Stamping part dirt flushing device

Abstract

The utility model relates to the technical field of stamping part flushing, and provides a stamping part dirt flushing device which comprises a working table, conveying assemblies are arranged at the two ends of the working table, a circulating water tank is arranged in the middle of the working table, and sliding grooves are formed in the two sides of the middle of the working table. After a stamping part is conveyed to a designated position through a conveying part, a second motor is started to drive a first gear to rotate, so that a chain drives a connecting block to move, when the connecting block moves to the position of the stamping part, an air cylinder is started to push a clamping block to clamp the stamping part, then the stamping part is carried to move, and the second gear is meshed with a rack plate in the moving process; the air cylinder is driven to rotate, comprehensive flushing can be achieved when the stamping part passes through the flushing assembly, dirt in the groove can be flushed and discharged in time, after flushing is finished, the stamping part reaches the air blowing assembly, water on the surface of the stamping part is scattered through blowing force generated by the air blowing assembly, and therefore the stamping part is quickly dried.

Description

Technical Field

[0001] This utility model relates to the field of stamping parts washing technology, and in particular to a stamping parts dirt washing device. Background Technology

[0002] A stamping parts cleaning device is a mechanical device specifically designed to clean oil, dust, debris, and other impurities from the surface of metal parts generated during the stamping process. This type of device uses physical and chemical cleaning methods to ensure that the cleanliness of the stamped parts meets the high standards required for subsequent processing or product assembly.

[0003] For example, CN213996910U discloses a cleaning device for processing automotive body stamping parts, belonging to the field of automotive stamping parts production technology. It includes two parallel mesh conveyor belts, a wiping mechanism, an automatic limiting mechanism, and a liquid collection funnel. The top of the liquid collection funnel has a liquid inlet. The wiping mechanism includes a support frame, a slide table, a lifting cylinder, a lifting plate, and a pushing cylinder. The top of the support frame has two slide rails, and the bottom of the lifting plate has a mounting frame. The bottom of the mounting frame has a wiping strip with an inverted "U" shape, and the inner wall of the wiping strip has a wiping brush. This utility model can clean both sides of the automotive body stamping parts. Under the action of the automatic limiting mechanism, the two sides of the automotive body stamping parts can be clamped to prevent the parts from shifting during rinsing and wiping. Furthermore, the wiping mechanism can wipe the top surface of the automotive body stamping parts back and forth.

[0004] In the aforementioned prior art, the worker transports the stamped part to a designated location via a conveying structure and fixes it with a clamping device. Then, the top and bottom of the stamped part are rinsed by a rinsing assembly. After rinsing, the wiping assembly is activated to move downwards and wipe the stamped part, thus completing the rinsing. However, the stamped part has grooves. Therefore, during rinsing, the stamped part is fixed, and the dirt in the grooves cannot be discharged from the grooves. Furthermore, after rinsing, the wiping assembly cannot wipe the rinsing liquid in the grooves, resulting in incomplete wiping. Utility Model Content

[0005] The purpose of this invention is to solve the problem that in the prior art, stamped parts have grooves, so during rinsing, the stamped parts are fixed and the dirt in the grooves cannot be discharged from the grooves. Furthermore, after rinsing, the wiping component cannot wipe the rinsing liquid in the grooves, resulting in incomplete wiping.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a stamping part dirt rinsing device, including a workbench, conveying components at both ends of the workbench, a circulating water tank in the middle of the workbench, sliding grooves on both sides of the middle of the workbench, a rack plate fixedly connected to the top of the workbench at the top of the sliding groove, a conveying rotation component at the sliding groove of the workbench, and a rinsing structure at the top of the workbench, the rinsing structure including a rinsing box body fixed to the top of the workbench, and rinsing components and air blowing components arranged on both sides inside the rinsing box body.

[0007] In a preferred embodiment, the conveying rotation assembly includes a chain disposed inside a slide groove. A first gear meshes with the middle of the chain, and a drive rod is fixedly connected to the middle of the first gear. The drive rod passes through the worktable and is rotatably connected to the worktable. One end of the drive rod is connected to a second motor. After the stamped part is conveyed to the designated position by the conveyor, the second motor is started to drive the first gear to rotate, causing the chain to move the connecting block. When the connecting block moves to the position of the stamped part, the cylinder is activated to push the clamping block to clamp the stamped part, and then the stamped part is moved.

[0008] In a preferred embodiment, the outer ring of the chain is provided with connecting blocks, which are slidably connected to the slide groove. A cylinder is rotatably connected to the side of the connecting blocks that are close to each other. A clamping block is fixedly connected to the side of the cylinders that are close to each other. A second gear is fixedly connected to the side of the cylinders that are far apart from each other. The second gear meshes with the rack plate. During the movement, the second gear meshes with the rack plate, causing the cylinder to rotate. When passing through the rinsing assembly, it can be thoroughly rinsed, and the dirt in the groove can be rinsed out in time. After rinsing, it reaches the blowing assembly. The blowing force generated by the blowing assembly disperses the moisture on the surface of the stamped part, thereby quickly drying the stamped part.

[0009] In a preferred embodiment, the rinsing assembly includes a first fixing rod, which is fixed to one side of the rinsing tank. A support plate is fixedly connected to the bottom end of the first fixing rod, and a water supply pipe is fixedly connected to one side of the support plate. The end of the water supply pipe near the support plate passes through the rinsing tank, and the end of the water supply pipe away from the support plate passes through the workbench and the circulating water tank. A water pump is provided in the middle of the water supply pipe. When the water pump is started, the rinsing liquid in the circulating water tank enters the water supply pipe.

[0010] In one preferred embodiment, the support plates are rotatably connected to each other at equal intervals on their adjacent sides. Spray nozzles are fixedly connected to the bottom of the support water pipes at equal intervals. A deflection rod is fixedly connected to the end of the support water pipe away from the water supply pipe. The deflection rod rotates through the support plate and is then specially delivered into the support water pipe, and finally sprayed out through the spray nozzle.

[0011] In a preferred embodiment, a first slider is slidably connected to the bottom end of the deflection rod. A connecting shaft is rotatably connected to the side of the first slider near the support plate. A reciprocating slider is fixedly connected to the end of the connecting shaft away from the first slider. A reciprocating screw is threadedly connected to the middle of the reciprocating slider. Several threaded grooves are provided on the reciprocating screw. A first motor is driven to one end of the reciprocating screw. The first motor is located on one side of the support plate. When the first motor is started, it drives the reciprocating screw to rotate. The reciprocating screw drives the reciprocating slider to move back and forth. The reciprocating slider drives the first slider to move through the connecting shaft. The first slider is pulled, causing the deflection rod to deflect. The first slider slides and deflects on the deflection rod. The deflection of the deflection rod causes the support water pipe to deflect. The support water pipe causes the spray head to deflect, thereby realizing swing washing, making the washing more thorough, and the dirt in the groove of the stamped part can be washed out in time.

[0012] In a preferred embodiment, the air blowing assembly includes an air pump, which is located on the top of the rinsing chamber away from the first fixed rod. An air pipe is fixedly connected to one side of the air pump, and the air pipe passes through the rinsing chamber and is fixedly connected to the rinsing chamber. When the stamping part moves to the jet head, the air pump is started, and negative pressure is generated inside the air pipe.

[0013] In a preferred embodiment, a connecting plate is fixedly connected to one end of the air pipe inside the rinsing chamber. Air jets are fixedly connected at equal intervals at the bottom end of the connecting plate. Second fixing rods are fixedly connected to both sides of the top end of the connecting plate, so that the air jets start to blow air at high pressure. The gas blows off the moisture on the stamped part. As the stamped part rotates, the moisture on the surface and in the groove is separated, thus avoiding the situation where the moisture in the groove cannot be wiped off.

[0014] In a preferred embodiment, the conveying assembly includes a support frame disposed at both ends of the worktable. A conveying component is disposed at the middle of the top of the support frame. A driving component is disposed at the end of the conveying component away from the worktable. Then, the stamping component continues to move and moves to the top of the conveying component at the other end. The cylinder retracts and the stamping component is placed on the conveying component, which conveys the stamping component.

[0015] In a preferred embodiment, a fixed box is fixedly connected to the top of one of the brackets on the side away from the workbench. The height of the fixed box is greater than that of the stamping part. Several absorbent cloth strips are arranged inside the fixed box. During the conveying process, the part will pass through the absorbent cloth strips, which will further absorb the water droplets remaining on the stamping part, thereby completing the final wiping.

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

[0017] 1. In this utility model, after the stamped part is transported to the designated position by the conveyor, the second motor is started to drive the first gear to rotate, so that the chain drives the connecting block to move. When the connecting block moves to the position of the stamped part, the cylinder is started to push the clamping block to clamp the stamped part, and then the stamped part is carried to move. During the movement, the second gear meshes with the rack plate, so that the cylinder rotates. When passing through the washing component, it can be thoroughly washed, and the dirt in the groove can be washed out in time. After washing, it reaches the air blowing component. The blowing force generated by the air blowing component disperses the water on the surface of the stamped part, thereby quickly drying the stamped part. Attached Figure Description

[0018] Figure 1 A schematic diagram of the structure of a stamping part dirt flushing device provided by this utility model;

[0019] Figure 2 A cross-sectional structural diagram of a waste flushing device for stamped parts provided by this utility model;

[0020] Figure 3 A schematic diagram of the conveying and rotating assembly structure of a stamped part waste flushing device provided by this utility model;

[0021] Figure 4 A schematic diagram of the connecting block structure of a stamped part waste flushing device provided by this utility model;

[0022] Figure 5 A schematic diagram of the flushing structure of a waste flushing device for stamped parts provided by this utility model;

[0023] Figure 6 A schematic diagram of the flushing assembly structure of a stamping part dirt flushing device provided by this utility model;

[0024] Figure 7 This utility model provides a device for flushing dirt from stamped parts. Figure 6 Enlarged structural diagram at point A in the diagram;

[0025] Figure 8 A schematic diagram of the conveying component structure of a stamped part waste flushing device provided by this utility model;

[0026] Legend:

[0027] 1. Workbench; 11. Circulating water tank; 12. Slide groove; 13. Rack plate; 21. Support; 22. Drive component; 23. Conveyor component; 24. Fixed box; 25. Absorbent strip; 31. Washing box; 32. First fixed rod; 321. Support plate; 322. Water pipe; 323. Water pump; 324. Support water pipe; 325. Spray head; 326. Deflection rod; 327. First slider; 328. First motor; 329. Reciprocating screw; 3210. Reciprocating slider; 3211. Connecting shaft; 33. Air pump; 331. Air pipe; 332. Second fixed rod; 333. Connecting plate; 334. Jet nozzle; 41. Chain; 42. First gear; 43. Drive rod; 44. Second motor; 45. Connecting block; 451. Cylinder; 452. Clamping block; 453. Second gear. Detailed Implementation

[0028] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0029] Please see Figure 1 - Figure 8 This utility model provides a technical solution: a stamping part dirt flushing device, including a workbench 1, conveying components at both ends of the workbench 1, a circulating water tank 11 in the middle of the workbench 1, and sliding grooves 12 on both sides of the middle of the workbench 1. A rack plate 13 is fixedly connected to the top of the workbench 1 in the sliding groove 12. A conveying rotation component is provided at the sliding groove 12 of the workbench 1. A flushing structure is provided at the top of the workbench 1. The flushing structure includes a flushing box 31, which is fixed to the top of the workbench 1. A flushing component and an air blowing component are provided on both sides inside the flushing box 31.

[0030] like Figure 1 - Figure 8As shown, the conveying rotating assembly includes a chain 41, which is disposed inside the slide 12. A first gear 42 is meshed in the middle of the chain 41, and a drive rod 43 is fixedly connected to the middle of the first gear 42. The drive rod 43 passes through the worktable 1 and is rotatably connected to the worktable 1. A second motor 44 is connected to one end of the drive rod 43. Connecting blocks 45 are arranged in a ring array on the outer side of the chain 41. The connecting blocks 45 are slidably connected to the slide 12. A cylinder 451 is rotatably connected to the side of the connecting blocks 45 that is close to each other. A clamping block 452 is fixedly connected to the side of the cylinders 451 that is close to each other. A second gear 453 is fixedly connected to the side of the cylinders 451 that is far away from each other. The second gear 453 meshes with the rack plate 13.

[0031] In one embodiment, after the stamped part is conveyed to the designated position by the conveyor 23, the second motor 44 is started to drive the first gear 42 to rotate, so that the chain 41 drives the connecting block 45 to move. When the connecting block 45 moves to the position of the stamped part, the cylinder 451 is started to push the clamping block 452 to clamp the stamped part, and then the stamped part is moved. During the movement, the second gear 453 meshes with the rack plate 13, so that the cylinder 451 rotates. When passing through the washing assembly, it can be thoroughly washed, and the dirt in the groove can be washed out in time. After the washing is completed, it reaches the blowing assembly. The blowing force generated by the blowing assembly disperses the water on the surface of the stamped part, thereby drying the stamped part quickly.

[0032] In another embodiment, an electric slider is provided inside the slide groove 12, and a cylinder 451 is mounted on the electric slider. When the cylinder 451 is activated, it pushes the clamping block 452 to clamp the stamped part. Subsequently, the electric slider drives the cylinder 451 to move, and the cylinder 451 carries the stamped part to move. During the movement, the second gear 453 meshes with the rack plate 13, causing the cylinder 451 to rotate. When passing through the rinsing assembly, it can be thoroughly rinsed, and the dirt in the groove can be rinsed and discharged in time. After rinsing, it reaches the air blowing assembly. The blowing force generated by the air blowing assembly disperses the moisture on the surface of the stamped part, thereby quickly drying the stamped part.

[0033] like Figure 1 - Figure 8As shown, the rinsing assembly includes a first fixing rod 32, which is fixed to one side inside the rinsing chamber 31. A support plate 321 is fixedly connected to the bottom end of the first fixing rod 32. A water supply pipe 322 is fixedly connected to one side of the support plate 321. The end of the water supply pipe 322 near the support plate 321 passes through the rinsing chamber 31, and the end of the water supply pipe 322 away from the support plate 321 passes through the workbench 1 and the circulating water tank 11. A water pump 323 is installed in the middle of the water supply pipe 322. Support water pipes 324 are rotatably connected at equal intervals on the sides of the support plates 321 that are close to each other. Spray nozzles 325 are fixedly connected at equal intervals at the bottom ends of the support water pipes 324. A deflecting rod 326 is fixedly connected to the end of the water support pipe 324 away from the water supply pipe 322. The deflecting rod 326 rotates through the support plate 321. A first slider 327 is slidably connected to the bottom end of the deflecting rod 326. A connecting shaft 3211 is rotatably connected to the side of the first slider 327 near the support plate 321. A reciprocating slider 3210 is fixedly connected to the end of the connecting shaft 3211 away from the first slider 327. A reciprocating screw 329 is threadedly connected to the middle of the reciprocating slider 3210. Several threaded grooves are provided on the reciprocating screw 329. A first motor 328 is drivenly connected to one end of the reciprocating screw 329. The first motor 328 is located on one side of the support plate 321.

[0034] In one embodiment, the water pump 323 is started, and the flushing liquid in the circulating water tank 11 enters the water supply pipe 322, and is then specially delivered to the support water pipe 324, and finally sprayed out through the spray head 325. At the same time, the first motor 328 is started, and the first motor 328 drives the reciprocating screw 329 to rotate. The reciprocating screw 329 drives the reciprocating slider 3210 to move back and forth. The reciprocating slider 3210 drives the first slider 327 to move through the connecting shaft 3211. The first slider 327 is pulled and causes the deflection rod 326 to deflect. The first slider 327 slides and deflects on the deflection rod 326. The deflection of the deflection rod 326 causes the support water pipe 324 to deflect. The support water pipe 324 causes the spray head 325 to deflect, thereby realizing swing flushing, making the flushing more thorough, and the dirt in the groove of the stamped part can be flushed out in time.

[0035] In another embodiment, a gear is provided at one end of the deflection rod 326. The rack is driven by the cylinder to mesh with the gear, so that the deflection rod 326 deflects and drives the support water pipe 324 to deflect. The support water pipe 324 drives the spray head 325 to deflect, thereby realizing swing rinsing, making the rinsing more thorough, and the dirt in the groove of the stamped part can be rinsed out in time.

[0036] like Figure 1 - Figure 8As shown, the air blowing assembly includes an air pump 33, which is located on the top of the rinsing box 31 away from the first fixed rod 32. An air pipe 331 is fixedly connected to one side of the air pump 33. The air pipe 331 passes through the rinsing box 31 and is fixedly connected to the rinsing box 31. A connecting plate 333 is fixedly connected to one end of the air pipe 331 inside the rinsing box 31. Air jets 334 are fixedly connected at equal intervals at the bottom of the connecting plate 333. A second fixed rod 332 is fixedly connected to both sides of the top of the connecting plate 333. The conveying assembly includes a bracket 21, which is located at both ends of the workbench 1. A conveying component 23 is located in the middle of the top of the bracket 21. A driving component 22 is located at the end of the conveying component 23 away from the workbench 1. A fixed box 24 is fixedly connected to the top of one bracket 21 away from the workbench 1. The height of the fixed box 24 is greater than that of the stamping component. Several absorbent cloth strips 25 are arranged inside the fixed box 24.

[0037] In this embodiment, the stamped part moves to the jet nozzle 334, the air pump 33 is activated, and a negative pressure is generated inside the air pipe 331, causing the jet nozzle 334 to start blowing air at high pressure. The gas blows off the moisture on the stamped part. As the stamped part rotates, the moisture on the surface and in the grooves is separated, thus avoiding the situation where the moisture in the grooves cannot be wiped off. Then the stamped part continues to move and moves to the top of the conveyor 23 at the other end. The cylinder 451 retracts, and the stamped part is placed on the conveyor 23. The conveyor 23 conveys the stamped part. During the conveying process, it will pass through the absorbent cloth strip 25. The absorbent cloth strip 25 further absorbs the water droplets remaining on the stamped part, thereby completing the final wiping.

[0038] Working principle: First, the worker transports the stamped part to the designated position via the bracket 21. The second motor 44 is started, driving the first gear 42 to rotate, causing the chain 41 to move the connecting block 45. When the connecting block 45 moves to the stamped part position, the cylinder 451 is activated, pushing the clamping block 452 to clamp the stamped part, and then carrying the stamped part to move. During the movement, the second gear 453 meshes with the rack plate 13, causing the cylinder 451 to rotate. At this time, the stamped part also begins to rotate. The water pump 323 is started, and the flushing liquid in the circulating water tank 11 enters the water supply pipe 322, and is then specially delivered to the support water pipe 324, finally sprayed out through the spray head 325. Simultaneously, the first motor 328 is started, driving the reciprocating screw 329 to rotate. The reciprocating screw 329 drives the reciprocating slider 3210 to move back and forth. The reciprocating slider 3210 drives the first slider 327 to move via the connecting shaft 3211. The first slider 327 is pulled, causing the deflection rod 326 to deflect. The first slider 327 slides and deflects on the deflecting rod 326. The deflection of the deflecting rod 326 drives the support water pipe 324 to deflect, and the support water pipe 324 drives the spray head 325 to deflect, thereby realizing swing rinsing, making the rinsing more thorough, and the dirt in the groove of the stamped part can be rinsed out in time. After rinsing, the stamped part moves to the spray head 334, the air pump 33 is started, the air pipe 331 generates negative pressure, and the spray head 334 starts high-pressure blowing. The gas blows off the water on the stamped part. As the stamped part rotates, the water on the surface and in the groove is separated, thus avoiding the situation where the water in the groove cannot be wiped off. Then the stamped part continues to move and moves to the top of the conveyor 23 at the other end. The cylinder 451 retracts, and the stamped part is placed on the conveyor 23. The conveyor 23 transports the stamped part. During the transport process, it will pass through the water-absorbing cloth strip 25. The water-absorbing cloth strip 25 further absorbs the water droplets remaining on the stamped part, thereby completing the final wiping.

[0039] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any other way. Any person skilled in the art may make changes or modifications to the above-disclosed technical content to create equivalent embodiments for application in other fields. However, any simple modifications, equivalent changes, and modifications made to the above embodiments based on the technical essence of the present utility model without departing from the technical solution of the present utility model shall still fall within the protection scope of the technical solution of the present utility model.

Claims

1. A device for flushing contaminants from stamped parts, comprising a workbench (1), characterized in that: The workbench (1) is provided with conveying components at both ends, and a circulating water tank (11) is provided in the middle of the workbench (1). Slide grooves (12) are provided on both sides of the middle of the workbench (1). A rack plate (13) is fixedly connected to the top of the slide groove (12) of the workbench (1). A conveying rotation component is provided at the slide groove (12) of the workbench (1). A rinsing structure is provided at the top of the workbench (1). The rinsing structure includes a rinsing box (31). The rinsing box (31) is fixed at the top of the workbench (1). A rinsing component and an air blowing component are provided on both sides inside the rinsing box (31). The conveying rotating assembly includes a chain (41) which is disposed inside the slide groove (12). A first gear (42) meshes with the middle of the chain (41). A drive rod (43) is fixedly connected to the middle of the first gear (42). The drive rod (43) passes through the worktable (1) and is rotatably connected to the worktable (1). One end of the drive rod (43) is connected to a second motor (44). The chain (41) is provided with connecting blocks (45) arranged in a ring array on the outer side. The connecting blocks (45) are slidably connected to the slide groove (12). A cylinder (451) is rotatably connected to the side of the connecting blocks (45) that is close to each other. A clamping block (452) is fixedly connected to the end of the cylinders (451) that is close to each other. A second gear (453) is fixedly connected to the side of the cylinders (451) that is far away from each other. The second gear (453) meshes with the rack plate (13).

2. The stamping part contaminant flushing device according to claim 1, characterized in that: The rinsing assembly includes a first fixing rod (32), which is fixed to one side inside the rinsing tank (31). A support plate (321) is fixedly connected to the bottom end of the first fixing rod (32). A water supply pipe (322) is fixedly connected to one side of the support plate (321). One end of the water supply pipe (322) near the support plate (321) passes through the rinsing tank (31), and the other end of the water supply pipe (322) away from the support plate (321) passes through the workbench (1) and the circulating water tank (11). A water pump (323) is provided in the middle of the water supply pipe (322).

3. The stamping part contaminant flushing device according to claim 2, characterized in that: Supporting water pipes (324) are rotatably connected to each other on one side of the support plates (321) that are close to each other. Spray nozzles (325) are fixedly connected to the bottom of the supporting water pipes (324) at equal intervals. A deflection rod (326) is fixedly connected to the end of the supporting water pipes (324) that is away from the water supply pipe (322). The deflection rod (326) rotates through the support plates (321).

4. The stamping part contaminant flushing device according to claim 3, characterized in that: The bottom end of the deflection rod (326) is slidably connected to a first slider (327). The side of the first slider (327) near the support plate (321) is rotatably connected to a connecting shaft (3211). The end of the connecting shaft (3211) away from the first slider (327) is fixedly connected to a reciprocating slider (3210). The middle part of the reciprocating slider (3210) is threadedly connected to a reciprocating screw (329). The reciprocating screw (329) has several threaded grooves. One end of the reciprocating screw (329) is drivenly connected to a first motor (328). The first motor (328) is located on one side of the support plate (321).

5. A waste flushing device for stamped parts according to claim 1, characterized in that: The air blowing assembly includes an air pump (33), which is located on the top of the flushing box (31) away from the first fixed rod (32). An air pipe (331) is fixedly connected to one side of the air pump (33), which passes through the flushing box (31) and is fixedly connected to the flushing box (31).

6. A stamping part contaminant flushing device according to claim 5, characterized in that: The air pipe (331) is fixedly connected to a connecting plate (333) at one end inside the flushing box (31). Air nozzles (334) are fixedly connected at equal intervals at the bottom end of the connecting plate (333). Second fixing rods (332) are fixedly connected to both sides of the top end of the connecting plate (333).

7. A waste flushing device for stamped parts according to claim 1, characterized in that: The conveying assembly includes a bracket (21) which is disposed at both ends of the workbench (1). A conveying component (23) is disposed at the middle of the top of the bracket (21), and a driving component (22) is disposed at the end of the conveying component (23) away from the workbench (1).

8. A waste flushing device for stamped parts according to claim 7, characterized in that: A fixed box (24) is fixedly connected to the top of one of the brackets (21) away from the workbench (1). The height of the fixed box (24) is greater than that of the stamping part. Several absorbent cloth strips (25) are arranged inside the fixed box (24).

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