Bag sealing machine for moisture-proof packaging bag

Abstract

The utility model discloses a bag sealing machine for a moisture-proof packaging bag, which belongs to the field of film production equipment, and is characterized in that two sides of two moisture-proof films are folded towards the middle by utilizing a flanging roller respectively, so that the non-moisture-proof side of a one-way moisture-proof film covers part of the moisture-proof side, and then a heating wheel on a pre-pressing roller is propped against a folding part, so that the films at the folding part are fused and bonded; at the moment, due to the fact that the moisture-proof sides of the two one-way moisture-proof films face the closed space, and the peripheries of the two one-way moisture-proof films are bonded through the non-moisture-proof sides, the moisture-proof sides are completely covered and wrapped by the non-moisture-proof sides, and therefore the moisture-proof performance of the moisture-proof sides on the interior of the bag body is kept in the optimal state and cannot be affected by changes of the external moisture degree.

Description

Technical Field

[0001] This utility model discloses a sealing machine for moisture-proof packaging bags, belonging to the field of film production equipment. Background Technology

[0002] Packaging bags are bags used to package goods.

[0003] Most existing food packaging bags require the inclusion of desiccants to prevent the food from getting damp. However, since desiccants are placed inside the food, there is a risk of accidental ingestion. While existing packaging bags are made by pressing one-way moisture-proof films, these products have strong moisture-absorbing properties on one side. However, the production of one-way moisture-proof films involves laminating moisture-absorbing materials in the middle of the film, and the surface has numerous micropores. These micropores connect with the outside environment, causing external moisture to be drawn into the film. While this may not be a concern in the short term, the moisture-proof function of these bags will disappear over longer storage periods or during humid seasons such as rainy seasons.

[0004] A new approach is now offered to maximize the use of such packaging bags. Utility Model Content

[0005] The purpose of this invention is to provide a sealing machine for moisture-proof packaging bags in order to solve the above-mentioned problems.

[0006] This utility model achieves the above-mentioned objective through the following technical solution: a sealing machine for moisture-proof packaging bags includes a machine body. The machine body is rotatably equipped with a pre-pressure roller for pressing two layers of moisture-proof film, a folding device for folding the opening inward, a flanging roller for folding the middle of both sides of the moisture-proof film, and a sealing roller for completely sealing the packaging bag. The folding device is disposed between the pre-pressure roller and the sealing roller. The pre-pressure roller includes an abutment roller for clamping and moving the moisture-proof film and a hot pressure roller located in the middle of the two abutment rollers. The hot pressure roller is provided with a notch that does not contact the moisture-proof film.

[0007] Preferably, the folding device includes a folding head and a cylinder for pushing the folding head to move. The folding head is provided with a plurality of air suction holes, which can be sealed to the moisture-proof film. A folding pressure head is rotatably provided on the folding head, and an adsorption hole is provided on the folding pressure head, which can be sealed to the moisture-proof film. The folding pressure head can be rotated to overlap with the moving direction of the folding head.

[0008] Preferably, an airtight silicone pad is adhered to the folding head, and the airtight silicone pad covers the folding head and is adhered to the folding head.

[0009] Preferably, a high-frequency generator is provided on the folded edge.

[0010] Preferably, the folded edges are symmetrically arranged, and a cutting blade for cutting the moisture-proof film is provided in the middle.

[0011] Preferably, the flanging roller has a flanging wheel that can rotate with it axially slidably on its surface, and a pressing element that cooperates with the flanging wheel is fixedly installed on the machine body.

[0012] Compared with the prior art, the beneficial effects of this utility model are as follows: Two moisture-proof films are folded towards the middle using a folding roller, so that the non-moisture-proof side of the unidirectional moisture-proof film partially covers the moisture-proof side. Then, a heating wheel on the pre-press roller abuts against the folded area, causing the film at the folded area to melt and bond. Because the heating wheel has a notch, a portion of the side is not bonded. At this point, the material continues to advance to the folding device, where the non-moisture-proof side is folded towards the moisture-proof side to partially cover it, and the folded area of ​​the two films is then heat-pressed to seal it. Next, the material continues to move to the sealing roller. At this time, the sealing roller will press the two moisture-proof films together again along the heating wheel path of the pre-pressing roller to completely seal three sides. The packaged item can then be placed between the two moisture-proof films. After placement, the material moves forward to the next unbonded area and overlaps with the folding device. The folding device will then fold and seal the remaining opening. Finally, the material enters the sealing roller to achieve a completely sealed opening. Since the moisture-proof sides of the two unidirectional moisture-proof films face the sealed space and are bonded around the perimeter with the non-moisture-proof side, the moisture-proof side is completely covered and wrapped by the non-moisture-proof side. This ensures that the moisture-proof side maintains optimal moisture-proof performance inside the bag and is not affected by changes in external humidity levels. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model;

[0014] Figure 2 for Figure 1 A structural diagram from another perspective;

[0015] Figure 3 for Figure 2 A structural schematic diagram of a partially enlarged view;

[0016] Figure 4 This is a schematic diagram of the bending head in the bending state;

[0017] Figure 5 This is a schematic diagram of the structure for resetting the pressure head after completing its action;

[0018] Figure 6 A schematic diagram of the structure of the flange roller and the pressing element in conjunction with a unidirectional moisture-proof film;

[0019] Figure 7 for Figure 6 3D diagram;

[0020] Figure 8 This is a schematic diagram of the preload roller structure;

[0021] Figure 9 This is a layer structure diagram of a one-way moisture-proof membrane;

[0022] Figure 10 This is a schematic diagram of the structure of a moisture-proof packaging bag after it has been sealed.

[0023] Reference numerals: 1. Machine body; 2. Flanging roller; 3. Edge pressing component; 4. One-way moisture-proof film; 41. Base layer; 42. Moisture-absorbing color-changing powder; 43. Positioning layer; 44. Plant layer; 45. Sealing layer; 46. Adhesive layer; 47. Ventilation hole; 48. Drying bead; 49. Moisture-wicking yarn; 51. Abutting roller; 52. Hot pressing roller; 53. Notch; 6. Sealing roller; 7. Folding device; 71. Cylinder; 72. Folding head; 73. Folding pressure head; 74. Cutting knife. Detailed Implementation

[0024] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings. In the description of the present utility model, it should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "top," "bottom," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing the present utility model and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present utility model.

[0025] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , Figure 7 , Figure 8As shown, a sealing machine for moisture-proof packaging bags includes a machine body 1. The machine body 1 is rotatably equipped with a pre-pressure roller for pressing two layers of moisture-proof film, a folding device 7 for folding the opening inwards, a flanging roller 2 for folding the middle of both sides of the moisture-proof film, and a sealing roller 6 for completely sealing the packaging bag. The folding device 7 is disposed between the pre-pressure roller and the sealing roller 6. The pre-pressure roller includes an abutment roller 51 for clamping and moving the moisture-proof film and a heat-pressing roller located in the middle of the two abutment rollers 51. 52. The hot pressing roller 52 is provided with a notch 53 that does not contact the moisture-proof film. The folding device 7 includes a folding head 72 and a cylinder 71 for pushing the folding head 72 to move. The folding head 72 is provided with a number of air suction holes, which can be sealed to the moisture-proof film. A folding pressure head 73 is rotatably provided on the folding head 72. The folding pressure head 73 is provided with an adsorption hole, which can be sealed to the moisture-proof film. The folding pressure head 73 can be rotated to overlap with the moving direction of the folding head 72.

[0026] like Figure 9 , Figure 10 As shown, the moisture-proof membrane used in this equipment is a one-way moisture-proof membrane 4, which includes: a base layer 41, a positioning layer 43 laminated on the base layer 41, wherein the positioning layer 43 has evenly distributed positioning recesses, and also includes desiccant beads 48 placed on the positioning recesses, a plant layer 44 laminated on the positioning layer 43, and an adhesive layer 46 laminated on the plant layer 44. The base layer has waterproof and air-tight functions, the desiccant beads 48 are used to absorb moisture in the air, the plant layer 44 is used to adhere and fix the desiccant beads 48, and the adhesive layer 46 has several breathable parts. Hole 47 and bonding layer 46 are used to expose the drying beads 48 to the air. The drying beads 48 have a series hole in the middle. Several drying beads 48 are connected in series by moisture-wicking yarn 49. Plant layer 44 is formed by co-extrusion of hot melt adhesive mixed with moisture-absorbing and color-changing powder 42. The hot melt adhesive in plant layer 44 is mixed with a foaming agent that can form gaps inside plant layer 44. A sealing layer 45 is provided between bonding layer 46 and plant layer 44 to separate plant layer 44 from the outside. The sealing layer 45 has a vent hole at the drying bead 48 that connects to the vent hole 47.

[0027] When using this product, first install the aforementioned one-way moisture-proof film 4 above the machine body 1. Then, thread the film along the direction of the flanging roller 2, pre-pressure roller, folding device 7, and sealing roller 6. After threading, start the equipment. When the entire roll of moisture-proof film passes through the flanging roller 2, the two sides of the reverse moisture-proof film are lifted due to the abutment of the flanging roller 2, and then folded towards the bonding layer 46. Then, as the equipment runs, the one-way moisture-proof film 4 with its folded edges enters the pre-pressure roller. The abutment roller 51 on the pre-pressure roller abuts and clamps the folded part of the two layers of one-way moisture-proof film 4, and then drags the moisture-proof film to move. At this time, the hot pressure roller 52 contacts the one-way moisture-proof film 4, causing the edges of the one-way moisture-proof film 4 to melt and bond, achieving a pre-fixing effect, until the one-way moisture-proof film 4 moves to the notch 53 of the hot pressure roller 52. At this point, since the hot pressing roller 52 is not in contact with the one-way moisture-proof film 4, the one-way moisture-proof film 4 will not adhere to each other. The abutment roller 51 continues to rotate, causing the unadhesive part of the one-way moisture-proof film 4 to move to the folding device 7. The cylinder 71 of the folding device 7 pushes the folding head 72 towards the one-way moisture-proof film 4. Because the folding head 72 has an air suction hole, the one-way moisture-proof film 4 is adsorbed. The cutting blade 74 on the cutting head cuts the one-way moisture-proof film 4. Then, the cylinder 71 moves back to the initial position, causing the folding head 72 to pull the two layers of one-way moisture-proof film 4, separating them by a sufficient distance. Then, the suction hole on the folding head 73 adsorbs the one-way moisture-proof film 4. At the same time, the folding head 73 is driven by the motor to rotate, causing the one-way moisture-proof film 4 to rotate with it. Since the cutting head remains stationary, while the folding head... The head 73 rotates, causing the one-way moisture-proof film 4 to be folded. Once the one-way moisture-proof film 4 is folded 180°, the adsorption pores stop adsorbing the one-way moisture-proof film 4. The folding head 73 is then pulled back to its original position by the motor. Because of the inherent toughness of the one-way moisture-proof film 4, it does not immediately follow the folding head 73 back to its original position. Therefore, after the folding head 73 returns to its original position, the one-way moisture-proof film 4 remains in a folded state and is not affected by gravity, remaining vertical. At this point, the cylinder 71 pushes the cutting head to move, thereby pushing the folded portions of the two one-way moisture-proof films 4 to adhere to each other. Then, a high-frequency wave is used to seal the folded area. At this point, the openings of the two one-way moisture-proof films 4 along the vertical direction are sealed. Then, the material is subjected to gravity and the thrust of the abutment wheel 51. The device continues to move downwards to the sealing roller 6, where it presses the side of the one-way moisture-proof film 4 again to seal the area reserved for folding space in the vertical direction. After sealing, the packaged item can be placed inside. The device continues to operate. When the vertical opening of the two layers of one-way moisture-proof film 4 moves to the folding head 7, the folding head 72 and the folding pressure head 73 are symmetrically arranged. When the folding head 7 is operated again, the upper opening of the one-way moisture-proof film 4 can be folded and sealed. Finally, the one-way moisture-proof film 4 with the opening sealed enters the sealing roller 6, thus sealing the entire packaging bag. At this point, since the moisture-proof side of the one-way moisture-proof film 4 is facing the inside of the packaging bag, and the outer sealing edge is all on the non-moisture-proof side of the one-way moisture-proof film 4, the device completes the sealing process.Therefore, any unidirectional moisture-proof membrane can be used as, Figure 10 The effect of the moisture-proof packaging bag shown.

[0028] like Figure 3 , Figure 4 , Figure 5 As shown, an airtight silicone pad is adhered to the folding head 72, which covers and adheres to the folding head 73. The airtight silicone pad has a relatively soft contact surface, which avoids the possibility of the one-way moisture-proof film 4 being punctured due to the hardness of the folding head 72 when it is adsorbed on the folding head 72. In addition, the airtight silicone pad can better allow the one-way moisture-proof film 4 to be adsorbed.

[0029] A high-frequency generator is installed on the folding head 72. The high-frequency generator is used to remotely heat the one-way moisture-proof film 4, and heats it directly from the contact point of the two layers of one-way moisture-proof film 4, so as to better achieve the sealing of the packaging bag.

[0030] The folding heads 72 are symmetrically arranged, and a cutting blade 74 for cutting the moisture-proof film is provided in the middle. The cutting blade 74 is arranged so that the folding heads 7 can cut the one-way moisture-proof film 4 when they are close to each other, and then seal the upper and lower openings at the same time.

[0031] like Figure 6 , Figure 7 As shown, the flanging roller 2 has a flanging wheel that can rotate with it and slides along the axial direction on its surface. The machine body 1 is fixedly equipped with a pressing part 3 that cooperates with the flanging wheel. The pressing part 3 makes the one-way moisture-proof film 4 more stable when folding the side edge. At the same time, the sliding setting allows one-way moisture-proof films 4 of different widths to be used stably.

[0032] It will be apparent to those skilled in the art that this invention is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this invention. Therefore, the embodiments should be considered illustrative and non-limiting in all respects, and the scope of this invention is defined by the appended claims rather than the foregoing description. Thus, it is intended that all variations falling within the meaning and scope of equivalents of the claims be included within this invention. No reference numerals in the claims should be construed as limiting the scope of the claims.

[0033] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A sealing machine for moisture-proof packaging bags, characterized in that, The machine includes a body on which a pre-pressure roller for pressing two layers of moisture-proof film, a folding device for folding the opening inward, a flanging roller for folding the middle of both sides of the moisture-proof film, and a sealing roller for completely sealing the packaging bag are rotatably arranged. The folding device is disposed between the pre-pressure roller and the sealing roller. The pre-pressure roller includes an abutment roller for clamping and moving the moisture-proof film and a hot pressure roller located in the middle of the two abutment rollers. The hot pressure roller is provided with a notch that does not contact the moisture-proof film.

2. The sealing machine for moisture-proof packaging bags according to claim 1, characterized in that: The folding device includes a folding head and a cylinder for pushing the folding head to move. The folding head is provided with a plurality of air suction holes, which can be sealed to the moisture-proof film. A folding pressure head is rotatably provided on the folding head, and an adsorption hole is provided on the folding pressure head, which can be sealed to the moisture-proof film. The folding pressure head can be rotated to overlap with the moving direction of the folding head.

3. The sealing machine for a moisture-proof packaging bag according to claim 2, characterized in that: An airtight silicone pad is adhered to the folding head, and the airtight silicone pad covers the folding head and is adhered to the folding head.

4. The sealing machine for a moisture-proof packaging bag according to claim 3, characterized in that: A high-frequency generator is provided on the folded edge.

5. A sealing machine for moisture-proof packaging bags according to claim 2, characterized in that: The folded edges are symmetrically arranged, and a cutting blade for cutting the moisture-proof film is provided in the middle.

6. The sealing machine for a moisture-proof packaging bag according to claim 1, characterized in that: The flanging roller has a flanging wheel that can rotate with it axially slidably on its surface, and a pressing element that cooperates with the flanging wheel is fixedly installed on the machine body.

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