Sealing structure for food packaging

Abstract

The sealing structure for food packaging comprises a mounting plate, a U-shaped mounting frame is arranged on the front side of the mounting plate, a hydraulic cylinder is arranged on the front side of the U-shaped mounting frame, the output end of the hydraulic cylinder backwards penetrates through the U-shaped mounting frame to be fixedly connected with a transverse plate, a first heat sealing piece is arranged on the rear side of the transverse plate, and the mounting plate is provided with a groove corresponding to the first heat sealing piece in position. A second heat sealing piece is arranged in the groove, and the transverse plate downwards extends out of the U-shaped mounting plate to be fixedly connected with a smoothing mechanism. The smoothing mechanism comprises a rectangular sliding barrel, a rectangular sliding block, a smoothing rod, a plurality of first springs and a pulling assembly, a first limiting assembly is arranged between the smoothing rod and the sliding groove, and a second limiting assembly is arranged between the smoothing rod and the mounting plate; the flattening rod moves upwards to flatten the package, and meanwhile, objects remaining at the sealing opening are pushed upwards to be away from the sealing opening, so that the sealing opening of the package is smooth and free of sundries when heat sealing is carried out on the sealing opening of the package, and therefore it is guaranteed that the heat sealing effect is better.

Description

Technical Field

[0001] The utility model relates to the field of packaging sealing, in particular to a sealing structure for food packaging. Background Art

[0002] Food packaging refers to packaging food products to protect the safety, freshness and quality of food and facilitate transportation, storage and use. Food packaging is not only a protective measure, but also a marketing tool that can enhance the attractiveness and competitiveness of products. In order to maintain the freshness of food, food packaging needs to be sealed at the end. Most food packaging is sealed by heat sealing, which heats the sealing part to melt and bond it together.

[0003] At present, when heat-sealing the opening of food packaging, it is necessary to pay attention to whether the opening is relatively flat and whether there are foreign objects. Only after confirming that there are no foreign objects can the opening be heat-sealed. If the opening is not flat and there are foreign objects, it will affect the heat-sealing effect of the opening, and finally lead to poor heat-sealing effect and leakage at the opening. Utility Model Content

[0004] In order to overcome the shortcomings of the prior art, the purpose of the utility model is to provide a sealing structure for food packaging, which flattens the package by moving the smoothing rod upward, and at the same time pushes the objects remaining at the seal upward away from the seal, so that the package seal is relatively flat and free of debris when the package is heat-sealed, thereby ensuring a better heat-sealing effect.

[0005] The technical solution adopted by the utility model is as follows:

[0006] A sealing structure for food packaging, comprising a mounting plate, a U-shaped mounting frame is provided on the front side of the mounting plate, a hydraulic cylinder is provided on the front side of the U-shaped mounting frame, an output end of the hydraulic cylinder penetrates the U-shaped mounting frame backwards and is fixedly connected to a transverse plate, a first heat sealing sheet is provided on the rear side of the transverse plate, the mounting plate is provided with a groove corresponding to the position of the first heat sealing sheet, and a second heat sealing sheet is provided in the groove, and the transverse plate extends downward out of the U-shaped mounting plate and is fixedly connected to a smoothing mechanism;

[0007] The smoothing mechanism includes a rectangular slide barrel, a rectangular slider, a smoothing rod, a plurality of first springs and a pulling assembly, the rectangular slide barrel is fixedly arranged on the lower side of the cross plate, and the rear side of the rectangular slide barrel is an open end, the rectangular slider is arranged in the rectangular slide barrel for sliding forward and backward, a plurality of the first springs are evenly distributed between the front side of the rectangular slider and the rectangular slide barrel, a slide groove is arranged on the upper side of the rear end of the rectangular slider, and the rear side and the upper side of the slide groove are both open, the smoothing rod is arranged in the slide groove for sliding up and down, the pulling assembly is arranged on the front side of the rectangular slide barrel, and the pulling assembly is connected to the smoothing rod, a first limiting assembly is arranged between the smoothing rod and the slide groove, and a second limiting assembly is arranged between the smoothing rod and the mounting plate.

[0008] Compared with the prior art, the beneficial effect of the utility model is that: when sealing the package, the package is first pressed down by the rectangular slider and the smoothing rod, and then the smoothing rod is pulled upward by the pulling assembly. At this time, the package is flattened by the upward movement of the smoothing rod, and the objects remaining at the seal can be pushed upward away from the seal, so that the package seal is relatively flat and free of debris when the package is heat-sealed, thereby ensuring a better heat-sealing effect. When the smoothing rod moves upward to the highest point, the first heat-sealing sheet on the cross plate enters the corresponding groove, and the part of the package to be heat-sealed is pushed into the groove. At this time, the package is heat-sealed with the cooperation of the first heat-sealing sheet and the second heat-sealing sheet, and finally the heat-sealing work is completed. After the heat-sealing work is completed, the cross plate moves forward, and the smoothing rod is reconnected with the rectangular slider under the action of the second limit assembly, and finally moves forward with the rectangular slider until it is reset.

[0009] As a preferred embodiment of the utility model, the pulling assembly includes two groups of pulling components that are symmetrically arranged on the left and right, and the pulling components include a push rod, a pull rope and a guide wheel. The guide wheel is fixedly connected to the upper end of the side of the horizontal plate, and the rear end of the guide wheel does not exceed the rear side of the horizontal plate. The push rod is fixedly arranged on the front side of the rectangular slider, and the push rod extends forward and penetrates the rectangular slide barrel. The front end of the push rod is provided with a limiting hole matching the pull rope. One end of the pull rope is fixedly connected to the rectangular slide barrel, and the other end of the pull rope passes through the limiting hole and the guide wheel in sequence and is fixedly connected to the upper side of the smoothing rod. The pull rope is pushed forward by the push rod, so that the pull rope gradually pulls the smoothing rod upward. The smoothing rod moves upward to complete the flattening and cleaning of the package, and the limiting hole ensures that the push rod can push the pull rope forward normally every time it moves forward.

[0010] As a preferred embodiment of the utility model, the guide wheel is provided with a limit plate matching the pull rope. The limit plate allows the pull rope to be always limited inside the guide wheel, thus ensuring that the pull rope can normally pull the smoothing rod upward to the bottom of the guide wheel each time it is pushed forward, and the height position of the guide wheel is higher than the height position of the first heat sealing sheet.

[0011] As a preferred embodiment of the utility model, the first limit assembly includes a T-shaped slider, the T-shaped slider is fixedly arranged on the front side of the smoothing rod, and the slide groove is provided with a T-shaped slide groove matching the T-shaped slider. Through the coordinated use of the T-shaped slider and the T-shaped slide groove, the smoothing rod cannot rotate in the T-shaped slide groove when it is initially pulled, and can only move upward until it enters the second limit assembly, and when it is finally reset, the T-shaped slider is inserted into the T-shaped slide groove, so that the smoothing rod can normally follow the rectangular slider to reset together.

[0012] As a preferred embodiment of the present invention, the second limiting assembly includes two second limiting members symmetrically arranged on the left and right sides, the smoothing rod extends out of the sliding groove on the left and right sides, and the two second limiting members are respectively connected to the smoothing rod on the left and right sides, the second limiting member includes an L-shaped gear rod, a multi-stage telescopic rod, a second spring, a stopper and a limit block, the L-shaped gear rod is fixedly connected to the mounting plate, and the L-shaped gear rod opens downward, the multi-stage telescopic rod is fixedly connected to the L-shaped gear rod in a vertical direction, the stopper is fixedly connected to the lower end of the multi-stage telescopic rod, the second spring is fixedly arranged between the L-shaped gear rod and the upper side of the stopper, and the second spring is sleeved on the outside of the multi-stage telescopic rod, and the limit block is fixedly connected to the smoothing rod; the left and right sides of the rectangular sliding barrel are provided with through grooves matching the limit blocks. When the smoothing rod moves upward, it will push the block to squeeze the second spring. After the heat sealing of the package mouth is completed, the top rod will no longer push the pull rope forward. At this time, the smoothing rod will be gradually pushed back into the slide groove under the elastic extension of the second spring itself, ensuring that the smoothing rod can smooth and reset the package normally, thereby improving the heat sealing effect of the package mouth.

[0013] As a preferred embodiment of the utility model, the lower end of the L-shaped gear bar and the smoothing rod are both provided with guiding inclined surfaces. Through the two guiding inclined surfaces, it is ensured that the smoothing rod can normally enter between the L-shaped gear bar and the mounting plate, thereby improving the overall heat sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a structural schematic diagram of a sealing structure for food packaging of the utility model;

[0015] Figure 2 for Figure 1 The enlarged schematic diagram of point A in the middle;

[0016] Figure 3 This is a schematic diagram of the cross-sectional structure of a sealing structure for food packaging of the utility model. Figure 1 ;

[0017] Figure 4 for Figure 3 The enlarged schematic diagram of point B in the middle;

[0018] Figure 5 This is a schematic diagram of the cross-sectional structure of a sealing structure for food packaging of the utility model. Figure 2 .

[0019] The accompanying drawings include: mounting plate 1, U-shaped mounting frame 11, hydraulic cylinder 12, cross plate 13, first heat sealing plate 14, second heat sealing plate 15, rectangular slide barrel 2, rectangular slider 21, smoothing rod 22, first spring 23, slide groove 24, push rod 3, pull rope 31, guide wheel 32, limit plate 33, T-shaped slider 4, T-shaped slide groove 41, L-shaped gear rod 5, multi-stage telescopic rod 51, second spring 52, block 53, limit block 54, through groove 55, guide slope 6. DETAILED DESCRIPTION

[0020] Typical implementations that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different implementations without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0021] In the description of the present application, the terms "first", "second", "one side", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0022] The embodiment is basically as shown in the attached Figure 1-5 As shown: A sealing structure for food packaging, comprising a mounting plate 1, a U-shaped mounting frame 11 is arranged on the front side of the mounting plate 1, a hydraulic cylinder 12 is arranged on the front side of the U-shaped mounting frame 11, an output end of the hydraulic cylinder 12 penetrates the U-shaped mounting frame 11 backwards and is fixedly connected to a transverse plate 13, a first heat sealing sheet 14 is arranged on the rear side of the transverse plate 13, a groove corresponding to the position of the first heat sealing sheet 14 is arranged on the mounting plate 1, and a second heat sealing sheet 15 is arranged in the groove, and the transverse plate 13 extends downwards out of the U-shaped mounting plate 1 and is fixedly connected to a smoothing mechanism;

[0023] The smoothing mechanism includes a rectangular slide barrel 2, a rectangular slider 21, a smoothing rod 22, a plurality of first springs 23 and a pulling assembly. The rectangular slide barrel 2 is fixedly arranged on the lower side of the horizontal plate 13, and the rear side of the rectangular slide barrel 2 is an open end. The rectangular slider 21 slides forward and backward in the rectangular slide barrel 2. A plurality of first springs 23 are evenly distributed between the front side of the rectangular slider 21 and the rectangular slide barrel 2. A slide groove 24 is provided on the upper side of the rear end of the rectangular slider 21, and the rear side and the upper side of the slide groove 24 are both open. The smoothing rod 22 slides up and down in the slide groove 24. The pulling assembly is arranged on the front side of the rectangular slide barrel 2, and the pulling assembly is connected to the smoothing rod 22. A first limit assembly is provided between the smoothing rod 22 and the slide groove 24, and a second limit assembly is provided between the smoothing rod 22 and the mounting plate 1.

[0024] The pull rope 31 passes through the rear side of the U-shaped mounting frame 11 and then passes around the guide wheel 32 to connect with the upper side of the smoothing rod 22. When sealing, the package to be sealed is lowered from the upper side through the existing loading equipment, and the package bag is located between the front side of the mounting plate 1 and the rear side of the rectangular slider 21. Then the device is started, and the hydraulic cylinder 12 is started. The hydraulic cylinder 12 starts to drive the cross plate 13 to move backward. The backward movement of the cross plate 13 will drive the rectangular slide barrel 2 to move backward. The backward movement of the rectangular slide barrel 2 will drive the rectangular slide barrel 21 to move backward until the rectangular slide barrel 21 and the rear side of the smoothing rod 22 are aligned with the mounting plate 1. The front sides of the bags are in contact with each other. At this time, the smoothing rod 22 and the rectangular slider 21 will cooperate with the mounting plate 1 to clamp the packaging bag. The cross plate 13 continues to move backward, and the rectangular slide barrel 2 continues to move backward, so that the rectangular slider 21 is relatively gradually retracted into the rectangular slide barrel 2. At this time, the rectangular slider 21 will gradually squeeze the first springs 23 to shrink them, and at the same time, the pulling component will start, and the pulling component will start to gradually pull the smoothing rod 22 upward out of the slide slot 24. After the smoothing rod 22 is pulled upward out of the slide slot 24, the smoothing rod 22 will be immediately restricted by the second limit component so that it can only continue to move upward. In this way, the smoothing rod 22 gradually moves upward, and the smoothing rod 22 will pull and smooth the packaging bag. The smoothing rod 22 continues to move upward and the cross plate 13 continues to move backward until the first heat sealing sheet 14 on the cross plate 13 enters the groove in the mounting plate 1 and contacts the second heat sealing sheet 15. The smoothing rod 22 moves to the top. At this time, the package is heat-sealed under the heating action of the first heat sealing sheet 14 and the second heat sealing sheet 15 to achieve the sealing operation. Then the hydraulic cylinder 12 is started to retract the output end, and the cross plate 13 moves forward. At this time, the smoothing rod 22 will be in the second limit assembly. The rectangular slide barrel 2 moves downward, and at this time, the rectangular slide barrel 2 will move forward with the horizontal plate 13. At this time, the first springs 23 stretch under the action of their own elasticity, so that the rectangular slide block 21 always abuts against the front side of the mounting plate 1, until the smoothing rod 22 re-enters the slide groove 24 and is limited by the first limit assembly. At this time, the first springs 23 return to the initial state, that is, at this time, the rectangular slide block 21 follows the rectangular slide barrel 2 to gradually move away from the mounting plate 1. The first limit assembly includes a T-shaped slide block 4, which is fixed to the front side of the smoothing rod 22, and the slide groove 24 is provided with a T-shaped slide groove 41 that matches the T-shaped slide block 4. Through the cooperation between the T-shaped slide block 4 and the T-shaped slide groove 41, the smoothing rod 22 can only continue to move along the extension direction of the T-shaped slide groove 41, that is, it can only move up and down;

[0025] like Figure 3-4As shown, the pulling assembly includes two groups of pulling components that are symmetrically arranged on the left and right. The pulling components include a top rod 3, a pull rope 31, and a guide wheel 32. The guide wheel 32 is fixedly connected to the upper end of the side of the horizontal plate 13, and the rear end of the guide wheel 32 does not exceed the rear side of the horizontal plate 13. The top rod 3 is fixedly arranged at the front side of the rectangular slider 21, and the top rod 3 extends forward and penetrates the rectangular slide barrel 2. The front end of the top rod 3 is provided with a limiting hole matching the pull rope 31. One end of the pull rope 31 is fixedly connected to the rectangular slide barrel 2, and the other end of the pull rope 31 passes through the limiting hole and the guide wheel 32 in sequence and is fixedly connected to the upper side of the smoothing rod 22. The guide wheel 32 is provided with a limiting plate 33 matching the pull rope 31. The stretching rod 31 can be blocked inside the guide wheel 32 by the limiting plate 33, thus preventing the stretching rod 31 from being still restricted in the guide wheel 32 when it is in a relatively loose state, which can effectively ensure the normal operation of the entire device; when the rectangular sliding block 21 gradually slides into the rectangular sliding barrel 2 and squeezes the first springs 23, the rectangular sliding block 21 will drive the push rod 3 to move forward, and the forward movement of the push rod 3 will push the pull rope 31 to move relatively forward, and since one end of the pull rope 31 is connected to the lower side of the rectangular sliding barrel 2, and the other end of the pull rope 31 is fixedly connected to the upper side of the smoothing rod 22, when the pull rope 31 is pushed forward, it will pull the smoothing rod 22 to gradually separate from the slide groove 24 upward. At the same time, under the action of the first limiting component and the second limiting component, the smoothing rod 22 cannot be turned over and can only move up and down. The upward movement of the smoothing rod 22 will smooth the sealing part of the packaging bag that needs to be sealed, and will clean up the food or other impurities remaining at the sealing part, thus ensuring that the seal can be heat-sealed well and it is not easy to have a loose seal.

[0026] like Figure 1-4As shown, the second limiting assembly includes two second limiting members symmetrically arranged on the left and right sides, the left and right sides of the smoothing rod 22 extend out of the slide slot 24, and the two second limiting members are respectively connected to the left and right sides of the smoothing rod 22, the second limiting member includes an L-shaped lever 5, a multi-stage telescopic rod 51, a second spring 52, a stopper 53 and a stopper 54, the L-shaped lever 5 is fixedly connected to the mounting plate 1, and the L-shaped lever 5 opens downward, the multi-stage telescopic rod 51 is fixedly connected to the L-shaped lever 5 along the vertical direction, the stopper 53 is fixedly connected to the lower end of the multi-stage telescopic rod 51, the second spring 52 is fixedly arranged between the L-shaped lever 5 and the upper side of the stopper 53, and the second spring 52 is sleeved on the outside of the multi-stage telescopic rod 51, and the stopper 54 is fixedly connected to the smoothing rod 22; the left and right sides of the rectangular slide barrel 2 are provided with through grooves 55 matching the stopper 54. The lower end of the L-shaped lever 5 and the smoothing rod 22 are provided with guide slopes 6. The smoothing rod 22 is guided in the direction by the guiding bevels provided on the smoothing rod 22 and the L-shaped gear rod 5 to ensure that it can normally enter between the L-shaped gear rod 5 and the mounting plate 1; when the smoothing rod 22 contacts the front side of the mounting plate 1, the limit block 54 on the side of the smoothing rod 22 will be located at the opening on the lower side of the L-shaped gear rod 5. At this time, under the pulling force of the pull rope 31, the smoothing rod 22 will move upward and forward, but when the smoothing rod 22 moves, the limit block 54 on the side will be stuck between the L-shaped gear rod 5 and the mounting plate 1. Therefore, under the blocking effect of the L-shaped gear rod 5, the limit block 54 cannot move forward, so that the smoothing rod 22 cannot move forward and can only move up and down. When moving upward, the block 53 will be pushed upward, and the block 53 will squeeze the second spring 52 to contract. At the same time, the multi-stage telescopic rod 51 will contract. When the package is sealed, the pull rope 31 will release the pull on the smoothing rod 22, that is, the limit block 54 releases the squeezing of the second spring 52, so that under the action of the elastic force of the second spring 52 itself, the block 53 will push the limit block 54 and the smoothing rod 22 to move downward until the smoothing rod 22 enters the slide groove 24 and the T-shaped slider 4 is re-stuck in the T-shaped slide groove 41. At this time, the second spring 52 and the first spring 23 return to their original state. At this time, the smoothing rod 22 will move forward with the rectangular slider 21 until it returns to its original position.

[0027] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A sealing structure for food packaging, comprising a mounting plate, characterized in that: A U-shaped mounting frame is provided on the front side of the mounting plate, a hydraulic cylinder is provided on the front side of the U-shaped mounting frame, an output end of the hydraulic cylinder passes through the U-shaped mounting frame backwards and is fixedly connected to a transverse plate, a first heat sealing sheet is provided on the rear side of the transverse plate, the mounting plate is provided with a groove corresponding to the position of the first heat sealing sheet, and a second heat sealing sheet is provided in the groove, the transverse plate extends downward out of the U-shaped mounting plate and is fixedly connected to a smoothing mechanism; the smoothing mechanism comprises a rectangular sliding barrel, a rectangular sliding block, a smoothing rod, a plurality of first springs and a pulling assembly, the rectangular sliding barrel is fixedly arranged on the lower side of the transverse plate, and The rear side of the rectangular slide barrel is an open end, the rectangular slider is arranged in the rectangular slide barrel for sliding forward and backward, a plurality of the first springs are evenly distributed between the front side of the rectangular slider and the rectangular slide barrel, a slide groove is provided on the upper side of the rear end of the rectangular slide barrel, and the rear side and the upper side of the slide groove are both open, the smoothing rod is arranged in the slide groove for sliding up and down, the pulling assembly is arranged on the front side of the rectangular slide barrel, and the pulling assembly is connected to the smoothing rod, a first limiting assembly is provided between the smoothing rod and the slide groove, and a second limiting assembly is provided between the smoothing rod and the mounting plate.

2. A sealing structure for food packaging according to claim 1, characterized in that: The pulling assembly includes two groups of pulling components symmetrically arranged on the left and right, and the pulling components include a push rod, a pull rope and a guide wheel. The guide wheel is fixedly connected to the upper end of the side of the horizontal plate, and the rearmost end of the guide wheel does not exceed the rear side of the horizontal plate. The push rod is fixedly arranged on the front side of the rectangular slider, and the push rod extends forward and penetrates the rectangular slide barrel. A limiting hole matching the pull rope is provided at the front end of the push rod. One end of the pull rope is fixedly connected to the rectangular slide barrel, and the other end of the pull rope passes through the limiting hole and the guide wheel in sequence and is fixedly connected to the upper side of the smoothing rod.

3. A sealing structure for food packaging according to claim 2, characterized in that: The guide wheel is provided with a limiting plate matching the pull rope.

4. A sealing structure for food packaging according to claim 1, characterized in that: The first limiting component includes a T-shaped slider, the T-shaped slider is fixedly arranged on the front side of the smoothing rod, and the slide groove is provided with a T-shaped slide groove matching the T-shaped slider.

5. A sealing structure for food packaging according to claim 1, characterized in that: The second limiting assembly includes two second limiting members symmetrically arranged on the left and right sides, the left and right sides of the smoothing rod extend out of the sliding groove, and the two second limiting members are respectively connected to the left and right sides of the smoothing rod, the second limiting member includes an L-shaped gear rod, a multi-stage telescopic rod, a second spring, a stopper and a limit block, the L-shaped gear rod is fixedly connected to the mounting plate, and the L-shaped gear rod opens downward, the multi-stage telescopic rod is fixedly connected to the L-shaped gear rod in a vertical direction, the stopper is fixedly connected to the lower end of the multi-stage telescopic rod, the second spring is fixedly arranged between the L-shaped gear rod and the upper side of the stopper, and the second spring is sleeved on the outside of the multi-stage telescopic rod, and the limit block is fixedly connected to the smoothing rod; the left and right sides of the rectangular sliding barrel are provided with through grooves matching the limit blocks.

6. A sealing structure for food packaging according to claim 5, characterized in that: The lower end of the L-shaped gear lever and the smoothing rod are both provided with guiding inclined surfaces.

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