Hub injection mold for medical wheelchair and hub of hub injection mold

Abstract

The invention discloses a hub injection mold for a medical wheelchair and a hub thereof, and belongs to the technical field of injection molds, the hub injection mold comprises a base, a bottom plate is arranged on the base, a fixed mold is arranged on the bottom plate, a movable mold is arranged above the fixed mold, a top plate is arranged on the movable mold, a first forming cavity is formed in the bottom surface of the movable mold, and a second forming cavity is formed in the top surface of the fixed mold; a pouring hole is formed in the top surface of the top plate and penetrates through the top plate and the movable mold, runners are formed in the top surface of the fixed mold and the top surface of the movable mold and communicate with the pouring hole, the first forming cavity and the second forming cavity correspondingly, and a first cooling assembly used for cooling a pouring material in the first forming cavity is arranged in the movable mold; a second cooling assembly used for cooling a pouring material in the second forming cavity is arranged in the fixed mold. The hub forming device has the effect of improving the hub forming efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of injection molds, and in particular to an injection mold for a wheelchair hub and the wheel hub thereof. Background Technology

[0002] Injection molds are tools used to produce plastic products, giving them a complete structure and precise dimensions. They are also a processing method used in the mass production of parts, primarily in industrial applications. The injection molding process involves injecting molten material under high pressure into a mold cavity, where it cools and solidifies to obtain the molded product. Based on molding characteristics, injection molds are classified into two types: thermosetting plastic molds and thermoplastic plastic molds.

[0003] Existing medical wheelchair hubs are typically manufactured using injection molding. When the heated and molten material is poured into the molding cavity, the high temperature of the molten material results in a longer solidification time, thus reducing the efficiency of hub molding. Summary of the Invention

[0004] To address the issue of prolonged material solidification time within the molding cavity, which reduces wheel hub molding efficiency, this application provides an injection mold for a medical wheelchair and the wheel hub thereof.

[0005] The technical solution provided in this application for a wheelchair hub injection mold is as follows: A wheel hub injection mold for medical wheelchairs includes a base, a bottom plate on the base, a fixed mold on the bottom plate, a movable mold above the fixed mold, a top plate on the movable mold, a first molding cavity on the bottom surface of the movable mold, a second molding cavity on the top surface of the fixed mold, a pouring hole on the top surface of the top plate penetrating the top plate and the movable mold, flow channels on the top surfaces of both the fixed mold and the movable mold, the flow channels communicating with the pouring hole, the first molding cavity, and the second molding cavity, respectively, a cooling component 1 for cooling the material poured in the first molding cavity, and a cooling component 2 for cooling the material poured in the second molding cavity, both located within the movable mold and the fixed mold.

[0006] By adopting the above technical solution, when it is necessary to cast the wheel hub, the moving mold is moved downward so that the bottom surface of the moving mold is in contact with the top surface of the fixed mold. The first forming cavity and the second forming cavity form the wheel hub casting cavity. Then, the high-temperature molten material is poured into the casting hole. The molten material flows into the flow channel through the casting hole, and then flows into the wheel hub casting cavity formed by the first forming cavity and the second forming cavity through the flow channel. Then, the cooling components on the moving mold and the fixed mold are cooled by the cooling components on the moving mold and the fixed mold respectively, thereby accelerating the cooling time of the casting material in the first forming cavity and the second forming cavity, and thus improving the forming efficiency of the wheel hub.

[0007] Preferably, the first cooling component includes a cooling pipe formed on the top surface of the moving mold, the cooling pipe being located above the first molding cavity, a water inlet pipe being formed at one end of the inner side of the cooling pipe, and a water outlet pipe being formed at the other end of the inner side of the cooling pipe, the water inlet pipe and the water outlet pipe penetrating the side of the moving mold, the second cooling component having the same structure as the first cooling component, and the second cooling component being disposed on the bottom surface of the fixed mold.

[0008] By adopting the above technical solution, cooling water is connected to the inlet pipe through an external water pipe, allowing the cooling water to flow into the cooling pipe. This cools the moving and fixed molds. The water in the cooling pipe is then discharged through the outlet pipe, ensuring that the cooling water in the cooling pipe is in a circulating state. This reduces the possibility of the cooling water remaining in the cooling pipe for too long, causing its temperature to rise and reducing its cooling effect on the moving and fixed molds.

[0009] Preferably, the inner bottom surface of the cooling pipe is provided with multiple grooves.

[0010] By adopting the above technical solution, multiple grooves are opened on the inner bottom surface of the cooling pipe, thereby increasing the contact area between the cooling water and the moving and fixed molds, and thus improving the cooling efficiency of the cooling water on the fixed and moving molds.

[0011] Preferably, the bottom surface of the top plate has a channel one, the top surface of the moving mold has a through hole one, the through hole one is connected to the molding cavity one, a connecting pipe one is provided in the through hole one, the bottom end of the connecting pipe one is located in the molding cavity one, and two channels two are provided on the inner circumferential surface of the channel one, the two channels two respectively penetrate the two sides of the top plate.

[0012] By adopting the above technical solution, cooling water is transported to one of the channels two through the external pipe, so that the cooling water flows into channel one through channel two, and then flows into connecting pipe one through channel one, thereby cooling the center position of the casting hub in the connecting pipe pair, thereby improving the molding efficiency of the casting hub.

[0013] Preferably, a sealing ring one is provided on the top surface of the moving mold, the sealing ring one is located on the periphery of the cooling pipe, and a sealing ring two is provided on the top surface of the connecting pipe one. The top surfaces of the sealing ring one and the sealing ring two respectively abut against the bottom surface of the top plate.

[0014] By adopting the above technical solution, the top surfaces of sealing ring one and sealing ring two abut against the bottom surface of the top plate, so that sealing ring one seals the connection between the cooling pipe and the top plate, and sealing ring two seals the connection between connecting pipe one and the top plate, thereby reducing the possibility of water leakage at the connection between the cooling pipe and connecting pipe one and the top plate.

[0015] Preferably, the bottom surface of the fixed mold has multiple mounting grooves, and the inner top surface of each mounting groove has a through hole II, which communicates with the molding cavity II. A cooling water circuit conversion plate is provided in the mounting groove, and a connecting pipe II is connected to the top surface of the cooling water circuit conversion plate. The connecting pipe II is inserted into the through hole II, and the top end of the connecting pipe II is located in the molding cavity II. The opposite end faces of the connecting pipe I and the connecting pipe II are in contact with each other. Pipes are connected to both sides of the cooling water circuit conversion plate. The inner sides of the mounting grooves have recesses, and two recesses penetrate both sides of the fixed mold. Two pipes are respectively disposed in the two recesses. The fixed mold is provided with a fixing member for fixing the pipes in the recesses.

[0016] By adopting the above technical solution, cooling water is transported to the pipeline through an external water pipe. The pipeline then transports the cooling water to the cooling water circuit conversion plate, which in turn transports the cooling water to the connecting pipe two. This allows the connecting pipe two to cool the center of the casting material inside the molding cavity two, thereby improving the molding efficiency of the casting material inside the molding cavity two. When the moving mold abuts against the top surface of the fixed mold, the bottom surface of the connecting pipe one and the top surface of the connecting pipe two abut against each other. As the casting material in the molding cavity one and the molding cavity two solidifies, the positions of the connecting pipe one and the connecting pipe two form the center hole of the wheel hub, which facilitates the subsequent installation of the wheel hub on the axle.

[0017] Preferably, the fixing member includes a limiting block located below the groove, the outer peripheral surface of the pipeline abuts against the top surface of the limiting block, and the limiting block is fixed to the bottom surface of the base plate by screws.

[0018] By adopting the above technical solution, when the cooling water circuit conversion plate is fixed in the mounting groove, the pipe is inserted into the groove, and then the limiting block is fixed to the bottom surface of the base plate with screws, so that the limiting block supports the pipe and thus fixes the pipe in the groove.

[0019] Preferably, the inner walls of both the first molding cavity and the second molding cavity are provided with multiple insertion slots, and each of the multiple insertion slots is provided with an exhaust insert.

[0020] By adopting the above technical solution, venting inserts are set on the fixed mold and the moving mold. When the molten material flows into the first and second molding cavities, the gas in the first and second molding cavities is discharged through the venting inserts, thereby reducing the possibility of air bubbles being generated when the casting material in the first and second molding cavities solidifies, and thus improving the molding quality of the wheel hub.

[0021] Preferably, a movable block is provided on the top surface of the base, and multiple circular holes are provided on the inner wall of the second molding cavity. A circular hole is provided on the inner circumferential surface of the flow channel located on the top surface of the fixed mold. Both the first and second circular holes penetrate the base plate. A first ejector rod is inserted into the first circular hole, and a second ejector rod is inserted into the second circular hole. The bottom ends of the first and second ejector rods are fixed to the top surface of the movable block.

[0022] By adopting the above technical solution, after the material poured in the first and second molding cavities solidifies, the moving mold is moved upward to separate from the fixed mold. Then, the moving block is moved upward, which drives the ejector rods one and two upward. This causes the ejector rod one to lift the wheel hub formed in the second molding cavity upward, and the ejector rod two to push the excess material in the flow channel out of the flow channel, making it easier for the workers to remove the formed wheel hub.

[0023] A wheel hub for a medical wheelchair includes a rim and an inner ring for mounting an axle, with spokes disposed between the rim and the inner ring.

[0024] In summary, this application includes at least one of the following beneficial technical effects: 1. When casting a wheel hub, the moving mold is moved downwards so that the bottom surface of the moving mold is in contact with the top surface of the fixed mold. Molding cavity one and molding cavity two form a wheel hub casting cavity. Then, the high-temperature molten material is poured into the casting hole. The molten material flows into the runner through the casting hole and then into the wheel hub casting cavity formed by molding cavity one and molding cavity two. Then, the cooling components one on the moving mold and two on the fixed mold cool the moving mold and the fixed mold respectively, thereby accelerating the cooling time of the casting material in molding cavity one and molding cavity two, and thus improving the forming efficiency of the wheel hub. 2. Cooling water is delivered to the pipeline through an external water pipe. The pipeline then delivers the cooling water to the cooling water conversion plate, which in turn delivers the cooling water to the second connecting pipe. This allows the second connecting pipe to cool the center of the casting material inside the second molding cavity, thereby improving the molding efficiency of the casting material in the second molding cavity. When the moving mold abuts against the top surface of the fixed mold, the bottom surface of the first connecting pipe and the top surface of the second connecting pipe abut against each other. This allows the casting material in the first and second molding cavities to solidify, forming the center hole of the wheel hub at the positions of the first and second connecting pipes, thus facilitating the later installation of the wheel hub on the axle. 3. Venting inserts are installed on the fixed mold and the moving mold. When the molten material flows into the first and second molding cavities, the gas in the first and second molding cavities is discharged through the venting inserts, thereby reducing the possibility of air bubbles being generated when the casting material in the first and second molding cavities solidifies, and thus improving the molding quality of the wheel hub. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of the injection mold for the wheel hub of a medical wheelchair in this application embodiment.

[0026] Figure 2 This is a schematic diagram of the fixed mold structure in an embodiment of this application.

[0027] Figure 3 This is a schematic diagram of the structure of the moving model in the embodiments of this application.

[0028] Figure 4 This is a schematic diagram of the structure of sealing ring one in the embodiments of this application.

[0029] Figure 5 This is a cross-sectional view of the top plate in an embodiment of this application.

[0030] Figure 6 This is a schematic diagram of the structure of the base plate in an embodiment of this application.

[0031] Figure 7 yes Figure 2 Enlarged diagram of point A in the middle.

[0032] Figure 8 This is a schematic diagram of the structure of the base plate in an embodiment of this application.

[0033] Figure 9 This is a schematic diagram of the wheel hub in an embodiment of this application.

[0034] Reference numerals: 1. Base; 11. Base plate; 12. Fixed mold; 13. Moving mold; 14. Top plate; 15. Molding cavity one; 16. Molding cavity two; 2. Runner; 21. Casting hole; 22. Casting pipe; 23. Insert groove; 24. Exhaust insert; 3. Cooling component one; 31. Cooling component two; 32. Cooling pipe; 33. Water inlet pipe; 34. Water outlet pipe; 35. Settlement tank; 36. Sealing ring one; 4. Channel one; 41. Channel two; 42. 43. Connecting pipe 1; 44. Sealing ring 2; 5. Mounting groove; 51. Cooling water circuit conversion plate; 52. Through hole 2; 53. Pipeline; 54. Embedded groove; 55. Fixing component; 551. Limiting block; 56. Connecting pipe 2; 6. Moving block; 61. Round hole 1; 62. Top rod 1; 63. Round hole 2; 64. Top rod 2; 65. Guide rod; 66. Guide hole; 67. Spring; 7. Rim; 71. Inner ring; 72. Spoke; 73. Reinforcing rib. Detailed Implementation

[0035] The following is in conjunction with the appendix Figure 1-9 This application will be described in further detail.

[0036] This application discloses an injection mold for a wheelchair hub.

[0037] Reference Figure 1 A wheel hub injection mold for a medical wheelchair includes a base 1 and a base plate 11 fixed to the base 1 by bolts. A fixed mold 12 is provided on the base plate 11, and the base plate 11 is fixedly connected to the fixed mold 12 by bolts. A movable mold 13 is provided above the fixed mold 12, and a top plate 14 is provided on the top surface of the movable mold 13, and the top plate 14 is fixedly connected to the movable mold 13 by bolts.

[0038] Reference Figure 1 , Figure 2 and Figure 3 The bottom surface of the moving mold 13 has three forming cavities 15, and the top surface of the fixed mold 12 has three forming cavities 16. The forming cavities 15 and 16 together form a hub forming cavity. The top surface of the top plate 14 has a pouring hole 21 that vertically penetrates the top plate 14 and the moving mold 13. A pouring pipe 22 is fixed inside the pouring hole 21, and the bottom end of the pouring pipe 22 is in contact with the top surface of the fixed mold 12. The top surface of the fixed mold 12 and the bottom surface of the moving mold 13 each have three flow channels 2. The three flow channels 2 are interconnected and arranged in a Y-shape. The three flow channels 2 are respectively connected to the three forming cavities 16, and the bottom outlet of the pouring pipe 22 is connected to the three flow channels 2. Multiple insertion slots 23 are provided on the inner walls of both molding cavity 15 and molding cavity 26. The insertion slots 23 on molding cavity 15 penetrate the moving mold 13, and the insertion slots 23 on molding cavity 26 penetrate the fixed mold 12. An exhaust insert 24 is fixed in the insertion slots 23.

[0039] Reference Figure 2 , Figure 3 and Figure 4The moving mold 13 is equipped with a cooling component 3 for cooling the material poured into the molding cavity 15, and the fixed mold 12 is equipped with a cooling component 31 for cooling the material poured into the molding cavity 16. The cooling component 3 includes three cooling pipes 32 formed on the top surface of the moving mold 13. One of the three cooling pipes 32 is an open circle, and the other two are semi-circular at one end and triangular at the other. The triangular end is not connected to the semi-circular end, resulting in a more even distribution of the cooling pipes 32 on the moving mold 13 and improving the cooling efficiency of the moving mold 13. A water inlet pipe 33 is formed at one end of the inner side of the cooling pipe 32, and a water outlet pipe 34 is formed at the other end of the inner side of the cooling pipe 32. The water inlet pipe 33 and the water outlet pipe 34 penetrate the side of the moving mold 13. Multiple grooves 35 are formed on the inner bottom surface of the cooling pipes 32, and the grooves 35 extend upwards through the top surface of the moving mold 13. Three sealing rings 36 are fixed on the top surface of the moving mold 13. The three sealing rings 36 correspond to the three cooling pipes 32. The sealing rings 36 are located around the cooling pipes 32, and the top surface of the sealing rings 36 abuts against the bottom surface of the top plate 14. The second cooling component 31 is located on the bottom surface of the fixed mold 12. The second cooling component 31 has the same structure as the first cooling component 3.

[0040] Reference Figure 3 and Figure 5 The bottom surface of the top plate 14 has three channels 4, and the inner circumferential surface of each channel 4 has two channels 41, which penetrate adjacent sides of the top plate 14. The top surface of the moving mold 13 has three through holes 42, which are connected to three molding cavities 15. The central axis of each through hole 42 is collinear with the central axis of each molding cavity 15, and the three through holes 42 correspond to the three channels 4. A connecting pipe 43 is fixed inside each through hole 42. The central axis of the connecting pipe 43 is collinear with the central axis of each channel 4, and the bottom end of the connecting pipe 43 is located inside the molding cavity 15. A sealing ring 44 is fixed to the top surface of the connecting pipe 43, and the top surface of the sealing ring 44 abuts against the bottom surface of the top plate 14.

[0041] Reference Figure 2 , Figure 4 and Figure 6 The bottom surface of the base plate 11 has three mounting slots 5, which correspond to three molding cavities 16. A cooling water conversion plate 51 is fixed within each of the three mounting slots 5. A through hole 52 is formed on the inner top surface of each mounting slot 5, extending upwards through the base plate 11 and the moving mold 13. The through hole 52 is connected to the molding cavity 16, and its central axis is collinear with the central axis of the molding cavity 16. A connecting pipe 56 is fixed to the top surface of the cooling water conversion plate 51. The connecting pipe 56 passes through the through hole 52, with its top end located within the molding cavity 16. The top surface of the connecting pipe 56 abuts against the bottom surface of the connecting pipe 43.

[0042] Reference Figure 6 The cooling water circuit conversion plate 51 has pipes 53 fixedly connected to both sides. The inner sides of the mounting groove 5 are each provided with a recess 54, which penetrates the bottom surface of the base plate 11. The ends of the two recesses 54 that are far apart from each other penetrate the two sides of the base plate 11 respectively. The pipes 53 on both sides of the cooling water circuit conversion plate 51 are respectively located within the two recesses 54. The base plate 11 is provided with multiple sets of fixing members 55 for fixing multiple pipes 53 into multiple recesses 54. Each set of fixing members 55 includes a limiting block 552. Multiple limiting blocks 551 are located directly below the recess 54, and the limiting plates 551 are fixed to the bottom surface of the base plate 11 by screws.

[0043] Reference Figure 1 and Figure 2 A movable block 6 is provided on the inner bottom surface of the base 1. Multiple circular holes 61 are formed on the inner wall of the molding cavity 16, penetrating the moving mold 13 and the base plate 11 vertically. These holes are evenly spaced circumferentially around the molding cavity 16. A push rod 62 is inserted into each circular hole 61, with its bottom end fixed to the top surface of the movable block 6. Circular holes 63 are formed on the inner bottom surfaces of the three flow channels 2, penetrating the fixed mold 12 and the base plate 11 vertically. Push rods 64 are inserted into each circular hole 63, with their bottom ends fixed to the top surface of the movable block 6. Guide rods 65 are fixed to the corners of the top surface of the movable block 6. Guide holes 66 are formed at the corners of the bottom surface of the base plate 11, penetrating the top surface of the moving mold 12. The top ends of the guide rods 65 are inserted into the guide holes 66. A spring 67 is fitted on the outer periphery of the guide rod 65. The top end of the spring 67 is fixed to the bottom surface of the base plate 11, and the bottom end of the spring 67 is fixed to the top surface of the moving block 6.

[0044] When it is necessary to remove the solidified wheel hub from the molding cavity 16, the moving mold 13 is moved upward, disengaging it from the fixed mold 12. Then, the moving block 6 is moved upward, causing ejector pins 62 and 64 to move upward. This allows ejector pin 62 to lift the molded wheel hub from the molding cavity 16, and ejector pin 64 to lift excess solidified material from the runner 2, making it easier for the operator to remove the molded wheel hub from the injection mold. After the wheel hub is removed from the injection mold, the operator releases the moving block 6, which moves downward under the force of the spring 67, causing the moving block 6 to move ejector pins 62 and 64 back to their initial positions.

[0045] Reference Figure 9 A wheel hub for a medical wheelchair includes a rim 7 and an inner ring 71 for mounting an axle. A spoke 72 is provided between the rim 7 and the inner ring 71. Reinforcing ribs 73 are cast on both sides of the spoke 72.

[0046] The implementation principle of the injection mold for a medical wheelchair hub in this embodiment is as follows: When injection molding of a medical wheelchair hub is required, the moving mold 13 is moved downward so that its bottom surface abuts against the top surface of the fixed mold 12. Then, the heated and molten material is poured into the pouring hole 21, allowing the molten material to flow into the pouring pipe 22. The pouring pipe 22 transports the molten material to three flow channels 2, which in turn transport the molten material to three molding cavities 15, filling both molding cavities 15 and 16. Then, cooling water is connected to the water inlet pipe 33, which transports the cooling water to the cooling tank. The cooling water in the cooling tank cools the fixed mold 12 and the moving mold 13, thereby increasing the cooling time of the material poured into molding cavities 15 and 16. Then, cooling water is connected to channel 41 on top plate 14 and pipe 53 on bottom plate 11. Channel 41 delivers cooling water to channel 4, and channel 4 delivers cooling water to connecting pipe 43, so that connecting pipe 43 cools the center of the casting material in molding cavity 15. The pipe delivers cooling water to cooling water circuit conversion plate 51, and cooling water circuit conversion plate 51 delivers cooling water to connecting pipe 56, so that connecting pipe 56 cools the center of the casting material in molding cavity 16, thereby further improving the molding time of the casting material in molding cavity 15 and molding cavity 16 and improving the molding efficiency of the wheel hub.

[0047] The above are all preferred embodiments of this application, and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A medical wheelchair hub injection mold characterized by: The utility model provides a kind of mould, including base (1), bottom plate (11) is provided on the base (1), fixed mould (12) is provided on the bottom plate (11), the top of fixed mould (12) is provided with movable mould (13), top plate (14) is provided on movable mould (13), the bottom surface of movable mould (13) is opened with forming cavity one (15), the top surface of fixed mould (12) is opened with forming cavity two (16), the top surface of top plate (14) is opened with pouring hole (21), pouring hole (21) penetrates top plate (14) and movable mould (13), the top surface of fixed mould (12) and the top surface of movable mould (13) are opened with runner (2), runner (2) is communicated with pouring hole (21), forming cavity one (15) and forming cavity two (16) respectively, cooling assembly one (3) for pouring material in forming cavity one (15) is provided in movable mould (13), cooling assembly two (31) for pouring material in forming cavity two (16) is provided in fixed mould (12).

2. The injection mold for a medical wheelchair hub as set forth in claim 1, wherein: The utility model provides a kind of mould, including base (1), bottom plate (11) is provided on the base (1), fixed mould (12) is provided on the bottom plate (11), the top of fixed mould (12) is provided with movable mould (13), top plate (14) is provided on movable mould (13), the bottom surface of movable mould (13) is opened with forming cavity one (15), the top surface of fixed mould (12) is opened with forming cavity two (16), the top surface of top plate (14) is opened with pouring hole (21), pouring hole (21) penetrates top plate (14) and movable mould (13), the top surface of fixed mould (12) and the top surface of movable mould (13) are opened with runner (2), runner (2) is communicated with pouring hole (21), forming cavity one (15) and forming cavity two (16) respectively, cooling assembly one (3) for pouring material in forming cavity one (15) is provided in movable mould (13), cooling assembly two (31) for pouring material in forming cavity two (16) is provided in fixed mould (12).

3. The injection mold for a medical wheelchair hub as set forth in claim 2, wherein: The inner bottom surface of the cooling pipeline (32) is provided with a plurality of grooves (35).

4. The injection mold for a medical wheelchair hub as set forth in claim 2, wherein: The bottom surface of the top plate (14) is provided with a channel one (4), the top surface of the movable mold (13) is provided with a through hole one (42), the through hole one (42) is communicated with the forming cavity one (15), the connecting pipe one (43) is arranged in the through hole one (42), the bottom end of the connecting pipe one (43) is located in the forming cavity one (15), the inner circumferential surface of the channel one (4) is provided with two channel two (41), and the two channel two (41) penetrate through the two side surfaces of the top plate (14).

5. The injection mold for a medical wheelchair hub as set forth in claim 4, wherein: The top surface of the movable mold (13) is provided with a sealing ring one (36), the sealing ring one (36) is located on the circumferential side of the cooling pipeline (32), the top surface of the connecting pipe one (43) is provided with a sealing ring two (44), the top surface of the sealing ring one (36) and the top surface of the sealing ring two (44) are respectively abutted with the bottom surface of the top plate (14).

6. The injection mold for a medical wheelchair hub as set forth in claim 4, wherein: The bottom surface of the fixed mold (12) is provided with a plurality of mounting grooves (5), the inner top surface of the mounting groove (5) is provided with a through hole two (52), the through hole two (52) is communicated with the forming cavity two (16), the mounting groove (5) is provided with a cooling waterway conversion plate (51), the top surface of the cooling waterway conversion plate (51) is connected with a connecting pipe two (56), the connecting pipe two (56) is inserted into the through hole two (52), the top end of the connecting pipe two (56) is located in the forming cavity two (16), the opposite end surfaces of the connecting pipe one (43) and the connecting pipe two (56) are attached, the both sides of the cooling waterway conversion plate (51) are connected with a pipeline (53), the opposite inner sides of the mounting groove (5) are provided with an embedding groove (54), the two embedding grooves (54) penetrate the both sides of the fixed mold (12), the two pipelines (53) are arranged in the two embedding grooves (54), and the fixed mold (12) is provided with a fixing piece (55) for fixing the pipeline (53) in the embedding groove (54).

7. The injection mold for a medical wheelchair hub as set forth in claim 6, wherein: The fixing piece (55) comprises a limiting block (551), the limiting block (551) is located below the embedding groove (54), the outer circumferential surface of the pipeline (53) abuts against the top surface of the limiting block (551), and the limiting block (551) is fixed to the bottom surface of the bottom plate (11) through a screw.

8. The injection mold for a medical wheelchair hub as set forth in claim 1, wherein: The inner walls of the forming cavity one (15) and the forming cavity two (16) are provided with a plurality of plug-in grooves (23), and the plurality of plug-in grooves (23) are provided with exhaust inserts (24).

9. The injection mold for a medical wheelchair hub as defined in claim 1, wherein: The top surface of the base (1) is provided with a moving block (6), the inner wall of the forming cavity two (16) is provided with a plurality of round holes one (61), the inner circumferential surface of the flow channel (2) located on the top surface of the fixed mold (12) is provided with a round hole two (63), the round hole one (61) and the round hole two (63) penetrate the bottom plate (11), a top rod one (62) is inserted into the round hole one (61), a top rod two (64) is inserted into the round hole two (63), and the bottom ends of the top rod one (62) and the top rod two (64) are fixed to the top surface of the moving block (6).

10. A medical wheelchair hub according to any one of claims 1-9, characterized by an injection mould for a medical wheelchair hub according to any one of claims 1-9. The rim (7) and the inner ring (71) are provided with spokes (72).

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