Bag bottom folding device

Abstract

The utility model discloses a bag bottom folding device which comprises a single bag body conveying part and a bag folding part, the single bag body conveying part comprises a conveying belt and a press-fit conveying assembly, and the press-fit conveying assembly comprises an upper conveying belt and a lower conveying belt which are used for press fit; 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, and the bag folding plate is arranged between the conveying belt and the press-fit conveying assembly and ascends and descends up and down relative to the conveying belt. When the bag bottom is folded, the bag body on the conveying belt is located below the bag blocking piece, the bag bottom is located above the bag folding plate, the bag folding plate moves upwards to push the bag bottom to be folded upwards along the folding portion of the bag blocking piece, the bag folding plate moves upwards to the position above the bag body, the folded bag body moves forwards and enters the press-fit conveying assembly, the bag bottom is bonded with the bag surface, and gluing and folding of the bag bottom are achieved.

Description

Technical Field

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

[0002] See the appendix Figure 8 , there is a sealing edge 13 left at the bottom of the bottom-sealed bag body, which will affect the standing of the bag body, thus affecting the sales of the packaged products. In order to make the bag body stand upright, the bottom of the bottom-sealed bag is folded towards one bag surface and adhered to the bag surface to make the bag bottom flat. At present, 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 art, the technical problem to be solved by the utility model is to provide a bag bottom folding device to enable the bottom-sealed bag body to stand.

[0004] To solve the above technical problems, the utility model adopts the following technical solutions: This kind of bag bottom folding device is characterized in that it includes a single bag body conveying component and a bag folding component.

[0005] The single bag body conveying component includes a conveyor belt and a pressing and conveying assembly, and the pressing and conveying assembly includes a pressing upper conveyor belt and a lower conveyor belt.

[0006] The bag folding component includes a bag blocking member and a bag folding plate. The bag blocking member is arranged above the discharging end of the conveyor belt, and the front end of the bag blocking member is a folding part. The bag folding plate is arranged between the conveyor belt and the pressing and conveying assembly and moves up and down relative to the conveyor belt.

[0007] When the bag bottom is folded, the bag body on the conveyor belt is under the bag blocking member, 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 blocking member. The bag folding plate moves up above the bag body, and the folded bag body moves forward and enters the pressing and conveying assembly, and the bag bottom is adhered to the bag surface.

[0008] The bag body on the conveyor belt enters the bag bottom folding station at the discharging end of the conveyor belt. The bag blocking member blocks above the bag body. The bag folding plate moves up to make the bag bottom fold upward along the folding part of the bag blocking member. The conveyor belt continues to convey forward, and the bag body moves forward relative to the bag folding plate and enters the pressing and conveying assembly. The upward-folded bag bottom will be folded backward under the restriction of the bag folding plate or the upper conveyor belt until it is attached to and adhered to the upper bag surface, realizing the folding of the bag bottom.

[0009] Preferably, 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 the bag folding plate moves up, the conveyor belt continues to convey. This can avoid the displacement of the bag body during folding, improve the stability and accuracy of folding, and make the quality of the formed bag body better.

[0010] Preferably, both ends of the bag folding plate are installed 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.

[0011] Preferably, a bridging plate is also installed on the lifting rod. The bridging plate is arranged below the bag folding plate, and there is a gap for the bag body to pass between them; after the bag folding plate moves upward, the bridging plate is set at the same height as the conveyor belt. The setting of the bridging plate enables the bag body to smoothly enter the pressing and conveying assembly from the conveyor belt, avoiding the bag body from sagging and improving the quality of the bottom folding of the bag at the same time.

[0012] Preferably, after the bag folding plate moves upward, the bag folding plate serves as a baffle for the bottom of the bag. The bag folding plate serves both as a folding plate and a baffle. After the bottom of the bag is folded upward and the bag body continues to move forward, the bag folding plate blocks the upward-folded bottom of the bag, causing the bottom of the bag to gradually fold backward. When it enters the pressing and conveying assembly, it completely adheres to and bonds with the bag surface. And through the conveying and shaping of the pressing and conveying assembly, the bottom of the bag is firmly bonded to the bag surface.

[0013] Preferably, the conveyor belt passes through a gluing station, and the gluing station is provided with a gluing component;

[0014] The gluing component includes a number of dispensing nozzles, and the dispensing nozzles are arranged horizontally and evenly.

[0015] The bag body on the conveyor belt is first glued at the gluing station and then enters the bag bottom folding station for folding the bottom of the bag, realizing gluing the bottom of the bag and folding the bottom of the bag.

[0016] Preferably, the conveyor belt is a suction conveyor belt. The suction conveyor belt with adsorption force enables the bag body to be stably conveyed on the conveyor belt, especially preventing the bag body from moving in the left-right direction during the folding of the bottom of the bag.

[0017] Preferably, the bag blocking member includes a number of air blowing pipes. The air blowing pipes are arranged longitudinally and horizontally evenly. The air blowing ports of the air blowing pipes face forward, and a number of air blowing ports are horizontally aligned and form a folding part. After the bottom of the bag is folded upward and 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 to give the bag body the power to move forward and prevent the bag body from moving backward on the conveyor belt. The dispensing nozzles and the air blowing pipes are horizontally offset. This completely avoids the gluing part from contacting the bag blocking member.

[0018] Preferably, a finished product collection table 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. Eliminate the static electricity on the bag body output by the pressing and conveying assembly, enabling the bag body to smoothly enter the finished product collection table and stack neatly.

[0019] Preferably, the folding part of the bag blocking member is close to the output end of the conveyor belt. When the bag body is folded, it is stressed both up and down, improving the folding accuracy and avoiding the deviation of the folding line. Description of the Drawings

[0020] Figure 1 It is a schematic diagram of the bag body of the present invention at the glue application station.

[0021] Figure 2 It is a schematic diagram of the bag body of the present invention at the bag bottom folding station.

[0022] Figure 3 It is a schematic diagram of the upward folding of the bag bottom of the present invention.

[0023] Figure 4 It is a schematic diagram of the backward folding of the bag bottom of the present invention.

[0024] Figure 5 It is a schematic diagram of the bag body of the present invention entering the pressing and conveying assembly.

[0025] Figure 6 It is a top view of the present invention.

[0026] Figure 7 It is a schematic diagram of the bag body after the bag bottom is glued and folded.

[0027] Figure 8 It is a schematic diagram of the bag body after the bottom is sealed. Detailed Embodiments

[0028] The following describes the embodiments of the present invention, the relevant details and working principles in conjunction with the drawings. The arrow direction in the figure is the conveying direction and also the front direction.

[0029] This kind of bottom gluing and folding device for bags includes a single bag body conveying component, a gluing component 2 and a bag folding component. The single bag body conveying component is used to convey independent bag bodies 1. The single bag body conveying component includes a conveyor belt 3 and a pressing and conveying assembly. The pressing and conveying assembly includes a pressed upper conveyor belt 8 and a lower conveyor belt 9. The conveyor belt can convey multiple bag bodies at the same time, and there is a certain distance between adjacent bag bodies. The gluing component 2 is arranged at the gluing station. The conveyor belt 3 passes through the gluing station. The gluing component can adopt the method of coating glue or spraying glue, and among them, the method of dotting glue is better. The bag folding component includes a bag blocking member 4 and a bag folding plate 5. The bag blocking member is arranged above the discharge end of the conveyor belt 3. The front end of the bag blocking member 4 is a folding part 11. Folding along the folding part forms a folding line. In the figure, the folding part of the bag blocking member 4 is close to the output end of the conveyor belt 3, and the folding effect is the best. Because when the bottom of the bag is folded, the lower conveyor belt of the bag body holds it, and there is a bag blocking member blocking it above. Both the upper and lower parts are stressed, improving the accuracy of folding and avoiding the deviation of the folding line. The bag folding plate 5 is arranged between the conveyor belt and the pressing and conveying assembly and moves up and down relative to the conveyor belt 3. When the bottom of the bag is folded, the bag body on the conveyor belt 3 is under the bag blocking member 4, and the bottom of the bag is above the bag folding plate 5. The bag folding plate moves up to push the bottom of the bag to fold upward along the folding part 11 of the bag blocking member. When the bag folding plate moves up 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 and conveying assembly. The upward-folded bottom of the bag is gradually folded backward under the restriction of the bag folding plate or the upper conveyor belt until it is attached to and bonded with the upper bag surface, realizing the automatic gluing, folding and compounding of the bottom of the bag.

[0030] During the conveying process, it is easy to have the deviation of the bag body and inaccurate folding of the bottom of the bag when folding the bottom of the bag. In order to improve the quality of folding the bottom of the bag, the conveyor belt 3 conveys intermittently, and the pressing and 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 to convey. Such intermittent operation can avoid the displacement of the bag body during folding, thus 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 enables the bag body to be stably conveyed on the conveyor belt, especially when the bottom of the bag is folded, it can avoid the movement in the left and right directions and improve the folding effect of the bottom of the bag.

[0031] Both ends of the folding bag plate 5 are installed on two lifting rods. The lifting of the lifting rods can be driven by a cylinder 7. The distance between the two lifting rods is greater than the width of the bag body. After the bottom of the bag is folded upward, the conveyor belt 3 makes the bag body continue to move forward, and the bag body passes between the two lifting rods without being affected by the lifting rods. A bridging plate 6 is also installed on the lifting rods. The bridging plate is arranged below the folding bag plate 5, and there is a gap for the bag body to pass between them. After the folding bag plate 5 moves upward, the bridging plate 6 is set at the same height as the conveyor belt 3. Due to the setting of the folding bag plate 5, there is a certain distance between the conveyor belt 3 and the pressing and conveying assembly. The bridging plate 6 connects the conveyor belt and the pressing and conveying assembly. After the bottom of the bag is folded upward, the bridging plate enables the bag body to smoothly enter the pressing and conveying assembly from the conveyor belt, avoiding the bag body from sagging and improving the quality of the bottom folding of the bag. After the folding bag plate moves upward, the folding bag plate serves as a baffle for the bottom of the bag. The folding bag plate serves both as a folding plate and a baffle. After the bottom of the bag is folded upward, as the bag body continues to move forward, the folding bag plate blocks the upward-folded bottom of the bag, causing the bottom of the bag to gradually fold backward. When entering the pressing and conveying assembly, it completely adheres to and bonds with the bag surface, and through the conveying and shaping of the pressing and conveying assembly, the bottom of the bag is firmly bonded to the bag surface.

[0032] The bag blocking member 4 can be a flat plate or formed by several horizontally arranged rods. In this embodiment, the bag blocking member includes several air blowing pipes. The air blowing pipes are longitudinally arranged and horizontally evenly arranged. The air blowing ports of the air blowing pipes face forward, and several air blowing ports are horizontally aligned and form a folding part. 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 folding bag plate. The air blowing ports blow air to give the bag body the power to move forward and prevent the bag body from moving backward on the conveyor belt. The gluing component can apply glue in the way of spraying glue or coating glue, and dot gluing is preferred. The gluing component 2 includes several dot glue heads. The dot glue heads are horizontally evenly arranged, and the dot glue heads are horizontally offset from the air blowing pipes, so as to completely avoid the contact between the gluing part and the bag blocking member.

[0033] A finished product collection table 12 is provided in front of the pressing and conveying assembly. An electrostatic eliminator 10 is provided at the output port of the pressing and conveying assembly to eliminate the static electricity on the bag body output by the pressing and conveying assembly, so that the bag body can smoothly enter the finished product collection table and be stacked neatly.

[0034] The conveyor belt conveys the independent bags with the bottom sealed forward, with the bag bottom of the bag in the front; when the bag passes through each gluing station, the dispensing head dispenses glue on the bag bottom or the bag surface at the bonding part, and the dispensing position is misaligned with the air blowing pipe. After dispensing, the bag enters the bag bottom folding station. At this time, the conveyor belt stops conveying, the bag blocking part blocks above the bag, and the folding plate moves up to fold the bag bottom upward along the folding part of the bag blocking part. After that, the conveyor belt continues to convey forward, and the bag moves forward relative to the folding plate. The bridging plate supports the bag, and the upper folding plate blocks the bag bottom after upward folding. As the bag continues to move forward, the bag bottom is gradually folded backward. When it enters the pressing and conveying assembly, it completely adheres to and bonds with the bag surface. And through the conveying and shaping of the pressing and conveying assembly, the bag bottom and the bag surface are firmly bonded together, realizing the gluing and folding of the bag bottom.

Claims

1. A bag bottom folding device, characterized in that: It includes a single bag conveying 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; The bag folding component includes a bag blocking component and a bag folding plate. The bag blocking component is arranged above the discharge end of the conveyor belt. The front end of the bag blocking component 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. When the bag bottom is folded, the bag body on the conveyor belt is below the bag blocking member, 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 portion of the bag blocking member. The bag folding plate moves up to above the bag body, and 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 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 the bag folding plate moves up, the conveyor belt continues conveying.

3. The bag bottom folding device according to claim 1, characterized in that: 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.

4. The bag bottom folding device according to claim 3, characterized in that: The lifting rod is also provided with a bridge plate, which is arranged below the bag folding plate, with a gap therebetween for the bag to pass through; after the bag folding plate is moved upward, the bridge plate is arranged at the same height as the conveyor belt.

5. The bag bottom folding device according to claim 4, characterized in that: After the bag folding plate moves up, the bag folding plate becomes a material blocking plate at the bottom of the bag.

6. The bag bottom folding device according to claim 1, characterized in that: The conveyor belt passes through a gluing station, and the gluing station is provided with a gluing component; The glue applying component comprises a plurality of glue dispensing heads, and the glue dispensing heads are evenly arranged in the transverse direction.

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

8. The bag bottom folding device according to claim 6, characterized in that: The bag blocking member includes a plurality of air blowing pipes, which are arranged longitudinally and evenly arranged transversely, with the air blowing ports of the air blowing pipes facing forward, and the plurality of air blowing ports are aligned transversely to form a folded portion; the dispensing head and the air blowing pipe are arranged transversely staggered.

9. The bag bottom 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 a static eliminator is provided at the output port of the pressing and conveying assembly.

10. The bag bottom 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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