Bolt non-cutting forming die

Abstract

The utility model discloses a bolt non-cutting forming die, which relates to the technical field of bolt processing and comprises a base, a driving component is arranged in an inner cavity of the base, support plates are mounted at two ends of the top of the base, and screw rods are connected between the inner top walls of the two groups of support plates and the top of the base through bearings. The bottoms of the two lead screws are connected with the top of the driving assembly, the outer walls of the two lead screws are in threaded connection with nuts, a lifting plate is installed between the two nuts, connecting rods are installed at the two ends of the bottom of the lifting plate, a lower mold is installed between the two connecting rods, and a second forming cavity is formed in the top of the lower mold. The electric push rod, the connecting rod driving assembly, the base, the supporting plate, the lead screw, the nut and the lifting plate are arranged in a matched mode, so that the upper die and the lower die enter the cooling tank to make contact with cooling water to be soaked and cooled, bolts can be rapidly cooled, and the forming efficiency of the die is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of bolt processing, in particular to a bolt non-cutting forming die. Background Art

[0002] Bolts, mechanical parts, cylindrical threaded fasteners equipped with nuts, a type of fastener consisting of a head and a screw, which needs to be matched with a nut to fasten two parts with through holes. Bolts are a kind of metal connector with a wide range of applications and play a more important role. Since the current bolt forming steps are more complicated and require multiple cutting processes, not only does it cause waste of edge materials and increase costs, but the formed bolts also need to be polished and deburred, which is more troublesome to process. Therefore, mold injection molding is gradually adopted.

[0003] The Chinese utility model patent announcement number CN214023348U discloses a hexagonal adjustable bolt forming mold, the upper mold plate is located directly above the first half mold and the second half mold, a pouring port is connected at the upper center of the upper mold plate, the first half mold and the second half mold are provided with a matching first half hexagonal bolt cavity and a second half hexagonal bolt cavity on opposite sides, an adjustment mechanism is fixedly connected to the same side of the first half mold and the second half mold, and a positioning mechanism is fixedly connected to the other same side of the first half mold and the second half mold. The utility model facilitates the fitting or separation of the first half mold and the second half mold by setting an adjustment mechanism, thereby facilitating material removal and realizing one-piece casting and molding processing, thereby improving production efficiency. However, the bolts in the above-mentioned mold are usually naturally cooled after injection molding, and the cooling speed is slow and the cooling time is insufficient. The slow cooling speed will result in a long molding time, and the insufficient cooling time and temperature will result in a poor bolt molding effect in the mold. Summary of the invention

[0004] In order to improve the above-mentioned problem that the bolts in the mold are usually cooled naturally after injection molding, the cooling speed is slow and the cooling time is insufficient, the slow cooling speed will lead to a long molding time, and the insufficient cooling time and temperature will result in a poor forming effect of the bolts in the mold, the utility model provides a bolt non-cutting forming mold.

[0005] The utility model provides a bolt non-cutting forming die, which adopts the following technical scheme:

[0006] A bolt non-cutting forming mold, comprising a base, an inner cavity of the base is provided with a driving assembly, support plates are installed at both ends of the top of the base, screw rods are connected between the inner top walls of the two groups of support plates and the top of the base through bearings, the bottoms of the two groups of screw rods are connected to the top of the driving assembly, the outer walls of the two groups of screw rods are threadedly connected with nuts, a lifting plate is installed between the two groups of nuts, connecting rods are installed at both ends of the bottom of the lifting plate, a lower mold is installed between the two groups of connecting rods, a second forming cavity is opened at the top of the lower mold, an electric push rod is installed at one end of the bottom of the lifting plate close to the connecting rod, an upper mold is installed at the output end of the electric push rod, a first forming cavity is opened at the bottom of the upper mold, an injection molding tube is connected to the top of the first forming cavity, a cooling groove is installed on the base below the lower mold, and a drain pipe is connected to the bottom of one side of the cooling groove.

[0007] By adopting the above technical solution, the user controls the electric push rod to extend through the controller, and the extension of the electric push rod drives the upper mold to move downward. When the upper mold moves downward, it drives the positioning column to be inserted into the positioning hole for pre-positioning, so that the upper mold and the lower mold are stably fitted. After fitting, the user connects the injection molding tube to the external injection molding machine, so that the liquid flows into the first molding cavity and the second molding cavity for molding, and then injects an appropriate amount of cooling water into the inner cavity of the cooling tank, and drives the two sets of screw rods of the drive assembly to rotate synchronously. The rotation of the screw rod drives the nut to move downward, and the movement of the nut drives the lifting plate to move downward, so that the upper mold and the lower mold can enter the cooling tank and contact with the cooling water for immersion cooling. The cooling efficiency is improved by the cooling water, thereby accelerating the forming efficiency of the bolt.

[0008] Optionally, the driving assembly includes a servo motor, which is installed at the right end of the inner bottom wall of the base, and a driving shaft is installed at the power output end of the servo motor, and a driving pulley is sleeved on the outer wall of the driving shaft. The end of the inner cavity of the base away from the driving shaft is connected to a driven shaft through a bearing, and a driven pulley is sleeved on the outer wall of the driven shaft. A connecting belt is provided for the external transmission of the driven pulley and the driving pulley, and the tops of the driven shaft and the driving shaft are respectively fixedly connected to the bottoms of the two groups of screw rods.

[0009] By adopting the above technical solution, when the servo motor is working, the driving shaft drives the driving pulley to rotate, the driving pulley rotates through the connecting belt to drive the driven pulley to rotate, and the driven pulley rotates to drive the driven shaft to rotate, so that the two sets of screws can be driven to rotate synchronously through the driven shaft and the driving shaft.

[0010] Optionally, an observation window is installed on the surface of the cooling trough.

[0011] By adopting the above technical solution, the liquid level of the coolant in the inner cavity of the cooling tank can be observed through the observation window.

[0012] Optionally, a control valve is provided at one end of the drain pipe away from the cooling tank.

[0013] By adopting the above technical solution, the drain pipe can be opened or closed by switching the control valve.

[0014] Optionally, the inner bottom wall of the lower mold is provided with a ejection assembly, and the ejection assembly includes a groove body, the groove body is installed on the inner bottom wall of the lower mold, the inner bottom wall of the groove body is evenly connected with return springs, a movable plate is installed on the top of the return spring, the top of the movable plate is connected with a ejection rod, and the top of the ejection rod is connected to the bottom of the second molding cavity.

[0015] By adopting the above technical solution, when the upper mold is separated from the lower mold, under the elastic force of the return spring, the ejector rod moves upward to eject the workpiece from the positioning column to complete the demoulding operation, thereby effectively accelerating the bolt production efficiency.

[0016] Optionally, a sliding assembly is provided between the movable plate and the groove body, the sliding assembly includes a pulley, the pulley is installed at both ends of the movable plate, and slide rails are provided on both sides of the inner cavity of the groove body, and the slide rails are rollingly connected to the pulley.

[0017] By adopting the above technical solution, when the movable board moves, it can drive the pulley to slide in the slide rail, so that the movable board can move more smoothly.

[0018] Optionally, both ends of the bottom of the upper mold are connected to positioning columns, and both ends of the top of the lower mold are provided with positioning holes that match the positioning columns. The bottoms of the two groups of positioning columns extend into the inner cavity of the groove body and abut against the top of the movable plate.

[0019] By adopting the above technical solution, the positioning column is inserted into the corresponding positioning hole, so that the upper mold and the lower mold can be positioned, and the offset when the upper mold and the lower mold are connected can be avoided as much as possible.

[0020] In summary, the present invention has at least one of the following beneficial effects:

[0021] (1) Through the coordinated arrangement of the electric push rod, the connecting rod driving assembly, the base, the support plate, the screw rod, the nut and the lifting plate, the upper mold and the lower mold enter the cooling tank and contact with the cooling water for immersion cooling, so that the bolts can be cooled quickly, thereby improving the molding efficiency of the mold.

[0022] (2) Through the coordinated arrangement of the positioning column, positioning hole, ejector rod, movable plate, return spring and groove body, when the upper mold is separated from the lower mold, under the elastic force of the return spring, the ejector rod moves upward to eject the workpiece from the positioning column to complete the demolding operation, thereby effectively accelerating the production efficiency of the bolt. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0024] Figure 1 It is a cross-sectional structural schematic diagram of the utility model;

[0025] Figure 2 This is a front view structural schematic diagram of the utility model;

[0026] Figure 3 For the utility model Figure 1 Schematic diagram of the structure at A in the middle;

[0027] Figure 4 For the utility model Figure 1 Schematic diagram of the structure at point B in the middle.

[0028] In the figure: 1. electric push rod; 2. connecting rod; 3. first molding cavity; 4. upper mold; 5. second molding cavity; 6. positioning column; 7. lower mold; 8. cooling trough; 9. driving assembly; 901. driven pulley; 902. driven shaft; 903. connecting belt; 904. driving shaft; 905. servo motor; 906. driving pulley; 10. base; 11. control valve; 12. drain pipe; 13. support plate; 14. positioning hole; 15. injection tube; 16. screw rod; 17. nut; 18. lifting plate; 19. observation window; 20. sliding assembly; 2001. slide rail; 2002. pulley; 21. ejector assembly; 2101. ejector rod; 2102. movable plate; 2103. reset spring; 2104. groove body. DETAILED DESCRIPTION

[0029] The following is combined with Figure 1-4 The utility model is described in further detail.

[0030] Please refer to the attached figure in the instruction manual Figure 1 and Figure 2The utility model provides an embodiment: a bolt non-cutting forming mold, including a base 10, the inner cavity of the base 10 is provided with a driving assembly 9, support plates 13 are fixedly installed at both ends of the top of the base 10, and screw rods 16 are rotatably connected between the inner top walls of the two groups of support plates 13 and the top of the base 10 through bearings. The bottoms of the two groups of screw rods 16 are connected to the top of the driving assembly 9, and the driving assembly 9 includes a servo motor 905, which is installed at the right end of the inner bottom wall of the base 10. A driving shaft 904 is fixedly installed at the power output end of the servo motor 905, a driving pulley 906 is fixedly sleeved on the outer wall of the driving shaft 904, a driven shaft 902 is rotatably connected to the end of the inner cavity of the base 10 away from the driving shaft 904 through a bearing, a driven pulley 901 is fixedly sleeved on the outer wall of the driven shaft 902, a connecting belt 903 is provided for the external transmission of the driven pulley 901 and the driving pulley 906, and the tops of the driven shaft 902 and the driving shaft 904 are respectively fixedly connected to the bottoms of the two groups of screw rods 16. When the servo motor 905 is working, the driving pulley 906 is driven to rotate through the driving shaft 904, the driving pulley 906 rotates to drive the driven pulley 901 to rotate through the connecting belt 903, and the driven pulley 901 rotates to drive the driven shaft 902 to rotate, so that the two groups of screw rods 16 can be driven to rotate synchronously through the driven shaft 902 and the driving shaft 904.

[0031] Please refer to the attached figure in the instruction manual Figure 1 and Figure 4 The outer walls of the two groups of screw rods 16 are both threadedly connected with screw nuts 17, a lifting plate 18 is fixedly installed between the two groups of screw nuts 17, connecting rods 2 are fixedly installed at both ends of the bottom of the lifting plate 18, a lower mold 7 is fixedly installed between the two groups of connecting rods 2, a second molding cavity 5 is opened on the top of the lower mold 7, an electric push rod 1 is installed at one end of the bottom of the lifting plate 18 close to the connecting rod 2, an upper mold 4 is fixedly installed on the output end of the electric push rod 1, a top material assembly 21 is provided on the inner bottom wall of the lower mold 7, the top material assembly 21 includes a groove body 2104, the groove body 2104 is installed on the inner bottom wall of the lower mold 7, a plurality of return springs 2103 are connected to the inner bottom wall of the groove body 2104 at equal intervals, a movable plate 2102 is installed on the top of the plurality of return springs 2103, a push rod 2101 is fixedly connected to the top of the movable plate 2102, and the top of the push rod 2101 is communicated with the bottom of the second molding cavity 5. When the upper mold 4 is separated from the lower mold 7, under the elastic force of the return spring 2103, the ejector rod 2101 moves upward to eject the workpiece from the positioning column 6 to complete the demoulding operation, thereby effectively accelerating the bolt production efficiency.

[0032] Please refer to the attached figure in the instruction manual Figure 1 and Figure 3A sliding assembly 20 is provided between the movable plate 2102 and the groove body 2104. The sliding assembly 20 includes pulleys 2002. The pulleys 2002 are rotatably mounted at both ends of the movable plate 2102. Slide rails 2001 are provided on both sides of the inner cavity of the groove body 2104. The slide rails 2001 are rollingly connected to the pulleys 2002. When the movable plate 2102 moves, it can drive the pulleys 2002 to slide in the slide rails 2001, so that the movable plate 2102 moves more smoothly.

[0033] Please refer to the attached figure in the instruction manual Figure 1 , both ends of the bottom of the upper mold 4 are fixedly connected with positioning posts 6, and both ends of the top of the lower mold 7 are provided with positioning holes 14 that match the positioning posts 6. The bottoms of the two groups of positioning posts 6 extend into the inner cavity of the groove body 2104 and abut against the top of the movable plate 2102. The positioning posts 6 are inserted into the corresponding positioning holes 14, so that the upper mold 4 and the lower mold 7 can be positioned, and the offset when the upper mold 4 and the lower mold 7 are connected can be avoided as much as possible.

[0034] Please refer to the attached figure in the instruction manual Figure 1 and Figure 2 The bottom of the upper mold 4 is provided with a first molding cavity 3, the top of the first molding cavity 3 is connected to an injection tube 15, a cooling tank 8 is fixedly installed on the base 10 below the lower mold 7, and an observation window 19 is installed on the surface of the cooling tank 8. Therefore, the liquid level of the coolant in the inner cavity of the cooling tank 8 can be observed through the observation window 19. A drain pipe 12 is fixedly connected to the bottom of one side of the cooling tank 8, so that the coolant can be discharged from the cooling tank 8 through the drain pipe 12. A control valve 11 is provided at one end of the drain pipe 12 away from the cooling tank 8. The drain pipe 12 can be opened or closed by switching the control valve 11.

[0035] Working principle: When using the mold, the user controls the electric push rod 1 to extend through the controller, and the electric push rod 1 extends to drive the upper mold 4 to move downward. When the upper mold 4 moves downward, it drives the positioning column 6 to be inserted into the positioning hole 14 for pre-positioning. The positioning column 6 moves into the inner cavity of the groove body 2104 and drives the movable plate 2102 to move downward. The movable plate 2102 drives the push rod 2101 to move downward, so that the top of the push rod 2101 and the bottom of the inner wall of the positioning column 6 are on the same horizontal line, so that the upper mold 4 and the lower mold 7 are stably fitted. After fitting, the user connects the injection tube 15 to the external injection molding machine, so that the liquid flows into the first molding cavity 3 and the second molding cavity 5 for molding.

[0036] Then, an appropriate amount of cooling water is injected into the inner cavity of the cooling tank 8, and the servo motor 905 is started through the controller. When the servo motor 905 is working, the driving pulley 906 is driven to rotate through the driving shaft 904. The driving pulley 906 rotates and drives the driven pulley 901 to rotate through the connecting belt 903. The driven pulley 901 rotates and drives the driven shaft 902 to rotate, which can drive the two sets of screw rods 16 to rotate synchronously. The screw rods 16 rotate to drive the nut 17 to move downward, and the movement of the nut 17 drives the lifting plate 18 to move downward, so that the upper mold 4 and the lower mold 7 can enter the cooling tank 8 and contact with the cooling water for immersion cooling. The cooling efficiency is improved by the cooling water, thereby accelerating the forming efficiency of the bolts.

[0037] After cooling for a period of time, the upper mold 4 and the lower mold 7 are moved out of the cooling tank 8, and the electric push rod 1 is controlled to contract. The contraction of the electric push rod 1 drives the upper mold 4 to move upward, thereby separating the upper mold 4 from the lower mold 7. During separation, the positioning column 6 cancels the contact with the movable plate 2102, so that the movable plate 2102 is deformed by the elastic force of the reset spring 2103, and the push rod 2101 is moved into the second molding cavity 5, so that the bolts inside the second molding cavity 56 can be ejected, which facilitates the demolding of the bolts after the molding is completed, thereby improving the production efficiency of the bolts by improving the demolding efficiency of the bolts.

[0038] The above are all preferred embodiments of the present utility model, and are not intended to limit the protection scope of the present utility model. Therefore, any equivalent changes made based on the structure, shape, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A bolt non-cutting forming die, comprising a base (10), characterized in that: The inner cavity of the base (10) is provided with a driving assembly (9), support plates (13) are installed at both ends of the top of the base (10), screw rods (16) are connected between the inner top walls of the two groups of support plates (13) and the top of the base (10) via bearings, the bottoms of the two groups of screw rods (16) are connected to the top of the driving assembly (9), the outer walls of the two groups of screw rods (16) are threadedly connected with nuts (17), a lifting plate (18) is installed between the two groups of nuts (17), and connecting rods (2) are installed at both ends of the bottom of the lifting plate (18), and the two groups of screw rods (16) are connected to the top of the driving assembly (9). A lower mold (7) is installed between the connecting rods (2), a second molding cavity (5) is provided at the top of the lower mold (7), an electric push rod (1) is installed at one end of the bottom of the lifting plate (18) close to the connecting rod (2), an upper mold (4) is installed at the output end of the electric push rod (1), a first molding cavity (3) is provided at the bottom of the upper mold (4), an injection tube (15) is connected to the top of the first molding cavity (3), a cooling groove (8) is installed on the base (10) below the lower mold (7), and a drain pipe (12) is connected to the bottom of one side of the cooling groove (8).

2. A bolt non-cutting forming die according to claim 1, characterized in that: The driving assembly (9) comprises a servo motor (905), the servo motor (905) being mounted on the right end of the inner bottom wall of the base (10), a driving shaft (904) being mounted on the power output end of the servo motor (905), a driving pulley (906) being sleeved on the outer wall of the driving shaft (904), a driven shaft (902) being connected to the end of the inner cavity of the base (10) away from the driving shaft (904) via a bearing, a driven pulley (901) being sleeved on the outer wall of the driven shaft (902), a connecting belt (903) being provided for external transmission of the driven pulley (901) and the driving pulley (906), and the tops of the driven shaft (902) and the driving shaft (904) being fixedly connected to the bottoms of the two groups of screw rods (16) respectively.

3. The bolt non-cutting forming die according to claim 1, characterized in that: An observation window (19) is installed on the surface of the cooling tank (8).

4. The bolt non-cutting forming die according to claim 1, characterized in that: A control valve (11) is provided at one end of the liquid discharge pipe (12) away from the cooling tank (8).

5. The bolt non-cutting forming die according to claim 1, characterized in that: The inner bottom wall of the lower mold (7) is provided with a ejector assembly (21), and the ejector assembly (21) comprises a groove body (2104), the groove body (2104) is installed on the inner bottom wall of the lower mold (7), the inner bottom wall of the groove body (2104) is connected with return springs (2103) at equal intervals, a movable plate (2102) is installed on the top of the return spring (2103), the top of the movable plate (2102) is connected with an ejector rod (2101), and the top of the ejector rod (2101) is connected to the bottom of the second molding cavity (5).

6. A bolt non-cutting forming die according to claim 5, characterized in that: A sliding assembly (20) is provided between the movable plate (2102) and the groove body (2104), the sliding assembly (20) comprising a pulley (2002), the pulley (2002) being mounted at both ends of the movable plate (2102), and slide rails (2001) are provided on both sides of the inner cavity of the groove body (2104), the slide rails (2001) being rollingly connected to the pulley (2002).

7. The bolt non-cutting forming die according to claim 5, characterized in that: Both ends of the bottom of the upper mold (4) are connected to positioning columns (6), and both ends of the top of the lower mold (7) are provided with positioning holes (14) that match the positioning columns (6). The bottoms of the two groups of positioning columns (6) extend into the inner cavity of the groove body (2104) and abut against the top of the movable plate (2102).

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