A time delay device for a mould press

Abstract

The utility model relates to a kind of for mould pressing material's delay device, belong to automobile mould field, including upper die seat (1) and female die (2), the upper die seat (1) bottom is equipped with pressing mechanism (3), wrinkles area is pressed before forming, the pressing mechanism (3) includes mounting plate (4) and shell (5), the mounting plate (4) and upper die seat (1) are connected, the mounting plate (4) bottom is connected with limit block (6), the limit block (6) is arranged on shell (5), the shell (5) inside is equipped with first nitrogen cylinder (7), the shell (5) bottom is equipped with pressing block (8), the pressing block (8) bottom and female die (2) are pasted. Pressing mechanism (3) inside is equipped with first nitrogen cylinder (7), press machine goes up, when upper die seat (1) opens, delay switch (12) realizes nitrogen cylinder delay pops out, prevent part deformation.

Description

Technical Field

[0001] This utility model belongs to the field of automotive molds. Specifically, this utility model relates to a delay device for mold pressing. Background Technology

[0002] In the process of forming the roof fin of an automotive mold, severe wrinkling occurs in some areas of the shark fin. The upper die needs an additional pressure mechanism to hold the wrinkled areas of the blank in place before forming begins. However, current technology encounters issues where the air cushion under the drawing press lacks self-locking functionality, making it impossible to design a pressure feeder in the upper die. Otherwise, the upper pressure feeder would not self-lock when the press opens, damaging the part. Alternatively, a wedge mechanism could be added between the pressure ring and the upper die to achieve self-locking of the upper pressure feeder. When the die opens, the pressure ring would push the upper pressure feeder open, enabling normal production. This mechanism requires the entire upper die to be divided into pressure feeders and needs to provide a large pressure force, resulting in high costs. Furthermore, the pressure feeder strength is insufficient, and the die cannot be pressed without the part, as this poses a risk of die breakage.

[0003] A search revealed that Chinese patent CN218425265U, published on February 3, 2023, discloses a stamping die blanking mechanism. The mechanism includes an upper fixed base and a lower fixed base. A wedge assembly is slidably mounted on the lower fixed base and is slidably connected to the upper fixed base. A mounting block is installed on the wedge assembly, and a blanking component is mounted on the wedge assembly. The blanking component is attached to the mounting block. However, this structure requires a large blanking force, resulting in high costs and insufficient strength of the blanking device. Utility Model Content

[0004] The present invention aims to provide a time-delay device for pressing materials in molds and preventing wrinkling of parts.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a delay device for die pressing, comprising an upper die base and a die cavity, wherein a pressing mechanism is provided at the bottom of the upper die base and the pressing mechanism is disposed on the die cavity; the pressing mechanism includes a mounting plate and a housing, the mounting plate being connected to the upper die base, the mounting plate and the housing being connected by a limiting block, the limiting block being disposed on the housing, and a first nitrogen cylinder being disposed inside the housing; a pressing block is provided at the bottom of the housing, the bottom of the pressing block being in contact with the die cavity; a lower die base is provided at the bottom of the upper die base, the lower... A pressure ring is provided between the mold base and the die cavity; one end of the pressure ring is provided with a base, and a time delay switch is provided on the base. The time delay switch and the first nitrogen cylinder are connected through a pipeline; the time delay switch includes a touch switch and a moving rod. The touch switch is connected to a first roller and a second roller respectively. One end of the moving rod is located between the first roller and the second roller, and the other end of the moving rod is connected to the base; the first nitrogen cylinder is provided with a ventilation pipeline and an inflation pipeline. The ventilation pipeline and the inflation pipeline are connected through a gas valve, and the gas valve is connected to a gas switch.

[0006] The shell is surrounded by support columns, and a second nitrogen cylinder is located at the bottom of the support columns.

[0007] The outer side of the housing is provided with a guide plate, and the inner side of the housing is provided with a connecting plate, which is connected to the guide plate.

[0008] Multiple sets of the first nitrogen cylinder and the second nitrogen cylinder are provided, and multiple sets of the limiting block and the guide plate are provided.

[0009] The technical effect of this utility model is as follows: By setting a pressing mechanism on the upper mold base, the wrinkled area of ​​the blank forming part is pressed down before the forming begins. The pressing mechanism is equipped with a first nitrogen cylinder. When the press moves upward and the upper mold base opens, a delay switch is set. The nitrogen cylinder pops out after a delay, the pressing mechanism pops out after a delay, and the pressing ring is further lifted up. The part is lifted up together, realizing the removal of the part without deformation. Small second nitrogen cylinders are set around the pressing mechanism to overcome the self-weight of the entire pressing mechanism and prevent the pressing mechanism from deforming the part due to its own weight when the mold is just opened. Attached Figure Description

[0010] This manual includes the following figures, which illustrate the following: Figure 1 This is a schematic diagram of a delay device for die pressing.

[0011] Figure 2 for Figure 1 A schematic diagram showing the structure after removing the upper mold base section;

[0012] Figure 3 for Figure 2 Rear view;

[0013] Figure 4 for Figure 1 Schematic diagram of the intermediate pressure material mechanism;

[0014] Figure 5 for Figure 1 Schematic diagram of the intermediate delay switch section.

[0015] The markings in the diagram are as follows: 1. Upper mold base; 2. Die; 3. Pressing mechanism; 4. Mounting plate; 5. Housing; 6. Limiting block; 7. First nitrogen cylinder; 8. Pressing block; 9. Lower mold base; 10. Pressing ring; 11. Base; 12. Delay switch; 13. Touch switch; 14. Moving rod; 15. First roller; 16. Second roller; 17. Ventilation pipe; 18. Inflation pipe; 19. Gas valve; 20. Gas switch; 21. Support column; 22. Second nitrogen cylinder; 23. Guide plate; 24. Connecting plate. Detailed Implementation

[0016] The specific embodiments of this utility model will be further described in detail below with reference to the accompanying drawings, in order to help those skilled in the art to have a more complete, accurate and in-depth understanding of the inventive concept and technical solution of this utility model, and to facilitate its implementation.

[0017] like Figure 1 As shown, a delay device for die pressing includes an upper die base 1 and a die cavity 2. A pressing mechanism 3 is provided at the bottom of the upper die base 1 and is mounted on the die cavity 2. By providing the pressing mechanism 3 on the upper die base 1, the wrinkled area is pressed down before molding begins.

[0018] like Figure 2 , Figure 4 and Figure 4 As shown, the pressing mechanism 3 includes a mounting plate 4 and a housing 5. The mounting plate 4 is connected to the upper mold base 1, and a limiting block 6 is connected to the bottom of the mounting plate 4. The mounting plate 4 and the housing 5 are connected through the limiting block 6. A first nitrogen cylinder 7 is provided inside the housing 5. The pressing mechanism 3 is connected to the upper mold base 1 through the mounting plate 4, so that the press drives the upper mold base 1 to move upward, and the pressing mechanism 3 moves upward with the upper mold base 1. The limiting block 5 is set between the mounting plate 4 and the housing 5. A first nitrogen cylinder 7 is provided inside the housing 5. In this embodiment, two large first nitrogen cylinders 7 are provided. The upper mold base 1 drives the mounting plate 4 to move upward, and the first nitrogen cylinder 7 is used to delay the lifting of the pressing mechanism 3.

[0019] The bottom of the housing 5 is provided with a pressure block 8, the bottom of which fits into the die 2. The shark fin of the car roof has severe wrinkling in some areas. The pressure block 8 is triangular in shape and fits into the die 2 to press down the wrinkled area.

[0020] The upper mold base 1 has a lower mold base 9 at its bottom, and a pressure ring 10 is provided between the lower mold base 9 and the die 2. When the sheet metal is subjected to the tension of the die 2, the edge area will wrinkle, and the pressure ring 10 can achieve stable forming of the part.

[0021] The pressure ring 10 has a base 11 at one end, and a delay switch 12 is provided on the base 11. The delay switch 12 is connected to the first nitrogen cylinder 7 through a pipeline. The delay switch 12 on the base 11 controls the first nitrogen cylinder 7 to pop out after a delay.

[0022] like Figure 5 As shown, the delay switch 12 includes a touch switch 13 and a moving rod 14. The touch switch 13 is connected to a first roller 15 and a second roller 16. One end of the moving rod 14 is positioned between the first roller 15 and the second roller 16, and the other end of the moving rod 14 is connected to the base 11. The base 11 is connected to the moving rod 14. When the moving rod 14 contacts the first roller 15 and the second roller 16 on both sides, the touch switch 13 is activated. When the press moves upward, driving the upper mold base 1 upward, the first roller 15 and the second roller 16 move upward. When the moving rod 14 is not in contact with the first roller 15 and the second roller 16 on both sides, the touch switch 13 is not activated. The distance that the moving rod 14 moves relative to the touch switch 13 is the stroke of the delay switch 12. When the stroke of the delay switch 12 ends, the first nitrogen cylinder 7 is ejected.

[0023] The first nitrogen cylinder 7 is equipped with a ventilation pipe 17 and a filling pipe 18, which are connected by a gas valve 19. The gas valve 19 is connected to a gas switch 20. The gas switch 20 controls the opening and closing of the gas valve 19, which, through the ventilation pipe 17 and the filling pipe 18, enables the first nitrogen cylinder 7 to receive and release gas. The gas valve 19 is a one-way valve, controlling the on / off state, flow rate, or direction of the gas flow. The gas switch 20 provides simple control over the gas flow.

[0024] The housing 5 is surrounded by support columns 21, and a second nitrogen cylinder 22 is located at the bottom of the support columns 21. The second nitrogen cylinder 22 is a small nitrogen cylinder used to overcome the weight of the entire pressing mechanism 3. When the upper mold base 1 moves upward, it drives the mounting plate 4 upward. At this time, the pressing mechanism 3 cannot move downward quickly. This is equivalent to the existing technology where the upper mold cannot be equipped with a pressure feeder. Otherwise, when the mold is opened, the upper pressure feeder cannot lock itself and will crush the part. The second nitrogen cylinder 22 plays a self-locking role to prevent the part from being crushed when the mold is opened. When the press moves upward, the upper mold base opens, the nitrogen cylinder pops out after a delay, the pressing mechanism pops out after a delay, and the pressing ring is further lifted up, and the part is lifted up together to achieve deformation-free part removal.

[0025] A guide plate 23 is provided on the outer side of the housing 5, and a connecting plate 24 is provided inside the housing 5. The connecting plate 24 and the guide plate 23 are connected. Guide plates 23 are provided on all four sides of the housing 5. The connecting plate 24 inside the housing 5 is connected to the limiting block 6. The upper mold base 1 drives the mounting plate 4, the limiting block 6, and the connecting plate 24 to move vertically. The guide plate 23 is connected to the connecting plate 24, and the guide plate 23 is located on the outer side of the housing 5 to ensure that the pressing mechanism 3 moves only vertically.

[0026] Multiple sets of the first nitrogen cylinder 7 and the second nitrogen cylinder 22 are provided, as are multiple sets of the limiting block 6 and the guide plate 23. In this embodiment, two sets of first nitrogen cylinders 7 and four sets of second nitrogen cylinders 22 are provided, along with four limiting blocks 6 and four guide plates 23.

[0027] The working principle of this utility model is as follows: A delay device for die pressing, the pressing mechanism 3 includes a mounting plate 4 and a housing 5. The mounting plate 4 is connected to the upper die base 1. A limit block 6 is connected to the bottom of the mounting plate 4. The limit block 6 is set on the housing 5. A first nitrogen cylinder 7 is provided inside the housing 5. Support columns 21 are provided around the housing 5. A second nitrogen cylinder 22 is provided at the bottom of the support columns 21. A pressing block 8 is provided at the bottom of the housing 5. The bottom of the pressing block 8 is in contact with the die 2. The delay switch 12 and the first nitrogen cylinder 7 are connected by a pipeline. The delay switch 12 includes a touch switch 13 and a moving rod 14. The touch switch 13 is connected to a first roller 15 and a second roller 16 respectively. One end of the moving rod 14 is set between the first roller 15 and the second roller 16. The other end of the moving rod 14 is connected to a base 11. The base 11 is set on the pressing ring 10. As the press descends, the pressure ring 10 presses down on the edge of the sheet metal, and the pressing mechanism 3 further presses down on the local wrinkled areas. The air circuit switch 20 controls the air circuit valve 19 to compress the first nitrogen cylinder 7. At the same time, the moving rod 14 of the delay switch 12 contacts the first roller 15 and the second roller 16 on both sides, and the mold reaches the bottom, and the part is formed. As the press ascends, the upper mold base 1 opens, driving the mounting plate 4 to rise. The delay switch 12 controls the first nitrogen cylinder 7 to rebound after a delay. At this time, the housing 5 of the pressing mechanism 3 and the pressing block 8 do not immediately pop out. During this process, the second nitrogen cylinder 22 plays a role in overcoming the weight of the pressing mechanism 3 and preventing the pressing mechanism 3 from crushing the part when the mold opens. As the upper mold base 1 rises, after the delay switch 12 has completed its stroke, the first nitrogen cylinder 7 pops out, the pressing mechanism 3 pops out, and the pressure ring 10 lifts up, lifting the part together to achieve deformation-free part removal.

[0028] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A delay device for die pressing, characterized in that: The assembly includes an upper mold base (1) and a die (2). The upper mold base (1) is provided with a pressing mechanism (3) at its bottom, which is located above the die (2). The pressing mechanism (3) includes a mounting plate (4) and a housing (5). The mounting plate (4) is connected to the upper mold base (1), and a limiting block (6) is connected to the bottom of the mounting plate (4). The mounting plate (4) and the housing (5) are connected by the limiting block (6). A first nitrogen cylinder (7) is provided inside the housing (5). A pressing block (8) is provided at the bottom of the housing (5), and the bottom of the pressing block (8) fits against the die (2). A lower mold base (9) is provided at the bottom of the upper mold base (1), and a pressing ring (10) is provided between the lower mold base (9) and the die (2). One end of the pressing ring (10) is provided with a pressing ring. There is a base (11), on which a delay switch (12) is provided. The delay switch (12) and the first nitrogen cylinder (7) are connected by a pipeline. The delay switch (12) includes a touch switch (13) and a moving rod (14). The touch switch (13) is connected to a first roller (15) and a second roller (16) respectively. One end of the moving rod (14) is located between the first roller (15) and the second roller (16), and the other end of the moving rod (14) is connected to the base (11). The first nitrogen cylinder (7) is provided with a ventilation pipeline (17) and a filling pipeline (18). The ventilation pipeline (17) and the filling pipeline (18) are connected by a gas valve (19). The gas valve (19) is connected to a gas switch (20).

2. The delay device for die pressing according to claim 1, characterized in that: The shell (5) is provided with support columns (21) around its perimeter, and a second nitrogen cylinder (22) is provided at the bottom of the support columns (21).

3. The delay device for die pressing according to claim 2, characterized in that: The outer side of the housing (5) is provided with a guide plate (23), and the inner side of the housing (5) is provided with a connecting plate (24). The connecting plate (24) and the guide plate (23) are connected.

4. The delay device for die pressing according to claim 3, characterized in that: The first nitrogen cylinder (7) and the second nitrogen cylinder (22) are both set in multiple sets, and the limiting block (6) and the guide plate (23) are both set in multiple sets.

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