Forming die for middle frame of mobile phone

Abstract

The invention discloses a forming mold for a middle frame of a mobile phone, the forming mold comprises a lower mold plate, an upper mold plate and an outer frame, and the surface of the lower mold plate is provided with a lower accommodating cavity corresponding to the outer frame; an upper accommodating cavity corresponding to the outer frame is formed in the bottom surface of the upper template; the outer frame is provided with a mold cavity for containing a mobile phone middle frame, the outer frame is detachably arranged in a lower containing cavity in the lower mold plate, when the mold cavity is defined by the upper mold plate and the outer frame in a mold closing mode through the upper containing cavity, the upper mold plate abuts against the outer frame, and the top of the mold cavity and the upper mold cavity face of the bottom face of the upper mold plate are in an overlapped state. By the adoption of the forming mold, the integrated mobile phone middle frame with the cavity can be obtained through one-time mold closing operation, later machining and manufacturing are facilitated, the overall structure is simple, manufacturing and machining are convenient, the production efficiency is greatly improved, the quality of the hot-pressed mobile phone middle frame is stable, the market requirement can be met, and the forming mold is suitable for application and popularization.

Description

Technical Field

[0001] The present invention relates to the technical field of mobile phone middle frames, and in particular to a molding die for mobile phone middle frames. Background Art

[0002] With the continuous progress and development of science and technology, people have higher and higher requirements for mobile phones and other electronic products. They are not just electronic devices for communication purposes, but multimedia mobile phones that integrate music, video, photography, Internet access and other functions. With the continuous development of the mobile phone industry, mobile phone performance is becoming more and more powerful, especially the resolution and size of processors and screens are constantly improving. As smartphones gradually move towards larger screens, thinner and more multifunctional, the mainstream screen size continues to grow, and larger screens require stronger mobile phone frames to support them.

[0003] The beauty of the mobile phone middle frame largely determines the consumer's desire to buy. Due to the advantages of metal such as high strength, good texture and good heat dissipation, traditional plastic mobile phones have been gradually replaced by metal mobile phones. Since the mobile phone middle frame is the skeleton of the mobile phone and is used to support the entire mobile phone, the mobile phone middle frame, as an important component for connecting the middle plate and the back cover, has also been gradually metallized. The metallized middle frame not only has a beautiful appearance, but also has the characteristics of wear resistance, drop resistance and corrosion resistance. The existing metal middle frame mainly adopts a manufacturing process combining forging and die-casting, that is, the outer frame of the middle frame is first formed by forging or die-casting, and then produced by CNC processing. With the existing manufacturing method, first, in the early overall forging and die-casting process, if there are loose sand holes, it will not only affect the appearance of the product, but also affect the product quality. Second, in the later CNC processing process, due to the large number of holes to be processed, the processing cost increases, the production efficiency is low, and it cannot meet market demand.

[0004] After searching, the patent document with the authorization announcement number CN206215887U discloses a die-casting mold for forming the middle frame of a mobile phone, the patent document with the authorization announcement number CN219649748U discloses a composite pressing fixture for the middle frame of a mobile phone, and the patent document with the application publication number CN110126203A discloses a forming mold for the blank of the back cover of a mobile phone including the middle frame. It can be seen from the three retrieved patent documents that the forming molds that meet the middle frame of the mobile phone are provided from different angles. Since the existing middle frames of mobile phones are generally made of different metal panels, in order to realize the hot pressing forming of the composite panels, it can solve the contradiction between manufacturing cost and product quality, thereby providing a forming mold different from the prior art. Summary of the invention

[0005] In view of the deficiencies in the prior art, a molding mold which is easy to operate is provided. By using the molding mold, an integral structure can be formed into an integrated mobile phone middle frame with a cavity by one-time hot pressing, which is convenient for later processing and manufacturing, thereby effectively resolving the contradiction between the manufacturing cost and product quality of the existing mobile phone middle frame. Specifically, the molding mold is provided for the mobile phone middle frame.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a molding mold for a mobile phone middle frame, the molding mold includes a lower template, an upper template and an outer frame, the surface of the lower template is provided with a lower accommodating cavity corresponding to the outer frame along its circumferential direction, and the surface of the lower template on the inner side of the lower accommodating cavity is also prefabricated with a lower cavity surface for molding the mobile phone middle frame; and the bottom surface of the upper template is provided with an upper accommodating cavity corresponding to the outer frame along its circumferential direction, and the bottom surface of the upper template on the inner side of the upper accommodating cavity is also prefabricated with an upper cavity surface for molding the mobile phone middle frame; the outer frame has a mold cavity for accommodating the mobile phone middle frame, and the outer frame is detachably arranged in the lower accommodating cavity in the lower template, and when the upper template is molded with the outer frame through the upper accommodating cavity to enclose the mold cavity, the upper template is pressed against the outer frame, and the top of the mold cavity and the upper cavity surface of the bottom surface of the upper template are in an overlapping state.

[0007] Furthermore, a molding mold for a mobile phone middle frame described in the present invention is used, and the molding mold also includes an inner frame, the outer shape structure of the inner frame matches the mold cavity in the outer frame, and the inner frame is detachably arranged in the mold cavity in the outer frame and is in contact with the inner wall surface of the outer frame.

[0008] Furthermore, a molding die for a mobile phone middle frame described in the present invention is used, and the outer frame is composed of four templates connected end to end to form a frame structure with a mold cavity, and the four templates are template one, template two, template three and template four, respectively, and template one and template three are arranged in parallel in the lower accommodating cavity on both sides of the long side direction of the lower template, and template two and template four are arranged in parallel in the lower accommodating cavity on both ends of the short side direction of the lower template, and the outer frame is interconnected by template one, template two, template three and template four to form a mold cavity that can accommodate the mobile phone middle frame.

[0009] Furthermore, a forming mold for a mobile phone middle frame according to the present invention is adopted, wherein the template includes an upper accommodating portion, a supporting portion and a lower accommodating portion arranged in sequence from top to bottom, and the template forms an integrated structure through the upper accommodating portion, the supporting portion and the lower accommodating portion, and the template is detachably connected to the lower template through the cooperation between the lower accommodating portion and the lower accommodating cavity in the lower template, and is detachably connected to the upper template through the cooperation between the upper accommodating portion and the upper accommodating cavity in the upper template; and a plurality of air guide cavities are further provided on the surface of the upper accommodating portion of the template, and a plurality of air guide cavities are further provided on both sides of the air guide cavities. There are exhaust grooves connected to the air guide cavity, one of which extends outward to the outer side surface of the upper accommodating portion, and the other extends inward to the bottom of the inner side surface of the upper accommodating portion; an inwardly recessed air guide groove is provided on the inner side surface of the support portion, and the air guide groove corresponds to the air guide cavity and is connected through the exhaust groove extending inward; a limiting interface is provided at both ends of template one, template two, template three and template four respectively, and under the action of external force, the four templates one, template two, template three and template four are mutually clamped through the limiting interface to form a mold cavity that can accommodate the middle frame of the mobile phone.

[0010] Furthermore, a molding die for a mobile phone middle frame described in the present invention is adopted, wherein the molding die includes an intermediate template, the intermediate template is detachably arranged between a lower template and an upper template, a first accommodating cavity corresponding to the outer frame is provided on the bottom surface of the intermediate template along its circumference, and a cavity surface consistent with the upper cavity surface in the upper template is prefabricated on the bottom surface of the intermediate template on the inner side of the first accommodating cavity; a second accommodating cavity corresponding to the outer frame is provided on the upper surface of the intermediate template along its circumference, and a cavity surface consistent with the lower cavity surface in the lower template is prefabricated on the surface of the intermediate template on the inner side of the second accommodating cavity; when the intermediate template and the outer frame are molded together to enclose the mold cavity, the bottom of the intermediate template is pressed against the outer frame in the lower template, and when the upper template and the outer frame in the intermediate template are molded together to enclose the mold cavity, the bottom of the upper template is pressed against the outer frame in the intermediate template.

[0011] Furthermore, a molding mold for a mobile phone middle frame described in the present invention is used, and the molding mold also includes a locking block, two of the locking blocks are provided, and a plurality of parallel limit slots are provided in the locking blocks, and the two locking blocks are arranged in parallel at both ends of the lower template, the outer frame, the middle template and the upper template, and are detachably connected to the lower template, the outer frame, the middle template and the upper template through the limit slots.

[0012] Furthermore, a molding die for a mobile phone middle frame described in the present invention is used, wherein the lower template, the upper template and the middle template are all made of high-temperature resistant metal as an integrated rectangular block structure, and a disassembly notch is respectively provided at the corners around the lower template, the upper template and the middle template.

[0013] Compared with the prior art, the forming mold for the mobile phone middle frame described in the present invention has the beneficial effect that: through the configuration of the outer frame and the inner frame, the middle frame to be formed can be placed in the inner frame in the outer frame in advance, and then the upper template and the lower template are molded together and finally placed in the hot pressing equipment. The middle frame product to be prepared can be obtained by hot pressing. At the same time, since a plurality of air guide cavities are provided on the surface of the upper accommodating portion of the template, exhaust grooves communicating with the air guide cavities are provided on both sides of the air guide cavity, the two exhaust grooves are configured, during the hot pressing process, not only is it convenient to exhaust gas, but also excess dust put into the inner frame can be discharged in time, thereby avoiding the problem of sand holes in the hot pressed middle frame product. In addition, since the lower cavity surfaces for molding the mobile phone middle frame are prefabricated in the upper template and the lower template respectively, a one-time hot pressing molding is adopted to form an integral structure, which can effectively solve the problem of CNC processing, and the mobile phone middle frame product can be obtained by simple grinding.

[0014] It can be seen that by adopting the molding mold described in the present invention, an integrated mobile phone middle frame with a cavity can be obtained through a single mold closing operation, which is convenient for later processing and manufacturing, and can effectively solve the contradiction between the manufacturing cost and product quality of the existing mobile phone middle frame. Its overall structure is simple, and it is convenient to manufacture and process, which greatly improves the production efficiency. The quality of the hot-pressed mobile phone middle frame is stable, can meet market demand, and is suitable for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0016] Figure 1 is a schematic diagram of the structure of the molding die after mold closing according to Embodiment 1 of the present invention; Figure 2 It is a structural schematic diagram of the lower template described in the present invention; Figure 3 It is a structural schematic diagram of the upper template described in the present invention; Figure 4 It is a structural schematic diagram of the outer frame described in the present invention; Figure 5 It is a schematic diagram of the structure of the template 1 and the template 3 described in the present invention; Figure 6 It is a schematic diagram of the structure of the template 2 and the template 4 in the present invention; Figure 7 is a schematic structural diagram of the molding die before mold closing according to Embodiment 1 of the present invention; Figure 8 It is a structural schematic diagram of the inner frame described in the present invention; Fig. 9 The structure of the intermediate template in the present invention is shown in FIG. Figure 1 ; Fig.10The structure of the intermediate template in the present invention is shown in FIG. Figure 2 ; Fig.11 is a schematic diagram of the structure of the molding die after mold closing according to Embodiment 2 of the present invention; Fig.12 It is a structural schematic diagram of the locking block described in the present invention; Fig.13 It is a schematic diagram of the structure of the molding mold after mold closing described in Example 3 of the present invention.

[0017] As shown in the figure: 1-lower template, 11-lower accommodating cavity, 2-upper template, 21-upper accommodating cavity, 3-outer frame, 31-template one, 32-template two, 33-template three, 34-template four, 35-air guide cavity, 36-exhaust groove, 37-air guide groove, 38-limiting interface, 4-inner frame, 5-middle template, 51-first accommodating cavity, 52-second accommodating cavity, 6-locking block, 61-limiting slot. DETAILED DESCRIPTION

[0018] The following is a description of the implementation of the present invention by means of specific embodiments. Those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification.

[0019] It should be noted that the structures, proportions, sizes, etc. drawn in the drawings of this specification are only used to match the contents disclosed in the specification for people familiar with this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention, so they have no substantial technical significance. Any modification of the structure, change of the proportion relationship or adjustment of the size, without affecting the effects and purposes that can be achieved by the present invention, should still fall within the scope of the technical content disclosed by the present invention. At the same time, the terms such as "upper", "lower", "left", "right", etc. quoted in this specification are only for the convenience of description, and are not used to limit the scope of the implementation of the present invention. The change or adjustment of their relative relationship should also be regarded as the scope of the implementation of the present invention without substantially changing the technical content.

[0020] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "provided with" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0021] It should be noted that the term "comprise" or any other variation is intended to cover non-exclusive inclusion, so that a process, method, article or apparatus that includes a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or apparatus. Example 1

[0022] like Figures 1 to 8 As shown, the present embodiment provides a molding mold for a mobile phone middle frame, the molding mold comprises a lower template 1, an upper template 2 and an outer frame 3, a lower accommodating cavity 11 corresponding to the outer frame 3 is provided on the surface of the lower template 1 along its circumferential direction, and a lower cavity surface for molding the mobile phone middle frame is prefabricated on the surface of the lower template 1 inside the lower accommodating cavity 11; and an upper accommodating cavity 21 corresponding to the outer frame 3 is provided on the bottom surface of the upper template 2 along its circumferential direction, and an upper cavity surface for molding the mobile phone middle frame is prefabricated on the bottom surface of the upper template 2 inside the upper accommodating cavity 21; the outer frame 3 has a mold cavity for accommodating the mobile phone middle frame, the outer frame 3 is detachably arranged in the lower accommodating cavity 11 in the lower template 1, and when the upper template 2 is molded with the outer frame 3 through the upper accommodating cavity 21 to enclose the mold cavity, the upper template 2 is pressed against the outer frame 3, and the top of the mold cavity and the upper cavity surface of the bottom surface of the upper template 2 are in an overlapping state. Among them, the lower template 1 and the upper template 2 are made of high-temperature resistant metal as an integrated rectangular block structure. At the same time, in order to facilitate the disassembly of the upper template 1 and the upper template 2, a disassembly notch is provided at the corners around the lower template 1, the upper template 2 and the middle template 5.

[0023] Furthermore, a forming mold for a mobile phone middle frame described in this embodiment is adopted, the outer frame 3 is composed of four templates connected end to end to form a frame structure with a mold cavity, the four templates are template one 31, template two 32, template three 33 and template four 34, the template one 31 and template three 33 are arranged in parallel in the lower accommodating cavity 11 on both sides of the long side direction of the lower template 1, and the template two 32 and template four 34 are arranged in parallel in the lower accommodating cavity 11 on both ends of the short side direction of the lower template 1, the outer frame 3 is connected to each other by template one 31, template two 32, template three 33 and template four 34 to form a mold cavity capable of accommodating the mobile phone middle frame; wherein the template includes an upper accommodating portion, a supporting portion and a lower accommodating portion arranged in sequence from top to bottom, the template is formed into an integral structure by the upper accommodating portion, the supporting portion and the lower accommodating portion, and the template cooperates with the lower accommodating cavity 11 in the lower template 1 through the lower accommodating portion. The lower template 1 is detachably connected and is detachably connected to the upper template 2 through the cooperation between the upper accommodating portion and the upper accommodating cavity 21 in the upper template 2; and a plurality of air guide cavities 35 are also provided on the surface of the upper accommodating portion of the template, and exhaust grooves 36 communicating with the air guide cavities 35 are also provided on both sides of the air guide cavities 35, one of the exhaust grooves 36 extends outward to the outer side surface of the upper accommodating portion, and the other exhaust groove 36 extends inward to the bottom of the inner side surface of the upper accommodating portion; an inwardly recessed air guide groove 37 is provided on the inner side surface of the support portion, and the air guide groove 37 corresponds to the air guide cavity 35 and communicates with the exhaust groove 36 extending inwardly; a limit interface 38 is provided at the two ends of the template one 31, template two 32, template three 33 and template four 34 respectively, and the four templates one 31, template two 32, template three 33 and template four 34 are mutually clamped through the limit interface 38 under the action of external force to form a mold cavity that can accommodate the middle frame of the mobile phone.

[0024] Furthermore, a molding mold for a mobile phone middle frame as described in this embodiment is used, and the molding mold also includes an inner frame 4, and the outer shape structure of the inner frame 4 matches the mold cavity in the outer frame 3. The inner frame 4 can be detachably arranged in the mold cavity in the outer frame 3, and is in contact with the inner wall surface of the outer frame 3. Example 2

[0025] like Figures 9 to 11As shown, this embodiment is based on the embodiment 1, in order to form multiple mobile phone middle frames at one time, improve processing efficiency, and reduce processing costs, the molding mold described in this embodiment is adopted, and the molding mold includes an intermediate template 5, and the intermediate template 5 is made of high-temperature resistant metal as an integrated rectangular block structure. The intermediate template 5 is detachably arranged between the lower template 1 and the upper template 2, and a first accommodating cavity 51 corresponding to the outer frame 3 is provided on the bottom surface of the intermediate template 5 along its circumference, and a first accommodating cavity 51 corresponding to the outer frame 3 is also prefabricated on the bottom surface of the intermediate template 5 inside the first accommodating cavity 51. A cavity surface is consistent with the upper cavity surface in the plate 2; and a second accommodating cavity 52 corresponding to the outer frame 3 is provided on the upper surface of the intermediate template 5 along its circumference, and a cavity surface consistent with the lower cavity surface in the lower template 1 is prefabricated on the surface of the intermediate template 5 inside the second accommodating cavity 52; when the intermediate template 5 and the outer frame 3 are molded together to enclose the cavity, the bottom of the intermediate template 5 is pressed against the outer frame 3 in the lower template 1, and when the upper template 2 and the outer frame 3 in the intermediate template 5 are molded together to enclose the cavity, the bottom of the upper template 2 is pressed against the outer frame 3 in the intermediate template 5.

[0026] Furthermore, the forming mold described in this embodiment is used, and in order to facilitate the disassembly of the middle template 5, a disassembly notch is provided at the four corners of the middle template 5.

[0027] By configuring the intermediate template 5, multiple intermediate templates 5 can be configured between the lower template 1 and the upper template 2, and the multiple intermediate templates 5 can be placed between the upper templates 2 in an overlapping manner. Through one-time hot pressing molding, multiple mobile phone middle frames can be obtained, which can reduce processing costs and improve processing efficiency. Example 3

[0028] like Figure 12 to Figure 13 As shown, this embodiment is based on the embodiment 2. In order to facilitate the fixation of multiple overlapping intermediate templates 5 and the lower template 1 and the upper template 2, and to facilitate the placement of them in the hot pressing equipment for hot pressing treatment, the molding mold described in this embodiment is adopted. The molding mold also includes a locking block 6, and the locking block 6 is provided with two, and a plurality of parallel limit slots 61 are provided in the locking block 6. The two locking blocks 6 are arranged in parallel at the two ends of the lower template 1, the outer frame 3, the intermediate template 5 and the upper template 2, and are detachably connected to the lower template 1, the outer frame 3, the intermediate template 5 and the upper template 2 through the limit slots 61.

[0029] By configuring the locking block 6, the molding die after molding can be locked by the locking block 6, so that it is convenient to put it into the hot pressing equipment for hot pressing treatment.

[0030] By using the molding mold described in the present invention, in a specific application process, the substrate layer used for the mobile phone middle frame can be selected in advance, and the corresponding thermal conductive powder material can be prepared. Then, the substrate layer and the powder material are placed in the inner frame 4 according to the design requirements, and then the upper template 2 and the lower template 1 are molded together, and finally placed in a hot pressing device. Through hot pressing molding, the middle frame product to be prepared can be obtained, and the specific hot pressing process can be processed according to the existing hot pressing molding process. Since a plurality of air guide cavities 35 are provided on the surface of the upper accommodation portion of the template, exhaust grooves 36 communicating with the air guide cavities 35 are provided on both sides of the air guide cavities 35, and an inwardly recessed air guide groove 37 is provided on the inner side surface of the support portion, the air guide groove 37 corresponds to the air guide cavity 35, and is communicated with through the exhaust groove 36 extending inwardly, through the two exhaust grooves 36 and the air guide groove 37, during the hot pressing process, not only is it convenient to discharge gas, but also the excess thermal conductive powder material put into the inner frame 4 can be discharged in time, thereby avoiding the occurrence of sand holes and other problems in the hot pressing formed middle frame product; in addition, since the lower cavity surface and the upper cavity surface of the molded mobile phone middle frame are prefabricated in the upper template 2 and the lower template 1 respectively, a single hot pressing molding can be adopted to obtain a structural member with a cavity as an integral structure, thus solving the problem of processing by CNC process, and only simple grinding processing is required for the hot pressing formed structural member to obtain the mobile phone middle frame product.

[0031] To sum up, by adopting the molding mold described in the present invention, an integrated mobile phone middle frame with a cavity can be obtained through a one-time mold closing operation, which is convenient for later processing and production, and can effectively solve the contradiction between the manufacturing cost and product quality of the existing mobile phone middle frame. Its overall structure is simple, and it is convenient to make and process, which greatly improves the production efficiency. The quality of the hot-pressed mobile phone middle frame is stable, can meet market demand, and is suitable for promotion and application.

[0032] Other aspects of the present invention that are not described in detail are all conventional techniques known to those skilled in the art.

[0033] The protection scope of the present invention is not limited to the technical solutions disclosed in the specific implementation methods. The above description is only a preferred implementation method of the present invention and does not limit the present invention. Any minor modifications, equivalent substitutions and improvements made according to the technical solutions of the present invention should be included in the protection scope of the technical solutions of the present invention.

Claims

1. A molding die for a mobile phone middle frame, characterized in that: The molding die comprises a lower mold plate (1), an upper mold plate (2) and an outer frame (3); a lower accommodating cavity (11) corresponding to the outer frame (3) is provided on the surface of the lower mold plate (1) along its circumference, and a lower mold cavity surface for molding a mobile phone middle frame is also prefabricated on the surface of the lower mold plate (1) inside the lower accommodating cavity (11); and an upper accommodating cavity (21) corresponding to the outer frame (3) is provided on the bottom surface of the upper mold plate (2) along its circumference, and a lower mold cavity surface for molding a mobile phone middle frame is prefabricated on the surface of the lower mold plate (1) inside the lower accommodating cavity (11). The bottom surface of the inner upper template (2) is also prefabricated with an upper cavity surface for molding the middle frame of the mobile phone; the outer frame (3) has a cavity for accommodating the middle frame of the mobile phone, and the outer frame (3) is detachably arranged in the lower accommodating cavity (11) in the lower template (1). When the upper template (2) and the outer frame (3) are molded together through the upper accommodating cavity (21) to enclose the cavity, the upper template (2) is pressed against the outer frame (3), and the top of the cavity and the upper cavity surface of the bottom surface of the upper template (2) are in an overlapping state.

2. A molding die for a mobile phone middle frame according to claim 1, characterized in that: The molding die also includes an inner frame (4), the outer shape structure of the inner frame (4) matches the mold cavity in the outer frame (3), the inner frame (4) is detachably arranged in the mold cavity in the outer frame (3), and is in close contact with the inner wall surface of the outer frame (3).

3. A molding die for a mobile phone middle frame according to claim 2, characterized in that: The outer frame (3) is composed of four templates connected end to end to form a frame structure with a mold cavity. The four templates are template one (31), template two (32), template three (33) and template four (34). Template one (31) and template three (33) are arranged in a parallel state in the lower accommodating cavity (11) on both sides of the long side direction of the lower template (1), and template two (32) and template four (34) are arranged in a parallel state in the lower accommodating cavity (11) on both ends of the short side direction of the lower template (1). The outer frame (3) is connected to each other by template one (31), template two (32), template three (33) and template four (34) to form a mold cavity capable of accommodating the mobile phone middle frame.

4. The molding die for a mobile phone middle frame according to claim 3, characterized in that: The template comprises an upper accommodating portion, a supporting portion and a lower accommodating portion which are arranged in sequence from top to bottom. The template is formed into an integral structure by the upper accommodating portion, the supporting portion and the lower accommodating portion. The template is detachably connected to the lower template (1) by the cooperation of the lower accommodating portion with the lower accommodating cavity (11) in the lower template (1), and is detachably connected to the upper template (2) by the cooperation of the upper accommodating portion with the upper accommodating cavity (21) in the upper template (2). A plurality of air guide cavities (35) are also provided on the surface of the upper accommodating portion of the template, and exhaust grooves (36) which are in communication with the air guide cavity (35) are also provided on both sides of the air guide cavity (35), wherein one exhaust groove (36) extends outward. To the outer side surface of the upper accommodating portion, and another exhaust groove (36) extends inwardly to the bottom of the inner side surface of the upper accommodating portion; an inwardly recessed air guide groove (37) is provided on the inner side surface of the supporting portion, and the air guide groove (37) corresponds to the air guide cavity (35) and communicates with each other through the exhaust groove (36) extending inwardly; a limit interface (38) is provided at both ends of the template one (31), template two (32), template three (33) and template four (34), respectively, and the four templates one (31), template two (32), template three (33) and template four (34) are mutually clamped through the limit interface (38) under the action of external force to form a mold cavity capable of accommodating the middle frame of the mobile phone.

5. A molding die for a mobile phone middle frame according to any one of claims 1 to 4, characterized in that: The molding die comprises an intermediate template (5), the intermediate template (5) being detachably arranged between a lower template (1) and an upper template (2), a first accommodating cavity (51) corresponding to the outer frame (3) being provided on the bottom surface of the intermediate template (5) along its circumference, and a cavity surface consistent with an upper cavity surface in the upper template (2) being prefabricated on the bottom surface of the intermediate template (5) inside the first accommodating cavity (51); and a second cavity surface corresponding to the outer frame (3) being provided on the upper surface of the intermediate template (5) along its circumference. The second accommodating cavity (52) is provided with a cavity surface which is consistent with the lower cavity surface in the lower template (1) prefabricated on the surface of the intermediate template (5) inside the second accommodating cavity (52); when the intermediate template (5) and the outer frame (3) are molded together to form the cavity, the bottom of the intermediate template (5) is pressed against the outer frame (3) in the lower template (1); and when the upper template (2) and the outer frame (3) in the intermediate template (5) are molded together to form the cavity, the bottom of the upper template (2) is pressed against the outer frame (3) in the intermediate template (5).

6. A molding die for a mobile phone middle frame according to claim 5, characterized in that: The molding die further comprises a locking block (6), wherein two locking blocks (6) are provided, and a plurality of parallel limit slots (61) are provided in the locking blocks (6). The two locking blocks (6) are arranged in parallel at the two ends of the lower template (1), the outer frame (3), the middle template (5) and the upper template (2), and are detachably connected to the lower template (1), the outer frame (3), the middle template (5) and the upper template (2) via the limit slots (61).

7. A molding die for a mobile phone middle frame according to claim 6, characterized in that: The lower template (1), the upper template (2) and the middle template (5) are all made of high temperature resistant metal to form an integrated rectangular block structure, and a disassembly notch is provided at the corners around the lower template (1), the upper template (2) and the middle template (5).

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