Valve bag edge sealing mechanism and production device

Abstract

The present invention provides a valve bag edge sealing mechanism and a production device, including a machine body and a guide assembly, a clamping assembly and a heat sealing assembly arranged on the machine body, the guide assembly including two sets of guide rails facing each other, and two sets of slide grooves extending along the length direction of the guide rails are provided on the opposite sides of each set of guide rails; the guide rails are divided into a first rail section and a second rail section connected to each other, and the gap between the two sets of slide grooves in the second rail section is smaller than the gap between the two sets of slide grooves in the first rail section; the clamping assembly is connected to a power mechanism, and the clamping assembly includes two sets of clamping plates facing each other for clamping the valve bag; the upper and lower ends of each set of clamping plates are slidably connected in the slide grooves of a set of guide rails; the heat sealing assembly includes heat sealing knives relatively arranged in the second rail sections of the two sets of guide rails; in the valve bag edge sealing mechanism and production device of the present invention, due to the clamping of the clamping assembly, the valve bag can be smoothly sealed by the heat sealing knife, and the two ends of the valve bag can be sealed in one operation, and the operation is convenient and reliable.

Description

Technical Field

[0001] The present invention relates to the field of valve bag production, and in particular to a valve bag edge sealing mechanism and a production device. Background Art

[0002] Compared with ordinary packaging bags, valve bags are also equipped with a set of special feeding valves on the top / bottom sides. Therefore, during the production process of ordinary bags, the top opening needs to be retained, and after the filling is completed in the subsequent use, the top edge of the bag body is closed. However, since valve bags have special feeding valves on the sides, their top and bottom ends are sealed during the production process.

[0003] At present, the kraft paper valve bags and other plastic valve bags with film layers on the market can be sealed by heat sealing or wire sealing. However, when sealing ordinary bags, the vertical / horizontal plastic bag sealing machines commonly used on the market can place the bag directly on the conveyor belt for transportation because the bag has been filled and has a certain weight. During the movement, the top of the bag can be sealed by the heat sealing mechanism above. When the above-mentioned plastic sealing machines seal the valve bags, because the valve bags are not filled and have a light weight, it is difficult to ensure that the valve bags can pass through the sealing mechanism smoothly by using traditional conveyor belts for transportation, and the above-mentioned plastic sealing machines cannot simultaneously seal the top and bottom ends of the valve bags.

[0004] In view of this, it is necessary to improve the above-mentioned plastic edge sealing mechanism to adapt to the edge sealing of valve bags. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the background technology and provide a valve bag edge sealing mechanism and production device.

[0006] The embodiments of the present invention are achieved through the following technical solutions:

[0007] In one aspect, the present invention provides a valve bag edge sealing mechanism, comprising a body and:

[0008] The guide assembly includes two sets of guide rails facing each other vertically, and two sets of slide grooves extending along the length of the guide rails are provided on opposite sides of each set of guide rails; the guide rails are divided into a first track segment and a second track segment, wherein the gap between the two sets of slide grooves in the second track segment is smaller than the gap between the two sets of slide grooves in the first track segment;

[0009] a clamping assembly connected to a power mechanism for driving the clamping assembly to reciprocate along the guide rail; the clamping assembly includes two opposing sets of clamping plates for clamping the valve bag; upper and lower ends of each set of clamping plates are slidably connected to the slide grooves of a set of the guide rails, so that when the clamping assembly slides from the first track segment into the second track segment, the two sets of clamping plates gather to clamp the valve bag; and

[0010] The heat sealing assembly includes heat sealing knives relatively arranged in the second track segments of the two groups of guide rails, and the heat sealing knives in each group of the second track segments are located between the two groups of slide grooves, so as to seal the two ends of the valve bag.

[0011] Furthermore, one end of the second track segment is connected to the first track segment, and the other end is also connected to the third track segment. The gap between the two groups of the chute in the third track segment is larger than the gap between the two groups of the chute in the second track segment. Each group of the clamping plates is also provided with a set of adsorption components. The two groups of adsorption components are relatively adsorbed on the two side surfaces of the valve port of the valve bag. When the clamping component clamps the valve bag and enters the third track segment, the valve port is opened.

[0012] The machine body is also provided with a blowing assembly located between the two groups of the third rail segments. The blowing assembly is provided with a group of flat air nozzles. When the valve bag enters the third rail segment, the air nozzles are inserted into the valve port for blowing.

[0013] Furthermore, the adsorption assembly includes a suction cup attached to the surface of the valve port and a piston cylinder connected to the suction cup, and the piston cylinder is arranged on the clamping plate; a first return spring connected to the piston rod is arranged in the piston cylinder to compress the space in the piston cylinder;

[0014] A baffle rod is also provided on the body beside the second track segment, and a group of baffle bars are also provided at the end of the piston rod near the first track segment in the piston cylinder. When the clamping assembly carries the piston cylinder into the third track segment, the baffle bars abut against the baffle rod to expand the inner cavity of the piston cylinder, and the negative pressure of the suction cup is adsorbed on the surface of the valve port to drive the valve port to open.

[0015] Furthermore, two groups of drag plates are disposed opposite to each other on the two groups of clamping plates. The first end of the drag plates near the third rail segment is connected to the clamping plates, and the second end near the first rail segment is bent to form a dragging portion.

[0016] In a natural state, the distance between the second ends of the two groups of drag sheets is greater than the distance between the first ends, so that the valve bag can pass between the two groups of dragging portions; when the clamping assembly enters the third track segment, the outer wall of the drag sheet slides in contact with the blocking bar, so that the dragging portions at the second ends of the two groups of drag sheets gather together, thereby preventing the valve bag from sliding out from between the second ends of the two groups of drag sheets.

[0017] Furthermore, the second end of the third rail segment is connected to the second rail segment, a slide rail segment is further provided on the machine body at the first end of the third rail segment, the air blowing assembly is arranged on the slide rail segment, and the air nozzle is slidably connected to the slide rail segment;

[0018] The air nozzle is connected to a set of moving mechanisms, and the moving mechanisms are configured to: drive the air nozzle to slide from the slide rail section into the third rail section when the clamping assembly slides from the first rail section into the second rail section; and drive the air nozzle to slide from the third rail section into the slide rail section when the clamping assembly slides from the third rail section into the second rail section.

[0019] Furthermore, a set of vertical plates is provided on the machine body between the third rail segment and the slide rail segment, and the vertical plates are used to prevent the valve bag from entering the slide rail segment, and the vertical plates are provided with long strip holes for the gas nozzle to pass through;

[0020] A non-return assembly is further provided at the end of the heat-sealing knife close to the third track segment. The non-return assembly includes two groups of clips hinged relative to each other at the end of the heat-sealing knife. The free ends of the two groups of clips are driven to close by a magnetic member so that a V-shaped opening facing the first track segment is formed between the two groups of clips. When the clamping assembly carries the valve bag into the third track segment, the free ends of the two groups of clips are closed to prevent the valve bag from passing through the heat-sealing knife again.

[0021] Furthermore, the side close to the slide rail section is defined as the first end of the body, and the side close to the first track section is defined as the second end of the body, and the moving mechanism includes:

[0022] a first piston cylinder, which is provided on the machine body between the third track segment and the slide rail segment; and a first piston and a second piston are provided in the first piston cylinder along the direction from the first end to the second end of the machine body, so as to divide the first piston cylinder into a sealed first chamber and a sealed second chamber in sequence; the second piston is connected to the clamping assembly via a first telescopic joint; a second return spring is provided in the first chamber for pushing the compressed first chamber to expand; and a second telescopic joint is also provided in the first chamber for limiting the axial length of the first chamber; and

[0023] The second piston cylinder has a piston rod fixedly connected to the slide rail section, and the cylinder body is slidably arranged on the slide rail section, and the blowing assembly is installed on the cylinder body; the first chamber is connected to the air nozzle through a hose; the second chamber is connected to the second piston cylinder through a hose.

[0024] Furthermore, the power mechanism includes a reciprocating screw arranged along the length direction of the guide rail and a motor drivingly connected to the reciprocating screw;

[0025] Among the two groups of splints, one group of splints is provided with a connecting strip that can be slidably inserted into the other group of splints so that the spacing between the two groups of splints can be adjusted, and any group of splints is provided with a slider installed on the reciprocating screw rod.

[0026] Furthermore, the air nozzle matches the inner contour of the valve opening of the valve bag.

[0027] On the other hand, the present invention further provides a valve bag production device, wherein the valve bag production device includes the valve bag edge sealing mechanism as described above.

[0028] The technical solutions of the embodiments of the present invention have at least the following advantages and beneficial effects:

[0029] In the valve bag edge sealing mechanism and production device of the present invention, the distance between the two sets of clamps in the clamping assembly is enlarged in the first track section, which can facilitate the placement of the valve bag into the clamping assembly, and the distance between the two sets of clamps in the process of the clamping assembly entering the second track section from the first track section is reduced, which can effectively clamp the two sides of the valve bag. During the edge sealing process driven by the power mechanism, due to the clamping of the clamping assembly, the valve bag can be smoothly sealed by the heat sealing knife, and both ends of the valve bag can be sealed in one operation, which is convenient and reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 Schematic diagram of the structure of the valve bag edge sealing mechanism in an embodiment of the present invention Figure 1 ;

[0031] Figure 2 Schematic diagram of the structure of the valve bag edge sealing mechanism in an embodiment of the present invention Figure 2 ;

[0032] Figure 3 for Figure 2 An enlarged view of part A;

[0033] Figure 4 The three-dimensional structure of the clamping assembly in the embodiment of the present invention Figure 1 ;

[0034] Figure 5 The three-dimensional structure of the clamping assembly in the embodiment of the present invention Figure 2 ;

[0035] Icons: 1-body, 10-lower platform, 11-upper platform, 12-support frame, 13-vertical plate, 14-stop rod, 15-valve bag, 150-valve port, 2-guide assembly, 20-guide rail, 200-slide, 2a-first rail segment, 2b-second rail segment, 2c-third rail segment, 2d-slide rail segment, 3-clamping assembly, 30-splint, 300-roller, 31-connecting strip, 4-power mechanism, 40-reciprocating screw, 41-motor, 42-slider, 5-heat sealing assembly, 50-heat sealing knife, 6-adsorption assembly , 60-suction cup, 61-piston cylinder, 62-stop bar, 63-drag piece, 630-holding part, 7-blowing assembly, 70-air nozzle, 8-moving mechanism, 80-first piston cylinder, 800-first piston, 801-second piston, 802-second return spring, 803-second telescopic section, 804-first chamber, 805-second chamber, 81-first telescopic section, 82-second piston cylinder, 820-cylinder body, 9-check assembly, 90-clamp, 900-first magnetic part, 91-second magnetic part, 92-limiting nail. DETAILED DESCRIPTION

[0036] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0037] Example 1:

[0038] Reference Figures 1 to 5 This embodiment provides a valve bag 15 edge sealing mechanism for simultaneously sealing the upper and lower ends of the valve bag 15. The edge sealing mechanism adopts a vertical structure, which includes a body 1, a guide component 2 arranged on the body 1, a clamping component 3 and a heat sealing component 5.

[0039] The machine body 1 is provided with a lower platform 10 and an upper platform 11 which are opposite to each other. The lower platform 10 and the upper platform 11 are both in the shape of long strips and are supported by a plurality of support frames 12 .

[0040] Reference Figure 1 The guide assembly 2 includes two sets of guide rails 20 facing each other, that is, a set of guide rails 20 is provided on the opposite surfaces of the lower platform 10 and the upper platform 11. The two ends of the guide rails 20 are connected to the lower platform 10 / upper platform 11 through pads, and the part of the guide rails 20 located between the two sets of pads is suspended.

[0041] Reference Figure 2, two groups of slide grooves 200 extending along the length direction of the guide rails 20 are provided on the opposite surfaces of each group of guide rails 20, and the guide rails 20 are divided into a first rail segment 2a and a second rail segment 2b that are connected. It is defined that the body 1 has a first end and an end relative to each other, and the first rail segment 2a is provided on the side of the second end of the body 1. In this embodiment, the gap between the two groups of slide grooves 200 in the second rail segment 2b is smaller than the gap between the two groups of slide grooves 200 in the first rail segment 2a, and the slide grooves 200 in the first rail segment 2a are smoothly transitioned to the slide grooves 200 in the second rail segment 2b.

[0042] Reference Figure 1 、 Figure 4 and Figure 5 The clamping assembly 3 includes two opposite groups of clamping plates 30, which are used to clamp the valve bag 15. Two groups of rollers 300 are provided at the upper and lower ends of each group of clamping plates 30. The two groups of rollers 300 are slidably embedded in the slide groove 200. Under the drive of the power mechanism 4, the clamping assembly 3 slides from the first track segment 2a to the second track segment 2b. As the distance between the two groups of slide grooves 200 is reduced, the two groups of clamping plates 30 are retracted to clamp the valve bag 15.

[0043] The purpose of the power mechanism 4 is to drive the clamping assembly 3 to move along the extension direction of the guide rail 20. Therefore, the power mechanism 4 can be a common structure capable of linear motion, such as a pneumatic cylinder, a hydraulic cylinder, or a linear motor.

[0044] In this embodiment, the power mechanism 4 includes a reciprocating screw 40 arranged along the length direction of the guide rail 20 and a motor 41 driven by the reciprocating screw 40. Among the two groups of splints 30, one group of splints 30 is provided with a connecting strip 31 that can be slidably inserted into the other group of splints 30, so that the spacing between the two groups of splints 30 can be adjusted. One group of splints 30 can drive the other group of splints 30 to move synchronously. One group of splints 30 is provided with a slider 42 installed on the reciprocating screw 40, which can be driven by the motor to make the clamping assembly 3 move back and forth.

[0045] The heat sealing assembly 5 adopts the existing technology, which includes a heat sealing knife 50 relatively arranged in the second track section 2b of the two sets of guide rails 20. There is a set of slits in the heat sealing knife 50. When the valve bag 15 passes through the slits, the heat sources on both sides of the slits seal the upper and lower ends of the valve bag 15. Therefore, the heat sealing knife 50 in the second track section 2b is located between the two sets of slide grooves 200. When the clamp 30 clamps the valve bag 15 and moves, the edges to be sealed at the upper and lower ends of the valve bag 15 just pass through the slits in the heat sealing knife 50.

[0046] During use, when the clamping assembly 3 moves to the first track segment 2a, the distance between the two sets of clamps 30 is slightly larger, and the valve bag 15 to be sealed can be inserted between the two sets of clamps 30, and then the clamping assembly 3 moves to the second track segment 2b, and the distance between the two sets of clamps 30 is reduced to clamp the valve bag 15, driving the valve bag 15 through the gap in the heat sealing knife 50 for edge sealing. After the edge sealing is completed, the clamping assembly 3 drives the valve bag 15 back to the first track segment 2a, and the valve bag 15 with completed edge sealing can be removed.

[0047] Example 2:

[0048] During the heat sealing process of the valve bag 15 , some areas of the sealed edge may be incompletely sealed or leak sealed. Therefore, this embodiment further provides a structure for inspecting the heat sealing quality of the valve bag 15 .

[0049] Reference Figure 1 , it is defined that the second end of the second track segment 2b is connected to the first track segment 2a, and the first end of the second track segment 2b is also connected to the third track segment 2c, and the gap between the two groups of slide grooves 200 in the third track segment 2c is larger than the gap between the two groups of slide grooves 200 in the second track segment 2b, that is, in the process from the first track segment 2a, the second track segment 2b, and then to the third track segment 2c, the gap between the two groups of slide grooves 200 first decreases and then increases.

[0050] Refer to 1 and Figure 5 When the clamping assembly 3 is working, the valve port 150 of the valve bag 15 faces the side of the third track segment 2c. Each set of clamping plates 30 is also provided with a set of adsorption components 6. The adsorption component 6 includes a suction cup 60 adsorbed on the valve port 150, and a piston cylinder 61 connected to the adsorption 60. The piston cylinder 61 is installed on the clamping plate 30. A first return spring connected to the piston rod is provided in the piston cylinder 61 to compress the space inside the piston cylinder 61; under the action of the first return spring, the inner cavity of the piston cylinder 61 is reduced to a minimum; the two sets of suction cups 60 are relatively adsorbed on the two side surfaces of the valve port 150, and the clamping assembly 3 clamps the valve bag 15 to complete the edge sealing and continues to enter the third track segment 2c.

[0051] Reference Figure 1 The machine body 1 is also provided with a blowing assembly 7 located between the upper and lower sets of third track segments 2c. A set of flat air nozzles 70 are provided in the blowing assembly 7. The air nozzles 70 match the inner contour of the valve port 150 or are slightly smaller than the inner contour of the valve port 150. When the clamping assembly 3 drives the valve bag 15 into the third track segment 2c, the air nozzles 70 are facing the valve port 150.

[0052] Reference Figure 2, a stop rod 14 is further provided on the machine body 1 beside the second track segment 2b, and a set of stop bars 62 are further provided at the end of the piston rod near the first track segment 2a in the piston cylinder 61. When the clamping assembly 3 carries the piston cylinder 61 into the third track segment 2c, when the stop bar 62 contacts the stop rod 14, the stop bar 62 abuts against the stop rod 14, and the piston cylinder 61 continues to move under the movement of the clamping assembly 3. The inner cavity of the piston cylinder 61 overcomes the tension of the first return spring and continues to expand; since the distance between the two sets of slide grooves 200 in the second track segment 2b is shortened, the distance between the two sets of clamping plates 30 is shortened. The distance between the two groups of suction cups 60 is reduced to a minimum. During the process, the suction cup 60 is fully squeezed on the surfaces on both sides of the valve port 150. When the negative pressure of the piston cylinder 61 is adsorbed on the surface of the valve port 150 through the suction cup 60, as the two groups of clamps 30 enter the third track segment 2c, the distance between the two groups of suction cups 60 is gradually expanded, and the valve port 150 can be opened. When the valve bag 15 enters the third track segment 2c, the air nozzle 70 facing the valve port 150 can blow air into the valve bag 15. According to the inflation condition of the valve bag 15, it can be judged whether the upper and lower ends of the valve bag 15 are leaking, and then it can be judged whether it is leaking.

[0053] As for the timing of inflating the air nozzle 70, a proximity switch can be set near the suction cup 60. When the system detects that the valve port 150 is aligned with the air nozzle 70, it starts to inflate until the air nozzle 70 is fully inserted into the valve bag 15 and the clamping assembly 3 completes the third track segment 2c.

[0054] In addition, during the inflation process, the distance between the two sets of clamps 30 is enlarged to prevent the gas generated by the nozzle 70 from blowing the valve bag 15 toward the first track segment 2a; Figure 4 and Figure 5 Two sets of drag plates 63 are also provided opposite to each other on the two sets of clamps 30. The first end of the drag plates 63 near the third rail segment 2c is connected to the side wall of the clamp 30, and the second end near the first rail segment 2a is bent to form a drag portion 630. In the natural state, the distance between the second ends of the two sets of drag plates 63 is greater than the distance between the first ends, so that the valve bag 15 can pass between the two sets of drag portions 630. When the clamping assembly 3 enters the third rail segment 2c, the outer wall of the drag plate 63 slides in contact with the blocking bar 62, so that the drag portions 630 at the second ends of the two sets of drag plates 63 are gathered together, blocking the end of the valve bag 15 away from the valve port 150, so as to prevent the valve bag 15 from sliding out from between the second ends of the two sets of drag plates 63.

[0055] Embodiment three:

[0056] In this embodiment, the structure of the air blowing assembly 7 is improved.

[0057] Specifically, the second end of the third rail segment 2c is connected to the second rail segment 2b, and a slide rail segment 2d is also provided on the body 1 at the first end of the third rail segment 2c. The blowing assembly 7 is arranged on the slide rail segment 2d, and the air nozzle 70 is slidably connected to the slide rail segment 2d and can move back and forth along the direction of the slide rail segment 2d.

[0058] A set of vertical plates 13 are provided on the body 1 between the third rail segment 2c and the slide rail segment 2d. The vertical plates 13 are used to prevent the valve bag 15 from entering the slide rail segment 2d. The vertical plates 13 are provided with long strip holes for the air nozzle 70 to pass through. That is, when the air nozzle 70 retracts from the third rail segment 2c to the slide rail segment 2d, the valve bag 15 can be separated from the air nozzle 70 due to the obstruction of the vertical plates 13.

[0059] Specifically, refer to Figure 1 The air nozzle 70 is also connected to a set of moving mechanisms 8, wherein the moving mechanism 8 includes a first piston cylinder 80 and a second piston cylinder 82.

[0060] The first piston cylinder 80 is located inside the body 1 between the third track segment 2c and the slide rail segment 2d, and is located below the lower platform 10. Along the direction from the first end to the second end of the body 1, a first piston 800 and a second piston 801 are provided in the first piston cylinder 80. The first piston cylinder 80 is divided into a sealed first chamber 804 and a sealed second chamber 805 in sequence. The second piston 801 is connected to the clamping assembly 3 through the first telescopic joint 81, that is, the lower end of the clamping assembly 3 extends to the end of the first telescopic joint 81 and is fixed; a second return spring 802 is provided in the first chamber 804 to push the compressed first chamber 804 to expand, and a second telescopic joint 803 is also provided in the first chamber 804 to limit the axial length of the first chamber 804.

[0061] The piston rod of the second piston cylinder 82 is fixedly connected to the slide rail section 2d, the cylinder body 820 of the second piston cylinder 82 is slidably set on the slide rail section 2d, the blowing assembly 7 is installed at the end of the cylinder body 820, the first chamber 804 is connected to the air nozzle 70 through a hose; the second chamber 805 is connected to the second piston cylinder 82 through a hose.

[0062] Driven by the reciprocating screw 40 in the power mechanism 4, the clamping assembly 3 moves back and forth between the first track segment 2a and the third track segment 2c. When the clamping assembly 3 is in the first track segment 2a, the first telescopic section 81 is stretched to its longest position. When the clamping assembly 3 moves to the middle area of ​​the second track segment 2b, during the process, the first telescopic section 81 is shortened to its shortest position. At this time, the second piston 801 does not move. When the clamping assembly 3 moves along the middle of the second track segment 2b to the third track segment 2c, it drives the first telescopic section 81 to push the second piston 801 to move. During the process, the first The piston 800 is supported by the second return spring 802 and remains stationary, the second chamber 805 contracts, and the gas therein is transmitted to the second piston cylinder 82 through the hose, so that the air nozzle 70 at the end of the second piston cylinder 82 enters the third track segment 2c through the vertical plate 13; when the clamping assembly 3 continues to move forward in the third track segment 2c, the second piston 801 abuts against the first piston 800, pushing the first chamber 804 to compress, and the gas in the first chamber 804 enters the valve bag 15 along the air nozzle 70. If the valve bag 15 is inflated due to inflation, its edge sealing is normal.

[0063] Then, the reciprocating screw 40 drives the clamping assembly 3 to reset along the third track segment 2c to the first track segment 2a. Under the action of the second reset spring 802, the gas re-enters the first chamber 804 through the gas nozzle 70 and the hose to complete the reset. When the first telescopic section 81 is extended to its longest, the first telescopic section 81 drags the second chamber 805 to expand and reset, and transfers the gas in the second piston cylinder 82 to the second chamber 805. At the same time, the gas nozzle 70 retracts into the slide rail segment 2d, and the valve bag 15 detaches from the gas nozzle 70.

[0064] During the retraction of the clamping assembly 3, refer to Figure 2 and Figure 5 A non-return assembly 9 is also provided at the end of the heat sealing knife 50 close to the third track segment 2c. The non-return assembly 9 includes two sets of clips 90 relatively hinged at the end of the heat sealing knife 50, and the gap of the heat sealing knife 50 is located between the two sets of clips 90.

[0065] The free ends of the two groups of clips 90 are provided with first magnetic parts 900, and the outside of the two groups of first magnetic parts 900 is provided with second magnetic parts 91. The first magnetic parts 900 and the second magnetic parts 91 repel each other. Limiting pins 92 are also provided on the inside of the two groups of clips 90, so that a V-shaped opening facing the first track segment 2a is formed between the two groups of clips 90. When the clamping assembly 3 carries the valve bag 15 into the third track segment 2c, the free ends of the two groups of clips 90 are closed to prevent the valve bag 15 from passing through the heat sealing knife 50 again.

[0066] Example 4:

[0067] This embodiment provides a valve bag production device, which is equipped with the valve bag edge sealing mechanism of the aforementioned embodiment one, two or three.

[0068] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. Valve bag edge sealing mechanism, characterized in that: It comprises a body (1) and a device provided on the body (1): A guide assembly (2) comprises two sets of guide rails (20) facing each other vertically, wherein two sets of slide grooves (200) extending along the length direction of the guide rails (20) are provided on opposite sides of each set of guide rails (20); the guide rails (20) are divided into a first rail segment (2a) and a second rail segment (2b) connected to each other, wherein the gap between the two sets of slide grooves (200) in the second rail segment (2b) is smaller than the gap between the two sets of slide grooves (200) in the first rail segment (2a); A clamping assembly (3) is connected to a power mechanism (4) for driving the clamping assembly (3) to reciprocate along the guide rail (20); the clamping assembly (3) comprises two opposite sets of clamping plates (30) for clamping the valve bag (15); the upper and lower ends of each set of the clamping plates (30) are slidably connected in the slide grooves (200) of one set of the guide rails (20), so that when the clamping assembly (3) slides from the first track segment (2a) into the second track segment (2b), the two sets of the clamping plates (30) gather together to clamp the valve bag (15); and A heat sealing assembly (5) comprising heat sealing knives (50) arranged relatively in the second track sections (2b) of the two groups of guide rails (20), wherein the heat sealing knives (50) in each group of the second track sections (2b) are located between the two groups of slide grooves (200) for sealing the ends of the valve bag (15); One end of the second track segment (2b) is connected to the first track segment (2a), and the other end is also connected to the third track segment (2c), and the gap between the two groups of the slide grooves (200) in the third track segment (2c) is larger than the gap between the two groups of the slide grooves (200) in the second track segment (2b); each group of the clamping plates (30) is also provided with a group of adsorption components (6), and the two groups of adsorption components (6) are relatively adsorbed on the two side surfaces of the valve port (150) of the valve bag (15); when the clamping component (3) clamps the valve bag (15) and enters the third track segment (2c), the valve port (150) is opened; The machine body (1) is further provided with an air blowing assembly (7) located between the two groups of the third track segments (2c), and a group of flat air nozzles (70) are provided in the air blowing assembly (7). When the valve bag (15) enters the third track segment (2c), the air nozzles (70) are inserted into the valve port (150) for blowing. The second end of the third track segment (2c) is connected to the second track segment (2b), a slide rail segment (2d) is further provided on the machine body (1) at the first end of the third track segment (2c), the air blowing assembly (7) is arranged on the slide rail segment (2d), and the air nozzle (70) is slidably connected to the slide rail segment (2d); The air nozzle (70) is connected to a set of moving mechanisms (8), and the moving mechanisms (8) are configured to: drive the air nozzle (70) to slide from the slide rail section (2d) into the third slide rail section (2c) when the clamping assembly (3) slides from the first slide rail section (2a) into the second slide rail section (2b); and drive the air nozzle (70) to slide from the third slide rail section (2c) into the slide rail section (2d) when the clamping assembly (3) slides from the third slide rail section (2c) into the second slide rail section (2b); The adsorption assembly (6) includes a suction cup (60) attached to the surface of the valve port (150) and a piston cylinder (61) connected to the suction cup (60), wherein the piston cylinder (61) is arranged on the clamping plate (30); a first return spring connected to a piston rod is arranged in the piston cylinder (61) for compressing the space in the piston cylinder (61); A stop rod (14) is further provided on the body (1) beside the second track segment (2b), and a set of stop bars (62) are further provided at the end of the piston rod near the first track segment (2a) in the piston cylinder (61). When the clamping assembly (3) carries the piston cylinder (61) into the third track segment (2c), the stop bars (62) abut against the stop rod (14) to expand the inner cavity of the piston cylinder (61), and the suction cup (60) is negatively adsorbed on the surface of the valve port (150) to drive the valve port (150) to open. Two groups of drag pieces (63) are also arranged opposite to each other on the two groups of clamping plates (30), wherein the first end of the drag piece (63) is connected to the clamping plate (30) near the third rail segment (2c), and a drag portion (630) is bent near the second end of the first rail segment (2a); In a natural state, the distance between the second ends of the two groups of drag pieces (63) is greater than the distance between the first ends, so that the valve bag (15) can pass between the two groups of the dragging portions (630); when the clamping assembly (3) enters the third track segment (2c), the outer wall of the drag piece slides in contact with the blocking bar (62), so that the dragging portions (630) at the second ends of the two groups of the drag pieces (63) gather together, thereby preventing the valve bag (15) from sliding out from between the second ends of the two groups of the drag pieces (63); The side close to the slide rail section (2d) is defined as the first end of the machine body (1), and the side close to the first track section (2a) is defined as the second end of the machine body (1). The moving mechanism (8) includes: a first piston cylinder (80) provided on the machine body (1) between the third track section (2c) and the slide rail section (2d); and a first piston (800) and a second piston (801) provided in the first piston cylinder (80) in a direction from the first end to the second end of the machine body (1) to divide the first piston cylinder (80) into a sealed first chamber (804) and a sealed second chamber (805) in sequence; the second piston (801) is connected to the clamping assembly (3) via a first telescopic joint (81); a second return spring (802) is provided in the first chamber (804) to push the compressed first chamber (804) to expand; and a second telescopic joint (803) is further provided in the first chamber (804) to limit the axial length of the first chamber (804); and The second piston cylinder (82) has a piston rod fixedly connected to the slide rail section (2d), and a cylinder body (820) is slidably arranged on the slide rail section (2d), and the blowing assembly (7) is installed on the cylinder body (820); the first chamber (804) is connected to the air nozzle (70) through a hose; and the second chamber (805) is connected to the second piston cylinder (82) through a hose.

2. The valve bag edge sealing mechanism according to claim 1, characterized in that: A set of vertical plates (13) is provided on the machine body (1) between the third rail section (2c) and the slide rail section (2d), the vertical plates (13) being used to prevent the valve bag (15) from entering the slide rail section (2d), and the vertical plates (13) are provided with a long hole for the air nozzle (70) to pass through; A non-return assembly (9) is also provided at the end of the heat sealing knife (50) close to the third track segment (2c), and the non-return assembly (9) includes two groups of clips (90) relatively hinged to the end of the heat sealing knife (50), and the free ends of the two groups of clips (90) are driven to close by a magnetic member so that a V-shaped opening facing the first track segment (2a) is formed between the two groups of clips (90); when the clamping assembly (3) carries the valve bag (15) into the third track segment (2c), the free ends of the two groups of clips (90) are closed to prevent the valve bag (15) from passing through the heat sealing knife (50) again.

3. The valve bag edge sealing mechanism according to claim 1, characterized in that: The power mechanism (4) includes a reciprocating screw (40) arranged along the length direction of the guide rail (20) and a motor (41) drivingly connected to the reciprocating screw (40); Among the two groups of splints (30), one group of splints (30) is provided with a connecting strip (31) that can be slidably inserted into the other group of splints (30) so that the spacing between the two groups of splints (30) can be adjusted, and any group of splints (30) is provided with a slider (42) installed on the reciprocating screw rod (40).

4. The valve bag edge sealing mechanism according to claim 1, characterized in that: The gas nozzle (70) matches the inner contour of the valve port (150) of the valve bag (15).

5. Valve bag production device, characterized in that: The valve bag (15) production device is provided with a valve bag edge sealing mechanism according to any one of claims 1 to 4.

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