Valve pocket automatic forming apparatus

Abstract

The application provides a valve port bag automatic forming device and relates to the technical field of valve port bags. The device comprises a conveying line, which is sequentially provided with a standing opening mechanism, a fork bottom mechanism, a valve port patch mechanism, a glue applying mechanism, a blowing and quick drying mechanism and a folding and heating mechanism along a conveying direction. The standing opening mechanism is used for standing and opening two ends of the valve port bag. The fork bottom mechanism is used for pressing and forming the opened bag port of the valve port bag. The valve port patch mechanism is used for pasting a valve port patch on a valve port corner of the valve port bag. The glue applying mechanism is used for applying glue points on the remaining three corners of the valve port bag. The blowing and quick drying mechanism is used for quickly drying the glue. The folding and heating mechanism is used for folding the bag bottom of the valve port bag and heating the glue on the three corners of the valve port bag. The application can realize automatic forming of the valve port bag, improve the sealing performance of the valve port bag and avoid the phenomenon of ash and water leakage of the valve port bag.

Description

Technical Field

[0001] This invention relates to the field of valve bag technology, and more specifically, to an automated valve bag forming device. Background Technology

[0002] Valve bags are packaging bags mainly used for packaging powdery or granular solid materials and flexible items such as edible powders, chemical powders, fertilizers, synthetic materials, explosives, grains, salt, and minerals. Valve bags are fed through a valve at the top or bottom and can be filled using specialized equipment. After filling, they are packed into cubic shapes, resulting in neat, aesthetically pleasing, and environmentally friendly bags.

[0003] However, existing valve bag forming equipment generally uses a straight-line application method for gluing, which cannot completely coat each folded corner, resulting in poor sealing. This leads to leakage of ash and water at the three corners of the formed valve bag (excluding the corner of the valve opening) during filling and transportation. Summary of the Invention

[0004] The purpose of this invention is to provide an automated valve bag forming device that can automatically form and seal valve bags, providing good sealing performance, solving the problem of bag leakage of dust and water, and greatly improving environmental protection.

[0005] The embodiments of the present invention are implemented as follows:

[0006] This application provides an automated valve bag forming device, including a conveyor line, wherein the conveyor line is provided with the following components sequentially along the conveying direction:

[0007] An upright opening mechanism is used to upright and open both ends of the valve bag;

[0008] A fork-bottom mechanism is used to press and shape the openings at both ends of the valve bag.

[0009] A valve port patching mechanism is used to attach a valve port patch to the valve port corner of the valve pocket;

[0010] The gluing mechanism includes a dispensing and applying nozzle, which is installed above the conveyor line and corresponds to both ends of the valve bag. The gluing mechanism is used to apply glue to the other three corners of the valve bag.

[0011] The quick-drying mechanism includes multiple air pipes, which are installed above the conveyor line and correspond to the glue application positions at both ends of the valve bag, with the length of the air pipes along the conveyor line. Multiple air holes are provided at intervals on the side of the air pipes facing the conveyor line. The quick-drying mechanism is used to quickly dry the glue.

[0012] A folding heating mechanism is used to fold the bottom of both ends of the valve bag and heat the glue at the three corners of the valve bag.

[0013] In some embodiments of the present invention, the dispensing and coating nozzles are provided in multiple groups, and the multiple dispensing and coating nozzles are evenly divided into two groups, with the two groups of dispensing and coating nozzles corresponding to the two ends of the valve pocket respectively.

[0014] In some embodiments of the present invention, a crawling mechanism is also provided, the crawling mechanism including a first circulating conveying component, the first circulating conveying component being provided with rubber feet, the rubber feet being able to contact the top surface of the valve bag, the crawling mechanism being used to assist the valve bag in entering the conveyor line.

[0015] In some embodiments of the present invention, the stand-up opening mechanism includes a stand-up assembly and a suction cup, the suction cup being disposed at the rear end of the stand-up assembly, the stand-up assembly being used to stand up both ends of the valve pocket, and the suction cup being used to open the stood-up valve pocket.

[0016] In some embodiments of the present invention, the fork bottom mechanism is provided in two sets, the two sets of the fork bottom mechanism corresponding to both ends of the valve pocket, the fork bottom mechanism includes two sets of second circulation conveying components; the two sets of second circulation conveying components are arranged side by side and respectively correspond to one end of the valve pocket; each set of conveying components is provided with a fork bottom foot, the fork bottom foot is circulatedly conveyed by the second circulation conveying component; a triangular plate is provided at one end of the fork bottom foot.

[0017] In some embodiments of the present invention, the valve port patching mechanism includes a valve port patch unwinding and rewinding assembly and a valve port hot air gun. The valve port patch unwinding and rewinding assembly is used to unwind and apply the valve port patch to the conveyed valve bag, and the nozzle of the valve port hot air gun faces the valve port patch.

[0018] In some embodiments of the present invention, the folding heating mechanism is provided in two sets, and the two sets of folding heating mechanisms are respectively corresponding to the two ends of the valve bag. The folding heating mechanism includes a standing folding assembly and a heating plate arranged sequentially along the conveyor line direction. The heating plate is located at the end of the standing folding assembly away from the blower drying mechanism, and the heating plate corresponds to the glue position of the valve bag.

[0019] In some embodiments of the present invention, the standing-up folding assembly includes two opposing pressure plates, two standing-up baffles, and two limiting strips. The two standing-up baffles are disposed on the pressure plates and the starting ends of the standing-up baffles are outwardly flared. The two limiting strips are disposed on the pressure plates and the limiting strips are inwardly flared along the conveying direction. The heating plate is connected to the end of the pressure plates.

[0020] In some embodiments of the present invention, the conveyor line includes an equipment frame, a steel belt and a plurality of steel belt pulleys, the steel belt is sleeved on the steel belt pulleys, and the top of the equipment frame is provided with a magnet that attracts the steel belt; the crawling mechanism is located at the front end of the conveyor line.

[0021] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0022] This invention provides an automated valve bag forming device. The device transports valve bags via a conveyor line. Along the conveyor line, a lifting and opening mechanism lifts and opens both ends of the valve bag. A fork-bottom mechanism opens the bag opening, forming the valve bag. A valve opening patch mechanism attaches a valve opening patch to the valve opening, preventing subsequent glue application and sealing. A glue application mechanism applies glue to the three corners (excluding the valve opening). A fast-drying air mechanism accelerates glue drying to prevent it from sticking to the folding mechanism and affecting bag movement. A folding and heating mechanism folds the bottom of the bag on both sides. A heating plate at the rear half of the folding mechanism slightly melts the glue, ensuring it completely seals the three corners, completing the valve bag forming and achieving efficient sealing. This invention enables automated valve bag forming and improves the sealing performance, preventing dust and water leakage. Attached Figure Description

[0023] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a schematic diagram of the overall structure of the automated valve bag forming equipment according to an embodiment of the present invention;

[0025] Figure 2 This is a schematic diagram of the climbing mechanism according to an embodiment of the present invention;

[0026] Figure 3 This is a schematic diagram of the structure of the opening mechanism according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of the fork bottom mechanism according to an embodiment of the present invention;

[0028] Figure 5 This is a schematic diagram of the adhesive application mechanism according to an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of the quick-drying mechanism according to an embodiment of the present invention;

[0030] Figure 7This is a schematic diagram of the folding heating mechanism according to an embodiment of the present invention.

[0031] Icons: 100-Crawling mechanism, 110-First cycle conveyor assembly, 120-Rubber foot, 200-Stand-up opening mechanism, 210-Stand-up assembly, 220-Suction cup, 300-Fork bottom mechanism, 310-Second cycle conveyor assembly, 320-Fork bottom foot, 321-Triangle plate, 400-Valve port patching mechanism, 410-Valve port patch winding and unwinding assembly, 420-Valve port hot air gun, 430-Valve port plate, 500-Gluing mechanism, 510-Dispensing glue spray head, 600-Blowing quick-drying mechanism, 610-Blowing pipe, 700-Folding heating mechanism, 710-Heating plate, 720-Pressure plate, 730-Stand-up baffle, 740-Limiting strip, 800-Valve bag, 910-Equipment rack, 920-Steel belt, 930-Steel belt pulley. Detailed Implementation

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations.

[0033] Therefore, the following detailed description of the embodiments of the invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the invention without inventive effort are within the scope of protection of the invention.

[0034] Example

[0035] Please refer to Figures 1-7 The diagram shows a schematic representation of an automated valve bag forming device according to an embodiment of the present invention. This embodiment provides an automated valve bag forming device, including a conveyor line, wherein the conveyor line is provided with the following components sequentially along the conveying direction:

[0036] The upright opening mechanism 200 is used to upright and open both ends of the valve bag 800;

[0037] The fork bottom mechanism 300 is used to press and shape the bag openings at both ends of the valve bag 800.

[0038] Valve port patching mechanism 400 is used to attach valve port patch 430 to the valve port corner of valve pocket 800;

[0039] The gluing mechanism 500 includes a dispensing and applying nozzle 510, which is installed above the conveyor line and corresponds to both ends of the valve bag 800. The gluing mechanism 500 is used to apply glue to the other three corners of the valve bag 800.

[0040] The quick-drying mechanism 600 includes multiple air pipes 610, which are installed above the conveyor line and correspond to the glue application positions at both ends of the valve bag 800. The length of the air pipes 610 is along the conveyor line. Multiple air holes are provided at intervals on the side of the air pipes 610 facing the conveyor line. The quick-drying mechanism 600 is used to quickly dry the glue.

[0041] The folding heating mechanism 700 is used to fold the bottom of both ends of the valve bag 800 and heat the glue at the three corners of the valve bag 800.

[0042] The following will further describe an automated valve bag forming device according to this exemplary embodiment.

[0043] In some embodiments of this application, the conveyor line includes an equipment frame 910, a steel belt 920, and a plurality of steel belt pulleys 930. The steel belt 920 is fitted onto the steel belt pulleys 930, and the steel belt 920 is driven to move by the rotation of the steel belt pulleys 930. The top of the equipment frame 910 is provided with a magnet that attracts the steel belt 920. Through the movement of the steel belt 920 and the attraction of the magnet, the valve bag 800 can be driven to move forward along the conveyor line.

[0044] In some embodiments of this application, a crawling mechanism 100 is provided at the front end of the conveyor line. The crawling mechanism 100 includes a first circulating conveying component 110, which is provided with rubber feet 120. The rubber feet 120 can contact the top surface of the valve bag 800. The crawling mechanism 100 is used to assist the valve bag 800 in entering the conveyor line. The valve bag 800 is generally unwound by an unwinding mechanism, and then micro-perforation is performed on the bag by a micro-perforation mechanism to facilitate filling. Afterwards, a cutting mechanism cuts the bag to a set length or according to a color mark. Only after completing the above processes does the valve bag 800 enter the conveyor line for forming and sealing with the help of the crawling mechanism 100.

[0045] In some embodiments of this application, the above-mentioned stand-up opening mechanism 200 includes a stand-up component 210 and a suction cup 220. The suction cup 220 is located at the rear end of the stand-up component 210. The stand-up component 210 is used to stand up both ends of the valve bag 800, and the suction cup 220 is used to open the two ends of the stand-up valve bag 800. Two sets of erection components 210 are respectively set at designated positions at both ends of the valve bag 800. The erection component 210 includes a fixed bracket and a baffle. The baffle is set on the fixed bracket and its starting end expands outward, so that the end of the valve bag 800 entering the erection component 210 is slowly erected under the obstruction of the baffle. After being erected, the valve bag 800 is opened by a suction cup 220 set at the rear end of the erection component 210. The suction cup 220 includes multiple suction nozzles arranged opposite each other. The multiple suction nozzles are connected to a vacuum generator and open the outer wall of the erected valve bag 800 by vacuum adsorption. The suction cup 220 can be connected to the expansion mechanism of the prior art. With the opening and contraction action of the expansion mechanism, it can assist in opening multiple valve bags 800 that are conveyed in sequence.

[0046] In some embodiments of this application, the fork bottom mechanism 300 is provided in two sets, with each set corresponding to one end of the valve bag 800. Each fork bottom mechanism 300 includes two sets of second circulating conveying components 310. The two sets of second circulating conveying components 310 are arranged side-by-side and correspond to one end of the bag opening of the valve bag 800. Each conveying component is provided with a fork bottom foot 320, which is circulated and conveyed by the second circulating conveying component 310. One end of the fork bottom foot 320 is provided with a triangular plate 321. Through the circulating conveying of the second circulating conveying component 310, the fork bottom foot 320 is driven to rotate circumferentially. When the valve bag 800 is conveyed to the bottom of the mechanism, the triangular plate 321 at the bottom of the fork bottom foot 320 inserts into the bag opening, causing the bag opening to open and form. Multiple fork feet 320 can be provided. In this embodiment, two fork feet 320 are preferably provided. The distance between the two fork feet 320 is set according to the conveying distance of several valve pockets 800. One fork foot 320 corresponds to one valve pocket 800 to open and form it, so as to improve the efficiency of the fork bottom.

[0047] In some embodiments of this application, the valve port patching mechanism 400 includes a valve port patch unwinding and rewinding assembly 410 and a valve port hot air gun 420. The valve port patch unwinding and rewinding assembly 410 is used to unwind and attach the valve port patch 430 to the conveyed valve bag 800. The nozzle of the valve port hot air gun 420 faces the valve port patch 430. The valve bag 800 has four corners, one of which is the valve port corner for material feeding and discharging, and the other three corners need to be sealed. To prevent the valve port corner from being sealed due to subsequent adhesive application, the valve port patch 430 is attached to protect it. The valve port patch unwinding and rewinding assembly 410 unwinds and rewinds the valve port patch 430. During the unwinding process, the valve port patch 430 is attached to the valve bag 800 and fixed by blowing hot air from the hot air gun to prevent subsequent displacement. The valve patch take-up and unwrap assembly 410 can be a take-up and unwrap mechanism in the existing technology. The roller near the conveyor line is a valve suction roller with suction force. The valve suction roller can attract the valve patch 430 so that it can be ironed onto the bag.

[0048] In some embodiments of this application, the above-mentioned gluing mechanism 500 includes a dispensing and applying nozzle 510, which is installed above the conveyor line and corresponds to both ends of the valve bag 800. The gluing mechanism 500 is used to apply glue to the other three corners of the valve bag 800. There are six glue dispensing spray heads 510, arranged in groups of three. Two groups of glue dispensing spray heads 510 correspond to the two ends of the valve bag 800. Each group of glue dispensing spray heads 510 is arranged in a triangle. The six glue dispensing spray heads 510 apply glue to the three corners other than the valve opening, with three glue application points at each corner. Three glue dispensing spray heads 510 are located above the three glue application points. One of them is located above the film-coating line and is slightly tilted to facilitate spraying to the correct position. Applying glue to the film-coating line facilitates the final sealing with the bottom strip. The other two are located above the two sides of the film-coating line. By applying glue to the three sealing corners at multiple points, the sealing performance of the valve bag 800 can be greatly improved, preventing leakage of dust and water during filling and transportation.

[0049] In some embodiments of this application, the aforementioned quick-drying air-blowing mechanism 600 includes a plurality of air-blowing pipes 610. The air-blowing pipes 610 are installed above the conveyor line and correspond to the glue application positions at both ends of the valve bag 800. The length direction of the air-blowing pipes 610 is along the conveyor line direction. The plurality of air-blowing pipes 610 are interconnected, and one of the air-blowing pipes 610 is connected to a fan. The fan delivers air to the air-blowing pipe 610. The side of the air-blowing pipe 610 facing the conveyor line is provided with a plurality of air holes at intervals. The air holes blow air to the glue application positions of the valve bag 800 to accelerate the quick drying of the glue and prevent it from sticking to the folding heating mechanism 700 and affecting the movement of the bag.

[0050] In some embodiments of this application, the aforementioned folding heating mechanism 700 is provided in two sets, each corresponding to one end of the valve bag 800. Each folding heating mechanism 700 includes a standing folding assembly and a heating plate 710 arranged sequentially along the conveyor line. The heating plate 710 is located at the end of the standing folding assembly away from the blower-drying mechanism 600, and corresponds to the glue application position on the valve bag 800. The standing folding assembly folds the bottom of the bag upright on both sides, achieving a corner seal on the valve bag 800. The heating plate 710 slightly melts the glue, completely sealing the three corners. The heating plate 710 is an electric heating plate 710, connected to a temperature control device to control its heating temperature and prevent damage to the valve bag 800.

[0051] As an example, the aforementioned upright folding assembly includes two opposing pressure plates 720, two upright baffles 730, and two limiting strips 740. The two upright baffles 730 are mounted on the pressure plates 720, with their initial ends flaring outwards. The upright baffles 730 slowly lift the bottoms of the conveyed valve bag 800 on both sides. The two limiting strips 740 are mounted on the pressure plates 720, with their limiting strips 740 concave in the conveying direction. The two limiting strips 740 are positioned on the pressure plates 720, slightly higher than their height, and concave in the conveying direction, slowly folding the upright valve bag 800 downwards to achieve a seal. A heating plate 710 is connected to the end of the pressure plates 720; after folding, it heats and melts the adhesive to improve the sealing performance. The bottom strip unwinding and covering mechanism is provided at the end of the conveyor line. It has the same structure and working mechanism as the valve port patching mechanism 400. It is used to attach the bottom strip to both sides of the valve bag 800 to complete the sealing and forming of the valve bag 800.

[0052] Working principle: The magnet below the steel belt 920 actively rotates the steel belt 920 to transport the bag. The crawling mechanism 100 grabs the cut bag and puts it into the conveyor line. After passing through the upright opening mechanism 200, the bottom of the bag on both sides is opened by the suction cup 220. After passing through the bottom fork mechanism 300, the bottom of the bag on both sides is shaped by the triangular plate 321. The valve port hot air gun 420 uses a high temperature of 600℃ to heat the valve port piece 430 onto one side of the bottom of the bag. After passing through the gluing mechanism 500, the spray gun sprays glue onto the three corners other than the valve port. After passing through the blowing and drying mechanism 600, the glue is quickly dried. The upright folding mechanism folds the bag into shape. The bottom strip hot air gun uses a high temperature of 600℃ to heat the bottom strips on both sides of the bottom of the bag. After the bag is formed, it is discharged through the bag discharge mechanism.

[0053] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. An automated valve bag forming device, comprising a conveyor line, characterized in that, The conveyor line is provided sequentially along the conveying direction as follows: An upright opening mechanism is used to upright and open both ends of the valve bag; A fork-bottom mechanism is used to press and shape the openings at both ends of the valve bag. A valve port patching mechanism is used to attach a valve port patch to the valve port corner of the valve pocket; The gluing mechanism includes a dispensing and applying nozzle, which is installed above the conveyor line and corresponds to both ends of the valve bag. The gluing mechanism is used to apply glue to the other three corners of the valve bag. There are six dispensing and applying nozzles, arranged in groups of three. Two groups of dispensing and applying nozzles correspond to the two ends of the valve bag. Each group of dispensing and applying nozzles is arranged in a triangle. The six dispensing and applying nozzles apply glue to the three corners other than the valve opening, with three gluing positions at each corner. Three dispensing and applying nozzles are located above the three gluing positions. One of them is located above the laminating line and is slightly tilted to facilitate spraying to the correct position. Applying glue above the laminating line facilitates the final bottom strip covering and sealing. The other two are located above the laminating line on both sides. The quick-drying mechanism includes multiple air pipes, which are installed above the conveyor line and correspond to the glue application positions at both ends of the valve bag, with the length of the air pipes along the conveyor line. Multiple air holes are provided at intervals on the side of the air pipes facing the conveyor line. The quick-drying mechanism is used to quickly dry the glue. A folding heating mechanism is used to fold the bottom of both ends of the valve bag and heat the glue at the three corners of the valve bag. The end of the conveyor line is equipped with a bottom strip unwinding and coating mechanism, which is used to attach the bottom strip to both sides of the valve bag using a bottom strip hot air gun to complete the sealing and forming of the valve bag.

2. The automated valve bag forming equipment according to claim 1, characterized in that, It also includes a crawling mechanism, which includes a first circulating conveying component with rubber feet that can contact the top surface of the valve bag. The crawling mechanism is used to assist the valve bag in entering the conveyor line.

3. The automated valve bag forming equipment according to claim 1, characterized in that, The stand-up opening mechanism includes a stand-up assembly and a suction cup. The suction cup is located at the rear end of the stand-up assembly. The stand-up assembly is used to stand up both ends of the valve pocket, and the suction cup is used to open the two ends of the valve pocket after it has been stood up.

4. The automated valve bag forming equipment according to claim 1, characterized in that, The fork bottom mechanism is provided in two sets, and the two sets of fork bottom mechanisms correspond to the two ends of the valve bag. The fork bottom mechanism includes two sets of second circulation conveying components. The two sets of second circulation conveying components are arranged side by side and correspond to one end of the valve bag opening respectively. Each set of conveying components is provided with a fork bottom foot, and the fork bottom foot is circulatedly conveyed by the second circulation conveying component. A triangular plate is provided at one end of the fork bottom foot.

5. The automated valve bag forming equipment according to claim 1, characterized in that, The valve port patching mechanism includes a valve port patch unwinding and rewinding assembly and a valve port hot air gun. The valve port patch unwinding and rewinding assembly is used to unwind the valve port patch and apply it to the conveyed valve bag. The nozzle of the valve port hot air gun faces the valve port patch.

6. The automated valve bag forming equipment according to claim 1, characterized in that, The folding heating mechanism is provided in two sets, and the two sets of folding heating mechanisms are respectively corresponding to the two ends of the valve bag. The folding heating mechanism includes a standing folding component and a heating plate arranged sequentially along the conveyor line. The heating plate is located at the end of the standing folding component away from the blower drying mechanism, and the heating plate corresponds to the glue position of the valve bag.

7. The automated valve bag forming equipment according to claim 6, characterized in that, The upright folding assembly includes two opposing pressure plates, two upright baffles, and two limiting strips. The two upright baffles are disposed on the pressure plates and the starting ends of the upright baffles are outwardly flared. The two limiting strips are disposed on the pressure plates and the limiting strips are inwardly flared along the conveying direction. The heating plate is connected to the end of the pressure plates.

8. The automated valve bag forming equipment according to claim 2, characterized in that, The conveyor line includes an equipment frame, a steel belt, and multiple steel belt pulleys. The steel belt is fitted onto the steel belt pulleys, and the top of the equipment frame is provided with a magnet that attracts the steel belt. The crawling mechanism is located at the front end of the conveyor line.

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