Drawing die exhaust structure of automobile shell part

Abstract

The utility model relates to the technical field of die processing, and provides an exhaust structure of an automobile shell part drawing die, which comprises a die sleeve component, the die sleeve component comprises an upper die, an exhaust passage communicated with the interior of the upper die, and a sealing component arranged at the exhaust passage, the lower jacking assembly is arranged on the exhaust channel and located above the sealing assembly and can elastically extrude with the sealing assembly to seal and close the exhaust channel, and the external screwing assembly is arranged above the lower jacking assembly and can be screwed and adjusted. According to the design, through triple innovation of elastic sealing, thread adjustment and modular disassembly, the core problems of unreliable sealing and single adjustment in comparison files are solved, meanwhile, the maintenance convenience is improved, and the service life is prolonged.

Description

Technical Field

[0001] This utility model relates to the field of mold processing technology, specifically to an exhaust structure for a stretching mold of an automotive body part. Background Technology

[0002] The stretching die for car body parts is a core process equipment for forming automotive body panels (such as engine hoods, doors, fenders, etc.). Its design directly affects the dimensional accuracy, surface quality, and production efficiency of the parts. The core purpose of die venting is to eliminate the negative impact of gas on product quality and production efficiency during the forming process. Specifically, this is reflected in the following aspects: 1. Avoiding surface defects: If air or volatile gases from the material are not discharged in time when the die is closed, bubbles, pores, or dark spots will form on the surface of the parts, resulting in poor appearance or even scrapping; 2. Preventing die damage: High-pressure gas may accelerate die wear, or even cause chipping or cracking, shortening the die life.

[0003] A search revealed that CN219806424U discloses a mold venting structure, including an upper mold body. Through slots are formed at both ends of the top of the upper mold body. A plug is fitted inside each through slot, and an L-shaped venting steel bar is fixedly connected inside each plug. A connecting slot is formed between the through slots. When the gas in the mold cavity increases, it pushes the plug upwards. When the plug moves to one end of the connecting slot, the gas in the mold cavity flows into the through slot and then through the L-shaped venting steel bar inside the plug into the connecting slot. The gas entering the connecting slot flows into the first venting slot and pushes the piston block upwards. It then flows through the arc-shaped connecting slot to the top of the first venting slot and is discharged through the first venting sleeve. During venting, molten material does not enter the through slots. The sealing column is extracted from the second venting sleeve and the second venting slot, allowing the gas in the mold cavity to enter the second venting slot through multiple venting steel columns and be discharged from the second venting slot and the second venting sleeve. Manual venting is possible.

[0004] The problem with the above-mentioned mold venting structure is that:

[0005] I. The design uses the sliding fit of L-shaped exhaust steel and plug column to achieve exhaust, but when the gas pressure fluctuates, the plug column may not reset in time, which may cause molten material to seep into the exhaust channel, causing blockage or surface defects.

[0006] Second, this design relies on a fixed exhaust path and cannot adjust the exhaust intensity or temporarily shut down the exhaust function according to the molding process requirements. Utility Model Content

[0007] This invention proposes an exhaust structure for a stretching mold of automotive body parts, which solves the problems of insufficient sealing reliability and poor adjustment flexibility in the prior art.

[0008] The technical solution of this utility model is as follows: an exhaust structure for a stretching mold of an automotive body part, comprising a mold sleeve assembly, the mold sleeve assembly comprising an upper mold and an exhaust channel communicating inside the upper mold, a sealing assembly disposed at the exhaust channel, a lower top assembly disposed above the exhaust channel and capable of elastically pressing with the sealing assembly to form a seal for the exhaust channel, and an external screwing assembly disposed above the lower top assembly and capable of being screwed and adjusted.

[0009] Preferably, the sealing assembly includes an inner seat, which is fixedly connected to the exhaust channel, and the sealing assembly also includes a ball groove, which is formed at the through slot at the top of the inner seat.

[0010] Preferably, the mold assembly further includes internal threads, which are distributed above the venting channel located on the inner seat.

[0011] Preferably, the external screwing assembly includes a lower connector and a threaded ring, wherein the lower connector is threadedly connected to the internal thread via the threaded ring.

[0012] Preferably, the external tightening assembly further includes a connecting rod, which is fixedly connected to the top of the lower connecting post, and the external tightening assembly further includes a tightening handle, which is fixedly connected to the top of the lower connecting post.

[0013] Preferably, the mold assembly further includes a first rubber ring and a second rubber ring, which are respectively fixedly connected to the exhaust channel at the upper and lower positions of the internal thread, and the inner sides of the first rubber ring and the second rubber ring are in contact with the lower connecting post.

[0014] Preferably, the external screwing assembly further includes a bearing, which is located at the bottom of the lower connector, and the outer ring of the bearing is fixedly connected to the lower connector.

[0015] Preferably, the lower support assembly includes a bellows fixedly connected to the inner ring of the bearing, the lower support assembly also includes a spherical cap fixedly connected to the bottom of the bellows, and the lower support assembly also includes a spring ring fixedly connected to the center of the top of the bellows.

[0016] The beneficial effects of this utility model are as follows:

[0017] 1. An external tightening component and a threaded adjustment structure with an internal thread and threaded ring are added. By rotating the handle, the clamping force of the spherical mandrel can be precisely controlled to adapt to different venting requirements, such as complete sealing during molding or dynamic adjustment during venting.

[0018] Second, through the elastic sealing structure of the spherical top and the ball groove, the spring ring + bellows achieves dynamic pressure adaptive sealing. After the gas pressure disappears, the spring ring automatically resets to prevent material backflow. Attached Figure Description

[0019] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0020] Figure 1 This is a schematic diagram of the overall device of this utility model;

[0021] Figure 2 This is a cross-sectional view of the upper mold of this utility model;

[0022] Figure 3 This is a schematic diagram of the handle and the lower top assembly of this utility model;

[0023] Figure 4 This is a schematic diagram of the spherical top and spring coil of this utility model;

[0024] In the diagram: 1. Mold sleeve assembly; 11. Upper mold; 12. Venting channel; 13. Internal thread; 14. First rubber ring; 15. Second rubber ring; 2. External screw assembly; 21. Tightening handle; 22. Connecting rod; 23. Lower connecting post; 24. Bearing; 231. Threaded ring; 3. Lower ejector assembly; 31. Bellows; 32. Spherical ejector; 33. Spring ring; 4. Sealing assembly; 41. Internal seat; 42. Ball groove. Detailed Implementation

[0025] The technical solutions of this utility model will be clearly and completely described below with reference to the embodiments of this utility model. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this utility model.

[0026] Please see Figure 1 and Figure 2 and Figure 3 and Figure 4 This utility model provides a technical solution: an exhaust structure for a stretching mold of an automotive body part, including a mold sleeve assembly 1, the mold sleeve assembly 1 including an upper mold 11 and an exhaust channel 12 communicating inside the upper mold 11, a sealing assembly 4 disposed at the exhaust channel 12, a lower top assembly 3 disposed above the exhaust channel 12 and capable of elastically pressing with the sealing assembly 4 to form a seal on the exhaust channel 12, and an external screwing assembly 2 disposed above the lower top assembly 3 and capable of being screwed and adjusted;

[0027] This design solves the core problems of unreliable sealing and limited adjustment in the comparison documents through three innovations: elastic sealing, threaded adjustment, and modular disassembly. At the same time, it improves maintenance convenience and service life.

[0028] Please see Figure 2The sealing assembly 4 includes an inner seat 41, which is fixedly connected to the exhaust channel 12. The sealing assembly 4 also includes a ball groove 42, which is opened at the top through slot of the inner seat 41.

[0029] Please see Figure 2 The mold assembly 1 also includes an internal thread 13, which is distributed on the exhaust channel 12 above the built-in seat 41;

[0030] Please see Figure 3 The external screwing assembly 2 includes a lower connector 23 and a threaded ring 231. The lower connector 23 is threadedly connected to the internal thread 13 through the threaded ring 231.

[0031] Please see Figure 3 The external screwing assembly 2 also includes a connecting rod 22, which is fixedly connected to the top of the lower connecting post 23. The external screwing assembly 2 also includes a screw handle 21, which is fixedly connected to the top of the lower connecting post 23.

[0032] By holding the handle 21 and turning the connecting rod 22 in both directions, the lower connecting post 23 and the threaded ring 231 can be vertically pushed into the internal thread 13.

[0033] An external screw-on assembly 2 and an internal thread 13 + threaded ring 231 of the thread adjustment structure are added. By rotating the screw handle 21, the clamping force of the spherical head can be precisely controlled to adapt to different venting requirements, such as complete sealing during molding or dynamic adjustment during venting.

[0034] The external screw-out assembly 2 and the lower top assembly 3 can be screwed out of the exhaust channel 12 as a whole, which is convenient for maintenance or replacement, such as when the spring coil 33 is aging, while the comparison document requires the disassembly of multiple parts.

[0035] Please see Figure 2 The mold assembly 1 also includes a first rubber ring 14 and a second rubber ring 15. The first rubber ring 14 and the second rubber ring 15 are respectively fixedly connected to the exhaust channel 12 at the upper and lower positions of the internal thread 13. The inner sides of the first rubber ring 14 and the second rubber ring 15 are in contact with the lower connecting post 23.

[0036] By providing a first rubber ring 14 and a second rubber ring 15 at the exhaust channel 12, the sealing performance of the lower connector 23 between the exhaust channels 12 can be increased, preventing gas from leaking outward from the lower connector 23.

[0037] In addition to the spherical top seal, a first rubber ring 14 and a second rubber ring 15 are added to enhance the static sealing between the lower connecting post 23 and the exhaust channel, preventing gas leakage.

[0038] Please see Figure 3 and Figure 4 The external screwing assembly 2 also includes a bearing 24, which is located at the bottom of the lower connecting post 23, and the outer ring of the bearing 24 is fixedly connected to the lower connecting post 23.

[0039] The lower push assembly 3 includes a bellows 31, which is fixedly connected to the inner ring of the bearing 24. The lower push assembly 3 also includes a spherical top 32, which is fixedly connected to the bottom of the bellows 31. The lower push assembly 3 also includes a spring ring 33, which is fixedly connected to the center of the top of the bellows 31.

[0040] The spherical head 32 is matched with the size of the ball groove 42. By providing a bearing 24 between the lower connecting column 23 and the bellows 31, when the lower connecting column 23 rotates and advances in the exhaust channel 12, the bellows 31 and the spherical head 32 will only advance in a straight line in the exhaust channel 12, and will not rotate synchronously with the lower connecting column 23. This design can reduce the friction and wear between the spherical head 32 and the ball groove 42, thereby reducing the sealing performance.

[0041] The spherical top 32 and the ball groove 42 form an elastic sealing structure with spring ring 33 and bellows 31, achieving dynamic pressure adaptive sealing. The spring ring automatically resets after the gas pressure disappears, preventing material backflow.

[0042] The spring coil 33 can be protected by providing a bellows 31 at the spring coil 33 and the lower connecting post 23.

[0043] Working principle:

[0044] When the molten material enters the upper mold 11 after it is closed with the lower mold, the pressure inside the cavity increases and the gas is discharged outward from the exhaust channel 12.

[0045] When the gas passes through the built-in seat 41, it will push against the spherical head 32. At this time, the spherical head 32 is temporarily separated from the ball groove 42, and the gas can pass through the built-in seat 41 and be discharged outward from the exhaust channel 12.

[0046] When the gas is discharged, the spring coil 33 completes its elastic reset and drives the spherical top 32 to press against the ball groove 42 again, at which point the ball groove 42 is in a closed state.

[0047] Operators can adjust the working mode of the lower top component 3 at the sealing component 4 by turning the handle 21 in both directions:

[0048] 1. When the upper mold 11 and the lower mold are closed and in the pressing state, the handle 21 can be held and the connecting rod 22 can be turned in the right direction. At this time, the lower connecting post 23 moves down at the exhaust channel 12. At this time, the spring ring 33 at the lower connecting post 23 and the spherical mandrel 32 is fully compressed. This design can prevent the spherical mandrel 32 from being accidentally pushed open by gas.

[0049] 2. When the upper mold 11 and the lower mold are closed and in the venting state, the connecting rod 22 can be reversed to adjust the compression degree of the spring ring 33, thereby adapting to different venting intensities;

[0050] 3. When the upper mold 11 is not in operation, the connecting rod 22 can be reversed until the external twisting component 2 and the lower ejector component 3 are completely disengaged from the exhaust channel 12. At this time, the maintenance work of the external twisting component 2 and the lower ejector component 3 can be completed.

[0051] The above are merely preferred embodiments of the present utility model and are not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A venting structure for a stretching die of an automotive body component, comprising a die sleeve assembly (1), characterized in that, The mold assembly (1) includes an upper mold (11) and an exhaust channel (12) connected inside the upper mold (11), a sealing assembly (4) disposed at the exhaust channel (12), a lower top assembly (3) disposed above the exhaust channel (12) and capable of elastically pressing with the sealing assembly (4) to form a seal to close the exhaust channel (12), and an external screw assembly (2) disposed above the lower top assembly (3) and capable of being screwed and adjusted.

2. The exhaust structure for a stretching die of an automotive body part according to claim 1, characterized in that, The sealing assembly (4) includes an inner seat (41), which is fixedly connected to the exhaust channel (12). The sealing assembly (4) also includes a ball groove (42), which is opened at the top through slot of the inner seat (41).

3. The exhaust structure for a stretching die of an automotive body component according to claim 1, characterized in that, The mold assembly (1) also includes an internal thread (13) which is distributed above the exhaust channel (12) located on the inner seat (41).

4. The exhaust structure for a stretching die of an automotive body part according to claim 3, characterized in that, The external screw assembly (2) includes a lower connector (23) and a threaded ring (231), wherein the lower connector (23) is threadedly connected to the internal thread (13) via the threaded ring (231).

5. The exhaust structure for a stretching die of an automotive body part according to claim 4, characterized in that, The external screwing assembly (2) also includes a connecting rod (22), which is fixedly connected to the top of the lower connecting post (23). The external screwing assembly (2) also includes a screw handle (21), which is fixedly connected to the top of the lower connecting post (23).

6. The exhaust structure for a stretching die of an automotive body part according to claim 4, characterized in that, The mold assembly (1) further includes a first rubber ring (14) and a second rubber ring (15). The first rubber ring (14) and the second rubber ring (15) are respectively fixedly connected to the exhaust channel (12) at the upper and lower positions of the internal thread (13). The inner sides of the first rubber ring (14) and the second rubber ring (15) are in contact with the lower connecting post (23).

7. The exhaust structure for a stretching die of an automotive body part according to claim 4, characterized in that, The external screw assembly (2) also includes a bearing (24), which is located at the bottom of the lower connecting post (23), and the outer ring of the bearing (24) is fixedly connected to the lower connecting post (23).

8. The exhaust structure for a stretching die of an automotive body part according to claim 7, characterized in that, The lower support assembly (3) includes a bellows (31) which is fixedly connected to the inner ring of the bearing (24). The lower support assembly (3) also includes a spherical head (32) which is fixedly connected to the bottom of the bellows (31). The lower support assembly (3) also includes a spring ring (33) which is fixedly connected to the center of the top of the bellows (31).

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