A mobile phone middle frame glass fiber in-mold forming assembly
By coordinating the design of the pre-positioning tooling system and the mid-frame anti-deformation structure, the problem of inaccurate positioning between glass fiber prepreg layers was solved, achieving stability and dimensional accuracy of the mid-frame at high temperatures, and improving the strength and signal transmittance of the mobile phone mid-frame.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- ZHEJIANG TRILLION GAME TECH
- Filing Date
- 2025-06-26
- Publication Date
- 2026-06-02
AI Technical Summary
In existing technologies, the interlayer positioning of fiberglass prepreg is inaccurate, which makes the mobile phone frame prone to deformation at high temperatures. In addition, traditional mold designs lack narrow-edge reinforcement structures, affecting the positioning accuracy and strength of the product.
The design employs a pre-positioning tooling system and a mid-frame anti-deformation structure. By interlocking the positioning posts of the stacking tooling with the positioning holes of the fiberglass prepreg, combined with the through stud structure, a three-level positioning system is formed to ensure precise alignment between layers. The sealed cavity design of the mid-frame outer shape limiting frame prevents molten resin from overflowing.
It significantly improves the positioning accuracy between fiberglass layers, reduces the deformation risk of composite material frames, increases the product qualification rate and structural strength, and ensures the dimensional accuracy and electromagnetic shielding performance of the frames.
Smart Images
Figure CN224311270U_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of mobile device structural component manufacturing, specifically to a glass fiber mold inner mold forming component for a mobile phone mid-frame. Background Technology
[0002] As smartphones become thinner, lighter, and more high-performance, higher demands are placed on the strength, rigidity, lightweight design, and electromagnetic shielding performance of the phone's frame. While traditional all-metal frames offer high strength and a premium feel, they are relatively heavy and have disadvantages in signal penetration at certain frequency bands. Glass fiber reinforced composite materials, on the other hand, offer advantages such as light weight, high strength, relatively low cost, high design flexibility, and good signal transmittance, making them an ideal choice for mobile phone structural components.
[0003] A search revealed a Chinese patent document, application number 202411653358.4, publication number CN119590024A, which discloses a molding die for a mobile phone frame. The die includes a lower template, an upper template, and an outer frame. This patent uses a detachable outer frame design, but it lacks an interlayer positioning mechanism for the fiberglass prepreg, resulting in a high risk of misalignment when multiple layers are stacked. Furthermore, it does not have a narrow-edge reinforcement structure, making the aluminum alloy frame prone to deformation at high temperatures.
[0004] This invention solves the problems of interlayer positioning and metal insert stability in the pre-molding stage by coordinating the pre-positioning tooling system and the mid-frame anti-deformation structure. Especially for the deformation risk of mid-frames in narrow-bezel mobile phones, it provides dual protection through tooling and product structure, overcoming the limitations of existing technologies that rely on the precision of the mold itself. Utility Model Content
[0005] In view of the problems existing in the prior art, the purpose of this utility model is to provide a glass fiber mold inner mold forming component for mobile phone mid-frame.
[0006] A glass fiber mold inner mold forming component for a mobile phone mid-frame, characterized in that it comprises:
[0007] The inner mold of the mobile phone mid-frame is made of glass fiber. The inner mold of the mobile phone mid-frame is made of glass fiber. The glass fiber semi-cured sheet is disposed inside the frame of the aluminum alloy mid-frame.
[0008] The aluminum alloy frame has adhesive grooves on its surface, which are located on the narrow sides on the left and right sides.
[0009] The fiberglass prepreg is made of multiple layers of fiberglass prepreg, and each layer of fiberglass prepreg has positioning holes.
[0010] The forming fixture includes a stacking fixture and a middle frame shape limiting frame;
[0011] The aforementioned stacking fixture can be used with an aluminum alloy frame.
[0012] The aforementioned middle frame shape limiting frame can be matched with the aluminum alloy middle frame.
[0013] Preferably, the stacking fixture is a flat plate structure, with a limiting post on the top that matches the outer contour of the aluminum alloy frame, and a positioning post corresponding to the position of the positioning hole.
[0014] Through the above technical solution, the stacking fixture can achieve combined positioning of the aluminum alloy frame and multiple layers of fiberglass prepreg. In specific operation, the aluminum alloy frame is placed on the fixture surface and constrained along its outer contour by limiting posts, effectively preventing the frame from moving during subsequent stacking. Then, each layer of fiberglass prepreg is precisely fitted onto the corresponding positioning post through its positioning holes, ensuring that each prepreg layer is aligned vertically and correctly matches the inner frame area of the frame. This stacking positioning method ensures that the edge shape of the fiberglass prepreg accurately conforms to the inner contour of the aluminum alloy frame.
[0015] Preferably, the inner frame of the middle frame limiting frame is adapted to the outer contour of the aluminum alloy middle frame.
[0016] Through the above technical solution, the outer contour limiting frame of the middle frame provides precise outer contour constraints and positioning benchmarks for the aluminum alloy middle frame during the molding process. The perfect fit between its inner frame and the outer contour of the aluminum alloy middle frame allows for full-area contact limiting after the aluminum alloy middle frame is embedded, effectively suppressing the displacement risk caused by the melting and flow of glass fiber during hot pressing. Simultaneously, this fitting structure, in conjunction with the semi-circular groove design on the inner walls of the four corners of the limiting frame, ensures targeted locking of the rounded corners of the aluminum alloy middle frame, avoiding the accumulation of minute deformations caused by high-temperature expansion. The strict matching of the thickness of the limiting frame with the height of the aluminum alloy middle frame further forms a closed cavity, precisely defining the flow boundary of the glass fiber material, preventing resin overflow, and ensuring the dimensional accuracy of the outer edge of the middle frame.
[0017] Preferably, the height of the limiting post of the stacking tool is greater than the thickness of the aluminum alloy frame.
[0018] Through the above technical solution, the height design of the limiting posts in the stacking fixture effectively ensures the coordinated positioning accuracy of the aluminum alloy frame and the multi-layer fiberglass prepreg. Since the height of the limiting posts is greater than the thickness of the aluminum alloy frame, when the aluminum alloy frame is placed on the fixture surface, its overall height is always lower than the top plane of the limiting posts. This height difference provides crucial operational space for the layer-by-layer stacking of the multi-layer fiberglass prepreg: while the positioning posts are precisely inserted into the positioning holes of a single layer of prepreg, each layer of fiberglass material can completely cover the inner frame area of the aluminum alloy frame, and there is no physical interference between layers from the limiting posts or the frame. Especially when the prepreg is stacked to a height close to the top of the limiting posts, the top layer of fiberglass material can still be completely and flatly laid on the surface of the frame, ensuring that the final fiberglass prepreg has a uniform thickness and its edges are strictly aligned with the inner contour of the frame.
[0019] Preferably, the thickness of the outer limiting frame of the middle frame is adapted to the height of the aluminum alloy middle frame.
[0020] Through the above technical solution, the thickness of the outer limiting frame of the middle frame matches the height of the aluminum alloy middle frame, creating a complete sealed cavity boundary during the molding process. This design ensures that the upper and lower surfaces of the limiting frame are flush with the top and bottom ends of the aluminum alloy middle frame. When the mold is closed and pressure is applied, the vertical end face of the limiting frame and the side wall of the aluminum alloy middle frame together form a continuous and gapless physical barrier. This sealed structure effectively blocks the overflow channels of molten glass fiber resin, forcing the material to fill the inner frame area of the aluminum alloy middle frame evenly under high temperature and pressure, eliminating edge burrs or flash defects.
[0021] Preferably, a stud is embedded in the glass fiber prepreg, the stud passes through the positioning hole, and its two ends extend to the top and bottom of the glass fiber prepreg, respectively, and the bottom of the stud is inserted into the positioning post of the stacking tool.
[0022] Through the above technical solution, the studs construct a precise positioning system that penetrates multiple layers of material during the stacking process. When the positioning pins of the stacking fixture and the bottom of the studs form an interlocking fit, physical constraints force each layer of fiberglass prepreg to maintain absolute concentricity with the studs through its positioning holes. This through-type design simultaneously achieves three functions: First, the rigid guiding characteristics of the studs eliminate interlayer rotation deviations that are easily generated during manual stacking; second, the studs extend to both ends of the top and bottom of the prepreg stack to form an axial skeleton, maintaining the stability of the interlayer structure when the positioning pins are pulled out, ensuring that there is no risk of loosening before the preform is transferred to the molding process; third, the studs and the inner frame of the aluminum alloy frame form a geometric complement, ensuring that the edge of the fiberglass prepreg always maintains a precise gap with the inner wall of the frame. The stacking fixture establishes a positioning reference through the interlocking relationship between the positioning pins and the studs. After the last layer of prepreg is stacked and cured, the entire preform is removed from the fixture as a complete component.
[0023] Preferably, the edge shape of the glass fiber prepreg conforms to the inner contour of the aluminum alloy frame.
[0024] Through the above technical solution, the bonding structure between the edge of the fiberglass prepreg and the inner contour of the aluminum alloy frame is completed in the stacking process, thus establishing the basic shape. Specifically, the positioning post system of the stacking fixture constrains each layer of fiberglass prepreg to a preset position, ensuring that its edge contour maintains a uniform distance from the inner sidewall of the aluminum alloy frame. This geometric relationship is fully solidified into the internal structure of the preform during the stacking stage, forming a self-sustaining boundary seal. When the preformed component is transferred to the molding process, this preform boundary plays a crucial role: under the molding temperature and pressure, the molten resin is strictly confined to flow within the preform gap, ensuring full filling while preventing lateral overflow because the gap size is smaller than the resin overflow threshold.
[0025] Preferably, the inner walls of the four corners of the middle frame outer shape limiting frame are provided with semi-circular positioning grooves.
[0026] Through the above technical solution, the semi-circular positioning groove achieves full-area corner constraint and thermal deformation adaptation for the aluminum alloy frame during the molding process. The arc surface of the groove forms a precise fit with the corner contour of the aluminum alloy frame, generating radial rigidity limiting under the high pressure environment of molding, directly suppressing the tendency of the metal frame to undergo micro-displacement.
[0027] Compared with the prior art, the present invention has the following advantages:
[0028] 1. This utility model utilizes the insertion and engagement of the positioning posts of the stacking fixture with the positioning holes of each layer of fiberglass prepreg, combined with a stud structure penetrating all the positioning holes, to form a three-level positioning system from single-layer alignment to overall locking. This design eliminates the problem of interlayer misalignment in traditional processes, reduces the cumulative error of stacking, significantly improves the stud embedding accuracy and structural strength uniformity, increases the product qualification rate, and solves the functional defects caused by misalignment of composite material frames.
[0029] 2. In this utility model, the adhesive-pull grooves on both narrow sides of the aluminum alloy middle frame form a three-dimensional anchoring cavity, with the groove walls and bottom forming the geometric boundary for resin flow. The inner curved surface of the middle frame's outer limiting frame establishes a continuous contact interface with the outer contour of the aluminum alloy middle frame. Combined with the dimensional matching between the thickness of the limiting frame and the frame height, a closed circumferential wrapping structure is formed. The cavity shape of the adhesive-pull grooves and the wrapping curved surface of the limiting frame are spatially complementary, jointly constructing a mechanical constraint system. Attached Figure Description
[0030] Figure 1 This is a schematic diagram of the inner mold of the glass fiber mold for the mobile phone mid-frame of this utility model;
[0031] Figure 2 This is a schematic diagram of the stacking tooling of this utility model;
[0032] Figure 3 This is a schematic diagram of the fit between the inner mold of the glass fiber mold for the mobile phone frame and the stacking tooling of this utility model;
[0033] Figure 4 This is a schematic diagram of the inner mold of the fiberglass mold for the mobile phone frame and the outer shape limiting frame of the mobile phone frame according to this utility model.
[0034] In the diagram: 101, aluminum alloy frame; 102, fiberglass prepreg; 103, adhesive groove; 104, positioning hole; 105, stud; 201, stacking fixture; 202, limiting post; 203, positioning post; 301, frame outer limiting frame; 302, semi-circular positioning groove. Detailed Implementation
[0035] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.
[0036] Please see Figures 1 to 4 This utility model provides a technical solution:
[0037] A glass fiber mold inner mold forming component for a mobile phone mid-frame, characterized in that it comprises:
[0038] The inner mold of the mobile phone mid-frame glass fiber mold includes an aluminum alloy mid-frame 101 and a glass fiber semi-cured sheet 102, with the glass fiber semi-cured sheet 102 disposed inside the aluminum alloy mid-frame 101.
[0039] The aluminum alloy frame 101 has adhesive grooves 103 on its surface, which are located on the narrow sides on the left and right sides.
[0040] The fiberglass prepreg 102 is made of multiple layers of fiberglass prepreg, and each layer of fiberglass prepreg has a positioning hole 104.
[0041] The forming fixture includes a stacking fixture 201 and a middle frame outer shape limiting frame 301;
[0042] The stacking fixture 201 can be used in conjunction with the aluminum alloy frame 101;
[0043] The aforementioned middle frame outer shape limiting frame 301 can be matched with the aluminum alloy middle frame 101.
[0044] Specifically, the stacking fixture 201 is a flat structure with limiting posts 202 on its top that match the outer contour of the aluminum alloy frame 101, and positioning posts 203 corresponding to the positions of the positioning holes 104. The stacking fixture 201 can realize the combined positioning of the aluminum alloy frame 101 and the multilayer glass fiber prepreg. In specific operation, the aluminum alloy frame 101 is placed on the surface of the fixture and constrained by the limiting posts 202 along its outer contour, effectively preventing the frame from moving during subsequent stacking. Then, each layer of glass fiber prepreg is precisely fitted onto the corresponding positioning post 203 through the positioning holes 104, ensuring that each prepreg layer is aligned vertically and correctly matches the inner frame area of the frame. This stacking positioning method ensures that the edge shape of the glass fiber prepreg 102 can accurately fit the inner contour of the aluminum alloy frame 101.
[0045] The stacking tool 201 is only used in the stacking process to provide a composite preform with accurate positioning and stable shape for the subsequent independent molding process.
[0046] Specifically, the inner frame of the middle frame limiting frame 301 is adapted to the outer contour of the aluminum alloy middle frame 101. During the molding process, the middle frame limiting frame 301 provides precise outer contour constraints and positioning references for the aluminum alloy middle frame 101. The complete adaptation of its inner frame to the outer contour of the aluminum alloy middle frame 101 ensures full-area contact limiting after the aluminum alloy middle frame 101 is embedded, effectively suppressing the displacement risk caused by the melting and flow of glass fiber during hot pressing. Simultaneously, this adapting structure, in conjunction with the semi-circular positioning grooves 302 on the inner walls of the four corners of the limiting frame, ensures targeted locking of the rounded corners of the aluminum alloy middle frame 101, avoiding the accumulation of minor deformations caused by high-temperature expansion. The strict matching of the limiting frame thickness with the height of the aluminum alloy middle frame 101 further forms a closed cavity, precisely defining the flow boundary of the glass fiber material, preventing resin overflow, and ensuring the dimensional accuracy of the outer edge of the middle frame.
[0047] It should be noted that this tooling is only used in the molding stage. After the prepreg is positioned and removed by the stacking tooling 201, the pre-assembled components can be placed into the limiting frame for compression molding.
[0048] Specifically, the height of the limiting post 202 of the stacking fixture 201 is greater than the thickness of the aluminum alloy frame 101. The height design of the limiting post 202 of the stacking fixture 201 effectively ensures the coordinated positioning accuracy of the aluminum alloy frame 101 and the multilayer glass fiber prepreg. Because the height of the limiting post 202 is greater than the thickness of the aluminum alloy frame 101, when the aluminum alloy frame 101 is placed on the surface of the fixture, its overall height is always lower than the top plane of the limiting post 202. This height difference provides key operating space for the layer-by-layer stacking of the multilayer glass fiber prepreg: while the positioning post 203 is accurately inserted into the positioning hole 104 of the single-layer prepreg, each layer of glass fiber material can completely cover the inner frame area of the aluminum alloy frame 101, and there is no physical interference between the layers from the limiting post 202 or the frame. Especially when the prepreg is stacked to a height close to the top of the limiting post 202, the top layer of fiberglass material can still be completely laid flat on the surface of the middle frame, ensuring that the final fiberglass semi-cured sheet 102 has a uniform thickness and its edges are strictly aligned with the inner contour of the middle frame.
[0049] This design avoids the stacking jams or interlayer misalignment caused by insufficient height of traditional tooling, significantly improving the structural consistency of the composite preform and laying a precise dimensional foundation for subsequent independent molding processes.
[0050] Specifically, the thickness of the outer limiting frame 301 is adapted to the height of the aluminum alloy middle frame 101. This matching of the thickness of the outer limiting frame 301 to the height of the aluminum alloy middle frame 101 creates a complete sealed cavity boundary during the molding process. This design ensures that the upper and lower surfaces of the limiting frame are flush with the top and bottom ends of the aluminum alloy middle frame 101. When the mold is closed and pressure is applied, the vertical end face of the limiting frame and the side wall of the aluminum alloy middle frame 101 together form a continuous and gapless physical barrier. This sealed structure effectively blocks the overflow channels of the molten glass fiber resin, forcing the material to fill the inner frame area of the aluminum alloy middle frame 101 uniformly under high temperature and pressure, eliminating edge burrs or flash defects.
[0051] Meanwhile, the geometric sealing of the cavity provides stable and balanced lateral support for the molding process, suppressing the risk of micro-deformation of the aluminum alloy frame 101 under pressure, and ensuring that the height deviation of the composite frame is less than the preset value.
[0052] Specifically, a stud 105 is embedded within the glass fiber prepreg 102. The stud 105 penetrates the positioning hole 104, with its two ends extending to the top and bottom of the glass fiber prepreg 102, respectively. The bottom of the stud 105 is inserted into the positioning post 203 of the stacking fixture 201. The stud 105 constructs a precise positioning system that penetrates multiple layers of material during the stacking process. When the positioning post 203 of the stacking fixture 201 and the bottom of the stud 105 are inserted into each other, physical constraints force each layer of glass fiber prepreg to remain absolutely concentric with the stud 105 through its positioning hole 104. This through-type design simultaneously achieves three functions: First, the rigid guiding characteristics of the stud 105 eliminate interlayer rotation deviations that are easily generated during manual stacking; second, the stud 105 extends to both ends of the top and bottom of the prepreg stack to form an axial skeleton, maintaining the stability of the interlayer structure when the positioning post 203 is pulled out, ensuring that there is no risk of loosening before the preform is transferred to the molding process; third, the stud 105 and the inner frame of the aluminum alloy middle frame 101 form a geometric complement, ensuring that the edge of the glass fiber prepreg 102 always maintains a precise gap with the inner wall of the middle frame. The stacking fixture 201 establishes a positioning reference through the insertion relationship between the positioning post 203 and the stud 105. After the last layer of prepreg is stacked and cured and positioned, the entire preform is removed from the fixture as a complete component.
[0053] In the subsequent molding process, the outer shape limiting frame 301 of the middle frame only constrains the outer contour and corner area of the aluminum alloy middle frame 101. Its structural design completely avoids the glass fiber prepreg 102 and the internal studs 105. The two sets of tooling are physically isolated to achieve time-sharing independent operation, fundamentally eliminating dimensional deviations caused by process interference.
[0054] Specifically, the edge shape of the fiberglass prepreg 102 fits the inner contour of the aluminum alloy frame 101. This fit between the edge of the fiberglass prepreg 102 and the inner contour of the aluminum alloy frame 101 completes the basic morphological construction during the stacking process. In operation, the positioning post 203 system of the stacking fixture 201 constrains each layer of fiberglass prepreg to a preset position, ensuring that its edge contour maintains a uniform distance from the inner wall of the aluminum alloy frame 101. This geometric relationship is fully solidified into the internal structure of the preform during the stacking stage, forming a self-sustaining boundary seal. When the preformed component is transferred to the molding process, this preform boundary plays a crucial role: under molding temperature and pressure, the molten resin is strictly confined to flow within the preform gap, ensuring full filling while preventing lateral overflow because the gap size is smaller than the resin overflow threshold.
[0055] All operations strictly adhere to the tooling time-sharing principle. Once the stacking tooling 201 completes edge positioning, it is removed from the production line. Subsequent molding processes are independently performed by the outer frame limiting frame 301, which independently constrains the aluminum alloy frame 101. It has no ability to interfere with the internal boundaries of the fiberglass prepreg 102, only maintaining the stability of the existing geometric relationship. This division of labor ensures zero-loss continuity of the prefabricated form during cross-process transfer.
[0056] Specifically, the inner walls of the four corners of the outer limiting frame 301 are provided with semi-circular positioning grooves 302. These semi-circular positioning grooves 302 provide full-area corner constraint and thermal deformation adaptation for the aluminum alloy inner frame 101 during the molding process. The arc surface of the groove forms a precise fit with the corner contour of the aluminum alloy inner frame 101, generating radial rigidity under the high pressure of molding, directly suppressing the tendency of the metal frame to undergo micro-displacement.
[0057] The curved contact synchronously guides the orderly release of thermal expansion of the aluminum alloy frame 101 along the normal direction, and the arc geometry further redistributes the concentrated load into uniform surface pressure, eliminating the risk of plastic deformation caused by corner stress peaks.
[0058] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.
[0059] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.
[0060] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.
Claims
1. A glass fiber mold inner mold forming component for a mobile phone mid-frame, characterized in that: Includes a fiberglass mold for the mobile phone mid-frame and a molding fixture used in conjunction with the fiberglass mold for the mobile phone mid-frame; The inner mold of the mobile phone frame glass fiber mold includes an aluminum alloy frame (101) and a glass fiber prepreg (102), with the glass fiber prepreg (102) disposed inside the frame of the aluminum alloy frame (101); The aluminum alloy frame (101) is provided with a glue-pulling groove (103), which is provided on the narrow sides on both sides; The fiberglass prepreg (102) is made of multiple layers of fiberglass prepreg, and each layer of fiberglass prepreg has a positioning hole (104). The forming fixture includes a stacking fixture (201) and a middle frame outer shape limiting frame (301); The stacking fixture (201) is a flat plate structure. Its top is provided with a limiting post (202) whose outer contour is adapted to the aluminum alloy frame (101), and a positioning post (203) corresponding to the position of the positioning hole (104). The inner frame of the aforementioned middle frame outer shape limiting frame (301) is adapted to the outer contour of the aluminum alloy middle frame (101); The stacking fixture (201) can be used in conjunction with the aluminum alloy frame (101); The aforementioned middle frame outer shape limiting frame (301) can be matched with the aluminum alloy middle frame (101).
2. The glass fiber mold inner mold forming assembly for a mobile phone mid-frame according to claim 1, characterized in that: The height of the limiting post (202) of the stacking tool (201) is greater than the thickness of the aluminum alloy frame (101).
3. The glass fiber mold inner mold forming assembly for a mobile phone mid-frame according to claim 1, characterized in that: The thickness of the outer limiting frame (301) is adapted to the height of the aluminum alloy middle frame (101).
4. The glass fiber mold inner mold forming assembly for a mobile phone mid-frame according to claim 1, characterized in that: A stud (105) is embedded in the glass fiber prepreg (102). The stud (105) passes through the positioning hole (104) and its two ends extend to the top and bottom of the glass fiber prepreg (102) respectively. The bottom of the stud (105) is inserted into the positioning post (203) of the stacking tool (201).
5. The glass fiber mold inner mold forming assembly for a mobile phone mid-frame according to claim 1, characterized in that: The edge shape of the glass fiber prepreg (102) fits the inner contour of the aluminum alloy frame (101).
6. The glass fiber mold inner mold forming assembly for a mobile phone mid-frame according to claim 1, characterized in that: The inner walls of the four corners of the outer limiting frame (301) of the middle frame are provided with semi-circular positioning grooves (302).