A ton bag hem seaming machine and its working method

Abstract

This invention relates to the field of ton bag packaging technology, specifically to a ton bag folding and sewing machine and its working method. It addresses the shortcomings of existing tying and heat sealing methods in ton bag packaging. The invention includes a frame with a bag-clamping rod, a bag-clamping swing cylinder, a connecting rod and crank, a ton bag folding assembly, and a ton bag sewing assembly. A folding fork is extended by a folding linear slide, positioning the bag opening between the two levers of the fork. The folding swing cylinder drives the fork to rotate 270°, folding the bag opening. The bag-clamping swing cylinder then activates, driving the connecting rod and crank to open and close the two clamping rods, clamping the bag opening. The folding linear slide retracts the folding fork, pulling it out of the folded bag opening to complete the folding. After folding, the sewing machine moves along the bag-clamping rod to complete the sewing. This folding and sewing machine is used in the sealing process of a fully automatic ton bag packaging machine. The folding method is unique and practical, creating conditions for the sewing machine to proceed with sewing after folding.

Description

Technical Field

[0001] This invention relates to the field of ton bag packaging technology, specifically to a ton bag folding and sewing machine and its working method. Background Technology

[0002] Ton bags are flexible transport packaging containers, mainly used for packaging bags weighing from 750kg to 2000kg. They have advantages such as moisture resistance, sturdiness, safety, and convenient transportation, and are widely used for loading and unloading bulk bags and material handling, offering good loading and unloading efficiency. Therefore, ton bag packaging technology has developed rapidly in recent years. The equipment used to package ton bags is a ton bag packaging machine.

[0003] Currently used fully automatic ton bag packaging machines seal bags using either automatic tying machines or heat sealing machines. Automatic tying machines allow sand and dust to easily enter, while heat sealing machines require plastic film for the bag opening, making them unsuitable for composite woven bags and powdery materials. Currently, folded-edge sewing is a relatively mature and effective sealing structure for packaging bags, widely used in small bag fully automatic packaging machines. Because small bags are lightweight and compact, the packaging process allows for holding the bag while moving it, maintaining a straight top and consistent height, thus enabling folded-edge sewing. However, due to the weight and size of ton bags, maintaining a straight and consistent bag opening during packaging is difficult. Therefore, existing folded-edge sewing structures cannot be used in ton bag packaging machines. Therefore, there is an urgent need to find a folded-edge sewing method suitable for ton bag packaging.

[0004] Patent No. 202411085935.4 discloses a sealing machine for ton bag packaging, which includes a sealing machine frame. A control box is vertically slidably mounted on the sealing machine frame. Two clamping frames are provided on the side wall of the control box near the bottom. Each clamping frame has a sponge pad and a heating resistance layer on its opposite side wall. The sponge pad on each clamping frame is located below the heating resistance layer. The clamping frame facing away from the control box is fixedly mounted on the side wall of the control box, while the clamping frame facing the control box is hinged by a connecting rod. The air extraction component, which is located between two clamping frames on the control box and is attached to the side wall of the control box, is used to extract gas from the ton bag. A fixing clip is also installed on the control box above the two clamping frames. There is one fixing clip on each side of the air extraction component along the length of the control box. The two fixing clips slide relative to each other along the length of the control box. This structure improves the sealing effect of the ton bag. However, the sealing is done by heat sealing. The bag opening material must be plastic film. It is not suitable for composite woven bag openings or for packaging powdered materials.

[0005] Patent No. 202422563379.9 discloses a sealing device for ton bag packaging, including a support frame, a sealing assembly, and a conveying assembly. A support plate is installed inside the support frame, and support arms are installed on both sides of the support plate. In this invention, a sealing machine is installed on the surface of the mounting base, and symmetrical mounting plates are installed at one end of each support arm. Closing rollers are installed inside the mounting plates. When the ton bag is conveyed to the inside of the mounting plate, the bag opening contacts the closing rollers, which close the bag opening. The closing rollers then close the bag opening. As the bag moves past the sealing machine, the sealing machine seals the bag opening, achieving automatic sealing. This method is significantly more efficient than manual sealing and meets the needs of sealing bulk ton bags. However, this method is similar to existing edge-folding and sewing methods on the market, and is only suitable for small bag packaging. It is not suitable for ton bag packaging. From a structural perspective, it is difficult to straighten the ton bag opening before it passes through the sealing machine, making it unsuitable for use in ton bag packaging. Summary of the Invention

[0006] The purpose of this invention is to provide a ton bag folding and sewing machine and its working method to solve the problems mentioned in the background art.

[0007] To achieve the above objectives, the present invention provides the following technical solution: a ton bag folding and sewing machine, comprising a frame, a set of bag clamping rods symmetrically hinged to the front end of the frame, a connecting rod provided at the middle of the outer side of each bag clamping rod, the other end of the connecting rod being hinged to a crank, the crank being driven by a bag clamping swing cylinder to realize the opening and closing of a set of bag clamping rods, a ton bag folding assembly fixedly provided in the middle of the frame, and a ton bag sewing assembly fixedly provided on one side of the frame of the ton bag folding assembly;

[0008] The ton bag folding assembly includes a folding linear slide, on which a folding slide slider that can slide in a straight line is provided. A folding swing cylinder is provided on the folding slide slider, and a folding fork is connected to the folding swing cylinder. The folding fork consists of two parallel rods, one end of which is connected by a connecting rod. The swing cylinder is hinged to the connecting rod of the folding fork, so that the folding fork can reciprocate from 0° to 270°. After a set of bag clamping rods clamps the bag, it is located at the lower middle part of the two rods of the folding fork.

[0009] Furthermore, the ton bag sewing assembly includes a sewing linear slide. A slide servo motor is installed on one side of one end of the sewing linear slide. A sewing translation bracket is installed on the slider of the sewing linear slide. Two parallel linear guide rails are installed perpendicularly to one side of the sewing translation bracket. A linear slider is installed on each linear guide rail. The linear slider is located inside the sewing machine bracket. A sewing machine is fixed on the sewing machine bracket. A lifting cylinder is also installed on the sewing translation bracket. The piston rod of the lifting cylinder is connected to the sewing machine bracket through a fisheye joint, driving the sewing machine bracket to move up and down along the linear guide rails to realize the lifting and lowering of the sewing machine.

[0010] Furthermore, a sewing machine is connected to a sewing motor, which is connected to the sewing machine via pulleys and belts.

[0011] Furthermore, a folding connecting seat plate is fixed on the folding slide block, and the folding swing cylinder is fixed on the folding slide block through the folding connecting seat plate.

[0012] Furthermore, a sewing bag translation bracket is provided at one end with a sewing bag thread tower bracket, and a thread breakage detection component is provided in the middle.

[0013] Furthermore, the lifting cylinder is positioned between the two linear guide rails, and the sewing linear slide is positioned on the bottom plane of the frame.

[0014] Furthermore, the sewing machine motor is mounted on the sewing machine bracket via a motor mounting plate.

[0015] Furthermore, a motor adjustment bolt is installed between the sewing machine bracket and the motor mounting plate to adjust the belt tension.

[0016] Furthermore, a sewing belt cover is installed on the upper part of the sewing motor and the sewing machine.

[0017] The working method of a ton bag folding and sewing machine includes the following steps:

[0018] 1) The filled ton bags are moved to the sealing station by the bag-collecting rod of the packaging machine with the bag opening clamped. The folding fork is controlled to slide in a straight line on the folding linear slide. The folding fork extends so that the bag opening is between the two levers of the folding fork. At the same time as the bag-collecting rod is released, the folding swing cylinder drives the folding fork to rotate 270° to fold the bag opening.

[0019] 2) Start the bag clamping swing cylinder, drive the two bag clamping rods to clamp the bag opening after folding, drive the folding fork to retract, pull out the bag opening after folding to complete the folding, and after the folding fork retracts, drive the folding swing cylinder to rotate the folding fork 270° in the opposite direction to reset.

[0020] 3) The lifting cylinder drives the sewing machine to descend and seal the bag opening. After sealing, the bag clamping swing cylinder is activated to drive the two bag clamping rods to open. Once sealing is complete, the ton bag can be moved out of the sealing station.

[0021] Compared with the prior art, the advantages of the present invention are:

[0022] 1) In the folding process of this invention, the two rods of the folding fork are inserted into the middle of the bag opening. Then, the folding fork is rotated 270° to fold the upper edge of the bag opening to the lower part. After folding, the bag clamp holds the folded bag opening, and the folding fork is pulled out from the folded bag opening. Therefore, the bag opening left above the bag clamp will remain straight and at a consistent height, creating good conditions for sewing bags.

[0023] 2) The structure of this invention completes the folding and sealing in a static state after the packaging bag reaches the sealing station, which is more stable and reliable than sealing in the conveying state.

[0024] 3) This invention uses an insert-type folding edge, which is quick and convenient. The folded edge seam can prevent sand and dust from entering, ensuring the quality of the items inside the bag. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the initial state of the main structure of the present invention;

[0026] Figure 2 This is a schematic diagram of the extended state of the folded edge fork of the main structure of the present invention;

[0027] Figure 3 This is a schematic diagram of the main structure of the present invention, showing the clamping state of the bag-clamping rod;

[0028] Figure 4 This is a schematic diagram of the frame structure of the present invention.

[0029] Figure 5 This is a schematic diagram of the ton bag folding assembly structure of the present invention.

[0030] Figure 6 This is a schematic diagram of the folded-edge fork structure of the present invention.

[0031] Figure 7 This is a schematic diagram of the ton bag sewing assembly structure of the present invention.

[0032] Figure 8 This is an exploded view of the ton bag sewing assembly of the present invention.

[0033] In the diagram: 1. Frame; 2. Ton bag folding assembly; 3. Ton bag sewing assembly; 4. Bag clamping rod; 5. Bag clamping swing cylinder; 6. Bag clamping rod shaft; 7. Clamping rod pin; 8. Connecting rod; 9. Crank pin; 10. Crank;

[0034] 201. Folding linear slide; 202. Folding swing cylinder; 203. Folding connecting base plate; 204. Folding shift fork; 205. Folding slide slider;

[0035] 301. Linear slide; 302. Slide servo motor; 303. Sewing bag translation bracket; 304. Sewing bag thread tower bracket; 305. Thread breakage detection component; 306. Sewing bag machine bracket; 307. Linear guide rail; 308. Linear slider; 309. Lifting cylinder; 310. Sewing bag machine; 311. Motor mounting plate; Motor adjusting bolt; 313. Sewing bag motor; 314. Sewing bag belt cover; 315. Pulley; 316. Belt. Detailed Implementation

[0036] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" 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 or an electrical 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 will understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0037] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present invention.

[0038] like Figures 1-4 As shown, this embodiment provides a ton bag folding and sewing machine, including a frame 1, a ton bag folding assembly 2, a ton bag sewing assembly 3, a bag clamping rod 4, a bag clamping swing cylinder 5, a bag clamping rod rotating shaft 6, a bag clamping rod pin 7, a connecting rod 8, a crank pin 9, and a crank 10; the ton bag folding assembly 2 is fixedly mounted in the middle of the frame 1, and the ton bag sewing assembly 3 is fixedly mounted on one side of the frame 1; a set of bag clamping rods 4 are symmetrically hinged to the front end of the frame 1 through the bag clamping rod rotating shaft 6, and each bag clamping rod 4... A connecting rod 8 is provided in the middle of the outer side. The other end of the connecting rod 8 is hinged to the crank 10. A bag-clamping swing cylinder 5 is fixed on the lower part of one side of the frame 1. The crank 10 is fixed on the rotating shaft of the bag-clamping swing cylinder 5. The front end of the crank 10 is connected to one end of the connecting rod 8 through the crank pin 9. The other end of the connecting rod 8 is connected to the middle of the bag-clamping rod 4 through the clamping rod pin 7. The crank 10 is driven by the bag-clamping swing cylinder 5 to realize the opening and closing of a set of bag-clamping rods 4 within a 90° range, which is used to clamp the bag mouth of the folded packaging bag.

[0039] like Figure 5 and Figure 6As shown, the ton bag folding assembly 2 includes a folding linear slide 201, a folding swing cylinder 202, a folding connecting plate 203, a folding fork 204, and a folding slide slider 205. The folding linear slide 201 is equipped with a folding slide slider 205 that can slide linearly along it. The folding slide slider 205 is equipped with the folding connecting plate 203. The folding swing cylinder 202 is fixed to the folding slide slider 205 via the folding connecting plate 203. A folding swing cylinder 202 is installed on the sliding block 205. A folding fork 204 is connected to the folding swing cylinder 202. The folding fork 204 consists of two parallel rods. One end of the two rods is connected by a connecting rod. The swing cylinder 202 is hinged to the connecting rod of the folding fork 204, so that the folding fork 204 can rotate to achieve reciprocating swing of 0°-270°. A set of bag clamping rods 4 clamps the bag at the lower part of the middle of the two rods of the folding fork 204.

[0040] like Figure 7 and Figure 8 As shown, the ton bag sewing assembly 3 includes a sewing linear slide 301, a slide servo motor 302, a sewing translation bracket 303, a sewing thread tower bracket 304, a thread breakage detection component 305, a sewing machine bracket 306, a linear guide rail 307, a linear slider 308, a lifting cylinder 309, a sewing machine 310, a motor fixing plate 311, a motor adjusting bolt 312, a sewing motor 313, and a sewing belt cover 314. The sewing linear slide 301 is mounted on the bottom plane of the frame 1, and a slide servo motor 302 is mounted on one side of one end of the sewing linear slide 301. The linear slide table 301 for sewing bags has a sewing bag translation bracket 303 on its slider. One end of the sewing bag translation bracket 303 has a sewing thread tower bracket 304 for holding the sewing thread, and the middle has a thread breakage detection component 305. The other end has two parallel linear guide rails 307 perpendicular to it, and each linear guide rail 307 has a linear slider 308. The linear sliders 308 are connected to the inner side of the sewing machine bracket 306. A sewing machine 310 (existing structure) is fixed to the front end of the sewing machine bracket 306. A sewing motor 313 is fixed to the rear end of the sewing machine bracket 306 via a motor fixing plate 311. The sewing motor 313 is connected to the sewing machine 310. The sewing machine 310 is controlled by pulley 315 and belt 316. A sewing belt cover 314 is provided on the upper end of the sewing machine 310 and the sewing motor 313 to prevent dust from entering and reducing the machine's lifespan. A motor adjusting bolt 312 is provided between the sewing machine bracket 306 and the motor fixing plate 311 to adjust the belt tension. A lifting cylinder 309 is also provided on the sewing machine translation bracket 303. The lifting cylinder 309 is located between two linear guide rails 307. The piston rod of the lifting cylinder 309 is connected to the sewing machine bracket 306 through a fisheye connector, driving the sewing machine bracket 306 to move up and down along the linear guide rails 307, thereby realizing the lifting and lowering of the sewing machine 310.

[0041] The working method of this invention is as follows:

[0042] 1) The filled ton bags are moved to the sealing station by the bag-taking rod of the packaging machine, and the bag opening is stopped. The folding fork 204 is controlled to slide in a straight line on the folding linear slide table 201. The folding fork 204 extends so that the bag opening is between the two levers of the folding fork 204. At the same time as the bag-taking rod is released, the folding swing cylinder 202 drives the folding fork 204 to rotate 270° to fold the bag opening.

[0043] 2) The bag clamping swing cylinder 5 is started, driving the two bag clamping rods 4 to clamp the bag opening after folding. The folding linear slide 201 drives the folding fork 204 to retract and pull it out from the bag opening after folding to complete the folding. After the folding fork 204 is retracted, the swing cylinder 202 drives the folding fork 204 to rotate 270° in the opposite direction to reset.

[0044] 3) The lifting cylinder 309 drives the sewing machine 310 to descend, the slide servo motor 302 drives all the fixed parts on the sewing machine 310 to move forward, and at the same time the sewing machine 313 starts to drive the needle of the sewing machine 310 to sew the opening. After the sewing is completed, the sewing machine 310 automatically cuts the thread, the sewing machine 313 stops, the slide servo motor 302 stops, the sewing machine 310 stops moving forward, the lifting cylinder 309 drives the sewing machine 310 to rise, the slide servo motor 302 drives all the fixed parts on the sewing machine 310 to move backward, and the bag clamping swing cylinder 5 starts to drive the two bag clamping rods 4 to open. The sealing is completed and the ton bag is moved out of the sealing station. The above process is repeated to seal continuously.

[0045] Many specific details have been set forth in the foregoing description in order to provide a full understanding of the invention. However, the invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the invention is not limited to the specific embodiments disclosed above.

[0046] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A ton bag folding and sewing machine, comprising a frame (1), a set of bag clamping rods (4) symmetrically hinged to the front end of the frame (1), a connecting rod (8) provided at the middle of the outer side of each bag clamping rod (4), the other end of the connecting rod (8) being hinged to a crank (10), the crank (10) being driven by a bag clamping swing cylinder (5) to realize the opening and closing of the set of bag clamping rods (4), characterized in that, The frame (1) is fixedly provided with a ton bag folding assembly (2) in the middle, and a ton bag sewing assembly (3) is fixedly provided on one side of the frame (1). The ton bag folding assembly (2) includes a folding linear slide (201), a folding slide slider (205) that can slide along its straight line on the folding linear slide (201), a folding swing cylinder (202) on the folding slide slider (205), a folding fork (204) connected to the folding swing cylinder (202), the folding fork (204) is composed of two parallel rods, one end of the two rods is connected by a connecting rod, the swing cylinder (202) is hinged to the connecting rod of the folding fork (204), so that the folding fork (204) can rotate to achieve a reciprocating swing of 0°-270°, and a set of bag clamping rods (4) clamps the bag at the lower part of the middle of the two rods of the folding fork (204).

2. The ton bag folding and sewing machine according to claim 1, characterized in that, The ton bag sewing assembly (3) includes a sewing linear slide (301). A slide servo motor (302) is provided on one side of one end of the sewing linear slide (301). A sewing translation bracket (303) is provided on the slider of the sewing linear slide (301). Two parallel linear guide rails (307) are provided perpendicularly to one side of the sewing translation bracket (303). A linear slider (308) is provided on each linear guide rail (307). The linear slider (308) is located inside the sewing machine bracket (306). A sewing machine (310) is fixed on the sewing machine bracket (306). A lifting cylinder (309) is also provided on the sewing translation bracket (303). The piston rod of the lifting cylinder (309) is connected to the sewing machine bracket (306) through a fisheye connector, driving the sewing machine bracket (306) to move up and down along the linear guide rail (307) to realize the lifting and lowering of the sewing machine (310).

3. A ton bag folding and sewing machine according to claim 2, characterized in that, The sewing machine (310) is connected to a sewing motor (313), and the sewing motor (313) and the sewing machine (310) are driven by a pulley (315) and a belt (316).

4. A ton bag folding and sewing machine according to claim 1 or 2, characterized in that, The folding slide block (205) is fixedly provided with a folding connecting seat plate (203), and the folding swing cylinder (202) is fixedly provided on the folding slide block (205) through the folding connecting seat plate (203).

5. A ton bag folding and sewing machine according to claim 3, characterized in that, One end of the sewing bag translation bracket (303) is provided with a sewing bag thread tower bracket (304), and the middle part is provided with a broken thread detection component (305).

6. A ton bag folding and sewing machine according to claim 5, characterized in that, The lifting cylinder (309) is located between two linear guide rails (307), and the sewing linear slide (301) is located on the bottom plane of the frame (1).

7. A ton bag folding and sewing machine according to claim 6, characterized in that, The sewing machine motor (313) is mounted on the sewing machine bracket (306) via a motor mounting plate (311).

8. A ton bag folding and sewing machine according to claim 7, characterized in that, A motor adjusting bolt (312) is provided between the sewing machine bracket (306) and the motor fixing plate (311) to adjust the belt tension.

9. A ton bag folding and sewing machine according to claim 8, characterized in that, The sewing motor (313) and the sewing machine (310) are equipped with sewing belt covers (314) at their upper ends.

10. The working method of a ton bag folding and sewing machine according to claim 1, characterized in that, The steps are as follows: 1) The filled ton bag is moved to the sealing station by the bag-leading bar of the packaging machine. The folding fork (204) is controlled to slide in a straight line on the folding linear slide (201). The folding fork (204) extends so that the bag opening is between the two levers of the folding fork (204). At the same time as the bag-leading bar is released, the folding swing cylinder (202) drives the folding fork (204) to rotate 270° to fold the bag opening. 2) Start the bag clamping swing cylinder (5) to drive the two bag clamping rods (4) to clamp the bag opening after folding. The folding straight slide (201) drives the folding fork (204) to retract. The bag opening after folding is pulled out to complete the folding. After the folding fork (204) retracts, the folding swing cylinder (202) drives the folding fork (204) to rotate 270° in the opposite direction to reset. 3) The lifting cylinder (309) drives the sewing machine (310) to descend and seal the bag opening. After sealing, the bag clamping swing cylinder (5) is started to drive the two bag clamping rods (4) to open. After sealing, the ton bag can be moved out of the sealing station.

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