Flexible film, in-mold insert injection molded structure, apparatus having the structure, and method of processing thereof

Abstract

The present application provides a flexible film, an in-mold insert injection structure, an apparatus with the in-mold insert injection structure, and a processing method of the in-mold insert injection structure, the flexible film is used for in-mold insert injection, a back surface of the flexible film is provided with micro flow channels, and a periphery of the flexible film is provided as a bevel, so that an area of the back surface of the flexible film is greater than an area of a front surface thereof.

Description

Technical Field

[0001] This disclosure relates to a flexible film, an in-mold insert injection molding structure, an apparatus having an in-mold insert injection molding structure, and a method for processing the in-mold insert injection molding structure. Background Technology

[0002] In-mold insert (IML) is an advanced injection molding process that allows decorative films (such as labels, patterns, etc.) to be directly bonded to a plastic matrix during injection molding to form a one-piece product. However, when flexible films are used as inserts, film peeling often occurs, especially when the product is used outdoors for extended periods, which exacerbates the problem. Summary of the Invention

[0003] The technical problem to be solved by the present invention

[0004] For structures manufactured using IML technology (e.g., decorative panels of various shapes), the inserts are exposed on the surface, covered by a hardened transparent film. The pattern layer is in the middle of the insert, and the back of the insert is an injection-molded layer, forming a single unit with the injection-molded shell. Because the ink is sandwiched in between, the product surface is protected from scratches and is resistant to abrasion, maintaining vibrant colors for a long time without fading. However, when flexible films are used as inserts, panels manufactured using IML technology often suffer from warping issues in the inserts (i.e., the flexible film).

[0005] Specifically, because IML injection molded products have exposed edges, that is, the cut surfaces of the film that are not covered by plastic are exposed to the air, warping often occurs.

[0006] The main reasons for warpage and deformation in IML (In-Mold Insert) products can be summarized as follows:

[0007] 1. Improper gating system design: The location, form and number of gates are not reasonable and will affect the filling state of plastic in the mold, resulting in deformation of the plastic part; if the flow distance is too long, the internal stress caused by the flow and shrinkage between the frozen layer and the central flow layer will increase, thus causing warping deformation.

[0008] 2. Uneven cooling rate: Uneven cooling rate of plastic parts will result in uneven shrinkage of the plastic parts. This difference in shrinkage will lead to the generation of bending moment, which will cause the plastic parts to warp.

[0009] 3. Temperature difference during the plasticizing process: The temperature difference of the polymer in the axial and radial directions (relative to the screw) will cause stress in the plastic; the injection pressure, rate and other parameters of the injection molding machine will greatly affect the orientation of molecules during filling, thus causing warping deformation.

[0010] 4. Mold Design and Material Selection: Factors such as the gating system, cooling system, and ejection system in mold design can affect the deformation of plastic parts; the choice of materials can also affect the coefficient of thermal expansion of plastic parts, and the difference in the coefficient of thermal expansion of different materials may cause the plastic parts to warp during use.

[0011] This invention was made to solve the above-mentioned problems, and its purpose is to provide a flexible film, an in-mold insert injection structure, an apparatus with an in-mold insert injection structure, and a processing method for the in-mold insert injection structure. By enhancing the adhesion of the flexible film to the injection molded shell, the warping problem of the flexible film is solved, thereby ensuring the quality and aesthetics of the product.

[0012] Technical solutions adopted to solve technical problems

[0013] According to an embodiment of this disclosure, in one aspect of the invention, a flexible film is used for in-mold insert injection molding. The back side of the flexible film is provided with microchannels, and the periphery of the flexible film is provided with beveled edges, such that the area of ​​the back side of the flexible film is larger than the area of ​​its front side.

[0014] Furthermore, one aspect of the in-mold insert injection molding structure disclosed herein includes: the flexible film described above; and an injection-molded shell formed by injection molding the flexible film as an insert outside the flexible film using in-mold insert injection molding technology.

[0015] Furthermore, in one aspect of the present disclosure, the device having an in-mold insert injection molding structure is the structure described in the above-described aspect, and the front side of the flexible film is exposed on the surface of the device, serving as a panel of the device.

[0016] Furthermore, one aspect of the processing method for the in-mold insert injection molding structure disclosed herein includes the following steps: a flexible film manufacturing step, wherein the flexible film has a transparent layer on the front, a patterned layer in the middle, and an injection molding layer on the back; a microchannel manufacturing step, wherein multiple microchannels are processed on the injection molding layer of the flexible film using a nano-scribing tool; a peripheral processing step, wherein the periphery of the flexible film is processed into bevels, such that the area of ​​the back of the flexible film is larger than the area of ​​its front; and an injection molding step, wherein an injection-molded shell is formed on the outside of the flexible film using in-mold insert injection molding technology, with the flexible film as an insert.

[0017] The effects of the invention

[0018] The flexible film, in-mold insert injection structure, equipment with in-mold insert injection structure, and processing method of in-mold insert injection structure involved in this invention can enhance the adhesion of flexible film to injection molded shell, thereby solving the warping problem of flexible film and ensuring product quality and aesthetics. Attached Figure Description

[0019] This disclosure can be better understood by describing exemplary embodiments of the present disclosure in conjunction with the accompanying drawings, in which:

[0020] Figure 1 This is a rear perspective view of a device with an in-mold insert injection molding structure according to an embodiment of the present invention.

[0021] Figure 2 This is a front perspective view of a device with an in-mold insert injection molding structure according to an embodiment of the present invention.

[0022] Figure 3 This is a cross-sectional view of an apparatus with an in-mold insert injection molding structure according to an embodiment of the present invention.

[0023] Figure 4 yes Figure 3 A magnified view of region A in the image.

[0024] Figure 5 This is a schematic diagram illustrating the structure of the flexible film according to an embodiment of the present invention.

[0025] Figure 6 This is a diagram illustrating the warping.

[0026] Figure 7 This is a diagram illustrating other cases of warping.

[0027] Figure 8 This is a schematic diagram showing the spacing between microchannels processed on the injection molding layer.

[0028] Figure 9 It is a cross-sectional view showing the shape of the microchannel.

[0029] Figure 10 This is a cross-sectional view showing other shapes of microchannels.

[0030] Figure 11 This is a schematic diagram showing the shape of the periphery of the flexible film.

[0031] Figure 12 This is a schematic diagram illustrating the situation when warping occurs.

[0032] Labeling explanation: 1 Injection molded shell, 2 Flexible film, 3 Exposed edge, 201 Transparent layer, 202 Patterned layer, 203 Injection molded layer, 41, 42 Warpage, 2031 Microchannel, b1 Distance between the outermost microchannel and the edge of the flexible film, b2 Spacing between microchannels, α Embedding angle, β Angle of the bevel. Detailed Implementation

[0033] The following describes specific embodiments of this disclosure. It should be noted that, in order to provide a concise description, this specification cannot exhaustively describe all features of the actual embodiments. It should be understood that, in the actual implementation of any embodiment, just as in any engineering or design project, various specific decisions are often made to achieve the developer's specific goals and to meet system-related or business-related constraints, and this can change from one embodiment to another. Furthermore, it is understood that although the efforts made in this development process may be complex and lengthy, for those skilled in the art related to the content disclosed in this disclosure, changes in design, manufacturing, or production based on the technical content disclosed in this disclosure are merely conventional technical means and should not be construed as insufficient content of this disclosure.

[0034] Unless otherwise defined, the technical or scientific terms used in the claims and description shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this patent application description and claims do not indicate any order, quantity, or importance, but are merely used to distinguish different components. The terms “an” or “a” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “comprising” or “including” and similar terms mean that the element or object preceding “comprising” or “including” encompasses the element or object listed following “comprising” or “including” and its equivalents, and do not exclude other elements or objects. The terms “connected” or “linked” and similar terms are not limited to physical or mechanical connections, nor are they limited to direct or indirect connections.

[0035] Unless otherwise specified, all embodiments and preferred embodiments mentioned herein can be combined to form new technical solutions. Similarly, unless otherwise specified, all technical features and preferred features mentioned herein can be combined to form new technical solutions.

[0036] Hereinafter, with reference to the accompanying drawings, a detailed description will be given of the flexible film, the in-mold insert injection structure, the equipment having the in-mold insert injection structure, and the processing method of the in-mold insert injection structure involved in the embodiments of the present invention.

[0037] Figure 1 This is a rear perspective view of a device with an in-mold insert injection molding structure according to an embodiment of the present invention. Figure 2 This is a front perspective view of a device with an in-mold insert injection molding structure according to an embodiment of the present invention. Figure 3 This is a cross-sectional view of an apparatus with an in-mold insert injection molding structure according to an embodiment of the present invention.

[0038] As an example, the device with an in-mold insert injection molding structure involved in the embodiments of the present invention is configured as a charging pile. Figure 1 As shown, the back of the charging station's panel has installation markings, clips, screw posts, etc. This side faces the charging station and is used to cover and shield the interior of the charging station.

[0039] Figure 2 The image shown is the front of the charging station's panel. Its design is simple, featuring the company logo and various patterns. These patterns are formed using IML technology as part of an inlay. The surface is a hardened transparent layer, the middle is a pattern layer (ink layer), and the back is an injection-molded layer. This process makes the pattern layer resistant to external scratches and ensures that the colors remain vibrant and the patterns are clear for a long time.

[0040] Figure 3 The image shows a cross-sectional view of the charging station's panel. The section with the diagonal lines is the outer layer of the panel, i.e., the panel surface formed by the IML (Integrated Molding Layer).

[0041] Figure 4 yes Figure 3 A magnified view of region A in the image.

[0042] like Figure 4 As shown, region A is an enlarged view of the edge of the device (charging pile panel) with an in-mold insert injection molding structure according to an embodiment of the present invention. The device (charging pile panel) with the in-mold insert injection molding structure includes an injection-molded shell 1 and a flexible film 2. Here, the flexible film 2 serves as an insert, and the injection-molded shell 1 is formed by injection molding onto the insert. At this time, the flexible film 2 and the injection-molded shell 1 are fused together to form a complete charging pile panel.

[0043] Additionally, number 3 refers to the exposed edge portion. In fact, this is commonly found at the edges of charging station panels. Figure 4 The exposed edges (sometimes called exposed white areas) shown in Figure 3 are often caused by manufacturing tolerances. It is difficult to avoid this when manufacturing using existing IML technology.

[0044] Figure 5 This is a schematic diagram further illustrating the specific structure of the flexible thin film 2.

[0045] like Figure 5 As shown, the flexible film 2 has a three-layer structure, including a transparent layer 201 on the front, a pattern layer (ink layer) 202 in the middle, and an injection-molded layer 203 on the back. The "front" refers to the surface exposed to the outside of the panel and where the pattern is clearly visible. The "back" refers to the surface fused with the injection-molded housing 1 and cannot be directly observed from the outside.

[0046] During manufacturing, a flexible film 2 is used as an insert, and injection molding is performed on the outside of the flexible film 2 to form an injection-molded shell 1. The two are then fused together to form a complete panel.

[0047] However, when the adhesion between the injection layer 203 and the injection shell 1 is insufficient, warping will occur at the exposed edge portion 3.

[0048] Figure 6 This is a diagram showing the case of warping 41.

[0049] like Figure 6 As shown, due to insufficient adhesion between the injection molding layer 203 and the injection molding shell 1, warping 41 occurs at the exposed edge portion 3. In this case, the flexible film 2 tends to peel off from the injection molding shell 1.

[0050] In addition, warping can also occur when the adhesion between the pattern layer 202 and the injection layer 203 is insufficient.

[0051] Figure 7 This is a diagram showing the case of warping 42.

[0052] like Figure 7 As shown, in manufacturing the flexible film 2, a transparent layer 201 and an injection-molded layer 203 are first provided, and then a pattern layer 202 is added therein. The pattern layer 202 is generally formed using a high-viscosity ink, and the transparent layer 201, pattern layer 202, and injection-molded layer 203 are bonded together by electrostatic adsorption. However, after long-term use, the ink in the pattern layer 202 gradually dries, and the adhesion (bonding force) of the ink in the pattern layer 202 to the transparent layer 201 or injection-molded layer 203 decreases, so it is possible that... Figure 7 Such warping 42. That is to say, in this case, the flexible film 2 itself has a tendency to peel (delaminate). The following discloses a method for solving this problem.

[0053] As a method to prevent warping, microchannels are fabricated on the injection layer 203 through micromachining.

[0054] Micromachining is a precision manufacturing technique primarily used to produce tiny parts and structures. This technology has wide applications in many fields, achieving highly precise dimensions and shapes through minimal material removal.

[0055] Microchannels are a core component of microfluidics technology; they are tiny channels used to control and manipulate fluids at a microscale. Here, we employ microchannels with equivalent diameters of 10-1000 micrometers. The fluid flowing within these microchannels is called microfluidic, specifically referring to fluid behavior at the 1-1000 micrometer scale. By fabricating microchannels on the injection-molded layer 203, we can guide and control fluids in extremely small volumes.

[0056] Figure 8 This is a schematic diagram showing the spacing between the microchannels 2031 processed on the injection layer 203. Figure 9 yes Figure 8 The enlarged view of region B in the figure is a cross-sectional view showing the shape of the microchannel 2031 in the embodiment of the present invention.

[0057] like Figure 9 As shown, multiple microchannels 2031 are fabricated on the injection molding layer 203 by micromachining (e.g., using tools such as nano-sculptors).

[0058] By processing multiple microchannels 2031 on the injection molding layer 203, liquid plastic and other materials flow into the injection molding layer 203 along the microchannels 2031 during injection molding. After the plastic cools and solidifies, it forms an injection-molded shell 1 that is integrated with the flexible film 2. At this time, the contact area between the injection-molded shell 1 and the injection molding layer 203 increases, and an embedded structure corresponding to the shape of the microchannels 2031 is formed. In this case, because the contact area between the injection-molded shell 1 and the injection molding layer 203 is increased and an embedded structure is formed, the adhesion between the two is enhanced, thereby preventing the occurrence of lifting 41.

[0059] The following section provides a more detailed description of the location and shape of the multiple microchannels 2031.

[0060] like Figure 8 As shown, multiple microchannels 2031 are arranged parallel to each other and spaced apart on the injection molding layer 203. If their spacing is set to b2, considering the fluidity and adhesion of the liquid plastic during injection molding, the spacing b2 between the microchannels 2031 is preferably 1mm≤b2≤4mm.

[0061] If the spacing between multiple microchannels 2031 is too small, it may be difficult to ensure that the liquid plastic flows evenly into each microchannel 2031 during injection molding, thus causing uneven injection molding.

[0062] If the spacing between multiple microchannels 2031 is too large, although an embedded structure can be formed between the injection-molded shell 1 and the injection-molded layer 203, the number of embedded structures is too small, resulting in limited improvement in the adhesion between the injection-molded shell 1 and the injection-molded layer 203. Therefore, the effect of preventing warping 41 will be worse.

[0063] Furthermore, considering edge strength, the microchannel 2031 should not be too close to the edge of the flexible film 2 (i.e., the exposed edge portion 3). If the outermost microchannel 2031 is too close to the edge of the flexible film 2 (i.e., the exposed edge portion 3), the edge strength may be insufficient, and the edge of the flexible film 2 may break during subsequent injection molding, causing the exposed edge portion 3 to increase further, thereby increasing the possibility of warping 41. Therefore, when the distance between the outermost microchannel 2031 and the edge of the flexible film 2 is set to b1, it is preferable to satisfy 0.5mm ≤ b1 ≤ 1mm.

[0064] Regarding the shape of the microchannel 2031, it should be designed to not obstruct the flow of liquid plastic into the microchannel 2031 during injection molding, and to form an embedded structure between the flexible film 2 and the injection-molded shell 1. Specifically, if the opening of the microchannel 2031 is too small, the liquid plastic may sometimes have difficulty flowing smoothly into the microchannel due to its fluidity. Conversely, if the opening is too large, although it will not affect the flow of liquid plastic, it may not be possible to achieve an effective embedded structure. In this case, the adhesion between the injection-molded shell 1 and the injection-molded layer 203 cannot be improved, leading to the unavoidable occurrence of warpage 41.

[0065] In implementation method 1, such as Figure 9 As shown, the (cross-sectional) shape of the microchannel 2031 is set as a trapezoid, and its embedding angle is set as α. The trapezoidal shape ensures that an embedding structure can be achieved between the injection-molded shell 1 and the injection-molded layer 203 after the liquid plastic cools. Furthermore, to avoid obstructing the flow of liquid plastic into the microchannel 2031, the embedding angle α is preferably set to 45°≤α≤60°.

[0066] According to the embodiments of the present invention, by processing trapezoidal microchannels 2031 on the injection molding layer 203 located on the back side of the flexible film 2, the contact area between the injection molding layer 203 of the flexible film 2 and the injection molding shell 1 is increased after injection molding, and an embedded structure is formed between the two, thus preventing warping 41 at the exposed edge portion 3.

[0067] In the above embodiment, a microchannel 2031 formed in a trapezoidal shape is shown. However, the shape of the microchannel 2031 is not limited to this.

[0068] Figure 10 yes Figure 9The enlarged view of region B in the figure is a cross-sectional view showing other shapes of the microchannel 2031 in the embodiment of the present invention.

[0069] like Figure 10 As shown, the cross-section of the microchannel 2031 in Embodiment 2 is circular. In this case, during the injection molding process, the liquid plastic can flow smoothly into the microchannel 2031, and after cooling and solidification, an embedded structure can be achieved between the injection-molded shell 1 and the injection-molded layer 203. Here, the radius of the circular shape can be designed as needed, as long as it does not hinder the flow of liquid plastic into the microchannel 2031 during the injection molding process.

[0070] Furthermore, examples are shown here of multiple microchannels 2031 in trapezoidal and circular shapes, but it is not limited to these. As long as the shape does not hinder the flow of liquid plastic into the microchannel 2031 during injection molding and can form an embedded structure between the flexible film 2 and the injection-molded shell 1 formed by injection molding, it is acceptable.

[0071] According to the embodiments of the present invention, the flexible film has a circular microchannel 2031 processed on the injection layer 203 on the back side of the flexible film 2, thereby increasing the contact area between the injection layer 203 of the flexible film 2 and the injection shell 1 after injection molding and forming an embedded structure between them, thus preventing warping 41 at the exposed edge portion 3.

[0072] The above discussion addressed the case where the injection-molded layer 203 of the flexible film 2 peels off from the injection-molded shell 1, resulting in warping 41. The following discussion addresses the case where the flexible film 2 itself peels off, causing warping 42.

[0073] like Figure 7 As shown, when the transparent layer 201 bends, causing the intermediate pattern layer 202 to peel off from the injection molding layer 203 and resulting in warping 42, this problem is difficult to solve simply by setting the microchannels 2031. Here, a method to solve this problem is proposed.

[0074] Figure 11 This is a schematic diagram showing the shape of the periphery of the flexible film 2. Figure 12 This is a schematic diagram of the situation when warping 42 occurs.

[0075] like Figure 11 As shown, the periphery (edge) of the flexible film 2 is set as a bevel, so that the area of ​​the back side of the flexible film 2 is larger than the area of ​​its front side.

[0076] Specifically, firstly, using tools such as nano-scribing tools, the periphery (edge) of the flexible film 2 is processed into a bevel, with the angle of this bevel set as β. At this time, the interface between the injection-molded shell 1 and the flexible film 2 also changes accordingly, that is, a whole bevel is formed at the interface. Among them, 31 is the exposed edge portion under this structure, which also becomes a bevel. In other words, the exposed edge portion 31 is matched with the periphery of the flexible film 2 to form a bevel.

[0077] like Figure 12 As shown, due to the presence of the bevel, even if there is exposed edge and ink drying phenomenon, when the transparent layer 201 is bent, the warped part of the flexible film 2 will be blocked by the edge part of the injection molded shell 1, so warping 42 will not occur.

[0078] Furthermore, considering the peeling angle of the flexible film 2 and the strength of the edge of the injection-molded shell 1, the angle β of the bevel is preferably 20°≤β≤30°.

[0079] According to the flexible film of the present invention, the periphery of the flexible film 2 is set as a bevel, so that the area of ​​the back side of the flexible film 2 is larger than the area of ​​its front side, thereby forming an exposed edge portion 31 of the bevel at the interface between the injection molded shell 1 and the flexible film 2. At this time, when the transparent layer 201 is bent, the warped part of the flexible film 2 will be blocked by the edge portion of the injection molded shell 1, thus preventing the warping 42 from occurring.

[0080] In reality, as the product is used, the injection molding layer 203 of the flexible film 2 will gradually age, and the ink in the pattern layer 202 will gradually dry. Therefore, warping 41 and warping 42 often occur, the difference being that they occur at different times. In this case, the method described above can be used to arrange microchannels 2031 on the back side of the flexible film 2 and make the periphery of the flexible film 2 beveled, so that the area of ​​the back side of the flexible film 2 is larger than the area of ​​its front side. This not only prevents warping 41 caused by the peeling of the flexible film 2 from the injection molding shell 1, but also prevents warping 42 caused by the peeling of the flexible film 2 itself.

[0081] Furthermore, this invention provides an in-mold insert injection molding structure, comprising: the flexible film described above; and an injection-molded shell formed by injection molding the flexible film as an insert onto the outside of the flexible film using in-mold insert injection molding technology. In this in-mold insert injection molding structure, microchannels are arranged on the back side of the flexible film, and the periphery of the flexible film is beveled, such that the area of ​​the back side of the flexible film is larger than the area of ​​its front side. This not only prevents warping caused by the peeling of the flexible film from the injection-molded shell, but also prevents warping caused by the peeling of the flexible film itself.

[0082] Furthermore, the present invention provides a device with an in-mold insert injection molding structure, comprising the in-mold insert injection molding structure described above. The front side of the flexible film is exposed on the surface of the device, serving as the device's panel. As an example, this device with the in-mold insert injection molding structure can be a charging pile device. In such a device, patterns are clearly displayed on the surface of the device and protected by a hard, transparent layer, making it less prone to scratches and damage. Furthermore, the flexible film is less prone to warping, thus improving the product's quality and aesthetics.

[0083] Furthermore, this invention provides a method for processing an in-mold insert injection molding structure, comprising the following steps: a flexible film manufacturing step, wherein a flexible film has a transparent front layer, a patterned middle layer, and an injection-molded back layer; a microchannel manufacturing step, wherein multiple microchannels are processed on the injection-molded back layer of the flexible film using a nano-scribing tool; a peripheral processing step, wherein the periphery of the flexible film is processed into bevels, such that the area of ​​the back of the flexible film is larger than the area of ​​its front; and an injection molding step, wherein an injection-molded shell is formed on the outside of the flexible film using in-mold insert injection molding technology, with the flexible film as an insert. This processing method avoids warping of the flexible film, thereby improving the quality and aesthetics of the product.

[0084] It should be understood that the above description is illustrative and not restrictive. For example, the above embodiments (and / or aspects thereof) can be used in combination with each other. Furthermore, many modifications can be made to adapt particular conditions or materials to the teachings of the various embodiments of the invention without departing from the scope of the invention. While the dimensions and types of materials described herein are used to define parameters of the various embodiments of the invention, the embodiments are not intended to be restrictive but are exemplary. Many other embodiments will become apparent to those skilled in the art upon reading the above description. Therefore, the scope of the various embodiments of the invention should be determined by reference to the appended claims and the full scope of their equivalents.

Claims

1. A flexible film for in-mold insert injection molding, characterized in that, The flexible film has microchannels arranged on its back side. The flexible film has beveled edges around its perimeter, such that the area of ​​the back side of the flexible film is larger than the area of ​​its front side. The flexible film has a three-layer structure, comprising a transparent layer on the front, a patterned layer in the middle, and an injection-molded layer on the back. Multiple microchannels are arranged and disposed on the injection-molded layer located on the back side of the flexible film. Multiple microchannels are arranged parallel to each other and spaced apart on the injection molding layer. If the spacing between the multiple microchannels is set to b2, then the configuration is 1mm≤b2≤4mm.

2. The flexible film as described in claim 1, characterized in that, The plurality of microchannels are configured to not impede the flow of liquid plastic into the microchannels during injection molding and to form an embedded structure during the injection molding of the in-mold insert.

3. The flexible film as described in claim 1, characterized in that, The cross-sections of the multiple microchannels are trapezoidal.

4. The flexible film as described in claim 3, characterized in that, If the embedding angle of the multiple microchannels is set to α, then it is configured as 45°≤α≤60°.

5. The flexible film as described in claim 1, characterized in that, The cross-sections of the multiple microchannels are circular.

6. The flexible film as described in claim 1, characterized in that, If the distance between the outermost microchannel and the edge of the flexible film is set as b1, then it is configured to be 0.5mm≤b1≤1mm.

7. The flexible film as described in claim 1, characterized in that, There is an exposed edge portion between the flexible film and the injection-molded shell formed by injection molding. The exposed edge portion is shaped to match the periphery of the flexible film, forming a bevel.

8. The flexible film as described in claim 1, characterized in that, If the angle of the hypotenuse is set to β, then it is configured as 20°≤β≤30°.

9. An in-mold insert injection molding structure, characterized in that, include: The flexible film according to any one of claims 1-8; as well as An injection-molded shell is formed by injection molding the flexible film as an insert on the outside of the flexible film using in-mold insert injection molding technology.

10. An apparatus with an in-mold insert injection molding structure, characterized in that, The in-mold insert injection molding structure is the structure described in claim 9. The front side of the flexible film is exposed on the surface of the device, serving as the panel of the device.

11. The equipment with an in-mold insert injection molding structure as described in claim 10, characterized in that, The device in question is a charging station.

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