Forming block anti-dislocation structure for forming die

Abstract

The invention is suitable for the technical field of molds, and provides a forming block dislocation prevention structure for a forming mold, the forming mold comprises a first mold and a second mold, the first mold and the second mold are arranged in a matched mode, forming block structures are arranged on the first mold and the second mold, and positioning key structures are arranged at the bottoms of the forming block structures; vertical positioning keys are further arranged between the side wall attaching faces of the adjacent forming block structures and are configured to enable the forming block structures to be integrated into a rigid whole, dislocation between the forming block structures is prevented, through a multiple positioning key mechanism, namely, the bottom positioning key is reserved to provide a basic positioning effect, meanwhile, the side wall vertical positioning keys are additionally arranged, and the forming block structures are more stable. The lower die male die forming blocks and the upper die male die forming blocks cooperate to tightly connect the lower die male die forming blocks into a rigid whole, so that the forming blocks cannot move relatively in the stamping process, and stable alignment is kept in long-term large-batch production.

Description

Technical Field

[0001] This invention belongs to the field of mold technology, and in particular relates to a structure for preventing misalignment of molding blocks for molding molds. Background Technology

[0002] With the continuous improvement of emission and safety (crash) standards in the automotive industry, the demand for lightweight vehicles is becoming increasingly strong worldwide. To reduce weight while improving the crash performance of automotive body-in-white components, the industry's mature lightweight technology is hot stamping. This involves heating manganese-boron steel sheets with an initial tensile strength of 500-700 MPa to an austenitic state, then using a clamping device to remove the high-temperature blank from the furnace and place it in the corresponding mold cavity for rapid stamping and forming. The blank is then held under pressure and quenched, followed by rapid cooling to obtain parts with a uniform martensitic structure and a tensile strength reaching 1500-2000 MPa.

[0003] Some parts have complex shapes and are not only tall but also have large height differences. A typical part is the rear longitudinal beam (as shown below). Figure 1 As shown in the figure, during the mold development process for such parts, it is often encountered that after the mold assembly and debugging are qualified, the parts are qualified during small-batch production, but the parts become unstable after mass production, and some parts exceed the tolerance and fail to meet the requirements. It is necessary to reassemble the mold and debug the parts again to make them qualified.

[0004] After investigation and analysis, the cause was found to be the complex shape of these parts, their significant height, and large height differences. This resulted in a high punch forming block in the lower die, causing the bottom locating key to quickly become unstable and fail after mass production. Furthermore, the complex shape led to uneven stress distribution, causing misalignment of the punch forming block in the lower die. Ultimately, this resulted in unstable parts exceeding tolerances and being scrapped during mass production. To solve these problems, designing a structure to prevent misalignment of the forming block in the forming mold is essential. Summary of the Invention

[0005] This invention provides a structure to prevent misalignment of molding blocks for molding dies, in order to solve the above-mentioned problems in the prior art.

[0006] This invention is implemented as follows: a molding block anti-misalignment structure for a molding die, wherein the molding die includes a first die and a second die, which are configured to cooperate with each other. Each of the first and second diees has a molding block structure. The bottom of each molding block structure is provided with a positioning key structure, and a vertical positioning key is also provided between the sidewall contact surfaces of adjacent molding block structures. The vertical positioning key is configured to integrate the multiple molding block structures into a rigid whole, preventing misalignment between the molding block structures. Each molding block structure includes a first lower die punch molding block and a second lower die punch molding block. The first lower die punch molding block is disposed on the first die, and the second lower die punch molding block is disposed on the second die.

[0007] As a preferred embodiment, the first mold and the second mold are hot stamping forming molds used to form high-strength steel plate parts.

[0008] As a preferred embodiment, the vertical positioning key is disposed between the mating surfaces of the two inserts and is integrally formed with or separately assembled with the molding block structure.

[0009] As a preferred embodiment, the forming block structure is made of steel and is suitable for cold stamping or hot stamping processes. The arrangement of the vertical positioning keys corresponds to the height difference area of ​​the part shape to optimize the force distribution.

[0010] As a preferred embodiment, the system further includes a first mounting bracket and a second mounting bracket. The first mold and the second mold are arranged opposite to each other, with the first mold located above the second mold. The first mold is fixedly connected to the first mounting bracket, and the second mold is fixedly connected to the second mounting bracket. Both ends of the bottom of the second mounting bracket are fixedly mounted with supports, and each support has multiple mounting holes.

[0011] As a preferred embodiment, the second mounting bracket has through openings on both sides, the through openings penetrating the second mounting bracket, and each through opening has a movable component that slides up and down on the through opening. Each movable component has a guide groove at both ends of its top. Conical blocks are fixedly installed at the four corners of the bottom of the first mounting bracket. The conical blocks can be moved into the guide grooves, and the guide grooves are used to guide the conical blocks.

[0012] As a preferred embodiment, each of the movable parts has a base block fixedly installed at its bottom, the lower end of the base block passes through the through-hole, and an elastic element is fixedly connected to each base block. The other end of each elastic element is fixedly connected to the second mounting bracket.

[0013] As a preferred embodiment, the second mounting bracket is equipped with an adjustment mechanism, which is configured to cooperate with four base blocks and is used to adjust the height of the guide groove.

[0014] As a preferred embodiment, the adjustment mechanism includes two spaced-apart support plates, each fixedly connected to the bottom of the second mounting frame. A rotating shaft is rotatably mounted between the two support plates, with eccentric wheels fixedly mounted at both ends of the shaft. The shaft is mounted at the eccentricity of the eccentric wheels, with one end of the shaft passing through one of the support plates. Gears are connected to the ends of the shafts via screws. An electric telescopic rod is fixedly mounted at the bottom of the second mounting frame, with a rod member connected to the output end of the electric telescopic rod via screws. A rack portion is integrally formed on the rod member, with gears meshing at both ends of the rack portion.

[0015] As a preferred embodiment, the electric telescopic rod has a self-locking feature.

[0016] Compared with related technologies, the anti-misalignment structure for molding blocks of molding dies provided by the present invention has the following beneficial effects: The multi-positioning key mechanism retains the bottom positioning key to provide basic positioning, while adding a vertical positioning key on the side wall. The two work together to tightly connect multiple lower die punch forming blocks into a rigid whole, so that the forming blocks cannot move relative to each other during the stamping process and maintain stable alignment in long-term mass production.

[0017] Side wall locating keys enhance overall rigidity, preventing misalignment of the forming blocks and eliminating misalignment steps. This minimizes dimensional fluctuations in parts during mass production, significantly improving the part yield rate compared to the original design. It effectively reduces production interruptions and readjustment frequency, minimizing the impact of forming block misalignment on the production process and ensuring production continuity. The increased effective contact area of ​​the locating keys disperses localized stress, reducing wear on the mold forming blocks and extending mold life. This allows the mold to maintain consistent precision during mass production, ensuring stable part quality. The anti-misalignment design directly eliminates out-of-tolerance step issues, significantly reducing part scrap rates and material waste. It is particularly suitable for producing complex parts such as rear longitudinal beams, improving overall production efficiency and meeting the forming requirements of complex parts.

[0018] The solution can be flexibly applied to molds with various complex shapes. The length and position of the side wall positioning keys can be adjusted according to the step difference of the parts, exhibiting strong versatility and adaptability to multiple production scenarios. By reducing scrap and debugging time, it effectively reduces production costs and improves the economic efficiency of production.

[0019] By setting a conical block at the bottom of the first mounting frame and opening a guide groove at the top of the movable part, the conical block enters the guide groove when the mold is closed. Utilizing the self-locking property of the conical surface, the first mounting frame and the first mold are guided to move smoothly, achieving precise positioning of the upper and lower molds, ensuring consistent mold closing positions each time, improving mold closing quality, and guaranteeing product molding accuracy.

[0020] During the mold closing process, if there is a positional deviation between the upper and lower molds, the guide groove can guide the conical block, and then guide the first mounting bracket and the first mold to automatically correct the positional deviation without manual intervention, thereby improving production efficiency and reducing the product defect rate caused by mold positional deviation.

[0021] The adjustment mechanism moves the rod via an electric telescopic rod, and uses the meshing of a rack and pinion to rotate the shaft, which in turn drives the eccentric wheel to move eccentrically, pushing the base block and moving parts up and down to adjust the height of the guide groove. This design can meet the installation and closing requirements of different molds, enhancing the versatility and flexibility of the equipment and adapting to various production scenarios.

[0022] During mold opening, the elastic element releases its elastic potential energy, generating an upward elastic force that pushes the movable part upward. The movable part applies an upward force to the conical block through the guide groove, causing the first mounting bracket and the first mold to move upward, achieving rapid separation of the upper and lower molds. This facilitates workpiece removal and improves production efficiency. The elastic force of the elastic element not only separates the upper and lower molds during mold opening but also acts as an ejector, pushing the formed workpiece out of the mold, further improving demolding efficiency, reducing manual operation, and lowering labor intensity. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the structure of a typical component, the rear longitudinal beam, in the background art. Figure 2 This is a schematic diagram of the structure of the first mold in this invention; Figure 3 This is a schematic diagram of the structure of the second mold in this invention; Figure 4 This is an enlarged structural diagram of the first mounting bracket, the second mounting bracket, the first mold, and the second mold in this invention. Figure 1 ; Figure 5 This is an enlarged structural diagram of the first mounting bracket, the second mounting bracket, the first mold, and the second mold in this invention. Figure 2 ; Figure 6 This is an enlarged schematic diagram of a portion of the structure at the second mounting bracket in this invention; Figure 7 This is an exploded view of the movable component and the base block in this invention; Figure 8 For the present invention Figure 6 Enlarged structural diagram at point A in the middle.

[0024] In the diagram: 101, First mold; 102, Second mold; 1, Vertical positioning key; 2, First lower mold punch forming block; 3, Second lower mold punch forming block; 4, First mounting bracket; 5, Second mounting bracket; 6, Through hole; 7, Movable part; 8, Guide groove; 9, Conical block; 10, Bracket; 11, Base block; 12, Elastic part; 13, Adjustment mechanism; 14, Support plate; 15, Rotating shaft; 16, Eccentric wheel; 17, Gear; 18, Electric telescopic rod; 19, Rod; 20, Rack section. Detailed Implementation

[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used herein in the specification of the application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application; the terms "comprising" and "having," and any variations thereof, in the specification, claims, and foregoing drawings of this application are intended to cover non-exclusive inclusion. The terms "first," "second," etc., in the specification, claims, or foregoing drawings of this application are used to distinguish different objects, not to describe a particular order.

[0026] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.

[0027] A preferred embodiment of the anti-misalignment structure for molding blocks of the molding die provided by the present invention is as follows: Figures 1 to 3 As shown: A molding block anti-misalignment structure for a molding die, the molding die including a first mold 101 and a second mold 102, the first mold 101 and the second mold 102 are configured to cooperate, and both the first mold 101 and the second mold 102 are provided with molding block structures, the bottom of the molding block structure is provided with a positioning key structure, and a vertical positioning key 1 is also provided between the side wall contact surfaces of adjacent molding block structures. The vertical positioning key 1 is configured to integrate multiple molding block structures into a rigid whole to prevent misalignment between the molding block structures. The molding block structure includes a first lower mold punch molding block 2 and a second lower mold punch molding block 3, the first lower mold punch molding block 2 is provided on the first mold 101, and the second lower mold punch molding block 3 is provided on the second mold 102.

[0028] The first mold 101 and the second mold 102 are hot stamping forming molds used to form high-strength steel plate parts. A vertical positioning key 1 is positioned between the mating surfaces of the two inserts and is integrally formed with the forming block structure or assembled separately. The forming block structure is made of steel and is suitable for cold stamping or hot stamping processes. The arrangement of the vertical positioning key 1 corresponds to the height difference area of ​​the part shape to optimize the force distribution.

[0029] In this embodiment, in addition to the conventional design of positioning keys at the bottom, positioning keys are also designed on the side walls where the steel blocks fit together, and they are made as long as possible to increase the effective contact area, so that the entire lower die punch is integrated into a rigid whole, and there will be no more misalignment between the lower die punch forming blocks that would cause steps to occur and lead to parts being scrapped due to exceeding tolerances.

[0030] The core of this anti-misalignment design lies in ensuring stable alignment of the lower die punch forming block during long-term, high-volume production through a multi-positioning key mechanism. The bottom positioning key is retained and follows the conventional design, with a positioning key set at the bottom of the forming block to provide basic positioning.

[0031] New vertical locating keys are added to the sidewalls where adjacent steel blocks meet. These sidewall locating keys are designed to be as long as possible to increase the effective contact area. Through the synergistic action of the bottom and sidewall locating keys, multiple lower die punch forming blocks are tightly connected to form a rigid whole. The sidewall locating keys resist lateral forces and prevent horizontal misalignment caused by uneven force distribution; the bottom locating keys bear the vertical load. This design prevents the forming blocks from moving relative to each other during stamping, thus eliminating misalignment steps.

[0032] During the die stamping process, the high-temperature blank is placed in the die cavity, stamped, and then held under pressure for quenching. The side wall locating keys provide continuous constraint between the mating surfaces of the formed blocks, maintaining alignment even under high-volume cyclic stress and ensuring dimensional consistency of the parts.

[0033] Sidewall locating keys enhance overall rigidity, preventing misalignment of molded blocks and minimizing dimensional fluctuations in parts during mass production. Compared to the original design, the part yield rate is significantly improved, reducing production interruptions and the frequency of readjustment. The increased effective contact area of ​​the locating keys disperses localized stress and reduces wear. The mold maintains precision during mass production. The anti-misalignment design directly eliminates step-out tolerance issues, significantly reducing part scrap rates. It is particularly suitable for complex parts such as rear longitudinal beams, improving overall production efficiency. The solution can be flexibly applied to molds with different complex shapes; the length and position of the sidewall locating keys can be adjusted according to part step differences, exhibiting strong versatility. By reducing scrap and adjustment time, production costs are lowered.

[0034] In a further preferred embodiment of the present invention, such as Figures 1 to 8 As shown: It also includes a first mounting bracket 4 and a second mounting bracket 5. The first mold 101 and the second mold 102 are arranged opposite to each other and the first mold 101 is located above the second mold 102. The first mold 101 is fixedly connected to the first mounting bracket 4 and the second mold 102 is fixedly connected to the second mounting bracket 5. Both ends of the bottom of the second mounting bracket 5 are fixedly mounted with brackets 10, and each bracket 10 has multiple mounting holes.

[0035] The second mounting bracket 5 has through openings 6 on both sides, and the through openings 6 pass through the second mounting bracket 5. Each through opening 6 has a movable part 7, which slides up and down on the through opening 6. Each of the top ends of the movable part 7 has a guide groove 8. Each of the four corners of the bottom of the first mounting bracket 4 has a conical block 9 fixedly installed. The conical block 9 can be moved into the guide groove 8, and the guide groove 8 is used to guide the conical block 9.

[0036] Each movable part 7 has a base block 11 fixedly installed at its bottom. The lower end of the base block 11 passes through the through hole 6. Each base block 11 is fixedly connected to an elastic element 12. The other end of each elastic element 12 is fixedly connected to the second mounting bracket 5.

[0037] An adjustment mechanism 13 is installed on the second mounting bracket 5. The adjustment mechanism 13 is configured to cooperate with four base blocks 11 and is used to adjust the height of the guide groove 8. The adjustment mechanism 13 includes two spaced-apart support plates 14. The support plates 14 are fixedly connected to the bottom of the second mounting bracket 5. A rotating shaft 15 is rotatably installed between the two support plates 14. Eccentric wheels 16 are fixedly installed at both ends of the rotating shaft 15. The rotating shaft 15 is installed at the eccentric position of the eccentric wheels 16. One end of the rotating shaft 15 passes through one side of the support plate 14. The ends of the rotating shaft 15 are connected to gears 17 by screws. An electric telescopic rod 18 is fixedly installed at the bottom of the second mounting bracket 5. The output end of the electric telescopic rod 18 is connected to a rod 19 by screws. A rack portion 20 is integrally formed on the rod 19. The two ends of the rack portion 20 are engaged with the gears 17 on both sides.

[0038] During mold closing, positioning, and automatic correction, in the initial state, the first mold 101 is fixed on the first mounting bracket 4, and the second mold 102 is fixed on the second mounting bracket 5. The movable part 7 is in a certain initial position under the action of the elastic element 12, and the guide groove 8 is also at the corresponding height. At this time, the conical block 9 at the bottom of the first mounting bracket 4 and the guide groove 8 at the top of the movable part 7 are in relative positions, but not fully engaged. During the mold closing process, the first mounting bracket 4 drives the first mold 101 to move downwards, and the conical block 9 gradually approaches the guide groove 8. As the first mounting bracket 4 continues to move downwards, the conical block 9 enters the guide groove 8. Due to the self-locking characteristic of the conical surface, if there is a positional deviation between the upper and lower molds during the process of the conical block 9 entering the guide groove 8, the guide groove 8 will guide the conical block 9, thereby guiding the first mounting bracket 4 and the first mold 101 to move smoothly, automatically correcting the positional deviation between the upper and lower molds, achieving precise positioning of the upper and lower molds, and ensuring consistent mold closing positions each time.

[0039] When adjusting the height of the guide groove, the adjustment mechanism is activated. When the height of the guide groove 8 needs to be adjusted to adapt to different situations, the electric telescopic rod 18 is activated. The electric telescopic rod 18 has self-locking properties, ensuring positional stability during and after adjustment. The output end of the electric telescopic rod 18 drives the rod 19 to move. The rack portion 20 on the rod 19 meshes with the gear 17, thereby driving the gear 17 to rotate. The gear 17 is fixed to the end of the rotating shaft 15, so the rotation of the gear 17 will drive the rotating shaft 15 to rotate.

[0040] When the shaft 15 rotates, the eccentric wheel 16 will move eccentrically, thereby pushing the base block 11 to move up and down. Since the movable part 7 is fixed on the base block 11, the movable part 7 will also slide up and down, thereby adjusting the height of the guide groove 8 to meet different mold installation and mold closing requirements.

[0041] During mold opening and ejection, after mold closing, when it is necessary to open the mold and remove the workpiece, the elastic element 12 comes into play. During mold opening, the elastic element 12 releases its elastic potential energy, generating an upward elastic force that pushes the movable part 7 upward. The movable part 7 applies an upward force to the conical block 9 through the guide groove 8, thereby driving the first mounting bracket 4 and the first mold 101 upward, achieving rapid separation of the upper and lower molds, facilitating workpiece removal, and realizing demolding. During the mold opening process, the elastic force of the elastic element 12 not only separates the upper and lower molds but also acts as an ejector, pushing the formed workpiece out of the mold, further improving demolding efficiency.

[0042] The electric telescopic rod 18 has a self-locking function. When adjusting the height of the guide groove 8 using the adjusting mechanism 13, the self-locking function of the electric telescopic rod 18 ensures that its output end, after moving the rod 19 to the designated position, will not be displaced due to external factors (such as slight vibration or external force). During adjustment, the self-locking function of the electric telescopic rod 18 prevents instability or rebound of its own extension and retraction from affecting the operation of the entire adjusting mechanism.

[0043] It is worth noting that the circuits, electronic components, and modules involved in this invention are all existing technologies, which can be fully implemented by those skilled in the art, and need not be elaborated upon. The content protected by this invention does not involve improvements to the software and methods.

[0044] It should be understood that the disclosed apparatus can be implemented in other ways, given the several embodiments provided in this application. For example, the apparatus embodiments described above are merely illustrative; the division of units described above is only a logical functional division, and in actual implementation, there may be other division methods. For example, multiple units or components may be combined or integrated into another system, or some features may be ignored or not executed. Furthermore, the coupling or communication connections shown or discussed may be through some interfaces; the indirect coupling or communication connections between devices or units may be telecommunications or other forms.

[0045] The above embodiments are only used to illustrate the technical solutions of the present invention, and are not intended to limit the scope of protection of the invention. Obviously, the described embodiments are only some embodiments of the present invention, not all embodiments. Based on these embodiments, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art can still combine, add, delete, or otherwise adjust the features of the various embodiments of the present invention according to the circumstances without conflict or creative effort, thereby obtaining different technical solutions that do not fundamentally depart from the concept of the present invention. These technical solutions also fall within the scope of protection of the present invention.

Claims

1. A structure for preventing misalignment of molding blocks in a molding die, characterized in that, The molding die includes a first die (101) and a second die (102). The first die (101) and the second die (102) are configured to cooperate. The first die (101) and the second die (102) are each provided with a molding block structure. The bottom of the molding block structure is provided with a positioning key structure. A vertical positioning key (1) is also provided between the side wall contact surfaces of the adjacent molding block structures. The vertical positioning key (1) is configured to integrate the multiple molding block structures into a rigid whole to prevent misalignment between the molding block structures. The molding block structure includes a first lower die punch molding block (2) and a second lower die punch molding block (3). The first lower die punch molding block (2) is provided on the first die (101), and the second lower die punch molding block (3) is provided on the second die (102).

2. The anti-misalignment structure for molding blocks in a molding die as described in claim 1, characterized in that, The first mold (101) and the second mold (102) are hot stamping forming molds used to form high-strength steel plate parts.

3. The anti-misalignment structure for molding blocks in a molding die as described in claim 1, characterized in that, The vertical positioning key (1) is located between the mating surfaces of the two inserts and is integrally formed or separately assembled with the molding block structure.

4. The anti-misalignment structure for molding blocks in a molding die as described in claim 1, characterized in that, The forming block structure is made of steel and is suitable for cold stamping or hot stamping processes. The arrangement of the vertical positioning key (1) corresponds to the height difference area of ​​the part shape to optimize the force distribution.

5. The anti-misalignment structure for molding blocks in a molding die as described in claim 1, characterized in that, It also includes a first mounting bracket (4) and a second mounting bracket (5). The first mold (101) and the second mold (102) are arranged opposite to each other and the first mold (101) is located above the second mold (102). The first mold (101) is fixedly connected to the first mounting bracket (4) and the second mold (102) is fixedly connected to the second mounting bracket (5). Both ends of the bottom of the second mounting bracket (5) are fixedly mounted with brackets (10), and each bracket (10) has multiple mounting holes.

6. The anti-misalignment structure for molding blocks in a molding die as described in claim 5, characterized in that, The second mounting bracket (5) has through openings (6) on both sides, and the through openings (6) pass through the second mounting bracket (5). Each through opening (6) has a movable part (7) that slides up and down on the through opening (6). Each of the top ends of the movable part (7) has a guide groove (8). Each of the four corners of the bottom of the first mounting bracket (4) has a conical block (9) that can be moved into the guide groove (8) and the guide groove (8) is used to guide the conical block (9).

7. The anti-misalignment structure for molding blocks in a molding die as described in claim 6, characterized in that, Each of the movable parts (7) has a base block (11) fixedly installed at its bottom. The lower end of the base block (11) passes through the through hole (6). Each of the base blocks (11) has an elastic element (12) fixedly connected to it. The other end of the elastic element (12) is fixedly connected to the second mounting bracket (5).

8. The anti-misalignment structure for molding blocks in a molding die as described in claim 7, characterized in that, An adjustment mechanism (13) is installed on the second mounting bracket (5). The adjustment mechanism (13) is configured to cooperate with the four bottom blocks (11) and is used to adjust the height of the guide groove (8).

9. The anti-misalignment structure for molding blocks in a molding die as described in claim 8, characterized in that, The adjustment mechanism (13) includes two spaced-apart support plates (14). The support plates (14) are fixedly connected to the bottom of the second mounting frame (5). A rotating shaft (15) is rotatably installed between the two support plates (14). An eccentric wheel (16) is fixedly installed at both ends of the rotating shaft (15). The rotating shaft (15) is installed at the eccentric position of the eccentric wheel (16). One end of the rotating shaft (15) passes through one side of the support plate (14). The ends of the rotating shaft (15) are connected to gears (17) by screws. An electric telescopic rod (18) is fixedly installed at the bottom of the second mounting frame (5). The output end of the electric telescopic rod (18) is connected to a rod (19) by screws. A rack part (20) is integrally formed on the rod part (19). The gears (17) on both sides of the rack part (20) are engaged.

10. The anti-misalignment structure for molding blocks in a molding die as described in claim 9, characterized in that, The electric telescopic rod (18) has self-locking properties.

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