Powder pressing device with cartridge leak-proof and punch self-cleaning functions

Abstract

The utility model discloses a powder pressing device with material box leak protection and punch self -cleaning function, including material box, punch assembly, middle die material board and self -cleaning component, material box sets up on middle die material board, and material box is connected with the cylinder, and punch assembly includes punch and punch connecting block, and punch connecting block is connected with the upper die plate of pressing machine and is arranged, and self -cleaning component includes push material rod, polyurethane scraping strip, spacing support plate and tension spring, and push material rod outside is equipped with movable spacing pin, the recess is set up in the bottom four -around of material box, and the recess is inlayed with nitrile rubber strip. The utility model discloses through the slotting and inlaying nitrile rubber strip in the bottom four -around of material box, the production cost is reduced obviously, and the CT pressing time is reduced, thereby improving production efficiency, through the setting self -cleaning component, after every pressing is completed, will realize the cleaning of punch end face automatically, avoids in next pressing action, product sticks to the upper punch, leads to heavy pressure tonnage too big, causes mould or machine platform damage.

Description

Technical Field

[0001] This utility model belongs to the technical field of powder pressing equipment, specifically relating to a powder pressing device with a material box anti-leakage function and a punch self-cleaning function. Background Technology

[0002] The following two problems often exist in the pressing process of existing neodymium iron boron magnet products: (1) To prevent powder leakage from gaps during reciprocating filling, conventional material boxes use a shaped polyurethane base plate (not wear-resistant, normally requiring reprocessing once a week) or an alloy base plate (high cost, high hardness, easily damaging the base) installed between the material box and the middle die plate. This increases the thickness of the material box, and to avoid hindering the movement of the material box, the upper punching height needs to be further increased, requiring more strokes during upper punching to press normally, which increases the pressing CT and increases production costs. Moreover, the base plate is a non-standard part, resulting in high processing costs; (2) When pressing lightweight products, conventional upper punch devices tend to stick to the product. If the product is not cleaned in time, it will cause excessive pressure in the next pressing action, resulting in damage to the mold or machine. Utility Model Content

[0003] To address the aforementioned problems, this utility model provides a powder pressing device with a leak-proof material box and a self-cleaning punch, thus resolving the technical issues present in existing processes.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: A powder pressing device with leak-proof material box and self-cleaning punch functions includes a material box, a punch assembly, a middle mold plate, and a self-cleaning component. The material box is set on the middle mold plate and is connected to a cylinder. Under the action of the cylinder, the material box moves on the middle mold plate. The punch assembly includes a punch and a punch connecting block. The punch connecting block is connected to the upper template of the press. The press drives the punch assembly to move up and down to press the powder. The self-cleaning component is used to clean the end face of the punch and includes a push rod, a polyurethane scraper, a limiting support plate, and a tension spring. A movable limiting pin is provided on the outer side of the push rod. The bottom of the material box has grooves around its perimeter, and nitrile rubber strips are embedded in the grooves.

[0005] Furthermore, there are two limiting support plates, symmetrically arranged on both sides of the middle mold plate; there are two push rods, rotatably arranged symmetrically on both sides of the punch connecting block; and the polyurethane scraper is rotatably arranged at the end of the push rod away from the punch connecting block, with the polyurethane scraper located below the end face of the punch.

[0006] Furthermore, the push rod includes a horizontal push rod and a vertical push rod arranged perpendicularly to each other. One end of the vertical push rod is rotatably connected to the punch connecting block, and the other end is rotatably connected to the polyurethane scraper strip. The movable limiting pin is located on the outer side of the end of the horizontal push rod.

[0007] Furthermore, one end of the tension spring is mounted on the punch connecting block, and the other end is mounted on the vertical push rod. The fixed position of the end of the tension spring on the vertical push rod is below the height of the horizontal push rod.

[0008] Furthermore, the distance between the inner end faces of the top of the two limiting support plates is greater than the distance between the outer end faces of the two push rods; the vertical projection of the movable limiting pin falls on the top end face of the limiting support plate, thereby enabling the limiting support plate to limit the movable limiting pin.

[0009] Furthermore, the upper surface of the material box is provided with a feeding port, which is connected to an external material hopper.

[0010] Furthermore, the punch is vertically positioned below the punch connecting block, and a pressure hole is provided on the middle die plate at a position corresponding to the punch. The size and shape of the pressure hole match the size and shape of the punch.

[0011] Compared with the prior art, the technical solution of this utility model has the following beneficial effects: (1) By slotting around the bottom of the material box and embedding nitrile rubber strips, the material box can be prevented from leaking during movement, while the production cost is significantly reduced and the CT pressing time is reduced, thereby improving production efficiency. (2) By setting a self-cleaning component, the end face of the punch will be automatically cleaned after each pressing, so as to avoid excessive pressure during the next pressing action, which may cause damage to the mold or machine. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the device of this utility model; Figure 2 is a schematic diagram of the material box structure of this utility model; Figure 3 This is a schematic diagram of the push rod structure of this utility model; Figure 4 This is a flowchart illustrating the process flow of the device of this utility model during operation.

[0013] In the diagram: 1. Material box; 11. Groove; 12. Feeding port; 2. Middle mold plate; 21. Pressing hole; 3. Punch; 4. Punch connecting block; 5. Push rod; 51. Horizontal push rod; 52. Vertical push rod; 6. Polyurethane scraper; 7. Limiting support plate; 8. Tension spring; 9. Movable limit pin. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] like Figures 1-3 As shown, a powder pressing device with anti-leakage box and self-cleaning punch functions includes a material box 1, a punch assembly, a middle mold plate 2, and a self-cleaning component. The material box 1 is mounted on the middle mold plate 2 and is connected to a cylinder (not shown) for controlling its movement. The cylinder moves the material box on the middle mold plate. The punch assembly includes a punch 3 and a punch connecting block 4. The punch 3 is vertically positioned below the punch connecting block 4. The punch connecting block 4 is connected to the upper template of the press (not shown) and moves the punch assembly up and down to press the powder. The self-cleaning component is used to clean the end face of the punch 3 and includes a push rod 5, a polyurethane scraper 6, a limiting support plate 7, and a tension spring 8. A movable limiting pin 9 is provided on the outer side of the push rod 5.

[0016] There are two limiting support plates 7, which are symmetrically arranged on both sides of the middle mold plate 2. There are two push rods 5, which are rotatably and symmetrically arranged on both sides of the punch connecting block 4. The polyurethane scraper 6 is rotatably arranged at the end of the push rod 5 away from the punch connecting block 4. The polyurethane scraper 6 is located below the end face of the punch 3.

[0017] like Figure 3 As shown, the push rod 5 includes a horizontal push rod 51 and a vertical push rod 52 arranged perpendicularly to each other. One end of the vertical push rod 52 is rotatably connected to the punch connecting block 4, and the other end is rotatably connected to the polyurethane scraper strip 6. The movable limiting pin 9 is located on the outer side of the end of the horizontal push rod 51.

[0018] One end of the tension spring 8 is set on the punch connecting block 4, and the other end is set on the vertical push rod 52. The fixed position of the end of the tension spring 8 on the vertical push rod 52 is below the height of the horizontal push rod 51. The purpose of this design is to realize the pull-back effect of the tension spring 8 on the push rod 5 during the subsequent pressing process.

[0019] The distance between the inner end faces of the two limiting support plates 7 is greater than the distance between the outer end faces of the two push rods 5, providing space for the push rods 5 to move; the vertical projection of the movable limiting pin 9 falls on the top end face of the limiting support plate 7, ensuring that the movable limiting pin 9 and the limiting support plate 7 can cooperate with each other, so that the limiting support plate 7 can limit the movable limiting pin 9.

[0020] like Figure 2 As shown, the bottom of the material box 1 has a groove 11 around its perimeter, and a nitrile rubber strip (not shown in the figure, fixed with glue) is embedded in the groove as a buffer base; the upper end face of the material box 1 is provided with a feeding port 12, which is connected to an external material hopper to realize the replenishment of material box 1.

[0021] A pressing hole 21 is provided on the middle die plate 2 at the position corresponding to the punch 3. The pressing hole 21 is located directly below the punch 3, and the size and shape of the pressing hole 21 match the size and shape of the punch 3.

[0022] This utility model device features grooves around the bottom of the material box 1, with a more wear-resistant and standard-sized nitrile rubber strip embedded around the perimeter as a buffer base, secured with adhesive. (The nitrile rubber strip is purchased through conventional channels at 5 yuan / meter; simple length adjustment with scissors is all that's needed during use.) This reduces the replacement cost from 600 yuan to 5 yuan. Furthermore, the thickness of the material box 1 is relatively reduced, decreasing the pressing CT time from 8 seconds (e.g., pressing a 16mm*8mm*0.6mm thick square sheet) to 7.5 seconds. This significantly reduces production costs and improves production efficiency.

[0023] This invention utilizes a self-cleaning component that moves with the upper punch assembly to prevent product adsorption on the end face of the punch 3. As shown in Figure 4, the specific working procedure is as follows: Connect the push rod 5 and the polyurethane scraper 6 to the punch connecting block 4, and then connect the push rod 5 to the punch connecting block 4 through the tension spring 8.

[0024] After the material box 1 is moved to the pressure hole 21 by the action of the cylinder, the punch 3 is ready to press down in the initial position. At this time, the polyurethane scraper is located on the end face of the punch, and the push rod is in a vertical position. Figure 4 The state shown in (1) is as follows.

[0025] During the downward pressing of the punch, the material box 1 gradually moves away from the pressure hole 21 under the action of the cylinder. After the movable limit pin 9 of the push rod 5 reaches the limit support plate 7, it drives the polyurethane scraper to move backward and away from the end face of the punch 3. The tension spring 8 tightens, giving the push rod 5 and the polyurethane scraper 6 a force to return to their original position. Figure 4 The states shown in (2)-(4) are as follows.

[0026] After the pressing action is completed, punch 3 moves upward under the control of the press, and material box 1 moves closer to the pressing hole 21 under the action of the cylinder. Push rod 5 and polyurethane scraper 6 return to their original positions under the action of tension spring 8, completing the cleaning action on the end face of punch 3. The punch assembly returns to its original position. Figure 4 The states shown in (5)-(6) are as follows.

[0027] It should be noted that this utility model device is mainly designed for pressing neodymium iron boron magnetic powder products. Similarly, other powder alloy pressing fields can also adopt similar solutions to optimize pressing equipment and achieve the same effect.

[0028] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A powder pressing device with a leak-proof material box and a self-cleaning punch, characterized in that, The assembly includes a material box (1), a punch assembly, a middle die plate (2), and a self-cleaning component. The material box (1) is mounted on the middle die plate (2) and is connected to a cylinder for controlling the movement of the material box (1). The punch assembly includes a punch (3) and a punch connecting block (4). The punch connecting block (4) is connected to the upper die plate of the press. The self-cleaning component is used to clean the end face of the punch (3) and includes a push rod (5), a polyurethane scraper (6), a limiting support plate (7), and a tension spring (8). A movable limiting pin (9) is provided on the outside of the push rod (5). The bottom of the material box (1) is provided with a groove (11) around its perimeter, and a nitrile rubber strip is embedded in the groove (11).

2. The powder pressing device with anti-leakage material box and self-cleaning punch function according to claim 1, characterized in that, There are two limiting support plates (7), which are symmetrically arranged on both sides of the middle mold plate (2). There are two push rods (5), which are rotatably and symmetrically arranged on both sides of the punch connecting block (4). The polyurethane scraper (6) is rotatably arranged at one end of the push rod (5) away from the punch connecting block (4). The polyurethane scraper (6) is located below the end face of the punch (3).

3. A powder pressing device with anti-leakage material box and self-cleaning punch function according to claim 2, characterized in that, The push rod (5) includes a horizontal push rod (51) and a vertical push rod (52) arranged perpendicularly to each other. One end of the vertical push rod (52) is rotatably connected to the punch connecting block (4), and the other end is rotatably connected to the polyurethane scraper strip (6). The movable limiting pin (9) is located on the outer side of the end of the horizontal push rod (51).

4. A powder pressing device with anti-leakage material box and self-cleaning punch function according to claim 2, characterized in that, One end of the tension spring (8) is set on the punch connecting block (4), and the other end is set on the vertical push rod (52). The fixed position of the end of the tension spring (8) on the vertical push rod (52) is below the height of the horizontal push rod (51).

5. A powder pressing device with anti-leakage material box and self-cleaning punch function according to claim 4, characterized in that, The distance between the inner top surfaces of the two limiting support plates (7) is greater than the distance between the outer surfaces of the two push rods (5); the vertical projection of the movable limiting pin (9) falls on the top surface of the limiting support plate (7), thereby making the limiting support plate (7) limit the movable limiting pin (9).

6. A powder pressing device with anti-leakage material box and self-cleaning punch function according to claim 1, characterized in that, The upper end face of the material box (1) is provided with a feeding port (12), which is connected to the external material silo.

7. A powder pressing device with anti-leakage material box and self-cleaning punch function according to claim 1, characterized in that, The punch (3) is vertically positioned below the punch connecting block (4).

8. A powder pressing device with anti-leakage material box and self-cleaning punch function according to claim 1, characterized in that, A pressing hole (21) is provided on the middle die plate (2) at the position corresponding to the punch (3), and the size and shape of the pressing hole (21) match the size and shape of the punch (3).

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