A high-precision punching device for automobile decorative film

Abstract

The present invention discloses a high-precision punching device for automotive decorative films, which relates to the field of punching technology and aims to solve the technical problem that coiled materials are easily bent and warped after being unfolded due to the influence of long-term roll storage, which seriously affects the punching precision and quality of the finished product. The device comprises a base, a punching assembly, a punching table assembly and an airflow assembly arranged on the top of the base, the punching assembly comprising a die, a cutter mounted on the bottom of the die, a first airflow channel and a second airflow channel arranged in the inner cavity of the die, the punching table assembly comprising a forming table, a plurality of circular grooves formed on the top of the forming table, a piston movably arranged in the circular groove, the airflow assembly comprising an airflow control box, an adjusting rotor arranged in the inner cavity of the airflow control box, an airflow conveying groove and a narrow groove formed on the side wall of the adjusting rotor, and the airflow conveying groove and the narrow groove being connected. The present invention has the advantages of flexibly smoothing the forming area of ​​the coiled material and eliminating the bending and warping caused by long-term roll storage.

Description

Technical Field

[0001] The present invention relates to the field of punching technology, and more particularly to a high-precision punching device for automobile decorative films. Background Art

[0002] Car decorative film is a film used on car body or window glass to achieve multiple functions such as decoration and protection. Figure 1 The car window structure shown has a complex edge shape. The original decorative film is mostly a roll of standard size, which must be punched to accurately fit the window contour to avoid problems such as edge warping, bubbles or incomplete coverage. The decorative film that has been punched in advance can be directly positioned and pasted, reducing on-site cutting errors and avoiding edge burrs, film wrinkles and other problems caused by inaccurate manual cutting, ensuring a smooth and beautiful final effect.

[0003] When punching window film from a roll of material, it's typically unrolled by a conveyor and fed into a punching machine, where the cutter cuts the unrolled material into shape. However, due to long-term storage, the unrolled material suffers from poor flatness and is prone to bending and warping, which severely impacts punching accuracy and the quality of the finished product. To address this issue, we propose a high-precision punching device for automotive decorative film. Summary of the Invention

[0004] The purpose of the present invention is to provide a high-precision punching device for automotive decorative films to solve the technical problem that the coiled material is easily bent and warped after being unfolded due to long-term roll storage, which seriously affects the punching accuracy and quality of the finished product.

[0005] In order to solve the above technical problems, the present invention provides the following technical solutions: a high-precision punching device for automobile decorative film, comprising a base, a punching assembly, a punching platform assembly and an airflow assembly arranged on the top of the base; the punching assembly comprises a die, a cutter is installed at the bottom of the die, a first airflow channel and a second airflow channel are arranged in the inner cavity of the die, the output end of the first airflow channel is connected to a plurality of first oblique channels, and the output end of the second airflow channel is connected to a plurality of second oblique channels; the punching platform assembly comprises a molding platform, the top of the molding platform is in the shape of a car window, a plurality of circular grooves are opened on the top of the molding platform, and a piston is movably arranged in the circular groove; the airflow assembly comprises an airflow control box, The inner cavity of the air flow control box is arranged with an adjusting rotor, and the side wall of the adjusting rotor is provided with an air flow conveying groove and a narrow groove, the air flow conveying groove and the narrow groove are connected, and the inner wall of the air flow conveying groove is provided with an air supply channel, and the air supply channel is used to continuously convey air flow into the air flow conveying groove; the adjusting rotor can adjust the air flow to blow pressure toward the top of the forming area of ​​the coil to form a flexible smoothing. During this period, the adjusting rotor can adjust the multiple pistons to move down, so that the inner cavities of the multiple circular grooves form a negative pressure, and form adsorption and fixation on the bottom of the forming area of ​​the coil. After the adsorption and fixation are completed, the adjusting rotor can adjust the air flow to blow pressure on the top of the non-forming area of ​​the coil to form a flexible downward pressure on the non-forming area.

[0006] Preferably, the punching assembly includes a support frame, a hydraulic cylinder is arranged on the support frame, the output end of the hydraulic cylinder is connected to the top of the die, and the cutter is a long curved structure for punching and forming the shape of the window film on the coil.

[0007] Preferably, a hemispherical protrusion block is connected to the bottom of the die, and multiple output ends of the first oblique channels are arranged in a ring array on the side wall of the hemispherical protrusion block, and the output ends of the first oblique channels are inclined away from the axial position of the hemispherical protrusion block; the second air flow channel is arranged in a semi-enclosed shape on the side of the cutter, and multiple output ends of the second oblique channels are respectively inclined away from the side wall of the cutter.

[0008] Preferably, the punching table assembly also includes a fixed table, a window-shaped groove is provided on the top of the fixed table, the molding table is arranged in the window-shaped groove, a groove is formed between the molding table and the inner side wall of the window-shaped groove, and a limit block is also arranged on the top of the fixed table, and an inclined groove is provided on the side wall of the limit block, and the inclined groove is used to guide the airflow to disperse.

[0009] Preferably, the punching table assembly also includes a material guide table connected to the side wall of the fixed table, and the side wall of the molding table is connected to the side wall of the material guide table; the top of the material guide table is set as an inclined surface for guiding out the punched and formed window film; the top of the material guide table is provided with a plurality of arc grooves 1, and the top of the molding table is provided with a plurality of arc grooves 2, and the arc grooves 1 are connected with the arc grooves 2 to form a movable groove; the molding table side wall is rotatably arranged with a rotating rod, and the circumferential outer wall of the rotating rod is connected with a plurality of material discharge top plates, and the material discharge top plates are movably arranged in the movable groove, and one end of the rotating rod movably passes through the side wall of the fixed table and is connected to gear 1; the top of the fixed table is also provided with motor 1, and the output end of motor 1 is connected to gear 2, and gear 2 is meshed with gear 1.

[0010] Preferably, a lifting plate and a bottom plate are arranged under the molding table, the bottom of the piston is connected to the lifting plate through a guide rod, and the guide rod moves through the bottom of the molding table; a plurality of guide rods are connected to the top of the bottom plate, and the guide rods move through the top of the lifting plate, and a spring is provided on the circumferential outer wall of the guide rod.

[0011] Preferably, the top of the base plate is also connected to an air cylinder, the high end of the circumferential outer wall of the air cylinder is connected to an air intake pipe, and the low end of the circumferential outer wall of the air cylinder is provided with a plurality of exhaust holes; the bottom of the lifting plate is connected to piston 2 through guide rod 2, and the guide rod 2 movably passes through the top of the air cylinder and extends to the inner cavity of the air cylinder, and the piston 2 movably cooperates with the inner cavity of the air cylinder, and the piston 2 is arranged below the air intake pipe.

[0012] Preferably, the airflow control box is arranged on the top of the base, and the outer side wall of the airflow control box is provided with output tube 1, output tube 2 and output tube 3 connected to its inner cavity; the output tube 1 is connected to the first airflow channel through flexible tube 1; the output tube 2 is connected to the air intake pipe through flexible tube 2; the output tube 3 is connected to the second airflow channel through flexible tube 3; a long groove is provided on the inner side wall of the airflow control box, and the long groove is connected to the input end of the output tube 1.

[0013] Preferably, the airflow component also includes motor 2 arranged on the top of the base, and the output end of motor 2 is connected to gear 3; the side wall of the adjusting rotor is connected to a rotating column, and the rotating column moves through the side wall of the airflow control box, and the adjusting rotor rotates with the inner cavity of the airflow control box through the rotating column, and the outer circumferential wall of the rotating column is connected to gear 4 which is meshed with gear 3.

[0014] Preferably, the rotating column is a hollow tubular structure, the inner cavity of the rotating column is connected to the air supply channel, and the end of the rotating column is movably connected to an external pipe, which is installed on the external air supply equipment and connected to the output end of the external air supply equipment.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The present invention arranges a first air flow channel in the inner cavity of the die, and opens a plurality of circular grooves on the top of the forming table, wherein a piston 1 is movably arranged in the circular groove. When the coil is unfolded and conveyed to the top of the forming table, the air flow is first conveyed into the first air flow channel by adjusting the rotor, and then blown out from the plurality of first inclined channels to the top of the forming area of ​​the coil, thereby blowing pressure on the forming area of ​​the coil, flexibly smoothing the forming area of ​​the coil, and eliminating the bending and warping caused by long-term roll storage. After the coil is flexibly smoothed, the adjusting rotor can synchronously adjust the piston 1 to move downward in the circular groove, so that negative pressure is formed in the inner cavities of the plurality of circular grooves, and the bottom of the forming area of ​​the coil is adsorbed and fixed, and then the conveying to the first air flow channel is stopped by adjusting the adjusting rotor. The airflow makes the forming area of ​​the coil only affected by the adsorption effect of the circular groove, and remains flat and stable on the top of the molding table. Stopping the airflow to the first airflow channel can avoid the situation that when the cutter is close to the coil, the airflow output space is compressed, the airflow is easily turbulent, the local airflow intensity is high, and the coil vibrates. The top of the forming area of ​​the coil is first flexibly smoothed to keep the coil flat, and then the coil is fixed by the adsorption effect of the circular groove, thereby ensuring the accurate punching of the coil by the cutter, and obtaining a window film that meets the shape of the window, solving the problem that the coil is prone to bending and warping after unfolding, which seriously affects the punching accuracy and quality of the finished product.

[0017] 2. The present invention also designs multiple first inclined channels arranged in a circular array on the side wall of the hemispherical protrusion block to be inclined away from the axis of the hemispherical protrusion block. When the air flow enters the inner cavity of the hemispherical protrusion block through the first air flow channel, it is ejected through multiple first inclined channels. The ejected air flow forms a certain angle with the surface of the roll. The air flow will form a radial airflow field radiating from the axis of the hemispherical protrusion block to the surrounding areas. The radial airflow field can evenly blow pressure on the top of the forming area of ​​the roll from the center to the surrounding areas, effectively flatten the forming area of ​​the roll, and use airflow to achieve flexible contact, which can better protect the surface of the roll.

[0018] 3. The present invention also arranges the second air flow channel in a semi-enclosed shape on the side of the cutter, and tilts the output ends of multiple second inclined channels away from the side wall of the cutter, so that the ejected air flow acts on the non-forming area of ​​the coil at a certain angle, forming a flexible downward pressure effect on the non-forming area of ​​the coil. When the cutter punches the coil, the non-forming area is flexibly pressed down and fixed, which can avoid problems such as burrs and wrinkles caused by warping of the edge of the non-forming area of ​​the coil during the punching process; makes the edge of the punched and formed window film more neat, and improves the appearance quality and accuracy of the finished product. If the air flow is ejected vertically, it may form a vortex near the cutter, interfering with the punching accuracy or causing the non-forming area of ​​the coil to be blown up, while the outward-tilted air flow direction can guide the air flow away from the cutter working area, avoid the interference of the air flow on the cutter punching area, and ensure the accuracy of punching and forming.

[0019] 4. The present invention provides a long slot on the side wall of the inner cavity of the air flow control box. When the regulating rotor rotates and the air flow conveying slot and the input end of the output pipe 1 are gradually misaligned, the air flow needs to enter the output pipe 1 through the long slot. Due to the shape and position characteristics of the long slot, as the regulating rotor rotates, the cross-sectional area of ​​the channel through which the air flow passes through the long slot gradually decreases, thereby gradually reducing the amount of air entering the output pipe 1 and gradually increasing the air pressure in the air flow conveying slot. When the air pressure increases to a certain level, the air flow will flow into the output pipe 2 through the narrow slot, thereby realizing the transition of the air flow from the output pipe 1 to the output pipe 2, so that the first air flow channel blows and presses the top of the coil forming area to smooth it in the later stage. The air flow can flow into the output pipe 2 and enter the air cylinder. The piston 2 in the air cylinder begins to move downward under the push of the air flow, and the lifting plate is driven down by the guide rod 2, thereby causing the piston 1 to move downward in the circular groove. The inner cavity of the circular groove gradually forms a negative pressure, which generates an adsorption force on the bottom of the forming area of ​​the coil. As the adjusting rotor continues to rotate, when the air flow conveying groove is completely connected with the input end of the output pipe 2 and separated from the long groove, a stable negative pressure is formed in the circular groove, completing the adsorption and fixation of the forming area. At the same time, the first air flow channel stops supplying air, ensuring that the forming area of ​​the coil is not disturbed by the air flow blowing pressure during the punching and forming process, providing a stable coil state for the punching and forming operation, and achieving the effect of smoothing first and then adsorbing and fixing. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 Schematic diagram of the vehicle window film structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the overall structure of the punching device of the present invention.

[0022] Figure 3 This is a schematic diagram of the overall structure of the punching device of the present invention from another perspective.

[0023] Figure 4 It is a schematic diagram of the bottom structure of the die of the present invention.

[0024] Figure 5It is a schematic diagram of the cutaway structure of the die of the present invention.

[0025] Figure 6 This is a schematic diagram of the second oblique channel structure of the present invention.

[0026] Figure 7 It is a schematic diagram of the disassembled structure of the punching platform assembly of the present invention.

[0027] Figure 8 It is a schematic diagram of the grooving structure of the present invention.

[0028] Figure 9 It is a schematic diagram of the bottom structure of the limit block of the present invention.

[0029] Figure 10 It is a schematic structural diagram of the airflow component, die and material guide platform of the present invention.

[0030] Figure 11 It is a schematic diagram of the circular groove cutaway structure of the present invention.

[0031] Figure 12 It is a schematic diagram of the cutaway structure of the movable groove of the present invention.

[0032] Figure 13 It is a schematic diagram of the cross-section structure of the gas cylinder of the present invention.

[0033] Figure 14 Schematic diagram of the airflow assembly structure of the present invention.

[0034] Figure 15 This is a schematic diagram of the cross-section structure of the airflow control box of the present invention.

[0035] Figure 16 This is a schematic diagram of the regulating rotor structure of the present invention.

[0036] Description of the numbers in the figure:

[0037] 2. Base; 3. Punching assembly; 4. Punching table assembly; 5. Airflow assembly;

[0038] 101. Coil; 102. Window film;

[0039] 301, support frame; 302, hydraulic cylinder; 303, die; 304, cutter; 305, first air flow channel; 306, first oblique channel; 307, second air flow channel; 308, second oblique channel; 309, hemispherical raised block;

[0040] 401. Forming table; 402. Circular groove; 403. Piston 1; 404. Fixed table; 405. Window groove; 406. Cutting groove; 407. Stop block; 408. Inclined groove; 409. Material guide table; 410. Movable groove; 411. Rotating rod; 412. Unloading top plate; 413. Gear 1; 414. Motor 1; 415. Gear 2; 416. Lifting plate; 417. Bottom plate; 418. Guide rod 1; 419. Guide rod; 420. Spring; 421. Cylinder; 422. Inlet pipe; 423. Exhaust hole; 424. Guide rod 2; 425. Piston 2.

[0041] 501. Airflow control box; 502. Adjusting rotor; 503. Airflow conveying trough; 504. Narrow slot; 505. Air supply channel; 506. Motor 2; 507. Gear 3; 508. Output tube 1; 509. Output tube 2; 510. Output tube 3; 511. Flexible tube 1; 512. Flexible tube 2; 514. Flexible tube 3; 515. Rotating column; 516. Gear 4; 517. External tube; 518. Long slot. DETAILED DESCRIPTION

[0042] like Figures 1 to 16 As shown, the present invention relates to a high-precision punching device for automotive decorative film, comprising a base 2, with a punching assembly 3, a punching platform assembly 4, and an airflow assembly 5 arranged on top of the base 2. The punching assembly 3 includes a die 303, with a cutter 304 mounted on the bottom of the die 303. The inner cavity of the die 303 is arranged with a first airflow channel 305 and a second airflow channel 307. The output end of the first airflow channel 305 is connected to a plurality of first oblique channels 306, and the output end of the second airflow channel 307 is connected to a plurality of second oblique channels 308. The punching platform assembly 4 includes a molding platform 401, the top of which is in the shape of a car window and has a plurality of circular grooves 402 formed therein. A piston 403 is movably arranged in the circular grooves 402. The airflow assembly 5 includes an airflow control box 501, the inner cavity of which is arranged an adjusting rotor 502. The side wall of the adjusting rotor 502 is provided with an airflow conveying groove 503 and a narrow groove 504, which are connected to each other. The inner wall of the airflow conveying groove 503 is provided with an air supply channel 505, which is used to continuously supply airflow into the airflow conveying groove 503. The adjusting rotor 502 can adjust the airflow to blow pressure on the top of the forming area of ​​the coil 101, forming a flexible smoothing. During this process, the adjusting rotor 502 can adjust the multiple pistons 403 to move downward, so that the inner cavity of the multiple circular grooves 402 forms a negative pressure, forming an adsorption fixation on the bottom of the forming area of ​​the coil 101. After the adsorption fixation is completed, the adjusting rotor 502 can adjust the airflow to blow pressure on the top of the non-forming area of ​​the coil 101, forming a flexible downward pressure on the non-forming area.

[0043] The present invention arranges a first air flow channel 305 in the inner cavity of the die 303, and opens a plurality of circular grooves 402 on the top of the forming table 401, and a piston 1 403 is movably arranged in the circular groove 402. When the coil 101 is unfolded and conveyed to the top of the forming table 401, the air flow is first conveyed into the first air flow channel 305 by adjusting the rotor 502, and is blown out by the plurality of first inclined channels 306 to the top of the forming area of ​​the coil 101, so as to flexibly smooth the forming area of ​​the coil 101 and eliminate the bending and warping caused by long-term roll storage. After the coil 101 is flexibly smoothed, the regulating rotor 502 can synchronously adjust the piston 1 403 to move downward in the circular groove 402, so that the inner cavity of the plurality of circular grooves 402 forms a negative pressure, so as to form an adsorption fixation on the bottom of the forming area of ​​the coil 101, and then the regulating rotor 502 is adjusted to stop the first air flow channel 305. The flow channel 305 conveys airflow so that the forming area of ​​the coil 101 is only affected by the adsorption effect of the circular groove 402, and is kept flat and stable on the top of the molding table 401. Stopping the supply of airflow to the first airflow channel 305 can prevent the cutter 304 from punching the coil 101. When the cutter is close to the coil 101, the airflow output space is compressed, airflow turbulence is likely to occur, and the local airflow intensity is high, causing the coil 101 to vibrate. By first flexibly smoothing the top of the forming area of ​​the coil 101 to keep it flat, and then fixing the coil 101 through the adsorption effect of the circular groove 402, the cutter 304 can ensure that the coil 101 is accurately punched, and a window film 102 that conforms to the shape of the window is obtained. This solves the problem of the coil 101 being easily bent and warped after unfolding, which seriously affects the punching accuracy and quality of the finished product.

[0044] After the adsorption and fixation are completed, the rotor 502 is adjusted to adjust the airflow to enter the second airflow channel 307, and blown out by multiple second inclined channels 308, blowing pressure on the top of the non-forming area of ​​the coil 101, forming a flexible downward pressure on the non-forming area, preventing the non-forming area from warping during the punching process and affecting the stability of the coil 101 in the forming area. Finally, the die 303 is lowered to make the cutter 304 accurately punch the coil 101 to obtain a window film 102 that conforms to the shape of the window. When the cutter 304 moves upward, the airflow still blows pressure on the top of the non-forming area of ​​the coil 101 to prevent the cutter 304 from driving the non-forming area of ​​the coil 101 upward due to friction.

[0045] In this embodiment of the present invention, the punching assembly 3 includes a support frame 301, which serves as a support base and is fixedly mounted on the base 2, providing stable support for the entire punching assembly 3. A hydraulic cylinder 302 is mounted on the support frame 301. The output end of the hydraulic cylinder 302 is connected to the top of the die 303. The hydraulic cylinder 302's telescopic movement drives the die 303 to move vertically up and down, thereby driving the cutter 304 to perform the punching and lifting movements. The cutter 304 is a long, curved structure that forms the contour of the window film 102. In conjunction with the molding table 401, which has a window-shaped top, it can punch and shape the window film 102 from the web 101.

[0046] As another embodiment of the present invention, a hemispherical protrusion block 309 is connected to the bottom of the die 303, and the output ends of multiple first inclined channels 306 are arranged in a ring array on the side wall of the hemispherical protrusion block 309, and the output ends of the first inclined channels 306 are inclined away from the axial position of the hemispherical protrusion block 309; the second air flow channel 307 is arranged in a semi-enclosed shape on the side of the cutter 304, and the output ends of multiple second inclined channels 308 are respectively inclined away from the side wall of the cutter 304. The present invention arranges multiple first inclined channels 306 in a circular array on the side wall of the hemispherical protrusion block 309 to be inclined away from the axis of the hemispherical protrusion block 309. When the air flow enters the inner cavity of the hemispherical protrusion block through the first air flow channel 305, it is ejected through the multiple first inclined channels 306. The ejected air flow forms a certain angle with the surface of the coil 101. The air flow will form a radial airflow field radiating to the surrounding areas with the axis of the hemispherical protrusion block as the center. The radial airflow field can evenly blow pressure on the top of the forming area of ​​the coil 101 radially from the center to the surrounding areas, can effectively flatten the forming area of ​​the coil 101, and use airflow to achieve flexible contact, which can better protect the surface of the coil 101.

[0047] The present invention also arranges the second air flow channel 307 in a semi-enclosed shape on the side of the cutter 304, and tilts the output ends of multiple second inclined channels 308 away from the side wall of the cutter 304, so that the ejected air flow acts on the non-forming area of ​​the coil 101 at a certain angle, forming a flexible downward pressure effect on the non-forming area of ​​the coil 101. When the cutter 304 punches the coil 101, the non-forming area is flexibly pressed down and fixed, which can avoid burrs, wrinkles and other problems caused by the warping of the edge of the non-forming area of ​​the coil 101 during the punching process, making the edge of the window film 102 more neat, and improving the appearance quality and accuracy of the finished product. If the air flow is ejected vertically, it may form a vortex near the cutter 304, interfering with the punching accuracy or causing the non-forming area of ​​the coil 101 to be blown up. The outward-tilted air flow direction can guide the air flow away from the working area of ​​the cutter 304, avoiding the interference of the air flow on the punching area of ​​the cutter 304, and ensuring the accuracy of punching and forming.

[0048] In an embodiment of the present invention, the punching table assembly 4 also includes a fixed table 404, a window-shaped groove 405 is opened on the top of the fixed table 404, the forming table 401 is arranged in the window-shaped groove 405, and a cutting groove 406 is formed between the forming table 401 and the inner wall of the window-shaped groove 405. When the cutter 304 punches the unfolded coil 101, the cutter 304 can cut into the cutting groove 406 to realize the cutting and forming effect of the coil 101. A limit block 407 is also arranged on the top of the fixed table 404. The limit block 407 is used to limit the punching depth of the die 303. The die 303 stops after punching to the top of the limit block 407. Multiple side walls of the limit block 407 are respectively provided with inclined grooves 408. The inclined grooves 408 are used to guide the airflow to disperse. When the airflow is ejected through the multiple first inclined channels 306, the ejected airflow blows radially toward the surface of the coil 101, and can be guided out through the inclined grooves 408 to form a good flow channel. When the cutter 304 punches the unfolded coil 101, the airflow is output from the multiple second inclined channels 308, and the ejected airflow acts on the non-forming area of ​​the coil 101 at a certain angle, and is blown out from the multiple inclined grooves 408 respectively, ensuring the smooth flow of air.

[0049] In an embodiment of the present invention, the punching table assembly 4 also includes a material guide table 409 connected to the side wall of the fixed table 404, and the side wall of the forming table 401 is connected to the side wall of the material guide table 409; the top of the material guide table 409 is set as an inclined surface for guiding out the punched and formed window film 102; a plurality of arc grooves 1 are opened on the top of the material guide table 409, and a plurality of arc grooves 2 are opened on the top of the forming table 401, and the arc grooves 1 and the arc grooves 2 are connected to form a movable groove 410; a rotating rod 411 is rotatably arranged on the side wall of the forming table 401, and a plurality of unloading top plates 412 are connected to the outer wall of the rotating rod 411, and the unloading top plates 412 are movably arranged in the movable groove 410, and one end of the rotating rod 411 movably passes through the side wall of the fixed table 404 and is connected to a gear 1 413; a motor 1 414 is also arranged on the top of the fixed table 404, and the output end of the motor 1 414 is connected to a gear 2 415, and the gear 2 415 is meshed with the gear 1 413. After the motor 1 414 is started, it drives the gear 2 415 to rotate, and through the meshing transmission, the gear 1 413 drives the rotating rod 411 to rotate, and then the unloading top plate 412 connected to the rotating rod 411 rotates in the movable groove 410 formed by the connection between the arc groove 1 of the guide table 409 and the arc groove 2 of the forming table 401. When the cutter 304 completes the punching, the rotation of the unloading top plate 412 in the movable groove 410 can lift the window film 102 attached to the forming table 401, and the window film 102 slides from the top of the unloading top plate 412 to the top of the guide table 409. The inclined surface of the guide table 409 can make the window film 102 slide naturally due to gravity, and assist it to be guided out along the inclined surface of the guide table 409, thereby realizing efficient and automatic unloading of the window film 102 after punching.

[0050] In this embodiment of the present invention, a lifting plate 416 and a base plate 417 are arranged below the molding platform 401. The bottom of piston 1 403 is connected to the lifting plate 416 via a guide rod 1 418, which movably extends through the bottom of the molding platform 401. A plurality of guide rods 419 are connected to the top of the base plate 417, which movably extend through the top of the lifting plate 416. Springs 420 are sleeved around the outer circumference of the guide rods 419. An air cylinder 421 is also connected to the top of the base plate 417. An air inlet pipe 422 is connected to the upper end of the outer circumference of the air cylinder 421, and a plurality of exhaust holes 423 are defined at the lower end of the outer circumference of the air cylinder 421. The bottom of the lifting plate 416 is connected to piston 2 425 via a guide rod 2 424, which movably extends through the top of the air cylinder 421 and into the inner cavity of the air cylinder 421. Piston 2 425 movably engages with the inner cavity of the air cylinder 421 and is arranged below the air inlet pipe 422. When the air flow enters the air cylinder 421 through the air inlet pipe 422, it pushes the second piston 425 to move downward, and the gas in the air cylinder is discharged from the exhaust hole 423. The second piston 425 drives the lifting plate 416 to move downward along the guide rod 419 and compress the spring 420 through the second guide rod 424. At this time, the guide rod 1 418 pulls the first piston 403 to move downward in the circular groove 402 of the molding table 401, so that the inner cavity of the circular groove 402 forms a negative pressure adsorption molding area for the coil 101; when the air flow in the air cylinder 421 is released, the elastic force of the spring 420 pushes the lifting plate 416 to move upward, and the second piston 425 rises accordingly. At the same time, the first piston 403 rises and resets, releasing the adsorption of the coil 101, realizing a cycle of adsorption and release.

[0051] In an embodiment of the present invention, the airflow control box 501 is arranged on the top of the base 2, and the outer wall of the airflow control box 501 is provided with an output tube 1 508, an output tube 2 509 and an output tube 3 510 connected to its inner cavity; the output tube 1 508 is connected to the first airflow channel 305 through the flexible tube 1 511; the output tube 2 509 is connected to the air inlet pipe 422 through the flexible tube 2 512; the output tube 3 510 is connected to the second airflow channel 307 through the flexible tube 3 514; the inner cavity side wall of the airflow control box 501 is provided with a long groove 518, and the long groove 518 is connected to the input end of the output tube 1 508.

[0052] In an embodiment of the present invention, the airflow assembly 5 further includes a second motor 506 disposed on the top of the base 2, the output end of which is connected to a third gear 507. A rotating column 515 is connected to the side wall of the regulating rotor 502, which movably extends through the side wall of the airflow control box 501. The regulating rotor 502 rotates in conjunction with the interior of the airflow control box 501 via the rotating column 515. The outer circumferential wall of the rotating column 515 is connected to a fourth gear 516 that meshes with the third gear 507. The rotating column 515 is a hollow tubular structure, the interior of the rotating column 515 communicating with the air supply channel 505. An external pipe 517 is movably connected to the end of the rotating column 515, which is mounted on an external air supply device and connected to the output end of the external air supply device. The external air supply device supplies air to the hollow inner cavity of the rotating column 515 through the external pipe 517. The airflow enters the air supply channel 505 of the regulating rotor 502 through the inner cavity of the rotating column 515 and is continuously input into the air flow conveying groove 503 of the regulating rotor 502. After the motor 2 506 is started, it drives the gear 3 507 to rotate, and drives the rotating column 515 to rotate through the meshing gear 4 516, thereby driving the regulating rotor 502 to rotate in the inner cavity of the air flow control box 501. When the regulating rotor 502 rotates and the air flow conveying groove 503 is connected to the input end of the output pipe 1 508, the airflow flows into the output pipe 1 508, and is then conveyed to the first air flow channel 305 through the flexible pipe 1 511 for blowing and smoothing the top of the coil forming area; as the regulating rotor 502 rotates, the air flow conveying groove 503 Gradually, it becomes misaligned with the input end of output tube 1 508, and the air flow enters output tube 1 508 through the long groove 518, causing the air flow entering output tube 1 508 to gradually decrease, while the air pressure value in the air flow conveying groove 503 gradually increases, causing the air flow in the air flow conveying groove 503 to flow into output tube 2 509 through the narrow groove 504, and be conveyed to the air inlet pipe 422 through the flexible tube 2 512, and enter the air cylinder 421, driving the piston 2 425 in the air cylinder 421 to start moving downward until the air flow conveying groove 503 is completely connected with the input end of output tube 2 509 and is separated from the long groove 518. At this time, a negative pressure adsorption coil forming area is completely formed in the circular groove 402, and the first air flow channel 305 stops conveying air flow, ending the blowing and smoothing of the top of the coil forming area.The regulating rotor 502 continues to rotate, and the air flow conveying groove 503 is separated from the output tube 2 509. The input end of the output tube 2 509 is sealed by the side wall of the regulating rotor 502, so that the air pressure in the air cylinder 421 remains stable. The circular groove 402 stably adsorbs the web forming area. The air flow conveying groove 503 is connected to the output tube 3 510. The air flow enters the flexible tube 3 514 through the output tube 3 510 until it flows into the second air flow channel 307 and is blown out through the multiple second inclined channels 308, blowing pressure on the top of the non-forming area of ​​the web 101, forming a flexible downward pressure on the non-forming area; then the web 101 is punched and formed by the cutter 304. After the forming operation of the vehicle window film 102 is completed, the external air supply equipment stops supplying air, and the regulating rotor 502 is reset, so that the output tube 2 509 is connected to the output tube 1 508 through the narrow groove 504 and the air flow conveying groove 503, and the air flow in the air cylinder 421 is released, so that the piston 1 403 in the circular groove 402 is reset. By controlling and adjusting the rotation angle of the rotor 502 through the motor 2 506, the airflow is accurately switched and distributed among the output pipe 1 508, the output pipe 2 509, and the output pipe 3 510, and the airflow control process of smoothing, adsorbing, and pressing the web is completed in sequence, ensuring the coordinated operation of each link of the punching and cutting device.

[0053] The present invention provides a long slot 518 on the side wall of the inner cavity of the airflow control box 501. When the regulating rotor 502 rotates and the airflow conveying slot 503 gradually misaligns with the input end of the output pipe 1 508, the airflow needs to pass through the long slot 518 to enter the output pipe 1 508. Due to the shape and position characteristics of the long slot 518, as the regulating rotor 502 rotates, the cross-sectional area of ​​the channel through which the airflow passes through the long slot 518 gradually decreases, thereby causing the amount of air entering the output pipe 1 508 to gradually decrease and the air pressure value in the airflow conveying slot 503 to gradually increase. When the air pressure increases to a certain level, the airflow will pass through the narrow slot 504 and flow into the output pipe 2 509, thereby achieving the transition of the airflow from the output pipe 1 508 to the output pipe 2 509. In the later stage of the first airflow channel 305 blowing and smoothing the top of the coil forming area, the airflow can flow into the output pipe 2 509 and enter the air cylinder 421. The piston 2 425 in the air cylinder 421 is pushed by the airflow. It starts to move downward, and the lifting plate 416 is driven down by the guide rod 2 424, thereby causing the piston 1 403 to move downward in the circular groove 402. A negative pressure is gradually formed in the inner cavity of the circular groove 402, which generates an adsorption force on the bottom of the forming area of ​​the coil 101. As the adjusting rotor 502 continues to rotate, the air flow conveying groove 503 is completely connected with the input end of the output pipe 2 509 and separated from the long groove 518. A stable negative pressure is formed in the circular groove 402, completing the adsorption and fixation of the forming area. At the same time, the first air flow channel 305 stops supplying air, ensuring that the forming area of ​​the coil is not disturbed by the air flow blowing pressure during the punching and forming process, providing a stable coil state for the punching and forming operation, and achieving the effect of smoothing first and then adsorbing.

[0054] Working Principle: This embodiment provides a high-precision punching device for automotive decorative film. During use, the coil 101 is first unrolled and conveyed to the top of the forming table 401 via an external conveying device. An external air supply device then supplies air to the hollow interior of the rotating column 515 via an external pipe 517. The air flows through the interior of the rotating column 515 into the air supply channel 505 of the regulating rotor 502 and is continuously fed into the air flow conveying slot 503 of the regulating rotor 502. Motor 2 506 is activated, driving gear 3 507 to rotate. This, in turn, drives the rotating column 515 to rotate via meshing gear 4 516, thereby driving the regulating rotor 502 to rotate within the interior of the air flow control box 501.

[0055] When the regulating rotor 502 rotates until the air flow conveying groove 503 is connected to the input end of the output pipe 1 508, the air flow flows into the output pipe 1 508, is then conveyed to the first air flow channel 305 through the flexible pipe 1 511, and finally is ejected obliquely from the first inclined channel 306 on the side wall of the hemispherical protrusion 309, forming a radial air flow field, flexibly smoothing the top of the forming area of ​​the coil 101, eliminating bending and warping caused by long-term coil storage.

[0056] As the regulating rotor 502 continues to rotate, the airflow conveying groove 503 gradually becomes misaligned with the input end of the output tube 1 508 . The cross-sectional area of ​​the channel through which the airflow enters the output tube 1 508 through the long groove 518 gradually decreases, and the amount of air entering the first airflow channel 305 gradually decreases. The air pressure in the airflow conveying groove 503 gradually increases. When the air pressure reaches a certain level, the airflow flows through the narrow groove 504 into the output tube 2 509 , and is transported to the air inlet pipe 422 through the flexible tube 2 512 , entering the air cylinder 421 , pushing the piston 2 425 downward. The piston 2 425 drives the lifting plate 416 downward via the guide rod 2 424 . The lifting plate 416 pulls the piston 1 403 downward within the circular groove 402 via the guide rod 1 418 , creating a negative pressure within the circular groove 402, thereby adsorbing and fixing the bottom of the forming area of ​​the coil 101 .

[0057] When the regulating rotor 502 rotates until the air flow conveying groove 503 is completely connected to the input end of the second output pipe 509 and separated from the long groove 518, a stable negative pressure is formed in the circular groove 402, and the first air flow channel 305 stops conveying air, ending the blowing and smoothing of the forming area. At this time, the forming area of ​​the web 101 is stably adsorbed on the top of the forming table 401.

[0058] The regulating rotor 502 continues to rotate, separating the airflow trough 503 from the second output tube 509. The input end of the second output tube 509 is sealed by the sidewall of the regulating rotor 502. The air pressure within the air cylinder 421 remains stable, and the circular groove 402 continues to attract the forming area. Simultaneously, the airflow trough 503 connects to the third output tube 510. The airflow enters the third flexible tube 514 through the third output tube 510, flows into the second airflow channel 307, and is blown out through the multiple second inclined channels 308, applying flexible downward pressure to the top of the non-forming area of ​​the web 101, preventing it from warping during the punching process.

[0059] Subsequently, the hydraulic cylinder 302 is activated, driving the die 303 to descend, and the cutter 304 accurately cuts the coil 101, and with the cooperation of the molding table 401, the shape of the window film 102 is punched out. When cutting, the cutter 304 cuts into the groove 406 between the molding table 401 and the inner wall of the window-shaped groove 405, completing the cutting of the coil 101;

[0060] After punching is completed, the external air supply device stops supplying air, and the rotor 502 is adjusted to return to its original position, so that the second output pipe 509 is connected to the first output pipe 508 through the narrow slot 504 and the air flow conveying slot 503. The air in the air cylinder 421 is released and discharged, and the spring 420 pushes the lifting plate 416 upward, and the piston 1 403 rises and returns to its original position, releasing the suction on the coil 101.

[0061] Finally, motor 1 414 is started, driving gear 2 415 to rotate, which in turn rotates the rotating rod 411 through gear 1 413. The unloading top plate 412 rotates in the movable groove 410, lifting the window film 102 attached to the molding table 401. The window film 102 is then guided out along the inclined surface of the guide table 409, completing a punching process.

[0062] The embodiments disclosed in the present invention are preferred embodiments, but are not limited to them. Ordinary technicians in this field can easily understand the spirit of the present invention based on the above embodiments and make different extensions and changes. As long as they do not deviate from the spirit of the present invention, they are all within the scope of protection of the present invention.

Claims

1. A high-precision punching device for automobile decorative film, characterized in that: It comprises a base (2), wherein a punching assembly (3), a punching platform assembly (4) and an airflow assembly (5) are arranged on the top of the base (2); The punching assembly (3) comprises a punching die (303), a cutter (304) is installed at the bottom of the punching die (303), a first airflow channel (305) and a second airflow channel (307) are arranged in the inner cavity of the punching die (303), the output end of the first airflow channel (305) is connected to a plurality of first oblique channels (306), and the output end of the second airflow channel (307) is connected to a plurality of second oblique channels (308); The punching platform assembly (4) includes a molding platform (401), the top of the molding platform (401) is in the shape of a car window, a plurality of circular grooves (402) are provided on the top of the molding platform (401), and a piston (403) is movably arranged in the circular groove (402); The airflow assembly (5) comprises an airflow control box (501), an inner cavity of the airflow control box (501) is provided with an adjusting rotor (502), a side wall of the adjusting rotor (502) is provided with an airflow conveying groove (503) and a narrow groove (504), the airflow conveying groove (503) and the narrow groove (504) are connected, an inner side wall of the airflow conveying groove (503) is provided with an air supply channel (505), and the air supply channel (505) is used to continuously convey airflow into the airflow conveying groove (503); The regulating rotor (502) can regulate the airflow to blow pressure toward the top of the forming area of ​​the coil (101) to form a flexible smoothing. During this period, the regulating rotor (502) can regulate the multiple pistons (403) to move downward, so that a negative pressure is formed in the inner cavity of the multiple circular grooves (402), and the bottom of the forming area of ​​the coil (101) is adsorbed and fixed. After the adsorption and fixation are completed, the regulating rotor (502) can regulate the airflow to blow pressure toward the top of the non-forming area of ​​the coil (101), forming a flexible downward pressure on the non-forming area.

2. The high-precision punching device for automobile decorative film according to claim 1, characterized in that: The punching assembly (3) comprises a support frame (301), a hydraulic cylinder (302) is arranged on the support frame (301), an output end of the hydraulic cylinder (302) is connected to the top of the punching die (303), and the cutter (304) is a long curved structure, used for punching and forming the shape of the vehicle window film (102) on the coil (101).

3. The high-precision punching device for automobile decorative film according to claim 2, characterized in that: The bottom of the punching die (303) is connected to a hemispherical protrusion block (309), and the output ends of the plurality of the first oblique channels (306) are arranged in a ring array on the side wall of the hemispherical protrusion block (309), and the output ends of the first oblique channels (306) are inclined away from the axis position of the hemispherical protrusion block (309); The second air flow channel (307) is arranged in a semi-enclosed shape on the side of the cutter (304), and the output ends of the plurality of second oblique channels (308) are inclined in a direction away from the side wall of the cutter (304).

4. The high-precision punching device for automobile decorative film according to claim 3, characterized in that: The punching platform assembly (4) further includes a fixed platform (404), a window-shaped groove (405) is provided on the top of the fixed platform (404), the molding platform (401) is arranged in the window-shaped groove (405), and a groove (406) is formed between the molding platform (401) and the inner side wall of the window-shaped groove (405). A limiting block (407) is further arranged on the top of the fixing platform (404), and a side wall of the limiting block (407) is provided with an inclined groove (408), and the inclined groove (408) is used to guide the airflow to disperse.

5. The high-precision punching device for automobile decorative film according to claim 4, characterized in that: The punching platform assembly (4) further includes a material guide platform (409) connected to the side wall of the fixed platform (404), and the side wall of the molding platform (401) is connected to the side wall of the material guide platform (409); The top of the material guide platform (409) is configured as an inclined surface for guiding the punched window film (102); The top of the guide platform (409) is provided with a plurality of arc grooves 1, and the top of the molding platform (401) is provided with a plurality of arc grooves 2, wherein the arc grooves 1 are connected to the arc grooves 2 to form a movable groove (410); A rotating rod (411) is rotatably arranged on the side wall of the molding platform (401), and a plurality of blanking top plates (412) are connected to the circumferential outer wall of the rotating rod (411). The blanking top plates (412) are movably arranged in the movable groove (410), and one end of the rotating rod (411) movably passes through the side wall of the fixed platform (404) and is connected to a gear 1 (413); A motor 1 (414) is also arranged on the top of the fixed platform (404), and the output end of the motor 1 (414) is connected to a gear 2 (415), and the gear 2 (415) is meshed and connected with the gear 1 (413).

6. The high-precision punching device for automobile decorative film according to claim 5, characterized in that: A lifting plate (416) and a bottom plate (417) are arranged below the molding platform (401), and the bottom of the piston (403) is connected to the lifting plate (416) via a guide rod (418), and the guide rod (418) movably passes through the bottom of the molding platform (401); A plurality of guide rods (419) are connected to the top of the bottom plate (417), and the guide rods (419) are movable through the top of the lifting plate (416). The outer circumferential wall of the guide rods (419) is provided with a spring (420).

7. The high-precision punching device for automobile decorative film according to claim 6, characterized in that: The top of the bottom plate (417) is also connected to an air cylinder (421), the upper end of the circumferential outer wall of the air cylinder (421) is connected to an air inlet pipe (422), and the lower end of the circumferential outer wall of the air cylinder (421) is provided with a plurality of exhaust holes (423); The bottom of the lifting plate (416) is connected to a second piston (425) via a second guide rod (424). The second guide rod (424) movably passes through the top of the gas cylinder (421) and extends to the inner cavity of the gas cylinder (421). The second piston (425) movably cooperates with the inner cavity of the gas cylinder (421). The second piston (425) is arranged below the air inlet pipe (422).

8. The high-precision punching device for automobile decorative film according to claim 7, characterized in that: The airflow control box (501) is arranged on the top of the base (2), and the outer wall of the airflow control box (501) is provided with an output tube 1 (508), an output tube 2 (509) and an output tube 3 (510) connected to the inner cavity thereof; The output tube 1 (508) is connected to the first air flow channel (305) through the flexible tube 1 (511); The second output pipe (509) is connected to the air inlet pipe (422) via the second flexible pipe (512); The output pipe three (510) is connected to the second air flow channel (307) through the flexible pipe three (514); A long groove (518) is provided on the inner side wall of the airflow control box (501), and the long groove (518) is connected to the input end of the output pipe (508).

9. The high-precision punching device for automobile decorative film according to claim 8, characterized in that: The airflow component (5) further includes a second motor (506) arranged on the top of the base (2), and an output end of the second motor (506) is connected to a third gear (507); The side wall of the regulating rotor (502) is connected to a rotating column (515), and the rotating column (515) is movable through the side wall of the airflow control box (501). The regulating rotor (502) rotates in conjunction with the inner cavity of the airflow control box (501) through the rotating column (515), and the outer circumferential wall of the rotating column (515) is connected to a gear four (516) meshing with the gear three (507).

10. The high-precision punching device for automobile decorative film according to claim 9, characterized in that: The rotating column (515) is a hollow tubular structure. The inner cavity of the rotating column (515) is in communication with the air supply channel (505). An external pipe (517) is movably connected to the end of the rotating column (515). The external pipe (517) is mounted on an external air supply device and connected to the output end of the external air supply device.

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