Automatic heat sealing machine for inner film bag

Abstract

The utility model is applicable to the field of heat sealing machines, and provides an automatic heat sealing machine for an inner film bag, which comprises a frame body, a bag body placing space is arranged in the frame body; a bag body outer supporting structure, a bag opening hot melting mechanism and a vacuumizing structure are arranged at the positions, corresponding to a bag opening of the bag body, above the bag body containing space. The bag body outer supporting structure comprises at least one pair of outer supporting frames; each outer supporting frame is provided with a working face attached to the bag body, and a negative pressure opening is formed in each working face. The bag opening hot melting mechanism comprises at least one pair of hot melting devices; the vacuumizing structure comprises a negative pressure nozzle and a negative pressure nozzle driver; and the negative pressure port and the negative pressure nozzle are respectively connected with negative pressure supply equipment, so that the inner film bag is vacuumized through the vacuumizing structure before the bag opening of the inner film bag is sealed in a hot melting manner, so that the inner film bag is in a wizened state, on one hand, gas in the bag is driven to be exhausted, and on the other hand, the stability of the hot melting sealing is improved.

Description

Technical Field

[0001] The utility model relates to the field of heat sealing machines, in particular to an automatic heat sealing machine for inner film bags. Background Art

[0002] At present, most materials are packaged in nylon bags. During the use of nylon bags, they are often not used in a single layer, but an inner film bag (also called an inner liner) is placed inside the nylon bag. It is generally used to isolate moisture and prevent materials from condensing into lumps (such as some fertilizers) or even mildew (such as grain, flour, etc.).

[0003] Among them, the sealing method of the inner film bag is hot melt sealing, which is achieved by clamping and closing the bag mouth of the inner film bag with relatively arranged electric hot melt plates. In the above sealing process, the gas in the inner film bag is not discharged, which will not only make some moisture remain in the inner film bag, but also affect the quality of the material inside it. Another important aspect is that it will affect the hot melt sealing work. Specifically, when the hot melt sealing work is performed, the electric hot melt plate clamps the seal, and a certain air pressure will be formed in the inner film bag. This air pressure will cause the inner film bag body to expand, further resulting in unstable connection at the hot melt seal.

[0004] In summary, the prior art obviously has inconveniences and defects in practical use, so it is necessary to improve it. Utility Model Content

[0005] In view of the above-mentioned defects, the purpose of the utility model is to provide an automatic heat sealing machine for inner film bags, which can use a vacuum structure to vacuum the inside of the inner film bag before hot-melt sealing the bag opening, so that it is in a "deflated" state. On the one hand, it drives the gas in the bag to be discharged, and on the other hand, it increases the stability of the hot-melt seal.

[0006] In order to achieve the above-mentioned purpose, the utility model provides an automatic heat sealing machine for inner film bags, comprising a frame; a bag placement space is arranged in the frame; a bag outer support structure, a bag opening hot melt mechanism and a vacuum structure are arranged above the bag placement space corresponding to the bag opening of the bag; the bag outer support structure comprises at least one pair of outer support frames; the paired outer support frames are arranged relative to each other and can be driven by a driver to approach or move away from each other; each of the outer support frames is provided with a working surface that fits the bag body, and a negative pressure port is provided on the working surface; the bag opening hot melt mechanism comprises at least one pair of hot melters; the paired hot melters are arranged relative to each other and can be driven by the driver to approach or move away from each other; the vacuum structure comprises a negative pressure nozzle and a negative pressure nozzle driver that drives the negative pressure nozzle to extend into the bag body or be pulled out of the bag body; the negative pressure port and the negative pressure nozzle are each connected to a negative pressure supply device.

[0007] According to the automatic heat sealing machine for inner film bags of the utility model, a conveying structure for conveying the bags is arranged in the frame; and the bag placement space is located above the conveying structure.

[0008] According to the inner film bag automatic heat sealing machine of the utility model, the negative pressure nozzle driver drives the negative pressure nozzle to move up and down in the vertical direction.

[0009] According to the automatic heat sealing machine for inner film bags of the utility model, the outer support structure of the bag body includes two pairs of outer support frames arranged upper and lower.

[0010] According to the automatic heat sealing machine for inner film bags of the utility model, the frame is also provided with a clamping mechanism for positioning the bag body; the clamping mechanism includes at least one pair of clamping plates; the paired clamping plates are arranged relatively to each other and can be driven by a driver to move closer to or farther away from each other.

[0011] According to the automatic heat sealing machine for inner film bags of the utility model, the clamping plate is installed on a first movable frame; the first movable frame moves along the conveying direction of the conveying structure; the frame is provided with a first track for installing the first movable frame, and the first movable frame is slidably installed on the first track.

[0012] According to the inner film bag automatic heat sealing machine of the utility model, a structure for tamping the inner film bag is also arranged on the frame; the structure for tamping the inner film bag includes a tamping head and a tamping head driver for driving the tamping head to move and press the inner film bag seal into the outer bag.

[0013] According to the automatic heat sealing machine for inner film bags of the utility model, a sealing rubber layer is arranged on the working surface of the outer support frame to increase the fit between the outer support frame and the bag body and further improve the negative pressure sealing performance.

[0014] According to the automatic heat sealing machine for inner film bags of the utility model, the vacuum extraction structure, the bag outer supporting structure and the inner film bag tamping structure are all installed on a second movable frame; the second movable frame moves horizontally and is perpendicular to the conveying direction of the conveying structure; a second track for installing the second movable frame is provided on the frame, and the first movable frame is slidably installed on the second track.

[0015] The utility model provides an automatic heat sealing machine for inner film bags, comprising a frame; a bag placement space is arranged inside the frame; a bag outer support structure, a bag opening hot melting mechanism and a vacuum pumping structure are arranged above the bag placement space corresponding to the bag opening position of the bag; and a conveying structure for conveying the bag is arranged below the bag placement space, wherein the conveying structure can adopt a traditional conveyor belt mechanism. After the conveyor belt mechanism conveys the bag to a predetermined working position, in order to stabilize the working state of the bag and ensure the normal operation of the sealing and other operations, the frame is also provided with a clamping mechanism for positioning the bag; the clamping mechanism includes at least one pair of clamping plates, the shape of which can be adaptively selected to adapt to the shape of the outer periphery of the bag, and the clamping plates are selected to be arc plates; the paired clamping plates are arranged relatively and driven by a driver (the driver can be selected to be a cylinder) to approach or move away from each other, the clamping plates approaching each other clamp and fix the bag, while the clamping plates away from each other cancel the fixation of the bag. Since there is a slight error in the predetermined working position where the bag is transported by the conveyor belt mechanism each time, the position of the clamping mechanism also needs to be adaptively adjusted. The specific adjustment structure is as follows: the clamping plate is installed on a first mobile frame; the first mobile frame moves along the conveying direction of the conveying structure; the frame is provided with a first track for installing the first mobile frame, and the first mobile frame is slidably installed on the first track through a moving seat, and the moving seat includes a seat body sleeved outside the first track and a plurality of rollers rotatably installed in the seat body, and the rollers can be non-driving wheels (in this case, the first mobile frame adopts hand-held drive), or can be driven to rotate by electric drive (motor drive) and other methods; a plurality of rollers are rollingly installed on the first track. The utility model uses a vacuuming structure to vacuum the inner film bag before hot-melt sealing the bag mouth of the inner film bag, so that it is in a "shrunken" state, which drives the gas in the bag to be discharged on the one hand, and increases the stability of the hot-melt seal on the other hand. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view of the utility model;

[0017] Figure 2 It is a side view of the utility model;

[0018] Figure 3 It is a three-dimensional diagram of the first state of the utility model;

[0019] Figure 4 yes Figure 3 A magnified view of part A;

[0020] Figure 5 It is a stereogram of the second state of the utility model;

[0021] In the figure, 00-bag body, 01-bag body placement space, 1-frame, 2-vacuum structure, 21-negative pressure nozzle, 22-negative pressure nozzle driver, 31-clamping plate, 32-first movable frame, 33-first track, 34-movable seat, 341-seat, 342-roller, 4-bag opening hot melting mechanism, 41-hot melter, 51-outer support frame, 52-negative pressure port, 7-ramming inner film bag structure, 71-ramming head, 82-second movable frame, 83-second track. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0023] See also Figure 1 and Figure 2 The utility model provides an automatic heat sealing machine for inner film bags, which includes a frame 1; a bag placement space 01 is arranged inside the frame 1; a bag body outer support structure, a bag mouth hot melting mechanism 4 and a vacuum structure 2 are arranged above the bag body placement space corresponding to the bag mouth position of the bag body; and a conveying structure for conveying the bag body is arranged below the bag body placement space 01, wherein the conveying structure can adopt a traditional conveyor belt mechanism (which is an existing structure).

[0024] Preferably, after the conveyor belt mechanism conveys the bag body 00 to the predetermined working position, in order to stabilize the working state of the bag body 00 and ensure the normal operation of sealing and other operations, the frame 1 is also provided with a clamping mechanism for positioning the bag body 00; the clamping mechanism includes at least one pair of clamping plates 31, and the shape of the clamping plates 31 can be adaptively selected to adapt to the shape of the outer periphery of the bag body 00. Specifically in the present embodiment, the clamping plates 31 are selected to be arc-shaped plates; the paired clamping plates 31 are relatively arranged and driven by a driver (the driver can be selected to be a cylinder) to approach or move away from each other, and the clamping plates 31 that are close to each other clamp and fix the bag body 00, while the clamping plates 31 that are far away from each other cancel the fixation of the bag body 00.

[0025] See also Figure 3 and Figure 4 In addition, since there is a slight error in the predetermined working position where the conveyor belt mechanism conveys the bag body 00 each time, the position of the clamping mechanism also needs to be adaptively adjusted. The specific adjustment structure is as follows: the clamping plate 31 is installed on a first movable frame 32; the first movable frame moves along the conveying direction of the conveying structure;

[0026] The frame 1 is provided with a first track 33 for installing a first movable frame 32, and the first movable frame 32 is slidably installed on the first track 33 (specifically in the present embodiment, the first track 33 is a bare rod) through a movable seat 34. The movable seat 34 includes a seat body 341 which is sleeved outside the first track 33 and a plurality of rollers 342 which are rotatably installed in the seat body 341. The rollers 342 can be non-driven wheels (in this case, the first movable frame 32 is hand-held driven), or can be driven to rotate by electric drive (motor drive) or the like; the plurality of rollers 342 are rollingly installed on the first track 33.

[0027] The outer support structure of the bag body includes at least a pair of outer support frames 51. Specifically in the present embodiment, the outer support structure of the bag body includes two upper and lower outer support frames 51, wherein the pair of outer support frames 51 located at the upper position is the inner membrane bag outer support group, and the pair of outer support frames 51 located at the lower position is the outer bag outer support group; the paired outer support frames 51 are relatively arranged and driven by a driver (electric cylinder or air cylinder) to approach or move away from each other, wherein specifically in the present embodiment, the paired outer support frames 51 of the outer bag outer support group and the inner membrane bag outer support group are placed on both sides of the bag body placement space 01 and move toward or away from each other in a horizontal manner; each of the outer support frames 51 is provided with a working surface that fits the bag body 00, and a negative pressure port 52 is provided on the working surface, and the negative pressure port 52 is connected to an external negative pressure supply device (for example, a negative pressure air pump can be connected through an air hose). When the bag body 00 is supported externally by the external support structure, the driver drives the paired external support frames 51 to approach each other. After the working surface of the external support frame 51 is in contact with the outer wall of the bag body opening (the inner membrane bag opening or the outer bag opening), the negative pressure port 52 generates negative pressure and absorbs the outer wall of the bag body opening. Subsequently, the paired external support frames 51 move away from each other, and the external support frames 51 drive the bag body opening to achieve external support.

[0028] Preferably, a sealing rubber layer is provided on the working surface of the external support frame 51 to increase its fit with the bag body and further improve the negative pressure sealing performance. The sealing rubber layer is soft and deformable, which can optimize the fit between the working surface of the external support frame 51 and the bag body and ensure the negative pressure external support effect of the external support frame 51.

[0029] See also Figure 1 and Figure 5The vacuum pumping structure 2 includes a negative pressure nozzle 21 and a negative pressure nozzle driver 22 that drives the negative pressure nozzle 21 to extend into the bag body 00 or be drawn out from the bag body 00. Specifically in the present embodiment, the negative pressure nozzle driver 22 (electric cylinder or air cylinder) drives the negative pressure nozzle 21 to move up and down in the vertical direction; the negative pressure nozzle 21 is connected to a negative pressure supply device (for example, a negative pressure air pump can be connected via an air hose). When the vacuum pumping operation is performed, after the bag body opening is supported externally by the bag outer support structure, the negative pressure nozzle driver 22 drives the negative pressure nozzle 21 to move downward and extend into the bag opening of the inner membrane bag, and the negative pressure nozzle 21 starts negative pressure adsorption, and at the same time, the outer support group of the inner membrane bag cancels the outer support effect on the bag opening of the inner membrane bag. Finally, the inner membrane bag is in a "shrunken" state under the action of negative pressure, and the bag opening of the inner membrane bag is closed.

[0030] The bag mouth hot melt mechanism 4 includes at least one pair of hot melters 41. Specifically in this embodiment, the hot melters 41 are a pair and can be an electric hot melt plate; the paired hot melters 41 are relatively arranged and driven by a driver (electric cylinder or air cylinder) to move closer to or farther away from each other. When the bag mouth hot melt mechanism 4 performs the sealing work, the hot melters 41 are first in a heated state, and then the driver drives the paired hot melters 41 to move closer to each other, and clamp and melt the outer wall of the bag mouth of the inner film bag in a vacuum state to achieve the sealing work. After the sealing is completed, the driver drives the paired hot melters 41 away. It needs to be explained that in order to avoid the negative pressure nozzle 21 from interfering with the hot melt sealing work, the insertion position of the negative pressure nozzle 21 should be higher than the bag mouth hot melt position (generally, the insertion position of the negative pressure nozzle 21 should be about 5 cm away from the bag mouth, and the bag mouth hot melt position should be about 10 cm away from the bag mouth).

[0031] See also Figure 1 and Figure 2 Preferably, in order to place the bag opening of the inner film bag after hot-melt sealing in the outer bag to avoid affecting the sealing work of the outer bag in the next step (not involved in this application), the utility model has made the following improvements: the frame 1 is also provided with a structure 7 for tamping the inner film bag; the structure for tamping the inner film bag includes a tamping head 71 and a tamping head driver 72 (an electric cylinder or a pneumatic cylinder) that drives the tamping head 71 to move and press the inner film bag seal into the outer bag, and the tamping head 71 is fixedly connected to the output end of the tamping head driver 72. When the structure tamping the inner film bag 7 is working, the tamping head driver 72 drives the tamping head 71 to continuously extend into the outer bag and continuously press the inner film bag seal to press the inner film bag seal into the outer bag.

[0032] In addition, in order to ensure the position correspondence between the vacuum pumping structure 2, the bag outer supporting structure and the bag body 00, as well as the pressing work of the tamping inner film bag structure 7, the present invention installs the vacuum pumping structure 2, the bag outer supporting structure and the tamping inner film bag structure 7 on a second movable frame 82; the second movable frame 82 moves horizontally and is perpendicular to the conveying direction of the conveying structure, and the movement of the second movable frame 82 drives the components installed thereon to adjust the position; the frame 1 is provided with a second track 83 for installing the second movable frame 82, and the first movable frame 32 is slidably installed on the second track 83; the second movable frame 82 is driven by a cylinder to move along the direction of the second track 83.

[0033] When the device is used, the conveyor belt mechanism first conveys the bag body 00 to the predetermined working position, then the bag outer supporting structure supports the inner film bag and the bag mouth of the outer bag, the negative pressure nozzle 21 of the vacuuming structure 2 extends into the inner film bag to vacuumize, the bag mouth hot-melt mechanism 4 hot-melts and seals, and then the negative pressure nozzle 21 is withdrawn. Finally, the inner film bag tamping structure 7 works to press the inner film bag into the outer bag.

[0034] In summary, the utility model provides an automatic heat sealing machine for inner film bags, including a frame; a bag placement space is arranged inside the frame; a bag outer support structure, a bag mouth hot melting mechanism and a vacuum pumping structure are arranged above the bag placement space corresponding to the bag mouth position of the bag; and a conveying structure for conveying the bag is arranged below the bag placement space, wherein the conveying structure can adopt a traditional conveyor belt mechanism. After the conveyor belt mechanism conveys the bag to a predetermined working position, in order to stabilize the working state of the bag and ensure the normal operation of sealing and other operations, the frame is also provided with a clamping mechanism for positioning the bag; the clamping mechanism includes at least one pair of clamping plates, the shape of which can be adapted to the shape of the outer periphery of the bag body and adaptively selected, and the clamping plates are selected as arc plates; the paired clamping plates are arranged relatively and driven by a driver (the driver can be selected as a cylinder) to approach or move away from each other, and the clamping plates that are close to each other clamp and fix the bag, while the clamping plates that are far away from each other cancel the fixation of the bag. Since there is a slight error in the predetermined working position where the bag is transported by the conveyor belt mechanism each time, the position of the clamping mechanism also needs to be adaptively adjusted. The specific adjustment structure is as follows: the clamping plate is installed on a first mobile frame; the first mobile frame moves along the conveying direction of the conveying structure; the frame is provided with a first track for installing the first mobile frame, and the first mobile frame is slidably installed on the first track through a moving seat, and the moving seat includes a seat body sleeved outside the first track and a plurality of rollers rotatably installed in the seat body, and the rollers can be non-driving wheels (in this case, the first mobile frame adopts hand-held drive), or can be driven to rotate by electric drive (motor drive) and other methods; a plurality of rollers are rollingly installed on the first track. The utility model uses a vacuuming structure to vacuum the inner film bag before hot-melt sealing the bag mouth of the inner film bag, so that it is in a "shrunken" state, which drives the gas in the bag to be discharged on the one hand, and increases the stability of the hot-melt seal on the other hand.

[0035] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field can make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. An automatic heat sealing machine for inner film bags, characterized in that: It comprises a frame; a bag placement space is arranged in the frame; a bag outer supporting structure, a bag opening hot-melt mechanism and a vacuum pumping structure are arranged above the bag placement space corresponding to the bag opening; The bag outer support structure comprises at least one pair of outer support frames; the pairs of outer support frames are arranged opposite to each other and can be moved closer or farther away from each other by being driven by a driver; each of the outer support frames is provided with a working surface that fits the bag body, and a negative pressure port is provided on the working surface; The bag opening hot-melt mechanism comprises at least one pair of hot-melt devices; the paired hot-melt devices are arranged opposite to each other and can be moved closer to or farther from each other by being driven by a driver; The vacuum pumping structure comprises a negative pressure nozzle and a negative pressure nozzle driver which drives the negative pressure nozzle to extend into the bag body or be drawn out from the bag body; the negative pressure port and the negative pressure nozzle are respectively connected to a negative pressure supply device.

2. The automatic heat sealing machine for inner film bags according to claim 1, characterized in that: The frame is provided with a conveying structure for conveying the bag; the bag placement space is located above the conveying structure.

3. The automatic heat sealing machine for inner film bags according to claim 1, characterized in that: The negative pressure nozzle driver drives the negative pressure nozzle to move up and down in the vertical direction.

4. The automatic heat sealing machine for inner film bags according to claim 1, characterized in that: The bag outer supporting structure comprises two outer supporting frames arranged up and down.

5. The automatic heat sealing machine for inner film bags according to claim 2, characterized in that: The frame is also provided with a clamping mechanism for positioning the bag body; The clamping mechanism comprises at least one pair of clamping plates; the paired clamping plates are arranged opposite to each other and can be moved closer to or farther from each other by being driven by a driver.

6. The automatic heat sealing machine for inner film bags according to claim 5, characterized in that: The clamping plate is installed on a first movable frame; the first movable frame moves along the conveying direction of the conveying structure; The frame is provided with a first track for installing the first movable frame, and the first movable frame is slidably installed on the first track.

7. The automatic heat sealing machine for inner film bags according to claim 6, characterized in that: The frame is also provided with a structure for tamping the inner film bag; the structure for tamping the inner film bag includes a tamping head and a tamping head driver that drives the tamping head to move and press the sealed inner film bag into the outer bag.

8. The automatic heat sealing machine for inner film bags according to any one of claims 1 to 6, characterized in that: A sealing rubber layer is arranged on the working surface of the outer support frame to increase the fit between the outer support frame and the bag body and further improve the negative pressure sealing performance.

9. The automatic heat sealing machine for inner film bags according to claim 7, characterized in that: The vacuum pumping structure, the bag outer supporting structure and the inner film bag tamping structure are all installed on a second movable frame; the second movable frame moves horizontally and is perpendicular to the conveying direction of the conveying structure; The frame is provided with a second track for installing the second movable frame, and the first movable frame is slidably installed on the second track.

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