Quick die changing positioning device for bag making machine

Abstract

This utility model discloses a quick mold-changing positioning device for a bag-making machine, relating to the technical field of bag-making equipment. It includes a stamping frame, a positioning seat, and a mold. The stamping frame has mounting holes on both sides, with side frames on either side of the mounting holes. The side frames have sliding grooves, and the sliders on both sides of the positioning seat are slidably installed in the grooves. The through holes on the positioning seat are aligned with the mounting holes. The screw of the mold passes through the mounting holes and the through holes and is fixed by a nut. A lead screw is provided on the outer wall of the side frames. A first bevel gear at one end of the lead screw meshes with second bevel gears at both ends of a rotating rod. The rotating rod is connected to the driving bevel gear on the output shaft of a servo motor via a driven bevel gear. This device drives the bevel gear set and lead screw via a servo motor, causing the positioning seat to move synchronously in the opposite direction. Combined with a distance sensor to monitor the distance in real time, it achieves rapid and accurate mold positioning, saving mold-changing time and adapting to molds of different sizes, thus improving the production efficiency and quality of the bag-making machine.

Description

Technical Field

[0001] This utility model relates to the field of bag making machine technology, and in particular to a quick mold changing and positioning device for a bag making machine. Background Technology

[0002] During the production process of the bag making machine, different specifications of molds need to be changed frequently according to different bag making needs.

[0003] Currently, the traditional method of changing and positioning molds for bag making machines mainly relies on manual operation. The specific process is as follows: the operator first disassembles the fixing parts of the old mold, then manually moves the new mold to the installation position, adjusts the position of the mold by visual observation and experience to align it with the stamping mechanism of the bag making machine, and finally fixes the mold with bolts and other connecting parts.

[0004] This manual positioning method has many drawbacks: on the one hand, the mold changing process is time-consuming, especially in production scenarios where different specifications of molds need to be changed frequently, which will seriously affect production efficiency, slow down the production pace, and increase the company's time costs; on the other hand, the accuracy of manual positioning depends entirely on the operator's experience and skills, making it difficult to guarantee the accuracy of mold positioning, which is prone to positioning errors, leading to a decline in bag quality, problems such as non-standard bag shape and size deviation, and increasing the scrap rate.

[0005] Meanwhile, traditional bag making machine mold changing positioning devices lack flexible adaptability. The spacing of their positioning components is usually fixed and can only adapt to molds of specific sizes. When it is necessary to change to molds of different sizes, it is often necessary to make cumbersome modifications or replacements to the positioning device. This not only makes the operation complicated but also further prolongs the mold changing time and reduces the versatility of the equipment.

[0006] Therefore, addressing the problems of low efficiency, large errors, and poor adaptability in existing mold-changing positioning methods for bag-making machines, developing a rapid mold-changing positioning device for bag-making machines that can achieve automated, rapid positioning, high accuracy, and strong adaptability has become a pressing technical problem for those skilled in the art. Utility Model Content

[0007] One objective of this invention is to provide a rapid mold changing and positioning device for a bag-making machine. This invention can achieve rapid and accurate mold positioning through an automated transmission structure driven by a servo motor, combined with real-time monitoring by a distance sensor. This replaces the traditional manual adjustment method, significantly shortening the mold changing time. At the same time, thanks to the reverse thread design of the lead screw and the adaptable structure, it is compatible with molds of different specifications, effectively solving the problems of low efficiency, large error, and poor adaptability in traditional mold changing and positioning, thereby improving the production efficiency and product quality of the bag-making machine.

[0008] A quick mold changing and positioning device for a bag making machine according to an embodiment of the present invention includes a stamping frame, a positioning seat, and a mold. The stamping frame has symmetrically arranged mounting holes on both sides. Side frames are fixedly installed on both sides of the mounting holes and at the top of the stamping frame. Slide grooves are formed inside the side frames. Slider blocks are fixedly installed on the outer walls of both sides of the positioning seat, and the sliders are slidably installed in the slide grooves. A through hole is vertically and centrally located inside the positioning seat, and the through hole is aligned with the mounting holes. Screws are symmetrically arranged on both sides of the top of the mold, passing through the mounting holes and the through hole. Nuts are screwed onto the top of the screws. Lead screws are provided on the outer walls of both sides of the side frames, and a first bevel gear is installed at one end of each lead screw. A rotating rod is movably installed on one side of the top of the stamping frame via a bracket, and second bevel gears are fixedly installed at both ends of the rotating rod.

[0009] Furthermore, the second bevel gear meshes with the first bevel gear, a driven bevel gear is centrally mounted on the outer wall of the rotating rod, a servo motor is fixedly mounted on the outer side of the lead screw and at the top of the stamping frame, and a driving bevel gear is mounted on the output shaft of the servo motor, the driving bevel gear meshing with the driven bevel gear.

[0010] Furthermore, a threaded hole is provided inside the slider, and the lead screw passes through the threaded hole to form a transmission pair, and the threads on the outer walls of the two sides of the lead screw are opposite.

[0011] Furthermore, a mounting base is fixedly installed at the center of the top of the stamping frame, and the mounting base has mounting holes.

[0012] Furthermore, both sets of positioning seat sidewall sliders are equipped with distance measuring sensors, and the two sets of distance measuring sensors are arranged facing each other.

[0013] Furthermore, an anti-loosening washer is provided between the nut and the positioning seat, and the anti-loosening washer is a spring washer and is sleeved on the outside of the screw.

[0014] Furthermore, the two ends of the lead screw are rotatably connected to the side frame via deep groove ball bearings, and the inner ring of the bearing is interference-fitted with the lead screw, while the outer ring is fixedly connected to the inner wall of the side frame.

[0015] Furthermore, the servo motor is fixed to the top of the stamping frame via a motor mount, and the motor mount and the stamping frame are detachably connected by bolts.

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

[0017] In this invention, a servo motor drives a bevel gear set and a lead screw transmission to move the positioning seat synchronously in the opposite direction, replacing the traditional manual positioning method. During operation, the motor power is precisely transmitted to the lead screw through multi-stage gear meshing, allowing the positioning seat to slide smoothly along the slide groove. With the help of a distance measuring sensor to monitor the distance in real time, mold positioning can be completed in a short time, saving more time than the traditional mold changing method. It solves the problems of low efficiency and large error of manual positioning. In addition, the reverse thread design on both sides of the lead screw allows the positioning seat to flexibly adjust the spacing according to the mold specifications. With the alignment structure of the through hole and the mounting hole, it can adapt to molds of different sizes. Attached Figure Description

[0018] 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:

[0019] Figure 1 This is a schematic diagram of the overall structure of a quick mold changing and positioning device for a bag making machine proposed in this utility model;

[0020] Figure 2 This is a schematic diagram of the bottom structure of a quick mold changing and positioning device for a bag making machine proposed in this utility model;

[0021] Figure 3 This is a schematic diagram of the mold disassembly structure of a quick mold changing and positioning device for a bag making machine proposed in this utility model;

[0022] Figure 4 This is a schematic diagram of the positioning seat structure of a quick mold changing positioning device for a bag making machine proposed in this utility model;

[0023] Figure 5 This is a partially enlarged structural diagram of a quick mold changing and positioning device for a bag making machine proposed in this utility model.

[0024] In the diagram: 1. Stamping frame; 2. Mounting hole; 3. Side frame; 4. Slide groove; 5. Positioning seat; 6. Lead screw; 7. Servo motor; 8. Mounting seat; 9. Mold; 10. Screw; 11. Through hole; 12. Nut; 13. Slider; 14. Screw hole; 15. Distance sensor; 16. Rotating rod; 17. First bevel gear; 18. Second bevel gear; 19. Driven bevel gear; 20. Driving bevel gear. Detailed Implementation

[0025] To make the technical means and objectives and effects of this utility model easier to understand, the embodiments of this utility model will be described in detail below with reference to specific figures.

[0026] It should be noted that all directional and positional terms used in this utility model, such as "up," "down," "left," "right," "front," "back," "vertical," "horizontal," "inner," "outer," "top," "lower," "lateral," "longitudinal," and "center," are only used to explain the relative positional relationships and connections between components in a specific state (as shown in the accompanying drawings). They are merely for the convenience of describing this utility model and do not require that this utility model be constructed and operated in a specific orientation; therefore, they should not be construed as limitations on this utility model. Furthermore, descriptions involving "first," "second," etc., in this utility model are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated.

[0027] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0028] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the present invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0029] like Figure 1-5As shown, this utility model discloses a quick mold changing and positioning device for a bag making machine, including a stamping frame 1, a positioning seat 5, and a mold 9. The stamping frame 1 has symmetrical mounting holes 2 on both sides inside. Side frames 3 are fixedly installed on both sides of the mounting holes 2 and at the top of the stamping frame 1. The side frames 3 have sliding grooves 4 inside. The positioning seat 5 has sliders 13 fixedly installed on both sides of the outer wall. The sliders 13 are slidably installed in the sliding grooves 4. The positioning seat 5 has a through hole 11 vertically penetrating through the center, and the through hole 11 is aligned with the mounting hole 2. The mold 9 has screws 10 symmetrically arranged on both sides of the top. The screws 10 pass through the mounting holes 2 and the through holes 11. Nuts 12 are screwed onto the top of the screws 10. The side frames 3 have lead screws 6 on both sides of the outer wall. A first bevel gear 17 is installed at one end of the lead screw 6. A rotating rod 16 is movably installed on one side of the top of the stamping frame 1 through a bracket. A second bevel gear 18 is fixedly installed at both ends of the rotating rod 16.

[0030] This application discloses a quick mold changing and positioning device for a bag-making machine. When changing the mold, firstly, the nut 12 of the old mold is unscrewed from the screw 10, and then the screw 10 of the old mold is pulled out from the mounting hole 2 and through hole 11, completing the disassembly of the old mold. Next, the screw 10 of the new mold is aligned with the mounting hole 2 and through hole 11 and inserted, and then the nut 12 is screwed onto the screw 10 for initial fixation. The servo motor 7 is started, and the output shaft of the servo motor 7 drives the active bevel gear 20 to rotate. Since the active bevel gear 20 meshes with the driven bevel gear 19, it drives the rotating rod 16 to rotate. The second bevel gears 18 at both ends of the rotating rod 16 rotate accordingly. Since the second bevel gear 18 meshes with the first bevel gear 17, it drives the lead screw 6 to rotate. The lead screw 6 and the screw hole 14 in the slider 13 form a transmission pair, and the threads on the outer walls of the two sides of the lead screw 6 are opposite. Therefore, the slider 13 drives the positioning seat 5 to move relative to or towards each other in the slide groove 4, realizing the positioning adjustment of the mold 9. The distance sensor 15 on the positioning seat 5 can monitor the distance between the two positioning seats 5 in real time to ensure accurate positioning. After positioning is completed, tighten the nut 12 to complete the installation and positioning of the new mold.

[0031] The quick mold changing and positioning device for bag making machines described in this application uses a servo motor 7 to drive the lead screw 6 to rotate, thereby moving the positioning seat 5. Combined with the precise monitoring of the distance sensor 15, it can quickly and accurately complete mold changing and positioning, greatly shortening mold changing time and improving production efficiency. At the same time, the ingenious cooperation between the various components ensures the stability and reliability of mold positioning, which is beneficial to improving the production quality of the bag making machine.

[0032] As a preferred example of this application, the second bevel gear 18 meshes with the first bevel gear 17, a driven bevel gear 19 is centrally mounted on the outer wall of the rotating rod 16, and a servo motor 7 is fixedly mounted on the outer side of the lead screw 6 and at the top of the stamping frame 1. A driving bevel gear 20 is mounted on the output shaft of the servo motor 7, and the driving bevel gear 20 meshes with the driven bevel gear 19. Through this gear transmission structure, the power of the servo motor 7 can be stably and efficiently transmitted to the lead screw 6, ensuring the synchronicity and accuracy of the lead screw 6's rotation, thereby ensuring the movement accuracy of the positioning seat 5.

[0033] As a preferred example of this application, a threaded hole 14 is provided through the slider 13, and the lead screw 6 passes through the threaded hole 14 to form a transmission pair, and the threads on the outer walls of the two sides of the lead screw 6 are opposite. The design of the opposite threads on the two sides of the lead screw 6 allows the sliders 13 on both sides to drive the positioning seats 5 to move relative to or towards each other when the lead screw 6 rotates, which facilitates the positioning of molds of different specifications and improves the versatility of the device.

[0034] As a preferred example of this application, a mounting base 8 is fixedly installed at the center of the top of the stamping frame 1, and the mounting base 8 has mounting holes. The mounting base 8 facilitates the connection and fixation of the device with other parts of the bag making machine, enhancing the overall stability of the device.

[0035] As a preferred example of this application, a distance sensor 15 is installed on the sidewall slider 13 of both sets of positioning seats 5, and the two sets of distance sensors 15 are arranged facing each other. The distance sensor 15 can monitor the distance between the two positioning seats 5 in real time and feed the monitoring data back to the external control system, so that the control system can accurately control the servo motor 7, thereby realizing the precise positioning of the mold.

[0036] As a preferred example of this application, an anti-loosening washer is provided between the nut 12 and the positioning seat 5, and the anti-loosening washer is a spring washer and sleeved on the outside of the screw 10. The anti-loosening washer can effectively prevent the nut 12 from loosening due to vibration during the operation of the device, ensuring the firmness of the mold fixation and improving the working reliability of the device.

[0037] As a preferred example of this application, the two ends of the lead screw 6 are rotatably connected to the side frame 3 via deep groove ball bearings, with the inner ring of the bearings interference-fitted with the lead screw 6 and the outer ring fixedly connected to the inner wall of the side frame 3. Deep groove ball bearings have good rotational accuracy and stability, which can reduce the frictional resistance when the lead screw 6 rotates, ensure the smoothness of the lead screw 6's rotation, and extend the service life of the device.

[0038] As a preferred example of this application, the servo motor 7 is fixed to the top of the stamping frame 1 by a motor mount, and the motor mount and the stamping frame 1 are detachably connected by bolts. This connection method facilitates the installation, disassembly, and maintenance of the servo motor 7, and allows for quick replacement when the servo motor 7 malfunctions, reducing the impact on production.

[0039] As a preferred example of this application, the inner wall of the slide groove 4 is provided with a wear-resistant coating, which is made of polytetrafluoroethylene (PTFE) material with a thickness of 0.1-0.3 mm. PTFE material has excellent wear resistance and lubricity, which can reduce friction and wear of the slider 13 when sliding in the slide groove 4, improve the smoothness of the slider 13's sliding, and extend the service life of the slide groove 4 and the slider 13.

[0040] As a preferred example of this application, the ranging sensor 15 is a laser ranging sensor with a detection accuracy of not less than 0.1 mm, and is electrically connected to an external control system via wires. The laser ranging sensor features high detection accuracy and fast response speed, providing reliable data support for precise mold positioning and ensuring positioning accuracy.

[0041] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A quick mold changing and positioning device for a bag making machine, characterized in that, The device includes a stamping frame (1), a positioning seat (5), and a mold (9). The stamping frame (1) has symmetrical mounting holes (2) on both sides inside. Side frames (3) are fixedly installed on both sides of the mounting holes (2) and at the top of the stamping frame (1). Slide grooves (4) are provided inside the side frames (3). Slider blocks (13) are fixedly installed on the outer walls of both sides of the positioning seat (5). The sliders (13) are slidably installed within the slide grooves (4). A through hole (11) is vertically and centrally located inside the positioning seat (5). Aligned with the mounting hole (2), the top of the mold (9) is symmetrically provided with screws (10), which pass through the mounting hole (2) and the through hole (11). A nut (12) is screwed on the top of the screw (10). The outer walls of the two sides of the side frame (3) are provided with lead screws (6). A first bevel gear (17) is installed at one end of the lead screw (6). A rotating rod (16) is movably installed on one side of the top of the stamping frame (1) through a bracket. A second bevel gear (18) is fixedly installed at both ends of the rotating rod (16).

2. The quick mold changing and positioning device for a bag making machine according to claim 1, characterized in that, The second bevel gear (18) meshes with the first bevel gear (17). A driven bevel gear (19) is installed in the center of the outer wall of the rotating rod (16). A servo motor (7) is fixedly installed on the outside of the lead screw (6) and on the top of the stamping frame (1). An active bevel gear (20) is installed on the output shaft of the servo motor (7). The active bevel gear (20) meshes with the driven bevel gear (19).

3. The quick mold changing and positioning device for a bag making machine according to claim 2, characterized in that, The slider (13) has a through-hole (14) inside, the lead screw (6) passes through the screw hole (14) and forms a transmission pair, and the threads on the outer walls of the two sides of the lead screw (6) are opposite.

4. The quick mold changing and positioning device for a bag making machine according to claim 1, characterized in that, The stamping frame (1) has a mounting base (8) fixedly installed at the center of its top, and the mounting base (8) has a mounting hole.

5. The quick mold changing and positioning device for a bag making machine according to claim 1, characterized in that, Both sets of positioning seats (5) have distance sensors (15) installed on their side wall sliders (13), and the two sets of distance sensors (15) are arranged opposite each other.

6. The quick mold changing and positioning device for a bag making machine according to claim 1, characterized in that, An anti-loosening washer is provided between the nut (12) and the positioning seat (5), and the anti-loosening washer is a spring washer and is sleeved on the outside of the screw (10).

7. The quick mold changing and positioning device for a bag making machine according to claim 1, characterized in that, The two ends of the lead screw (6) are rotatably connected to the side frame (3) through deep groove ball bearings, and the inner ring of the bearing is interference-fitted with the lead screw (6), while the outer ring is fixedly connected to the inner wall of the side frame (3).

8. The quick mold changing and positioning device for a bag making machine according to claim 2, characterized in that, The servo motor (7) is fixed to the top of the stamping frame (1) by a motor mount, and the motor mount and the stamping frame (1) are detachably connected by bolts.

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