Anti-loose bolt and manufacturing process thereof

Abstract

The application relates to a locking type bolt and a preparation process thereof, and relates to the technical field of bolt preparation, and comprises the following steps: S1, taking a bolt base for heat treatment, wherein the bolt base comprises a bolt column and a bolt head; S2, placing the bolt base into an alkaline cleaning solution to remove oil stains and chippings, and then cleaning the bolt base by using a rust remover; S3, preparing molten protective plastic, taking 10-20 parts of polytetrafluoroethylene and 20-40 parts of PA66 plastic raw materials containing 30% of glass fibers to be heated and molten, then adding 5-15 parts of carbon fibers, 3-8 parts of talcum powder, 3-8 parts of calcium carbonate and 2-6 parts of mica powder to be uniformly mixed; and S4, placing the bolt base into a locking type bolt preparation device, injecting the uniformly mixed molten protective plastic into the locking type bolt preparation device through an injection molding machine, forming a protective plastic layer on the surface of the bolt head, and obtaining the locking type bolt.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bolt preparation, in particular to a locking bolt and a preparation process thereof. BACKGROUND

[0002] Bolts are widely used as key components for connection and fixation. Bolts can be divided into bolt columns and bolt heads according to structure. The bolt column is connected with the connection structure by threads, and the surface of the bolt column is not exposed outside, so the bolt column is not generally corroded. The bolt head is directly exposed outside, and is corroded by long-term contact with humid air or other corrosive media during use, which weakens the strength of the bolt and causes the bolt to loosen.

[0003] The existing method mainly plates zinc on the surface of the bolt by electroplating process to slow down the corrosion speed. However, in fact, the zinc plating layer is thin, and the zinc plating layer can be rubbed off during use due to friction, and the zinc plating layer is not resistant to acid and alkali.

[0004] Therefore, the present application provides a locking bolt and a preparation process thereof. A plastic layer is formed on the surface of the bolt head, which can effectively prevent the bolt head from being corroded and is resistant to acid and alkali. SUMMARY

[0005] Therefore, the present application provides a locking bolt and a preparation process thereof. A plastic layer is formed on the surface of the bolt head, which can effectively prevent the bolt head from being corroded and is resistant to acid and alkali.

[0006] The present application is achieved by the following technical solutions:

[0007] A preparation process of a locking bolt, comprising the following steps:

[0008] S1, heat treating a bolt base, the bolt base comprising a bolt column and a bolt head;

[0009] S2, placing the bolt base in an alkaline cleaning solution at 50°C-70°C to remove oil stains and debris, and then cleaning with a rust remover;

[0010] S3, preparing a molten protective plastic, heating and melting 10-20 parts of polytetrafluoroethylene and 20-40 parts of PA66 plastic raw material containing 30% glass fiber, and then adding 5-15 parts of carbon fiber, 3-8 parts of talc powder, 3-8 parts of calcium carbonate, and 2-6 parts of mica powder and mixing uniformly;

[0011] S4, the bolt body prepared in step S2 is placed into the anti-loosening bolt preparation device, then the mixed molten protective plastic is injected into the anti-loosening bolt preparation device through the injection molding machine, so that the bolt head surface is coated with the molten protective plastic, and after waiting for the molten protective plastic to cool, demolding is performed, so that a protective plastic layer is formed on the bolt head surface, and the anti-loosening bolt is obtained;

[0012] The anti-loosening bolt preparation device comprises a bottom frame, a mounting frame mounted on the bottom frame, an injection mold mounted on the mounting frame, an extrusion structure mounted in the bottom frame, and a demolding structure mounted on the side surface of the bottom frame.

[0013] The injection mold comprises two fixed blocks symmetrically mounted in the bottom frame, a lower mold mounted between the two fixed blocks, an upper extrusion mold movably mounted on the lower mold, a plurality of bolt column mounting holes for mounting bolt columns and arranged at intervals on the upper extrusion mold, and a plurality of bolt head injection holes for injecting molten protective plastic and corresponding to the bolt column mounting holes and arranged on the lower mold.

[0014] The extrusion structure comprises an extrusion piston slidably arranged in each bolt head injection hole of the lower mold, and a height adjusting assembly slidably connected to the lower side of the extrusion piston.

[0015] Further, the mounting frame is provided with a motor fixing frame, the motor fixing frame is provided with a telescopic motor, and the telescopic shaft of the telescopic motor is fixedly connected to the upper extrusion mold.

[0016] Further, the lower mold is provided with a communication groove for communicating the bolt head injection holes, and a plurality of injection holes for communicating with the injection molding machine are arranged on the side of the lower mold away from the demolding structure, and each injection hole is in communication with the nearest bolt head injection hole.

[0017] Further, the side surface of the bottom frame is provided with a motor mounting frame, the motor mounting frame is provided with a push-pull motor, the push-pull motor is provided with a mounting plate, and the height adjusting assembly is mounted on the mounting plate.

[0018] Further, the height adjusting assembly comprises a high-position adjusting push plate, a flat-position adjusting push plate, a low-position adjusting push plate, a bottom adjusting push plate, and a demolding adjusting push plate, and the high-position adjusting push plate, the flat-position adjusting push plate, the low-position adjusting push plate, the bottom adjusting push plate, and the demolding adjusting push plate are connected by a connecting plate.

[0019] Further, the lower mold lower side is provided with a mold stripping assembly, the mold stripping assembly comprises a same-position plate sliding in a bottom frame, the same-position plate lower side is in sliding fit with a mold stripping adjusting push plate, the same-position plate is provided with an array distributed limiting push rod, the same-position plate is provided with a pressure relief piston cavity corresponding to the limiting push rod, the pressure relief piston cavity is slidingly connected with a pressure relief rod, the pressure relief rod and the pressure relief piston cavity are provided with a pressure relief spring, and the pressure relief rod and the limiting push rod slide in the lower mold.

[0020] Further, the mold stripping structure comprises a collecting shell mounted on the bottom frame, the mounting frame is provided with a motor frame, the motor frame is provided with a rotating motor, the rotating motor rotating shaft is provided with a rotating rod, and the rotating rod is provided with a rotating crank.

[0021] Further, the collecting shell is provided with an array distributed mold stripping cutter, the mold stripping cutters are provided with a collecting groove parallel to the rotating crank direction, and the mold stripping cutters are provided with a connecting block perpendicular to the rotating crank direction.

[0022] Based on the same inventive concept, a locking bolt is also provided, comprising a bolt column and a bolt head, and further comprising a protective plastic layer formed on the surface of the bolt head by using the above-mentioned locking bolt preparation process.

[0023] The beneficial effects of the present application are as follows:

[0024] The locking bolt preparation process adjusts the initial position of the extrusion piston, thereby adjusting the volume of the bolt head injection hole in the lower mold, and further controlling the amount of molten protective plastic entering the bolt head injection hole in the lower mold, thereby avoiding rapid cooling due to a small amount of molten protective plastic. After the molten protective plastic injection is completed, the height of the extrusion piston is adjusted by sliding the height adjusting assembly, and the intermediate plane heights of the high position adjusting push plate, the flat position adjusting push plate, the low position adjusting push plate and the bottom adjusting push plate are consistent, so that the height of the extrusion piston is consistent, thereby making the extrusion piston extrude the molten protective plastic to flow, until the amount of molten protective plastic in the bolt head injection hole in the lower mold is consistent, and the thickness of the protective plastic layer covering the surface of the bolt head is consistent without changing the nozzle pressure of the injection molding machine.

[0025] Other advantages, objects, and features of the present application will be apparent to those skilled in the art from the following specification, and will be learned from practice of the present application. The objects and other advantages of the present application can be achieved and obtained by the following specification. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1Connection diagram of the present application.

[0027] Figure 2 Connection diagram of the main frame of the present application.

[0028] Figure 3 Connection diagram of the mold structure and the extrusion structure of the present application.

[0029] Figure 4 Sectional view of the mold structure of the present application.

[0030] Figure 5 Connection diagram of the upper extrusion mold of the present application.

[0031] Figure 6 Connection diagram of the lower mold of the present application.

[0032] Figure 7 Connection diagram of the extrusion structure of the present application.

[0033] Figure 8 Connection diagram of the height adjustment assembly of the present application.

[0034] Figure 9 Connection diagram of the ejection assembly of the present application.

[0035] Figure 10 Connection diagram of the demolding structure of the present application.

[0036] Figure 11 Connection diagram of the present application Figure 10 Enlarged view of A in the present application.

[0037] Figure 12 Structure diagram of the anti-loose bolt of the present application.

[0038] In the figure:

[0039] 1, bottom frame;

[0040] 2, mounting frame;

[0041] 3, mold structure; 31, motor fixing frame; 32, telescopic motor; 33, upper extrusion mold; 34, bolt column; 35, bolt head; 36, lower mold; 37, fixing block; 38, communication groove; 39, bolt head injection hole; 341, bolt column mounting hole;

[0042] 4, extrusion structure; 41, motor mounting frame; 42, push-pull motor; 43, mounting plate; 44, height adjustment assembly; 441, high position adjustment push plate; 442, flat position adjustment push plate; 443, low position adjustment push plate; 444, bottom adjustment push plate; 445, mold outlet adjustment push plate; 446, connecting plate; 45, extrusion piston; 46, mold outlet assembly; 461, same position plate; 462, limit push rod; 463, pressure relief piston cavity; 464, pressure relief spring; 465, pressure relief rod;

[0043] 5, demolding structure; 51, collection housing; 52, motor frame; 53, rotating motor; 54, rotating rod; 55, rotating crank; 56, demolding cutter; 57, connecting block; 58, collection groove. DETAILED DESCRIPTION

[0044] In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0045] In the above description of the present application, it should be noted that the terms "one side", "the other side" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present application is usually placed, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second" and the like are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0046] The present application provides a preparation process of a lock type bolt, comprising the following steps:

[0047] S1, heat treating a bolt base, the bolt base comprising a bolt column 34 and a bolt head 35;

[0048] S2, placing the bolt base into an alkaline cleaning liquid at 50°C-70°C to remove oil stains and debris, and then cleaning with a rust remover;

[0049] S3, preparing a molten protective plastic, taking 10-20 parts of polytetrafluoroethylene and 20-40 parts of PA66 plastic raw material containing 30% glass fiber, heating and melting, then adding 5-15 parts of carbon fiber, 3-8 parts of talc powder, 3-8 parts of calcium carbonate, and 2-6 parts of mica powder and mixing uniformly;

[0050] S4, the bolt body prepared in step S2 is put into the anti-loosening bolt preparation device, then the mixed and uniform molten protective plastic is injected into the anti-loosening bolt preparation device through an injection molding machine (not shown in the figure) to coat the surface of the bolt head 35 with the molten protective plastic, and after waiting for the molten protective plastic to cool down, demolding is performed to form a protective plastic layer (not shown in the figure) on the surface of the bolt head 35, thereby obtaining the anti-loosening bolt.

[0051] The alkaline cleaning solution and the rust remover are both existing materials, and will not be described in detail here.

[0052] Please refer to Figures 1 to 11 The anti-loosening bolt preparation device comprises a bottom frame 1, a mounting frame 2 mounted on the bottom frame 1, an injection molding die 3 mounted on the mounting frame 2, an extrusion structure 4 mounted in the bottom frame 1, and a demolding structure 5 mounted on the side of the bottom frame 1.

[0053] The injection molding die 3 comprises two fixed blocks 37 symmetrically mounted in the bottom frame 1, a lower die 36 mounted between the two fixed blocks 37, an upper extrusion die 33 provided with an extrusion fit on the lower die 36, a plurality of bolt shank mounting holes 341 for mounting bolt shanks 34 provided at intervals on the upper extrusion die 33, and a bolt head injection hole 39 for injecting molten protective plastic provided in the lower die 36 at a position corresponding to each bolt shank mounting hole 341; when the upper extrusion die 33 moves downward, each bolt head 35 is inserted into the corresponding bolt head injection hole 39.

[0054] The extrusion structure 4 comprises an extrusion piston 45 slidingly arranged in each bolt head injection hole 39 of the lower die 36, and a height adjusting assembly 44 slidingly connected to the lower side of the extrusion piston 45.

[0055] In the above manner: the upper extrusion die 33 drives the bolt shanks 34 and the bolt heads 35 to be attached to the lower die 36, the molten protective plastic is injected into the upper extrusion die 33 and the lower die 36 through the injection molding machine, the amount of molten protective plastic injected between the upper extrusion die 33 and the lower die 36 is different due to the gradual injection of the molten protective plastic and the different heights of the extrusion pistons 45, the amount of molten protective plastic in the lower die 36 decreases with the increase of the distance from the injection nozzle of the injection molding machine due to the longer path of the molten protective plastic injected into the lower die 36, and the pressure in the injection nozzle of the injection molding machine is not affected by adjusting the different heights of the initial positions of the extrusion pistons 45, the heights of the extrusion pistons 45 are adjusted to be consistent through the sliding of the height adjusting assembly 44 when the amount of injected molten protective plastic is sufficient, and then the molten protective plastic in the area with a larger amount of molten protective plastic is pushed to the area with a smaller amount of molten protective plastic, and the amount of molten protective plastic in each bolt head injection hole 39 is finally kept consistent through the consistent heights of the extrusion pistons 45.

[0056] Please refer to Figures 4 to 6 , the motor fixing frame 31 is installed on the installation frame 2, the telescopic motor 32 is installed in the motor fixing frame 31, and the telescopic shaft lower end of the telescopic motor 32 is fixedly installed with the upper extrusion die 33.

[0057] The lower die 36 is provided with a communication groove 38 for communicating the bolt head injection holes 39, and the lower die 36 is provided with a plurality of injection holes (not marked in the figure) for communicating with the injection molding machine on the side away from the demolding structure 5. Each injection hole is in communication with the nearest bolt head injection hole 39.

[0058] In the above manner: the lower die 36 is provided with a communication groove 38 for communicating the bolt head injection holes 39, so that the molten protective plastic injected from the injection hole flows into the farthest bolt head injection hole 39 from the nearest bolt head injection hole 39. Since the pressure in the nozzle of the injection molding machine is fixed, as the flow path of the molten protective plastic increases, the pressure in the nozzle needs to be increased. By adjusting the height of the extrusion piston 45, the volume of the bolt head injection hole 39 is adjusted, and the extrusion piston 45 is slid upward to extrude the molten protective plastic. In the case of not increasing the pressure of the nozzle, the flow of the molten protective plastic is assisted.

[0059] Please refer to Figure 7 and Figure 8 , the motor mounting frame 41 is installed on the side of the bottom frame 1, the push-pull motor 42 is installed in the motor mounting frame 41, the mounting plate 43 is installed on the push-pull motor 42, and the height adjusting assembly 44 is installed on the mounting plate 43.

[0060] The height adjusting assembly 44 includes a high-position adjusting push plate 441, a flat-position adjusting push plate 442, a low-position adjusting push plate 443, a bottom adjusting push plate 444, and a demolding adjusting push plate 445. The high-position adjusting push plate 441, the flat-position adjusting push plate 442, the low-position adjusting push plate 443, the bottom adjusting push plate 444, and the demolding adjusting push plate 445 are all provided with a connecting plate 446 for connection.

[0061] The initial heights of the high-position adjusting push plate 441, the flat-position adjusting push plate 442, the low-position adjusting push plate 443, and the bottom adjusting push plate 444 decrease in turn.

[0062] In the above manner: the left side of the plane height between the high-position adjusting push plate 441, the flat-position adjusting push plate 442, the low-position adjusting push plate 443 and the bottom adjusting push plate 444 is different, thereby making the initial height of the extrusion piston 45 different. When the upper extrusion die 33 and the lower die 36 are close to perform the extrusion action, the high-position adjusting push plate 441 is contacted first, the extrusion piston on the high-position adjusting push plate 441 is pushed first to extrude the excess molten protective plastic in the corresponding bolt head injection hole 39. Similarly, then the extrusion pistons on the flat-position adjusting push plate 442, the low-position adjusting push plate 443 and the bottom adjusting push plate 444 are extruded in turn to extrude the excess molten protective plastic in the corresponding bolt head injection hole 39, which can effectively reduce the extrusion force.

[0063] Please refer to Figure 7 and Figure 9 , the lower side of the lower die 36 is provided with an ejection assembly 46, the ejection assembly 46 includes a same-position plate 461 sliding in the bottom frame 1, the lower side of the same-position plate 461 is in sliding fit with an ejection adjusting push plate 445, the same-position plate 461 is provided with an array of limiting push rods 462, the same-position plate 461 is provided with a pressure relief piston cavity 463 corresponding to the limiting push rods 462, the pressure relief piston cavity 463 is slidingly connected with a pressure relief rod 465, the pressure relief rod 465 and the pressure relief piston cavity 463 are provided with a pressure relief spring 464, the pressure relief rod 465 and the limiting push rod 462 both slide in the lower die 36.

[0064] In the above manner, the sliding space between the pressure relief rod 465 and the pressure relief piston cavity 463 makes the pressure relief rod 465 slide into the pressure relief piston cavity 463 with the pressure in the injection molding machine nozzle, thereby buffering the pressure, when the cooling of the molten protective plastic in the upper extrusion die 33 and the lower die 36 is completed, the same-position plate 461 slides upward through the sliding of the ejection adjusting push plate 445, thereby the limiting push rod 462 and the pressure relief rod 465 push the cooled plastic in the lower die 36 out of the lower die 36.

[0065] Please refer to Figure 10 and Figure 11 , the demolding structure 5 includes a collection housing 51 mounted on the bottom frame 1, a motor frame 52 mounted on the mounting frame 2, a rotating motor 53 mounted in the motor frame 52, a rotating rod 54 mounted on the rotating shaft of the rotating motor 53, and a rotating crank 55 mounted on the rotating rod 54.

[0066] The collection housing 51 is provided with an array of demolding cutters 56, the collection housing 51 is provided with a collection groove 58 parallel to the direction of the rotating crank 55 between the demolding cutters 56, and the collection housing 51 is provided with a connecting block 57 perpendicular to the direction of the rotating crank 55 between the demolding cutters 56.

[0067] The inner diameter of the demolding tool 56 is consistent with the outer diameter of the extrusion piston 45, and the demolding tool 56 is rotated 180° around the rotating rod 54 to correspond to the extrusion piston 45.

[0068] In the above manner, the inner diameter of the lower mold 36 is consistent with the outer diameter of the extrusion piston 45, thereby scraping off the protective plastic layer after cooling, cutting off the cooling plastic in the outer contour of the protective plastic layer that may exist on the bolt head injection hole 39 and the communication groove 38, and collecting the cut-off cooling plastic through the collection groove 58.

[0069] Based on the same inventive concept, a loosening-resistant bolt is also provided, which comprises a bolt shank 34 and a bolt head 35, and further comprises a protective plastic layer (not labeled in the figure) formed on the surface of the bolt head 35 by using the above-mentioned loosening-resistant bolt preparation process. Figure 12

[0070] The bolt base comprises the following components by weight: Fe 85-95%, Cr 2-5%, Ni 1-3%, Mo 0.5-2%, C 0.1-0.5%, Si 0.5-1.5%, Mn 0.5-1.5%, B 0.001-0.01%, and V 0.05-0.2%.

[0071] The nylon resin in the protective plastic layer has good flexibility and elasticity, and when the bolt base is subjected to vibration, it can absorb and disperse vibration energy through its own elastic deformation, reduce the relative displacement between the bolt base and the connecting piece, and effectively prevent the bolt base from loosening.

[0072] Carbon fibers have high strength and high modulus characteristics, and after being added to the protective plastic layer, they can enhance the overall strength and rigidity of the plastic layer, making it less likely to deform under a large external force and preventing loosening.

[0073] The protective plastic layer itself has good chemical stability and can resist the corrosion of various chemicals, protecting the bolt base from corrosion and ensuring that the bolt base can work normally in various complex environments.

[0074] The addition of talc, calcium carbonate, and mica powder improves the stability and heat resistance of the protective plastic layer. Talc and calcium carbonate can increase the hardness and rigidity of the plastic layer, reducing the dimensional change caused by temperature changes; mica powder has good insulation and heat resistance, which can improve the heat resistance level of the plastic layer, so that the bolt base can still maintain good performance in a high-temperature environment.

[0075] ​Finally, it is to be explained that the above embodiments are only used to illustrate the technical solutions of the present application but not to limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or equivalently replaced without departing from the purpose and scope of the present application, and all of them should be covered in the scope of the claims of the present application.

Claims

1. A process for producing a self-locking bolt, characterized by: The method comprises the following steps: S1, taking the bolt base for heat treatment, the bolt base comprising a bolt column (34) and a bolt head (35); S2, placing the bolt base into an alkaline cleaning solution at 50°C-70°C to remove oil stains and debris, and then cleaning with a rust remover; S3, preparing molten protective plastic, taking 10-20 parts of polytetrafluoroethylene and 20-40 parts of PA66 plastic raw material containing 30% glass fiber, heating and melting, then adding 5-15 parts of carbon fiber, 3-8 parts of talc powder, 3-8 parts of calcium carbonate, and 2-6 parts of mica powder, and mixing uniformly; S4, placing the bolt base prepared in step S2 into the anti-loose bolt preparation device, then injecting the uniformly mixed molten protective plastic into the anti-loose bolt preparation device through an injection molding machine, so that the surface of the bolt head (35) is coated with molten protective plastic, waiting for the molten protective plastic to cool down, demolding, forming a protective plastic layer on the surface of the bolt head (35), and obtaining an anti-loose bolt; The anti-loose bolt preparation device comprises a bottom frame (1), a mounting frame (2) mounted on the bottom frame (1), an injection mold (3) mounted on the mounting frame (2), an extrusion structure (4) mounted in the bottom frame (1), and a demolding structure (5) mounted on the side of the bottom frame (1); The injection mold (3) comprises two fixed blocks (37) symmetrically mounted in the bottom frame (1), a lower mold (36) mounted between the two fixed blocks (37), an upper extrusion mold (33) provided on the lower mold (36) in extrusion cooperation, a plurality of bolt column mounting holes (341) for mounting the bolt column (34) are provided on the upper extrusion mold (33) at intervals, and a bolt head injection hole (39) for injecting molten protective plastic is provided on the lower mold (36) at a position corresponding to each bolt column mounting hole (341). The extrusion structure (4) comprises an extrusion piston (45) slidingly arranged in each bolt head injection hole (39) of the lower mold (36), and the lower side of the extrusion piston (45) is slidingly connected with a height adjusting assembly (44); The height adjusting assembly (44) comprises a high position adjusting push plate (441), a flat position adjusting push plate (442), a low position adjusting push plate (443), a bottom adjusting push plate (444), and a demolding adjusting push plate (445), and a connecting plate (446) is mounted between the high position adjusting push plate (441), the flat position adjusting push plate (442), the low position adjusting push plate (443), the bottom adjusting push plate (444), and the demolding adjusting push plate (445) for connection.

2. A process for producing a self-locking bolt according to claim 1, characterized in that: A motor fixing frame (31) is mounted on the mounting frame (2), a telescopic motor (32) is mounted in the motor fixing frame (31), and the lower end of the telescopic shaft of the telescopic motor (32) is fixedly mounted with the upper extrusion mold (33).

3. A process for producing a check bolt according to claim 2, characterized in that: The lower mold (36) is provided with a communication groove (38) for connecting the bolt head injection holes (39), and the side of the lower mold (36) away from the demolding structure (5) is provided with a plurality of injection holes for communication with the injection molding machine, each of which is in communication with the nearest bolt head injection hole (39).

4. The process for producing a check bolt according to claim 1, wherein: The side of the bottom frame (1) is provided with a motor mounting rack (41), the motor mounting rack (41) is provided with a push-pull motor (42), the push-pull motor (42) is provided with a mounting plate (43), and the height adjusting assembly (44) is mounted on the mounting plate (43).

5. The process for making a check bolt according to claim 1, wherein: The lower side of the lower mold (36) is provided with an ejection assembly (46), the ejection assembly (46) includes a co-site plate (461) provided on the bottom frame (1), the lower side of the co-site plate (461) is in sliding fit with an ejection adjusting push plate (445), the co-site plate (461) is provided with an array of limiting push rods (462), the co-site plate (461) is provided with a pressure relief piston cavity (463) corresponding to the limiting push rod (462), the pressure relief piston cavity (463) is provided with a pressure relief rod (465) in sliding connection, and the pressure relief rod (465) and the pressure relief piston cavity (463) are provided with a pressure relief spring (464), the pressure relief rod (465) and the limiting push rod (462) are in sliding fit in the lower mold (36).

6. The process of claim 1, wherein: The demolding structure (5) includes a collection housing (51) mounted on the bottom frame (1), the mounting frame (2) is provided with a motor frame (52), the motor frame (52) is provided with a rotating motor (53), the rotating shaft of the rotating motor (53) is provided with a rotating rod (54), and the rotating rod (54) is provided with a rotating crank (55).

7. A process for producing a check bolt according to claim 6, characterized in that: The collection housing (51) is provided with an array of demolding cutters (56), the demolding cutters (56) are provided with a collection groove (58) parallel to the direction of the rotating crank (55), and the demolding cutters (56) are provided with a connecting block (57) perpendicular to the direction of the rotating crank (55).

Images