Automobile interior sealing strip notch punching die

Abstract

The application discloses a cutting die for a gap of an automobile interior sealing strip and relates to the field of automobile part processing. The cutting die for the gap of the automobile interior sealing strip comprises an operation platform, the operation platform is integrally formed with a mounting plate, and further comprises a slotted elastic support ring which is slidably connected to the operation platform; an inflation air bag in a tubular shape is arranged in the elastic support ring, and the outer wall of the inflation air bag is fixedly connected with the inner wall of the elastic support ring; a cutting knife is connected to the mounting plate in a lifting mode, and the cutting knife is located directly above the elastic support ring; the elastic support ring is designed to be retractable, the elastic support ring is driven to move back and forth by an electric telescopic rod, and a gas curtain wall is used to reduce friction and prevent scratching; the inflation air bag is used to form stable support, offset the cutting tension, ensure the cutting precision, reset after cutting, and assist in fast taking out of the cutting piece by the gas curtain wall, so that the cycle is shortened, the loss is reduced, and the operation efficiency and the quality of the sealing strip are improved.

Description

Technical Field

[0001] This invention belongs to the field of automotive parts processing technology, specifically, it relates to a punching die for notches in automotive interior sealing strips. Background Technology

[0002] As a key component of the automotive interior system, automotive interior sealing strips mainly serve functions such as sealing, sound insulation, shock absorption, and decoration. Their quality directly affects the comfort, safety, and service life of the vehicle.

[0003] In the automobile production process, in order to meet the assembly requirements of the sealing strip and other body parts, it is usually necessary to punch notches at specific positions of the sealing strip. Therefore, the accuracy and efficiency of the sealing strip notch punching process have an important impact on the assembly quality and production progress of the automobile interior. To achieve this process, various automobile interior sealing strip notch punching dies have emerged. These dies complete the notch punching operation of the sealing strip through the cooperation of the punching cutter and the support structure.

[0004] However, in actual use, the existing automotive interior sealing strip notch punching dies require a support structure whose dimensions must be strictly matched with the inner cavity dimensions of the sealing strip to ensure stable support during punching. This leads to difficulties in fitting the sealing strip during the fitting stage due to the extremely small gap between the support structure and the inner cavity of the sealing strip. Operators often need to spend a lot of time adjusting the position of the sealing strip, which not only reduces work efficiency but may also cause scratches on the surface of the sealing strip due to forced fitting. After the notch punching is completed, the process of removing the sealing strip is also laborious due to the tight fit between the support structure and the inner cavity of the sealing strip, further restricting the improvement of production efficiency. In view of this, the present invention is proposed. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to overcome the shortcomings of the prior art and provide a notch punching die for automotive interior sealing strips that can overcome or at least partially solve the above problems.

[0006] To solve the above-mentioned technical problems, the basic concept of the technical solution adopted by the present invention is as follows:

[0007] A notch-cutting die for automotive interior sealing strips includes an operating platform with an integrally formed mounting plate. The die also includes: an elastic support ring with a groove slidably connected to the operating platform; a tubular expansion air bladder inside the elastic support ring, with the outer wall of the expansion air bladder fixedly connected to the inner wall of the elastic support ring; and a cutting blade vertically connected to the mounting plate, positioned directly above the elastic support ring. When the sealing strip to be cut is fitted onto the elastic support ring, the elastic support ring is in a contracted state, its size smaller than the cavity inside the sealing strip, and it makes small reciprocating movements within the cavity to facilitate the fitting operation. After fitting, the elastic support ring stops moving, the expansion air bladder expands, causing the elastic support ring to deform through the groove, thus supporting the sealing strip fitted onto it.

[0008] Preferably, the system further includes a sliding plate, which is slidably connected to the operating platform via a groove. A connecting shaft with a diameter smaller than the elastic support ring is fixedly connected to the sliding plate. The inflatable airbag is fixedly connected to one end of the connecting shaft. An electric telescopic rod is fixedly connected to the operating platform, and the sliding plate is fixedly connected to the telescopic end of the electric telescopic rod.

[0009] Furthermore, a hollow cavity is formed at the center of the connecting shaft, and air supply holes are formed on the connecting shaft that are respectively connected to the hollow cavity and the inflatable air bladder. A piston cylinder is fixedly installed on the operating platform, and a piston disc is slidably connected inside the piston cylinder. The piston disc is fixedly connected to the sliding plate through a connecting rod. Air supply pipe two and air supply pipe three are fixedly connected to the piston cylinder, and the end of air supply pipe three away from the piston cylinder is connected to the hollow cavity.

[0010] To facilitate the contraction and repositioning of the inflatable airbag, an exhaust pipe is fixedly connected to the inflatable airbag, and a solenoid valve is installed on the exhaust pipe.

[0011] To further enhance the air curtain effect between the elastic support ring and the internal cavity of the sealing strip during the sealing strip fitting process, an air jet chamber is provided between the inner and outer walls of the elastic support ring. Multiple sets of nozzles communicating with the air jet chamber are equidistantly provided on the outer wall of the elastic support ring. Each set of nozzles has multiple nozzles, which are circumferentially distributed on the outer wall of the elastic support ring. The end of the exhaust pipe away from the expansion airbag extends into the air jet chamber, and the gas ejected from the nozzles forms an air curtain between the elastic support ring and the internal cavity of the sealing strip.

[0012] To facilitate the use of a traction ring to move the sealing strip onto the elastic support ring via negative pressure adsorption, preferably, a slider is also included. The slider is slidably connected to the mounting plate via a guide groove. A traction ring is fixedly connected to the slider, and the traction ring is coaxially arranged with the elastic support ring. The traction ring moves the sealing strip onto the elastic support ring via negative pressure adsorption. A hydraulic telescopic rod is fixedly installed on the mounting plate, and the slider is fixedly connected to the telescopic end of the hydraulic telescopic rod.

[0013] To enable the negative pressure adsorption holes to generate suction through the adsorption chamber, an adsorption chamber is further provided between the inner and outer walls of the traction ring. Multiple sets of negative pressure adsorption holes communicating with the adsorption chamber are equidistantly provided on the inner wall of the traction ring. Each set of negative pressure adsorption holes is provided with multiple holes, and the multiple negative pressure adsorption holes are equidistantly distributed on the inner wall of the traction ring. A vacuum pump is fixedly installed on the mounting plate, and the input end of the vacuum pump is connected to the adsorption chamber through a pipe.

[0014] In order to deliver gas into the jet chamber during the process of attaching the sealing strip to the elastic support ring, a three-way pipe is installed at one end of the connecting shaft. The output end of the three-way pipe is connected to the hollow cavity, and its two input ends are connected to different pipelines. One is connected to the end of the gas supply pipe three away from the piston cylinder, and the other is fixedly connected to the gas supply pipe one of the external gas source.

[0015] For controlling the raising and lowering of the punching blade, preferably, a cylinder is fixedly mounted on the mounting plate, and the punching blade is detachably connected to the telescopic end of the cylinder.

[0016] To facilitate the replacement of punching blades of different sizes or shapes as needed, the cylinder's telescopic end is further fixedly connected to a pin, the punching blade is fixedly connected to a connecting sleeve, the pin is inserted into the connecting sleeve, and the connecting sleeve is threaded with a fixing bolt, the end of which is inserted into a locking hole on the outer wall of the pin.

[0017] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0018] The invention features a small-sized design for the elastic support ring in its retracted state, which reduces the initial difficulty of fitting the sealing strip. The electric telescopic rod drives its reciprocating movement, which reduces fitting jamming and improves the efficiency of the fitting operation, allowing operators to complete the fitting action more easily.

[0019] The gas generated by the sliding plate driving the piston disc forms an air curtain through the nozzle, which can reduce friction, avoid scratching the sealing strip, make the connection easier, ensure the appearance quality of the sealing strip, and make the connection operation easier, further improving work efficiency.

[0020] After the solenoid valve is closed, the expanding air bladder causes the elastic support ring to deform into a stable support, which can counteract the pulling force of the punching blade, prevent the sealing strip from being stretched, and ensure that the cut is flat and the notch position is accurate during punching.

[0021] After punching, the expansion airbag contracts and the elastic support ring resets. Combined with the air curtain wall, this facilitates quick part removal, reduces the production cycle, and also avoids scratches during part removal and reduces mold wear. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0023] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0024] Figure 3 This is a cross-sectional view of the operating table of the present invention;

[0025] Figure 4 This is a cross-sectional view of the piston cylinder, connecting shaft, and elastic support ring of the present invention;

[0026] Figure 5 This is a cross-sectional view of the connecting shaft, inflatable airbag, and elastic support ring of the present invention;

[0027] Figure 6 This is a schematic diagram showing the unfolded structure of the connecting shaft, the inflatable airbag, and the elastic support ring of the present invention.

[0028] Figure 7 This is a schematic diagram showing the unfolded structure of the punching blade, pin, and connecting sleeve of the present invention;

[0029] Figure 8 This is a schematic diagram of the structure of the traction ring and slider of the present invention;

[0030] Figure 9 This is a cross-sectional view of the traction ring and slider of the present invention.

[0031] In the diagram: 1. Operating platform; 101. Mounting plate; 2. Sliding plate; 201. Connecting shaft; 202. Inflatable airbag; 203. Elastic support ring; 204. Groove; 205. Electric telescopic rod; 3. Hollow cavity; 301. Air inlet; 302. Exhaust pipe; 303. Nozzle; 304. Air inlet pipe one; 4. Piston cylinder; 401. Piston disc; 402. Connecting rod; 403. Air inlet pipe two; 404. Air inlet pipe three; 405. T-connector; 5. Cylinder; 501. Punching blade; 502. Pin; 503. Connecting sleeve; 504. Fixing bolt; 6. Traction ring; 601. Negative pressure adsorption hole; 602. Adsorption chamber; 603. Pipe; 604. Vacuum pump; 7. Hydraulic telescopic rod; 701. Slider. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments will be clearly and completely described below with reference to the accompanying drawings. The following embodiments are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0033] Example 1: Refer to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 A notch-cutting die for automotive interior sealing strips includes an operating platform 1, on which an integrally formed mounting plate 101 is mounted. The die also includes an elastic support ring 203 with a groove 204 slidably connected to the operating platform 1; the elastic support ring 203 has a tubular inflatable air bladder 202 inside, and the outer wall of the inflatable air bladder 202 is fixedly connected to the inner wall of the elastic support ring 203; a cutting blade 501 is vertically connected to the mounting plate 101, positioned directly above the elastic support ring 203. When the sealing strip to be cut is fitted onto the elastic support ring 203, the elastic support ring 203 is in a contracted state, its size being smaller than the cavity inside the sealing strip. Simultaneously, it makes small reciprocating movements within the cavity of the sealing strip to facilitate the fitting operation. After fitting, the elastic support ring 203 stops moving, and the inflatable air bladder 202 begins to inflate, causing the elastic support ring 203 to deform through the groove 204, thus supporting the sealing strip fitted onto it.

[0034] It also includes a sliding plate 2, which is slidably connected to the operating platform 1 via a sliding groove. A connecting shaft 201 with a diameter smaller than that of the elastic support ring 203 is fixedly connected to the sliding plate 2. An inflatable airbag 202 is fixedly connected to one end of the connecting shaft 201. An electric telescopic rod 205 is fixedly connected to the operating platform 1. The sliding plate 2 is fixedly connected to the telescopic end of the electric telescopic rod 205.

[0035] A hollow cavity 3 is provided at the center of the connecting shaft 201. An air supply hole 301 is provided on the connecting shaft 201, which is connected to the hollow cavity 3 and the inflatable air bag 202 respectively. A piston cylinder 4 is fixedly installed on the operating platform 1. A piston disc 401 is slidably connected inside the piston cylinder 4. The piston disc 401 is fixedly connected to the sliding plate 2 through the connecting rod 402. An air supply pipe 2 403 and an air supply pipe 3 404 are fixedly connected on the piston cylinder 4. The end of the air supply pipe 3 404 away from the piston cylinder 4 is connected to the hollow cavity 3.

[0036] An exhaust pipe 302 is fixedly connected to the inflatable airbag 202, and a solenoid valve is installed on the exhaust pipe 302.

[0037] An air jet chamber is provided between the inner and outer walls of the elastic support ring 203. Multiple sets of nozzles 303 connected to the air jet chamber are equidistantly provided on the outer wall of the elastic support ring 203. Each set of nozzles 303 has multiple nozzles, which are equidistantly distributed on the outer wall of the elastic support ring 203. The end of the exhaust pipe 302 away from the inflatable airbag 202 extends into the air jet chamber. The gas ejected from the nozzles 303 forms an air curtain between the elastic support ring 203 and the internal cavity of the sealing strip.

[0038] A cylinder 5 is fixedly mounted on the mounting plate 101, and the punching blade 501 is detachably connected to the telescopic end of the cylinder 5.

[0039] Specifically, when punching notches in the automotive interior sealing strip, the sealing strip to be punched is first fitted onto the elastic support ring 203. At this time, the elastic support ring 203 is in a contracted state, and its size is smaller than the cavity inside the sealing strip, providing sufficient space for the sealing strip. This makes it easier for the sealing strip to fit onto the elastic support ring 203, reducing the difficulty of the initial fitting.

[0040] At the same time, the electric telescopic rod 205 is activated. The telescopic end of the electric telescopic rod 205 performs reciprocating telescopic motion, pushing the sliding plate 2 to slide smoothly back and forth on the operating platform 1 through the slide groove. Since the sliding plate 2 is connected to the elastic support ring 203 through the connecting shaft 201, the movement of the sliding plate 2 causes the elastic support ring 203 to move back and forth in a small amplitude within the cavity of the sealing strip. This active reciprocating adjustment can effectively deal with the minor irregularities that may exist in the inner cavity of the sealing strip, reduce jamming and obstruction during the fitting process, improve the efficiency of the fitting operation, and make it easier for the operator to complete the fitting action.

[0041] Meanwhile, during the reciprocating sliding process, the sliding plate 2 drives the piston disc 401 to reciprocate synchronously within the piston cylinder 4 via the connecting rod 402. When the piston disc 401 slides to the left, a negative pressure is formed inside the piston cylinder 4, drawing in external gas through the second gas supply pipe 403 for storage. When the piston disc 401 slides to the right, the gas inside the piston cylinder 4 is compressed and sequentially transported into the expansion bladder 202 through the third gas supply pipe 404, the hollow cavity 3 of the connecting shaft 201, and the gas supply hole 301. At this time, the solenoid valve on the exhaust pipe 302 is opened, allowing the gas supplied into the expansion bladder 202 to flow freely. The gas enters the jet chamber of the elastic support ring 203 through the exhaust pipe 302 and is then ejected through the nozzle 303. Since the nozzles 303 are equidistantly distributed on the outer wall of the elastic support ring 203, the ejected gas forms a uniform air curtain between the elastic support ring 203 and the inner cavity of the sealing strip. The air curtain transforms the direct contact between the sealing strip and the elastic support ring 203 into gas lubrication, effectively reducing the frictional resistance between the two. This not only prevents the surface of the sealing strip from being scratched or worn during the fitting process, ensuring the appearance quality of the sealing strip, but also makes the fitting operation more labor-saving and further improves work efficiency.

[0042] When the notch to be punched on the sealing strip moves to the elastic support ring 203 and is directly below the punching blade 501, stop attaching the sealing strip to the elastic support ring 203 and close the solenoid valve on the exhaust pipe 302. At this time, the piston disc 401 continues to slide to the right, and the gas delivered into the expansion bladder 202 cannot be discharged, causing the expansion bladder 202 to begin to expand. Since the outer wall of the expansion bladder 202 is fixedly connected to the inner wall of the elastic support ring 203, the expanding bladder will cause the elastic support ring 203 to undergo radial deformation through the slot 204, so that its outer wall tightly fits the inner wall of the sealing strip, providing a stable support for the sealing strip fitted on it. This all-round support formed by the fit, especially near the area where the punching blade 501 acts, can generate sufficient reaction force to counteract the pulling force on the sealing strip when the punching blade 501 moves down.

[0043] Afterwards, the electric telescopic rod 205 is turned off, and the cylinder 5 is activated. The telescopic end of the cylinder 5 pushes the punching blade 501 on the mounting plate 101 to descend, punching a notch in the sealing strip. When the punching blade 501 contacts the upper surface of the sealing strip and continues to move downward, due to the stable support of the elastic support ring 203 on the inner wall of the sealing strip, the sealing strip will not be stretched or deformed as the punching blade 501 moves downward. This avoids the situation where the two sides of the cut on the upper surface of the sealing strip are pulled: on the one hand, it ensures that the material at the cut will not undergo irregular deformation due to stretching, ensuring the flatness of the cut, improving the appearance quality of the sealing strip and the fit with other components in subsequent assembly; on the other hand, it prevents the sealing strip from shifting due to stretching, so that the position of the punching notch can be formed strictly according to the preset requirements, ensuring the accuracy of the notch distance and meeting the strict requirements of automotive interior sealing strips for dimensional accuracy.

[0044] After punching is completed, the solenoid valve on the exhaust pipe 302 is opened, and the gas in the expansion airbag 202 quickly enters the jet chamber of the elastic support ring 203 through the exhaust pipe 302, and then is ejected through the nozzle 303. During this process, the expansion airbag 202 contracts rapidly due to the gas discharge, and the elastic support ring 203 also returns to its original shape. This not only facilitates the quick removal of the punched sealing strip, reducing the production cycle and improving production efficiency, but also, at the same time, the air curtain formed by the gas ejected through the nozzle 303 further reduces the friction between the sealing strip and the elastic support ring 203, making the removal process smoother, avoiding scratches on the surface of the sealing strip during removal, and reducing wear on mold components caused by excessive friction, thus extending the service life of the mold.

[0045] It should be noted that both gas supply pipe 2 403 and gas supply pipe 3 404 are equipped with one-way valves, and gas supply pipe 3 404 uses a stretchable and retractable hose. Therefore, gas supply pipe 3 404 will not interfere with the movement of sliding plate 2.

[0046] Example 2: Refer to Figure 1 , Figure 2 , Figure 3 , Figure 8 , Figure 9 A notch-cutting die for automotive interior sealing strips is basically the same as in Embodiment 1, but further includes a slider 701. The slider 701 is slidably connected to the mounting plate 101 via a guide groove. A traction ring 6 is fixedly connected to the slider 701. The traction ring 6 is coaxially arranged with the elastic support ring 203. The traction ring 6 moves the sealing strip onto the elastic support ring 203 through negative pressure adsorption. A hydraulic telescopic rod 7 is fixedly installed on the mounting plate 101, and the slider 701 is fixedly connected to the telescopic end of the hydraulic telescopic rod 7.

[0047] An adsorption cavity 602 is provided between the inner and outer walls of the traction ring 6. Multiple sets of negative pressure adsorption holes 601 communicating with the adsorption cavity 602 are provided at equal intervals on the inner wall of the traction ring 6. Each set of negative pressure adsorption holes 601 is provided with multiple holes. The multiple negative pressure adsorption holes 601 are distributed circumferentially at equal intervals on the inner wall of the traction ring 6. A vacuum pump 604 is fixedly installed on the mounting plate 101. The input end of the vacuum pump 604 is connected to the adsorption cavity 602 through a pipe 603.

[0048] First, the operator aligns one end of the sealing strip to be punched with the inlet of the traction ring 6 and gently pushes it into the traction ring 6, so that the outer wall of the sealing strip makes initial contact with the inner wall of the traction ring 6. At this time, the vacuum pump 604 is started. The vacuum pump 604 pumps air into the adsorption chamber 602 between the inner and outer walls of the traction ring 6 through the pipe 603. Since multiple sets of negative pressure adsorption holes 601 connected to the adsorption chamber 602 are equidistantly opened on the inner wall of the traction ring 6, and the multiple holes of each set of negative pressure adsorption holes 601 are equidistantly distributed in a circle, when a negative pressure is formed in the adsorption chamber 602, the outer wall of the sealing strip will be firmly fixed to the inner wall of the traction ring 6 by a uniform adsorption force. This multi-set circumferentially distributed negative pressure adsorption method can ensure that the adsorption force on the sealing strip is balanced, avoid the deformation of the sealing strip caused by excessive local force, and also prevent the sealing strip from falling off or shifting position during subsequent movement.

[0049] Next, the hydraulic telescopic rod 7 is activated. The telescopic end of the hydraulic telescopic rod 7 begins to extend, driving the slider 701, which is fixedly connected to it, to slide smoothly along the guide groove on the mounting plate 101. Because the traction ring 6 is fixedly connected to the slider 701 and is coaxially set with the elastic support ring 203, the sliding of the slider 701 will synchronously drive the traction ring 6 and the sealing strip that is adsorbed and fixed to move axially towards the elastic support ring 203. At the same time, the driving force provided by the hydraulic telescopic rod 7 is stable and controllable, which can accurately control the moving speed and distance of the traction ring 6, ensuring that the sealing strip can be smoothly and accurately fitted onto the elastic support ring 203. This automated movement method, compared with manual fitting, not only reduces the labor intensity of the operator, but also avoids the deviation that may occur in manual operation, and improves the accuracy and efficiency of fitting.

[0050] As the sealing strip is gradually fitted onto the elastic support ring 203, due to the coaxial arrangement of the traction ring 6 and the elastic support ring 203, and the precise drive control of the hydraulic telescopic rod 7, the sealing strip can always move along the correct axial direction without any skew or deviation, ensuring the smoothness of the fitting process. When the position on the sealing strip that needs to be punched moves onto the elastic support ring 203 and is directly below the punching blade 501, the hydraulic telescopic rod 7 stops extending, and the slider 701 and the traction ring 6 also stop moving. Subsequently, the vacuum pump 604 is turned off, the negative pressure in the adsorption chamber 602 disappears, and the adsorption force of the negative pressure adsorption hole 601 on the sealing strip is also released. The sealing strip and the traction ring 6 separate smoothly. Then, the telescopic end of the hydraulic telescopic rod 7 retracts, causing the slider 701 and the traction ring 6 to slide in the opposite direction along the guide groove and return to the initial position, preparing for the next fitting operation.

[0051] The above-mentioned socketing method, in conjunction with the reciprocating movement of the elastic support ring 203 and the air curtain structure, further improves the socketing efficiency. The negative pressure adsorption ensures the stability of the sealing strip during transfer, and the hydraulic drive ensures the accuracy and stability of the transfer. The whole process realizes the automation of sealing strip socketing, which not only improves work efficiency but also reduces the damage to the sealing strip caused by improper manual operation, thus ensuring the quality of the sealing strip.

[0052] It should be noted that pipe 603 is a stretchable and retractable hose, therefore, pipe 603 will not interfere with the movement of slider 701 and traction ring 6.

[0053] Example 3: Reference Figure 1 , Figure 3 , Figure 4 A notch punching die for automotive interior sealing strips is basically the same as in Embodiment 1. However, a further improvement is that a three-way pipe 405 is installed at one end of the connecting shaft 201. The output end of the three-way pipe 405 is connected to the hollow cavity 3, and its two input ends are connected to different pipelines. One is connected to the end of the gas supply pipe 304 away from the piston cylinder 4, and the other is fixedly connected to the gas supply pipe 304 of the external gas source. The gas supply pipe 304 is equipped with a flow control valve and a pressure sensor. The flow control valve is used to adjust the gas flow rate input from the external gas source, and the pressure sensor is used to monitor the gas pressure in the gas supply pipe 304 to ensure the stability of the input gas. The external gas source is an air pump or air tank that can provide continuous and stable gas pressure, and its output gas pressure can be adjusted according to actual needs.

[0054] When the automotive interior sealing strip notch punching die is used for the fitting operation, when the sliding plate 2 slides back and forth under the drive of the electric telescopic rod 205, the piston disc 401 is driven to slide back and forth in the piston cylinder 4 through the connecting rod 402. When the piston disc 401 slides to the right, the gas in the piston cylinder 4 enters the expansion airbag 202 through the gas supply pipe 3 404, the three-way pipe 405, the hollow cavity 3 and the gas supply hole 301. At this time, the solenoid valve on the exhaust pipe 302 is opened, and the gas enters the jet chamber of the elastic support ring 203 and is ejected through the nozzle 303 to form an air curtain wall.

[0055] If the piston cylinder 4 has insufficient capacity or the piston disc 401 has insufficient sliding efficiency, resulting in insufficient gas supply to the jet chamber and the airflow ejected from the nozzle 303 is unable to form a stable air curtain, the pressure sensor on the gas supply pipe 304 will detect that the gas pressure is lower than the preset value. At this time, the flow control valve on the gas supply pipe 304 can be opened to allow the gas from the external gas source to enter the hollow cavity 3 through the gas supply pipe 304 and the three-way pipe 405. After merging with the gas supplied by the piston cylinder 4, the gas enters the expansion bladder 202 together and then enters the jet chamber through the exhaust pipe 302. By adjusting the flow control valve, the gas input from the external gas source can be controlled to ensure that there is enough gas in the jet chamber to be ejected through the nozzle 303 to form a stable air curtain.

[0056] During this process, the introduction of an external air source effectively compensates for the insufficient air supply of piston cylinder 4, ensuring the stability of the air curtain. A stable air curtain can continuously reduce the friction between the elastic support ring 203 and the sealing strip, preventing the sealing strip surface from being scratched or worn during the fitting process, thus ensuring the appearance quality of the sealing strip. At the same time, sufficient gas flow ensures stable lubrication of the air curtain, reducing obstacles during the fitting process, making it easier for operators, and further improving fitting efficiency. In addition, the cooperation of the flow control valve and pressure sensor on the gas supply pipe 304 can accurately adjust the input of the external air source according to the actual gas supply situation, avoiding gas waste and ensuring stable gas supply pressure, making the formation of the air curtain more stable.

[0057] It should be noted that the air supply pipe 304 is a flexible hose, so it will not interfere with the movement of the sliding plate 2. In addition, the air supply pipe 304 is equipped with a one-way valve to ensure that the external air source is stably delivered to the jet chamber.

[0058] Example 4: Reference Figure 7 A notch punching die for automotive interior sealing strips is basically the same as in Embodiment 1. Furthermore, a pin 502 is fixedly connected to the telescopic end of the cylinder 5, a connecting sleeve 503 is fixedly connected to the punching cutter 501, the pin 502 is inserted into the connecting sleeve 503, and a fixing bolt 504 is threaded onto the connecting sleeve 503. The end of the fixing bolt 504 is inserted into the locking hole on the outer wall of the pin 502.

[0059] When installing the punch cutter 501, first align the connecting sleeve 503 at the upper end of the punch cutter 501 with the pin 502 at the telescopic end of the cylinder 5. Then, smoothly insert the pin 502 into the connecting sleeve 503 until the end of the pin 502 contacts the bottom of the connecting sleeve 503, ensuring that the two are connected in place. Next, screw the fixing bolt 504 into the threaded hole of the connecting sleeve 503. As the fixing bolt 504 is tightened, its end gradually goes deeper and finally inserts into the locking hole of the pin 502, firmly fixing the punch cutter 501 to the telescopic end of the cylinder 5. This connection method is simple and convenient to operate, requiring no complicated tools or skills. Ordinary operators can quickly complete the installation, greatly shortening the installation time of the punch cutter 501 and improving work efficiency.

[0060] When it is necessary to replace the punching cutter 501 with a different specification to adapt to different notch punching requirements, first use a tool to loosen the fixing bolt 504 on the connecting sleeve 503, so that the end of the fixing bolt 504 comes out from the locking hole of the pin 502, releasing the lock on the pin 502 and the connecting sleeve 503. Then, pull the punching cutter 501 together with the connecting sleeve 503 out of the pin 502. Then install and fix the new punching cutter 501 according to the above installation steps. Since the disassembly process of the fixing bolt 504 is simple and quick, the replacement of the punching cutter 501 is more convenient and efficient, and it can quickly adapt to different punching requirements, reducing downtime caused by replacing the punching cutter 501, and improving the production efficiency and versatility of the mold.

[0061] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention in any way. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention.

Claims

1. A notch-cutting die for automotive interior sealing strips, comprising an operating platform (1), wherein an mounting plate (101) is integrally formed on the operating platform (1), characterized in that, Also includes: The operating platform (1) is slidably connected to an elastic support ring (203) with a groove (204); The elastic support ring (203) has a tubular inflatable air bladder (202) inside, and the outer wall of the inflatable air bladder (202) is fixedly connected to the inner wall of the elastic support ring (203). A punching blade (501) is vertically connected to the mounting plate (101), and the punching blade (501) is located directly above the elastic support ring (203). When the sealing strip to be punched is fitted onto the elastic support ring (203), the elastic support ring (203) is in a contracted state, its size is smaller than the cavity inside the sealing strip, and it will move back and forth slightly within the cavity of the sealing strip to facilitate the fitting operation. After the fitting is completed, the elastic support ring (203) stops moving, and the expansion airbag (202) begins to expand, causing the elastic support ring (203) to deform through the slot (204) to support the sealing strip fitted onto it. It also includes a sliding plate (2), which is slidably connected to the operating platform (1) through a sliding groove. A connecting shaft (201) is fixedly connected to the sliding plate (2), the diameter of which is smaller than that of the elastic support ring (203). The inflatable airbag (202) is fixedly connected to one end of the connecting shaft (201). An electric telescopic rod (205) is fixedly connected to the operating platform (1). The sliding plate (2) is fixedly connected to the telescopic end of the electric telescopic rod (205). A hollow cavity (3) is opened in the center of the connecting shaft (201). An air supply hole (301) is opened on the connecting shaft (201) and communicates with the hollow cavity (3) and the inflatable airbag (202) respectively. A piston cylinder (4) is fixedly installed on the operating platform (1). A piston disc (401) is slidably connected inside the piston cylinder (4). The piston disc (401) is fixedly connected to the sliding plate (2) through the connecting rod (402). The piston cylinder (4) is fixedly connected to the sliding plate (2). The system has two gas supply pipes, a second (403) and a third (404). The end of the third (404) away from the piston cylinder (4) is connected to the hollow cavity (3). An exhaust pipe (302) is fixedly connected to the expansion bladder (202). A solenoid valve is installed on the exhaust pipe (302). An air jet chamber is formed between the inner and outer walls of the elastic support ring (203). Multiple sets of nozzles (303) connected to the air jet chamber are equidistantly arranged on the outer wall of the elastic support ring (203). Each set of nozzles (303) has multiple nozzles. The multiple nozzles (303) are circumferentially distributed on the outer wall of the elastic support ring (203). The end of the exhaust pipe (302) away from the expansion bladder (202) extends to the air jet chamber. In the cavity, the gas ejected by the nozzle (303) forms an air curtain between the elastic support ring (203) and the inner cavity of the sealing strip. It also includes a slider (701), which is slidably connected to the mounting plate (101) through a guide groove. A traction ring (6) is fixedly connected to the slider (701). The traction ring (6) is coaxially arranged with the elastic support ring (203). The traction ring (6) moves the sealing strip to the elastic support ring (203) through negative pressure adsorption. A hydraulic telescopic rod (7) is fixedly installed on the mounting plate (101). The slider (701) is fixedly connected to the telescopic end of the hydraulic telescopic rod (7). An adsorption cavity (602) is opened between the inner and outer walls of the traction ring (6).The traction ring (6) has multiple sets of negative pressure adsorption holes (601) equidistantly arranged on its inner wall, communicating with the adsorption chamber (602). Each set of negative pressure adsorption holes (601) has multiple holes, which are circumferentially distributed on the inner wall of the traction ring (6). A vacuum pump (604) is fixedly installed on the mounting plate (101), and the input end of the vacuum pump (604) is connected to the adsorption chamber (602) through a pipe (603).

2. The notch-cutting die for automotive interior sealing strips according to claim 1, characterized in that, One end of the connecting shaft (201) is equipped with a three-way pipe (405). The output end of the three-way pipe (405) is connected to the hollow cavity (3), and its two input ends are connected to different pipelines. One is connected to the end of the gas supply pipe three (404) away from the piston cylinder (4), and the other is fixedly connected to the gas supply pipe one (304) of the external gas source.

3. The notch-cutting die for automotive interior sealing strips according to claim 1, characterized in that, A cylinder (5) is fixedly installed on the mounting plate (101), and the punching blade (501) is detachably connected to the telescopic end of the cylinder (5).

4. The notch-cutting die for automotive interior sealing strips according to claim 3, characterized in that, The cylinder (5) has a pin (502) fixedly connected to its telescopic end. A connecting sleeve (503) is fixedly connected to the punch (501). The pin (502) is inserted into the connecting sleeve (503). A fixing bolt (504) is threaded onto the connecting sleeve (503). The end of the fixing bolt (504) is inserted into the locking hole on the outer wall of the pin (502).

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