Sectional core-pulling U-shaped elbow injection mold

Abstract

The utility model relates to the technical field of injection molds, in particular to a segmented core-pulling U-shaped elbow injection mold which is characterized in that a U-shaped mold cavity is arranged between a movable mold core and a fixed mold core, two openings of the mold cavity are respectively provided with a fixed core-pulling block, the inner side of each fixed core-pulling block is sequentially connected with a plurality of movable core-pulling blocks in a clamping manner, and the movable core-pulling blocks are connected with the movable core-pulling blocks in a clamping manner; a first core-pulling base, a second core-pulling base and a fixing plate are movably arranged in the protection plate, a first buckling machine combination mechanism is arranged between the first core-pulling base and the fixing plate, and a second buckling machine combination mechanism is arranged between the bottom of the fixing plate and the bottom of the second core-pulling base. According to the utility model, the problem that the inner hole of the middle arc section cannot be demoulded by the traditional direct core-pulling and arc core-pulling methods is solved, the straight edge part of the U-shaped bent pipe can be separated firstly, and then the arc section part of the U-shaped bent pipe is separated, so that the production efficiency is greatly improved, the quality stability and consistency of the final product are ensured, and the production cost is reduced. And the overall production cost is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of injection mold technology, and in particular to a segmented core-pulling U-shaped bend injection mold. Background Technology

[0002] In the manufacturing of plastic parts, especially for tubular components with complex geometries, such as pipe bends, traditional mold design faces numerous challenges. With advancements in plastic materials science and the expansion of their applications, more and more traditional metal products are being replaced by lighter and more cost-effective plastic products. However, in specific application scenarios, such as when high mechanical strength or special structural requirements are needed, traditional mold design methods struggle to achieve efficient and high-quality production.

[0003] Specifically, when it comes to injection molds for U-shaped bends, the key issue lies in effectively solving the demolding problem of the inner hole in the middle arc segment. Conventional direct core-pulling methods cannot smoothly remove the plastic part from the mold, while traditional arc-shaped core-pulling methods are limited by the straight-edge structure of the holes at both ends and the overall size of the plastic part, making them impractical. Therefore, existing technologies often lead to low production efficiency, unstable product quality, and potentially increased production costs when dealing with such complex plastic parts. Utility Model Content

[0004] This invention aims to at least solve the technical problems existing in the prior art. To this end, this invention proposes a segmented core-pulling U-shaped bend injection mold, which can effectively solve the demolding problem in the prior art through segmented core pulling.

[0005] A segmented core-pulling U-shaped bend injection mold according to some embodiments of the present invention includes a panel and a base plate. A fixed template is provided at the bottom of the panel, and a fixed mold core is provided at the bottom of the fixed template. A movable template is provided at the top of the base plate, and a movable mold core is provided at the top of the movable template. The fixed mold core is located on top of the movable mold core. A U-shaped mold cavity is provided between the movable mold core and the fixed mold core. Fixed core-pulling blocks are provided at both openings of the mold cavity. Multiple movable core-pulling blocks are sequentially engaged inside the fixed core-pulling blocks. A driving mechanism is provided at the end of the movable template. A protective plate is provided at the top of the movable template. The protective plate has an internal movable mechanism. A first core-pulling base is provided, and the driving mechanism is connected to the first core-pulling base. A second core-pulling base and a fixing plate are movably arranged inside the protective plate. The fixing plate is arranged between the first core-pulling base and the second core-pulling base. A conformal spring is provided on both sides of the fixing plate. The conformal spring passes through the first core-pulling base, the fixed core-pulling block and a plurality of movable core-pulling blocks in sequence. A first fastening mechanism is provided between the first core-pulling base and the fixing plate. The bottom of the first core-pulling base is connected to two fixed core-pulling blocks. A second fastening mechanism is provided between the bottom of the fixing plate and the bottom of the second core-pulling base.

[0006] A segmented core-pulling U-shaped bend injection mold according to some embodiments of the present invention has at least the following beneficial effects:

[0007] This invention solves the problem of demolding the inner hole of the middle arc segment, which cannot be handled by traditional direct core pulling and arc core pulling methods, by introducing a segmented core pulling structure. It can first detach the straight edge part of the U-shaped bend and then detach the arc segment part of the U-shaped bend, so that the complex plastic parts can be efficiently and smoothly detached from the mold, which greatly improves production efficiency. The mold takes into account the structural strength requirements of the plastic parts, ensuring that the plastic parts will not be damaged or deformed during demolding, thereby ensuring the quality stability and consistency of the final product. The solution proposed by this invention simplifies the mold structure and effectively reduces the overall production cost.

[0008] According to some embodiments of the present invention, a segmented core-pulling U-shaped bend injection mold includes a first locking mechanism comprising a release rod and two movable blocks. The release rod is disposed at the end of the first core-pulling base away from the mold cavity. A receiving cavity is provided in the fixed plate, and springs are provided on both sides of the receiving cavity. The movable blocks are connected to the springs, and an abutment slope is provided at the end of the movable blocks. A protrusion is provided at the end of the release rod, and the protrusion is correspondingly disposed to the abutment slope. A positioning groove is provided in the middle of the movable blocks. A locking rod is provided at the section of the second core-pulling base near the first core-pulling base, and the locking rod extends into the positioning groove.

[0009] According to some embodiments of the present invention, a segmented core-pulling U-shaped bend injection mold is provided with a plurality of guide rods at one end of the second core-pulling base near the first core-pulling base, and the guide rods are sequentially inserted through the fixing plate and the first core-pulling base.

[0010] According to some embodiments of the present invention, a segmented core-pulling U-shaped bend injection mold includes a second locking mechanism comprising a rocker plate, a base provided on the top of the moving template, a rotating shaft provided on the base, the rocker plate being disposed on the top of the moving template, an abutment portion provided at one end of the rocker plate near the first core-pulling base, a first latch provided at the other end of the rocker plate, a first engaging portion provided at the bottom of the second core-pulling base, the first latch corresponding to the first engaging portion, a release groove provided at the bottom of the first core-pulling base, the release groove corresponding to the abutment portion, and an elastic pushing component provided on the top of the moving template, the elastic pushing component being located at the bottom of the abutment portion.

[0011] According to some embodiments of the present invention, a segmented core-pulling U-shaped bend injection mold has an elongated groove on the top of the moving template, a base is disposed in the middle of the groove, and a rocker plate is located in the groove.

[0012] According to some embodiments of the present invention, a segmented core-pulling U-shaped bend injection mold is provided with a third fastening mechanism between the top of the fixing plate and the top of the second core-pulling base.

[0013] According to some embodiments of the present invention, a segmented core-pulling U-shaped bend injection mold is provided. The third buckling mechanism includes an insert rod and a second buckle. The insert rod is disposed at one end of the first core-pulling base near the fixed plate. The end of the insert rod is provided with a second fastening part. The second buckle is disposed at one end of the second core-pulling base near the fixed plate. The end of the second core-pulling base near the fixed plate is provided with a fastening groove.

[0014] According to some embodiments of the present invention, a segmented core-pulling U-shaped bend injection mold is provided with a clearance portion at the edge of the fixing plate, the insert rod passes through the clearance portion, and one end of the second latch is rotatably connected to the second core-pulling base.

[0015] According to some embodiments of the present invention, a segmented core-pulling U-shaped bend injection mold is provided with a clearance groove on the inner wall of the protective plate, and the clearance groove is correspondingly provided with the second locking buckle.

[0016] According to some embodiments of the present invention, a segmented core-pulling U-shaped bend injection mold is provided with square iron on both sides of the top of the base plate, the movable template is provided on the top of the square iron, and an ejector mechanism is provided on the top of the base plate, the ejector mechanism being located at the bottom of the U-shaped mold cavity.

[0017] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0018] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0019] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0020] Figure 2 This is a schematic diagram of the structure of this utility model after the panel, template, and protective plate have been hidden.

[0021] Figure 3 This is a cross-sectional view of an embodiment of the present utility model.

[0022] Figure 4 This is a cross-sectional view of an embodiment of the present invention with the panel, template, and protective plate hidden.

[0023] Figure 5 This is a schematic diagram of the structure of the first core-pulling base and the fixing plate in an embodiment of the present utility model.

[0024] Figure 6 This is a schematic diagram of the movable stop and release rod in an embodiment of the present invention.

[0025] Figure 7 This is a schematic diagram of the U-shaped bend in an embodiment of the present invention.

[0026] Reference numerals: 1. Panel, 2. Base plate, 3. Fixed template, 4. Fixed mold core, 5. Moving template, 6. Moving mold core, 7. Mold cavity, 8. Fixed core-pulling block, 9. Movable core-pulling block, 10. Drive mechanism, 11. Protective plate, 12. First core-pulling base, 13. Second core-pulling base, 14. Fixed plate, 15. Conformal spring, 16. First latching mechanism, 17. Second latching mechanism, 18. Third latching mechanism, 19. Release rod, 20. Movable stop, 21. Receiving cavity, 22. Spring, 23. 24. Abutting slope, 25. Protrusion, 26. Positioning groove, 27. Locking rod, 28. Notch, 29. Guide rod, 30. Rocker, 31. Base, 32. Rotating shaft, 33. Abutting part, 34. First latch, 35. First engaging part, 36. Release groove, 37. Elastic pushing component, 38. Groove, 39. Insert rod, 40. Second latch, 41. Second engaging part, 42. Engaging groove, 43. Alternating part, 44. Alternating groove, 45. Square iron, 46. Ejector mechanism, 47. Water channel, 48. Return spring. Detailed Implementation

[0027] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain this utility model, and should not be construed as limiting this utility model.

[0028] In the description of this utility model, it should be understood that the orientation descriptions, such as up, down, left, right, front, and back, are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the module or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0029] In the description of this utility model, the use of "first" and "second" is only for the purpose of distinguishing technical features and should not be construed as indicating or implying relative importance or implicitly indicating the number of technical features or the order of the technical features.

[0030] In the description of this utility model, unless otherwise explicitly defined, terms such as "setting," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this utility model in conjunction with the specific content of the technical solution.

[0031] An embodiment of the present invention discloses a segmented core-pulling U-shaped bend injection mold, such as... Figures 1-7As shown, the device includes a panel 1 and a base plate 2. A fixed template 3 is provided at the bottom of the panel 1, and a fixed mold core 4 is provided at the bottom of the fixed template 3. A movable template 5 is provided at the top of the base plate 2, and a movable mold core 6 is provided at the top of the movable template 5. The fixed mold core 4 is located on top of the movable mold core 6. A U-shaped mold cavity 7 is provided between the movable mold core 6 and the fixed mold core 4. A fixed core-pulling block 8 is provided at each of the two openings of the mold cavity 7. Multiple movable core-pulling blocks 9 are sequentially engaged inside the fixed core-pulling blocks 8. A driving mechanism 10 is provided at the end of the movable template 5. A protective plate 11 is provided at the top of the movable template 5. A first core-pulling base 12 is movably disposed inside the protective plate 11. The driving mechanism 10 and the first core-pulling base 12 are connected. A core-pulling base 12 is correspondingly provided. A second core-pulling base 13 and a fixing plate 14 are fixedly provided inside the protective plate 11. The fixing plate 14 is located between the first core-pulling base 12 and the second core-pulling base 13. A conformal spring 15 is provided on both sides of the fixing plate 14. The conformal spring 15 passes through the first core-pulling base 12, the fixed core-pulling block 8 and a plurality of movable core-pulling blocks 9 in sequence. A first fastening mechanism 16 is provided between the first core-pulling base 12 and the fixing plate 14. The bottom of the first core-pulling base 12 is connected to two fixed core-pulling blocks 8. A second fastening mechanism 17 is provided between the bottom of the fixing plate 14 and the bottom of the second core-pulling base 13.

[0032] This invention solves the demolding problem of the inner hole in the middle arc segment, which cannot be handled by traditional direct core pulling and arc core pulling methods, by introducing a segmented, multi-stage core pulling structure. This allows complex plastic parts to be efficiently and smoothly removed from the mold, greatly improving production efficiency. The mold specifically considers the structural strength requirements of the plastic parts, ensuring that no damage or deformation occurs during demolding, thereby guaranteeing the quality stability and consistency of the final product. The solution proposed in this invention simplifies the mold structure and effectively reduces overall production costs.

[0033] The core-pulling steps in this embodiment are as follows: First, with the first snap-fit ​​assembly 16 and the second snap-fit ​​assembly 17 in an active state, the drive mechanism 10 drives the first core-pulling base 12 away from the mold cavity 7, while the positions of the fixed plate 14 and the second core-pulling base 13 remain unchanged. The displacement of the first core-pulling base 12 causes the two fixed core-pulling blocks 8 to separate from the movable core-pulling blocks 9. Subsequently, the first snap-fit ​​assembly 16 becomes ineffective, while the second snap-fit ​​assembly 17 remains active. The drive mechanism 10 drives the first core-pulling base 12 to continue moving away from the mold cavity 7. The first core-pulling base 12 abuts against the fixed plate 14, and the first core-pulling base 12 drives the fixed plate 14 to move together. The conformal spring 15 drives multiple movable core-pulling blocks 9 to be partially pulled outward. The multiple movable core-pulling blocks 9 disengage from each other and the core-pulling is completed. After the core-pulling and ejection of the object, the core is reset to prepare for the next core-pulling.

[0034] It is understood that the fixed core-pulling block 8 corresponds to the straight edge of the U-shaped pipe, the movable core-pulling block 9 corresponds to the arc segment of the U-shaped pipe, and the driving mechanism 10 is driven by a hydraulic cylinder.

[0035] This embodiment describes a segmented core-pulling U-shaped bend injection mold. The first locking mechanism 16 includes a release rod 19 and two movable blocks 20. The release rod 19 is located at the end of the first core-pulling base 12 away from the mold cavity 7. The fixed plate 14 has a receiving cavity 21, and springs 22 are provided on both sides of the receiving cavity 21. The movable blocks 20 are connected to the springs 22. The end of the movable blocks 20 has an abutting slope 23. The end of the release rod 19 has a protrusion 24, which is correspondingly provided with the abutting slope 23. The middle of the movable blocks 20 has a positioning groove 25. The second core-pulling base 13 has a locking rod 26 near the first core-pulling base 12, and the locking rod 26 extends into the positioning groove 25. Specifically, before the core pulling begins, the locking rod 26 extends into the positioning groove 25. The movable stop 20, under the elastic force of the spring 22, keeps the inner wall of the positioning groove 25 in continuous contact with the locking rod 26, preventing the fixed plate 14 from moving. After the core pulling begins, the drive mechanism 10 moves the first core-pulling base 12, causing the release rod 19 to move towards the positioning block. The protrusion 24 pushes against the abutting slope 23 of the movable stop 20, causing the movable stop 20 to displace inwards, thus removing the inner wall of the positioning groove 25 from contact with the locking rod 26. At this point, the fixed plate 14 can move. It is understood that the above structure is simple; the movement of the first core-pulling base 12 pulls the fixed core-pulling block 8, separating it from the movable core-pulling block 9.

[0036] It is understandable that the end of the locking rod 26 is provided with a notch 27, and the positioning groove 25 cooperates with the notch 27. When the first latching combination mechanism 16 is activated, the inner wall of the positioning groove 25 abuts against the locking rod 26.

[0037] This embodiment describes a segmented core-pulling U-shaped bend injection mold. The second core-pulling base 13, near the end of the first core-pulling base 12, is provided with multiple guide rods 28. These guide rods 28 are sequentially inserted through the fixed plate 14 and the first core-pulling base 12. Specifically, this arrangement allows the first core-pulling base 12 and the fixed plate 14 to move along the guide rods 28, ensuring the stability of demolding.

[0038] This embodiment describes a segmented core-pulling U-shaped bend injection mold. The second fastening mechanism 17 includes a rocker arm 29. A base 30 is provided on the top of the moving template 5, and a rotating shaft 31 is provided on the base 30. The rocker arm 29 is located on the top of the moving template 5. An abutment portion 32 is provided at one end of the rocker arm 29 near the first core-pulling base 12, and a first latch 33 is provided at the other end of the rocker arm 29. A first fastening portion 34 is provided at the bottom of the second core-pulling base 13, and the first latch 33 is correspondingly provided with the first fastening portion 34. A release groove 35 is provided at the bottom of the first core-pulling base 12, and the release groove 35 is correspondingly provided with the abutment portion 32. An elastic pushing component 36 is provided on the top of the moving template 5, and the elastic pushing component 36 is located at the bottom of the abutment portion 32. Specifically, in the initial state, the first latch 33 of the first core-pulling base 12 is engaged with the first engaging part 34. At this time, the position of the second core-pulling base 13 is fixed and cannot be moved. As the first core-pulling base moves, the release groove 35 moves to one end of the abutment part 32. Under the operation of the elastic pushing component 36, the rocker plate 29 bounces up one end of the abutment part 32, and the first latch 33 disengages from the first engaging part 34, so that the position of the second core-pulling base 13 is no longer fixed. The above structure is simple and does not require additional driving components to control the activation and deactivation of the second latching mechanism 17.

[0039] This embodiment describes a segmented core-pulling U-shaped bend injection mold. The top of the moving template 5 has an elongated groove 37, the base 30 is located in the middle of the groove 37, and the rocker arm 29 is located within the groove 37. Specifically, this design saves valuable space inside the mold and helps to create a more compact mold structure. The groove 37 provides a stable mounting foundation for the base 30, ensuring that it will not shift or shake during operation.

[0040] In this embodiment, a segmented core-pulling U-shaped bend injection mold is provided with a third locking mechanism 18 between the top of the fixed plate 14 and the top of the second core-pulling base 13. Specifically, when the second locking mechanism 18 fails, the movable core-pulling block 9 has been basically pulled out from the arc segment of the bend. The third locking mechanism 18 allows for linear core-pulling, ensuring stable core-pulling.

[0041] This embodiment describes a segmented core-pulling U-shaped bend injection mold. The third locking mechanism 18 includes an insertion rod 38 and a second latch 39. The insertion rod 38 is located at one end of the first core-pulling base 12 near the fixed plate 14, and a second fastening part 40 is provided at the end of the insertion rod 38. The second latch 39 is located at one end of the second core-pulling base 13 near the fixed plate 14, and a fastening groove 41 is provided at the end of the second core-pulling base 13 near the fixed plate 14. Specifically, when the first core-pulling base 12 and the fixed plate 14 move together, the insertion rod 38 is inserted into the second latch 39. At this time, the second locking mechanism 18 also simultaneously fails, causing the first core-pulling base 12, the fixed plate 14, and the second core-pulling base 13 to move together.

[0042] Understandably, as the drive mechanism works, the second latching combination mechanism 17 changes from active to inactive, and the third latching combination mechanism 18 changes from inactive to active. The first core-pulling base 12, the fixed plate 14, and the second core-pulling base 13 move synchronously, causing the fixed core-pulling block 8 and the movable core-pulling block 9 to completely pull the core.

[0043] The reset steps in this embodiment are as follows: the drive mechanism 10 drives the first core-pulling base 12 and the second core-pulling base 13 to move synchronously, and the conformal spring 15 drives the fixing plate 14 to move synchronously until the third buckle assembly 18 fails, the second buckle assembly 17 mechanism changes from failure to effectiveness, and the second core-pulling base 13 is fixed; the drive mechanism drives the first core-pulling base 12 to continue to move, and the conformal spring 15 drives the fixing plate 14 to move synchronously until the first buckle assembly 16 changes from failure to effectiveness, and the first core-pulling base 12, the fixing plate 14, the movable core-pulling block 9 and the fixed core-pulling block 8 are reset.

[0044] This embodiment describes a segmented core-pulling U-shaped bend injection mold. The fixed plate 14 has a clearance portion 42 along its edge, and the insert rod 38 passes through the clearance portion 42. One end of the second latch 39 is rotatably connected to the second core-pulling base 13. Specifically, the above structure is compact, with two insert rods 38, located on opposite sides of the first core-pulling base 12.

[0045] This embodiment describes a segmented core-pulling U-shaped bend injection mold. The inner wall of the protective plate 11 is provided with a clearance groove 43, which corresponds to the second latch 39. Specifically, the clearance groove 43 allows the second latch 39 to rotate within a certain range to facilitate the insertion of the rod 38 into the locking groove 41. At the same time, during resetting, it allows the rod 38 to disengage, providing a certain amount of space for movement.

[0046] This embodiment describes a segmented core-pulling U-shaped bend injection mold. Square iron blocks 44 are provided on both sides of the top of the base plate 2. The moving template 5 is located on top of the square iron blocks 44. An ejector mechanism 45 is provided on the top of the base plate 2, and the ejector mechanism 45 is located at the bottom of the U-shaped mold cavity 7. Specifically, the above arrangement can eject the injection-molded U-shaped bend. The specific structural arrangement of the ejector mechanism 45 adopts existing technology and will not be described in detail here.

[0047] It is understood that both the fixed mold core 4 and the moving mold core 6 are provided with water channels 46 to meet the cooling requirements of the mold.

[0048] This invention, through the first, second, and third buckle combination mechanism, ensures the accurate movement of each component at different stages. The step-by-step and orderly operation method guarantees the accuracy and reliability of the entire demolding process. During the core-pulling process, the conformal spring design not only provides the necessary elastic support but also ensures a smooth transition between each movable core-pulling block, avoiding damage or deformation of the plastic part caused by sudden movements. The core-pulling method adopts a step-by-step execution approach, with each step corresponding to a specific mechanical structure change. This helps reduce human intervention, speeds up the production pace, improves overall work efficiency, reduces unnecessary energy consumption, and minimizes wear on the mold and other equipment. In the long run, this setup helps reduce maintenance costs and extend the service life of the equipment.

[0049] It is understandable that a reset spring 47 is provided between the first core-pulling base 12 and the fixing plate to meet the reset requirements.

[0050] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A segmented core-pulling U-shaped bend injection mold, characterized in that: The system includes a panel and a base plate. A fixed template is located at the bottom of the panel, and a fixed mold core is located at the bottom of the fixed template. A movable template is located at the top of the base plate, and a movable mold core is located at the top of the movable template. The fixed mold core is located on top of the movable mold core. A U-shaped cavity is provided between the movable mold core and the fixed mold core. Fixed core-pulling blocks are provided at both openings of the cavity. Multiple movable core-pulling blocks are sequentially engaged inside the fixed core-pulling blocks. A driving mechanism is provided at the end of the movable template. A protective plate is provided at the top of the movable template. A first core-pulling base is movably mounted inside the protective plate. The driving mechanism… Connected to the first core-pulling base, the protective plate is movably provided with a second core-pulling base and a fixing plate. The fixing plate is disposed between the first core-pulling base and the second core-pulling base. Conformal springs are provided on both sides of the fixing plate. The conformal springs are sequentially inserted through the first core-pulling base, the fixed core-pulling block, and a plurality of movable core-pulling blocks. A first fastening mechanism is provided between the first core-pulling base and the fixing plate. The bottom of the first core-pulling base is connected to two fixed core-pulling blocks. A second fastening mechanism is provided between the bottom of the fixing plate and the bottom of the second core-pulling base.

2. The U-shaped bend injection mold for segmented core pulling according to claim 1, characterized in that: The first locking mechanism includes a release rod and two movable blocks. The release rod is located at the end of the first core-pulling base away from the mold cavity. A receiving cavity is provided inside the fixed plate. Springs are provided on both sides of the receiving cavity. The movable blocks are connected to the springs. An abutment slope is provided at the end of the movable blocks. A protrusion is provided at the end of the release rod. The protrusion is correspondingly provided to the abutment slope. A positioning groove is provided in the middle of the movable blocks. A locking rod is provided at the section of the second core-pulling base near the first core-pulling base. The locking rod extends into the positioning groove.

3. The U-shaped bend injection mold for segmented core pulling according to claim 2, characterized in that: The second core-pulling base has multiple guide rods at one end near the first core-pulling base, and the guide rods are sequentially inserted through the fixing plate and the first core-pulling base.

4. The U-shaped bend injection mold for segmented core pulling according to claim 1, characterized in that: The second buckle assembly includes a rocker plate. A base is provided on the top of the moving template, and a rotating shaft is provided on the base. The rocker plate is located on the top of the moving template. An abutment portion is provided at one end of the rocker plate near the first core-pulling base, and a first latch is provided at the other end of the rocker plate. A first engaging portion is provided at the bottom of the second core-pulling base, and the first latch is correspondingly provided to the first engaging portion. A release groove is provided at the bottom of the first core-pulling base, and the release groove is correspondingly provided to the abutment portion. An elastic pushing component is provided on the top of the moving template, and the elastic pushing component is located at the bottom of the abutment portion.

5. The U-shaped bend injection mold for segmented core pulling according to claim 4, characterized in that: The top of the moving template is provided with a long strip-shaped groove, the base is disposed in the middle of the groove, and the rocker plate is located in the groove.

6. The U-shaped bend injection mold for segmented core pulling according to claim 1, characterized in that: A third fastening assembly mechanism is provided between the top of the fixing plate and the top of the second core-pulling base.

7. The U-shaped bend injection mold for segmented core pulling according to claim 6, characterized in that: The third buckle assembly includes a plug rod and a second latch. The plug rod is located at one end of the first core-pulling base near the fixed plate. The end of the plug rod is provided with a second fastening part. The second latch is located at one end of the second core-pulling base near the fixed plate. The end of the second core-pulling base near the fixed plate is provided with a fastening groove.

8. The U-shaped bend injection mold for segmented core pulling according to claim 7, characterized in that: The edge of the fixing plate is provided with a clearance part, the insertion rod passes through the clearance part, and one end of the second latch is rotatably connected to the second core-pulling base.

9. A segmented core-pulling U-shaped bend injection mold according to claim 8, characterized in that: The inner wall of the protective plate is provided with a clearance groove, which is correspondingly provided with the second latch.

10. A segmented core-pulling U-shaped bend injection mold according to claim 1, characterized in that: Square irons are provided on both sides of the top of the base plate, the moving template is provided on the top of the square irons, and an ejector mechanism is provided on the top of the base plate. The ejector mechanism is located at the bottom of the U-shaped mold cavity.

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