Bottom folding device of bag making equipment

Abstract

The bottom folding device of the bag making equipment comprises a rack, a conveying platform is arranged on the rack, and a bag blank is folded and conveyed on the conveying platform. The length direction of the bag blank is perpendicular to the conveying direction, one of the two bottom split faces forming the bag bottom is bent relative to the bag blank body, and the surface of one side of the bottom split face is overlapped on the upper surface of the bag blank body. In the conveying direction, a bag bottom separating component and a bag bottom folding component are sequentially arranged on the machine frame. The bag bottom separating part comprises a separating part, and the separating part can separate the end of one bottom separating face from the upper surface of the bag blank body in the height direction. The bag bottom folding component comprises a folding plate, the folding plate is inserted between the end of one bottom split face and the upper surface of the bag blank body which are separated from each other, the end of the bottom split face is guided to be folded relative to the bag blank body, and the other side surface of the bottom split face is attached to the bag blank body. The bottom folding device has the advantages of being simple in structure and efficient and convenient in bottom folding.

Description

Technical Field

[0001] The utility model relates to the technical field related to bag making, in particular to a bottom folding device of bag making equipment. Background Art

[0002] Bag making equipment is a device for producing packaging bags in the prior art. During the bag making process, the sheet material pasted into a cylindrical shape needs to be cut into individual bag blanks one by one by a cutting device, and then the bag blanks are indented and conveyed to the bottom opening device for bottom opening. The bag blanks with completed bottom opening are conveyed to the gluing device for gluing, and then the bag blanks with completed gluing are conveyed to the bottom folding device for bottom folding, thereby making a complete packaging bag.

[0003] However, most common bottom folding devices in the prior art use a large hub component in conjunction with a cam or a paddle to seal the bottom of the packaging bag. This traditional bottom closing device requires a rotating large hub component to cooperate with the paddle to seal the bottom of the packaging bag. The coordination requirements between the large hub component and the paddle are high, and it is easy for the bag bottom to not be folded, or wrinkles to appear on the bag bottom when the large hub rotates, resulting in defective products after the bottom is folded. In addition, this bottom folding device has the problems of complex structure, high manufacturing cost and high maintenance cost.

[0004] With the development of technology, the materials and bag types of packaging bags have also developed and iterated rapidly. For example, paper packaging bags are becoming more and more widely used because the materials are more environmentally friendly. This type of paper packaging bag will have some new bag types. These new bag types sometimes cannot be completed with the bottom seal on the traditional large hub parts, and the equipment and machines need to be modified, which will result in higher R&D and manufacturing costs.

[0005] Therefore, the bottom folding device of the packaging equipment in the prior art has a problem of complex structure when using a large hub component to cooperate with the paddle to fold the bottom. Utility Model Content

[0006] The purpose of the present application is to solve the problem of complex structure when the bottom folding device of the packaging equipment in the prior art uses a large hub component to cooperate with a paddle to fold the bottom.

[0007] To address the aforementioned technical issues, embodiments of the present application disclose a bottom folding device for bag-making equipment, comprising a frame with a conveying platform disposed thereon extending in a conveying direction, on which a blank is folded and conveyed in the conveying direction. The lengthwise direction of the blank is perpendicular to the conveying direction, and one of the two bottom surfaces forming the bottom of the bag is bent relative to the main body of the blank, with one side surface overlapping the upper surface of the main body, while the other is located at a side end of the main body in the lengthwise direction.

[0008] In the conveying direction, the frame is also provided with a bag bottom separating component and a bag bottom folding component in sequence.

[0009] The bag bottom separating component is located upstream of the bag bottom folding component and has a separating portion that acts on the end of one bottom part to separate the end of one bottom part from the upper surface of the bag blank body in the height direction.

[0010] The bag bottom folding component has a folding plate extending along the conveying direction, and the upstream end of the folding plate in the conveying direction is inserted between the end of a bottom part surface separated from each other and the upper surface of the bag blank body, guiding the end of the bottom part surface to fold relative to the bag blank body and making the other side surface of the bottom part surface adhere to the bag blank body.

[0011] By adopting the above-mentioned technical solution, in the bottom folding device of the bag-making equipment disclosed in the present application, the length direction of the bag blank is perpendicular to the conveying direction, and the bag blank is conveyed on the conveying platform, so the conveying speed of the bag blank can be conveniently adjusted and controlled, and a bag bottom separation component and a bag bottom folding component are arranged on the frame. The separation part of the bag bottom separation component can separate the end of a bottom surface and the upper surface of the bag blank body from each other in the height direction, so that the folding plate of the bag bottom folding component can be inserted between the separated bottom surface and the upper surface of the bag blank body, and guide the separated bottom surface to be folded relative to the bag blank body and make the other side surface of the bottom surface fit to the bag blank body to complete the bottom folding.

[0012] By arranging a simple bag bottom separation component and a bag bottom folding component on the conveying path of the bag blank, the bottom folding action can be realized, avoiding the use of large hub components, paddles, cams and other mechanisms. The structure is simpler. The bottom surface is separated only by the bag bottom separation component, and then the bottom folding is completed by folding the bag bottom folding component. It has the advantage of more efficient and convenient bottom folding.

[0013] Moreover, the bottom folding device of the bag making equipment disclosed in the present application only needs to convey the bag blank normally along the conveying platform when folding the bottom of the packaging bag, and then separate the bottom surface first through the bag bottom separation component, and then guide the folding of the bottom surface through the bag bottom folding component to complete the bottom folding and sealing actions. For various bag types, when folding the bottom, the bottom surface is basically separated and then guided by the bag bottom folding component to complete the folding. Therefore, the bottom folding device can be widely applied to various different equipment or bag types, meet the bottom sealing requirements of different packaging bags, and has a wider range of applications.

[0014] The present application also discloses a bottom folding device for bag-making equipment, wherein a folding plate includes a first extension, a guide, and a second extension arranged in sequence along the conveying direction. The first and second extensions extend along the surface of the conveying platform, and the guide is spiral-shaped, with both ends smoothly transitioning to the first and second extensions, respectively. Furthermore, the first extension, the guide, and the second extension are integrally formed into a smooth spiral plate-like structure.

[0015] With the above technical solution, the first extension portion of the folding plate extends along the platform surface of the conveying platform. After the bag bottom separation component separates the end of a bottom dividing surface from the upper surface of the bag blank body in the height direction, the bag blank will continue to be conveyed and the first extension portion will be inserted between the separated bottom dividing surface and the upper surface of the bag blank body. Then the bag blank will continue to be conveyed. At this time, the separated bottom dividing surface will be flipped along the spiral guide portion as the bag blank is conveyed, and finally folded to the other side surface of the bottom dividing surface to fit to one side of the bag blank body. The second extension portion can act to make the other side surface of the folded bottom dividing surface smoothly and completely fit to one side of the bag blank body.

[0016] The spiral-shaped folding plate with a smooth surface in the present application can be smoothly inserted between the separated bottom surface and the upper surface of the bag blank body, and as the bag blank is conveyed and folded, the other side surface of the separated bottom surface is adhered to the bag blank body to complete the bottom sealing action. The folding plate with a smooth surface can reduce the friction with the bag blank and the separated bottom surface, avoid scratching or tearing the separated bottom surface, and the folding plate is fixed on the frame, with a simple structure and stable and reliable, and can improve the folding efficiency of the bottom surface of the bag blank by increasing the conveying speed of the bag blank.

[0017] The embodiment of the present application further discloses a bottom folding device of a bag making device, wherein the bag bottom folding component further includes a driving component, wherein the folding plate is arranged on the outer side of a bottom surface so as to be flippable around the conveying direction, and the driving component can drive the folding plate to rotate around the conveying direction.

[0018] By adopting the above technical solution, a driving component is set to drive the folding plate to rotate around the conveying direction, which can fold the bottom surface relative to the bag body and make the other side surface of the bottom surface fit to the bag body to complete the bottom folding.

[0019] An embodiment of the present application also discloses a bottom folding device of a bag making equipment, wherein the bag bottom separation component includes a mounting frame and a blowing component serving as a separation part, the blowing component is mounted on the conveying platform through the mounting frame, located on one side of the end of a bottom dividing surface, and the blowing port of the blowing component faces the end of a bottom dividing surface.

[0020] An embodiment of the present application also discloses a bottom folding device of a bag making device, wherein the blowing component is installed above the conveying platform through a mounting frame, and the blowing port is tilted downward toward the gap between the end of a bottom surface and the conveying platform.

[0021] By adopting the above technical solution, a blowing component is set toward the end of the bottom dividing surface. When the bag blank is conveyed, the blowing component actually blows the gap between the end of the bottom dividing surface and the main body of the bag blank. The blown gas can separate the end of one bottom dividing surface and the upper surface of the main body of the bag blank from each other in the height direction, so as to facilitate the bottom folding component of the bag bottom to fold the bottom.

[0022] An embodiment of the present application also discloses a bottom folding device of a bag making equipment, wherein the bag bottom separation component includes a mounting frame and an air suction component serving as a separation part, the air suction component is mounted on the conveying platform through the mounting frame, located above the end of a bottom dividing surface, and the air suction port of the air suction component faces the end of a bottom dividing surface.

[0023] By adopting the above technical solution, the air suction component can also separate the end of a bottom surface from the upper surface of the bag blank body in the height direction, so as to facilitate the bottom folding component to fold the bottom.

[0024] An embodiment of the present application also discloses a bottom folding device of a bag making equipment, which also includes a bag bottom gluing component. In the conveying direction, the bag bottom gluing component can be adjusted in the up and down directions and arranged upstream of the bag bottom separation component and above the conveying platform. The gluing nozzle of the bag bottom gluing component faces the other side surface of a bottom dividing surface.

[0025] By adopting the above technical solution, a bag bottom gluing component is provided to first spray glue on the bottom surface that needs to be separated. In this way, when the end of the bottom surface is folded relative to the bag blank body and the other side surface of the bottom surface is adhered to the bag blank body, there is glue on the other side surface adhered to the bag blank body, and then the bottom surface is firmly bonded to one side of the bag blank body to complete the bottom sealing.

[0026] The present application also discloses a bottom folding device for bag-making equipment, further comprising a bottom pressing roller assembly. The bottom pressing roller assembly is located downstream of the bottom folding component in the conveying direction and is aligned with a contact area where the other side surface of one bottom face contacts the main body of the bag blank. The bottom pressing roller assembly includes at least one pair of opposing bottom pressing rollers, each pair of bottom pressing rollers defining a bottom pressing gap for the bag blank to pass through.

[0027] By adopting the above technical solution, a bottom pressing roller assembly is provided. When the end of the bottom surface coated with glue is folded relative to the bag blank body and the other side surface of the bottom surface is attached to the bag blank body, the bottom pressing roller assembly assists in firmly bonding the bottom surface and the bag blank body together.

[0028] The present application also discloses a bottom folding device for bag-making equipment, wherein a conveying platform includes a conveying plate extending in a conveying direction and mounted on a frame. Furthermore, a pair of conveyor belts extending in the conveying direction are disposed on either side of the conveying plate. The conveyor belts press the longitudinal ends of the blank against the platform surface of the conveying platform and convey the blank in the conveying direction.

[0029] By adopting the above technical solution, a conveyor belt is set to stably convey the bag blank along the conveying direction. The structure is simple and the conveying is convenient. In addition, the conveyor belt can press the bag blank to prevent the bag blank from deflection, wrinkles and other problems.

[0030] In summary, the utility model discloses a bottom folding device for bag making equipment, wherein a conveying platform extending along the conveying direction is provided on the frame, wherein the length direction of the bag blank is perpendicular to the conveying direction, and a bag bottom separation component and a bag bottom folding component are provided on the frame, and the separation portion of the bag bottom separation component can separate the end of a bottom part and the upper surface of the bag blank body from each other in the height direction, so that the folding plate of the bag bottom folding component is inserted between the separated bottom part and the upper surface of the bag blank body, and guides the separated bottom part to be folded relative to the bag blank body and makes the other side surface of the bottom part fit to the bag blank body to complete the bottom folding. The structure is simpler and the bottom folding method is more efficient and convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 A schematic structural diagram of a bag blank conveyed by a bottom folding device of a bag-making device provided in an embodiment of the present invention;

[0032] Figure 2 A schematic structural diagram of a bottom folding device of a bag-making device provided in an embodiment of the present invention;

[0033] Figure 3 This is a schematic diagram of the bag bottom separation component, bag bottom folding component and bag blank in the conveying direction of the bottom folding device of the bag making equipment provided by an embodiment of the utility model.

[0034] Description of reference numerals:

[0035] 100. Bag blank;

[0036] 110, bag blank body; 120, bottom dividing surface;

[0037] 200, rack;

[0038] 210, conveying platform; 220, pressing plate;

[0039] 300, bag bottom separation component;

[0040] 310, separation unit; 320, mounting frame;

[0041] 400, bag bottom folding component;

[0042] 410, folding board;

[0043] 411, first extension portion; 412, guide portion; 413, second extension portion;

[0044] 500, bag bottom gluing component; 600, bottom pressure roller assembly; 700, conveyor plate; 800, conveyor belt;

[0045] A. Conveying direction. DETAILED DESCRIPTION

[0046] As mentioned in the background technology, most of the bottom folding devices in the prior art use a large hub component in conjunction with a cam or a paddle to seal the bottom of the packaging bag, which requires precise coordination between the large hub component and the paddle or cam, and it is easy to produce defective products during folding. In addition, this bottom folding device also has the problems of complex structure, high manufacturing cost and high maintenance cost.

[0047] To solve this problem, the present application discloses a bottom folding device for bag making equipment, which conveys the bag blank in a horizontal direction, and arranges bag bottom separation components and bag bottom folding components at intervals in the conveying direction, separates a bottom surface by the bag bottom separation component, and guides the end of the bottom surface to be folded relative to the bag blank body by the bag bottom folding component so that the other side surface of the bottom surface is attached to the bag blank body, which has the advantages of simple structure, low manufacturing cost and better bottom folding effect.

[0048] Moreover, the bottom folding device of the bag making equipment disclosed in the present application only needs to convey the bag blank normally along the conveying platform when folding the bottom of the packaging bag, and then separate the bottom surface first through the bag bottom separation component, and then guide the folding of the bottom surface through the bag bottom folding component to complete the bottom folding and sealing actions. For various bag types, when folding the bottom, the bottom surface is basically separated and then guided by the bag bottom folding component to complete the folding. Therefore, the bottom folding device can be widely applied to various different equipment or bag types, meet the bottom sealing requirements of different packaging bags, and has a wider range of applications.

[0049] Next, the bottom folding device of the bag making equipment disclosed in this application is explained in more detail with reference to the accompanying drawings:

[0050] See first Figure 1 The bag blank 100 in this application is described. The bag blank 100 includes a bag blank body 110 and two bottom facets 120 forming the bag bottom. One of the two bottom facets 120 forming the bag bottom is bent relative to the bag blank body 110 and one side surface overlaps the upper surface of the bag blank body 110, and the other is located at one end of the bag blank body 110 in the length direction. Figure 1 In this embodiment, one of the two bottom surfaces 120 is relatively closer to the handle, and the other is relatively farther away from the handle. The bottom surface 120 farther away from the handle has been glued and fixed to the bag body 110. That is to say, the bottom surface 120 farther away from the handle has been completed with the bottom folded and sealed. Now it is necessary to Figure 1 The bottom surface 120 closer to the handle end is folded and sealed. It should be noted that, unless otherwise specified, the bottom surface 120 mentioned in the following text of this embodiment refers to the bottom surface 120 that is relatively closer to the handle and has not been folded.

[0051] This embodiment discloses a bottom folding device for bag making equipment. Figure 2 , including a frame 200, on which a conveying platform 210 extending along the conveying direction is provided. The bag blank 100 is folded and conveyed along the conveying direction on the conveying platform 210. The length direction of the bag blank 100 is perpendicular to the conveying direction, and the bag blank 100 is placed horizontally on the conveying platform 210. In the conveying direction, the frame 200 is also provided with a bag bottom separation component 300 and a bag bottom folding component 400 in sequence. The conveying direction is as follows. Figure 2 Indicated by the direction of the straight arrow A.

[0052] Among them, see Figure 2 Along the conveying direction indicated by the straight arrow A, the bag bottom separating component 300 is located upstream of the bag bottom folding component 400. The bag bottom separating component 300 includes a separating portion 310. The separating portion 310 acts on the end of one bottom surface 120 and separates the end of the bottom surface 120 from the upper surface of the bag body 110 in the height direction. Those skilled in the art may configure the separating portion 310 as a component such as a blowing component or an air suction component, which can separate the bottom surface 120 from the upper surface of the bag body 110, as needed. This embodiment does not specifically limit this.

[0053] The bag bottom folding component 400 has a folding plate 410 extending along the conveying direction. The upstream end of the folding plate 410 in the conveying direction is inserted between the end of a bottom dividing surface 120 separated from each other and the upper surface of the bag blank body 110, and guides the end of the bottom dividing surface 120 to be folded relative to the bag blank body 110 and makes the other side surface of the bottom dividing surface 120 adhere to the bag blank body 110.

[0054] See also Figure 2 or Figure 3 The folding plate 410 includes a first extension portion 411, a guide portion 412, and a second extension portion 413, which are sequentially arranged along the conveying direction. The first extension portion 411 and the second extension portion 413 extend along the surface of the conveying platform 210. The guide portion 412 is spiral-shaped, with its ends smoothly transitioning to the first extension portion 411 and the second extension portion 413, respectively. Furthermore, the first extension portion 411, the guide portion 412, and the second extension portion 413 are formed as a whole into a smooth spiral plate structure.

[0055] With this structural design, the first extension portion 411 of the folding plate 410 extends along the platform surface of the conveying platform 210. After the bag bottom separation component 300 separates the end of the bottom dividing surface 120 close to the handle side from the upper surface of the bag blank body 110 in the height direction, the bag blank 100 will continue to be conveyed and the first extension portion 411 will be inserted between the separated bottom dividing surface 120 and the upper surface of the bag blank body 110. Then the bag blank 100 will continue to be conveyed. At this time, the separated bottom dividing surface 120 will be flipped along the spiral guide portion 412 as the bag blank 100 is conveyed, and finally folded to the other side surface of the bottom dividing surface 120 to fit to one side of the bag blank body 110. The second extension portion 413 can act to make the other side surface of the folded bottom dividing surface 120 smoothly and completely fit to one side of the bag blank body 110.

[0056] Specifically, in this embodiment, a bottom surface 120 is separated by the bag bottom separation component 300, and then guided to be folded by the folding plate 410 so that the other side surface of the bottom surface 120 is attached to the bag blank body 110. Then, the bottom surface 120 and the bag blank body 110 need to be fixed together. They can be fixed by bonding, hot sealing or other fixing methods. For example, when bonding is used, glue can be applied to the bottom surface 120 upstream of the bag bottom separation component 300. When hot sealing is used, the hot sealing mechanism can be set downstream of the folding plate 410 to hot seal the folded bottom surface 120 and the bag blank body 110 together. Those skilled in the art can design and select according to actual needs, and this embodiment does not make a sole limitation to this.

[0057] With this structural design, in the bottom folding device of the bag making equipment disclosed in this application, the length direction of the bag blank 100 is perpendicular to the conveying direction and is conveyed on the conveying platform 210, which can easily adjust and control the conveying speed of the bag blank 100, and refer to Figure 2 The length direction of the bag blank 100 is perpendicular to the conveying direction, which makes it easier to separate and fold the bottom surface 120 during the conveying process.

[0058] To facilitate understanding of the arrangement of the bag bottom separation component 300 and the bag bottom folding component 400 on the conveying path and their cooperation with the bag blank 100, please refer to Figure 3 See also Figure 2A bag bottom separating component 300 and a bag bottom folding component 400 are provided on the frame 200. The separating portion 310 of the bag bottom separating component 300 can separate the end of one bottom surface 120 from the upper surface of the bag blank body 110 in the height direction, so that the folding plate 410 of the bag bottom folding component 400 can be inserted between the separated bottom surface 120 and the upper surface of the bag blank body 110, and guide the separated bottom surface 120 to be folded relative to the bag blank body 110 and make the other side surface of the bottom surface 120 adhere to the bag blank body 110 to complete the bottom folding.

[0059] By arranging a simple bag bottom separating component 300 and a bag bottom folding component 400 on the conveying path of the bag blank 100, the bottom folding action can be achieved, avoiding the use of large hub components, paddles and cams and other mechanisms, and the structure is simpler.

[0060] Moreover, the spiral-shaped folding plate 410 with a smooth surface in the present application can be smoothly inserted between the separated bottom surface 120 and the upper surface of the bag body 110, and as the bag 100 is conveyed and folded, the other side surface of the separated bottom surface 120 is adhered to the bag body 110 to complete the bottom sealing action. The folding plate 410 with a smooth surface can reduce the friction with the bag 100 and the separated bottom surface 120, avoid scratching or tearing the separated bottom surface 120, and the folding plate 410 is fixedly set on the frame 200, with a simple structure and stable and reliable, and can improve the efficiency of folding the bottom of the bag 100 by increasing the conveying speed of the bag 100.

[0061] For more details, see Figure 2 The bag bottom separation component 300 includes a mounting frame 320 and a blowing component serving as the separation portion 310. The blowing component is mounted on the conveying platform 210 via the mounting frame 320 and is located on one side of the end of one bottom surface 120. The blowing port of the blowing component faces the end of one bottom surface 120. The blowing component is mounted above the conveying platform 210 via the mounting frame 320, and the blowing port is tilted downward toward the gap between the end of one bottom surface 120 and the conveying platform 210.

[0062] It should be noted that, in this embodiment, the blowing component can be a common air knife, blowing nozzle, etc. The blowing component is installed above the conveying platform 210 through the mounting bracket 320. By adjusting the position of the blowing component on the mounting bracket 320, the height of the blowing component can be adjusted, and the angle of the blowing port of the blowing component toward the end of the bottom surface 120 can be further adjusted. Those skilled in the art can make adjustments according to actual needs, and this embodiment does not make specific limitations on this.

[0063] With this structural design, a blowing component is set toward the end of the bottom dividing surface 120. When the bag blank 100 is conveyed, the blowing component actually blows the gap between the end of the bottom dividing surface 120 and the bag blank body 110. The blown gas can separate the end of one bottom dividing surface 120 and the upper surface of the bag blank body 110 from each other in the height direction, so as to facilitate the bottom folding component 400 to fold the bottom.

[0064] This embodiment also discloses a bottom folding device for bag making equipment, see Figure 2 , and also includes a bag bottom gluing component 500. In the conveying direction, the bag bottom gluing component 500 can be adjusted in the up and down directions and is arranged upstream of the bag bottom separating component 300, and is located above the conveying platform 210. The gluing nozzle of the bag bottom gluing component 500 is facing the other side surface of a bottom dividing surface 120. It should be noted that the up and down direction in this embodiment is also the height direction.

[0065] Specifically, in this embodiment, the bag bottom gluing component 500 can be set as a gluing gun, a gluing nozzle, etc. The bag bottom gluing component 500 can be set to 1, 2, 3 or other quantities according to actual needs, and can be used to apply glue on the bottom surface 120 and meet the bonding strength after folding.

[0066] More specifically, in this embodiment, the bag bottom gluing component 500 can be installed upstream of the bag bottom separation component 300 through a bracket and located above the conveying platform 210, and the bag bottom gluing component 500 can be installed on the bracket by bolt connection, clamping or other methods, so that the position can be adjusted in the height direction as needed to adjust the height of the gluing nozzle of the bag bottom gluing component 500 toward the other side surface of a bottom dividing surface 120. Those skilled in the art can design and select according to actual needs, and this embodiment does not make specific limitations on this.

[0067] With this structural design, a bag bottom gluing component 500 is provided to first spray glue on the bottom surface 120 that needs to be separated. In this way, when the end of the bottom surface 120 is folded relative to the bag blank body 110 and the other side surface of the bottom surface 120 is attached to the bag blank body 110, the other side surface attached to the bag blank body 110 has glue, and then the bottom surface 120 is firmly bonded to one side of the bag blank body 110 to complete the bottom sealing.

[0068] The embodiment of the present application also discloses a bottom folding device for bag making equipment, see Figure 2, further comprising a bottom pressing roller assembly 600. In the conveying direction, the bottom pressing roller assembly 600 is located downstream of the bag bottom folding component 400 and is aligned with the contact area where the other side surface of one bottom face 120 contacts the bag blank body 110. The bottom pressing roller assembly 600 includes at least one pair of bottom pressing rollers (not shown) facing each other, with a bottom pressing gap defined between each pair of bottom pressing rollers for the bag blank 100 to pass through.

[0069] See further Figure 2 In this embodiment, a pressure wheel is further provided downstream of the bag bottom folding component 400. The pressure wheel is just aligned with the other side surface of the bottom dividing surface 120 and adheres to the bonding area of ​​the bag blank body 110. The bonding area is first pressed once, and then rolled by a pair of bottom pressure rollers opposite to each other, so that the connection between the folded and bonded bottom dividing surface 120 and the bonding area of ​​the bag blank body 110 is more firmly. In addition, it is further preferably set that the length of the bottom pressure roller is greater than the width of the bonding area between the bottom dividing surface 120 and the bag blank body 110 to provide better rolling pressure. In addition, the bottom pressure rollers can be set to 1 pair, 2 pairs, 3 pairs or other numbers according to actual needs, and this embodiment does not make specific limitations on this.

[0070] With this structural design, the bottom pressing roller assembly 600 is located downstream of the bag bottom folding component 400 and is aligned with the bonding area where the other side surface of one bottom surface 120 is bonded to the bag blank body 110. When the end of the bottom surface 120 coated with glue is folded relative to the bag blank body 110 and the other side surface of the bottom surface 120 is bonded to the bag blank body 110, the bottom pressing roller assembly 600 assists in firmly bonding the bottom surface 120 and the bag blank body 110 together.

[0071] See further Figure 2 The conveying platform 210 includes a conveying plate 700 extending along the conveying direction and disposed on the frame 200. Furthermore, a pair of conveyor belts 800 extending along the conveying direction are disposed on both sides of the conveying plate 700. The pair of conveyor belts 800 press both side ends of the blank 100 in the longitudinal direction against the platform surface of the conveying platform 210 and convey the blank 100 along the conveying direction.

[0072] Also, see Figure 2 On the conveying platform, a pressing plate 220 is provided near the bottom of the bag 100. The pressing plate 220 partially presses the bag 100, and the end of the pressing plate 220 is located at a relatively front end position of the folding plate 410 in the conveying direction. In this way, the pressing plate 220 can not only press the bag 100 steadily on the conveying platform 210 and limit the bag 100 to prevent the bag 100 from deflecting or wrinkling, but also will not affect the flipping and bottom sealing of the bottom dividing surface 120.

[0073] Specifically, in this embodiment, a pair of conveyor belts 800 extending along the conveying direction are respectively provided on both sides of the conveying plate 700. When the bag blank 100 is conveyed along the conveying direction, the two ends of the bag blank 100 in the length direction can also be pressed against the platform surface of the conveying platform 210. With such an arrangement, on the one hand, the bag blank 100 can be conveyed smoothly, and on the other hand, when the bag bottom separation component 300 separates the bottom surface 120 and the bag bottom folding component 400 folds the bottom surface 120, the bag blank body 110 is always flattened, and it can also avoid wrinkles or curling of the folded bottom surface 120 or the bag blank body 110, thereby reducing the scrap rate.

[0074] Another embodiment of this embodiment further discloses a bottom folding device of a bag-making device, wherein the bag bottom folding component 400 further includes a driving component, and a folding plate 410 is disposed on the outer side of a bottom surface 120 so as to be flippable in the conveying direction. Furthermore, the driving component can drive the folding plate 410 to rotate in the conveying direction.

[0075] In this arrangement, the folding plate 410 can be configured as a smooth, flat plate. A driving component can then be provided to actively fold the folding plate 410. When the folding plate 410 is inserted between the end of one of the separated bottom facets 120 and the upper surface of the blank body 110, the driving component drives the folding plate 410 to rotate in the conveying direction, folding the bottom facet 120 relative to the blank body 110 and causing the other side of the bottom facet 120 to adhere to the blank body 110, completing the bottom fold. This active folding method using a driving component can reduce the volume of the folding plate 410, resulting in a more compact structure.

[0076] It should be noted that the driving component can be set as a mechanism that can drive the folding plate 410 to rotate. For example, it can be set as a cylinder and a push rod. The push rod is set at the output end of the cylinder, and the push rod is connected to the folding plate 410. The cylinder pushes the push rod to move, and then the movement of the push rod drives the folding plate 410 to rotate. Technical personnel in this field can design and adjust according to actual needs, and this embodiment does not make a sole limitation to this.

[0077] The implementation method of this embodiment also discloses a bottom folding device of a bag making equipment, and the bag bottom separation component 300 includes a mounting frame 320 and an air suction component serving as a separation part 310. The air suction component is installed on the conveying platform 210 through the mounting frame 320 and is located above the end of a bottom dividing surface 120, and the air suction port of the air suction component faces the end of a bottom dividing surface 120.

[0078] With this structural design, the provision of an air suction component can also separate the end of one bottom face 120 from the upper surface of the bag body 110 in the height direction, facilitating bottom folding by the bag bottom folding component 400. When the air suction component is provided, this arrangement can be applied to a structure in which the bottom face 120 is folded first and then hot-sealed. Those skilled in the art can design and adjust according to actual needs, and this embodiment does not specifically limit this.

[0079] In summary, the utility model discloses a bottom folding device for bag making equipment, wherein a conveying platform 210 extending along the conveying direction is provided on the frame 200, wherein the length direction of the bag blank 100 is perpendicular to the conveying direction, and a bag bottom separation component 300 and a bag bottom folding component 400 are provided on the frame 200, and the separation portion 310 of the bag bottom separation component 300 can separate the end of a bottom dividing surface 120 and the upper surface of the bag blank body 110 from each other in the height direction, so that the folding plate 410 of the bag bottom folding component 400 is inserted between the separated bottom dividing surface 120 and the upper surface of the bag blank body 110, and guides the separated bottom dividing surface 120 to be folded relative to the bag blank body 110 and makes the other side surface of the bottom dividing surface 120 adhere to the bag blank body 110 to complete the bottom folding, the structure is simpler, and the bottom folding method is more convenient.

[0080] Finally, the working process of the bottom folding device of the bag making equipment disclosed in this application is briefly described:

[0081] See Figure 2 The bag blank 100 is folded and transported along the transport direction on the transport platform 210. The transported bag blank 100 is as follows. Figure 1 As shown, during the conveying process, the bag blank 100 will first pass through the bag bottom gluing component 500, which sprays glue on the bottom surface 120 to be separated. Then, the bag blank 100 is conveyed to the bag bottom separating component 300, and the blowing component as the separating part 310 blows air toward the gap between the end of the separated bottom surface 120 and the bag blank body 110, so that the end of the bottom surface 120 and the upper surface of the bag blank body 110 are separated from each other in the height direction and opened at a predetermined angle. The bag blank 100 is continuously conveyed, and then the first extension of the folding plate 410 is opened. The extension portion 411 will be inserted between the separated bottom surface 120 and the upper surface of the bag body 110, and the bag body 100 will continue to be conveyed. The separated bottom surface 120 will be flipped along the spiral guide portion 412 as the bag body 100 is conveyed, and finally folded to the other side of the bottom surface 120 and adhered to the side of the bag body 110. Then, the bag body 100 is conveyed to pass through the bottom pressing roller assembly 600, which rolls the folded and bonded bottom surface 120 and the bag body 110 to finally complete the bottom folding action of the bottom surface 120 of the bag body 100.

[0082] It should be noted that, in addition to the implementation methods of the present invention described in the above-mentioned specific embodiments, those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention is introduced in conjunction with the preferred embodiment, this does not mean that the features of this utility model are limited to this implementation method. On the contrary, the purpose of introducing the utility model in conjunction with the implementation method is to cover other options or modifications that may be extended based on the claims of the present utility model. In order to provide an in-depth understanding of the present utility model, the above description contains many specific details, and the present utility model can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present utility model, some specific details will be omitted in the description. It should be noted that, in the absence of conflict, the embodiments of the present utility model and the features in the embodiments can be combined with each other.

[0083] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0084] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, or are the orientations or positional relationships in which the utility model product is usually placed when in use. They are only for the convenience of describing the utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as a limitation on the utility model.

[0085] The terms “first”, “second”, etc. are only used for distinguishing descriptions and should not be understood as indicating or implying relative importance.

[0086] In the description of this embodiment, it should be noted that, unless otherwise specified or limited, the terms "disposed," "connected," and "connected" should be understood broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in this embodiment based on specific circumstances.

[0087] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above description is provided to further illustrate the present invention in conjunction with specific embodiments, and that the present invention should not be construed as being limited to these descriptions. Those skilled in the art may make various changes in form and detail, including simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. A bottom folding device for bag making equipment, characterized in that: The machine comprises a frame, on which a conveying platform extending in a conveying direction is provided, on which the bag blank is folded and conveyed in the conveying direction on the conveying platform; wherein the length direction of the bag blank is perpendicular to the conveying direction, one of the two bottom surfaces forming the bag bottom is bent relative to the bag blank body and one side surface overlaps with the upper surface of the bag blank body, and the other is located at one end of the bag blank body in the length direction; In the conveying direction, the frame is also provided with a bag bottom separation component and a bag bottom folding component in sequence; wherein, The bag bottom separating component is located upstream of the bag bottom folding component and has a separating portion that acts on the end of the one bottom dividing surface to separate the end of the one bottom dividing surface and the upper surface of the bag blank body from each other in the height direction; The bag bottom folding component has a folding plate extending along the conveying direction, and the upstream end of the folding plate in the conveying direction is inserted between the end of the one bottom dividing surface separated from each other and the upper surface of the bag blank body, guiding the end of the one bottom dividing surface to fold relative to the bag blank body and making the other side surface of the one bottom dividing surface adhere to the bag blank body.

2. The bottom folding device of the bag making equipment according to claim 1, characterized in that: in The folding plate includes a first extension portion, a guide portion, and a second extension portion sequentially arranged along the conveying direction, the first extension portion and the second extension portion extend along the platform surface of the conveying platform, the guide portion is spiral-shaped, and both ends thereof smoothly transition to the first extension portion and the second extension portion respectively; and The first extension portion, the guide portion, and the second extension portion are integrally formed into a spiral plate structure with a smooth surface.

3. The bottom folding device of the bag making equipment according to claim 1, characterized in that: The bag bottom folding component further includes a driving component. The folding plate is disposed on the outer side of the one bottom surface so as to be flipped around the conveying direction. Furthermore, the driving component can drive the folding plate to rotate around the conveying direction.

4. The bottom folding device of the bag making equipment according to claim 1, characterized in that: The bag bottom separation component includes a mounting frame and a blowing component serving as the separation part. The blowing component is mounted on the conveying platform through the mounting frame and is located on one side of the end of one bottom dividing surface, and the blowing port of the blowing component faces the end of one bottom dividing surface.

5. The bottom folding device of the bag making equipment according to claim 4, characterized in that: in, The air blowing component is installed above the conveying platform through the mounting frame, and the air blowing port is tilted downward toward the gap between the end of the one bottom surface and the conveying platform.

6. The bottom folding device of the bag making equipment according to claim 1, characterized in that: The bag bottom separation component includes a mounting frame and an air suction component serving as the separation part. The air suction component is mounted on the conveying platform through the mounting frame and is located above the end of one bottom dividing surface, and the air suction port of the air suction component faces the end of one bottom dividing surface.

7. The bottom folding device of the bag making equipment according to any one of claims 1 to 6, characterized in that: It also includes a bag bottom gluing component; in the conveying direction, the bag bottom gluing component can be adjusted in the up and down directions and arranged upstream of the bag bottom separation component and above the conveying platform, and the gluing nozzle of the bag bottom gluing component is facing the other side surface of the one bottom dividing surface.

8. The bottom folding device of the bag making equipment according to claim 7, characterized in that: It also includes a bottom pressing roller assembly; in the conveying direction, the bottom pressing roller assembly is located downstream of the bag bottom folding component and is aligned with the bonding area where the other side surface of the one bottom surface is bonded to the bag blank body; in The bottom pressing roller assembly includes at least one pair of bottom pressing rollers facing each other, and a bottom pressing gap is defined between each pair of bottom pressing rollers for the bag blank to pass through.

9. The bottom folding device of the bag making equipment according to any one of claims 1 to 6, characterized in that: The conveying platform includes a conveying plate extending along the conveying direction and arranged on the frame; and A pair of conveyor belts extending along the conveying direction are respectively provided on both sides of the conveying plate. The pair of conveyor belts press both side ends of the bag blank in the length direction onto the platform surface of the conveying platform and convey the bag blank along the conveying direction.

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