Device for quickly replacing movably-inlaid core block of injection mold

Abstract

The invention relates to the technical field of injection molds, in particular to a device for quickly replacing a movably-inlaid core block of an injection mold, which comprises a mold, the movably-inlaid core block, a first fixing rod and a second fixing rod, the mold is provided with a mounting groove, the movably-inlaid core block can be inserted into the mounting groove, and the inner wall of the mounting groove is provided with a first fixing groove and a second fixing groove. The first fixing rod is arranged in the first fixing groove in a sliding mode, the second fixing rod is arranged in the second fixing groove in a sliding mode, the movable insert core block is provided with a first clamping groove and a second clamping groove, the first fixing rod can be inserted into the first clamping groove, the second fixing rod can be inserted into the second clamping groove, and the mold is provided with a driving assembly. The driving assembly is used for driving the first fixing rod and the second fixing rod to move. The device has the effect of improving the replacement convenience of the movably-inlaid core block.

Description

Technical Field

[0001] The invention relates to the technical field of injection molds, in particular to a device for quickly replacing a movable core block of an injection mold. Background Art

[0002] The movable core block is a core block embedded in the core of the injection mold. Some injection molded products have different local structures, while other structures are the same. For this reason, the injection mold realizes multiple functions by setting a replaceable movable core block, that is, when producing product A, movable core block A is installed, and when producing product B, movable core block B is replaced. This type of injection mold is called a movable core block injection mold, or a movable core mold for short.

[0003] The movable core block of the movable core mold in the prior art is fixed to the dynamic model core by bolts. Replacing the movable core block requires offline demolding, that is, the mold needs to be removed from the injection molding machine and offline; the dynamic model carrier plate of the mold is disassembled and separated from the dynamic model core to demold; the fixing bolts are removed under the dynamic model core, the original movable core block is taken out, and the movable core block to be replaced is installed and fixed with bolts, and then the mold is restored, and then the restored mold is installed back on the injection molding machine. The entire mold needs to be disassembled each time the mold is unloaded and installed. Such offline demolding and replacing the movable core block is time-consuming, labor-intensive, and very inconvenient. Summary of the invention

[0004] In order to improve the convenience of replacing movable core blocks, the present application provides a device for quickly replacing movable core blocks in an injection mold.

[0005] The present application provides a device for quickly replacing a movable core block in an injection mold, which adopts the following technical solution: A device for quickly replacing a movable core block in an injection mold comprises a mold, a movable core block, a first fixing rod and a second fixing rod. The mold is provided with a mounting groove, the movable core block can be inserted into the mounting groove, the inner wall of the mounting groove is provided with a first fixing groove and a second fixing groove, the first fixing rod is slidably arranged in the first fixing groove, the second fixing rod is slidably arranged in the second fixing groove, the movable core block is provided with a first clamping groove and a second clamping groove, the first fixing rod can be inserted into the first clamping groove, the second fixing rod can be inserted into the second clamping groove, and the mold is provided with a driving assembly, and the driving assembly is used to drive the first fixing rod and the second fixing rod to move.

[0006] By adopting the above technical solution, after the movable core block is inserted into the mold installation groove, the first fixing rod is driven by the driving component to be inserted into the first card slot, and the second fixing rod is driven into the second card slot, so that the movable core block is installed on the mold. When disassembly is required, the first fixing rod is driven by the driving component to move out of the first card slot, and the second fixing rod is driven to move out of the second card slot. At this time, the movable core block can be taken out of the installation groove to complete the disassembly. The operation is simple and convenient, and there is no need to disassemble the entire mold to replace the movable core block, thereby improving the convenience of replacing the movable core block.

[0007] Preferably, the mold is provided with an auxiliary groove which is communicated with the first fixed groove and the second fixed groove, an auxiliary plate is slidably arranged in the auxiliary groove, the auxiliary plate is provided with a connecting block, the connecting block is connected to the second fixed rod, a transmission assembly is provided between the first fixed rod and the auxiliary plate, and the transmission assembly is used for transmission connection between the first fixed rod and the auxiliary plate.

[0008] By adopting the above technical solution, the auxiliary plate connects the first fixed rod and the second fixed rod with the cooperation of the connecting block and the transmission assembly, so that the first fixed rod and the second fixed rod move synchronously, thereby facilitating the sliding of the first fixed rod and the second fixed rod, thereby improving the convenience of installation and disassembly of the movable core block and facilitating replacement.

[0009] Preferably, the auxiliary groove is communicated with the mounting groove, the bottom wall of the auxiliary groove is provided with an ejection groove, an ejection rod is slidably provided in the ejection groove, an ejection spring connected to the ejection rod is provided in the ejection groove, the ejection rod can be abutted against a movable core block, the auxiliary plate is provided with an ejection hole, and the ejection rod can pass through the ejection hole.

[0010] By adopting the above technical solution, when the movable core block is inserted into the installation slot, the auxiliary plate blocks the ejection hole, thereby resisting the ejection rod. When the first drive rod and the second drive rod are driven by the driving assembly to move out of the first clamping slot and the second clamping slot, the auxiliary plate moves synchronously in this process, so that the ejection hole is aligned with the ejection rod. At this time, the ejection spring restores to push the ejection rod through the ejection hole and pushes the movable core block up a distance so that the first clamping slot and the second clamping slot leak out of the installation slot, which makes it convenient for the staff to take out the movable core block and reduces the difficulty of the staff to take out the movable core block from the installation slot, thereby improving the convenience of replacing the movable core block.

[0011] Preferably, an ejection block is slidably arranged in the ejection hole, the ejection block can be inserted into the ejection hole and abut against the movable core block, and the ejection rod can abut against the ejection block.

[0012] By adopting the above technical solution, the ejector rod pushes the ejector block to eject the movable core block. At the same time, when the movable core block is inserted into the installation groove, the movable core block pushes the ejector block to push the ejector rod out of the ejector hole. There is no need to manually press the ejector rod, thereby improving the convenience of installing the movable core block.

[0013] Preferably, an auxiliary spring is provided in the auxiliary groove, and the auxiliary spring is abutted and connected to the connecting block.

[0014] By adopting the above technical solution, without being driven by the driving component, the auxiliary spring pushes the connecting block and the auxiliary plate to move, so that the first fixing rod remains inserted into the first slot and the second fixing rod remains inserted into the second slot, and the auxiliary spring improves the stability of the movable core block inserted into the installation slot. At the same time, when the movable core block is removed, the ejector rod is inserted into the ejector hole to jam the limiting auxiliary plate to offset the driving force of the auxiliary spring to restore, thereby keeping the first fixing rod and the second fixing rod from being inserted into the installation slot. After the movable core block is removed, the new movable core block will not be affected by the first fixing rod and the second fixing rod, thereby improving the convenience of installing the movable core block.

[0015] Preferably, the transmission assembly includes a transmission gear, a first transmission rack and a second transmission rack, the transmission gear is rotatably arranged in an auxiliary groove, the first transmission rack is arranged on a first fixed rod and meshes with the transmission gear, and the second transmission rack is arranged on an auxiliary plate and meshes with the transmission gear.

[0016] By adopting the above technical solution, when the first fixed rod moves, the transmission gear is driven to rotate through the first transmission rack, and the rotation of the transmission gear drives the auxiliary plate to move through the second transmission rack, thereby realizing transmission. The operation is simple and convenient, and it is easy to use. The movement of the auxiliary plate is driven by the movement of the first fixed rod, which simplifies the operation.

[0017] Preferably, the driving assembly includes a driving shaft and a driving handle, the mold is provided with a driving groove communicated with the auxiliary groove, the driving shaft is rotatably arranged in the driving groove and is connected to the transmission gear, the driving handle is connected to the driving shaft, and the mold is provided with a locking assembly, and the locking assembly is used to lock the driving shaft.

[0018] By adopting the above technical solution, the driving handle is used to drive the driving shaft to rotate, thereby driving the transmission gear to drive the first fixed rod to move, and at the same time, through the connection between the transmission component, the connecting plate and the auxiliary plate, the second fixed rod is driven to move in the direction opposite to the moving direction of the first fixed rod, thereby completing the driven movement of the first fixed rod and the second fixed rod, and at the same time, the driving shaft is locked by the locking component, which can improve the stability of the fixing of the first fixed rod and the second fixed rod.

[0019] Preferably, the mold is provided with a locking groove communicated with the driving groove, the locking assembly includes a locking block and a locking spring, the locking block is slidably arranged in the locking groove, the locking spring is arranged in the locking groove and connected to the locking block, the driving shaft is provided with a locking slot, and the locking block can be inserted into the locking slot.

[0020] By adopting the above technical solution, the locking spring pushes the locking block to slide into the locking slot of the drive shaft, thereby completing the locking. When the lock needs to be released, the locking block can be pushed out of the locking slot. The operation is simple and convenient, and it is easy to use.

[0021] Preferably, the driving assembly also includes a driving rod, which is arranged on the driving handle, the driving shaft is provided with a driving slot communicated with the locking slot, the driving rod is provided with a driving block, the driving rod can be inserted into the driving slot, the driving block can be inserted into the locking slot, and the driving block can be abutted against the locking block.

[0022] By adopting the above technical solution, when it is necessary to drive the first fixed rod and the second fixed rod to move, the locking block is pushed out of the locking slot and the locking spring is compressed, the driving rod is inserted into the driving slot of the driving shaft, and the driving block is inserted into the locking slot to abut against the locking block. At this time, the driving rod can be driven to rotate by the driving handle, and the driving block abuts against the inner wall of the locking slot to drive the driving shaft to rotate. In this process, the locking block abuts against the driving block or the driving shaft and will not affect the rotation of the driving shaft, thereby improving the convenience of driving.

[0023] Preferably, the driving plug block is provided with a first guide surface, and the locking block is provided with a second guide surface, and the first guide surface can be abutted against the second guide surface.

[0024] By adopting the above technical solution, when the driving rod is inserted into the driving slot of the driving shaft, the driving block is inserted into the locking slot, and the first guide surface is pressed against the second guide surface of the locking block, and the locking block is gradually pushed out of the locking slot, thereby automatically releasing the lock and improving the convenience of use.

[0025] In summary, the present application includes at least one of the following beneficial technical effects: 1. By arranging a mold, a movable core block, a first fixing rod, a second fixing rod, an installation groove, a first fixing groove, a second fixing groove, a first clamping groove, a second clamping groove and a driving assembly, after the movable core block is inserted into the mold installation groove, the driving assembly drives the first fixing rod to slide in the first fixing groove and insert into the first clamping groove of the movable core block, and the driving assembly drives the second fixing rod to slide in the second fixing groove and insert into the second clamping groove of the movable core block, so that the movable core block is fixed on the mold. When disassembling, the first fixing rod is driven out of the first clamping groove and the second fixing rod is driven out of the second clamping groove by the driving assembly, and the operation is simple and convenient. It is not necessary to disassemble the entire mold to replace the movable core block, thereby improving the convenience of replacing the movable core block. 2. By providing an auxiliary plate, a connecting plate and a transmission assembly, one end of the auxiliary plate is connected to the first fixing rod through the transmission assembly, and the other end of the auxiliary plate is connected to the second fixing rod through the connecting plate, thereby connecting the first fixing rod and the second fixing rod, so that the movement of the first fixing rod and the second fixing rod can be synchronously driven by the driving assembly, thereby simplifying the operation and improving the convenience of replacing the movable core block; 3. By setting a transmission gear, a first transmission rack and a second transmission rack, when the first fixed rod moves, the transmission gear is driven to rotate through the first transmission rack, and the second transmission rack is driven to move through meshing during the rotation of the transmission gear, thereby driving the auxiliary plate connected to the second transmission rack to move, and the auxiliary plate drives the second fixed rod to move through the connecting block, and the movement directions of the first fixed rod and the second fixed rod are opposite, thereby realizing the synchronous insertion and removal of the first fixed rod and the second fixed rod, and improving the convenience of replacing the movable core block. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is an overall schematic diagram of a device for quickly replacing a movable core block of an injection mold provided in an embodiment of the present application.

[0027] Figure 2 It is a cross-sectional view of a device for quickly replacing a movable core block in an injection mold provided in an embodiment of the present application.

[0028] Figure 3 yes Figure 2 Magnified view of area A.

[0029] Figure 4 It is a cross-sectional view used to show the structure of the drive component.

[0030] Description of reference numerals: 1. mold; 11. mounting groove; 12. first fixing groove; 121. first fixing rod; 13. second fixing groove; 131. second fixing rod; 14. auxiliary groove; 141. ejection groove; 15. driving groove; 16. locking groove; 2. movable core block; 21. first clamping groove; 22. second clamping groove; 3. auxiliary plate; 31. ejection hole; 311. ejection block; 312. limiting groove; 313. limiting block; 32. auxiliary spring; 33. Connecting block; 4. Ejector rod; 41. Ejector spring; 5. Transmission assembly; 51. Transmission gear; 52. First transmission rack; 53. Second transmission rack; 6. Driving assembly; 61. Driving shaft; 611. Driving slot; 612. Locking slot; 62. Driving rod; 621. Driving block; 622. First guide surface; 63. Driving handle; 7. Locking assembly; 71. Locking block; 711. Second guide surface; 72. Locking spring. DETAILED DESCRIPTION

[0031] The following is combined with Figure 1-4 This application is described in further detail.

[0032] The embodiment of the present application discloses a device for quickly replacing a movable core block 2 in an injection mold 1. Figure 1 to Figure 2 , which comprises a mold 1, a movable core block 2, a first fixing rod 121 and a second fixing rod 131. The mold 1 is a detachable structure as a whole and is provided with a mold core at the top (the specific structure of the mold 1 is not shown in the figure), and a mounting groove 11 is provided in the middle of the mold core. The movable core block 2 is adapted to be inserted into the mounting groove 11. The inner walls on both sides of the mounting groove 11 are respectively provided with a first fixing groove 12 and a second fixing groove 13. The first fixing rod 121 is adapted to be slidably arranged in the first fixing groove 12, and the second fixing rod 131 is adapted to be slidably arranged in the second fixing groove 13. The side walls on both sides of the movable core block 2 are respectively provided with a first clamping groove 21 and a second clamping groove 22. The first fixing rod 121 can be adapted to be inserted into the first clamping groove 21, and the second fixing rod 131 can be adapted to be inserted into the second clamping groove 22. The mold 1 is provided with a driving assembly 6 for driving the first fixing rod 121 and the second fixing rod 131 to move. The first fixing rod 121 and the second rod are driven to move by the driving assembly 6, thereby limiting or releasing the movable core block 2, making it convenient to disassemble and replace.

[0033] To improve the convenience of replacement, refer to Figure 2 The mold 1 is provided with an auxiliary groove 14 which is in communication with the first fixed groove 12, the second fixed groove 13 and the installation groove 11. An auxiliary plate 3 is slidably provided at the bottom of the auxiliary groove 14. A transmission assembly 5 is provided between the first fixed rod 121 and the auxiliary plate 3. The transmission assembly 5 is used for transmission connection between the first fixed rod 121 and the auxiliary plate 3. A connecting block 33 is integrally fixedly provided at one end of the auxiliary plate 3 away from the first fixed rod 121. The connecting block 33 is integrally fixedly connected with one end of the second fixed rod 131 away from the first fixed rod 121. An auxiliary spring 32 is fixedly provided on the inner side wall of the auxiliary groove 14. The auxiliary spring 32 is abutted and connected with the side wall of the connecting block 33 away from the first fixed rod 121. The first fixed rod 121 and the second fixed rod 131 are linked by the auxiliary plate 3, the connecting block 33 and the transmission assembly 5, so that the first fixed rod 121 and the second fixed rod 131 can be moved at one time, thereby improving the convenience of replacing the movable core block 2.

[0034] To improve the convenience of disassembly, refer to Figure 2 and Figure 3The bottom wall of the auxiliary groove 14 is provided with a plurality of ejection grooves 141, in which an ejection rod 4 is adapted to slide, and an ejection spring 41 fixedly provided on the bottom wall of the ejection groove 141 and connected to the bottom wall of the ejection rod 4. A plurality of ejection holes 31 are provided through the top wall of the auxiliary plate 3, in which an ejection block 311 is adapted to slide, and limit blocks 313 are fixedly provided at both ends of the ejection block 311. The bottom wall of the auxiliary plate 3 is provided with limit grooves 312 communicating with the ejection holes 31 on both sides of the ejection holes 31, and the limit blocks 313 are adapted to slide in the limit grooves 312. The ejection rod 4 can be adapted to be inserted into the ejection hole 31 and abut against the bottom wall of the ejection block 311, and the ejection block 311 can be inserted into the installation groove 11 and abut against the bottom wall of the movable core block 2. When the movable core block 2 is disassembled, the first fixing rod 121 is disengaged from the first slot 21, and the second fixing rod 131 is disengaged from the second slot 22. During this process, the auxiliary plate 3 moves following the first fixing rod 121, and the ejection hole 31 is aligned with the ejection slot 141. The ejection spring 41 pushes the ejection rod 4 to insert into the ejection hole 31, thereby pushing the ejection block 311 to push the movable core block 2 to rise, so that the first slot 21 and the second slot 22 are exposed, so as to be disassembled.

[0035] In order to improve the convenience of transmission, refer to Figure 2 The transmission assembly 5 includes a transmission gear 51, a first transmission rack 52, and a second transmission rack 53. The transmission gear 51 is rotatably disposed in the auxiliary groove 14 and is located between the first fixed rod 121 and the auxiliary plate 3. The first transmission rack 52 is fixedly disposed on the bottom wall of the first fixed rod 121 and meshes with the transmission gear 51. The second transmission rack 53 is fixedly disposed on the top wall of the auxiliary plate 3 and meshes with the transmission gear 51. When the first fixed rod 121 moves, the transmission gear 51 is driven to rotate by the first transmission rack 52, and the auxiliary plate 3 is driven to move by the second transmission rack 53, thereby driving the second fixed rod 131 to move through the connecting block 33, and the moving direction of the second fixed rod 131 is opposite to that of the first fixed rod 121, so as to facilitate use.

[0036] To improve driving convenience, refer to Figure 2 and Figure 4The driving assembly 6 includes a driving shaft 61, a driving handle 63 and a driving plug rod 62. The side wall of the mold 1 is provided with a circular driving groove 15 which is communicated with the auxiliary groove 14. The driving shaft 61 is adapted to be rotatably arranged in the driving groove 15 and is coaxially fixedly connected with the transmission gear 51. The outer wall of the driving groove 15 is provided with a circular driving slot 611. The driving plug rod 62 is adapted to be inserted into the driving slot 611. The driving handle 63 is arranged on the end wall of the driving plug rod 62 away from the transmission gear 51 and is arranged on the outside of the mold 1. The outer wall of the driving shaft 61 is provided with a locking card slot 612 which is communicated with the driving slot 611. The locking card slot 612 penetrates the end wall of the driving shaft 61 away from the transmission gear 51. The side wall of the driving plug rod 62 is integrally fixedly provided with a driving plug block 621 which can be adapted to be inserted into the locking card slot 612. The mold 1 is provided with a locking assembly 7, and the locking assembly 7 is used to lock the driving shaft 61. After unlocking, insert the driving rod 62 into the driving slot 611 and insert the driving block 621 into the locking slot 612. Rotate the driving handle 63 to drive the transmission gear 51 to rotate through the driving shaft 61, thereby driving the first fixing rod 121 and the second fixing rod 131 to move. The operation is simple, convenient and easy to use.

[0037] For ease of use, refer to Figure 4 The locking assembly 7 includes a locking block 71 and a locking spring 72. The mold 1 is provided with a locking groove 16 communicating with the driving groove 15. The locking block 71 is adapted to be slidably arranged in the locking groove 16. The locking spring 72 is arranged on the top wall of the locking groove 16 and is fixedly abutted and connected with the top wall of the locking block 71. The locking block 71 can enter the driving groove 15 and be inserted into the locking slot 612 on the driving shaft 61. The driving plug block 621 is provided with a first guide surface 622, and the locking block 71 is provided with a second guide surface 711. The first guide surface 622 can abut against the second guide surface 711. When the driving rod 62 is pulled out of the driving slot 611, the locking spring 72 is restored to push the locking block 71 into the locking slot 612. When the driving rod 62 is inserted into the driving slot 611, during this process, the driving block 621 is inserted into the locking slot 612 and abuts against the first guide surface 622 and the second guide surface 711, pushing the locking block 71 out of the locking slot 612. During the rotation of the driving shaft 61, the locking block 71 abuts against the driving block 621 or the driving shaft 61. The locking is automatically performed or released, which is convenient for use.

[0038] The implementation principle of a device for quickly replacing a movable core block 2 in an injection mold 1 according to an embodiment of the present application is as follows: when the movable core block 2 needs to be replaced, the driving rod 62 is inserted into the driving slot 611 of the driving shaft 61, so that the driving block 621 is inserted into the locking slot 612 and pushes the locking block 71 to disengage from the locking slot 612 to release the lock. At this time, the driving handle 63 is rotated to drive the transmission gear 51 to rotate, and the first transmission rack 52 drives the first fixed rod 121 to move and disengage from the first slot 21. At the same time, the second transmission rack 53 drives the auxiliary plate 3 to move, thereby driving the second fixed rod 131 to disengage from the second slot 22. During this process, the auxiliary plate 3 moves and compresses the auxiliary spring 32. At the same time, when the first fixing rod 121 disengages from the first slot 21 and the second fixing rod 131 disengages from the second slot 22, the ejection hole 31 aligns with the ejection slot 141, and the ejection spring 41 pushes the ejection rod 4 to insert into the ejection hole 31, and pushes the movable core block 2 to rise through the ejection block 311, so that the first slot 21 and the second slot 22 are exposed, so that the movable core block 2 can be removed from the installation slot 11, and the ejection rod 4 clamps the auxiliary plate 3.

[0039] When installing a new movable core block 2, insert the movable core block 2 into the installation slot 11 and push the ejection block 311 back into the ejection hole 31, so that the ejection rod 4 is disengaged from the ejection hole 31. At this time, the auxiliary spring 32 is restored to push the auxiliary plate 3 to move, thereby driving the first fixed rod 121 to reset and insert it into the first slot 21, and the second fixed rod 131 to reset and insert it into the second slot 22, and the installation is completed. At the same time, during this process, the drive shaft 61 is reset. At this time, the drive rod 62 can be pulled out by the drive handle 63. At the same time, the locking spring 72 is restored to push the locking block 71 into the locking slot 612 for locking. The replacement of the movable core block 2 of the present application does not require the disassembly of the overall mold 1, which improves the convenience of replacement.

[0040] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A device for quickly replacing movable core blocks in an injection mold, characterized in that: The invention comprises a mould (1), a movable core block (2), a first fixing rod (121) and a second fixing rod (131); the mould (1) is provided with a mounting groove (11); the movable core block (2) can be inserted into the mounting groove (11); the inner wall of the mounting groove (11) is provided with a first fixing groove (12) and a second fixing groove (13); the first fixing rod (121) is slidably arranged in the first fixing groove (12); the second fixing rod (131) is slidably arranged in the second fixing groove (13); the movable core block (2) is provided with a first clamping groove (21) and a second clamping groove (22); the first fixing rod (121) can be inserted into the first clamping groove (21); the second fixing rod (131) can be inserted into the second clamping groove (22); the mould (1) is provided with a driving assembly (6); the driving assembly (6) is used to drive the first fixing rod (121) and the second fixing rod (131) to move.

2. A device for quickly replacing movable core blocks in an injection mold according to claim 1, characterized in that: The mold (1) is provided with an auxiliary groove (14) which is in communication with the first fixed groove (12) and the second fixed groove (13); an auxiliary plate (3) is slidably arranged in the auxiliary groove (14); the auxiliary plate (3) is provided with a connecting block (33); the connecting block (33) is connected to the second fixed rod (131); a transmission assembly (5) is provided between the first fixed rod (121) and the auxiliary plate (3); the transmission assembly (5) is used for transmission connection between the first fixed rod (121) and the auxiliary plate (3).

3. The device for quickly replacing movable core blocks in an injection mold according to claim 2, characterized in that: The auxiliary groove (14) is communicated with the mounting groove (11); the bottom wall of the auxiliary groove (14) is provided with an ejection groove (141); an ejection rod (4) is slidably provided in the ejection groove (141); an ejection spring (41) connected to the ejection rod (4) is provided in the ejection groove (141); the ejection rod (4) can be abutted against the movable core block (2); the auxiliary plate (3) is provided with an ejection hole (31); the ejection rod (4) can pass through the ejection hole (31).

4. A device for quickly replacing movable core blocks in an injection mold according to claim 3, characterized in that: An ejection block (311) is slidably arranged in the ejection hole (31); the ejection block (311) can be inserted into the ejection hole (31) and abut against the movable core block (2); and the ejection rod (4) can abut against the ejection block (311).

5. The device for quickly replacing movable core blocks in an injection mold according to claim 3, characterized in that: An auxiliary spring (32) is arranged in the auxiliary groove (14), and the auxiliary spring (32) is abutted and connected to the connecting block (33).

6. The device for quickly replacing movable core blocks in an injection mold according to claim 2, characterized in that: The transmission assembly (5) comprises a transmission gear (51), a first transmission rack (52) and a second transmission rack (53); the transmission gear (51) is rotatably arranged in the auxiliary groove (14); the first transmission rack (52) is arranged on the first fixing rod (121) and meshes with the transmission gear (51); and the second transmission rack (53) is arranged on the auxiliary plate (3) and meshes with the transmission gear (51).

7. The device for quickly replacing movable core blocks in an injection mold according to claim 6, characterized in that: The driving assembly (6) comprises a driving shaft (61) and a driving handle (63); the mold (1) is provided with a driving groove (15) communicating with the auxiliary groove (14); the driving shaft (61) is rotatably arranged in the driving groove (15) and is connected to the transmission gear (51); the driving handle (63) is connected to the driving shaft (61); the mold (1) is provided with a locking assembly (7); and the locking assembly (7) is used to lock the driving shaft (61).

8. The device for quickly replacing movable core blocks in an injection mold according to claim 7, characterized in that: The mold (1) is provided with a locking groove (16) communicating with the driving groove (15); the locking assembly (7) comprises a locking block (71) and a locking spring (72); the locking block (71) is slidably arranged in the locking groove (16); the locking spring (72) is arranged in the locking groove (16) and connected to the locking block (71); the driving shaft (61) is provided with a locking slot (612); the locking block (71) can be inserted into the locking slot (612).

9. The device for quickly replacing movable core blocks in an injection mold according to claim 8, characterized in that: The driving assembly (6) further comprises a driving rod (62), wherein the driving rod (62) is arranged on the driving handle (63), the driving shaft (61) is provided with a driving slot (611) communicating with the locking slot (612), the driving rod (62) is provided with a driving block (621), the driving rod (62) can be inserted into the driving slot (611), the driving block (621) can be inserted into the locking slot (612), and the driving block (621) can abut against the locking block (71).

10. The device for quickly replacing movable core blocks in an injection mold according to claim 9, characterized in that: The driving plug block (621) is provided with a first guide surface (622), and the locking block (71) is provided with a second guide surface (711), and the first guide surface (622) can abut against the second guide surface (711).

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