Kraft paper bag bottom folding machine

Abstract

The utility model relates to the technical field of kraft paper bag processing, and provides a kraft paper bag bottom folding machine which comprises a bottom folding machine body, a feeding frame and a discharging frame, the feeding frame and the discharging frame are connected to the two sides of the bottom folding machine body respectively, conveying belts are arranged at the bottom of the feeding frame and the bottom of the discharging frame respectively, and a correcting assembly is arranged in the feeding frame. The in-out pushing assembly is arranged in the feeding frame and the discharging frame, the shaping assembly is arranged in the discharging frame, the telescopic air cylinders are installed on the surfaces of the two outer sides of the feeding frame, the correcting frame is arranged at the output ends of the telescopic air cylinders, and the multiple pressing wheels are installed in the feeding frame. By means of the technical scheme, the problems that in the prior art, dislocation and deflection are prone to occurring in the paper bag entering mode of existing bottom folding machining equipment, the bottom folding position deviates due to positioning failure, hot-pressing shaping cannot be conducted, and follow-up collecting and packaging are not convenient are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of kraft paper bag processing, and specifically, to a bottom folding machine for kraft paper bags. Background Technique

[0002] Kraft paper bags are non-toxic, odorless, and pollution-free, meeting national environmental protection standards. They are of high strength and high environmental protection, and are one of the most popular environmentally friendly packaging materials in the world. Making kraft paper bags with kraft paper has been increasingly widely used. When shopping in places such as supermarkets, shopping malls, shoe stores, and clothing stores, kraft paper bags are generally provided to facilitate customers to carry the purchased items. Kraft paper bags are an environmentally friendly packaging bag with a wide variety of types.

[0003] During the processing and production of kraft paper bags, the formed packaging bags need to be bottom-folded and sealed. In the current bottom folding processing equipment, the paper bag entry method is prone to misalignment and skew, resulting in positioning failure and deviation of the bottom folding position. Moreover, it does not perform hot pressing and shaping, which is inconvenient for subsequent collection and packing.

[0004] Therefore, improvements are made to address the above problems. Content of the Utility Model

[0005] The utility model provides a bottom folding machine for kraft paper bags, which solves the problems in the related technology that the paper bag entry method of the current bottom folding processing equipment is prone to misalignment and skew, resulting in positioning failure and deviation of the bottom folding position, and it does not perform hot pressing and shaping, which is inconvenient for subsequent collection and packing.

[0006] The technical solution of the utility model is as follows: It includes

[0007] A bottom folding machine main body, a feeding rack, and a discharging rack. The feeding rack and the discharging rack are respectively connected to both sides of the bottom folding machine main body;

[0008] A pair of conveyor belts, which are respectively arranged at the bottoms of the feeding rack and the discharging rack;

[0009] A correction component, which is arranged inside the feeding rack;

[0010] An inlet and outlet pushing component, which is arranged inside the feeding rack and the discharging rack;

[0011] A shaping component, which is arranged inside the discharging rack;

[0012] The correction component includes a pair of telescopic cylinders, which are installed on the outer surfaces of both sides of the feeding rack. The output ends of the telescopic cylinders are provided with correction frames, and several pressing wheels are installed inside the feeding rack.

[0013] As a further technical solution, the inlet and outlet pushing component includes an outer plate, the outer plate is fixed to the outer end faces of the feeding rack and the discharging rack, a driving screw is rotatably connected between the outer plate and the folding bottom machine main body, and a round rod is fixed between the outer plate and the folding bottom machine main body.

[0014] As a further technical solution, a moving frame is slidably connected to the round rod, the moving frame is in threaded fit connection with the driving screw, a driving motor is arranged on the outer surface of the outer plate, and the output end of the driving motor is connected to the driving screw.

[0015] As a further technical solution, a vertical air cylinder is installed on the top of the moving frame, the output end of the vertical air cylinder is connected to a pushing frame, and anti-slip pushing plates are arranged at the bottoms of both ends of the pushing frame.

[0016] As a further technical solution, the shaping component includes a pair of top frames, the pair of top frames are fixed to both ends of the top of the discharging rack, a telescopic rod is connected to the bottom surface of the top frame, and a downward pressure spring is sleeved and connected to the output end of the telescopic rod, and the downward pressure spring is supported between the top frame and the upper end surface of the telescopic rod.

[0017] As a further technical solution, the lower end of the telescopic rod is connected to a rectangular shell, a plurality of heating tubes are arranged inside the rectangular shell, a pair of air inlet fans are installed on the top of the rectangular shell, a plurality of long holes are opened at the bottom of the rectangular shell, a bottom groove is opened at the bottom of the rectangular shell, and a shaping roller is rotatably connected in the bottom groove.

[0018] As a further technical solution, a support plate is arranged at the bottom of the discharging rack, and the support plate is attached to the inner top of the conveyor belt.

[0019] As a further technical solution, the pushing frame is integrally in an L-shaped structure.

[0020] As a further technical solution, the heating tubes are located at the middle position inside the rectangular shell, and the air inlet fans correspond to the positions of the heating tubes.

[0021] The working principle and beneficial effects of the present utility model are as follows:

[0022] 1. In the present utility model, a correction component is provided. Through the interaction of structures such as a telescopic air cylinder, a correction frame, and a pressing wheel, the paper bag can be corrected to the middle position of the conveyor belt. Cooperating with the pressing wheel, the paper bag moves in a centered state without skewing, having good stability.

[0023] 2. The present utility model is provided with a shaping assembly. Under the action of structures such as a telescopic rod, a pressing spring, a heating pipe, an intake fan, and a shaping roller, the paper bag after bottom folding can be heated by hot air, and the shaping roller presses down during the conveying process. After being heated, the position of the crease can be made more obvious, and the final forming effect is better, having a very good processing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] The present utility model will be further described in detail below in conjunction with the drawings and specific embodiments.

[0025] Figure 1 Structural schematic diagram of the present utility model;

[0026] Figure 2 Axonometric view of the present utility model;

[0027] Figure 3 Axonometric sectional view of the present utility model;

[0028] Figure 4 Attachment of the present utility model Figure 3 Partial enlarged view of part A in the figure;

[0029] In the figure: 1, bottom folding machine main body; 2, feeding rack; 3, discharging rack; 4, conveyor belt; 5, correction assembly; 5-1, telescopic cylinder; 5-2, correction frame; 5-3, pressing wheel; 6, inlet and outlet pushing assembly; 6-1, outer plate; 6-2, driving screw; 6-3, round rod; 6-4, moving frame; 6-5, driving motor; 6-6, vertical cylinder; 6-7, pushing frame; 6-8, anti-slip push plate; 7, shaping assembly; 7-1, top frame; 7-2, telescopic rod; 7-3, pressing spring; 7-4, rectangular outer shell; 7-5, heating pipe; 7-6, intake fan; 7-7, long hole; 7-8, bottom groove; 7-9, shaping roller; 8, support plate. SPECIFIC EMBODIMENTS

[0030] The technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts fall within the scope of protection of the present utility model.

[0031] As Figures 1 to 4 shown, this embodiment proposes a kraft paper bag bottom folding machine, including

[0032] a bottom folding machine main body 1, a feeding rack 2, and a discharging rack 3. The feeding rack 2 and the discharging rack 3 are respectively connected to both sides of the bottom folding machine main body 1;

[0033] A pair of conveyor belts 4 are respectively arranged at the bottoms of the feeding rack 2 and the discharging rack 3;

[0034] A rectifying assembly 5 is arranged inside the feeding rack 2;

[0035] An in-out pushing assembly 6 is arranged inside the feeding rack 2 and the discharging rack 3;

[0036] A shaping assembly 7 is arranged inside the discharging rack 3;

[0037] The rectifying assembly 5 includes a pair of telescopic cylinders 5-1. The telescopic cylinders 5-1 are installed on the outer two side surfaces of the feeding rack 2. A rectifying frame 5-2 is arranged at the output end of the telescopic cylinder 5-1. A plurality of pressing wheels 5-3 are installed inside the feeding rack 2.

[0038] In this embodiment, in order to achieve the effect of rectifying the position of the paper bag entering, the rectifying assembly 5 is designed. Telescopic cylinders 5-1 are installed on both sides of the feeding rack 2. The output end of the telescopic cylinder 5-1 is located inside the feeding rack 2. A rectifying frame 5-2 is arranged at the output end of the telescopic cylinder 5-1. The rectifying frame 5-2 is used to block the materials entering through the conveyor belt 4, and the paper bag is positioned at the center position through the structure of the rectifying frame 5-2. A plurality of pressing wheels 5-3 are rotatably connected inside the feeding rack 2 to cooperate with the conveyor belt 4 to convey the paper bag.

[0039] Furthermore, the in-out pushing assembly 6 includes an outer plate 6-1. The outer plate 6-1 is fixed to the outer end surfaces of the feeding rack 2 and the discharging rack 3. A driving screw 6-2 is rotatably connected between the outer plate 6-1 and the main body 1 of the bottom folding machine. A round rod 6-3 is fixed between the outer plate 6-1 and the main body 1 of the bottom folding machine. A moving frame 6-4 is slidably connected to the round rod 6-3. The moving frame 6-4 is in threaded cooperation with the driving screw 6-2. A driving motor 6-5 is arranged on the outer surface of the outer plate 6-1. The output end of the driving motor 6-5 is connected to the driving screw 6-2. A vertical cylinder 6-6 is installed at the top of the moving frame 6-4. The output end of the vertical cylinder 6-6 is connected to a pushing frame 6-7. Anti-slip push plates 6-8 are arranged at the bottoms of both ends of the pushing frame 6-7.

[0040] In this embodiment, in order to achieve the effect of the paper bag entering and exiting the bottom folding machine main body 1, an inlet and outlet pushing component 6 is designed. An outer plate 6-1 is arranged on the outer sides of the feeding rack 2 and the discharging rack 3. A driving screw rod 6-2 and a round rod 6-3 are arranged between the outer plate 6-1 and the side surface of the bottom folding machine main body 1. A driving motor 6-5 is installed on one side of the outer plate 6-1 to control the rotation of the driving screw rod 6-2. A moving frame 6-4 is connected to the driving screw rod 6-2 and the round rod 6-3. One end of the moving frame 6-4 is located at the tops of the feeding rack 2 and the discharging rack 3. A vertical cylinder 6-6 is installed on the top of the moving frame 6-4. The output end of the vertical cylinder 6-6 faces downward and is connected to a pushing frame 6-7. Two anti-slip push plates 6-8 are arranged at the bottom of the pushing frame 6-7. The pushing frame 6-7 can be controlled to descend by the vertical cylinder 6-6, so that the anti-slip push plates 6-8 press on the surface of the packaging bag. Then, the pushing frame 6-7 is driven by the driving screw rod 6-2 to move, and the paper bag is pushed into the bottom folding machine main body 1. The way in the discharging rack 3 is opposite, that is, the paper bag in the bottom folding machine main body 1 is taken outwards to achieve the effect of entry.

[0041] Further, the shaping component 7 includes a pair of top frames 7-1 which are fixed at both ends of the top of the discharging rack 3. A telescopic rod 7-2 is connected to the bottom surface of the top frame 7-1. The output end of the telescopic rod 7-2 is sleeved and connected with a downward pressure spring 7-3. The downward pressure spring 7-3 is supported between the top frame 7-1 and the upper end surface of the telescopic rod 7-2. The lower end of the telescopic rod 7-2 is connected with a rectangular shell 7-4. A plurality of heating tubes 7-5 are arranged inside the rectangular shell 7-4. A pair of air inlet fans 7-6 are installed on the top of the rectangular shell 7-4. A plurality of long holes 7-7 are opened at the bottom of the rectangular shell 7-4. A bottom groove 7-8 is opened at the bottom of the rectangular shell 7-4, and a shaping roller 7-9 is rotatably connected inside the bottom groove 7-8.

[0042] In this embodiment, in order to achieve the effect of pressing and shaping the bottom-folded paper bag, a shaping component 7 is designed. Two top frames 7-1 are arranged on both sides of the top of the discharging rack 3. The bottom of the top frame 7-1 is connected with a telescopic rod 7-2 and is sleeved with a downward pressure spring 7-3. The lower end of the telescopic rod 7-2 is connected with a rectangular shell 7-4. With the elastic force of the downward pressure spring 7-3 cooperating with the telescopic rod 7-2, the rectangular shell 7-4 has a certain downward pressure. A heating tube 7-5 is installed inside the rectangular shell 7-4, and an air inlet fan 7-6 is installed on the top. External air can be blown into the rectangular shell 7-4. The entering air is heated by the heating tube 7-5. A plurality of long holes 7-7 are opened at the bottom of the rectangular shell 7-4 for discharging air and covering the hot air on the paper bag. A bottom groove 7-8 is opened at the bottom of the rectangular shell 7-4 and a shaping roller 7-9 is rotatably connected inside, which can perform roller pressing on the paper bag in the heated state to make the crease better.

[0043] Further, a support plate 8 is arranged at the bottom of the discharging rack 3, and the support plate 8 is attached to the inner top of the conveyor belt 4.

[0044] In this embodiment, by installing a support plate 8 between the feeding rack 2 and the discharging rack 3, the support plate 8 is attached to the bottom of the conveyor belt 4 to play a role in supporting the bottom, so that the conveyor belt 4 will not be bent or deformed.

[0045] Furthermore, the overall shape of the pushing rack 6-7 is an L-shaped structure.

[0046] In this embodiment, due to the L-shaped structure, the bottom of the pushing rack 6-7 extends outward and can penetrate into the interior of the bottom folding machine main body 1.

[0047] Furthermore, the heating tube 7-5 is located at the middle position inside the rectangular housing 7-4, and the intake fan 7-6 corresponds to the position of the heating tube 7-5.

[0048] In this embodiment, by installing the heating tube 7-5 at the air inlet, the air blown in by the intake fan 7-6 can be heated immediately, so that the gas has enough heat to heat the paper bag.

[0049] When the bottom folding of the kraft paper bag is required, place the paper bag on the conveyor belt 4, start the conveyor belt 4 to move the paper bag into the correction rack 5-2. After the position is corrected, start the telescopic cylinder 5-1 to move the correction rack 5-2 away and continue to convey forward. After moving to the bottom of the pushing rack 6-7, start the vertical cylinder 6-6 to move the pushing rack 6-7 downward, press the anti-slip push plate 6-8 on the surface of the paper bag. Then start the drive motor 6-5 to control the rotation of the drive screw 6-2, so that the moving frame 6-4 moves linearly to push the paper bag into the bottom folding machine main body 1. After the bottom folding is completed, the pushing rack 6-7 on one side of the discharging rack 3 takes the paper bag outwards, the conveyor belt 4 conveys the paper bag outwards, the fan blows air into the rectangular housing 7-4, the entering air is heated by the heating tube 7-5 and blows out through the long holes 7-7 at the bottom, covering the surface of the paper bag, and is pressed and shaped by the shaping roller 7-9 under the elastic force of the pressing spring 7-3 during the movement, and finally collected.

[0050] The above are only the preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A bottom folding machine for kraft paper bags, characterized in that, including a bottom folding machine main body (1), a feeding rack (2) and a discharging rack (3), wherein the feeding rack (2) and the discharging rack (3) are respectively connected to two sides of the bottom folding machine main body (1); a pair of conveyor belts (4), which are respectively arranged at the bottoms of the feeding rack (2) and the discharging rack (3); a rectifying component (5), which is arranged inside the feeding rack (2); an inlet and outlet pushing component (6), which is arranged inside the feeding rack (2) and the discharging rack (3); a shaping component (7), which is arranged inside the discharging rack (3); the rectifying component (5) includes a pair of telescopic cylinders (5-1), the telescopic cylinders (5-1) are installed on the outer surfaces of two sides of the feeding rack (2), a rectifying frame (5-2) is arranged at the output end of the telescopic cylinders (5-1), and a plurality of pressing wheels (5-3) are installed inside the feeding rack (2).

2. The bottom folding machine for kraft paper bags according to claim 1, wherein the inlet and outlet pushing component (6) includes an outer plate (6-1), the outer plate (6-1) is fixed to the outer end faces of the feeding rack (2) and the discharging rack (3), a driving screw rod (6-2) is rotatably connected between the outer plate (6-1) and the main body of the bottom folding machine main body (1), and a round rod (6-3) is fixed between the outer plate (6-1) and the bottom folding machine main body (1).

3. The bottom folding machine for kraft paper bags according to claim 2, wherein, a moving frame (6-4) is slidably connected to the round rod (6-3), the moving frame (6-4) is in threaded fit connection with the driving screw rod (6-2), a driving motor (6-5) is arranged on the outer surface of the outer plate (6-1), and the output end of the driving motor (6-5) is connected to the driving screw rod (6-2).

4. The bottom folding machine for kraft paper bags according to claim 3, characterized in that, a vertical cylinder (6-6) is installed at the top of the moving frame (6-4), a pushing frame (6-7) is connected to the output end of the vertical cylinder (6-6), and anti-slip push plates (6-8) are arranged at the bottoms of both ends of the pushing frame (6-7).

5. A bottom folding machine for kraft paper bags according to claim 1, characterized in that, the shaping component (7) includes a pair of top frames (7-1), the pair of top frames (7-1) are fixed to both ends of the top of the discharging rack (3), a telescopic rod (7-2) is connected to the bottom surface of the top frame (7-1), a compression spring (7-3) is sleeved and connected to the output end of the telescopic rod (7-2), and the compression spring (7-3) is supported between the top frame (7-1) and the upper end surface of the telescopic rod (7-2).

6. The bottom folding machine for kraft paper bags according to claim 5, characterized in that, the lower end of the telescopic rod (7-2) is connected to a rectangular shell (7-4), a plurality of heating tubes (7-5) are arranged inside the rectangular shell (7-4), a pair of air inlet fans (7-6) are installed at the top of the rectangular shell (7-4), a plurality of long holes (7-7) are formed in the bottom of the rectangular shell (7-4), a bottom groove (7-8) is formed in the bottom of the rectangular shell (7-4), and a shaping roller (7-9) is rotatably connected in the bottom groove (7-8).

7. A bottom folding machine for kraft paper bags according to claim 1, characterized in that, a support plate (8) is arranged at the bottom of the discharging rack (3), and the support plate (8) is attached to the inner top of the conveyor belt (4).

8. A bottom-folding machine for kraft paper bags according to claim 4, characterized in that, the pushing frame (6-7) is integrally in an L-shaped structure.

9. The bottom folding machine for kraft paper bags according to claim 6, characterized in that, The heating pipe (7-5) is located at the middle position inside the rectangular housing (7-4), and the intake fan (7-6) corresponds to the position of the heating pipe (7-5).

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