Bag sucking and pressing combined device of packaging machine

Abstract

The utility model relates to a bag sucking and pressing combined device of a packaging machine, which comprises at least two suction nozzles and a moving mechanism, the suction nozzles are oppositely arranged and are provided with suction slopes inclined to the horizontal plane, and the moving mechanism drives the suction nozzles to move along the opposite direction of opening a plastic bag.

Description

Technical Field

[0001] The utility model relates to a combined mechanism, in particular to a bag suction and bag pressing combined device of a packaging machine. Background Art

[0002] Packaging machine is a kind of equipment used for automatic packaging of products, which is widely used in food, medicine, chemical industry, daily necessities and other industries. It can improve production efficiency, reduce labor costs, and ensure the consistency and quality of packaging.

[0003] The general process of the automatic packaging machine for the same film bag is: feeding the bag - cutting the bag - opening the bag (opening the bag) - loading the material - sealing. In order to reliably open the bag, the general process of opening the bag is: first open the bag with a small opening - press the bag edge - completely open the bag. The structure of the small opening of the bag is generally to use the vacuum suction nozzle set in the positive direction to suck the plastic film on both sides of the bag. The vacuum suction nozzle moves in the opposite direction and opens with a small displacement, so that the plastic can be opened to both sides, thereby achieving the effect of a small opening. In actual applications, due to process requirements, oily substances are sometimes added when producing bags, and the two sides of the film are in a vacuum state before the bag is opened, which makes it difficult to separate them to both sides. For some bags that have been placed for a long time, the plastic films on both sides will be in a slightly bonded state, and the suction nozzle will occasionally fall off when sucking the bag to open outward, making it difficult to separate them well during the automatic packaging process, which in turn affects subsequent packaging.

[0004] There are two common solutions to this situation. One is to improve the nozzle, such as improving the nozzle head structure, increasing the skirt diameter, and reducing the skirt thickness, so that it fits the plastic film more closely and does not fall off during the suction process. Or increase the number of elastic circles of the nozzle neck. During the suction process, the nozzle neck elasticity can be used to prevent the nozzle from falling off the plastic film. Or change the nozzle material to make it more elastic or have a certain degree of viscosity. The purpose is to prevent the nozzle from falling off during the suction process. Another direction is to increase the vacuum degree, change the brand of the vacuum generator, or use a vacuum pump to have sufficient vacuum degree and gas flow rate to provide the nozzle with a reliable suction of the plastic film.

[0005] The above two improvements can solve the problem of nozzle falling off to a certain extent, but there are two obvious disadvantages: increasing the size of the nozzle will affect the packaging capacity of the same bag, and increasing the vacuum degree of the vacuum generator will increase the production gas consumption and easily generate noise. Utility Model Content

[0006] In view of the shortcomings of the prior art, the utility model aims to provide a bag suction and bag pressing combined device for a packaging machine.

[0007] To achieve the above purpose, the suction nozzle is prevented from falling off during the movement. The essence of the problem is that after the suction nozzle sucks the plastic film, it moves to both sides, but the plastic film is not separated, which causes the suction nozzle head to separate from the plastic film, resulting in the entire suction nozzle falling off. However, the plastic mold close to the bag cutout is easy to separate relative to the plastic film far from the bag cutout. The utility model provides a technical solution based on the following basis: when separating the plastic films on both sides, the plastic film at the bag mouth is separated first, and then the plastic film is driven to separate downward. Relieve the adsorption force required for the vacuum suction nozzle. The technical solution is as follows: It includes a suction nozzle and a suction nozzle driving mechanism, at least two suction nozzles, the suction nozzles are arranged relative to each other and the suction nozzles have a suction slope inclined to the horizontal plane, the suction nozzle driving mechanism drives the suction nozzle to move along the relative direction of the plastic bag opening, and also includes a fixed plate and a movable plate, the suction nozzles are respectively arranged on the fixed plate and the movable plate and are arranged relative to each other, including a driver, the driver drives the movable plate to move in the direction close to and away from the fixed plate, and the suction nozzle is arranged inclined to the moving direction of the movable plate.

[0008] By adopting the above technical solution, when work is needed, the plastic bag is placed between the fixed plate and the movable plate, and then the suction nozzle sucks the plastic bag, and then the movable plate moves away from the fixed plate to open the plastic bag, and then the material can be put into the plastic bag, and then the movable plate approaches the fixed plate to close the plastic bag and finally seal it. When the suction nozzle sucks the plastic bag, the suction nozzle head is not perpendicular to the plastic bag, but at a certain angle, and the suction nozzle is soft and can fit the plastic bag completely at the angle. When the suction nozzle driving mechanism moves in the opposite direction, the edge of the suction nozzle does not They will leave the plastic bag at the same time, so that when the bag opening is opened, the plastic film closer to the bag opening will move outwards earlier than the plastic film farther away from the bag opening, making it easier to separate the plastic films on both sides, similar to the action of sipping by hand. Even if the inner side of the plastic bag is tightly combined, the plastic bag can be opened to ensure the normal subsequent packaging. After adopting this mechanism, a small vacuum generator and suction nozzle can be used, and the bag can be sucked open with normal pressure. However, in the market, because the film cannot be sucked open, a large suction vacuum generator is used, which makes a lot of noise, so this solution is quieter and more environmentally friendly.

[0009] The utility model is further configured as follows: the nozzle driving mechanism is respectively arranged on the fixed plate and the movable plate and drives the nozzle to move along the moving direction of the movable plate.

[0010] By adopting the above technical solution, before opening the plastic, the nozzle driving mechanism drives the nozzle to approach the plastic bag. After the nozzle sucks the plastic bag, the nozzle driving mechanism drives the nozzle to move back to preliminarily open the plastic bag.

[0011] The utility model is further configured to include: a bag pressing fixed block, a bag pressing block and a bag pressing cylinder, the bag pressing fixed block is respectively arranged on the fixed plate and the movable plate, the bag pressing cylinder is respectively arranged on the fixed plate and the movable plate and drives the bag pressing block to move in the direction approaching and away from the bag pressing fixed block, and the bag pressing fixed block, the bag pressing block and the bag pressing cylinder constitute a bag pressing mechanism.

[0012] By adopting the above technical solution, when the suction nozzle drives the plastic bag film to move to both sides, the plastic bag film enters between the bag pressing fixing block and the bag pressing block, and then the bag pressing cylinder drives the bag pressing block to move, thereby fixing the plastic bag. At this time, the suction nozzle no longer needs to provide suction.

[0013] There are at least two pairs of suction nozzles, and the bag pressing mechanism is arranged between the two pairs of suction nozzles.

[0014] The utility model is further configured as follows: the suction nozzle is arranged horizontally and faces the plastic bag, and the angle between the arrangement direction of the suction slope and the horizontal plane is less than sixty degrees and greater than zero degrees.

[0015] The utility model is further configured as follows: a guide rod is arranged between the fixed plate and the movable plate.

[0016] The utility model is further configured to include a sealing cylinder and a sealing member, wherein the sealing cylinder is arranged on the fixing plate and drives the sealing member to seal the plastic bag.

[0017] By adopting the above technical solution, the sealing member seals the filled plastic bag by heating.

[0018] The utility model is further configured to include: a material receiving funnel, which is arranged above the fixed plate and the movable plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the utility model in which some components are omitted;

[0021] Figure 3 For this utility model Figure 2 A partial enlarged view of middle A;

[0022] Figure 4 It is a side view of the suction nozzle of the utility model;

[0023] Figure 5 This is the test data table of the normal plastic bag of this utility model being sucked open 500 times;

[0024] Figure 6 This is a test data sheet of a plastic bag in which two films of the utility model are bonded at some places and sucked open 500 times.

[0025] In the figure: 2, fixed plate; 21, guide rod; 3, movable plate; 4, driver; 5, suction nozzle; 51, suction slope; 6, suction nozzle driving mechanism; 7, bag pressing fixed block; 71, bag pressing block; 72, bag pressing cylinder; 8, sealing part; 81, cutter cylinder; 82, cutter part; 9, collecting funnel. DETAILED DESCRIPTION

[0026] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0028] like Figure 1-6As shown, the utility model discloses a bag suction and pressing combined device of a packaging machine, including a suction nozzle 5 and a suction nozzle driving mechanism 6, there are at least two suction nozzles 5, the suction nozzles 5 are arranged opposite to each other and the suction nozzles 5 have a suction slope 51 inclined to the horizontal plane, the suction nozzle driving mechanism 6 drives the suction nozzle 5 to move along the relative direction of opening the plastic bag, and also includes a fixed plate 2 and a movable plate 3, the suction nozzles 5 are respectively arranged on the fixed plate 2 and the movable plate 3 and are arranged opposite to each other, the movable mechanism includes a driver 4, the driver 4 drives the movable plate 3 to move in the direction of approaching and moving away from the fixed plate 2, the suction nozzle 5 is arranged inclined to the moving direction of the movable plate 3, when it is necessary to work, the plastic bag is placed between the fixed plate 2 and the movable plate 3, and then the suction nozzle 5 sucks the plastic bag, and then the movable plate 3 is away from the fixed plate 2, so that the plastic bag is opened, and then the material can be put into the plastic bag, and then the movable plate 3 is close to the fixed plate 2 again, so that the plastic bag When the suction nozzle 5 sucks the plastic bag, the suction nozzle 5 is not perpendicular to the plastic bag, but there is a certain angle between them, and the suction nozzle 5 is soft and can fit the plastic bag perfectly at the angle. When the suction nozzle driving mechanism 6 moves in the opposite direction, the edge of the suction nozzle 5 will not leave the plastic bag at the same time. Therefore, when the bag opening of the plastic bag is opened, the plastic film closer to the bag opening will move outward earlier than the plastic film farther from the bag opening, making it easier to separate the plastic films on both sides, similar to the action of sucking by hand. Even if the inner side of the plastic bag is tightly combined, the plastic bag can be opened to ensure the normal subsequent packaging. After adopting this mechanism, a small vacuum generator and suction nozzle 5 can be used, and the bag can be sucked open with normal pressure. However, in the market, a large suction vacuum generator is used because the film cannot be sucked open, and the noise is relatively large. Therefore, this solution is quieter and more environmentally friendly.

[0029] The nozzle driving mechanism 6 is respectively arranged on the fixed plate 2 and the movable plate 3 and drives the nozzle 5 to move along the moving direction of the movable plate 3. Before opening the plastic, the nozzle driving mechanism 6 drives the nozzle 5 to approach the plastic bag. After the nozzle 5 sucks the plastic bag, the nozzle driving mechanism 6 drives the nozzle 5 to move back to preliminarily open the plastic bag.

[0030] It also includes a bag pressing fixing block 7, a bag pressing block 71 and a bag pressing cylinder 72. The bag pressing fixing block 7 is respectively arranged on the fixed plate 2 and the movable plate 3. The bag pressing cylinder 72 is respectively arranged on the fixed plate 2 and the movable plate 3 and drives the bag pressing block 71 to move in the direction close to and away from the bag pressing fixing block 7. The bag pressing fixing block 7, the bag pressing block 71 and the bag pressing cylinder 72 constitute a bag pressing mechanism. When the suction nozzle 5 drives the plastic bag to move to both sides, the plastic bag enters between the bag pressing fixing block 7 and the bag pressing block 71, and then the bag pressing cylinder 72 drives the bag pressing block 71 to move, thereby fixing the plastic bag. At this time, the suction nozzle 5 no longer needs to provide suction.

[0031] There are at least two pairs of suction nozzles 5 , and the bag pressing mechanism is arranged between the two pairs of suction nozzles 5 .

[0032] The suction nozzle 5 is arranged horizontally and faces the plastic bag, and the angle between the arrangement direction of the suction slope 51 and the horizontal plane is less than 60 degrees and greater than zero degrees.

[0033] A guide rod 21 is arranged between the fixed plate 2 and the movable plate 3, and also includes a sealing member 8, which is arranged on the fixed plate 2 and seals the plastic bag. The sealing member 8 seals the loaded plastic bag by heating. It also includes a receiving funnel 9, which is arranged above the fixed plate 2 and the movable plate 3, and also includes a cutting cylinder 81 and a cutting member 82. The cutting cylinder 81 drives the cutting member 82 to separate the two plastic bags.

[0034] Figure 5 and Figure 6 Description:

[0035] 1. Set in PLC and record on touch screen;

[0036] 2. One-time suction: close the nozzle, add vacuum, and suck open successfully once;

[0037] 3. Suction open twice: close the nozzle, add vacuum, and the suction open is not in place and falls off. Close the nozzle again, add vacuum, and the suction open is successful for the second time;

[0038] 4. 3~8 times of suction: close the nozzle, add vacuum, and the suction will not be in place and it will fall off. Close the nozzle again, add vacuum, and repeat 3~8 times to successfully suck it open;

[0039] 5. Unable to open the suction: Repeat 8 times without success.

[0040] Working process: when work is required, the plastic bag is placed between the fixed plate 2 and the movable plate 3, and then the nozzle driving mechanism 6 drives the nozzle 5 to approach the plastic bag. After the nozzle 5 sucks the plastic bag, the nozzle driving mechanism 6 drives the nozzle 5 to move back to preliminarily open the plastic bag. At this time, the plastic bag enters between the bag pressing fixed block 7 and the bag pressing block 71, and then the bag pressing cylinder 72 drives the bag pressing block 71 to move, thereby fixing the plastic bag. At this time, the nozzle 5 no longer needs to provide suction, and then the movable plate 3 moves away from the fixed plate 2 to open the plastic bag. Then the material can be put into the plastic bag through the receiving funnel 9, and then the movable plate 3 approaches the fixed plate 2 again to close the plastic bag, and finally it is sealed by the sealing member 8.

Claims

1. A bag suction and bag pressing combined device for a packaging machine, characterized in that: The invention comprises a suction nozzle (5) and a suction nozzle driving mechanism (6), wherein there are at least two suction nozzles (5), the suction nozzles (5) are arranged opposite to each other and the suction nozzles (5) have a suction inclined surface (51) inclined to a horizontal plane, and the suction nozzle driving mechanism (6) drives the suction nozzles (5) to move along a relative direction of opening the plastic bag.

2. The bag suction and bag pressing combined device of a packaging machine according to claim 1, characterized in that: It also comprises a fixed plate (2) and a movable plate (3), and the suction nozzles (5) are respectively arranged on the fixed plate (2) and the movable plate (3) and are arranged opposite to each other.

3. The bag suction and bag pressing combined device of a packaging machine according to claim 2, characterized in that: It also includes a driver (4), which drives the movable plate (3) to move in a direction approaching and moving away from the fixed plate (2).

4. The bag suction and bag pressing combined device of a packaging machine according to claim 2, characterized in that: The suction nozzle driving mechanism (6) is respectively arranged on the fixed plate (2) and the movable plate (3) and drives the suction nozzle (5) to move along the relative direction of opening the plastic bag.

5. The bag suction and bag pressing combined device of a packaging machine according to claim 4, characterized in that: It also includes a bag pressing fixed block (7), a bag pressing block (71) and a bag pressing cylinder (72), wherein the bag pressing fixed block (7) is respectively arranged on the fixed plate (2) and the movable plate (3), and the bag pressing cylinder (72) is respectively arranged on the fixed plate (2) and the movable plate (3) and drives the bag pressing block (71) to move in a direction approaching or away from the bag pressing fixed block (7).

6. The bag suction and bag pressing combined device of a packaging machine according to claim 5, characterized in that: There are at least two pairs of suction nozzles (5), and the bag pressing mechanism is arranged between the two pairs of suction nozzles (5).

7. The bag suction and bag pressing combined device of a packaging machine according to claim 6, characterized in that: The suction nozzle (5) is arranged horizontally and faces the plastic bag, and the angle between the arrangement direction of the suction slope (51) and the horizontal plane is less than sixty degrees and greater than zero degrees.

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