Plastic woven bag making machine

Abstract

The utility model relates to the technical field of bag making machines, in particular to a plastic woven bag making machine which comprises a bag making machine body stand, a cutting assembly used for cutting woven bags is arranged at the other end of the bag making machine body stand, and a plurality of limiting assemblies are fixedly installed on the upper surface of a conveying assembly. A height-adjustable pressing device is arranged on the upper portion of the middle of the conveying assembly and comprises a guide column, a motor mounting plate is slidably mounted on the outer side of the guide column, sliding block linear bearings are fixedly mounted at the upper end and the lower end of one side of the motor mounting plate, and the guide column is slidably mounted in the sliding block linear bearings. A vertical mounted bearing is mounted at the lower end of the other side of the motor mounting plate through bolts, a servo motor is mounted at the upper end of the outer side of the motor mounting plate through bolts, and a transmission shaft and a second belt pulley are rotationally mounted. According to the utility model, the plurality of groups of guide pillars are symmetrically arranged on the two sides of the mounting seat, so that the stress is further dispersed, the pressing force of the wire drawing roller on a woven bag is uniformly distributed, and the local slipping and wrinkling risks are reduced.

Description

Technical Field

[0001] This utility model relates to the field of bag making machine technology, and in particular to a plastic woven bag making machine. Background Technology

[0002] A plastic woven bag making machine is a device used to make plastic bags. The plastic used is not a pure substance; it is made up of many materials. Among them, high molecular polymers or synthetic resins are the main components of plastics. In order to improve the performance of plastics, various auxiliary materials, such as fillers, plasticizers, lubricants, stabilizers, and colorants, are added to the polymers to make plastics with good performance.

[0003] For example, an environmentally friendly plastic woven bag cutting device with application number CN202222384009.X involves pulling a woven bag from a woven bag roll, passing it through the bottom of a transmission device, placing the head at a sensor controller, and then controlling the device to start working. Rollers press the woven bag to rotate, moving the woven bag forward along the mounting platform surface. After the woven bag reaches a threshold distance from the sensor controller, the sensor controller controls the drive motor to stop working, and the woven bag stops moving forward. Then, the control cylinder moves the crossbar down, so that the woven bag is cut. Then, the control motor continues to work, pushing the woven bag forward, thus realizing the automated cutting of the woven bag.

[0004] However, the above-mentioned clamping device adopts a single spring floating structure, which achieves clamping only through the linear sliding of the first clamping block and the second clamping block. It lacks a guide mechanism such as a guide rail or slider, which can easily lead to uneven distribution of clamping force, resulting in local slippage or wrinkles in the woven bag. Utility Model Content

[0005] This utility model addresses the shortcomings of existing technologies by providing the following technical solution:

[0006] A plastic woven bag making machine includes a main frame, which includes a mounting base. One end of the main frame is equipped with a woven bag roll assembly for extracting woven bags. A conveying assembly for conveying woven bags is fixedly mounted on the upper part of the main frame. The other end of the main frame is equipped with a cutting assembly for cutting woven bags. Several sets of limiting components are fixedly mounted on the upper surface of the conveying assembly. An adjustable-height clamping device is located in the upper middle part of the conveying assembly. The clamping device includes guide columns, a motor mounting plate, a support plate, a right-hand screw, a servo motor, and a drawing roller. Several sets of guide columns are symmetrically fixed on both sides of the upper surface of the mounting base. The motor mounting plate is slidably mounted on the outside of the guide columns. One side of the motor mounting plate has two... A slider linear bearing is fixedly installed at one end, and the guide post is slidably installed inside the slider linear bearing. A vertical bearing with a seat is bolted to the lower end of the other side of the motor mounting plate. A nut fixing seat is fixedly installed in the middle of the inner side of the motor mounting plate, and a lead screw nut is fixedly installed in the middle of the nut fixing seat. The right-hand screw thread is installed inside the lead screw nut, and a back wave handwheel is provided at the top of the right-hand screw. The support plate is fixedly installed at the top of the two sets of motor mounting plates. The servo motor is bolted to the upper end of the outer side of the motor mounting plate. A first pulley is provided at the rotating end of the servo motor, and a belt is rotatably installed on the outside of the first pulley. A second pulley is provided at the other end of the belt. A drive shaft is provided in the middle of the drawing roller, and the drive shaft is rotatably installed with the second pulley.

[0007] As an improvement to the above technical solution, the conveying assembly includes a conveying frame, and the limiting assembly includes an adjusting seat and a rubber-coated pressure roller. Several sets of adjusting seat bolts are installed on both sides of the conveying frame. The two ends of the rubber-coated pressure roller are fixedly installed with screw tops and hexagonal bolts at the top of the adjusting seat, and springs are sleeved on the bottom of the hexagonal bolts.

[0008] As an improvement to the above technical solution, the upper and lower parts of the right-hand screw are provided with bearing flanges. The upper bearing flange is fixedly installed on the upper surface of the support plate, and the lower bearing flange is bolted to the upper surface of the mounting base.

[0009] As an improvement to the above technical solution, the two sets of servo motors are mirror-mounted on the outside of the motor mounting plate.

[0010] As an improvement to the above technical solution, each set of limiting components has two rubber-coated pressure rollers, and both sets of drawing rollers are arranged between the rubber-coated pressure rollers.

[0011] The beneficial effects of this utility model are:

[0012] 1. This utility model's conveying assembly uses a motor-driven belt to move the woven bag forward. A limiting assembly restricts the lateral displacement of the woven bag, maintaining its linear conveyance. A servo motor drives the transmission shaft of the drawing roller via a first pulley, a belt, and a second pulley, applying pressure to the woven bag to prevent slippage. When the woven bag reaches a set length, the cutting assembly automatically starts and completes the cutting. After cutting, the conveying assembly continues to operate, pushing the next section of woven bag into the cutting area, achieving continuous production. Through the cooperation of the guide column and the linear bearing of the slider, the movement trajectory of the motor mounting plate is strictly limited to a straight line, avoiding the offset issues common in traditional single-spring floating structures. To address uneven clamping force, several sets of guide pillars are symmetrically installed on both sides of the mounting base to further distribute the force, ensuring uniform clamping force distribution of the drawing roller on the woven bag, reducing the risk of local slippage and wrinkles. The rotating back wave handwheel drives the right-hand screw to rotate, and the screw nut enables precise lifting and lowering of the motor mounting plate. The adjustment range is large and the precision is high, which can adapt to the processing needs of woven bags of different thicknesses. The clamping device is linked with the conveying and cutting components to realize automatic clamping, conveying and cutting of woven bags, reducing manual intervention, improving production efficiency, and uniform clamping force to prevent wrinkles, displacement or breakage of woven bags during the cutting process, reducing the defect rate and improving product quality and market competitiveness. Attached Figure Description

[0013] Figure 1 This is a structural diagram of the present invention;

[0014] Figure 2 This is a structural diagram of the main frame of the bag-making machine of this utility model;

[0015] Figure 3 This is a structural diagram of the limiting component of this utility model;

[0016] Figure 4 This is a structural diagram of the clamping device of this utility model;

[0017] Figure 5 This is a structural diagram of the clamping device of this utility model.

[0018] Reference numerals: 1. Main frame of bag making machine; 11. Mounting seat; 2. Conveying assembly; 21. Conveying frame; 3. Limiting assembly; 31. Adjusting seat; 32. Glue-coating pressure roller; 321. Screw top; 322. Hex bolt; 323. Spring; 4. Pressing device; 41. Guide column; 42. Motor mounting plate; 421. Sliding linear bearing; 422. Vertical bearing with seat; 423. Nut fixing seat; 424. Lead screw nut; 43. Support plate; 44. Right-hand lead screw; 441. Back wave handwheel; 442. Bearing flange; 45. Servo motor; 451. First pulley; 452. Belt; 453. Second pulley; 46. Drawing roller; 461. Drive shaft; 5. Woven bag roll assembly; 6. Cutting assembly. Detailed Implementation

[0019] To make the objectives, technical solutions, and advantages of this utility model clearer, the following provides a more detailed description of the utility model. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of the utility model.

[0020] Please see Figure 1-5 This utility model provides a technical solution:

[0021] A plastic woven bag making machine includes a main frame 1, which includes a mounting base 11. One end of the main frame 1 is equipped with a woven bag roll assembly 5 for extracting woven bags. A conveying assembly 2 for conveying woven bags is fixedly installed on the upper part of the main frame 1. The other end of the main frame 1 is equipped with a cutting assembly 6 for cutting woven bags. Several sets of limiting assemblies 3 are fixedly installed on the upper surface of the conveying assembly 2. An adjustable-height pressing device 4 is provided in the upper middle part of the conveying assembly 2. The pressing device 4 includes guide posts 41, a motor mounting plate 42, a support plate 43, a right-hand screw 44, a servo motor 45, and a drawing roller 46. Several sets of guide posts 41 are symmetrically fixedly installed on both sides of the upper surface of the mounting base 11. The motor mounting plate 42 is slidably installed on the outside of the guide posts 41. Sliding linear bearings 4 are fixedly installed at the upper and lower ends of one side of the motor mounting plate 42. 21. The guide post 41 is slidably installed inside the linear bearing 421 of the slider. A vertical bearing 422 with a seat is bolted to the lower end of the other side of the motor mounting plate 42. A nut fixing seat 423 is fixedly installed in the middle of the inner side of the motor mounting plate 42. A lead screw nut 424 is fixedly installed in the middle of the nut fixing seat 423. A right-hand screw 44 is threaded inside the lead screw nut 424. A back wave handwheel 441 is provided at the top of the right-hand screw 44. A support plate 43 is fixedly installed at the top of the two sets of motor mounting plates 42. A servo motor 45 is bolted to the upper end of the outer side of the motor mounting plate 42. A first pulley 451 is provided at the rotating end of the servo motor 45. A belt 452 is rotatably installed on the outside of the first pulley 451. A second pulley 453 is provided at the other end of the belt 452. A drive shaft 461 is provided in the middle of the wire drawing roller 46. The drive shaft 461 and the second pulley 453 are rotatably installed.

[0022] In this implementation, the back-wave handwheel 441 of the manual adjustment clamping device 4 is rotated to drive the right-hand screw 44 to rotate. The screw nut 424 drives the motor mounting plate 42 to slide up and down along the guide post 41, adjusting the distance between the drawing roller 46 and the conveying assembly 2 to match the thickness of the woven bag, ensuring uniform clamping force without damaging the material. The woven bag roll is then installed on the woven bag roll assembly 5 at one end of the frame 1, and its position is adjusted to align with the conveying assembly 2 to prevent the woven bag from shifting. The head of the woven bag is then manually pulled out and passed through the conveying assembly 2. The limiting component 3 is placed below the pressing device 4. The woven bag is placed between the drawing roller 46 and the conveying component 2, ensuring that the edge of the woven bag is aligned with the limiting component 3 to prevent deviation. The conveying component 2 is started, and the belt on the conveying component 2 is driven by the motor to move the woven bag forward. The limiting component 3 restricts the lateral displacement of the woven bag to keep it conveyed in a straight line. The servo motor 45 drives the drive shaft 461 of the drawing roller 46 to rotate through the first pulley 451, the belt 452 and the second pulley 453, applying a pressing force to the woven bag to prevent slippage. When the woven bag moves to the set length, the cutting component 6 automatically starts and completes the cutting. After cutting, the conveying component 2 continues to run, pushing the next section of woven bag into the cutting area, realizing continuous production. Through the cooperation of the guide column 41 and the linear bearing 421 of the slider, the movement trajectory of the motor mounting plate 42 is strictly limited to a straight line, avoiding the uneven clamping force caused by offset in the traditional single-spring floating structure. Several sets of guide columns 41 are symmetrically installed on both sides of the mounting base 11 to further distribute the force and ensure that the clamping force of the drawing roller 46 on the woven bag is evenly distributed, reducing... To minimize the risk of localized slippage and wrinkles, the rotating back-wave handwheel 441 drives the right-hand screw 44 to rotate, and the screw nut 424 enables precise lifting and lowering of the motor mounting plate 42. The adjustment range is large and the precision is high, which can adapt to the processing needs of woven bags of different thicknesses. The pressing device 4 is linked with the conveying component 2 and the cutting component 6 to realize the automatic pressing, conveying and cutting of woven bags, reducing manual intervention, improving production efficiency, and uniform pressing force to prevent wrinkles, displacement or breakage of woven bags during the cutting process, reducing the defect rate and improving product quality and market competitiveness.

[0023] Specifically, the conveying component 2 includes a conveying frame 21, and the limiting component 3 includes an adjusting seat 31 and a rubber-coated pressure roller 32. Several sets of adjusting seats 31 are bolted to both sides of the conveying frame 21. The two ends of the rubber-coated pressure roller 32 are fixedly installed with screw tops 321 and hexagonal bolts 322 at the top of the adjusting seats 31. A spring 323 is sleeved on the bottom of the hexagonal bolts 322.

[0024] In this embodiment, the conveyor frame 21 serves as the main frame of the conveyor assembly 2, providing a stable support platform for the conveying of woven bags and ensuring the linear movement trajectory of the woven bags during the conveying process. Power is transmitted to the woven bags via the conveyor belt, driving them to move along the conveyor frame 21. The adjusting seat 31 is fixed to both sides of the conveyor frame 21 with bolts, facilitating adjustment of its position according to the width of the woven bags and achieving lateral positioning. The two ends of the rubber-coated pressure roller 32 are connected to the top of the adjusting seat 31 via screw nut 321 and hexagonal bolts 322 for stable installation. The spring 323 fitted at the bottom of the hexagonal bolt 322 provides elastic cushioning when the woven bags pass by, preventing the rubber-coated pressure roller 32 from applying excessive rigid pressure to the woven bags and preventing deformation or damage. The symmetrically installed adjusting seats 31 on both sides of the conveyor 21 apply uniform pressure from both sides of the woven bag, preventing lateral displacement during conveying and ensuring accurate cutting. The elastic properties of the spring 323 allow the rubber-coated pressure roller 32 to automatically adjust the clamping force according to the thickness and tension of the woven bag. When the thickness of the woven bag changes or the conveying speed fluctuates, the spring 323 absorbs excess force by compression or extension, maintaining stable clamping force and preventing slippage or wrinkling of the woven bag. The rubber coating of the rubber-coated pressure roller 32 increases friction with the woven bag while reducing wear on the bag surface, extending the service life of the woven bag, and ensuring finished product quality. The adjusting seats 31 and the rubber-coated pressure roller 32 are bolted together for easy disassembly and replacement. When the rubber-coated pressure roller 32 wears or the spring 323 fails, the parts can be quickly replaced, reducing downtime.

[0025] Specifically, the upper and lower parts of the right-hand screw 44 are provided with bearing flanges 442. The upper bearing flange 442 is fixedly installed on the upper surface of the support plate 43, and the lower bearing flange 442 is bolted to the upper surface of the mounting base 11.

[0026] In this embodiment, the right-hand lead screw 44 is rigidly connected to the support plate 43 via the upper bearing flange 442 and the mounting base 11 via the lower bearing flange 442, forming a stable double-end support structure. This effectively restricts the axial and radial degrees of freedom of the lead screw, avoids vibration or sway caused by the cantilever structure, and ensures the coaxiality and straightness of the lead screw during rotation. The precise installation of the upper and lower flanges ensures the meshing accuracy of the right-hand lead screw 44 and the lead screw nut 424, reduces transmission errors caused by fit clearance or eccentricity, and improves the adjustment accuracy of the clamping device 4. The upper and lower bearing flanges 442 are connected to the support plate 43 and the mounting base 11 via bolts, which facilitates disassembly and replacement. When the lead screw or bearing is worn, the flanges can be quickly disassembled for maintenance, reducing downtime.

[0027] Specifically, two sets of servo motors 45 are mirror-mounted on the outside of the motor mounting plate 42.

[0028] In this embodiment, two sets of servo motors 45 are symmetrically installed on the left and right sides of the motor mounting plate 42. By rotating in opposite directions at the same speed or driving synchronously in the same direction, dynamic torque balance can be achieved. When the wire drawing roller 46 needs to rotate at high speed, the torque of the two motors forms a closed-loop force system on the mounting plate 42, which significantly reduces the off-center vibration caused by unilateral drive and improves the stability of equipment operation.

[0029] Specifically, each set of limiting components 3 has two rubber-coated pressure rollers 32, and two sets of drawing rollers 46 are arranged between the rubber-coated pressure rollers 32.

[0030] In this embodiment, the rubber-coated pressure roller 32 of the limiting component 3 and the two sets of drawing rollers 46 form a sandwich distribution of "pressure roller-drawing roller-pressure roller". The upper rubber-coated pressure roller 32 and the lower rubber-coated pressure roller 32 apply bidirectional pressure to the woven bag through the elastic rubber coating layer. The rotational motion of the middle drawing roller 46 is converted into the axial tensile force of the woven bag, realizing the coupling transmission of "pressure-friction force-traction force", ensuring that the woven bag always maintains a stable envelope angle during the stretching process, and avoiding deviation or wrinkles.

[0031] The above embodiments are only used to illustrate the technical solution of this utility model, and are not intended to limit it.

Claims

1. A plastic woven bag making machine, comprising a main frame (1) of the bag making machine, the main frame (1) including a mounting base (11), a woven bag roll assembly (5) for pulling out woven bags being provided at one end of the main frame (1), a conveying assembly (2) for conveying woven bags being fixedly installed on the upper part of the main frame (1), and a cutting assembly (6) for cutting woven bags being provided at the other end of the main frame (1), characterized in that: Several sets of limiting components (3) are fixedly installed on the upper surface of the conveying assembly (2). An adjustable height clamping device (4) is provided in the upper middle part of the conveying assembly (2). The clamping device (4) includes guide posts (41), motor mounting plate (42), support plate (43), right-hand screw (44), servo motor (45), and wire drawing roller (46). Several sets of guide posts (41) are symmetrically fixedly installed on both sides of the upper surface of the mounting base (11). The motor mounting plate (42) is slidably installed on the outside of the guide posts (41). A slider linear bearing (421) is fixedly installed at the upper and lower ends of one side of the motor mounting plate (42). The guide posts (41) are slidably installed inside the slider linear bearing (421). A vertical bearing with a seat (422) is bolted to the lower end of the other side of the motor mounting plate (42). The inner side of the motor mounting plate (42) is... A nut fixing seat (423) is fixedly installed on the part of the nut fixing seat (423), and a lead screw nut (424) is fixedly installed in the middle of the nut fixing seat (423). The right-hand screw (44) is threaded inside the lead screw nut (424). A back wave handwheel (441) is provided at the top of the right-hand screw (44). The support plate (43) is fixedly installed at the top of two sets of motor mounting plates (42). The servo motor (45) is bolted to the upper end of the outer side of the motor mounting plate (42). A first pulley (451) is provided at the rotating end of the servo motor (45). A belt (452) is rotatably installed on the outside of the first pulley (451). A second pulley (453) is provided at the other end of the belt (452). A drive shaft (461) is provided in the middle of the wire drawing roller (46). The drive shaft (461) and the second pulley (453) are rotatably installed.

2. The plastic woven bag making machine according to claim 1, characterized in that: The conveying assembly (2) includes a conveying frame (21), and the limiting assembly (3) includes an adjusting seat (31) and a rubber-coated pressure roller (32). Several sets of adjusting seats (31) are bolted on both sides of the conveying frame (21). The two ends of the rubber-coated pressure roller (32) are fixedly installed with screw tops (321) and hexagonal bolts (322) at the top of the adjusting seat (31). A spring (323) is sleeved on the bottom of the hexagonal bolt (322).

3. The plastic woven bag making machine according to claim 1, characterized in that: The right-hand screw (44) is provided with bearing flanges (442) at both the upper and lower parts. The upper bearing flange (442) is fixedly installed on the upper surface of the support plate (43), and the lower bearing flange (442) is bolted to the upper surface of the mounting base (11).

4. A plastic woven bag making machine according to claim 1, characterized in that: The two sets of servo motors (45) are mounted mirror images on the outside of the motor mounting plate (42).

5. A plastic woven bag making machine according to claim 1, characterized in that: Each of the limiting components (3) has two rubber-coated pressure rollers (32), and the two sets of drawing rollers (46) are arranged between the rubber-coated pressure rollers (32).

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