Scribing device for safety air bag cloth piece

Abstract

The utility model discloses a marking device for a safety air bag cloth piece. The marking device comprises a base, a sliding seat, a movable frame, an unwinding frame, a winding frame and a marking execution assembly. Mounting grooves with linear guide rails are symmetrically formed in the two sides of the top of the base, sliding seats are slidably mounted in the mounting grooves, second guide rods are vertically arranged on the inner sides of the two sliding seats in parallel, a movable frame is slidably mounted on the second guide rods, third guide rods are symmetrically arranged on the two sides in the front side of the movable frame, and a lifting table is slidably mounted on the third guide rods. By means of a multi-shaft linkage transmission system, micron-level positioning accuracy of scribing of the safety airbag cloth piece can be achieved, the problem of scribing deviation of traditional equipment is solved, the scribing speed is increased by means of an automatic unwinding and winding and cloth piece tensioning mechanism, the manual feeding error and the cloth piece loosening and wrinkling phenomena are eliminated, and the production efficiency is improved. And by means of the modularized and detachable component design, cloth pieces of different specifications can be quickly adapted, diversified scribing requirements can be met, and the universality and the production efficiency of the equipment are remarkably improved.

Description

Technical Field

[0001] This utility model relates to the field of airbag processing technology, and in particular to an airbag fabric marking device. Background Technology

[0002] With the continuous improvement of automotive safety standards, the airbag, as a key component of the automotive passive safety system, is directly related to the reliability and safety of the airbag when it deploys due to its manufacturing precision. The marking process of the airbag fabric is the basis for subsequent cutting, sewing and assembly. The precision and efficiency of the marking process have a decisive impact on product quality and production efficiency.

[0003] Currently, some companies still use manual marking for airbag fabric. Operators use hand-held marking tools to mark the fabric according to a template. This method is not only labor-intensive and inefficient, but also susceptible to human error, making it difficult to guarantee marking accuracy. Problems such as line deviation and dimensional errors can easily occur, resulting in fabric pieces that cannot meet assembly requirements after cutting, thus increasing the scrap rate.

[0004] To address the drawbacks of manual marking, some companies have introduced automated marking equipment. However, existing equipment still has many shortcomings. On the one hand, the mechanical structure of traditional automated marking equipment has limited precision, and the accumulation of errors in the transmission system can easily cause deviations in the marking position, making it difficult to meet the high-precision processing requirements of complex patterns on airbag fabric.

[0005] On the other hand, the existing equipment is not well designed in terms of fabric conveying and fixing. The fabric is prone to loosening, wrinkling or stretching during the marking process, which affects the marking quality. In addition, most equipment has a single function and lacks flexibility and versatility. It cannot quickly adapt to the production needs of different specifications of fabric and diverse marking patterns. Moreover, the equipment has a long material change and debugging time, resulting in low production efficiency and high equipment investment costs.

[0006] Therefore, how to provide a marking device for airbag fabric is a problem that urgently needs to be solved by those skilled in the art. Utility Model Content

[0007] One objective of this invention is to provide a marking device for airbag fabric. This invention can achieve micron-level positioning accuracy for marking airbag fabric through a multi-axis linkage transmission system, solving the marking deviation problem of traditional equipment. Furthermore, it utilizes an automated unwinding and rewinding mechanism and fabric tensioning mechanism to improve marking speed and eliminate errors caused by manual feeding and fabric looseness and wrinkles. With its modular and detachable component design, it can quickly adapt to different specifications of fabric and diverse marking requirements, significantly improving the equipment's versatility and production efficiency.

[0008] An airbag fabric marking device according to an embodiment of the present invention includes a base, a sliding seat, a movable frame, an unwinding frame, a rewinding frame, and a marking execution component.

[0009] The base has symmetrical mounting slots with linear guide rails on both sides of its top. Sliding seats are slidably installed in the mounting slots. Two sets of sliding seats have second guide rods arranged vertically and parallel to each other on their inner sides. Movable frames are slidably installed on the second guide rods. Third guide rods are symmetrically arranged on both sides of the front inner side of the movable frame. Lifting platforms are slidably installed on the third guide rods.

[0010] A marking table is fixedly installed at the center of the top of the base. Unwinding frames are symmetrically fixedly installed at the top of the base and at both ends behind the marking table. Unwinding rollers are detachably installed on the upper inner side of the unwinding frames. Rewinding frames are symmetrically fixedly installed at the top of the base and at both ends in front of the marking table. Rewinding rollers are detachably installed on the upper inner side of the rewinding frames. A rewinding motor is fixedly installed on one side of the outer wall of the rewinding frame. The output shaft of the rewinding motor is connected to the rewinding frame via a coupling.

[0011] Both the unwinding frame and the winding frame have support arms that are movably mounted on their inner sides via a rotating shaft. The other end of each support arm has a pressure roller that is movably mounted on it via a rotating shaft. The two sets of pressure rollers press against the fabric surfaces on the front and rear sides of the top of the marking table.

[0012] Furthermore, the base has first guide rods symmetrically arranged on both sides of the top, the first guide rods passing through the sliding seat and slidingly engaging with the sliding seat, and a first lead screw arranged below the first guide rods, the first lead screw passing through a pre-set lead screw hole inside the sliding seat and threadedly engaging with the lead screw hole, and a first motor symmetrically fixedly installed on both sides of the rear wall of the base, the output shaft of the first motor being connected to the first lead screw via a coupling, for driving the sliding seat to move horizontally along the first guide rods.

[0013] Furthermore, a second lead screw is rotatably mounted in the center of the inner side of each of the two sets of sliding seats. The second lead screw passes through a pre-set lead screw hole inside the movable frame and is threaded into the lead screw hole. A second motor is fixedly mounted on the outer wall of one side of the sliding seat. The output shaft of the second motor is connected to the second lead screw through a coupling and is used to drive the movable frame to move horizontally along the second guide rod.

[0014] Furthermore, a third lead screw is vertically and rotatably installed inside the front side of the movable frame. The third lead screw passes through a pre-set lead screw hole inside the lifting platform and is threaded into the lead screw hole. A third motor is fixedly installed on the top of the movable frame. The bottom output shaft of the third motor is connected to the third lead screw via a coupling, and is used to drive the lifting platform to move vertically up and down along the third guide rod.

[0015] Furthermore, both the unwinding roller and the winding roller are detachably installed. U-shaped slots are provided on the upper inner side of both the unwinding frame and the winding frame. The two ends of the roller shafts of the unwinding roller and the winding roller are engaged in the U-shaped slots, and the ends of the roller shafts are fixed to the unwinding frame and the winding frame by locking bolts.

[0016] Furthermore, a torsion spring is provided at the connection between the support arm and the unwinding frame and the winding frame. The torsion spring is used to apply a downward elastic force to the support arm so that the pressure roller always keeps in contact with the surface of the fabric.

[0017] Furthermore, the marking execution component includes a mounting base embedded in the front end of the lifting platform and a marking pen that can be detachably installed at the bottom of the mounting base. The bottom of the mounting base is provided with a threaded interface, and the top of the marking pen is provided with an external thread that matches the threaded interface, so as to realize the detachable installation of the marking pen.

[0018] Furthermore, the first motor, the second motor, and the third motor are all stepper motors, and their control circuits are connected in parallel to the same controller. The controller is used to synchronously control the start, stop, and speed of the three motors, so as to realize the coordinated movement of the sliding seat, the movable frame, and the lifting platform.

[0019] The beneficial effects of this utility model are:

[0020] This invention utilizes a winding motor to drive the winding and unwinding rollers to form an automatic fabric feeding system. This system works in conjunction with a three-axis moving mechanism to achieve simultaneous marking and fabric feeding, avoiding time losses caused by manual feeding and significantly improving marking efficiency. Furthermore, the pressure roller maintains a constant pressure under the continuous elastic pressure of the torsion spring, ensuring that the fabric remains flat and taut throughout the marking process. This eliminates defects such as blurred or broken lines caused by fabric slack. Additionally, the detachable unwinding roller, winding roller, and marking pen design significantly reduces auxiliary operation time such as changing materials and pen refills. Compared to traditional marking equipment, the overall processing efficiency is effectively improved, significantly enhancing enterprise production efficiency. Attached Figure Description

[0021] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0022] Figure 1 This is a schematic diagram of the overall structure of the airbag fabric marking device proposed in this utility model.

[0023] Figure 2 This is a structural diagram of the side plate disassembly of an airbag fabric marking device proposed in this utility model;

[0024] Figure 3This utility model provides a connection diagram of the mounting base, unwinding frame, and rewinding frame for an airbag fabric marking device.

[0025] Figure 4 This is a diagram of the marking execution component of a marking device for an airbag fabric panel proposed in this utility model.

[0026] In the diagram: 1. Base; 2. Sliding seat; 3. Second motor; 4. Second lead screw; 5. Second guide rod; 6. First motor; 7. Movable frame; 8. First guide rod; 9. Unwinding frame; 10. Rewinding frame; 11. Marking table; 12. First lead screw; 13. Unwinding roller; 14. Rewinding roller; 15. Rewinding motor; 16. Support arm; 17. Pressure roller; 18. Third motor; 19. Third lead screw; 20. Third guide rod; 21. Lifting platform; 22. Mounting seat; 23. Marking pen. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0028] Please see Figure 1-4 A marking device for airbag fabric includes a base 1, a sliding seat 2, a movable frame 7, an unwinding frame 9, a rewinding frame 10, and marking execution components.

[0029] In this embodiment, the base 1 is integrally formed from aluminum alloy. The top two sides are symmetrically machined with mounting grooves with linear guide rails. The sliding seat 2 is slidably installed in the mounting groove through the slider assembly. The gap between the sliding seat 2 and the guide rail is controlled within 0.05mm to ensure the movement accuracy.

[0030] Two sets of sliding seats 2 have second guide rods 5 arranged parallel to each other on their inner sides. The second guide rods 5 are fixedly connected to the sliding seats 2 via flanges. A movable frame 7 is slidably mounted on the guide rods. The movable frame 7 and the second guide rods 5 are fitted with linear bearings to reduce sliding friction. A third guide rod 20 is symmetrically arranged on both sides of the front inner side of the movable frame 7. The third guide rod 20 is fixed in the mounting hole of the movable frame 7 by set screws. A lifting platform 21 is slidably mounted on the guide rod. The lifting platform 21 and the third guide rod 20 are also fitted with linear bearings.

[0031] A marking table 11 is fixedly installed at the center of the top of the base 1 by M8 bolts. A unwinding frame 9 is fixedly welded to the top of the base 1 and at both ends behind the marking table 11. An unwinding roller 13 is detachably installed on the upper inner side of the unwinding frame 9. A winding frame 10 is symmetrically fixedly installed at the top of the base 1 and at both ends in front of the marking table 11. A winding roller 14 is detachably installed on the upper inner side of the winding frame 10. A winding motor 15 is fixedly installed on one side of the outer wall of the winding frame 10. The output shaft of the winding motor 15 is connected to the winding frame 10 through a coupling.

[0032] Please see Figure 1-4 The base 1 has symmetrical first guide rods 8 on both sides of the top. The first guide rods 8 pass through the sliding seat 2 and slide in cooperation with the sliding seat 2. The first lead screw 12 is provided below the first guide rod 8. The first lead screw 12 passes through the lead screw hole inside the sliding seat 2 and is threaded in cooperation with the lead screw hole. The first motor 6 is fixedly installed on both sides of the rear wall of the base 1 through the motor seat. The output shaft of the first motor 6 is connected to the first lead screw 12 through the flexible coupling. When the motor rotates forward and reverse, it can drive the sliding seat 2 to move horizontally along the first guide rod 8 with an accuracy of 0.01mm / step.

[0033] The inner sides of the two sets of sliding seats 2 are rotatably mounted with a second lead screw 4 via a deep groove ball bearing. The second lead screw 4 passes through a pre-set lead screw hole inside the movable frame 7 and is threaded into the lead screw hole. A second motor 3 is fixedly mounted on one side of the outer wall of the sliding seat 2 by bolts. The output shaft of the second motor 3 is connected to the second lead screw 4 via a coupling, driving the movable frame 7 to move horizontally along the second guide rod 5 with an accuracy of 0.008 mm / step.

[0034] The third lead screw 19 is rotatably mounted on the front interior of the movable frame 7 via an angular contact ball bearing. The third lead screw 19 passes through a pre-set lead screw hole inside the lifting platform 21 and is threaded into the lead screw hole. The third motor 18 is fixedly mounted on the top of the movable frame 7 via a motor flange. The bottom output shaft of the third motor 18 is connected to the third lead screw 19 via a coupling, driving the lifting platform 21 to vertically rise and fall along the third guide rod 20 with an accuracy of 0.006 mm / step.

[0035] Please see Figure 1-4 Both the unwinding roller 13 and the take-up roller 14 are detachable: U-shaped slots are provided on the upper inner side of the unwinding frame 9 and the take-up frame 10. The two ends of the roller shafts of the unwinding roller 13 and the take-up roller 14 are engaged in the U-shaped slots, and the ends of the roller shafts are fixed to the unwinding frame 9 and the take-up frame 10 by M10 locking bolts.

[0036] Both the unwinding frame 9 and the winding frame 10 have support arms 16 mounted on their inner sides via a pivot. A torsion spring is fitted at the connection between the support arm 16 and the pivot. One end of the torsion spring abuts against the inner wall of the unwinding frame 9 / winding frame 10, and the other end abuts against the inner side of the support arm 16, applying a downward elastic force to the support arm 16 so that the pressure roller 17 always maintains a pressure of 0.5-1mm with the fabric surface, ensuring that the fabric is taut and flat.

[0037] Please see Figure 1-4 The line drawing component includes a mounting base 22 embedded in the front end of the lifting platform 21, and an M12 threaded interface is provided at the bottom of the mounting base 22; the top of the line drawing pen 23 is provided with an external thread that matches the threaded interface, and can be quickly disassembled and assembled by rotation, making it easy to replace the pen refills of different colors or thicknesses.

[0038] Working principle: When marking lines on the airbag fabric, firstly, the roller shafts at both ends of the unwinding roller 13, which is wound with the fabric to be processed, are inserted into the U-shaped slots on the upper inner side of the unwinding frame 9 and fixed with locking bolts, allowing the unwinding roller 13 to rotate freely around its own axis. An empty take-up roller 14 is installed in the same manner on the take-up frame 10 in front of the marking table 11. Then, the front end of the fabric is led out from the unwinding roller 13, horizontally stretched, and passed through the surface of the marking table 11. After passing the bottom of the pressure roller 17 on the lower inner side of the front take-up frame 10, it is fixed to the roller surface of the take-up roller 14 by clamps or adhesive. At this time, under the elastic force of the torsion springs, the support arms 16 on the lower inner side of the unwinding frame 9 and the take-up frame 10 drive the pressure roller 17 downward to press the fabric tightly against the surface of the marking table 11. The continuous elastic pressure provided by the torsion spring effectively eliminates fabric slack or wrinkles, ensuring the fabric remains flat and taut during the marking process. The first motor 6 on both sides of the rear wall of the base 1, the second motor 3 on the outer wall of the sliding seat 2, and the third motor 18 on the top of the movable frame 7 are all electrically connected to the same controller. The operator inputs the preset marking trajectory parameters through the controller, and the controller synchronously sends control signals to the three stepper motors. When the marking program is started, the first motor 6 starts to rotate, driving the first lead screw 12 to rotate through the elastic coupling. The sliding seat 2, which is threaded with the lead screw, moves horizontally back and forth along the linear guide rail on the top of the base 1 under the guidance of the first guide rod 8. At the same time, the second motor 3 drives the second lead screw 4 to rotate, causing the movable frame 7 to move on the second guide rod 5. The horizontal movement perpendicular to the X-axis enables two-dimensional position adjustment of the marking execution component in the horizontal plane. The third motor 18 on the front of the movable frame 7 operates synchronously, driving the third lead screw 19 to rotate via the bottom output shaft. The lifting platform 21, cooperating with the lead screw, moves vertically up and down along the third guide rod 20 to adjust the contact pressure between the marking pen 23 and the fabric surface. When marking is needed, the lifting platform 21 descends, causing the pen tip 23 to contact the fabric. When marking is finished or when movement is needed, the lifting platform 21 rises, disengaging the pen tip from the fabric to prevent dragging and contamination. The three motors, through coordinated control by the controller, achieve three-axis linkage between the sliding seat 2, the movable frame 7, and the lifting platform 21, enabling the marking pen 23, mounted at the front of the lifting platform 21, to precisely move along a preset trajectory on the fabric surface. During the marking process, the take-up roller 14 rotates clockwise at a constant linear speed under the control of the take-up motor 15, while the unwind roller 13 rotates counterclockwise under the traction force of the fabric. Together, they achieve a uniform feed of the fabric from the unwinding frame 9 to the take-up frame 10. Since the pressure roller 17 is always in contact with the fabric through a torsion spring, the fabric maintains constant tension during feeding, preventing marking deviations caused by fabric movement or stretching deformation. After the marking pen 23 completes marking in a certain area with the three-axis mechanism, the take-up roller 14 continues to rotate, pulling the fabric forward until the next area to be marked is moved above the marking table 11. This marking action is repeated until the entire roll of fabric is processed. After the operation is completed, the controller returns the three motors to their initial positions and cuts off the power, loosening the locking bolts on the take-up frame 10.Remove the take-up roller 14 with the marking fabric wrapped around it for subsequent processes. If it is necessary to replace the marking pen 23 or adjust the pen tip type, simply rotate the marking pen 23 counterclockwise to separate its top external thread from the threaded interface at the bottom of the mounting base 22 for quick disassembly and assembly. When wear on the rubber surface of the pressure roller 17 is found to reduce the pressing effect, maintenance can be performed by replacing the torsion spring on the support arm 16 or disassembling the pressure roller 17 to ensure that the device maintains stable marking accuracy over a long period of time.

[0039] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. A marking device for airbag fabric, characterized in that, Includes a base (1), a sliding seat (2), a movable frame (7), an unwinding frame (9), a rewinding frame (10), and a marking execution assembly; The base (1) has symmetrical mounting grooves with linear guide rails on both sides of its top. A sliding seat (2) is slidably installed in the mounting groove. Two sets of sliding seats (2) are arranged with second guide rods (5) parallel to each other on their inner sides. A movable frame (7) is slidably installed on the second guide rods (5). A third guide rod (20) is symmetrically arranged on both sides of the front inner side of the movable frame (7). A lifting platform (21) is slidably installed on the third guide rod (20). A marking table (11) is fixedly installed at the center of the top of the base (1). A unwinding frame (9) is symmetrically fixedly installed at the top of the base (1) and at both ends behind the marking table (11). An unwinding roller (13) is detachably installed on the upper inner side of the unwinding frame (9). A winding frame (10) is symmetrically fixedly installed at the top of the base (1) and at both ends in front of the marking table (11). A winding roller (14) is detachably installed on the upper inner side of the winding frame (10). A winding motor (15) is fixedly installed on one side of the outer wall of the winding frame (10). The output shaft of the winding motor (15) is connected to the winding frame (10) via a coupling. Both the unwinding frame (9) and the winding frame (10) have support arms (16) mounted on their inner sides via a rotating shaft. The other end of the support arm (16) is mounted with a pressure roller (17) via a rotating shaft. The two sets of pressure rollers (17) press against the fabric surfaces on the front and rear sides of the top of the marking table (11).

2. The airbag fabric marking device according to claim 1, characterized in that, The base (1) has a first guide rod (8) symmetrically arranged on both sides of the top. The first guide rod (8) passes through the sliding seat (2) and slides with the sliding seat (2). A first lead screw (12) is arranged below the first guide rod (8). The first lead screw (12) passes through the lead screw hole inside the sliding seat (2) and is threaded with the lead screw hole. A first motor (6) is symmetrically fixedly installed on both sides of the rear wall of the base (1). The output shaft of the first motor (6) is connected to the first lead screw (12) through a coupling and is used to drive the sliding seat (2) to move horizontally along the first guide rod (8).

3. The airbag fabric marking device according to claim 2, characterized in that, The two sets of sliding seats (2) are rotatably mounted with a second lead screw (4) in the center of the inner side. The second lead screw (4) passes through the lead screw hole inside the movable frame (7) and is threaded into the lead screw hole. A second motor (3) is fixedly installed on the outer wall of one side of the sliding seat (2). The output shaft of the second motor (3) is connected to the second lead screw (4) through a coupling and is used to drive the movable frame (7) to move horizontally along the second guide rod (5).

4. The airbag fabric marking device according to claim 3, characterized in that, The movable frame (7) has a third lead screw (19) vertically rotatably mounted inside the front side. The third lead screw (19) passes through a pre-set lead screw hole inside the lifting platform (21) and is threaded into the lead screw hole. The movable frame (7) has a third motor (18) fixedly mounted on the top. The bottom output shaft of the third motor (18) is connected to the third lead screw (19) through a coupling and is used to drive the lifting platform (21) to rise and fall vertically along the third guide rod (20).

5. The airbag fabric marking device according to claim 1, characterized in that, The unwinding roller (13) and the winding roller (14) are both detachable. The unwinding frame (9) and the winding frame (10) are both provided with U-shaped slots on the upper inner side. The two ends of the roller shafts of the unwinding roller (13) and the winding roller (14) are engaged in the U-shaped slots, and the ends of the roller shafts are fixed to the unwinding frame (9) and the winding frame (10) by locking bolts.

6. The airbag fabric marking device according to claim 1, characterized in that, The support arm (16) is provided with a torsion spring at the pivot connection between the unwinding frame (9) and the winding frame (10). The torsion spring is used to apply a downward elastic force to the support arm (16) so that the pressure roller (17) always keeps in contact with the surface of the fabric.

7. The airbag fabric marking device according to claim 1, characterized in that, The line drawing execution component includes a mounting base (22) embedded in the front end of the lifting platform (21) and a line drawing pen (23) that can be detachably installed at the bottom of the mounting base (22). The bottom of the mounting base (22) is provided with a threaded interface, and the top of the line drawing pen (23) is provided with an external thread that matches the threaded interface, so as to realize the detachable installation of the line drawing pen (23).

8. The airbag fabric marking device according to claim 4, characterized in that, The first motor (6), the second motor (3) and the third motor (18) are all stepper motors, and their control circuits are connected in parallel to the same controller. The controller is used to synchronously control the start, stop and speed of the three motors to realize the coordinated movement of the sliding seat (2), the movable frame (7) and the lifting platform (21).

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