Forming die for producing lower connecting plate

Abstract

The utility model discloses a forming die for lower yoke plate production, and relates to the technical field of lower yoke plate production. The mold comprises a bottom plate, a demolding mechanism is arranged on the bottom plate, and the demolding mechanism comprises a first demolding assembly, a connecting assembly and a second demolding assembly; the first demolding assembly comprises a fixing plate fixedly connected to the top face of the bottom plate, two first springs penetrate through the fixing plate, the top ends of the two first springs are fixedly connected with a first mold plate, sliding blocks are fixedly connected to the left side and the right side of the first mold plate correspondingly, and two limiting blocks are fixedly connected to the top face of the bottom plate. According to the lower yoke plate mold, the demolding mechanism is arranged, so that a formed part can be prevented from being adhered to the surface of the mold after injection molding is completed, the formed part can be taken down quickly, the production period is greatly shortened, and the overall production efficiency of the formed part of the lower yoke plate is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of lower connecting plate production, in particular to a forming die for lower connecting plate production. Background Art

[0002] In the prior art, the production method of the lower connecting plate usually relies on metal casting or machining processes. Although these methods are feasible, they have the problems of low efficiency, high cost and limited design flexibility. In order to solve these problems, modern industry has gradually adopted high-precision forming mold technology. The forming mold technology uses pre-designed molds to form the metal material of the lower connecting plate. This technology includes injection molding, die casting or forging. Through this method, lower connecting plates with complex shapes and stable performance can be mass-produced, while significantly improving production efficiency and reducing material waste.

[0003] Despite the use of advanced molding technology, traditional molds still face a series of challenges during the injection molding process, especially in the rapid demolding process. The molded parts often adhere to the mold surface, so that the molded parts cannot be removed quickly. This not only greatly prolongs the production cycle, but also reduces the overall production efficiency of the lower link plate molded parts. Utility Model Content

[0004] The purpose of the utility model is to provide a molding die for the production of lower connecting plates. By providing a demoulding mechanism, it is possible to prevent the molding part from adhering to the mold surface after the injection molding is completed, and the molding part can be quickly removed. This not only greatly reduces the production cycle, but also improves the overall production efficiency of the lower connecting plate molding part, and solves the problem that the molding part often adheres to the mold surface during the rapid demoulding link of the traditional mold, so that the molding part cannot be quickly removed. This not only greatly prolongs the production cycle, but also reduces the overall production efficiency of the lower connecting plate molding part.

[0005] In order to solve the above technical problems, the utility model is realized by the following technical solutions:

[0006] The utility model is a molding die for producing a lower connecting plate, comprising a bottom plate, wherein a demoulding mechanism is arranged on the bottom plate, and the demoulding mechanism comprises a first demoulding component, a connecting component and a second demoulding component;

[0007] The first demolding assembly includes a fixing plate fixedly connected to the top surface of the bottom plate. Two first springs penetrate through the fixing plate. The bottom ends of the two first springs and the top surface of the bottom plate are fixedly connected. The top ends of the two first springs are fixedly connected to a first template. The bottom surface of the first template is in contact with the top surface of the fixing plate. Sliders are fixedly connected to the left and right sides of the first template. Two limiting blocks are fixedly connected to the top surface of the bottom plate. The outer walls of the two sliders and the inner walls of the two limiting blocks are slidably connected. A first cavity is formed in the top surface of the first template.

[0008] Further, the connecting assembly includes a second template disposed on the top surface of the first template. The bottom surface of the second template is in contact with the top surface of the first template. A second cavity is formed in the bottom surface of the second template. Two cylindrical notches are formed in the inner top wall of the second cavity. A feed port is formed in the top surface of the second template. An exhaust hole is formed in the top surface of the second template.

[0009] Further, the second demolding assembly includes a connecting block fixedly connected to the top surface of the second template. A notch is formed in the connecting block. Two second springs are fixedly connected to the inner top wall of the connecting block. The bottom ends of the two second springs are fixedly connected to a sliding plate. The outer wall of the sliding plate and the inner wall of the connecting block are slidably connected. Two second ejector posts are fixedly connected to the bottom surface of the sliding plate. The outer walls of the two second ejector posts and the inner walls of the two cylindrical notches are slidably connected.

[0010] Further, a clamping mechanism is provided on the bottom plate. The clamping mechanism includes a driving assembly, a first clamping assembly, and a second clamping assembly.

[0011] The driving assembly includes a plurality of first support ear plates fixedly connected to the top surface of the bottom plate. Hydraulic telescopic rods are hinged to the inner walls of the plurality of first support ear plates. The ends of the plurality of hydraulic telescopic rods away from the first support ear plates are fixedly connected to a first C-shaped plate.

[0012] Further, the first clamping assembly includes a plurality of second support ear plates fixedly connected to the top surface of the bottom plate. Connecting columns are hinged to the inner walls of the plurality of second support ear plates. Second connecting plates are fixedly connected to the outer walls of the plurality of connecting columns. The sides of the plurality of second connecting plates away from the first support ear plates are in contact with the outer wall of the second template. Limiting rings are fixedly connected to the outer walls of the plurality of connecting columns.

[0013] Further, the second clamping assembly includes a plurality of first connection blocks slidably connected to the outer walls of a plurality of connection columns. The tops of the plurality of first connection blocks are fixedly connected to third springs. The tops of the plurality of third springs and the bottoms of the plurality of limiting rings are fixedly connected. The outer walls of the plurality of first connection blocks are hinged with second U-shaped plates. The outer walls of the plurality of second U-shaped plates are hinged with first connection plates. The bottoms of the plurality of first connection plates are in contact with the top surface of the second template. Rectangular grooves are formed in the outer walls of the plurality of first connection plates. The inner walls of the plurality of rectangular grooves and the tops of the plurality of connection columns are hinged. The inner walls of the plurality of first U-shaped plates and the inner walls of the plurality of first connection blocks are hinged.

[0014] Further, an L-shaped support plate is fixedly connected to the top surface of the bottom plate, and a first ejector post is fixedly connected to the bottom surface of the L-shaped support plate.

[0015] Further, two hydraulic lifting columns are fixedly connected to the top surface of the bottom plate, and the tops of the two hydraulic lifting columns are in contact with the bottom surface of the connection block.

[0016] The utility model has the following beneficial effects:

[0017] 1. By providing a demolding mechanism, the first template is pushed up by the first spring inside the fixing plate, and the lower connecting plate forming part is separated from the first cavity. The second ejector post slides in the cylindrical notch, pushing the lower connecting plate forming part to separate from the second cavity. The setting of the demolding mechanism can prevent the forming part from adhering to the surface of the mold after injection molding, and the forming part can be quickly removed. This not only greatly reduces the production cycle but also improves the overall production efficiency of the lower connecting plate forming part.

[0018] 2. By providing a clamping mechanism, through the telescoping of the hydraulic telescopic rod, the first connecting plate and the second connecting plate are controlled to clamp the mold in the vertical and horizontal directions respectively, so as to ensure that the mold is tightly closed during the forming process, prevent the mold from opening under high pressure, ensure that the lower connecting plate forming part can be successfully formed, and at the same time, the clamping mechanism helps to ensure the dimensional accuracy and structural integrity of the formed product, prevent material leakage, and thus improve the overall quality of the product.

[0019] Of course, it is not necessary for any product implementing the utility model to achieve all the above advantages simultaneously. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for describing the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present utility model. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 is a schematic diagram of the overall structure of the present utility model;

[0022] Figure 2 is a schematic diagram of the structure of the demolding mechanism of the present utility model;

[0023] Figure 3 is a schematic diagram of the structure inside the first template of the present utility model;

[0024] Figure 4 is a schematic diagram of the structure of the clamping mechanism of the present utility model;

[0025] Figure 5 of the present utility model Figure 2 is an enlarged schematic diagram of the structure at position A;

[0026] Figure 6 is a schematic diagram of the structure inside the second template of the present utility model.

[0027] In the attached drawings, the list of components represented by each reference numeral is as follows:

[0028] 1. Bottom plate; 2. Demolding mechanism; 3. Clamping mechanism; 11. L-shaped support plate; 12. First ejector pin; 21. Fixed plate; 22. First template; 23. First spring; 24. Slide block; 25. Limiting block; 26. First cavity; 31. Second template; 32. Second cavity; 33. Cylindrical notch; 34. Feed port; 35. Vent hole; 41. Connecting block; 42. Notch; 43. Second spring; 44. Slide plate; 45. Second ejector pin; 51. First support ear plate; 52. Hydraulic telescopic rod; 53. First U-shaped plate; 61. Second U-shaped plate; 62. First connecting plate; 63. Rectangular groove; 64. First connecting block; 65. Third spring; 71. Second support ear plate; 72. Connecting column; 73. Second connecting plate; 74. Limiting ring; 81. Hydraulic lifting column. Detailed implementation manners

[0029] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0030] Please refer to Figure 1-6 as shown, the present utility model is a forming mold for the production of a lower link plate, including a bottom plate 1, a demolding mechanism 2 is provided on the bottom plate 1, and the demolding mechanism 2 includes a first demolding component, a connecting component and a second demolding component;

[0031] The first demoulding assembly includes a fixed plate 21 fixedly connected to the top surface of the base plate 1, two first springs 23 are penetrated on the fixed plate 21, the bottom ends of the two first springs 23 are fixedly connected to the top surface of the base plate 1, the top ends of the two first springs 23 are fixedly connected to the first template 22, the bottom surface of the first template 22 is in contact with the top surface of the fixed plate 21, the left and right sides of the first template 22 are fixedly connected to sliders 24, the top surface of the base plate 1 is fixedly connected to two limit blocks 25, the outer walls of the two sliders 24 and the inner walls of the two limit blocks 25 are slidably connected, and the top surface of the first template 22 is provided with a first cavity 26.

[0032] Among them Figure 1 , Figure 2 and Figure 3 As shown, the connecting component includes a second template 31 arranged on the top surface of the first template 22, the bottom surface of the second template 31 is in contact with the top surface of the first template 22, the bottom surface of the second template 31 is provided with a second cavity 32, the inner top wall of the second cavity 32 is provided with two cylindrical notches 33, the top surface of the second template 31 is provided with a feed port 34, and the top surface of the second template 31 is provided with an exhaust hole 35.

[0033] Among them Figure 2 , Figure 3 and Figure 6 As shown, the second demoulding assembly includes a connecting block 41 fixedly connected to the top surface of the second template 31, a slot 42 is provided on the connecting block 41, two second springs 43 are fixedly connected to the inner top wall of the connecting block 41, a slide plate 44 is fixedly connected to the bottom ends of the two second springs 43, the outer wall of the slide plate 44 is slidably connected to the inner wall of the connecting block 41, two second top columns 45 are fixedly connected to the bottom surface of the slide plate 44, and the outer walls of the two second top columns 45 are slidably connected to the inner walls of the two cylindrical slots 33.

[0034] By providing a demolding mechanism 2, raw materials are injected into the first cavity 26 on the first template 22 and the second cavity 32 on the second template 31 through the feeding port 34. At the same time, exhaust holes 35 are provided on the second template 31 to prevent bubbles or voids from forming inside the molded part. After the lower connecting plate is molded, the clamping mechanism 3 is released. At this time, the first template 22 is pushed up by the first spring 23 inside the fixed plate 21, and the lower connecting plate molded part is separated from the first cavity 26 on the first template 22. The slider 24 slides on the inner wall of the limiting block 25 to play a limiting role. Then, the hydraulic lifting column 81 extends and pushes the connecting block 41 upward. At this time, the first ejector pin 12 will push the slide plate 44 downward, and the second ejector pin 45 will slide in the cylindrical notch 33, pushing the lower connecting plate molded part to separate from the second cavity 32 on the second template 31. After demolding, the connecting block 41 descends with the hydraulic lifting column 81, and the second spring 43 pulls the slide plate 44 back to its original position. The setting of the demolding mechanism 2 can prevent the molded part from adhering to the surface of the mold after injection molding, and can quickly remove the molded part. This not only greatly reduces the production cycle, but also improves the overall production efficiency of the lower connecting plate molded part.

[0035] Among them, as Figure 2 and Figure 4 shown, a clamping mechanism 3 is provided on the bottom plate 1, and the clamping mechanism 3 includes a driving component, a first clamping component and a second clamping component;

[0036] The driving component includes a plurality of first support ear plates 51 fixedly connected to the top surface of the bottom plate 1. The inner walls of the plurality of first support ear plates 51 are all hinged with hydraulic expansion rods 52, and one end of each of the plurality of hydraulic expansion rods 52 away from the first support ear plate 51 is fixedly connected with a first C-shaped plate 53.

[0037] Among them, as Figure 4 shown, the first clamping component includes a plurality of second support ear plates 71 fixedly connected to the top surface of the bottom plate 1. The inner walls of the plurality of second support ear plates 71 are all hinged with connecting columns 72. The outer walls of the plurality of connecting columns 72 are all fixedly connected with second connecting plates 73. One side of the plurality of second connecting plates 73 away from the first support ear plate 51 is in contact with the outer wall of the second template 31, and the outer walls of the plurality of connecting columns 72 are all fixedly connected with limiting rings 74.

[0038] Among them, as Figure 4As shown in the figure, the second clamping assembly includes a plurality of first connection blocks 64 slidably connected to the outer walls of a plurality of connection columns 72. The tops of the plurality of first connection blocks 64 are fixedly connected to a plurality of third springs 65. The tops of the plurality of third springs 65 and the bottoms of the plurality of limit rings 74 are fixedly connected. The outer walls of the plurality of first connection blocks 64 are hinged to a plurality of second U-shaped plates 61. The outer walls of the plurality of second U-shaped plates 61 are hinged to a plurality of first connection plates 62. The bottoms of the plurality of first connection plates 62 are in contact with the top surface of the second template 31. Rectangular grooves 63 are formed in the outer walls of the plurality of first connection plates 62. The inner walls of the plurality of rectangular grooves 63 and the tops of the plurality of connection columns 72 are hinged. The inner walls of the plurality of first U-shaped plates 53 and the inner walls of the plurality of first connection blocks 64 are hinged.

[0039] By providing the clamping mechanism 3, after the template is placed, the hydraulic telescopic rod 52 hinged to the first support ear plate 51 extends. At this time, the connection column 72 on the second support ear plate 71 rotates, and the second connection plate 73 will also rotate accordingly to clamp the template in the horizontal direction. And due to the extension of the hydraulic telescopic rod 52, the first U-shaped plate 53 will also drive the first connection block 64 to slide upward. The second U-shaped plate 61 rotates on the first connection block 64, and the first connection plate 62 rotates on the second U-shaped plate 61. At this time, the first connection plate 62 can clamp the template in the vertical direction. At the same time, the rectangular groove 63 on the first connection plate 62 is hinged to the top of the connection column 72, making the rotation of the first connection plate 62 more stable. When demoulding is required, the hydraulic telescopic rod 52 contracts, and the third spring 65 at the bottom of the limit ring 74 will push the first connection block 64 to slide downward, and the first connection plate 62 rotates. At this time, the clamping in the vertical direction is released, and the rotation of the connection column 72 will also drive the second connection plate 73 to release the clamping in the horizontal direction. The setting of the clamping mechanism 3 can ensure the tight closure of the mold during the forming process, prevent the mold from opening under high pressure, ensure that the lower connecting plate formed part can be successfully formed, and at the same time, the clamping mechanism helps to ensure the dimensional accuracy and structural integrity of the formed product, prevent material leakage, thereby improving the overall quality of the product.

[0040] Among them, as Figure 1 shown, an L-shaped support plate 11 is fixedly connected to the top surface of the bottom plate 1, and a first jacking column 12 is fixedly connected to the bottom surface of the L-shaped support plate 11.

[0041] By providing the L-shaped support plate 11, the L-shaped support plate 11 can provide a connection platform for the first jacking column 12. At the same time, the first jacking column 12 can play a role in jacking the slide plate 44 during demoulding. The setting of the first jacking column 12 improves the demoulding efficiency.

[0042] Among them, as Figure 1As shown, two hydraulic lifting columns 81 are fixedly connected to the top surface of the bottom plate 1 , and the top ends of the two hydraulic lifting columns 81 are in contact with the bottom surface of the connecting block 41 .

[0043] By providing the hydraulic lifting column 81, when demoulding is required, the hydraulic lifting column 81 can be extended to quickly complete the demoulding. After completion, the hydraulic lifting column 81 can be retracted to return the template to its original position. The provision of the hydraulic lifting column 81 further improves the efficiency of demoulding.

[0044] A specific application of this embodiment is: by providing a demoulding mechanism 2, raw materials are injected into the first cavity 26 on the first template 22 and the second cavity 32 on the second template 31 through the feed port 34, and at the same time, the second template 31 is provided with an exhaust hole 35 to avoid the formation of bubbles or cavities inside the molded part. After the lower connecting plate is formed, the clamping mechanism 3 is released, and the first template 22 is lifted up by the first spring 23 inside the fixed plate 21, and the lower connecting plate molded part is separated from the first cavity 26 on the first template 22. The slider 24 slides on the inner wall of the limit block 25 to play a role of limiting, and then, the hydraulic lift The lowering column 81 is extended and moves upward against the connecting block 41. At this time, the first push column 12 will slide against the slide plate 44, and the second push column 45 will slide in the cylindrical notch 33, pushing the lower connecting plate molded part out of the second cavity 32 on the second template 31. After demoulding, the connecting block 41 is lowered along with the hydraulic lifting column 81, and the second spring 43 pulls the slide plate 44 to reset. The setting of the demoulding mechanism 2 can prevent the molded part from adhering to the mold surface after the injection molding is completed, and the molded part can be quickly removed, which not only greatly reduces the production cycle, but also improves the overall production efficiency of the lower connecting plate molded part.

[0045] By providing a clamping mechanism 3, after the template is placed, the hydraulic telescopic rod 52 hinged to the first support ear plate 51 extends. At this time, the connecting column 72 on the second support ear plate 71 rotates, and the second connecting plate 73 also rotates accordingly to clamp the template in the horizontal direction. And due to the extension of the hydraulic telescopic rod 52, the first C-shaped plate 53 also slides upward with the first connecting block 64. The second C-shaped plate 61 rotates on the first connecting block 64, and the first connecting plate 62 rotates on the second C-shaped plate 61. At this time, the first connecting plate 62 can clamp the template in the vertical direction. At the same time, the rectangular groove 63 on the first connecting plate 62 is hinged to the top end of the connecting column 72, making the rotation of the first connecting plate 62 smoother. When demoulding is required, the hydraulic telescopic rod 52 contracts, and the third spring 65 at the bottom end of the limit ring 74 pushes the first connecting block 64 to slide downward, and the first connecting plate 62 rotates. At this time, the clamping in the vertical direction is released, and the rotation of the connecting column 72 also drives the second connecting plate 73 to release the clamping in the horizontal direction. The setting of the clamping mechanism 3 can ensure the tight closure of the mold during the forming process, prevent the mold from opening under high pressure, ensure that the lower connecting plate forming part can be successfully formed. At the same time, the clamping mechanism helps to ensure the dimensional accuracy and structural integrity of the formed product, prevent material leakage, and thus improve the overall quality of the product;

[0046] By providing an L-shaped support plate 11, the L-shaped support plate 11 can provide a connection platform for the first ejector post 12. At the same time, the first ejector post 12 can play a role in ejecting the slide plate 44 during demoulding. The setting of the first ejector post 12 improves the demoulding efficiency;

[0047] By providing a hydraulic lifting column 81, when demoulding is required, the hydraulic lifting column 81 can be extended to quickly complete demoulding. After completion, the hydraulic lifting column 81 can retract to return the template to its original position. The setting of the hydraulic lifting column 81 further improves the demoulding efficiency.

[0048] In the description of this specification, the description with reference to terms such as "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in a suitable manner in any one or more embodiments or examples.

[0049] The preferred embodiments of the utility model disclosed above are only used to help explain the utility model. The preferred embodiments do not describe all the details in detail, nor do they limit the utility model to the specific implementation methods described. Obviously, many modifications and changes can be made according to the content of this specification. This specification selects and specifically describes these embodiments in order to better explain the principles and practical applications of the utility model, so that technicians in the relevant technical field can well understand and use the utility model. The utility model is limited only by the claims and their full scope and equivalents.

Claims

1. A forming die for producing a lower connecting plate, comprising a bottom plate (1), characterized in that: The bottom plate (1) is provided with a demoulding mechanism (2), and the demoulding mechanism (2) comprises a first demoulding component, a connecting component and a second demoulding component; The first demoulding component comprises a fixing plate (21) fixedly connected to the top surface of the bottom plate (1), two first springs (23) passing through the fixing plate (21), the bottom ends of the two first springs (23) are fixedly connected to the top surface of the bottom plate (1), the top ends of the two first springs (23) are fixedly connected to a first template (22), the bottom surface of the first template (22) is in contact with the top surface of the fixing plate (21), the left and right sides of the first template (22) are fixedly connected to sliders (24), the top surface of the bottom plate (1) is fixedly connected to two limit blocks (25), the outer walls of the two sliders (24) and the inner walls of the two limit blocks (25) are slidably connected, and the top surface of the first template (22) is provided with a first cavity (26).

2. A molding die for producing a lower connecting plate according to claim 1, characterized in that: The connecting component comprises a second template (31) arranged on the top surface of the first template (22), the bottom surface of the second template (31) is in contact with the top surface of the first template (22), the bottom surface of the second template (31) is provided with a second cavity (32), the inner top wall of the second cavity (32) is provided with two cylindrical notches (33), the top surface of the second template (31) is provided with a feed port (34), and the top surface of the second template (31) is provided with an exhaust hole (35).

3. A molding die for producing a lower connecting plate according to claim 2, characterized in that: The second demoulding component comprises a connecting block (41) fixedly connected to the top surface of the second template (31), the connecting block (41) being provided with a notch (42), the inner top wall of the connecting block (41) being fixedly connected to two second springs (43), the bottom ends of the two second springs (43) being fixedly connected to a slide plate (44), the outer wall of the slide plate (44) being slidably connected to the inner wall of the connecting block (41), the bottom surface of the slide plate (44) being fixedly connected to two second top columns (45), the outer walls of the two second top columns (45) being slidably connected to the inner walls of the two cylindrical notches (33).

4. A molding die for producing a lower connecting plate according to claim 3, characterized in that: The base plate (1) is provided with a clamping mechanism (3), and the clamping mechanism (3) comprises a driving component, a first clamping component and a second clamping component; The driving assembly comprises a plurality of first supporting ear plates (51) fixedly connected to the top surface of the base plate (1), the inner walls of the plurality of first supporting ear plates (51) are hinged with hydraulic telescopic rods (52), and the ends of the plurality of hydraulic telescopic rods (52) away from the first supporting ear plates (51) are fixedly connected with a first shaped plate (53).

5. A molding die for producing a lower connecting plate according to claim 4, characterized in that: The first clamping assembly includes a plurality of second support ear plates (71) fixedly connected to the top surface of the bottom plate (1). Connecting columns (72) are hinged to the inner walls of the plurality of second support ear plates (71). Second connecting plates (73) are fixedly connected to the outer walls of the plurality of connecting columns (72). One side of the plurality of second connecting plates (73) away from the first support ear plate (51) is in contact with the outer wall of the second template (31). Limit rings (74) are fixedly connected to the outer walls of the plurality of connecting columns (72).

6. A molding die for producing a lower connecting plate according to claim 5, characterized in that: The second clamping assembly includes a plurality of first connecting blocks (64) slidably connected to the outer walls of the plurality of connecting columns (72). Third springs (65) are fixedly connected to the tops of the plurality of first connecting blocks (64). The tops of the plurality of third springs (65) and the bottoms of the plurality of limit rings (74) are fixedly connected. Second C-shaped plates (61) are hinged to the outer walls of the plurality of first connecting blocks (64). First connecting plates (62) are hinged to the outer walls of the plurality of second C-shaped plates (61). The bottoms of the plurality of first connecting plates (62) are in contact with the top surface of the second template (31). Rectangular grooves (63) are formed in the outer walls of the plurality of first connecting plates (62). The tops of the plurality of connecting columns (72) are hinged to the inner walls of the plurality of rectangular grooves (63). The inner walls of the plurality of first C-shaped plates (53) and the inner walls of the plurality of first connecting blocks (64) are hinged.

7. A molding die for producing a lower connecting plate according to claim 6, characterized in that: An L-shaped support plate (11) is fixedly connected to the top surface of the bottom plate (1). A first jacking column (12) is fixedly connected to the bottom surface of the L-shaped support plate (11).

8. A molding die for producing a lower connecting plate according to claim 7, characterized in that: Two hydraulic lifting columns (81) are fixedly connected to the top surface of the bottom plate (1). The tops of the two hydraulic lifting columns (81) are in contact with the bottom surface of the connecting block (41).

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