Injection mold for molding plastic product mobile phone shell

Abstract

The invention discloses an injection mold for molding a plastic product mobile phone shell, which comprises an arranged fixed mold, the fixed mold is connected with a movable mold through a guide structure, the interior of the fixed mold is connected with a mobile phone shell bottom mold seat through a limiting assembly, and the interior of the movable mold is connected with a mobile phone shell internal mold seat through a limiting assembly. Inclined rods are arranged at the bottom of the mobile phone shell bottom mold base and the bottom of the mobile phone shell inner mold base correspondingly, and inclined grooves matched with the inclined rods are formed in the movable blocks. According to the injection mold for molding the plastic product mobile phone shell, when a mobile phone shell bottom mold base and a mobile phone shell internal mold base are mounted, inclined rods on the mobile phone shell bottom mold base and the mobile phone shell internal mold base are embedded into inclined grooves of corresponding moving blocks, so that the mounting precision and firmness of the mobile phone shell bottom mold base and the mobile phone shell internal mold base are improved; and overall mounting and dismounting are rapid and convenient, the mold base can be conveniently and rapidly replaced according to the needed mobile phone shell, and the overall practicability is improved.

Description

Technical Field

[0001] This invention relates to the technical field of plastic product manufacturing, specifically to an injection mold for molding mobile phone casings. Background Technology

[0002] The molding of mobile phone cases relies on precisely designed injection molds to ensure the high precision and stability of the product. The lower and upper mold cores of the mold are located at both ends, accurately shaping the inner and outer contours of the mobile phone case. During the injection molding process, molten plastic material enters the mold through the flow channel system and is evenly filled into the entire mold cavity under high temperature and high pressure. To reduce production costs, the mold design adopts the recycling and reuse of waste materials, which not only optimizes the efficiency of resource use but also effectively reduces the waste of raw materials.

[0003] Existing technology 1 (Chinese patent publication number CN217258010U, publication date August 23, 2022) discloses a high-precision mobile phone case injection mold. This mold, from top to bottom, comprises an upper mold fixing plate, a stripper plate, an upper template device, a shell mold, and a lower template device. The upper and lower template devices are correspondingly arranged, forming an injection cavity between them. The shell mold core and camera cover are disposed within the injection cavity. A positioning groove is provided on the camera frame of the shell mold core. The camera cover is positioned at the corresponding position on the camera frame of the shell mold core, and a positioning block matching the positioning groove is provided on the camera cover. The camera cover and the shell mold core are quickly positioned through the positioning groove and the positioning block. Simultaneously, the positioning block, locked within the positioning groove, also serves a fixing function, improving installation efficiency. Furthermore, when it is necessary to injection mold a phone case of the same size and model with a different single camera position, only the camera cover needs to be replaced, which greatly reduces costs and improves work efficiency. Existing technology two (Chinese patent publication number CN221851003U, publication date October 18, 2024) discloses a phone case injection mold and a phone case molding device. The phone case injection mold includes a base, a support column, a rear template, a front template, a runner template, and a top template. The support column is connected to the base and is used to support and connect the rear template. The front template, the runner template, and the top template... The plates are arranged sequentially from bottom to top on the rear template. The rear template has a lower mold core, and the front template has an upper mold core. The lower mold core has a first side core, a second side core, a third side core, and a fourth side core arranged around its perimeter, respectively forming the first side, the second side, the third side, and the fourth side. Each of the four side cores has a first recess on the side closest to the lower mold core to form the convex strip. The second side core has a power button concave mold, the third side has a convex mold, and the fourth side has a volume button concave mold.

[0004] Existing technologies use single molds that are inconvenient to replace. The method of adjusting the position of the camera cover and the housing mold core by using a snap-fit ​​structure may cause the positioning groove and positioning block to wear after long-term use, which may cause the injection molding material to flow into the gap, thus affecting the molding quality of the product. In addition, the installation and removal of the positioning block requires a certain amount of operation time, which increases the complexity of the operation.

[0005] To address the aforementioned issues, there is an urgent need for innovative design based on existing injection molds for molding plastic mobile phone casings. Therefore, we propose that injection molds for molding plastic mobile phone casings can effectively solve these problems. Summary of the Invention

[0006] The purpose of this invention is to provide an injection mold for molding mobile phone casings made of plastic products, in order to solve the problems mentioned in the background art. Currently, the molds on the market are simple and inconvenient to change. Furthermore, the method of adjusting the position of the camera cover and the outer shell mold core by means of a snap-fit ​​structure may cause the positioning groove and positioning block to wear after long-term use, which may cause the injection material to flow into the gap, thereby affecting the molding quality of the product. In addition, the installation and removal of the positioning block requires a certain amount of operation time, which increases the complexity of the operation.

[0007] To achieve the above objectives, the present invention provides the following technical solution: an injection mold for molding a plastic mobile phone casing, comprising a fixed mold, a movable mold connected to the fixed mold via a guide structure, a bottom mold base for the mobile phone casing connected inside the fixed mold via a limiting component, an inner mold base for the mobile phone casing connected inside the movable mold via a limiting component, an injection pipe connecting the movable mold to the inner mold base for the mobile phone casing, a cooling pipe provided inside the bottom mold base for the mobile phone casing, and inclined rods provided at the bottom of both the bottom mold base and the inner mold base for the mobile phone casing. Both the mold base and the inner mold base of the phone case have snap-fit ​​grooves on their sides. The limiting component includes a movable block installed inside the fixed mold or the moving mold. The movable block has an inclined groove adapted to the inclined rod. A movable rod is provided on the side of the movable block. The movable rod is sleeved inside the first sleeve. The first sleeve is located inside the fixed mold or the moving mold. The bottom of the inclined groove is connected to the inner cavity of the first sleeve through a conveying pipe. A telescopic rod is provided inside the fixed mold or the moving mold. A first movable plate is installed on the side of the telescopic rod. A snap-fit ​​rod adapted to the snap-fit ​​groove is provided on the side of the first movable plate.

[0008] Preferably, the first sleeve is connected to the side end of the moving rod by a first spring, and a contact rod is installed on the moving rod. The first sleeve is provided with a first contact ring and a second contact ring. The first contact ring and the second contact ring are connected to the electromagnetic structure by a wire, and the contact rod is electrically connected to the electromagnetic plate by a wire.

[0009] Preferably, the electromagnetic sheet is located inside the fixed mold or the moving mold, a common magnetic block adapted to the electromagnetic sheet is provided on the side end of the first movable plate, a second spring is installed on the outside of the telescopic rod, a pull rod is provided at the end of the movable rod, and the pull rod extends through to the outside of the fixed mold or the moving mold.

[0010] Preferably, the internal mold base of the mobile phone case is provided with a cutting component. The cutting component includes a storage cavity opened inside the internal mold base of the mobile phone case. A cutting blade is connected to the storage cavity through a third spring. The cutting blade is used to cut injection molded scraps.

[0011] Preferably, the side end of the storage cavity is connected to an external air pump through a first air supply pipe, a cleaning nozzle is provided on one side of the fixed mold, and a recycling box for recycling waste is installed on the other side of the fixed mold.

[0012] Preferably, an ejection assembly is installed inside the bottom mold base of the mobile phone case. The ejection assembly includes a drive box installed inside the bottom mold base of the mobile phone case, and a telescopic cylinder is provided inside the drive box. A lifting plate is connected to the telescopic cylinder.

[0013] Preferably, a lifting cylinder is connected to the lifting plate, the upper surface of the lifting cylinder is on the same horizontal plane as the upper surface of the groove of the phone case inside the bottom mold seat of the phone case, and a through hole is opened on the outer side of the lifting cylinder.

[0014] Preferably, a second sleeve is installed on the side of the drive box. The upper surface of the second sleeve is on the same horizontal plane as the upper surface of the groove inside the bottom mold seat of the phone case. A push rod is connected through the inside of the second sleeve. The upper surface of the push rod is on the same horizontal plane as the upper surface of the second sleeve.

[0015] Preferably, a second movable plate is provided below the top rod, and a magnetic attraction structure is provided between the lifting plate and the second movable plate. An air supply box is provided below the second sleeve. The air supply box is connected to an external air pump through a pipe. The air supply box is connected to the inner cavity of the temporary storage cylinder through a second air supply pipe. The inner cavity of the temporary storage cylinder is connected to the inner cavity of the lifting cylinder.

[0016] Compared with the prior art, the beneficial effects of the present invention are as follows: When installing the bottom mold base and the inner mold base of the phone case, the inclined rods on the bottom mold base and the inner mold base are embedded in the inclined grooves of the corresponding moving blocks, improving the accuracy and firmness of the installation of the bottom mold base and the inner mold base. The overall installation and disassembly are quick and convenient, allowing for easy replacement of the mold base according to the required phone case, thus improving the overall practicality. The specific details are as follows: During mold base installation, the embedded cooperation between the tilting rod and the tilting groove forms a stable mechanical transmission. The moving rod drives the first spring to stretch and achieve elastic reset, ensuring the stability of the moving block's movement trajectory. The compressed gas in the tilting groove pushes the telescopic rod through pneumatic assistance, strengthening the connection stability between the moving block and the tilting rod. The overall installation is quick and convenient, improving production efficiency.

[0017] The electromagnetic plate is controlled by the graded contact between the contact rod and the double contact ring. First, the first moving plate is driven to move in advance to improve the continuity of the action. Then, the locking rod is driven to insert into the locking groove through electromagnetic adsorption to complete the limit. The dual limit structure of electromagnetic and mechanical combination can effectively resist injection pressure, avoid cavity misalignment caused by mold displacement, and improve the production quality of mobile phone cases.

[0018] The injection molding raw materials are made from recycled plastics, which directly realizes the recycling of plastic resources, reduces the consumption of virgin plastics, and the scraps generated from cutting are collected into recycling boxes by airflow. After being crushed, they can be reused in production, reducing the pollution of plastic waste to the environment.

[0019] The rational layout of the cooling pipes enables the injection molding material to cool and solidify quickly, greatly shortening the cooling cycle and improving production efficiency. The external air pump drives the cutting blade to precisely cut the scraps. The integrated design eliminates the need for subsequent separate trimming processes, improving the processing integration and cutting accuracy.

[0020] The ejector rod and the lifting cylinder rise synchronously, so that the ejection force is evenly distributed, avoiding excessive pressure at a single ejection point that could cause product deformation. The gas introduced into the inner cavity of the lifting cylinder forms an air film, which effectively separates the product from the cavity, solves the adhesion problem, and improves the product qualification rate. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the fixed mold and moving mold separation structure of the present invention; Figure 3 This is a schematic diagram of the moving mold structure from below in this invention; Figure 4 This is a schematic diagram of the cross-sectional structure of the moving mold of the present invention; Figure 5 This is a schematic diagram of the fixed mold section structure of the present invention; Figure 6 This is a schematic diagram of the cross-sectional structure of the fixed mold and the bottom mold base of the mobile phone case of the present invention; Figure 7 This is a schematic diagram of the connection structure between the first movable plate and the locking rod of the present invention; Figure 8 For the present invention Figure 7 Enlarged structural diagram at point A in the middle; Figure 9 For the present invention Figure 7Enlarged structural diagram at point B; Figure 10 This is a side view of the bottom mold base of the mobile phone case according to the present invention; Figure 11 This is a schematic diagram of the structure after the cutting blade of the present invention has moved; Figure 12 This is a schematic diagram of the bottom mold base and lifting cylinder structure of the mobile phone case of the present invention; Figure 13 This is a schematic diagram of the connection structure between the top rod and the second sleeve of the present invention.

[0022] In the diagram: 1. Fixed mold; 2. Guide structure; 3. Moving mold; 4. Bottom mold base of the phone case; 5. Internal mold base of the phone case; 6. Injection pipe; 7. Cooling pipe; 8. Snap-fit ​​groove; 9. Inclined rod; 10. Moving block; 11. Inclined groove; 12. Conveying pipe; 13. First sleeve; 14. First spring; 15. Moving rod; 16. Contact rod; 17. First contact ring; 18. Second contact ring; 19. Wire; 20. Electromagnetic plate; 21. Telescopic rod; 2 2. First movable plate; 23. Ordinary magnetic block; 24. Second spring; 25. Snap-fit ​​rod; 26. Pull rod; 27. Storage cavity; 28. Third spring; 29. ​​Cutting blade; 30. First air supply pipe; 31. Nozzle; 32. Recycling box; 33. Telescopic cylinder; 34. Lifting plate; 35. Magnetic suction structure; 36. Second movable plate; 37. Top rod; 38. Air supply box; 39. Second sleeve; 40. Second air supply pipe; 41. Temporary storage cylinder; 42. Lifting cylinder. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1: In this example, the injection molding material is injected into the cavity through the injection pipe 6 within the moving mold 3. The injection molding material is plastic processed from recycled plastic, thus realizing the recycling of plastic resources. Figures 1-10The technical solution shown includes a fixed mold 1, a movable mold 3 connected to the fixed mold 1 via a guide structure 2, a bottom mold base 4 for the phone case connected inside the fixed mold 1 via a limiting component, an inner mold base 5 for the phone case connected inside the movable mold 3 via a limiting component, an injection pipe 6 connecting the movable mold 3 to the inner mold base 5 for the phone case, a cooling pipe 7 inside the bottom mold base 4, tilting rods 9 at the bottom of both the bottom mold base 4 and the inner mold base 5, and snap-fit ​​grooves 8 on the sides of both the bottom mold base 4 and the inner mold base 5. The limiting component includes a moving block installed inside the fixed mold 1 or the movable mold 3. 10. The movable block 10 has an inclined groove 11 adapted to the inclined rod 9. A movable rod 15 is provided on the side of the movable block 10. The movable rod 15 is sleeved inside the first sleeve 13. The first sleeve 13 is located inside the fixed mold 1 or the moving mold 3. The bottom of the inclined groove 11 is connected to the inner cavity of the first sleeve 13 through the conveying pipe 12. A telescopic rod 21 is provided inside the fixed mold 1 or the moving mold 3. A first movable plate 22 is installed on the side of the telescopic rod 21. A snap-fit ​​rod 25 adapted to the snap-fit ​​groove 8 is provided on the side of the first movable plate 22. When installing the bottom mold base 4 and the inner mold base 5 of the mobile phone case, the bottom mold base 4 and the inner mold base 5 of the mobile phone case... The tilting rod 9 is embedded in the tilting groove 11 of the corresponding moving block 10, pushing the moving block 10 to move laterally. This causes the moving rod 15 to stretch the first spring 14 inside the first sleeve 13. At this time, the gas in the tilting groove 11 is compressed and transmitted to the inner cavity of the first sleeve 13 through the conveying pipe 12, assisting in pushing the moving rod 15 inside the first sleeve 13 to move. The connection between the moving block 10 and the tilting rod 9 is more stable, effectively improving the accuracy and firmness of the installation of the bottom mold base 4 and the inner mold base 5 of the phone case. The overall installation and disassembly are quick and convenient, making it easy to quickly change the mold base according to the required phone case, thus improving the overall practicality. The moving mold 3 is guided by... Structure 2 moves closer to the fixed mold 1 to close the mold. The bottom mold base 4 of the phone case and the inner mold base 5 of the phone case are precisely connected to form the injection cavity of the phone case. The injection material is injected into the cavity through the injection pipe 6 in the moving mold 3. The injection material is plastic processed from recycled plastic, realizing the recycling of plastic resources, reducing production costs and plastic waste pollution. After injection molding is completed, the cooling medium is introduced into the cooling pipe 7 in the bottom mold base 4 of the phone case to quickly remove the heat inside the cavity, so that the injection material cools and solidifies into the phone case blank. The reasonable layout of the cooling pipe 7 greatly shortens the cooling cycle and improves the overall production efficiency.

[0025] Example 2: In this example, the cutting blade 29 precisely cuts the injection-molded scraps of the mobile phone casing blank. The integrated cutting design eliminates the need for subsequent separate trimming processes, improving the integration and precision of product processing. Specifically, as shown... Figures 6-11As shown, the following is disclosed: the first sleeve 13 is connected to the side of the moving rod 15 by a first spring 14. A contact rod 16 is installed on the moving rod 15. A first contact ring 17 and a second contact ring 18 are provided inside the first sleeve 13. The first contact ring 17 and the second contact ring 18 are connected to the electromagnetic structure through a wire 19. The contact rod 16 is electrically connected to the electromagnetic plate 20 through the wire 19. The electromagnetic plate 20 is located inside the fixed mold 1 or the moving mold 3. A common magnetic block 23 adapted to the electromagnetic plate 20 is provided on the side of the first moving plate 22. A second spring 24 is installed on the outside of the telescopic rod 21. A pull rod 26 is provided at the end of the moving rod 15. The pull rod 26 extends to the outside of the fixed mold 1 or the moving mold 3. A cutting assembly is provided inside the mold base 5 inside the mobile phone case. The cutting assembly includes an opening... A storage cavity 27 is located inside the mold base 5 inside the phone case. A cutting blade 29 is connected to the storage cavity 27 via a third spring 28. The cutting blade 29 is used to cut injection molding scraps. The side of the storage cavity 27 is connected to an external air pump via a first air supply pipe 30. A cleaning nozzle 31 is installed on one side of the fixed mold 1, and a waste recycling box 32 is installed on the other side of the fixed mold 1. The contact rod 16 on the moving rod 15 moves with it. The contact rod 16 first contacts the second contact ring 18. At this time, the second contact ring 18 is connected to the circuit of the electromagnetic plate 20 via a wire 19. The electromagnetic plate 20 generates a repulsive force to push the ordinary magnetic block 23, causing the first moving plate 22 to move in cooperation with the telescopic rod 21. When the contact rod 16 continues to move and contacts the first contact ring 17, the circuit is activated. The circuit of the electromagnetic plate 20 is connected through the wire 19. The electromagnetic plate 20 generates magnetic force to attract the ordinary magnetic block 23. With the cooperation of the telescopic rod 21, the first moving plate 22 moves, which compresses the second spring 24 and pushes the snap-fit ​​rod 25 into the snap-fit ​​groove 8. This completes the limiting and fixing of the bottom mold base 4 of the mobile phone case with the inner mold base 5 of the mobile phone case, the fixed mold 1 and the moving mold 3. The dual limiting structure of electromagnetic and mechanical combination makes the overall limiting more stable. When disassembly is required, the pull rod 26 is pulled, and the moving rod 15 moves inside the first sleeve 13, which allows the gas inside the first sleeve 13 to be transported to the inclined groove 11 through the delivery pipe 12. The gas pushes the inclined rod 9 inside the inclined groove 11, and at the same time, the first contact ring 17 moves to contact the second contact ring. The ring 18 generates a repulsive force that causes the locking rod 25 to move out of the locking groove 8, achieving rapid release of the limit. This allows for easy and quick disassembly of the bottom mold base 4 and the inner mold base 5 of the phone case, improving mold replacement efficiency. After cooling and molding, an external air pump inflates the storage cavity 27 through the first air supply pipe 30, pushing the cutting blade 29 to extend against the elastic force of the third spring 28, precisely cutting the injection molding scraps of the phone case blank. The integrated cutting design eliminates the need for subsequent separate trimming processes, improving the integration and precision of product processing. After cutting, the air pump outputs gas, causing the nozzle 31 on one side of the fixed mold 1 to spray airflow, blowing the cut scraps towards the recycling box 32 on the other side of the fixed mold 1, achieving waste recycling and preventing scraps from scattering and polluting the production environment.Meanwhile, the recycled waste can be crushed and reused, reducing raw material consumption.

[0026] Example 3: In this example, the lifting plate 34 drives the lifting cylinder 42 to rise synchronously, assisting in ejection from the middle of the phone case, thus improving the overall demolding efficiency. Specifically, as shown below... Figure 2 , Figure 12 and Figure 13 As shown, the following is disclosed: An ejection assembly is installed inside the bottom mold base 4 of the phone case. The ejection assembly includes a drive box installed inside the bottom mold base 4 of the phone case, and a telescopic cylinder 33 is installed inside the drive box. A lifting plate 34 is connected to the telescopic cylinder 33, and a lifting cylinder 42 is connected to the lifting plate 34. The upper surface of the lifting cylinder 42 is on the same horizontal plane as the upper surface of the phone case groove inside the bottom mold base 4 of the phone case. A through hole is opened on the outer side of the lifting cylinder 42. A second sleeve 39 is installed on the side end of the drive box. The upper surface of the second sleeve 39 is on the same horizontal plane as the upper surface of the phone case groove inside the bottom mold base 4 of the phone case. A push rod 37 is connected through the second sleeve 39. The upper surface of the push rod 37 is on the same horizontal plane as the upper surface of the second sleeve 39. A second moving plate 36 is provided below the push rod 37. A magnetic attraction structure 35 is provided on the lifting plate 34 and the second moving plate 36. An air supply box 38 is provided below the second sleeve 39. The air supply box 38 is connected to a pipe... The air supply box 38 is connected to an external air pump. The air supply box 38 is connected to the inner cavity of the temporary storage cylinder 41 through the second air supply pipe 40. The inner cavity of the temporary storage cylinder 41 is connected to the inner cavity of the lifting cylinder 42. The telescopic cylinder 33 of the drive box in the bottom mold base 4 of the mobile phone case is activated, pushing the lifting plate 34 to rise. The second moving plate 36 is attracted by the magnetic structure 35, which drives the ejector rod 37 to rise along the second sleeve 39, lifting the bottom edge of the mobile phone case. At the same time, the lifting plate 34 drives the lifting cylinder 42 to rise synchronously, assisting in ejection from the middle of the mobile phone case. This makes the ejection force evenly distributed, avoiding excessive pressure at a single ejection point that could cause product deformation or damage. The external air pump supplies air to the air supply box 38 through the pipe. The gas enters the temporary storage cylinder 41 through the second air supply pipe 40, and then enters the inner cavity of the lifting cylinder 42. It is ejected from the through hole on the outside of the lifting cylinder 42. The airflow forms an air film between the product and the cavity, further separating the product from the mold cavity, effectively avoiding adhesion problems, ensuring complete demolding of the product, and improving the product qualification rate.

[0027] Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An injection mold for molding a plastic mobile phone casing, comprising a fixed mold (1), wherein a movable mold (3) is connected to the fixed mold (1) via a guide structure (2), characterized in that, The fixed mold (1) is connected to the bottom mold base (4) of the mobile phone case via a limiting component. The moving mold (3) is connected to the inner mold base (5) of the mobile phone case via a limiting component. The moving mold (3) is connected to the inner mold base (5) of the mobile phone case via an injection pipe (6). The bottom mold base (4) of the mobile phone case is provided with a cooling pipe (7). The bottom of both the bottom mold base (4) and the inner mold base (5) of the mobile phone case are provided with tilting rods (9). The sides of both the bottom mold base (4) and the inner mold base (5) of the mobile phone case are provided with snap-fit ​​grooves (8). The limiting component includes a moving block (1) installed inside the fixed mold (1) or the moving mold (3). 0), the movable block (10) is provided with an inclined groove (11) adapted to the inclined rod (9), the movable block (10) is provided with a movable rod (15) on the side end, the movable rod (15) is sleeved inside the first sleeve (13), the first sleeve (13) is located inside the fixed mold (1) or the moving mold (3), the bottom of the inclined groove (11) is connected to the inner cavity of the first sleeve (13) through the conveying pipe (12), the fixed mold (1) or the moving mold (3) is provided with a telescopic rod (21), the telescopic rod (21) is installed with a first movable plate (22) on the side end, and the first movable plate (22) is provided with a snap-fit ​​rod (25) adapted to the snap-fit ​​groove (8) on the side end.

2. The injection mold for molding a plastic mobile phone casing according to claim 1, characterized in that: The first sleeve (13) is connected to the side of the moving rod (15) by a first spring (14). A contact rod (16) is installed on the moving rod (15). A first contact ring (17) and a second contact ring (18) are provided inside the first sleeve (13). The first contact ring (17) and the second contact ring (18) are connected to the electromagnetic structure by a wire (19). The contact rod (16) is electrically connected to the electromagnetic plate (20) by a wire (19).

3. The injection mold for molding a plastic mobile phone casing according to claim 2, characterized in that: The electromagnetic plate (20) is located inside the fixed mold (1) or the moving mold (3). The side end of the first moving plate (22) is provided with a common magnetic block (23) that is compatible with the electromagnetic plate (20). The telescopic rod (21) is equipped with a second spring (24) on its outer side. The end of the moving rod (15) is provided with a pull rod (26), which extends through to the outside of the fixed mold (1) or the moving mold (3).

4. The injection mold for molding a plastic mobile phone casing according to claim 3, characterized in that: The internal mold base (5) of the mobile phone case is provided with a cutting component. The cutting component includes a storage cavity (27) opened inside the internal mold base (5) of the mobile phone case. A cutting blade (29) is connected inside the storage cavity (27) through a third spring (28). The cutting blade (29) is used to cut the injection molded scraps.

5. The injection mold for molding a plastic mobile phone casing according to claim 4, characterized in that: The storage cavity (27) is connected to an external air pump through a first air supply pipe (30). A cleaning nozzle (31) is provided on one side of the fixed mold (1), and a recycling box (32) for recycling waste is installed on the other side of the fixed mold (1).

6. The injection mold for molding a plastic mobile phone casing according to claim 5, characterized in that: The bottom mold base (4) of the mobile phone case is equipped with an ejection assembly. The ejection assembly includes a drive box installed inside the bottom mold base (4) of the mobile phone case, and a telescopic cylinder (33) is provided inside the drive box. A lifting plate (34) is connected to the telescopic cylinder (33).

7. The injection mold for molding a plastic mobile phone casing according to claim 6, characterized in that: The lifting plate (34) is connected to a lifting cylinder (42). The upper surface of the lifting cylinder (42) is on the same horizontal plane as the upper surface of the groove of the mobile phone case inside the bottom mold seat (4) of the mobile phone case. A through hole is opened on the outside of the lifting cylinder (42).

8. The injection mold for molding a plastic mobile phone casing according to claim 7, characterized in that: A second sleeve (39) is installed on the side of the drive box. The upper surface of the second sleeve (39) is on the same horizontal plane as the upper surface of the groove of the mobile phone case inside the bottom mold seat (4) of the mobile phone case. A top rod (37) is connected through the inside of the second sleeve (39). The upper surface of the top rod (37) is on the same horizontal plane as the upper surface of the second sleeve (39).

9. The injection mold for molding a plastic mobile phone casing according to claim 8, characterized in that: A second movable plate (36) is provided below the top rod (37). A magnetic attraction structure (35) is provided on the lifting plate (34) and the second movable plate (36). An air supply box (38) is provided below the second sleeve (39). The air supply box (38) is connected to an external air pump through a pipe. The air supply box (38) is connected to the inner cavity of the temporary storage cylinder (41) through the second air supply pipe (40). The inner cavity of the temporary storage cylinder (41) is connected to the inner cavity of the lifting cylinder (42).

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