A bag bottom gluing and folding device

Abstract

The application discloses a bag bottom gluing and folding device, which comprises a single bag body conveying component, a gluing component and a bag folding component. The single bag body conveying component comprises a conveying belt and a pressing conveying assembly. The pressing conveying assembly comprises a pressing upper conveying belt and a pressing lower conveying belt. The conveying belt passes through a gluing station. The bag folding component comprises a bag blocking piece and a bag folding plate. The bag blocking piece is arranged above the discharging end of the conveying belt. The front end of the bag blocking piece is a folding part. The bag folding plate is arranged between the conveying belt and the pressing conveying assembly and can be lifted up and down relative to the conveying belt. When the bag bottom is folded, the bag body on the conveying belt is below the bag blocking piece, and the bag bottom is above the bag folding plate. The bag folding plate is lifted up to push the bag bottom to fold upward along the folding part of the bag blocking piece. The bag folding plate is lifted up to above the bag body. The folded bag body is moved forward and enters the pressing conveying assembly. The bag bottom is bonded with the bag face, so that the gluing and folding of the bag bottom are realized.

Description

Technical Field

[0001] The present invention relates to an improved invention of a bag bottom gluing and folding device, in particular to a bag bottom gluing and folding device of a bag making machine. Background Art

[0002] See attached Figure 8 The bottom of the bottom-sealed bag has a sealed edge 13 at the bottom, which affects the bag's ability to stand upright, thus affecting the sales of the packaged product. To ensure the bag can stand upright, the bottom of the bag is folded toward one side of the bag and glued to the bag surface to make the bottom flat. Currently, there is no equipment for processing the bag bottom after bottom sealing. Summary of the Invention

[0003] In view of the technical problems existing in the background technology, the technical problem solved by the present invention is to provide a bag bottom gluing and folding device so that the bag body can stand after the bottom is sealed.

[0004] In order to solve the above technical problems, the present invention adopts the following technical solution: the bag bottom gluing and folding device is characterized in that it includes a single bag conveying component, a gluing component and a bag folding component,

[0005] A single bag conveying component includes a conveyor belt and a pressing conveying assembly, wherein the pressing conveying assembly includes a pressing upper conveyor belt and a lower conveyor belt, and the conveyor belt passes through a gluing station;

[0006] Gluing components, which are arranged at the gluing station;

[0007] The bag folding component includes a bag blocking member and a bag folding plate. The bag blocking member is arranged above the discharge end of the conveyor belt. The front end of the bag blocking member is a folding portion. The bag folding plate is arranged between the conveyor belt and the pressing conveying assembly and rises and falls relative to the conveyor belt.

[0008] When the bag bottom is folded, the bag body on the conveyor belt is below the bag stopper, and the bag bottom is above the bag folding plate. The bag folding plate moves up to push the bag bottom to fold upward along the folding part of the bag stopper. The bag folding plate moves up to above the bag body. The folded bag body moves forward and enters the pressing and conveying assembly, and the bag bottom is bonded to the bag surface.

[0009] The folded part of the bag on the conveyor belt is glued at the gluing station and then enters the bag bottom folding station at the discharge end of the conveyor belt. The bag stopper blocks the top of the bag, and the bag folding plate moves up to fold the bag bottom upward along the folded part of the bag stopper. The conveyor belt continues to convey forward, and the bag moves forward relative to the bag folding plate and enters the pressing and conveying assembly. The upward folded bag bottom is restricted by the bag folding plate or the upper conveyor belt and will be folded backward until it is attached and bonded to the upper bag surface, thus realizing the gluing and folding of the bag bottom.

[0010] Preferably, the conveyor belt conveys intermittently, while the pressing and conveying assembly conveys continuously; when the bag folding plate moves up, the conveyor belt stops conveying; after the bag folding plate moves up, the conveyor belt resumes conveying. This prevents the bag from shifting during folding, improves folding stability and accuracy, and improves the quality of the formed bag.

[0011] Preferably, the two ends of the bag folding plate are mounted on two lifting rods, and the distance between the two lifting rods is greater than the width of the bag body. The bag body can pass between the two lifting rods without being affected by the lifting rods.

[0012] Preferably, the lifting rod is further provided with a bridge plate, which is positioned below the bag folding plate, with a gap therebetween for the bag to pass through. After the bag folding plate is raised, the bridge plate is positioned at the same height as the conveyor belt. The bridge plate allows the bag to pass smoothly from the conveyor belt into the pressing and conveying assembly, preventing the bag from sagging and improving the quality of the bag bottom folding.

[0013] Preferably, after the bag folding plate is moved upward, the bag folding plate serves as a material stopper for the bag bottom. The bag folding plate serves as both a folding plate and a material stopper. After the bag bottom is folded upward, as the bag body continues to move forward, the bag folding plate blocks the upwardly folded bag bottom, causing the bag bottom to gradually fold backward and enter the pressing and conveying assembly to completely adhere to and bond with the bag surface. Furthermore, after being conveyed and shaped by the pressing and conveying assembly, the bag bottom and the bag surface are firmly bonded.

[0014] Preferably, the conveyor belt is a suction conveyor belt. The suction conveyor belt with adsorption force allows the bag to be stably conveyed on the conveyor belt, especially when the bag bottom is folded, it will not avoid left and right movement.

[0015] Preferably, the bag retaining member includes a plurality of air blowing pipes, which are longitudinally arranged and evenly spaced laterally. The air blowing ports of the air blowing pipes face forward, and the plurality of air blowing ports are laterally aligned to form a folded portion. After the bag bottom is folded upward, the bag bottom is blocked by the bag folding plate when the bag is conveyed forward. The air blowing ports provide a force to move the bag forward, thereby preventing the bag from moving backward on the conveyor belt.

[0016] Preferably, the gluing component includes a plurality of gluing heads, which are evenly arranged laterally and staggered with the air blowing pipe, so as to completely avoid the gluing part from contacting the bag blocking part.

[0017] Preferably, a finished product collection platform is provided in front of the pressing and conveying assembly, and an electrostatic eliminator is provided at the output port of the pressing and conveying assembly to eliminate static electricity on the bags output by the pressing and conveying assembly, so that the bags can smoothly enter the finished product collection platform and be neatly stacked.

[0018] As preferred, the folding part of the blocking bag piece is close to the output end of the conveying belt. The bag body is forced up and down when folding, which improves the accuracy of folding and avoids the deviation of the folding line. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 The schematic diagram of the bag body in the bag bottom folding station of the present application.

[0020] Figure 2 The schematic diagram of the bag body in the bag bottom folding station of the present application.

[0021] Figure 3 The schematic diagram of the bag body in the bag bottom folding station of the present application.

[0022] Figure 4 The schematic diagram of the bag body in the bag bottom folding station of the present application.

[0023] Figure 5 The schematic diagram of the bag body in the bag bottom folding station of the present application.

[0024] Figure 6 The schematic diagram of the bag body in the bag bottom folding station of the present application.

[0025] Figure 7 The schematic diagram of the bag body in the bag bottom folding station of the present application.

[0026] Figure 8 The schematic diagram of the bag body in the bag bottom folding station of the present application. DETAILED DESCRIPTION

[0027] The relevant details and working principles of the embodiments and examples of the present application are described below in combination with the drawings. The arrow direction in the drawings is the conveying direction, which is also the front direction.

[0028] This bag bottom gluing and folding device includes a single bag conveying component, a gluing component 2 and a bag folding component. The single bag conveying component is used to convey an independent bag 1. The single bag conveying component includes a conveyor belt 3 and a pressing conveying component. The pressing conveying component includes a pressed upper conveyor belt 8 and a lower conveyor belt 9. The conveyor belt can convey multiple bags at the same time, and there is a certain distance between adjacent bags; the gluing component 2 is arranged at the gluing station, and the conveyor belt 3 passes through the gluing station. The gluing component can be applied by gluing or spraying, among which the dispensing method is preferred. The bag folding component includes a bag blocking component 4 and a bag folding plate 5. The bag blocking component is arranged above the discharge end of the conveyor belt 3. The front end of the bag blocking component 4 is a folding portion 11, which is folded along the folding portion to form a folding line. In the figure, the folding portion of the bag blocking component 4 is close to the output end of the conveyor belt 3, and the folding effect is best. When the bag bottom is folded, the conveyor belt below the bag body is supported and the bag blocking component is blocked above. The upper and lower parts are subjected to force, which improves the accuracy of folding and avoids the deviation of the folding line. The bag folding plate 5 is arranged between the conveyor belt and the pressing conveying assembly and rises and falls relative to the conveyor belt 3; when the bag bottom is folded, the bag body on the conveyor belt 3 is below the bag blocking member 4, and the bag bottom is above the bag folding plate 5, the bag folding plate moves up to push the bag bottom to fold upward along the folding portion 11 of the bag blocking member, the bag folding plate moves up to above the bag body, the conveyor belt 3 continues to convey forward, and the bag body moves forward relative to the bag folding plate 5 and enters the pressing conveying assembly. The upward folded bag bottom is restricted by the bag folding plate or the upper conveyor belt and gradually folded backward until it is attached and bonded to the upper bag surface, thereby realizing automatic gluing and folding compounding of the bag bottom.

[0029] During the conveying process, the bag bottom is easily folded, which may cause the bag body to shift and the bag bottom folding to be inaccurate. In order to improve the quality of the bag bottom folding, the conveyor belt 3 conveys intermittently, and the pressing conveying assembly conveys continuously. When the bag folding plate 5 moves up, the conveyor belt stops conveying; after the bag folding plate moves up, the conveyor belt 3 continues conveying. Such intermittent operation can avoid the bag body from shifting during folding, thereby improving the stability and accuracy of folding and making the quality of the formed bag body better. The conveyor belt 3 is a suction conveyor belt. The suction conveyor belt with adsorption force allows the bag body to be stably conveyed on the conveyor belt, especially when the bag bottom is folded, it will not avoid movement in the left and right directions, thereby improving the folding effect of the bag bottom.

[0030] The two ends of the bag folding plate 5 are mounted on two lifting rods. The lifting of the lifting rods can be driven by a pneumatic cylinder 7. The spacing between the two lifting rods is greater than the width of the bag. After the bottom of the bag is folded upward, the conveyor belt 3 allows the bag to continue to move forward, and the bag passes between the two lifting rods without being affected by the lifting rods. The lifting rods are also equipped with a bridge plate 6. The bridge plate is arranged below the bag folding plate 5, and there is a gap between the two for the bag to pass through. After the bag folding plate 5 moves upward, the bridge plate 6 is arranged at the same height as the conveyor belt 3. Due to the installation of the bag folding plate 5, there is a certain distance between the conveyor belt 3 and the pressing and conveying assembly. The bridge plate 6 connects the conveyor belt with the pressing and conveying assembly. After the bottom of the bag is folded upward, the bridge plate allows the bag to smoothly enter the pressing and conveying assembly from the conveyor belt, preventing the bag from sagging and improving the quality of the bag bottom folding. After the bag folding plate moves up, the bag folding plate serves as a material baffle at the bottom of the bag. The bag folding plate serves as both a folding plate and a material baffle. After the bag bottom is folded upward, as the bag body continues to move forward, the bag folding plate blocks the upward folded bag bottom, causing the bag bottom to gradually fold backward and enter the pressing and conveying assembly to be completely adhered to the bag surface and bonded together. After being conveyed and shaped by the pressing and conveying assembly, the bag bottom and the bag surface are firmly bonded.

[0031] The bag-blocking member 4 can be a flat plate or formed by a plurality of laterally arranged rods. In this embodiment, the bag-blocking member includes a plurality of air blowing pipes, which are arranged longitudinally and evenly arranged laterally. The air blowing ports of the air blowing pipes face forward, and the plurality of air blowing ports are laterally aligned to form a folded portion. After the bottom of the bag is folded upward, when the bag body is conveyed forward, the bottom of the bag will be blocked by the bag folding plate. The air blowing ports blow air, giving the bag body forward movement and preventing the bag body from moving backward on the conveyor belt. The gluing component can be sprayed or applied, with gluing being preferred. The gluing component 2 includes a plurality of gluing heads, which are evenly arranged laterally. The gluing heads and the air blowing pipes are laterally offset, thereby completely avoiding contact between the gluing part and the bag-blocking member.

[0032] A finished product collection platform 12 is provided in front of the pressing and conveying assembly, and an electrostatic eliminator 10 is provided at the output port of the pressing and conveying assembly to eliminate static electricity on the bags output by the pressing and conveying assembly, so that the bags can smoothly enter the finished product collection platform and be neatly stacked.

[0033] The conveying belt forwards the independent bag body with the bottom sealed to the front, and the bag bottom of the bag body is in front; when the bag body passes through each position of the glue applying device, the glue applying head applies glue on the bag bottom or the bag surface at the bonding position, the glue applying position is staggered with the blowing pipe, the bag body after the glue applying enters the bag bottom folding position, at this time the conveying belt stops conveying, the bag blocking member is blocked above the bag body, the bag folding plate moves upward to make the bag bottom fold upward along the folding part of the bag blocking member, then the conveying belt continues to forward, the bag body moves forward relative to the bag folding plate, the bridge plate supports the bag body, the bag folding plate above blocks the bag bottom folded upward, with the continuous forward movement of the bag body, the bag bottom is gradually folded backward, enters the pressing and conveying assembly, and is completely attached and bonded with the bag surface, and after the conveying and setting of the pressing and conveying assembly, the bag bottom and the bag surface are firmly bonded, the glue applying, folding and sealing of the bag bottom are realized.

Claims

1. A bag bottom gluing and folding device, characterized by: It includes a single bag conveying component, a gluing component and a bag folding component. A single bag conveying component includes a conveyor belt and a pressing conveying assembly, wherein the pressing conveying assembly includes a pressing upper conveyor belt and a lower conveyor belt, and the conveyor belt passes through a gluing station; Gluing components, which are arranged at the gluing station; The bag folding component includes a bag blocking member and a bag folding plate. The bag blocking member is arranged above the discharge end of the conveyor belt, the front end of the bag blocking member is a folding portion, and the bag folding plate is arranged between the conveyor belt and the pressing conveying assembly and rises and falls relative to the conveyor belt; the two ends of the bag folding plate are mounted on two lifting rods, and the distance between the two lifting rods is greater than the width of the bag body; The lifting rod is also provided with a bridge plate, which is arranged below the bag folding plate, with a gap between the two for the bag to pass through; After the bag folding plate moves up, the bridge plate is set at the same height as the conveyor belt, and the bag folding plate serves as a material blocking plate at the bottom of the bag; When the bag bottom is folded, the bag body on the conveyor belt is below the bag stopper, and the bag bottom is above the bag folding plate. The bag folding plate moves up to push the bag bottom to fold upward along the folding part of the bag stopper. The bag folding plate moves up to above the bag body. The folded bag body moves forward and enters the pressing and conveying assembly, and the bag bottom is bonded to the bag surface.

2. The bag bottom gluing and folding device according to claim 1, characterized in that: The conveyor belt conveys intermittently, and the pressing and conveying assembly conveys continuously; when the bag folding plate moves up, the conveyor belt stops conveying; after moving up the bag folding plate, the conveyor belt continues conveying.

3. The bag bottom gluing and folding device according to claim 1, characterized in that: The conveyor belt is a suction conveyor belt.

4. The bag bottom gluing and folding device according to claim 3, characterized in that: The bag blocking member includes a plurality of air blowing pipes, which are longitudinally arranged and laterally evenly arranged. The air blowing ports of the air blowing pipes face forward, and the plurality of air blowing ports are laterally aligned to form a folded portion.

5. The bag bottom gluing and folding device according to claim 4, characterized in that: The gluing component includes a plurality of gluing heads, which are evenly arranged laterally, and the gluing heads and the air blowing pipe are laterally staggered.

6. The bag bottom gluing and folding device according to claim 1, characterized in that: A finished product collecting platform is provided in front of the pressing and conveying assembly, and an electrostatic eliminator is provided at the output port of the pressing and conveying assembly.

7. The bag bottom gluing and folding device according to claim 1, characterized in that: The folded portion of the bag-blocking member is close to the output end of the conveyor belt.

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