. For example, a solvent can be coated on the surface of the masking member 11. The solvent can dissolve the masking member 11 and the paint on its surface, while the solvent will not dissolve the bonding area 10b or the unmasked area. Therefore, after dissolving the masking member 11, the bonding area 10b and the unmasked area can be exposed. Compared to physical peeling, since the backing plate 10 does not need to withstand external force, chemical peeling will not cause deformation of the backing plate 10. In other embodiments, a solvent can be coated on the surface of the masking member 11 first to dissolve the paint on its surface. This solvent will only react with the paint on the surface of the masking member 11. Further, after exposing the masking member 11, the first part and the masking member 11 are simultaneously immersed in another solvent. This solvent can dissolve the masking member 11 but will not react with the first part, thereby exposing the bonding area 10b and the unmasked area and protecting the first part.

[0063] In some embodiments, to ensure better results from the physical or chemical peeling methods described above, the first part and the shielding member 11 are made of different materials. For example, the first part may be made of crystalline plastic, while the shielding member 11 may be made of amorphous plastic. Different materials often exhibit different physical or chemical properties, which is more conducive to separating the two using physical or chemical peeling methods. In other embodiments, the first part may be made of amorphous plastic, while the shielding member 11 may be made of crystalline plastic.

[0064] In some embodiments, to ensure that the first part does not deform due to temperature during the physical peeling method performed in a high-temperature environment, it is necessary to ensure that the melting point of the first part is greater than the melting point of the shielding member 11, and that the temperature of the high-temperature environment is close to the melting point of the shielding member 11. The shielding member 11 will melt at high temperatures to separate from the first part, while the first part will not change under the high-temperature environment. More preferably, the difference between the melting point of the first part and the melting point of the shielding member should be greater than or equal to 30 degrees Celsius. This can more effectively prevent changes in the first part under high-temperature conditions, and even if the temperature of the high-temperature environment is difficult to control and fluctuates within a small range, it will not affect the first part, effectively improving production yield.

[0065] In some embodiments, see Figure 5 , Figure 7 and Figure 8The first part is the back plate 10 of the protective shell. The mating area 10b is a protrusion protruding from the side of the back plate 10. The protrusion extends along the circumferential direction of the side of the back plate 10, that is, a protrusion is provided on the entire circumference of the side of the back plate 10. The shielding member 11 is a ring-shaped structure and surrounds the side of the back plate 10. The side of the shielding member 11 away from the back plate 10 also protrudes from the clamping part 111. During the spraying operation, the clamp can clamp the clamping part 111 to prevent the back plate 10 and the shielding member 11 from shaking and to ensure uniform spraying. Furthermore, grooves, through holes or protrusions can be provided on the clamping part 111 to facilitate clamping.

[0066] In some embodiments, further refer to Figure 9 The shielding member 11 can be divided into a first shielding part 11a and a second shielding part 11b. Figure 9 The dotted line shown is the boundary line between the first shielding part 11a and the second shielding part 11b. The first shielding part 11a and the second shielding part 11b together form a ring to surround the side cover of the back panel 10. One end of the first shielding part 11a is provided with a first removal part 112, and the other end is provided with a second removal part 113. The first removal part 112 and the second removal part 113 are respectively located at opposite ends of the back panel 10. For example... Figure 7 In the illustrated embodiment, the first removal part 112 and the second removal part 113 are respectively located at both ends of the back plate 10 along its length; one end of the second shielding part 11b is provided with a third removal part 114, and the other end is provided with a fourth removal part 115, the third removal part 114 and the fourth removal part 115 being located at opposite ends of the back plate 10, for example... Figure 7 In the embodiment shown, the third removal part 114 and the fourth removal part 115 are located at both ends of the back plate 10 in the length direction; wherein, the first removal part 112 and the third removal part 114 are arranged close to each other and connected to each other, and the second removal part 113 and the fourth removal part 115 are arranged close to each other and connected to each other.

[0067] Furthermore, the removal parts (i.e., the first to fourth removal parts) can all be provided with structures such as grooves, through holes, or protrusions. When physically peeling off the shielding part 11, a tool can be connected to the first removal part 112 and the third removal part 114, and opposite forces can be applied to the first removal part 112 and the third removal part 114 to separate them, thereby causing the first shielding part 11a and the second shielding part 11b to separate from the back plate. In other embodiments, the tool can also be connected to the second removal part 113 and the fourth removal part 115, and opposite forces can be applied to the second removal part 113 and the fourth removal part 115 to separate them, thereby causing the first shielding part 11a and the second shielding part 11b to separate from the back plate. Alternatively, opposite forces can be applied to the first removal part 112 and the third removal part 114, while opposite forces are applied to the second removal part 113 and the fourth removal part 115, in order to remove the shielding member 11.

[0068] The above provides a detailed description of a method for manufacturing a protective shell according to an embodiment of this application. This document uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method for manufacturing a protective shell and its core ideas. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A method for manufacturing a protective shell, characterized in that, include: The first part of the protective shell is obtained through processing, and the first part includes a main body area and a bonding area; A masking element is formed on the surface of the bonding area by injection molding to obtain a part to be sprayed. The masking element completely covers the surface of the bonding area and is in close contact with the bonding area. Spray the workpiece to be coated; Remove the masking element to expose the bonding area; The protective shell is obtained by injection molding the second part of the protective shell onto the bonding area.

2. The method for manufacturing a protective shell according to claim 1, characterized in that, The material of the first part is different from that of the shielding component. The material of the first part is either crystalline plastic or amorphous plastic, and the material of the shielding component is either crystalline plastic or amorphous plastic.

3. The method for manufacturing a protective shell according to claim 1, characterized in that, The melting point of the material in the first part is greater than the melting point of the material in the shielding member, and the difference between the melting point of the first part and the melting point of the shielding member is greater than or equal to 30 degrees Celsius.

4. The method for manufacturing a protective shell according to claim 1, characterized in that, The method for removing the shielding component is a physical peeling method, which includes: An external force is applied to the shielding component to separate it from the bonding area; or the shielding component and the first part are placed in a low-temperature or high-temperature environment, utilizing the effect of temperature on different materials to separate the shielding component from the bonding area.

5. The method for manufacturing a protective shell according to claim 1, characterized in that, The method for removing the shielding element is a chemical stripping method, which includes: A solvent is coated on the surface of the shielding member to dissolve the shielding member and expose the bonding area; or the first part and the shielding member are both immersed in a solvent to dissolve the shielding member and expose the bonding area, and the solvent does not react with the first part.

6. The method for manufacturing a protective shell according to claim 1, characterized in that, The first part is the back plate of the protective shell, the bonding area is a protrusion protruding from the side of the back plate, the protrusion extends in the circumferential direction along the side of the back plate, the shielding member surrounds the side of the back plate, and the shielding member also has a clamping part protruding from the side away from the side of the back plate.

7. The method for manufacturing a protective shell according to claim 6, characterized in that, The shielding component includes a first shielding part and a second shielding part, which together surround the side of the back panel. One end of the first shielding part is provided with a first removal part, and the other end of the first shielding part is provided with a second removal part. The first removal part and the second removal part are respectively located at opposite ends of the back panel. One end of the second shielding part is provided with a third removal part, and the other end of the second shielding part is provided with a fourth removal part. The third removal part and the fourth removal part are respectively located at opposite ends of the back panel. The first removal part and the third removal part are arranged close to each other and connected to each other, and the second removal part and the fourth removal part are arranged close to each other and connected to each other.

8. The method for manufacturing a protective shell according to claim 7, characterized in that, The method for removing the shielding component is a physical peeling method, which includes: Opposite forces are applied to the first removal part and the third removal part to separate the first removal part from the third removal part, and both the first shielding part and the second shielding part are separated from the back plate; Alternatively, opposite forces may be applied to the second removal part and the fourth removal part to separate the first removal part from the third removal part, and to separate both the first shielding part and the second shielding part from the back plate; Alternatively, opposite forces may be applied to the first removal part and the third removal part, and opposite forces may be applied to the second removal part and the fourth removal part, so that the first removal part is separated from the third removal part, and both the first shielding part and the second shielding part are separated from the back panel.

9. A method for manufacturing a protective shell, characterized in that, include: The first part of the protective shell is obtained by processing, and the first part includes a sprayed area, a non-sprayed area and a bonding area; A masking element is formed by injection molding on the surface of the bonding area and the surface of the non-sprayed area to obtain a part to be sprayed. The masking element completely covers the surface of the bonding area and the surface of the non-sprayed area, and the masking element is tightly fitted to the bonding area. Spray the workpiece to be coated; Remove the masking element to expose the bonding area and the unpainted area; The protective shell is obtained by injection molding the second part of the protective shell onto the bonding area.

10. The method for manufacturing a protective shell according to claim 9, characterized in that, The method for removing the shielding component is a physical peeling method, which includes: An external force is applied to the shielding component to separate it from the bonding area and the non-coated area; or the shielding component and the first part are placed in a low-temperature or high-temperature environment, utilizing the effect of temperature on different materials to separate the shielding component from the bonding area and the non-coated area.

11. The method for manufacturing a protective shell according to claim 9, characterized in that, The method for removing the shielding element is a chemical stripping method, which includes: A solvent is coated on the surface of the masking component to dissolve the masking component, thereby exposing the bonding area and the non-coated area; or the first portion and the masking component are both immersed in a solvent to dissolve the masking component, thereby exposing the bonding area and the non-coated area, and the solvent does not react with the first portion.

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