Edge sealing device for paper-plastic composite bag

Abstract

The utility model discloses a paper-plastic compound bag edge sealing device which comprises a fixing frame, a guiding frame, a supporting frame, a heat sealing frame, a pressing frame and a driving module, the edge sealing device can be installed and fixed through the fixing frame, the guiding frame is connected to the fixing frame, the pressing frame is fixed to the guiding frame, the supporting frame is connected to the guiding frame in a sliding mode, and the heat sealing frame is connected to the supporting frame. The driving module is fixed to the fixing frame, the heat sealing frame and the pressing frame can be made to get close to or get away from each other by driving the supporting frame and the guiding frame to slide, during heat sealing work, a paper-plastic composite bag to be subjected to edge sealing is arranged between the pressing frame and the heat sealing frame, and then the driving module drives the supporting frame to make the heat sealing frame and the pressing frame get close to each other. The paper-plastic composite bag is pressed from the two sides of the paper-plastic composite bag, edge sealing is achieved under heat supply of the heat sealing frame, in this way, the paper-plastic composite bag can be prevented from making contact with the heat sealing frame before edge sealing, and therefore the edge sealing quality of the paper-plastic composite bag is improved.

Description

Technical Field

[0001] This utility model relates to the field of composite bag processing technology, specifically to a sealing device for paper-plastic composite bags. Background Technology

[0002] Paper-plastic composite bags, also known as three-in-one composite paper bags, are small bulk containers mainly composed of plastic and kraft paper. The plastic layer typically uses flat woven fabric with polypropylene or polyethylene as the base material, while the kraft paper is made of refined composite kraft paper, featuring high strength, good water resistance, and an attractive appearance. Heat sealing is required during the production of paper-plastic composite bags.

[0003] For example, the patent document with announcement number CN219325585U discloses a paper-plastic composite bag sealing device. The paper-plastic composite bag sealing device drives the lifting plate to move up and down in sequence by rotating the turntable, thereby driving the second pressure roller to squeeze and fix the two sides of the paper-plastic composite bag. Then, by inserting the tooth column into the tooth groove, the rotating rod is limited and fixed, changing the pressure between the second pressure roller and the fixed plate. Finally, it is heat-sealed by the hot plate.

[0004] Although existing sealing devices can heat seal paper-plastic composite bags and adjust the pressure applied to the bags during the sealing process, they require the bags to be placed on a hot plate and pressed down by rollers before heat sealing. This results in the bags receiving excessive heat from the hot plate, causing them to overheat and deform, thus affecting the heat sealing quality. Utility Model Content

[0005] The purpose of this utility model is to overcome the above-mentioned technical deficiencies and propose a paper-plastic composite bag sealing device to solve the technical problem that the existing paper-plastic composite bag sealing device is prone to overheating of the composite bag during the sealing process, resulting in poor sealing quality.

[0006] To achieve the above-mentioned technical objectives, the present invention adopts the following technical solution:

[0007] This utility model provides a sealing device for paper-plastic composite bags, including:

[0008] Fixture;

[0009] Guide frame, connected to the fixed frame;

[0010] The support frame is slidably connected to the guide frame;

[0011] A heat-sealing frame, connected to the support frame;

[0012] A pressing frame, fixed to the guide frame and opposite to the heat sealing frame, forms a receiving space between the pressing frame and the heat sealing frame; and

[0013] A drive module, fixed to the fixed frame and connected to the support frame, is used to drive the support frame to slide, so that the pressing frame and the heat sealing frame move closer or further apart.

[0014] In some embodiments, the guide frame is slidably connected to the fixed frame, and the drive module includes a drive component and a transmission component. The drive component is fixed to the fixed frame and connected to the support frame, and is used to drive the support frame to slide. The transmission component connects the support frame and the guide frame, and is used to drive the guide frame to slide in the opposite direction to the sliding direction of the support frame through the sliding of the support frame.

[0015] In some embodiments, the transmission assembly includes a rotating arm, a first connecting rod, and a second connecting rod. The rotating arm is rotatably connected to the fixed frame. The two ends of the first connecting rod are respectively hinged to the support frame and one end of the rotating arm. The two ends of the second connecting rod are respectively hinged to the guide frame and the other end of the rotating arm.

[0016] In some embodiments, the guide frame includes two opposing guide rods, which are slidably connected to both ends of the fixed frame.

[0017] In some embodiments, the support frame includes a sliding seat and a support plate, with the two ends of the sliding seat slidably connected to the two guide rods respectively, the support plate being fixed to the sliding seat, and the heat sealing frame being fixed to the support plate.

[0018] In some embodiments, the heat-sealing frame includes a mounting strip, a heat-sealing strip, and a plurality of springs. The mounting strip is located on the side of the support frame near the pressing frame. The two ends of the springs are respectively connected to the support frame and the mounting strip. The heat-sealing strip is fixed to the side of the mounting strip near the pressing frame.

[0019] In some embodiments, the heat-sealing frame further includes a guide shaft, one end of which is fixed to the mounting strip, and the other end of which is slidably connected to the support frame.

[0020] In some embodiments, the pressing frame includes a fixed plate, a first adjusting screw, and a pressing strip. The fixed plate is fixed to the guide frame, and the pressing strip is located on the side of the fixed plate near the heat sealing frame. The first adjusting screw is connected to the fixed plate and the pressing strip to adjust the distance between the pressing strip and the heat sealing frame.

[0021] In some embodiments, the pressing frame further includes a connecting frame and two limiting plates, the two limiting plates being located on both sides of the pressing strip, one end of the connecting frame being connected to the two limiting plates, and the other end of the connecting frame being connected to the fixing plate.

[0022] In some embodiments, the pressing frame further includes a second adjusting screw, which connects the fixing plate and the connecting frame to adjust the height of the limiting plate.

[0023] Compared with the prior art, the paper-plastic composite bag sealing device provided by this utility model is equipped with a fixed frame, a guide frame, a support frame, a heat sealing frame, a pressing frame, and a drive module. The sealing device can be installed and fixed by the fixed frame, the guide frame is connected to the fixed frame, and the pressing frame is fixed to the guide frame, so it can move by sliding the guide frame. The support frame is slidably connected to the guide frame, and the heat sealing frame is connected to the support frame, so it can move by sliding the support frame. The drive module is fixed to the fixed frame, and by driving the support frame and the guide frame to slide, the heat sealing frame and the pressing frame can be moved closer to or further away. During the heat sealing of paper-plastic composite bags, the paper-plastic composite bags to be sealed are conveyed to a space between the pressing frame and the heat sealing frame, which avoids the paper-plastic composite bags from contacting the heat sealing frame before heat sealing. Then, the drive module drives the support frame to bring the heat sealing frame and the pressing frame closer to each other, and presses the paper-plastic composite bags from both sides. Under the heat supply of the heat sealing frame, the edges are sealed. In this way, the paper-plastic composite bags can be sealed while avoiding contact with the heat sealing frame before sealing, thereby improving the sealing quality of the paper-plastic composite bags. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the sealing device for paper-plastic composite bags provided in this embodiment of the utility model;

[0025] Figure 2 This is a front view of the paper-plastic composite bag sealing device provided in this embodiment of the utility model.

[0026] Labels for each item in the figure:

[0027] 10—Fixed frame; 20—Guide frame; 21—Guide rod

[0028] 30—Support frame; 31—Sliding seat; 32—Support plate

[0029] 40—Heat-sealing frame; 41—Installation strip; 42—Heat-sealing strip

[0030] 43—Spring; 44—Guide shaft; 50—Pressing bracket

[0031] 51—Fixed plate; 52—First adjusting screw; 53—Pressing strip

[0032] 54—Connecting bracket 55—Limiting plate 56—Second adjusting screw

[0033] 60—Drive module; 61—Drive component; 62—Transmission assembly

[0034] 621—Rotating arm; 622—First link; 623—Second link

[0035] a—accommodation space. Detailed Implementation

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0037] To address the technical problem that existing paper-plastic composite bag sealing devices easily cause overheating of the composite bag during the sealing process, resulting in poor sealing quality, this utility model provides a paper-plastic composite bag sealing device that improves the sealing quality of the paper-plastic composite bag by preventing the paper-plastic composite bag from coming into contact with the heat sealing frame before sealing.

[0038] It should be noted that the paper-plastic composite bag sealing device described in this utility model is used for, but not limited to, sealing paper-plastic composite bags. For ease of explanation, this utility model only uses the application of the paper-plastic composite bag sealing device to sealing paper-plastic composite bags as an example. The principle of the paper-plastic composite bag sealing device applied to sealing other types of composite bags is essentially the same as that applied to sealing paper-plastic composite bags, and will not be described in detail here.

[0039] The paper-plastic composite bag sealing device provided in this embodiment of the utility model, such as Figure 1 and 2 As shown, the device includes a fixed frame 10, a guide frame 20, a support frame 30, a heat sealing frame 40, a pressing frame 50, and a drive module 60. The guide frame 20 is slidably connected to the fixed frame 10; the support frame 30 is connected to the guide frame 20; the heat sealing frame 40 is connected to the support frame 30; the pressing frame 50 is fixed to the guide frame 20 and opposite to the heat sealing frame 40, forming a receiving space a between the pressing frame 50 and the heat sealing frame 40; the drive module 60 is fixed to the fixed frame 10 and connected to the support frame 30, and is used to drive the support frame 30 to slide, so that the pressing frame 50 and the heat sealing frame 40 move closer to or further away from each other.

[0040] Specifically, the paper-plastic composite bag sealing device comprises a fixed frame 10, a guide frame 20, a support frame 30, a heat-sealing frame 40, a pressing frame 50, and a drive module 60. The sealing device can be installed and fixed via the fixed frame 10. The guide frame 20 is connected to the fixed frame 10, and the pressing frame 50 is fixed to the guide frame 20, thus allowing movement via the sliding of the guide frame 20. The support frame 30 is slidably connected to the guide frame 20, and the heat-sealing frame 40 is connected to the support frame 30, thus allowing movement via the sliding of the support frame 30. The drive module 60 is fixed to the fixed frame 10. By driving the support frame 30 and the guide frame 20 to slide, the heat-sealing frame 40 and the pressing frame 50 can be moved. When the heat sealing process of the paper-plastic composite bag is carried out, the paper-plastic composite bag to be sealed is conveyed to the receiving space a between the pressing frame 50 and the heat sealing frame 40, which can avoid the paper-plastic composite bag from contacting the heat sealing frame 40 before heat sealing. Then, the drive module 60 drives the support frame 30 to bring the heat sealing frame 40 and the pressing frame 50 closer to each other and press the paper-plastic composite bag from both sides. Under the heat supply of the heat sealing frame 40, the edge sealing is achieved. In this way, the paper-plastic composite bag can be sealed at the same time, and the paper-plastic composite bag can avoid contact with the heat sealing frame 40 before sealing, thereby improving the sealing quality of the paper-plastic composite bag.

[0041] Understandably, the mounting bracket 10 can be any frame structure that can be fixed on the conveyor table of the paper-plastic composite bag.

[0042] Understandably, the fixed frame 10 can be equipped with a sliding groove, and the guide frame 20 can be configured as a slide rail to achieve a sliding connection with the fixed frame 10.

[0043] Understandably, the guide frame 20 can be connected to the fixed frame 10 in a fixed or sliding connection or other connection forms.

[0044] In one embodiment, such as Figure 1 and 2 As shown, the guide frame 20 includes two oppositely arranged guide rods 21, which are slidably connected to both ends of the fixed frame 10. Specifically, the guide frame 20 achieves a sliding connection with the fixed frame 10 by providing two guide rods 21 that engage with guide holes at both ends of the fixed frame 10.

[0045] Understandably, the support frame 30 can be any frame structure that can be slidably connected to the guide rod 21.

[0046] In one embodiment, such as Figure 1 and 2As shown, the support frame 30 includes a sliding seat 31 and a support plate 32. The two ends of the sliding seat 31 are slidably connected to two guide rods 21, respectively. The support plate 32 is fixed to the sliding seat 31, and the heat sealing frame 40 is fixed to the support plate 32. Specifically, the support frame 30 achieves stable sliding along the guide rods 21 by sleeved with the sliding seat 31, and the support plate 32 provides support for the hot air frame.

[0047] Understandably, the hot air frame can be a support rod and a heat sealing block fixed on the support rod. Heat sealing is achieved by heating the heat sealing block and pressing the pressing frame 50.

[0048] In one embodiment, such as Figure 1 and 2 As shown, the heat-sealing frame 40 includes a mounting strip 41, a heat-sealing strip 42, and several springs 43. The mounting strip 41 is located on the side of the support frame 30 near the pressing frame 50. The two ends of the springs 43 are connected to the support frame 30 and the mounting strip 41, respectively. The heat-sealing strip 42 is fixed to the side of the mounting strip 41 near the pressing frame 50. Specifically, the mounting strip 41 can stabilize the heat-sealing strip 42, and the springs 43 can provide support for the mounting strip 41. During heat sealing, the heat-sealing strip 42 presses against both sides of the paper-plastic composite bag with the pressing frame 50, and heats the paper-plastic composite bag during the pressing process, thereby sealing the edges of the paper-plastic composite bag. The springs 43 can adaptively adjust the pressing force between the heat-sealing strip 42 and the pressing frame 50, thereby preventing the paper-plastic composite bag from overheating and breaking.

[0049] In this embodiment, as Figure 1 and 2 As shown, the mounting strip 41 is provided with a mounting groove, and the hot air strip is fixed to the mounting groove.

[0050] In one embodiment, such as Figure 1 and 2 As shown, the heat-sealing frame 40 also includes a guide shaft 44, one end of which is fixed to the mounting strip 41, and the other end of which is slidably connected to the support frame 30. Specifically, the guide shaft 44, through its slidable connection to the support frame 30, can provide guidance and limit for the mounting strip 41 when the spring 43 is compressed, thereby keeping the mounting strip 41 stable.

[0051] Understandably, the pressing frame 50 can be a pressure roller. When performing the sealing work, the pressure roller moves along the sealing position of the paper-plastic composite bag, thereby cooperating with the hot air strip to achieve sealing. The pressing frame 50 can also be any pressing component such as a pressure roller that can press the sealing position along the sealing position of the paper-plastic composite bag.

[0052] In one embodiment, such as Figure 1 and 2As shown, the pressing frame 50 includes a fixed plate 51, a first adjusting screw 52, ​​and a pressing strip 53. The fixed plate 51 is fixed to the guide frame 20, and the pressing strip 53 is located on the side of the fixed plate 51 near the heat sealing frame 40. The first adjusting screw 52 connects the fixed plate 51 and the pressing strip 53 to adjust the distance between the pressing strip 53 and the heat sealing frame 40. Specifically, the fixed plate 51 connects and fixes the pressing frame 50 to the guide frame 20, and the first adjusting screw 52 stabilizes the pressing strip 53. During the sealing process, the pressing strip 53, in cooperation with the heat sealing strip 42, presses both sides of the sealing position of the paper-plastic composite bag to seal the edge. The first adjusting screw 52 can adjust the height of the pressing strip 53, thereby adjusting the pressing force exerted by the pressing strip 53 on the paper-plastic composite bag to adapt to the sealing of paper-plastic composite bags of different thicknesses.

[0053] In this embodiment, one end of the first adjusting screw 52 is threaded to the fixed plate 51, and the other end is rotatably connected to the pressing strip 53. By turning the first adjusting screw 52, ​​the pressing strip 53 can be driven to rise and fall, thereby adjusting the height of the pressing strip 53.

[0054] In one embodiment, such as Figure 1 and 2 As shown, the pressing frame 50 also includes a connecting frame 54 and two limiting plates 55. The two limiting plates 55 are located on both sides of the pressing strip 53. One end of the connecting frame 54 is connected to the two limiting plates 55, and the other end of the connecting frame 54 is connected to the fixing plate 51. Specifically, by being set on both sides of the pressing strip 53, the two limiting plates 55 can limit the sealing of the paper-plastic composite bag by slightly pressing on both sides of the sealing position, thereby ensuring the sealing quality of the paper-plastic composite bag.

[0055] In this embodiment, during the edge sealing process, the height of the two limiting plates 55 is slightly higher than the height of the pressing strip 53.

[0056] In one embodiment, such as Figure 1 and 2 As shown, the pressing frame 50 also includes a second adjusting screw 56, which connects the fixing plate 51 and the connecting frame 54 to adjust the height of the limiting plate 55. Specifically, the second adjusting screw 56 can adjust the height of the two limiting plates 55, thereby adjusting their relative height to the pressing strip 53 to accommodate the limiting of paper-plastic composite bags of different thicknesses, and to adaptively adjust the pressing force on the paper-plastic composite bag.

[0057] In this embodiment, one end of the second adjusting screw 56 is threaded to the fixed plate 51, and the other end is rotatably connected to the connecting frame 54. By turning the second adjusting screw 56, the connecting frame 54 can be raised and lowered, thereby adjusting the height of the two limiting plates 55.

[0058] Understandably, the drive module 60 can be two drive devices that are respectively connected to the support frame 30 and the guide frame 20.

[0059] In one embodiment, such as Figure 1 and 2 As shown, the drive module 60 includes a drive component 61 and a transmission assembly 62. The drive component 61 is fixed to the fixed frame 10 and connected to the support frame 30, and is used to drive the support frame 30 to slide. The transmission assembly 62 connects the support frame 30 and the guide frame 20, and is used to drive the guide frame 20 to slide in the opposite direction to the sliding direction of the support frame 30 through the sliding of the support frame 30. Specifically, when the drive component 61 drives the support frame 30 to slide toward the paper-plastic composite bag, the support frame 30 drives the guide rod 21 to slide synchronously in the opposite direction under the transmission of the transmission assembly 62, so that the pressing frame 50 moves synchronously toward the paper-plastic composite bag. Under the transmission of the transmission assembly 62, the relative sliding of the guide frame 20 and the support frame 30 can be achieved by only one drive component 61, thereby effectively simplifying the structure of the drive module 60 and reducing the assembly cost of the sealing device.

[0060] In this embodiment, the driving component 61 is a cylinder.

[0061] Understandable, such as Figure 1 and 2 As shown, the transmission component 62 can be a gear and two racks meshing on both sides of the gear. The two racks are fixed to the support frame 30 and the guide frame 20 respectively. When the support frame 30 drives the gear to rotate through one of the racks, the gear can drive the guide frame 20 to slide in the opposite direction through the other rack.

[0062] In one embodiment, such as Figure 1 and 2 As shown, the transmission assembly 62 includes a rotating arm 621, a first connecting rod 622, and a second connecting rod 623. The rotating arm 621 is rotatably connected to the fixed frame 10. The two ends of the first connecting rod 622 are respectively hinged to the support frame 30 and one end of the rotating arm 621. The two ends of the second connecting rod 623 are respectively hinged to the guide frame 20 and the other end of the rotating arm 621. Specifically, when the driving member 61 slides towards the paper-plastic composite bag via the drive rod support frame 30, the support frame 30 pulls up the first connecting rod 622. The first connecting rod 622 drives the rotating arm 621 to rotate. When the rotating arm 621 rotates, it drives the second connecting rod 623 to move downward. The guide frame 20 slides downward under the action of the second connecting rod 623, ultimately driving the pressing frame 50 to move downward towards the paper-plastic composite bag, thus realizing the relative movement between the guide frame 20 and the support frame 30.

[0063] To better understand this utility model, the following is combined with... Figures 1 to 2 The technical solution of this utility model is described in detail below:

[0064] During the sealing of paper-plastic composite bags, the paper-plastic composite bag to be sealed is conveyed to the receiving space a between the pressing frame 50 and the heat sealing frame 40. The driving component 61 is activated, causing the support frame 30 to slide upward toward the paper-plastic composite bag until the heat sealing strip 42 is in contact with the lower side of the sealing position of the paper-plastic composite bag. At the same time, during the sliding process of the support frame 30, the first connecting rod 622 is pulled upward. The first connecting rod 622 drives the rotating arm 621 to rotate. When the rotating arm 621 rotates, it drives the second connecting rod to move downward. The guide frame 20 slides downward under the action of the second connecting rod 623, and finally drives the pressing frame 50 to move downward toward the paper-plastic composite bag, so that the pressing strip 53 is in contact with the sealing position of the paper-plastic composite bag. Together with the heat sealing strip 42, it squeezes the upper and lower sides of the sealing position of the paper-plastic composite bag to seal the edge of the paper-plastic composite bag. This effectively ensures the sealing quality while sealing the paper-plastic composite bag.

[0065] The specific embodiments of this utility model described above do not constitute a limitation on the scope of protection of this utility model. Any other corresponding changes and modifications made based on the technical concept of this utility model should be included within the scope of protection of the claims of this utility model.

Claims

1. A sealing device for paper-plastic composite bags, characterized in that, include: Fixture; Guide frame, connected to the fixed frame; The support frame is slidably connected to the guide frame; A heat-sealing frame, connected to the support frame; The pressing frame is fixed to the guide frame and is opposite to the heat sealing frame, and a receiving space is formed between the pressing frame and the heat sealing frame; as well as A drive module, fixed to the fixed frame and connected to the support frame, is used to drive the support frame to slide, so that the pressing frame and the heat sealing frame move closer or further apart.

2. The paper-plastic composite bag edge sealing device according to claim 1, characterized by The guide frame is slidably connected to the fixed frame. The drive module includes a drive component and a transmission assembly. The drive component is fixed to the fixed frame and connected to the support frame, and is used to drive the support frame to slide. The transmission assembly connects the support frame and the guide frame, and is used to drive the guide frame to slide in the opposite direction to the sliding direction of the support frame through the sliding of the support frame.

3. The paper-plastic composite bag edge sealing device according to claim 2, characterized by The transmission assembly includes a rotating arm, a first connecting rod, and a second connecting rod. The rotating arm is rotatably connected to the fixed frame. The two ends of the first connecting rod are respectively hinged to the support frame and one end of the rotating arm. The two ends of the second connecting rod are respectively hinged to the guide frame and the other end of the rotating arm.

4. The paper-plastic composite bag edge sealing device according to any one of claims 1 to 3, characterized in that, The guide frame includes two oppositely arranged guide rods, which are slidably connected to both ends of the fixed frame.

5. The paper-plastic composite bag edge sealing device according to claim 4, characterized in that, The support frame includes a sliding seat and a support plate. The two ends of the sliding seat are slidably connected to the two guide rods respectively. The support plate is fixed to the sliding seat, and the heat sealing frame is fixed to the support plate.

6. The paper-plastic composite bag edge sealing device according to any one of claims 1 to 3, characterized in that, The heat-sealing frame includes a mounting strip, a heat-sealing strip, and several springs. The mounting strip is located on the side of the support frame near the pressing frame. The two ends of the springs are respectively connected to the support frame and the mounting strip. The heat-sealing strip is fixed to the side of the mounting strip near the pressing frame.

7. The paper-plastic composite bag edge sealing device according to claim 6, characterized by The heat sealing frame also includes a guide shaft, one end of which is fixed to the mounting strip, and the other end of which is slidably connected to the support frame.

8. The paper-plastic composite bag edge sealing device according to any one of claims 1 to 3, characterized in that, The pressing frame includes a fixed plate, a first adjusting screw, and a pressing strip. The fixed plate is fixed to the guide frame, and the pressing strip is located on the side of the fixed plate near the heat sealing frame. The first adjusting screw is connected to the fixed plate and the pressing strip to adjust the distance between the pressing strip and the heat sealing frame.

9. The paper-plastic composite bag edge sealing device according to claim 8, characterized by The pressing frame also includes a connecting frame and two limiting plates. The two limiting plates are located on both sides of the pressing strip. One end of the connecting frame is connected to the two limiting plates, and the other end of the connecting frame is connected to the fixing plate.

10. The paper-plastic composite bag edge sealing device according to claim 9, characterized by The pressing frame also includes a second adjusting screw, which connects the fixing plate and the connecting frame to adjust the height of the limiting plate.

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