A bag sealing apparatus

Abstract

The utility model discloses a kind of bag feeding type sealing devices, including sealing frame, sealing mechanism, bag opening mechanism and clamping moving mechanism;Sealing mechanism includes two heat sealing plates being movably arranged on sealing frame, heat sealing area being formed between heat sealing plate, heating strip being arranged on the opposite face of one heat sealing plate and another heat sealing plate, and drive assembly for driving two heat sealing plates to move and being arranged on sealing frame;Bag opening assembly clamps and adsorbs the upper end of packaging bag located in heat sealing area, including two bag clamping assemblies oppositely arranged on two heat sealing plates and two adsorption bag opening assemblies respectively arranged on two heat sealing plates below opposite bag clamping assemblies;Clamping moving mechanism moves the packaging bag after cutting to heat sealing area and makes the upper end of packaging bag opposite to two clamping assemblies;The overall operation of the application is simple, the bag clamping assembly and adsorption bag opening assembly of heat sealing area cooperate, replace the mode of blowing drainage bag opening, greatly reduce noise, and can effectively guarantee the bag opening success rate of packaging bag.

Description

Technical Field

[0001] This utility model belongs to the field of packaging equipment technology, specifically relating to a bag sealing device. Background Technology

[0002] In the plastic packaging industry, roll film making machines are commonly used. These machines open plastic bags, fill them with materials, and then seal them. However, existing roll film making machines often experience problems during the opening process, such as bags failing to open properly, unstable opening, high failure rates, and slow efficiency. Furthermore, the method of using air blowing to guide the bag's flow, which relies on clamping mechanisms on both sides, results in high noise levels. These issues urgently require improvement. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art and provide a bag sealing device.

[0004] The present invention adopts the following technical solution:

[0005] A bag sealing device for sealing the upper end of a cut packaging bag includes a sealing frame, a sealing mechanism, a bag opening mechanism, and a clamping and moving mechanism.

[0006] The sealing mechanism includes two heat-sealing plates that can be moved toward or away from each other on a sealing frame, a heat-sealing area formed between the heat-sealing plates, a heating strip disposed on the opposite surfaces of one heat-sealing plate and the other heat-sealing plate, and a drive assembly disposed on the sealing frame to drive the two heat-sealing plates to move.

[0007] The bag opening assembly clamps and adsorbs the upper end of the packaging bag located in the heat-sealing zone, including two bag clamping assemblies arranged opposite to each other on the two heat-sealing plates and two adsorption bag opening assemblies respectively arranged on the two heat-sealing plates below the opposite bag clamping assemblies.

[0008] The clamping and moving mechanism moves the cut packaging bag to the heat-sealing area and aligns the upper end of the packaging bag with the two clamping components.

[0009] Preferably, the clamping and moving mechanism is located below the sealing mechanism and includes two movable blocks that can be moved along the moving direction of the heat sealing plate and are mounted on the sealing frame; two pneumatic grippers that can clamp the sides of the packaging bag and are respectively mounted on the two movable blocks; a first moving component that is mounted on the sealing frame and connects to and drives the two movable blocks to move; and two second moving components that are respectively mounted on the two movable blocks and drive the relative pneumatic grippers to move up and down. The second moving components can drive the packaging bag located below the heat sealing area to move upward to the upper end of the packaging bag and face the two bag clamping components.

[0010] Preferably, the clamping and moving mechanism further includes two guide components respectively disposed between the sealing frame and the relative moving block. The guide components include a guide slide rail disposed on the sealing frame and extending along the moving direction of the moving block, and a guide slider disposed at the bottom of the moving block and cooperating with the guide slide rail.

[0011] Preferably, the clamping and moving mechanism further includes two third moving components respectively disposed on the two moving blocks and connected to the relative second moving component. The third moving components drive the relative second moving component and the pneumatic gripper to move closer to the other pneumatic gripper, including a moving cylinder disposed on the moving block and a connecting block disposed at the front end of the moving cylinder and connected to the second moving component.

[0012] Preferably, the second moving component includes a lifting cylinder connected to the connecting block and located below the heat-sealing zone, and a lifting block disposed at the upper end of the lifting cylinder for mounting relative pneumatic grippers.

[0013] Preferably, the bag clamping assembly includes a fixed clamping block disposed on the top of the heat-sealing plate, a flipping clamping block disposed on the fixed clamping block to clamp the edge of the bag opening, and a flipping cylinder disposed on the heat-sealing plate to drive the flipping clamping block to flip.

[0014] Preferably, the front end of the fixing block is formed with an arc-shaped fixing part, and the opposite surface of the flipping block and the fixing block is formed with an arc-shaped positioning groove that fits with the arc-shaped fixing part.

[0015] Preferably, the drive assembly includes a drive cylinder disposed on the sealing frame and connected to a heat sealing plate, two transmission linkage assemblies disposed between the same side ends of the two heat sealing plates, and two guide members disposed between the same side ends of the two heat sealing plates.

[0016] Preferably, the transmission linkage assembly includes a rotating seat respectively disposed on the sealing frame between two heat-sealing plates, a first connecting rod rotatably disposed on the rotating seat, a first connecting block and a second connecting block respectively disposed at the ends of the two heat-sealing plates, a second connecting rod rotatably disposed between the first connecting block and the first connecting rod, and a third connecting rod rotatably disposed between the first connecting rod and the second connecting block. The driving cylinder drives the relative heat-sealing plate to move closer to the other heat-sealing plate, causing the second connecting rod to rotate upward and the third connecting rod to rotate downward, thereby driving the two heat-sealing plates to move towards each other.

[0017] Preferably, the adsorption bag opening assembly includes a plurality of mounting blocks spaced apart at the bottom of the heat-sealing plate and a plurality of negative pressure suction heads respectively disposed on the plurality of mounting blocks.

[0018] As can be seen from the above description of the present invention, compared with the prior art, the beneficial effects of the present invention are as follows: The present application defines the structure of the sealing device and sets up a clamping and moving mechanism to move the cut packaging bag to the sealing area. The bag clamping component in the heat sealing area cooperates with the adsorption bag opening component. The bag clamping component clamps the upper end of the packaging bag, and the adsorption bag opening component adsorbs and clamps the side of the packaging bag. Then, the driving component controls the movement of the two heat sealing plates to open the packaging bag. The overall operation is simple, replaces the air blowing and drainage bag opening method, greatly reduces noise, and can effectively ensure the success rate of opening the packaging bag. Attached Figure Description

[0019] Figure 1 This is a schematic diagram of the structure of the present invention. Figure 1 ;

[0020] Figure 2 This is a schematic diagram of the structure of the present invention. Figure 2 ;

[0021] Figure 3 This is a schematic diagram of the bag opening mechanism;

[0022] Figure 4 for Figure 3 Enlarged view of part of the image;

[0023] Figure 5 This is a schematic diagram of the clamping and moving mechanism;

[0024] Figure 6 This is a partial structural diagram of the clamping and moving mechanism;

[0025] In the diagram, 1-sealing frame, 2-sealing mechanism, 3-bag opening mechanism, 4-clamping and moving mechanism, 11-rotation clearance area, 12-bag guiding hole, 21-heat sealing plate, 22-heat sealing area, 23-heating strip, 24-drive assembly, 25-drive cylinder, 26-transmission linkage assembly, 261-rotating seat, 262-first connecting rod, 263-first connecting block, 264-second connecting block, 265-second connecting rod, 266-third connecting rod, 27-guide component, 271-guide rail, 272-guide block, 31-bag clamping. Components, 311-Fixed clamping block, 312-Flipping clamping block, 313-Flipping cylinder, 314-Arc-shaped fixing part, 315-Arc-shaped positioning groove, 32-Adsorption bag opening component, 321-Mounting block, 322-Negative pressure suction head, 41-Moving block, 42-Pneumatic gripper, 43-Synchronization plate, 44-Second moving component, 441-Lifting cylinder, 442-Lifting block, 45-Guide component, 451-Guide slide rail, 452-Guide slider, 46-Third moving component, 461-Moving cylinder, 462-Connecting block. Detailed Implementation

[0026] The present invention will be further described below through specific embodiments.

[0027] Reference Figures 1 to 6 As shown, a bag sealing device is used to seal the upper end of a cut packaging bag. It includes a sealing frame 1, a sealing mechanism 2, a bag opening mechanism 3, and a clamping and moving mechanism 4. During operation, the clamping and moving mechanism 4 clamps the cut packaging bag to the sealing mechanism 2, the bag opening mechanism 3 opens the upper end of the bag, and after the contents are put in, the sealing mechanism 2 heat-seales the opening of the packaging bag.

[0028] The sealing mechanism 2 includes two heat-sealing plates 21 that can move towards or away from each other on the sealing frame 1, a heat-sealing area 22 formed between the heat-sealing plates 21, a heating strip 23 disposed on the opposite surfaces of one heat-sealing plate and the other heat-sealing plate, and a drive assembly 24 disposed on the sealing frame 1 to drive the two heat-sealing plates 21 to move. Specifically, the drive assembly 24 includes a drive cylinder 25 disposed on the sealing frame 1 and connected to one heat-sealing plate, two transmission linkage assemblies 26 respectively disposed between the same side ends of the two heat-sealing plates 21, and two guide members 27 respectively disposed between the same side ends of the two heat-sealing plates 21. The two heat-sealing plates 21 can move towards or away from each other by cooperating with the two transmission linkage assemblies 26, the two guide members 27 and the drive cylinder 25. Furthermore, the heating strip 23 extends along the length of the heat-sealing plate 21, and the heating strip 23 is a commonly used component in the field of cylindrical film making machines. Its specific working principle will not be further described here.

[0029] The transmission linkage assembly 26 includes a rotating seat 261 respectively disposed on the sealing frame 21 between two heat-sealing plates 21, a first connecting rod 262 rotatably disposed on the rotating seat 261, a first connecting block 263 and a second connecting block 264 respectively disposed at the ends of the two heat-sealing plates 21, a second connecting rod 265 rotatably disposed between the first connecting block 263 and the first connecting rod 262, and a third connecting rod 266 rotatably disposed between the first connecting rod 262 and the second connecting block 264. Specifically, the drive cylinder 25 drives the relative heat-sealing plate 21 to move closer to the other heat-sealing plate, causing the second connecting rod 265 to rotate upward and the third connecting rod 266 to rotate downward, thereby driving the two heat-sealing plates 21 to move towards each other. The sealing frame 1 has a rotation clearance area 11 for the first connecting rod 262 and the third connecting rod 266 to rotate downward.

[0030] The guide member 27 includes a guide rail 271 extending along the moving direction of the heat-sealing plate 21 and two guide blocks 272 respectively provided at the bottom of the two heat-sealing plates 21 and cooperating with the guide rail 271. Through the cooperation of the two guide blocks 272 and the guide rail 271, the two heat-sealing plates 21 can move stably towards or away from each other.

[0031] The bag opening assembly 3 clamps and adsorbs the upper end of the packaging bag located in the heat-sealing zone 22. It includes two bag clamping assemblies 31 arranged opposite each other on the two heat-sealing plates 21 and two adsorption bag opening assemblies 32 respectively arranged on the two heat-sealing plates 21 below the opposite bag clamping assemblies 31. Specifically, the bag clamping assembly 31 includes a fixed clamping block 311 arranged on the top of the heat-sealing plate 21, a flipping clamping block 312 rotatably arranged on the fixed clamping block 311 to clamp the edge of the packaging bag opening, and a clamping block 312 arranged on the heat-sealing plate 21. The upper drive flipping clamp 312 flips the flipping cylinder 313; wherein, the front end of the fixed clamp 311 is formed with an arc-shaped fixing part 314, and the opposite surface of the flipping clamp 312 and the fixed clamp 311 is formed with an arc-shaped positioning groove 315 that fits with the arc-shaped fixing part 314; through the cooperation of the arc-shaped fixing part 314 and the arc-shaped positioning groove 315, the contact area between the bag clamping assembly 31 and the upper end of the packaging bag is increased, ensuring that it can clamp the bag opening of the packaging bag and ensuring the opening rate of the packaging bag.

[0032] The adsorption bag opening assembly 32 includes multiple mounting blocks 321 spaced apart at the bottom of the heat-sealing plate 21 and multiple negative pressure suction heads 322 respectively mounted on the mounting blocks 321. The multiple negative pressure suction heads 322 are connected to an external negative pressure source. When the bag clamping assembly 31 clamps the upper port of the packaging bag, the negative pressure suction heads 322 adsorb the side of the packaging bag to cooperate with the bag clamping assembly 31 to open the packaging bag. This method replaces the air blowing method for opening the bag, greatly reduces noise, and can effectively ensure the success rate of opening the packaging bag.

[0033] The clamping and moving mechanism 4, located below the sealing mechanism 2, moves the cut packaging bag to the heat-sealing zone 22 and aligns the upper end of the packaging bag with the two bag clamping assemblies 31. It includes two movable blocks 41 movable along the moving direction of the heat-sealing plate 21 on the sealing frame 1; two pneumatic grippers 42 on the two movable blocks 41 respectively, capable of clamping the sides of the packaging bag; a first moving component on the sealing frame 1 connected to and driving the two movable blocks 41; two second moving components 44 on the two movable blocks 41 respectively, driving the relative pneumatic grippers 42 to move up and down; two guide components 45 respectively located between the sealing frame 1 and the relative movable blocks 41; and two third moving components 46 on the two movable blocks 41 respectively, connected to the relative second moving components 44. The sealing frame 1 is provided with a bag-guiding hole 12, and the heat-sealing zone 22 and the bag-guiding hole 12 are positioned opposite each other on both sides of the sealing frame 1. During packaging bag cutting, the bag can be guided through the bag-guiding hole 12. A cutting mechanism is installed to cut the packaging film to obtain the packaging bag. During cutting, the first moving component drives two moving blocks 41 to move two pneumatic grippers 42 to below the bag inlet 12 to clamp the packaging bag so that the cutting mechanism can cut the packaging film. After cutting, the first moving component drives the two moving blocks 41 to move the two pneumatic grippers 42 in the opposite direction to the heat sealing area 22. Then, the second moving component 44 drives the two pneumatic grippers 42 to move the packaging bag upward to the bag loading port opposite to the bag clamping component 31. Specifically, the cutting mechanism is a commonly used cutting structure in the film rolling machine. Its specific structure and working principle will not be further described here. Furthermore, the first moving component can use a motor and a screw and nut pair to realize the synchronous movement of the two moving blocks. A synchronization plate 43 connected to the screw and nut pair can be set between the two moving blocks 41 to ensure the synchronous movement of the two moving blocks 41.

[0034] The second moving component 44 can move the packaging bag located below the heat-sealing zone 22 upward to the upper end of the packaging bag opposite to the two bag clamping components 31. It includes a lifting cylinder 441 located below the heat-sealing zone 22 and connected to the third moving component 46, and a lifting block 442 disposed on the upper end of the lifting cylinder 411 for mounting the relative pneumatic gripper 42.

[0035] The guide assembly 45 includes a guide slide rail 451 that extends along the moving direction of the moving block 41 and is disposed on the sealing frame 1, and a guide slider 452 that is disposed at the bottom of the moving block 41 and cooperates with the guide slide rail 451.

[0036] The third moving component 46 drives the relative second moving component 44 and the pneumatic gripper 42 to move closer to another pneumatic gripper. It includes a moving cylinder 461 mounted on the moving block 41 and a connecting block 462 mounted at the front end of the moving cylinder 461 and connected to the lifting cylinder 441. By defining the structure of the third moving component 46, the two pneumatic grippers 42 can move towards or away from each other to accommodate the gripping of packaging bags of different sizes.

[0037] The working principle of this application is as follows:

[0038] Step 1: The first moving component drives the two moving blocks 41 to move the two pneumatic grippers 42 to below the bag inlet 12, so that the two pneumatic grippers 42 respectively clamp the two sides of the cut packaging bag.

[0039] Step 2: The first moving component drives the two moving blocks 41 to move the two pneumatic grippers 42 in the opposite direction to below the heat sealing area 22. The two second moving components 44 respectively drive the relative pneumatic grippers 42 to move the packaging bag upward to the upper port of the packaging bag opposite to the two bag clamping components 31.

[0040] Step 3: The drive cylinder 25 works in conjunction with the two transmission linkage assemblies 26 to make the two heat sealing plates 21 move towards each other and fit together. At this time, the negative pressure suction head 322 fits with the side of the packaging bag. Then, the flipping cylinder 313 controls the flipping clamp 312 to rotate downward and clamp the upper edge of the packaging bag. The negative pressure suction head 322 works to adsorb the side of the packaging bag.

[0041] Step four: The drive cylinder 25 works in conjunction with the two transmission linkage assemblies 26, causing the two heat sealing plates 22 to move in opposite directions. At this time, the packaging bag is opened with the cooperation of the bag clamping assembly 31 and the negative pressure suction head 322, and the items can be put into the packaging bag.

[0042] Step 5: Drive cylinder 25 to work again, causing the two heat sealing plates 21 to move towards each other and fit together. Then control heating strip 23 to work, so that the upper end of the packaging bag is heat-pressed and sealed, thus completing the sealing of the packaging bag.

[0043] This application defines the structure of the sealing device and sets up a clamping and moving mechanism 4 to move the cut packaging bag to the sealing area 22. The bag clamping component 31 of the heat sealing area 22 cooperates with the suction opening component 32. The bag clamping component 31 clamps the upper end of the packaging bag, and the suction opening component 32 suctions and clamps the side of the packaging bag. Then, the driving component 24 controls the movement of the two heat sealing plates 21 to open the packaging bag. The overall operation is simple, replaces the air blowing and drainage method of opening the bag, greatly reduces noise, and can effectively ensure the success rate of opening the packaging bag.

[0044] The above description is merely a preferred embodiment of the present utility model, and therefore cannot be construed as limiting the scope of the present utility model. All equivalent changes and modifications made in accordance with the scope of the patent application and the contents of the specification of the present utility model shall still fall within the scope of the patent of the present utility model.

Claims

1. A bag sealing device for sealing the upper end of a cut packaging bag, characterized in that: Includes sealing frame, sealing mechanism, bag opening mechanism and clamping and moving mechanism; The sealing mechanism includes two heat-sealing plates that can be moved toward or away from each other on a sealing frame, a heat-sealing area formed between the heat-sealing plates, a heating strip disposed on the opposite surfaces of one heat-sealing plate and the other heat-sealing plate, and a drive assembly disposed on the sealing frame to drive the two heat-sealing plates to move. The bag opening assembly clamps and adsorbs the upper end of the packaging bag located in the heat-sealing zone, including two bag clamping assemblies arranged opposite to each other on the two heat-sealing plates and two adsorption bag opening assemblies respectively arranged on the two heat-sealing plates below the opposite bag clamping assemblies. The clamping and moving mechanism moves the cut packaging bag to the heat-sealing area and aligns the upper end of the packaging bag with the two clamping components.

2. The bag sealing device according to claim 1, characterized in that: The clamping and moving mechanism is located below the sealing mechanism and includes two movable blocks that can be moved along the moving direction of the heat sealing plate and are mounted on the sealing frame; two pneumatic grippers that can clamp the sides of the packaging bag and are respectively mounted on the two movable blocks; a first moving component that is mounted on the sealing frame and connects to and drives the two movable blocks to move; and two second moving components that are respectively mounted on the two movable blocks and drive the relative pneumatic grippers to move up and down. The second moving components can drive the packaging bag located below the heat sealing area to move upward to the upper end of the packaging bag and face the two bag clamping components.

3. The bag sealing device according to claim 2, characterized in that: The clamping and moving mechanism also includes two guide components respectively disposed between the sealing frame and the relative moving block. The guide components include a guide slide rail disposed on the sealing frame and extending along the moving direction of the moving block, and a guide slider disposed at the bottom of the moving block and cooperating with the guide slide rail.

4. The bag sealing device according to claim 2, characterized in that: The clamping and moving mechanism also includes two third moving components respectively disposed on two moving blocks and connected to the relative second moving component. The third moving components drive the relative second moving component and the pneumatic gripper to move closer to another pneumatic gripper, including a moving cylinder disposed on the moving block and a connecting block disposed at the front end of the moving cylinder and connected to the second moving component.

5. A bag sealing device according to claim 4, characterized in that: The second moving component includes a lifting cylinder connected to the connecting block and located below the heat-sealing zone, and a lifting block disposed on the upper end of the lifting cylinder for mounting relative pneumatic grippers.

6. The bag sealing device according to claim 1, characterized in that: The bag clamping assembly includes a fixed clamping block disposed on the top of the heat-sealing plate, a flipping clamping block disposed on the fixed clamping block to clamp the edge of the bag opening, and a flipping cylinder disposed on the heat-sealing plate to drive the flipping clamping block to flip.

7. A bag sealing device according to claim 6, characterized in that: The front end of the fixed clamping block is formed with an arc-shaped fixing part, and the opposite surface of the flipping clamping block and the fixed clamping block is formed with an arc-shaped positioning groove that fits with the arc-shaped fixing part.

8. A bag sealing device according to claim 1, characterized in that: The drive assembly includes a drive cylinder mounted on a sealing frame and connected to a heat-sealing plate, two transmission linkage assemblies respectively mounted between the same-side ends of the two heat-sealing plates, and two guide members respectively mounted between the same-side ends of the two heat-sealing plates.

9. A bag sealing device according to claim 8, characterized in that: The transmission linkage assembly includes a rotating seat located between two heat-sealing plates on a sealing frame, a first connecting rod rotatably mounted on the rotating seat, a first connecting block and a second connecting block located at the ends of the two heat-sealing plates, a second connecting rod rotatably mounted between the first connecting block and the first connecting rod, and a third connecting rod rotatably mounted between the first connecting block and the second connecting block. The driving cylinder drives the relative heat-sealing plate to move closer to the other heat-sealing plate, causing the second connecting rod to rotate upward and the third connecting rod to rotate downward, thereby driving the two heat-sealing plates to move towards each other.

10. A bag sealing device according to claim 1, characterized in that: The adsorption bag opening assembly includes multiple mounting blocks spaced apart at the bottom of the heat-sealing plate and multiple negative pressure suction heads respectively mounted on the mounting blocks.

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