Automatic tissue packaging device for tissue production

Abstract

The present invention provides an automated paper towel packaging device for paper towel production, comprising a workbench, two clamping plates arranged relative to each other on the workbench and having an adjustable distance therebetween, each of the two clamping plates being provided with a cooperating pressure block on its opposite sides, the pressure blocks being connected to the corresponding clamping plates via a connecting mechanism so that when the two clamping plates are in relative operation, the two pressure blocks move toward each other, and when the two clamping plates move away from each other, the two pressure blocks move relative to each other. The present invention facilitates position adjustment between the clamping plates of the packaging device and can also clamp and secure the packaging bag, thereby avoiding the problem of a certain amount of thrust when the paper towel enters the packaging bag, which can easily cause the packaging bag mounted on the two clamping plates to slip and separate from the two clamping plates. This makes the packaging device of the present invention more convenient to operate and provides greater stability in clamping the packaging bag.

Description

Technical Field

[0001] The present invention relates to the technical field of packaging machines, and in particular to an automatic packaging device for paper towel production. Background Art

[0002] Paper towels are daily necessities. The ingredients of paper towels include chlorine, bleaching powder, alcohol, wood pulp and renewable resources. There are many types of paper towels, including tissue paper, roll paper, etc. Among them, tissue paper is popular among the public because of its convenience.

[0003] At present, tissue paper needs to be packaged in packaging bags, which are then sealed and transported to the destination. In the actual tissue packaging process, a packaging bag with an open end needs to be selected first. The staff then holds the packaging bag by hand and moves it to the packaging machine. The packaging machine pushes a fixed number of tissues into the packaging bag, and finally heat-seals it to complete the packaging of the tissues. However, the existing packaging machines can only package a fixed number of tissues. For larger quantities of tissues, new packaging machines need to be purchased, which increases production costs.

[0004] To this end, in the prior art (patent authorization number CN112678277B, named a tissue packaging machine) the distance between the two clamping plates used for clamping the packaging bag is adjusted, thereby achieving the packaging of tissues of different thicknesses without the need to purchase a new packaging machine.

[0005] In the above patented technology, the structure for adjusting the distance between the two plywood is relatively complex, and when packaging paper towels with larger thickness variations, the presence of the internal wedge block limits the moving distance of the threaded rod, and thus cannot adapt to the packaging of paper with larger thickness variations. For this reason, it is easy for those skilled in the art to think of directly setting a servo cylinder on the opposite sides of the two plywood or connecting a servo cylinder to one of the plywood, and controlling the moving distance of the piston rod of the servo cylinder by the required moving distance to achieve the change in position between the two plywood, thereby adapting to the packaging operation of paper towels of different thicknesses.

[0006] However, even though technicians in this field can easily think of using a servo cylinder to control the distance between the two clamps, since the packaging bag is a plastic film, there is a problem of instability when it is fixed to the clamps. As a result, the position adjustment between the two clamps is convenient, but the edge of the packaging bag is prone to slipping, which may lead to the failure of the packaging operation. Therefore, it is necessary to provide a device that is easy to adjust the distance between the two clamps and can firmly mount the packaging bag between the two clamps to facilitate automatic packaging of paper towels. Summary of the Invention

[0007] In view of the deficiencies in the prior art, the present invention provides an automatic paper towel packaging device for paper towel production, which solves the problems in the prior art of complex distance adjustment between the two clamping plates and unreliable fixation of the packaging bag.

[0008] According to an embodiment of the present invention, an automatic packaging device for paper towels used in paper towel production includes a workbench, two plywoods arranged opposite to each other and with an adjustable distance on the workbench, and the two plywoods are respectively provided with a pressure block on the away sides thereof for use therewith. The pressure blocks are connected to the corresponding plywoods through a connecting mechanism so that when the two plywoods are used relative to each other, the two pressure blocks move backwards, and when the two plywoods move backwards, the two pressure blocks move relative to each other.

[0009] Furthermore, the two splints are connected to servo cylinders on their opposite sides, both of which are fixed to the workbench and work simultaneously to change the distance between the two splints.

[0010] Furthermore, the connecting mechanism includes a driven rack fixed to the clamping block, an active rack fixed to the corresponding clamping plate and relatively parallel to the driven rack, and at least one rotating gear meshing with both the driven rack and the active gear. The active rack is parallel to the moving direction of the two clamping plates, the rotating gear is rotatably connected to the workbench, and the driven rack is slidably arranged with the workbench.

[0011] Furthermore, the opposite sides of the pressing block and the clamping plate are respectively provided with anti-skid clamping blocks made of rubber, and the two anti-skid clamping blocks are respectively provided with serrated patterns, and when the two anti-skid clamping blocks are in contact, the two patterns on the two anti-skid clamping blocks are interlocked.

[0012] Furthermore, the inner walls of any V-shaped grooves of the pattern are provided with rubber protrusions that protrude from each other.

[0013] Furthermore, the clamping block is movably connected to the driven rack, and the clamping block is fixed on a threaded rod parallel to the driven rack. The threaded rod is threadedly connected to a rotating sleeve rotatably connected to the driven rack. External force drives the rotating sleeve to rotate, driving the position of the clamping block and the driven rack to change.

[0014] Furthermore, the driven rack is provided with a through hole arranged along its length direction, the rotating sleeve is arranged at the end of the through hole away from the clamping block and is rotatably connected to the through hole, the rotating sleeve is arranged on the same center line as the through hole and partially extends out of the end of the through hole, and the threaded rod passes through the through hole and is threadedly connected to the rotating sleeve.

[0015] Furthermore, a locking assembly is provided between the rotating sleeve and the driven rack.

[0016] The locking assembly includes a locking bolt threadedly connected to the rotating sleeve and an annular locking groove provided on the driven rack. The locking bolt is connected to the locking groove to lock the rotating sleeve and the driven rack.

[0017] Furthermore, both clamps include vertical sections connected to each other and inclined sections inclined toward the other clamp, and the two clamps constitute a constricted material guide trough structure, and the pressing block is used in conjunction with the inclined sections and is adapted to the structure of the inclined sections.

[0018] Furthermore, the two splints are vertically arranged on the workbench and opposite to each other.

[0019] On the workbench, a push plate is provided at the large end of the guide trough structure, which is spaced opposite to each other. The push plate moves back and forth to send the material into the guide trough structure and pass through the guide trough structure.

[0020] A heat sealing assembly is provided at an interval on the workbench at the small end of the material guide trough structure. The heat sealing assembly includes two telescopic cylinders arranged upper and lower. A strip-shaped heat sealing plate is connected to the piston rod of the telescopic cylinder. The length direction of the heat sealing plate is parallel to the moving direction of the splint. The workbench is provided with an installation groove for the heat sealing plate located at the lower installation position to pass through.

[0021] The invention has the following beneficial effects compared with the prior art: when in use, the distance between the two clamps is controlled to be appropriately reduced, and at this time, the two pressing blocks move backwards, so that a gap is formed between the pressing blocks and the matching clamps, the packaging bag is placed on the two clamps and the edge of the packaging bag is located between the gap formed by the pressing blocks and the clamps, and then the distance between the two clamps is controlled to be appropriately increased to a preset position (matching the thickness of the paper towels to be packaged). Since the two clamps move backwards, the two pressing blocks move relative to each other, so that the gap between the pressing blocks and the clamps is reduced and the packaging bag can be clamped, thereby making it more convenient to change the distance between the two clamps. At the same time, two pressing blocks used in conjunction can clamp the packaging bag placed outside the two clamps, making the position adjustment between the clamps of the packaging device set by the invention more convenient and the packaging bag can be clamped and fixed, thereby avoiding the problem that a certain thrust when the paper towels enter the packaging bag easily causes the packaging bag placed on the two clamps to slip and separate from the two clamps, making the packaging device of the invention more convenient to operate and having higher stability in clamping the packaging bag. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A top view of the present invention;

[0023] Figure 2 This is a schematic diagram of the cooperation structure between the driven rack and the workbench of the present invention;

[0024] Figure 3 This is a diagram showing the position relationship among the workbench, bracket, mounting plate, and clamping plate of the present invention;

[0025] Figure 4 This is a positional relationship diagram of the gap between the two anti-slip clamping blocks of the present invention;

[0026] Figure 5 This is a diagram showing the positional relationship of the two anti-slip clamping blocks of the present invention when in contact and mating.

[0027] In the above drawings: 1. workbench; 2. clamping plate; 3. mounting plate; 4. pushing cylinder; 5. pushing plate; 6. mounting table; 7. anti-slip clamping block; 8. telescopic cylinder; 9. heat sealing plate; 10. mounting groove; 11. pressing block; 12. driven rack; 13. rotating sleeve; 14. threaded rod; 15. rotating gear; 16. rotating shaft; 17. driving rack; 18. servo cylinder; 19. slide rail; 20. locking bolt; 21. inclined section; 22. vertical section; 23. connecting seat; 24. locking groove; 241. rubber layer; 101. bracket; 71. texture; 72. rubber protrusion; 121. slider; 122. through hole. DETAILED DESCRIPTION

[0028] The technical solutions of the present invention are further described below with reference to the accompanying drawings and embodiments.

[0029] Example 1

[0030] like Figure 1 、 3 As shown, an embodiment of the present invention provides an automated tissue packaging device for tissue production. The device comprises a workbench 1 and two clamping plates 2 arranged opposite each other on the workbench 1 with an adjustable distance between them. The workbench 1 is horizontally mounted and supported by a bracket 101. The two clamping plates 2 are vertically mounted on the workbench 1 and face each other. To facilitate the two clamping plates 2 guiding the tissues and ensuring smooth entry into packaging bags, while also preventing excessive clearance between the packaging bag and the tissues, which could affect the packaging's appearance, the two clamping plates 2 each comprise a vertical section 22 connected to each other and an inclined section 21 inclined toward the other clamping plate 2. The two clamping plates 2 form a tapered trough structure. This trough structure facilitates smooth entry of the tissues into the packaging bag. To ensure smooth entry of the tissues into the packaging bag, the packaging bag is placed over the small end of the trough. A spaced-apart pusher plate 5 is provided on the workbench 1 at the large end of the trough structure. The pusher plate 5 reciprocates to feed the tissues into the trough structure, through the trough structure, and into the packaging bag. This reduces the labor intensity associated with conventional operation. To facilitate movement of the push plate 5, a push cylinder 4 may be provided on a side of the push plate 5 away from the chute structure. When the tissues to be packaged are moved to a predetermined position, the push cylinder 4 activates and drives the push plate 5, feeding the tissues into the chute structure, through the chute structure, and into the packaging bag. The tissues may be manually moved to the predetermined position or transported to the predetermined position by other conveying mechanisms, which are not discussed in this disclosure.

[0031] like Figure 1 、 3As shown, after the tissue paper smoothly enters the packaging bag, it needs to be heat-sealed. In order to achieve heat sealing of the packaging bag after bagging, the present invention is provided with a spaced heat-sealing assembly at the small end of the guide trough structure on the workbench 1. The heat-sealing assembly includes two telescopic cylinders 8 arranged up and down, and the piston rods of the telescopic cylinders 8 are connected to a strip-shaped heat-sealing plate 9. The length direction of the heat-sealing plate 9 is parallel to the moving direction of the splint 2. The workbench 1 is provided with an installation groove 10 for the heat-sealing plate 9 located in the lower installation position to pass through. After the tissue paper is loaded into the packaging bag, the two telescopic cylinders 8 move relative to each other, driving the two heat-sealing plates 9 to move relative to each other to seal the packaging bag. The distance heat sealing principle can be set with reference to the prior art (patent authorization number CN112678277B, named a tissue packaging machine), and the present invention will not elaborate on it.

[0032] like Figure 1 、 3 As shown, the above structure is the basic structure in which the two plywood 2 cooperate to enable the paper towels to enter the packaging bag smoothly. However, in order to enable the paper towels to be smoothly loaded into the packaging bag even if the thickness changes, and also to enable the two plywood 2 to be fixed to the packaging bag, the two plywood 2 of the present invention are respectively connected to the servo cylinders 18 on the away sides, and the two servo cylinders 18 are both fixed to the workbench 1 and the two servo cylinders 18 work simultaneously to change the distance between the two plywood 2. The two servo cylinders 18 are both fixed to the workbench 1, and the servo cylinders 18 are simultaneously extended and retracted to adapt to the bagging operation of paper towels of different thicknesses. In order to enable the plywood 2 with a variable distance setting to be fixed to the matching packaging bag and ensure the smooth progress of the bagging process, the away sides of the two plywood 2 of the present invention are respectively provided with a matching pressing block 11, and the matching pressing block 11 is used in conjunction with the inclined section 21 and is adapted to the structure of the inclined section 21. In order to make the pressing block 11 cooperate with the splint 2 to play the role of fixing the packaging bag, the pressing block 11 is connected to the corresponding splint 2 through a connecting mechanism so that when the two splints 2 are used relative to each other, the two pressing blocks 11 move backwards, and when the two splints 2 move backwards, the two pressing blocks 11 move relative to each other. Specifically, the connecting mechanism includes a driven rack 12 fixed to the pressing block 11, an active rack 17 fixed to the corresponding splint 2 and relatively parallel to the driven rack 12, and at least one rotating gear 15 meshing with the driven rack 12 and the active gear. The active rack 17 is parallel to the moving direction of the two splints 2, the rotating gear 15 is rotationally connected to the workbench 1, and the driven rack 12 is slidingly arranged with the workbench 1. Figure 1As shown, the two splints 2 are horizontally arranged side by side on the workbench 1, the active rack 17 and the driven rack 12 are arranged on the workbench 1 and are perpendicular to the arrangement direction of the splints 2. The present invention provides three rotating racks arranged side by side, the three rotating gears 15 are of the same size, and the rotating gear 15 is rotatably connected to the workbench 1 through the rotating shaft 16. A strip-shaped slide rail 19 is provided on the workbench 1, which is slidably connected to the slider 121 fixed on the driven rack 12. The length direction of the slide rail 19 is consistent with the length direction of the driven rack 12, which facilitates the installation, positioning and smooth sliding of the driven gear on the workbench 1.

[0033] When in use, first, by controlling the telescopic distance of the two servo cylinders 18, the distance between the two splints 2 is appropriately reduced. Under the action of the connecting mechanism, the active rack 17 and the driven rack 12 move in opposite directions, driving the two pressing blocks 11 to move backward, so that a gap is formed between the pressing blocks 11 and the matching splints 2; then, the packaging bag is placed on the two splints 2 and the edge of the packaging bag is located between the gap formed by the pressing blocks 11 and the splints 2, and then the two servo cylinders 18 are controlled to work so that the distance between the two splints 2 is appropriately increased to a preset position (matching the thickness of the paper towels to be packaged). Under the action of the connecting mechanism, the two splints 2 move backward so that The two pressing blocks 11 move relative to each other, so that the gap between the pressing block 11 and the splint 2 is reduced and the packaging bag can be clamped, thereby making it easier to change the distance between the two splints 2. At the same time, two cooperating pressing blocks 11 can clamp the packaging bag arranged outside the two splints 2; then the pushing plate 5 is controlled to work to push the paper towel to be bagged into the packaging bag, and the two heat-sealing plates 9 move relative to each other under the operation of the telescopic cylinder 8 to seal the packaging bag; the two servo cylinders 18 move relative to each other again to increase the gap between the pressing block 11 and the splint 2, which is convenient for unloading the packaging bag after heat sealing, and also convenient for bagging and loading of subsequent packaging bags on the two splints 2.

[0034] The position adjustment between the clamps 2 of the packaging device of the present invention is more convenient and the packaging bag can be clamped and fixed, thereby avoiding the problem that when the paper towel enters the packaging bag, there is a certain thrust that easily causes the packaging bag mounted on the two clamps 2 to slip and separate from the two clamps 2. The packaging device of the present invention is more convenient to operate and has higher stability in clamping the packaging bag.

[0035] Example 2

[0036] like Figure 1 、 4As shown in Figures 5 and 6, to further improve the ability of the pressure block 11 and the clamping plate 2 to secure the packaging bag, this embodiment, based on Example 1, has rubber anti-slip clamping blocks 7 provided on opposite sides of the pressure block 11 and the clamping plate 2. The two anti-slip clamping blocks 7 are provided with serrated patterns 71, and when the two anti-slip clamping blocks 7 are in contact, the two patterns 71 on the two anti-slip clamping blocks 7 engage with each other. The clamping force exerted by the anti-slip clamping blocks 7 and the patterns 71 on the anti-slip clamping blocks 7 can effectively prevent the packaging bag from sliding along the moving direction of the push plate 5, ensuring the effective cooperation between the pressure block 11 and the clamping plate 2 for securing the packaging bag.

[0037] like Figure 1 、 4 As shown in Figures 5 and 6, to further enhance the gripping ability of the pattern 71 on the packaging bag, and taking into account the material of the packaging bag, this embodiment features mutually protruding rubber protrusions 72 on the inner walls of any V-shaped grooves in the pattern 71. The rubber protrusions 72 exert significant friction against the film, increasing the friction between the anti-slip clamping block 7 and the packaging bag, further enhancing the gripping ability of the pressure plate and clamping plate 2 on the packaging bag.

[0038] Example 3

[0039] like Figure 1 、 2 As shown, when the thickness of the paper towels varies significantly, to avoid adjusting the position of the connection mechanism, the position of the pressure block 11 can be appropriately adjusted. This allows the pressure block 11 to achieve a clamping effect with the corresponding clamping plate 2 even when the distance between the clamping plates 2 increases. To this end, this embodiment, based on Example 1, flexibly connects the pressure block 11 to the driven rack 12. Specifically, the pressure block 11 is fixed to a threaded rod 14 parallel to the driven rack 12. The threaded rod 14 is threadedly connected to a rotating sleeve 13 that is rotatably connected to the driven rack 12. External force drives the rotating sleeve 13 to rotate, causing the position of the pressure block 11 and the driven rack 12 to change. The rotating sleeve 13 and the driven rack 12 are rotatably connected via a bearing. During use, external force acting on the rotating sleeve 13 can drive the threaded rod 14 to move. While the position of the clamping plates remains unchanged, the distance between the pressure block 11 and the clamping plates 2 changes. This allows the pressure block 11 and the clamping plates 2 to cooperate and clamp the packaging bag even when the positions of the two clamping plates change.

[0040] like Figure 1 、 2As shown, specifically, to facilitate the installation of the screw rod and the rotating sleeve 13, the driven rack 12 is provided with a through hole 122 arranged along its length. The rotating sleeve 13 is sleeved on the end of the through hole 122 away from the pressing block 11 and is rotatably connected to the through hole 122 via a bearing. The rotating sleeve 13 is arranged co-centering with the through hole 122 and partially extends out of the end of the through hole 122. The threaded rod 14 passes through the through hole 122 and is threadedly connected to the rotating sleeve 13. This defines the installation position of the rotating sleeve 13, the threaded rod 14, and the driven rack 12, making it easier to apply external force to the rotating sleeve 13, thereby driving the threaded rod 14 to move along the length of the driven rack 12.

[0041] like Figure 1 、 2 As shown, when the pressure block 11 does not need to move, the rotating sleeve 13 and the driven rack 12 need to be limited in position. To this end, in this embodiment, a locking assembly is provided between the rotating sleeve 13 and the driven rack 12. The locking assembly includes a locking bolt 20 threadedly connected to the rotating sleeve 13 and an annular locking groove 24 formed in the driven rack 12. The locking bolt 20 is connected to the locking groove 24 to lock the rotating sleeve 13 and the driven rack 12. The locking groove 24 is formed on the driven rack 12 and is arranged around the rotating sleeve 13. The locking bolt 20 passes through the connecting seat 23 fixed on the rotating sleeve 13 and is threadedly connected to the connecting seat 23. A protruding rubber layer 241 is provided on the inner wall of the locking groove 24, so that the locking bolt 20 can be fixed in the locking groove 24 when inserted into the locking groove 24. Therefore, when the pressure block 11 does not need to move, the rotating sleeve 13 and the driven rack 12 can be locked. When the position of the clamping block 11 needs to be adjusted, the locking bolt 20 only needs to be rotated and moved out of the locking groove 24 to unlock the rotating sleeve 13 and the driven rack 12. Then, the rotating sleeve 13 is driven to rotate to drive the threaded rod 14 and the clamping block 11 to move, thereby changing the position of the clamping block 11 on the workbench 1.

[0042] Example 4

[0043] like Figure 1 、 3 As shown, based on Example 1, to ensure that paper towels can smoothly enter the packaging bag during bagging, the workbench 1 is provided with a mounting platform 6, and the mounting platform 6 is provided with a strip-shaped mounting plate 3. The mounting plate 3 is parallel to the workbench 1 and has a gap therebetween. The length direction of the mounting plate 3 is adapted to the installation direction of the material guide chute structure. Two clamping plates 2 are arranged on the mounting plate 3 and slide on the mounting plate 3, and a pusher plate 5 is arranged on the mounting plate 3 and slides along the mounting plate 3. The width of the mounting plate 3 at the small end of the material guide chute structure is smaller than the width of the other end of the mounting plate 3. The arrangement of the mounting plate 3 allows the packaging bag to be placed on the two clamping plates 2 and also placed below the mounting plate 3. When the pusher plate 5 is pushed along the top of the mounting plate 3, the paper towels can be smoothly pushed into the packaging bag.

[0044] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present invention may be modified or replaced by equivalents without departing from the purpose and scope of the technical solutions of the present invention, which should all be included in the scope of the claims of the present invention.

Claims

1. An automated paper towel packaging device for paper towel production, comprising a workbench and two clamping plates disposed opposite each other and with an adjustable distance therebetween, characterized in that: The two splints are respectively provided with a cooperating pressing block on their opposite sides, and the pressing blocks are connected to the corresponding splints through a connecting mechanism so that when the two splints are relatively used, the two pressing blocks move back to back, and when the two splints move back to back, the two pressing blocks move relative to each other; The two splints are connected to servo cylinders on their opposite sides. Both servo cylinders are fixed to the workbench and work simultaneously to change the distance between the two splints. The connecting mechanism includes a driven rack fixed to the pressing block, an active rack fixed to the corresponding clamping plate and relatively parallel to the driven rack, and at least one rotating gear meshing with the driven rack and the active gear, the active rack is parallel to the moving direction of the two clamping plates, the rotating gear is rotatably connected to the workbench, and the driven rack is slidably arranged with the workbench; there are three rotating gears arranged side by side, the three rotating gears are of the same size, and the rotating gears are rotatably connected to the workbench through a rotating shaft, and a strip-shaped slide rail is provided on the workbench that is slidably connected to a slider fixed on the driven rack; The opposite sides of the pressing block and the clamping plate are respectively provided with anti-skid clamping blocks made of rubber, and the two anti-skid clamping blocks are respectively provided with serrated patterns, and when the two anti-skid clamping blocks are in contact, the two patterns on the two anti-skid clamping blocks are interlocked; The inner wall of any "V"-shaped groove of the pattern is provided with rubber protrusions protruding from each other; The two clamping plates each include a vertical section connected to each other and an inclined section inclined toward the other clamping plate, and the two clamping plates form a constricted material guide chute structure, and the pressing block is used in conjunction with the inclined section and is adapted to the structure of the inclined section; The pressing block is movably connected to the driven rack, and the pressing block is fixed on a threaded rod parallel to the driven rack. The threaded rod is threadedly connected to a rotating sleeve rotatably connected to the driven rack. External force drives the rotating sleeve to rotate, driving the position of the pressing block and the driven rack to change; The driven rack is provided with a through hole arranged along its length direction, the rotating sleeve is arranged at one end of the through hole away from the pressing block and is rotatably connected to the through hole, the rotating sleeve is arranged on the same center line as the through hole and partially extends out of the end of the through hole, and the threaded rod passes through the through hole and is threadedly connected to the rotating sleeve; A locking assembly is provided between the rotating sleeve and the driven rack. The locking assembly includes a locking bolt threadedly connected to the rotating sleeve and an annular locking groove formed on the driven rack, wherein the locking bolt is connected to the locking groove to lock the rotating sleeve and the driven rack; The workbench is provided with a mounting platform, and the mounting platform is provided with a strip-shaped mounting plate; the length direction of the mounting plate is adapted to the installation direction of the material guide trough structure, and the width of one end of the mounting plate located at the small end of the material guide trough structure is smaller than the width of the other end of the mounting plate.

2. The automatic paper towel packaging device for paper towel production according to claim 1, characterized in that: The two splints are placed vertically on the workbench and opposite to each other. On the workbench, a push plate is provided at the large end of the guide trough structure, which is spaced opposite to each other. The push plate moves back and forth to send the material into the guide trough structure and pass through the guide trough structure. A heat sealing assembly is provided at an interval on the workbench at the small end of the material guide trough structure. The heat sealing assembly includes two telescopic cylinders arranged upper and lower. A strip-shaped heat sealing plate is connected to the piston rod of the telescopic cylinder. The length direction of the heat sealing plate is parallel to the moving direction of the splint. The workbench is provided with an installation groove for the heat sealing plate located at the lower installation position to pass through.

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