M-shaped packaging bag heat sealing device

Abstract

The utility model discloses an M-shaped packaging bag heat sealing device which comprises a heat sealing clamping mechanism arranged on a suspension support, the heat sealing clamping mechanism comprises a fixing frame, two inclined walls inclining downwards are arranged at the bottom of the fixing frame in a bilateral symmetry mode, and linear sliding rails are arranged on the inclined walls in the inclining direction of the inclined walls. Clamping arms are connected to sliding blocks on the linear sliding rails through connecting plates, heat sealing plates are fixedly arranged at the clamping ends of the clamping arms, and each heat sealing plate is of an arc-shaped structure. A telescopic cylinder is vertically arranged on the fixed frame, the telescopic end of the telescopic cylinder is connected with a push block, and the clamping arms on the two sides are arranged in a bilateral symmetry mode along the push block. The clamping arms are hinged with the push block through connecting rods and pin shafts; a linear driving mechanism capable of driving the heat-sealing clamping mechanism to horizontally move is arranged on the suspension bracket; the heat sealing device has the advantages that the heat sealing plate exerts pressure on the packaging bag evenly and stably, heat sealing is firm and tight, the heat sealing plate is of an arc-shaped structure, a heat sealing line at the heat sealing position of the packaging bag is of an arc-shaped edge sealing structure, and the sealing strength of the packaging bag is improved.

Description

Technical Field

[0001] This utility model relates to the field of heat sealing technology for packaging bags, specifically to a heat sealing device for M-type packaging bags. Background Technology

[0002] In flour production and packaging, M-type packaging bags are widely used due to their unique structural design, which effectively prevents leakage of flour during storage and transportation. The irregular shape of the sealing area of ​​an M-type packaging bag requires uniform pressure during heat sealing to ensure a good seal across the entire sealing area. Patent publication number CN222040946U discloses a packaging bag sealing device, specifically disclosing a first and second swing arm hinged to each other on a support. Both the first and second swing arms have heat-sealing blocks. The other end of the first swing arm is hinged to a first transmission arm; the other end of the second swing arm is hinged to a second transmission arm; the second transmission arm is hinged to the first transmission arm on a movable shaft. A power source can drive the movable shaft to move back and forth, but due to the first… The swing of the first and second swing arms requires transmission through the movable shaft, transmission arm, and hinge shaft. The first and second swing arms are prone to wobbling, and since the heat sealing plates are both straight, the heat sealing line at the packaging bag seal is a straight edge seal shape. This makes it impossible to ensure a tight fit between the heat sealing plate and the packaging bag seal, resulting in uneven pressure applied by the heat sealing plate to the packaging bag, incomplete heat sealing, and poor heat sealing effect. Furthermore, because the heat sealing line at the packaging bag seal is a straight edge seal shape, the impact force of the items on the inner seal edge of the packaging bag is large during transportation or circulation, which can easily lead to situations such as bag bursting, air leakage, and material leakage. Utility Model Content

[0003] The technical problem to be solved by this utility model is to overcome the existing defects and provide an M-type packaging bag heat sealing device. The heat sealing plate fits tightly with the sealing edge of the packaging bag, and the heat sealing plate applies pressure to the packaging bag evenly and stably, resulting in a firm and tight heat seal with good heat sealing effect. The heat sealing plate has an arc-shaped structure, which makes the heat sealing line at the heat sealing edge of the packaging bag an arc-shaped edge seal structure, reducing the impact of the item on the inner sealing edge of the packaging bag, increasing the sealing strength of the packaging bag, and making it less likely to cause bag bursting, air leakage, or material leakage. This can effectively solve the problems in the background technology.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an M-type packaging bag heat-sealing device, comprising a heat-sealing clamping mechanism mounted on a suspension bracket, the heat-sealing clamping mechanism comprising a fixed frame, two downwardly inclined walls symmetrically arranged on the bottom of the fixed frame, the two inclined walls having a V-shaped structure, linear slide rails provided on the inclined walls along their inclined direction, sliders provided on the linear slide rails, and clamping arms connected to the sliders via connecting plates, the clamping ends of the clamping arms being fixedly provided with heat-sealing plates, the heat-sealing plates having an arc-shaped structure; a telescopic cylinder is vertically mounted on the fixed frame, the telescopic end of the telescopic cylinder facing downward and connected to a push block, and the clamping arms on both sides being symmetrically arranged on the left and right sides along the push block; the clamping arms are all hinged to the push block via connecting rods and pins, and the hinge hole at one end of the connecting rod is a long slot structure; a linear drive mechanism is provided on the suspension bracket to drive the heat-sealing clamping mechanism to move horizontally.

[0005] Furthermore, the suspension bracket is a cuboid frame structure, and the linear drive mechanism on the suspension bracket includes a transmission screw between its left and right side frames, with transmission screws rotatably mounted at both ends between the left and right side frames. The suspension bracket is equipped with a drive motor that can drive the transmission screws to rotate. The fixed frame is provided with screw nuts at the positions corresponding to the transmission screws, and the screw nuts are all rolledly connected to the corresponding transmission screws. A photoelectric switch sensor is provided at the bottom of the suspension bracket on one side of the heat-sealing clamping mechanism.

[0006] Furthermore, the telescopic cylinder's telescopic rod is fixedly connected to a connecting sleeve coaxially arranged therewith. An annular groove is formed at the end of the outer circumference of the connecting sleeve, and an external thread is formed at the annular groove. A screw rod coaxially arranged with the connecting sleeve is connected to the push block. The end of the screw rod away from the push block is nested inside the connecting sleeve, and a locking nut is provided on the screw rod. The inner hole of the locking nut has a stepped hole structure, and the inner wall with the larger inner diameter of the locking nut has an internal thread one, while the inner wall with the smaller inner diameter of the locking nut has an internal thread two. The locking nut is threaded onto the screw rod through the internal thread two, and the screw rod is locked by connecting and locking with the external thread of the connecting sleeve through the internal thread one of the locking nut.

[0007] Furthermore, a guide sleeve is provided on the fixed frame around the connecting sleeve, and the connecting sleeve is slidably nested in the guide sleeve along its axial direction.

[0008] Furthermore, the clamping arm has an L-shaped plate structure, with the inner end face of the horizontal plate of the clamping arm serving as the clamping end. Each clamping end of the clamping arm has an arc-shaped groove, and the heat-sealing plate is nested in the arc-shaped groove and fixedly connected to the clamping end of the clamping arm by screws. The arc-shaped groove also has a mounting hole, in which a temperature sensor is installed, and the temperature measuring end of the temperature sensor is in contact with the back of the heat-sealing plate.

[0009] Furthermore, an elastic pad is fixedly provided on the clamping end of the clamping arm above the arc-shaped groove, and a pressure sensor is provided on one side of the elastic pad.

[0010] Compared with the prior art, the beneficial effects of this utility model are as follows: This M-type packaging bag heat sealing device is fixedly connected to the clamping arm by a slider that slides on the inclined wall of the fixed frame, and the push block is movably connected to the clamping arm through a connecting rod, forming a stable pressure clamping mechanism. The heat sealing plate fits tightly with the sealing end of the packaging bag, and with the buffering effect of the elastic pad, the heat sealing plate applies pressure to the packaging bag evenly and smoothly, resulting in a firm and tight heat seal and a good heat sealing effect. Moreover, the heat sealing plate has an arc-shaped structure, which makes the heat sealing line at the heat sealing end of the packaging bag an arc-shaped edge sealing structure. The angle between the heat sealing edge of the M-type packaging bag and the side end of the packaging bag is an obtuse angle. Compared with the traditional straight heat sealing line, it reduces the impact force of the items on the inner sealing edge of the packaging bag during transportation or circulation, increases the sealing strength of the packaging bag, and makes it less likely for the bag to burst, leak air, or leak material. Attached Figure Description

[0011] Figure 1 This is a side view of the present invention;

[0012] Figure 2 This is a front view of the heat-sealing clamping mechanism of this utility model;

[0013] Figure 3 This is a schematic diagram of the connection structure between the heat-sealing plate and the clamping arm of this utility model;

[0014] Figure 4 This is an isometric drawing of the heat-sealing plate of this utility model;

[0015] Figure 5 This is a partial sectional view of the heat-sealing clamping mechanism of this utility model;

[0016] Figure 6 This is a schematic diagram of the connection structure between the push block and the telescopic cylinder of this utility model;

[0017] Figure 7 This is a cross-sectional view of the locking nut of this utility model;

[0018] Figure 8 This is a schematic diagram of the side seal shape of the heat-sealed packaging bag of this utility model.

[0019] In the diagram: 1. Suspension bracket; 2. Heat-sealing clamping mechanism; 21. Fixed frame; 211. Inclined wall; 22. Linear slide rail; 23. Slider; 24. Connecting plate; 25. Guide sleeve; 26. Lead screw nut; 3. Clamping arm; 31. Arc groove; 32. Temperature sensor; 33. Elastic pad; 331. Pressure sensor; 4. Heat-sealing plate; 5. Push block; 51. Screw; 52. Locking nut; 521. Internal thread one; 522. Internal thread two; 6. Connecting rod; 7. Telescopic cylinder; 8. Connecting sleeve; 81. Annular groove; 9. Transmission lead screw; 10. Drive motor; 11. Photoelectric switch sensor. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model. Example

[0021] Please see Figure 1-8 This utility model provides a technical solution: an M-type packaging bag heat sealing device, including a heat sealing clamping mechanism 2 provided on a suspension bracket 1. The suspension bracket 1 is a cuboid frame structure. Both ends of the suspension bracket 1 are rotatably provided with transmission screws 9 between the left and right side frames. The suspension bracket 1 is provided with a drive motor 10 that can drive the transmission screws 9 to rotate.

[0022] The heat-sealing clamping mechanism 2 includes a fixed frame 21. Each fixed frame 21 is provided with a screw nut 26 at a position corresponding to the transmission screw 9, and the screw nut 26 is rolledly connected to the corresponding transmission screw 9. The bottom of the fixed frame 21 is provided with two downwardly inclined walls 211 symmetrically arranged on the left and right. The two inclined walls 211 are V-shaped. Each inclined wall 211 is provided with a linear slide rail 22 along its inclined direction. Each linear slide rail 22 is provided with a slider 23, and each slider 23 is connected to a clamping arm 3 through a connecting plate 24. Each clamping end of the clamping arm 3 is fixed with a heat-sealing plate 4, and the heat-sealing plate 4 is an arc-shaped structure.

[0023] The clamping arm 3 is an L-shaped plate structure. The inner end face of the horizontal plate of the clamping arm 3 is the clamping end. Each clamping end of the clamping arm 3 is provided with an arc-shaped groove 31. The heat-sealing plate 4 is nested in the arc-shaped groove 31 and fixedly connected to the clamping end of the clamping arm 3 by screws. The arc-shaped groove 31 is also provided with a mounting hole 1. A temperature sensor 32 is provided in the mounting hole 1, and the temperature measuring end of the temperature sensor 32 is in contact with the back of the heat-sealing plate 4.

[0024] The fixed frame 21 is vertically provided with a telescopic cylinder 7. The telescopic end of the telescopic cylinder 7 faces downward and is connected to a push block 5. The clamping arms 3 on both sides are symmetrically arranged along the push block 5. The clamping arms 3 are all hinged to the push block 5 through a connecting rod 6 and a pin. The hinge hole at one end of the connecting rod 6 is a long slot hole structure.

[0025] The telescopic cylinder 7 has a telescopic rod fixedly connected to a connecting sleeve 8 coaxially arranged therewith. The end of the outer circumference of the connecting sleeve 8 has an annular groove 81, and the annular groove 81 has an external thread. The push block 5 is connected to a screw 51 coaxially arranged with the connecting sleeve 8. The end of the screw 51 away from the push block 5 is nested in the connecting sleeve 8, and the screw 51 is provided with a locking nut 52. The inner hole of the locking nut 52 is a stepped hole structure, and the inner wall with the larger inner diameter of the locking nut 52 is provided with an internal thread 521, and the inner wall with the smaller inner diameter of the locking nut 52 is provided with an internal thread 522. The locking nut 52 is threadedly connected to the screw 51 through the internal thread 522, and the screw 51 is locked by the internal thread 521 of the locking nut 52 and the external thread of the connecting sleeve 8.

[0026] The bottom of the suspension bracket 1 is provided with a photoelectric switch sensor 11 on one side of the heat-sealing clamping mechanism 2;

[0027] Working principle:

[0028] The suspension bracket 1 is installed on the external packaging equipment. The packaging equipment is equipped with a conveying device for conveying M-type packaging bags at the lower end of the heat-sealing clamping mechanism 2. When the packaging bag is conveyed to the position of the heat-sealing clamping mechanism 2, the photoelectric switch sensor 11 on the suspension bracket 1 detects the packaging bag, the conveying device stops working, the heat-sealing plate 4 is heated, and the push block 5 is pushed up by the retraction cylinder 7. When the push block 5 rises, it pulls the clamping arms 3 on both sides closer to each other through the connecting rod 6. At the same time, the slider 23 moves along the linear slide rail 22, so that the heat-sealing plate 4 clamps the packaging bag for heat sealing, and the temperature of the heat-sealing plate 4 is detected by the temperature sensor 32. After the packaging bag is heat-sealed, the retraction cylinder 7 extends and pushes the push block 5 down, so that the clamping arms 3 on both sides and the heat-sealing plate 4 move away from each other. The heat-sealed packaging bag is conveyed by the conveying device, and the heat sealing of the next packaging bag is continued according to the above steps.

[0029] When it is necessary to adjust the clamping force of the heat sealing plate 4 on the packaging bag, the internal thread 521 of the locking nut 52 is disengaged from the external thread of the connecting sleeve 8 by screwing the locking nut 52. The relative distance between the push block 5 and the connecting sleeve 8 is adjusted. After the position of the push block 5 is adjusted, the locking nut 52 is screwed on so that the internal thread 521 of the locking nut 52 is connected and locked with the external thread of the connecting sleeve 8, thereby adjusting the clamping force of the heat sealing plate 4 on the packaging bag.

[0030] When heat-sealing different types of packaging bags, the horizontal position of the heat-sealing clamping mechanism 2 can be adjusted by driving the transmission screw 9 to rotate through the drive motor 10, thereby adjusting the heat-sealing position of the heat-sealing plate 4 and ensuring that the heat-sealing plate 4 is accurately aligned with the heat-sealing opening of the packaging bag.

[0031] Furthermore, a guide sleeve 25 is provided on the fixed frame 21 around the connecting sleeve 8, and the connecting sleeve 8 is slidably nested in the guide sleeve 25 along its axial direction; the guide sleeve 25 guides the axial movement of the connecting sleeve 8.

[0032] Furthermore, an elastic pad 33 is fixedly provided on the clamping end of the clamping arm 3 above the arc-shaped groove 31, and a pressure sensor 331 is provided on one side of the elastic pad 33. When the clamping arms 3 approach each other to make the heat sealing plate 4 clamp the packaging bag for heat sealing, the clamping arms 3 on both sides first clamp the packaging bag through the elastic pad 33, and then the heat sealing plate 4 clamps and heat seals the packaging bag. The elastic pad 33 plays a buffering role in clamping the packaging bag by the heat sealing plate 4, and the pressure sensor 331 detects the clamping force of the elastic pad 33 on the packaging bag, so as to avoid the heat sealing plate 4 clamping the packaging bag with a large impact and excessive clamping pressure, which would affect the heat sealing quality.

[0033] The M-type packaging bag heat-sealing device disclosed in this embodiment is fixedly connected to the clamping arm 3 by a slider 23 slidably mounted on the inclined wall 211 of the fixed frame 21, and the push block 5 is movably connected to the clamping arm 3 through the connecting rod 6, forming a stable pressure clamping mechanism. The heat-sealing plate 4 fits tightly with the sealing end of the packaging bag, and with the buffering effect of the elastic pad 33, the heat-sealing plate 4 applies pressure to the packaging bag evenly and smoothly, resulting in a firm and tight heat seal and a good heat seal effect. Moreover, the heat-sealing plate 4 has an arc-shaped structure, and the heat-sealing line formed by the heat-sealing plate 4 for the packaging bag is an arc-shaped structure. The angle between the heat-sealed edge of the M-type packaging bag and the side end of the packaging bag is an obtuse angle. Compared with the traditional straight heat-sealing line, it reduces the impact force of the items on the inner sealing edge of the packaging bag during transportation or circulation, increases the sealing strength of the packaging bag, and makes it less likely for the bag to burst, leak air, or leak material.

[0034] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A heat-sealing device for M-type packaging bags, comprising a heat-sealing clamping mechanism provided on a suspension support, characterized in that: The heat-sealing clamping mechanism comprises a fixed frame, the bottom of the fixed frame is symmetrically provided with two downward inclined inclined walls, the two inclined walls are in V-shaped structure, a linear sliding rail is arranged on each inclined wall along the inclined direction, a sliding block is arranged on each linear sliding rail, a clamping arm is connected to each sliding block through a connecting plate, a heat-sealing plate is fixedly arranged at the clamping end of each clamping arm, and the heat-sealing plate is in arc-shaped structure; a telescopic cylinder is vertically arranged on the fixed frame, the telescopic end of the telescopic cylinder faces downward and is connected with a push block, and the clamping arms on the two sides are symmetrically arranged along the push block; the clamping arms are hingedly connected with the push block through connecting rods and pins, and the hinge hole at one end of the connecting rod is in long slot hole structure; a linear driving mechanism for driving the heat-sealing clamping mechanism to horizontally move is arranged on the suspension bracket.

2. The M-type packaging bag heat-sealing device according to claim 1, characterized in that: The suspension bracket is in rectangular frame structure, the linear driving mechanism arranged on the suspension bracket comprises transmission lead screws arranged between the left and right side frames of the suspension bracket, transmission lead screws are rotatably arranged at the front and rear ends between the left and right side frames of the suspension bracket, and a driving motor for driving the transmission lead screws to rotate is arranged on the suspension bracket; screw nuts are arranged on the fixed frame at positions corresponding to the transmission lead screws, and the screw nuts are rollingly connected to the corresponding transmission lead screws; a photoelectric switch sensor is arranged on one side of the heat-sealing clamping mechanism at the bottom of the suspension bracket.

3. The M-type packaging bag heat-sealing device according to claim 1, characterized in that: The telescopic rod of the telescopic cylinder is fixedly connected with a connecting sleeve coaxially arranged therewith, a ring groove is formed in the terminal end of the circumferential outer wall of the connecting sleeve, and an external thread is formed in the ring groove; a screw rod coaxially arranged with the connecting sleeve is connected to the push block, the end of the screw rod away from the push block is nested in the connecting sleeve, and a locking nut is arranged on the screw rod; the inner hole of the locking nut is in stepped hole structure, an inner thread one is arranged on the inner wall with a larger inner diameter of the locking nut, an inner thread two is arranged on the inner wall with a smaller inner diameter of the locking nut, the locking nut is threadedly connected to the screw rod through the inner thread two, and the screw rod is connected and locked with the connecting sleeve through the inner thread one of the locking nut.

4. The M-type packaging bag heat-sealing device according to claim 3, characterized in that: A guide sleeve is further arranged on the fixed frame at the periphery of the connecting sleeve, and the connecting sleeve is nested in the guide sleeve and can slide in the axial direction of the guide sleeve.

5. The M-shaped packaging bag heat sealing device according to claim 1, characterized in that: The clamping arm is in L-shaped plate structure, the inner side end face of the horizontal plate of the clamping arm is the clamping end, an arc-shaped groove is formed in the clamping end of the clamping arm, the heat-sealing plate is nested in the arc-shaped groove and fixedly connected with the clamping end of the clamping arm through a screw, and an installation hole one is further arranged in the arc-shaped groove, a temperature sensor is arranged in the installation hole one, and the temperature measuring end of the temperature sensor is attached to the back surface of the heat-sealing plate.

6. A heat sealing apparatus for M-type packaging bags according to claim 5, characterized in that: An elastic pad is fixedly arranged above the clamping end of the clamping arm on the arc-shaped groove, and a pressure sensor is arranged on one side of the elastic pad.

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