Progressive die for punching without connecting knife edge marks

Abstract

A progressive die for punching without connecting knife edge marks comprises an upper die part and a lower die part, a punching punch capable of moving up and down and an ejector plate are arranged at the bottom of the upper die part, and an inner stripper plate capable of elastically moving up and down and a discharging port are arranged on the lower die part. When the punching punch punches the workpiece downwards, the workpiece is separated from the connecting material belt, the inner stripper plate is pushed to move downwards, and after the punching punch resets upwards, the inner stripper plate elastically resets upwards, and the workpiece is jacked upwards to return into the connecting material belt. And when the ejector plate moves downwards, the workpieces returning upwards to the interior of the connecting material belt are ejected downwards to the discharging opening. According to the progressive die, a material connecting point of a traditional material connecting belt can be omitted, so that when the product and the material connecting belt are punched and separated, the product does not have a notch trace of a connecting cutter, burrs are reversely pressed while the inner stripper plate ejects out the product, and therefore the manufactured product is smooth and more attractive, and the production efficiency is improved. And meanwhile, the structure can be suitable for products with thicker materials and high trimming smoothness requirements.

Description

Technical Field

[0001] The utility model relates to the technical field of continuous dies, in particular to a continuous die capable of punching without cutting edge marks. Background Art

[0002] When designing a continuous mold, when the product is connected to the material strip during the process, the normal connecting material strip must be connected at the material point to carry the product to achieve continuity. In this way, when the waste material connected to the product is separated from the product by punching in the last step of the mold, the product will have a notch mark of the connecting knife, which makes the edge line of the product uneven and affects the appearance. If the product material is relatively thick (more than 4MM) and the trimming smoothness requirements are high, the continuous mold cannot be realized. If it is designed as a single-process mold, there are many processes, and N equipment and N labor positions must be added, which leads to low production efficiency and high manufacturing costs.

[0003] Therefore, further improvements are necessary. Utility Model Content

[0004] The purpose of the utility model is to provide a continuous die for punching without cutting edge marks, which has simple structure, good product quality, high production efficiency, low manufacturing cost and strong practicality, so as to overcome the shortcomings of the existing technology.

[0005] A continuous die designed for punching without cutting edge marks is designed for this purpose, comprising an upper die part and a lower die part, and is characterized in that: a punching punch and a ejector plate that can move up and down are provided at the bottom of the upper die part, and an inner stripper plate that can move up and down elastically is provided on the lower die part, and a discharge port; when the punching punch punches the workpiece downward, the workpiece is separated from the connecting material belt and pushes the inner stripper plate to move downward; after the punching punch is reset upward, the inner stripper plate elastically resets upward and pushes the workpiece upward back into the connecting material belt; when the ejector plate moves downward, the workpiece that has returned upward in the connecting material belt is ejected downward to the discharge port.

[0006] A pressing plate is provided at the bottom of the upper die part, and the pressing plate presses the workpiece downward when the upper die part and the lower die part are closed.

[0007] An elastic member is provided in the lower mold part, one end of the elastic member elastically acts on the inner stripper plate, and the inner stripper plate compresses the elastic member when it moves downward, and the inner stripper plate moves upward and resets under the elastic force of the elastic member.

[0008] A movable cavity is provided in the lower die part, and an inner stripper plate is movably provided on the movable cavity; when the punching punch punches the workpiece downward, the workpiece moves downward into the movable cavity.

[0009] A guide column is provided on the movable cavity. The guide column passes through the inner stripper plate. The inner stripper plate moves upward and downward along the guide column on the movable cavity.

[0010] The inner stripper plate is provided with an avoidance groove that matches the shape of the workpiece. When the punching punch punches the workpiece downward, the workpiece is located on the avoidance groove, and the workpiece pushes the inner stripper plate downward through the avoidance groove.

[0011] A material receiving chute is provided at the bottom of the lower die part, and the material receiving chute is located below the discharge port; when the ejector plate moves downward to eject the workpiece in the upwardly returning material belt downward to the discharge port, the workpiece falls into the material receiving chute through the discharge port.

[0012] The upper die part includes an upper die base, an upper pad, an upper clamping plate, a stop plate and an upper die plate which are arranged in sequence up and down. The punching punch and the ejector plate are movably arranged on the upper die plate, and the pressure plate is arranged in the upper die plate.

[0013] The lower die part includes a lower template, a lower pad, a lower die base, a lower pad and a lower support plate which are arranged in sequence up and down. The inner stripper plate is movably arranged on the lower template. A discharge port is provided between the lower template, the lower pad and the lower die base.

[0014] A mounting hole is provided between the lower pad and the lower die base, the elastic member is installed on the mounting hole, and the elastic member is provided between the inner stripper plate and the lower die base.

[0015] The continuous die of the present invention is provided with a punching punch and a ejector plate that can move up and down at the bottom of the upper die part, and an inner stripper plate that can move up and down elastically and a discharge port are provided on the lower die part. When the product is separated, the punching punch punches the product downward to separate the product from the connecting material belt, and then the inner stripper plate presses back to push the product back into the connecting material belt, and then the next step is to eject the product to the discharge port through the ejector plate; this structure can eliminate the connecting point of the traditional connecting material belt, so that when the product is punched and separated from the connecting material belt, there is no trace of the notch of the knife on the product, and when the inner stripper plate ejects the product, it also presses back on the burrs, so that the product made in this way is smoother and more beautiful. At the same time, this structure is suitable for products with relatively thick materials and high requirements for trimming smoothness. Therefore, such products do not need to design a single-process die, which can reduce the cost of opening N sets of molds, N processes, N equipment and N manpower, saving time and labor, while reducing costs and improving production efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional view of the upper mold part in one embodiment of the present utility model.

[0017] Figure 2 It is a cross-sectional view of the lower mold part in one embodiment of the present utility model.

[0018] Figure 3 It is a cross-sectional view of a continuous die in one embodiment of the present invention.

[0019] Figure 4 This is a schematic diagram of the overall structure of the continuous mold in one embodiment of the present utility model.

[0020] Figure 5 This is a schematic diagram of the overall structure of the upper mold part in one embodiment of the present utility model.

[0021] Figure 6 This is a schematic diagram of the overall structure of the lower mold part in one embodiment of the present utility model.

[0022] Figure 7 This is a process material strip diagram of a continuous mold in one embodiment of the present utility model. DETAILED DESCRIPTION

[0023] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0024] See also Figure 1-Figure 7 The continuous die for punching without cutting edge marks comprises an upper die part 1 and a lower die part 2. A punching punch 3 and a material ejector plate 4 that can move up and down are provided at the bottom of the upper die part 1. An inner stripper plate 5 that can move up and down elastically and a material discharge port 6 are provided on the lower die part 2. A pressing plate 9 is provided at the bottom of the upper die part 1. When the upper die part 1 and the lower die part 2 are closed, the pressing plate 9 presses the workpiece 7 downward. When the product is separated, the pressing plate 9 presses the workpiece 7, and the punching punch 3 punches the workpiece 7 downward to separate the workpiece 7 from the continuous material belt 8. The punching punch 3 pushes the workpiece 7 through the workpiece 7. When the workpiece 7 is under the ejector plate 4, the ejector plate 4 moves downward, and the workpiece 7 that has returned to the continuous material belt 8 is ejected downward to the discharge port 6; through the above structure, when the product is punched and separated from the continuous material belt 8, there is no notch trace on the product, and the shape of the product can be achieved, which reduces N sets of molds, improves production efficiency, saves punching machines, saves labor and saves electricity.

[0025] An elastic part 10 is provided in the lower mold part 2. The elastic part 10 is a nitrogen spring. The upper end of the elastic part 10 elastically acts on the inner stripper plate 5. When the inner stripper plate 5 moves downward, the elastic part 10 is compressed. The inner stripper plate 5 moves upward and reset under the elastic force of the elastic part 10.

[0026] A movable cavity 11 is provided in the lower die portion 2 , and the inner stripper plate 5 is movably provided on the movable cavity 11 ; when the punching punch 3 punches the workpiece 7 downward, the workpiece 7 moves downward into the movable cavity 11 .

[0027] A guide post 12 is provided on the movable cavity 11 . The guide post 12 passes through the inner stripper plate 5 . The inner stripper plate 5 moves up and down on the movable cavity 11 along the guide post 12 .

[0028] A clearance groove 14 matching the shape of the workpiece 7 is provided on the top of the inner stripper plate 5. When the punching punch 3 punches the workpiece 7 downward, the workpiece 7 is located on the clearance groove 14, and the workpiece 7 pushes the inner stripper plate 5 to move downward through the clearance groove 14.

[0029] The punching punch 3 and the ejector plate 4 are driven by a hydraulic device (such as a hydraulic cylinder) on the punch press. The above structure is prior art and will not be described in detail here.

[0030] A material receiving chute 13 is provided at the bottom of the lower mold part 2, and the material receiving chute 13 is located below the discharge port 6; when the ejector plate 4 moves downward to eject the workpiece 7 in the upward returning material belt 8 downward to the discharge port 6, the workpiece 7 falls into the material receiving chute 13 through the discharge port 6, and then slides downward through the material receiving chute 13 to the discharge position.

[0031] A waste chute 26 is provided on one side of the lower die portion 2 , and the waste from the material belt 8 falls into the waste chute 26 and then slides downward through the waste chute 26 to the waste area.

[0032] The upper die part 1 includes an upper die base 15, an upper pad 16, an upper clamping plate 17, a stop plate 18 and an upper template 19 which are arranged in sequence. The punching punch 3 and the ejector plate 4 are movably arranged on the upper template 19, and the pressure plate 9 is arranged in the upper template 19.

[0033] The lower mold part 2 includes a lower mold plate 20, a lower pad 21, a lower mold base 22, a lower pad 23 and a lower support plate 24 which are arranged in sequence up and down. The inner stripper plate 5 is movably arranged on the lower mold plate 20 up and down. A discharge port 6 is provided between the lower mold plate 20, the lower pad 21 and the lower mold base 22; the movable cavity 11 is provided inside the blade of the lower mold plate 20, the material receiving chute 13 is fixed on the lower pad 23, and the waste chute 26 is fixed on the lower mold base 22.

[0034] A mounting hole 25 is provided between the lower pad 21 and the lower die base 22 , and the elastic member 10 is mounted on the mounting hole 25 . The elastic member 10 is disposed between the inner stripper plate 5 and the lower die base 22 .

[0035] The continuous die is provided with a first punching station 27, a second punching station 28, a first idle step station 29, a first stretching station 30, a third punching station 31, a second idle step station 32, a second stretching station 33, a shaping station 34, a embossing station 35, a product separation station 36 and a product ejection station 37 from left to right. The punching punch 3 and the inner stripper plate 5 are arranged on the product separation station 36, and the ejector plate 4 and the discharge port 6 are arranged on the product ejection station 37. When the continuous material belt 8 is conveyed from left to right, the continuous die performs a process of punching-punching-stretching-punching-stretching-shaping-embossing-product separation-product ejection on the workpiece 7 in sequence.

[0036] The above is a preferred embodiment of the present invention, which illustrates and describes the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are merely illustrative of the principles of the present invention. Various changes and improvements may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and improvements are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A continuous die for punching without cutting edge marks, comprising an upper die portion (1) and a lower die portion (2), characterized in that: The bottom of the upper die part (1) is provided with a punching punch (3) and a ejector plate (4) that can move up and down, and the lower die part (2) is provided with an inner stripper plate (5) that can move up and down elastically, and a discharge port (6); when the punching punch (3) punches the workpiece (7) downward, the workpiece (7) is separated from the connecting material belt (8) and the inner stripper plate (5) is pushed to move downward; after the punching punch (3) is reset upward, the inner stripper plate (5) is reset upward elastically and pushes the workpiece (7) upward back into the connecting material belt (8); when the ejector plate (4) moves downward, the workpiece (7) that has returned upward in the connecting material belt (8) is ejected downward to the discharge port (6).

2. The continuous die for punching without cutting edge marks according to claim 1, characterized in that: A pressing plate (9) is provided at the bottom of the upper die part (1), and the pressing plate (9) presses the workpiece (7) downward when the upper die part (1) and the lower die part (2) are closed.

3. The continuous die for punching without cutting edge marks according to claim 1, characterized in that: An elastic member (10) is provided in the lower mold part (2), and one end of the elastic member (10) elastically acts on the inner stripper plate (5). When the inner stripper plate (5) moves downward, the elastic member (10) is compressed, and the inner stripper plate (5) moves upward and resets under the elastic force of the elastic member (10).

4. The continuous die for punching without cutting edge marks according to claim 1, characterized in that: A movable cavity (11) is provided in the lower die portion (2), and an inner stripper plate (5) is movably provided on the movable cavity (11) up and down; when the punching punch (3) punches the workpiece (7) downward, the workpiece (7) moves downward into the movable cavity (11).

5. The continuous die for punching without cutting edge marks according to claim 1, characterized in that: A guide post (12) is provided on the movable cavity (11), the guide post (12) passes through the inner stripper plate (5), and the inner stripper plate (5) moves upward and downward along the guide post (12) on the movable cavity (11).

6. The continuous die for punching without cutting edge marks according to claim 1, characterized in that: The inner stripper plate (5) is provided with a clearance groove (14) matching the shape of the workpiece (7). When the punching punch (3) punches the workpiece (7) downward, the workpiece (7) is located on the clearance groove (14), and the workpiece (7) pushes the inner stripper plate (5) to move downward through the clearance groove (14).

7. The continuous die for punching without cutting edge marks according to claim 1, characterized in that: A material receiving chute (13) is provided at the bottom of the lower mold part (2), and the material receiving chute (13) is located below the discharge port (6); when the ejector plate (4) moves downward to eject the workpiece (7) in the upward returning material belt (8) downward to the discharge port (6), the workpiece (7) falls into the material receiving chute (13) through the discharge port (6).

8. The continuous die for punching without cutting edge marks according to claim 2, characterized in that: The upper die portion (1) comprises an upper die base (15), an upper pad (16), an upper clamping plate (17), a stop plate (18) and an upper die plate (19) which are sequentially arranged in an upper and lower order. The punching punch (3) and the ejector plate (4) are movably arranged on the upper die plate (19) in an upper and lower direction, and the pressing plate (9) is arranged in the upper die plate (19).

9. The continuous die for punching without cutting edge marks according to claim 3, characterized in that: The lower die portion (2) comprises a lower die plate (20), a lower pad (21), a lower die base (22), a lower pad (23) and a lower support plate (24) which are arranged in sequence up and down. An inner stripper plate (5) is movably arranged on the lower die plate (20) up and down. A discharge port (6) is provided between the lower die plate (20), the lower pad (21) and the lower die base (22).

10. The continuous die for punching without cutting edge marks according to claim 9, characterized in that: A mounting hole (25) is provided between the lower pad (21) and the lower die base (22), the elastic member (10) is mounted on the mounting hole (25), and the elastic member (10) is provided between the inner stripper plate (5) and the lower die base (22).

Images