Stacked paper cup packaging apparatus

Abstract

The present application relates to paper cup packaging equipment technical field, specifically provides a kind of stacked paper cup packaging equipment, including rack, collar shaper and film feeding mechanism are provided on rack, film feeding mechanism transports packaging film to collar shaper, vertical state is provided on rack and is sent material pipe, material pipe passes through collar shaper, gap between collar shaper and material pipe, the gap allows packaging film to pass, the arc-shaped collar surface of collar shaper is equipped with air blowing hole, air blowing hole is connected with air pump, air pump works to make air blowing hole blow out gas, form gas film between arc-shaped collar surface and packaging film, change traditional rigid contact to flexible support, substantially reduce the frictional resistance when packaging film is transported, avoid packaging film surface wear, printing blur, while reducing the tensile deformation and fracture caused by excessive tension, guarantee packaging film integrity and appearance quality.

Description

Technical Field

[0001] This invention relates to the field of paper cup packaging equipment technology, and in particular to a stacking paper cup packaging equipment. Background Technology

[0002] Packaging equipment is a machine that automates the packaging of products, including bagging, boxing, sealing, labeling, bundling, and wrapping. It is widely used in industries such as food, daily necessities, pharmaceuticals, hardware, electronics, and chemicals.

[0003] After paper cups are produced, they need to be packaged using paper cup packaging equipment. Usually, the finished paper cups are stacked together and then packaged in plastic bags. The paper cup packaging equipment mainly includes a vertically placed conveying pipe, a collar forming device, a sealing and cutting station, and a film feeding mechanism. The film feeding mechanism and the collar forming device cover the outer circumference of the conveying pipe. The conveying pipe expands the packaging bag into a cylindrical shape. Then, a certain number of paper cups are stacked together and conveyed from top to bottom through the conveying pipe into the packaging bag. The packaging bag is located at the sealing and cutting station, where the sealing and cutting mechanism seals and cuts the cups, thus completing the packaging of the paper cups.

[0004] However, in the existing technology, the packaging bags or films have a large contact area when passing through the collar forming machine, resulting in significant frictional resistance during transportation. This forces the packaging bags or films to bear excessive tension, and the packaging bags or films are in a state of high stress friction during the forming process. As a result, the packaging bags or films have greater resistance during transportation, which not only leads to severe wear on the surface of the packaging bags and blurred printing, but also easily causes the film to stretch and deform or even break, affecting packaging quality and efficiency. Summary of the Invention

[0005] Therefore, it is necessary to provide a stacking paper cup packaging equipment to address the current problem of poor packaging quality.

[0006] The above objectives are achieved through the following technical solutions:

[0007] A stacking paper cup packaging device, comprising:

[0008] A frame is provided, on which a collar forming device and a film feeding mechanism are provided. The film feeding mechanism feeds packaging film to the collar forming device. A vertical feed pipe is provided on the frame, which passes through the collar forming device. There is a gap between the collar forming device and the outer periphery of the feed pipe, which allows the packaging film to pass through.

[0009] A longitudinal sealing assembly, wherein the longitudinal sealing assembly is used to longitudinally heat seal the packaging film on the outer periphery of the feed tube;

[0010] A horizontal sealing assembly for laterally heat-sealing and cutting the bottom and top of a packaging film;

[0011] The curved collar forming device has multiple air blowing holes on its surface. These holes are connected to an air pump. When the air pump supplies air to the air blowing holes, an air film is formed between the curved collar surface and the packaging film.

[0012] Furthermore, the feeding tube is provided with an air suction hole and a switch assembly. The switch assembly is configured to close the top of the feeding tube when air extraction is required and to open the top of the feeding tube when stacked paper cups are to be filled.

[0013] Furthermore, the switching assembly includes a sealing plate and a telescopic cylinder. The sealing plate is horizontally slidably disposed on the top of the conveying pipe, and the telescopic cylinder is horizontally disposed on the frame. The fixed end of the telescopic cylinder is fixed on the frame, and the telescopic end of the telescopic cylinder is fixedly connected to the sealing plate.

[0014] Furthermore, two elastic plates are axially slidably disposed at the bottom of the conveying pipe. The distance between the upper ends of the two elastic plates is less than the distance between their lower ends, and the upper width of the two elastic plates is greater than the lower width. A limiting component is disposed on the outer wall of the bottom of the conveying pipe. The limiting component is configured to push the lower ends of the two elastic plates closer to each other when the two elastic plates move upward. A power component is disposed at the bottom of the conveying pipe. The power component is used to drive the two elastic plates to move upward.

[0015] Furthermore, the limiting component includes two limiting plates, which are disposed on the outer side of the bottom of the conveying pipe. The positions of the two limiting plates correspond to the positions of the two elastic plates, and the distance between the upper ends of the two limiting plates is less than the distance between their lower ends. The two limiting plates are in sliding contact with the two elastic plates respectively.

[0016] Furthermore, the power assembly includes a sliding ring and an annular groove. The annular groove is formed on the inner wall of the bottom of the conveying pipe. The sliding ring is axially slidably disposed in the annular groove. Multiple channels are provided in the side wall of the conveying pipe. The multiple channels are tubular and evenly distributed circumferentially. The lower ends of the multiple channels are connected to the annular groove, and the upper ends of the multiple channels are connected to the air pump.

[0017] Furthermore, the sliding ring is provided with a vent hole, one end of which is connected to the inner wall of the sliding ring and the other end of which is connected to the top of the sliding ring. The suction hole is provided on the inner wall of the bottom of the conveying pipe, and the end of the vent hole connected to the inner wall of the sliding ring is on the same vertical line as the suction hole.

[0018] Furthermore, the two elastic plates have perforated grooves in the area near the top.

[0019] Furthermore, a material conveying funnel is provided at the upper end of the material conveying pipe, with the small end of the material conveying funnel facing down and the large end facing up.

[0020] Furthermore, the frame is equipped with two conveyor belts located on both sides of the outer periphery of the conveying pipe. The two conveyor belts abut against the packaging film on the outer periphery of the conveying pipe. The frame is equipped with rotating rollers, which are connected to the two conveyor belts in a driving connection.

[0021] The beneficial effects of this invention are:

[0022] This invention features a collar forming device with air blowing holes connected to an air pump. After the air pump supplies air, an air film is formed between the curved collar surface and the packaging film, transforming the traditional rigid contact into flexible support. This significantly reduces the frictional resistance during packaging film transport, preventing wear and blurring of the packaging film surface and printing. It also reduces stretching deformation and breakage caused by excessive tension, ensuring the integrity and appearance quality of the packaging film.

[0023] This invention provides a suction hole and a switch assembly on the feeding pipe. When air extraction is required, the switch assembly seals the top of the feeding pipe, and the air pump extracts the air between the stacked paper cups and the packaging film through the suction hole, achieving a near-vacuum packaging. This completely solves the problem of bag swelling caused by residual air in traditional packaging, reduces the volume of the finished product, facilitates stacking and transportation, and lowers logistics costs.

[0024] This invention features two elastic plates at the bottom of the feeding tube, shaped like outwards, which support the packaging film in a "rounded top and tapered bottom" configuration. When the stacked paper cups fall, their bottoms contact the tapered packaging film. The elastic plates and the packaging film work together to cushion the impact, reducing the rigidity of the free fall and preventing the bottom of the paper cups from collapsing or curling. This significantly improves the yield rate of finished products. Furthermore, during the cushioning process, only the bottom of the paper cups is subjected to force, while the upper part is unrestrained, ensuring that the paper cups remain tightly stacked during dynamic descent, preventing loosening or instability, and further guaranteeing the neatness of the packaged paper cups.

[0025] This invention connects the air pump's suction end to the suction port and the air outlet end to the blowing port, allowing the extracted air to be recycled to form an air film. This eliminates the need for an additional air source, reducing energy consumption and gas waste, and achieving energy conservation, environmental protection, and functional synergy.

[0026] This invention provides a hollowed-out groove in the upper region of the two elastic plates, which makes the two elastic plates more elastically deformable and reduces the resistance encountered when the sliding ring moves upward, thus facilitating the upward movement of the sliding ring. Attached Figure Description

[0027] Figure 1 This is a schematic diagram of the structure of a stacking paper cup packaging device according to an embodiment of the present invention;

[0028] Figure 2 for Figure 1A partial enlarged view of part X of the stacking paper cup packaging equipment provided in one embodiment;

[0029] Figure 3 for Figure 1 A left view of a stacking paper cup packaging device provided in one embodiment;

[0030] Figure 4 for Figure 1 A front view of a stacking paper cup packaging device provided in one embodiment;

[0031] Figure 5 for Figure 4 A cross-sectional view along AA of a stacking paper cup packaging device provided in one embodiment when the sliding ring is not moving upward;

[0032] Figure 6 for Figure 5 A partial enlarged view of part Y of the stacking paper cup packaging equipment provided in one embodiment;

[0033] Figure 7 for Figure 4 A cross-sectional view along AA of a stacking paper cup packaging device provided in one embodiment after the sliding ring moves upward;

[0034] Figure 8 for Figure 7 A partial enlarged view of part Z of a stacking paper cup packaging device provided in one embodiment;

[0035] Figure 9 This is an exploded view of a stacking paper cup packaging device according to an embodiment of the present invention;

[0036] Figure 10 This is a schematic diagram of the structure of the collar forming device and the feeding pipe of a stacked paper cup packaging equipment according to an embodiment of the present invention;

[0037] Figure 11 This is a schematic diagram of the sliding ring and elastic plate of a stacked paper cup packaging device provided in an embodiment of the present invention.

[0038] in:

[0039] 100. Frame; 110. Collar forming device; 111. Collar surface; 112. Air blowing hole; 120. Conveyor roller; 121. Feeding funnel; 130. Longitudinal sealing assembly; 140. Transverse sealing assembly; 150. Discharge plate; 160. Telescopic cylinder; 170. Sealing plate; 180. Control box;

[0040] 200, conveying pipe; 201, channel; 210, suction port; 220, air pump; 230, elastic plate; 231, hollow groove; 240, sliding ring; 241, vent hole; 250, annular groove; 260, limiting plate; 270, suction pipe; 280, blowing pipe;

[0041] 300. Conveyor belt; 310. Rotating roller;

[0042] 400. Packaging film. Detailed Implementation

[0043] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below through embodiments and in conjunction with the accompanying drawings. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

[0044] The component designations used in this document, such as "first" and "second," are merely for distinguishing the described objects and do not have any sequential or technical meaning. The terms "connection" and "linkage" used in this invention, unless otherwise specified, include both direct and indirect connections (linkages). It should be understood that the terms "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as limiting the invention.

[0045] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can mean that the first feature is in direct contact with the second feature, or that the first feature is in indirect contact with the second feature through an intermediate medium. Furthermore, "above," "over," and "on top" of the second feature can mean that the first feature is directly above or diagonally above the second feature, or simply that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature can mean that the first feature is directly below or diagonally below the second feature, or simply that the first feature is at a lower horizontal level than the second feature.

[0046] The following reference Figures 1-11 This invention describes a stacking paper cup packaging device.

[0047] A stacked paper cup packaging device is suitable for packaging stacked paper cups (stacked paper cups refer to multiple paper cups axially nested together). It includes a frame 100, on which a collar forming device 110 and a film feeding mechanism are mounted. The film feeding mechanism conveys a packaging film 400 to the collar forming device 110. A vertical feed pipe 200 is mounted on the frame 100, passing through the collar forming device 110. A gap exists between the outer periphery of the feed pipe 200 and the collar forming device 110, allowing the packaging film 400 to pass through. The packaging film 400 passes through the arc-shaped collar surface 111 of the collar forming device 110 from the film feeding mechanism, then through the gap to cover the outer periphery of the feed pipe 200, forming a cylindrical shape. A longitudinal sealing assembly 130 is also mounted on the frame 100. The horizontal sealing component 140 and the vertical sealing component 130 are used to heat seal the packaging film 400 longitudinally, that is, to heat seal the connection position where the packaging film 400 forms a cylinder. The horizontal sealing component 140 is located below the vertical sealing component 130. The horizontal sealing component 140 is used to heat seal and cut the bottom and top of the packaging film 400 laterally. That is, the horizontal sealing component 140 is used to cut the formed cylindrical packaging film 400 into individual packages. When stacked paper cups enter the cylindrical packaging film 400, they are heat-sealed and cut by the horizontal sealing component 140. The bottom of the horizontal sealing component 140 is provided with a discharge plate 150. The discharge plate 150 is set at an angle. The cut individual packages fall on the discharge plate 150 and slide from top to bottom on the discharge plate 150 into the collection cylinder (not shown in the figure) to complete the collection of individual packages.

[0048] In traditional collar forming machines 110, the curved collar surface 111 rubs against the packaging film 400, resulting in a large contact area. During the conveying process of the packaging film 400, the surface of the packaging film 400 suffers significant wear, thus affecting the quality of the packaging film 400. Therefore, this invention provides multiple air holes 112 on the curved collar surface 111 of the collar forming machine 110, and an air pump 220 is installed on the frame 100. The air pump 220 is connected to the multiple air holes 112. When the air pump 220 is started, it blows air through the air holes 112, thereby forming an air film between the curved collar surface 111 and the packaging film 400, thereby reducing the wear between the packaging film 400 and the curved collar surface 111, and thus ensuring the quality of the packaging film 400.

[0049] In a further embodiment, after the stacked paper cups enter the packaging film 400, there is a large gap between them and the packaging film 400. After the horizontal sealing component 140 heat-seals the packaging film 400, a large amount of air inside the packaging film 400 cannot be discharged in time. The gas is forcibly sealed inside the packaging film 400, which easily leads to bag swelling, resulting in increased finished product volume, stacking difficulties, and significantly increased material transportation costs. Therefore, the present invention provides an air suction hole 210 on the conveying pipe 200 and a switch component on the conveying pipe 200. The switch component can control the opening and closing of the upper end of the conveying pipe 200. The switch component is configured to close the top of the conveying pipe 200 when air suction is needed and open the top of the conveying pipe 200 when stacked paper cups need to be filled.

[0050] It should be noted that when the upper end of the feeding pipe 200 is blocked, the suction hole 210 can suck out the air between the stacked paper cups and the packaging film 400, thereby reducing the air in the packaging film 400 and making the packaging film 400 around the stacked paper cups form a state similar to vacuum packaging, thus avoiding the phenomenon of bag expansion; while when the upper end of the feeding pipe 200 is open, it is convenient for the stacked paper cups to enter the feeding pipe 200.

[0051] Specifically, the switching assembly in this embodiment includes a blocking plate 170 and a telescopic cylinder 160. The blocking plate 170 is horizontally slidably disposed on the top of the feed pipe 200, and the telescopic cylinder 160 is horizontally disposed on the frame 100. The telescopic cylinder 160 can be a pneumatic cylinder or a hydraulic cylinder, and no specific limitation is made here. The fixed end of the telescopic cylinder 160 is fixedly connected to the frame 100, and the telescopic end of the telescopic cylinder 160 is fixedly connected to the blocking plate 170. When the telescopic end of the telescopic cylinder 160 extends or retracts, it drives the blocking plate 170 to slide horizontally, thereby blocking or opening the upper end of the feed pipe 200.

[0052] In a further embodiment, when stacked paper cups are conveyed through the conveying pipe 200, the stacked paper cups slide from the upper end to the lower end of the conveying pipe 200. The stacked paper cups accumulate kinetic energy in the state of free fall, and generate a large rigid impact at the moment of bottoming out, which can easily cause the bottom of the stacked paper cups to collapse or curl and deform, seriously reducing the qualification rate of the finished products.

[0053] Based on this, in this embodiment, two elastic plates 230 are axially slidably arranged at the bottom of the conveying pipe 200, such as... Figure 5 , Figure 6 and Figure 11As shown, the distance between the upper ends of the two elastic plates 230 is less than the distance between the lower ends, thus forming an outward-pointing structure. Furthermore, the width of the upper ends of the two elastic plates 230 is greater than the width of the lower ends, which supports the packaging film 400. This results in the packaging film 400 at the bottom of the conveyor tube 200 having a cylindrical shape at the top and a gradually tapering rectangular shape at the bottom. When the stacked paper cups moving from top to bottom within the conveyor tube 200 enter the packaging film 400, the bottom of the stacked paper cups contacts the tapering portion of the packaging film 400. This portion of the packaging film 400 slows down the descent speed of the stacked paper cups, reducing their kinetic energy and preventing rigid impact on the bottom. This avoids the bottom of the stacked paper cups collapsing or curling. Since the upper part of the stacked paper cups does not contact the tapering portion of the packaging film 400, the upper part of the stacked paper cups is not cushioned. This ensures that the stacked paper cups remain tightly stacked during dynamic descent, effectively preventing them from becoming loose or unstable, thus improving the yield rate of the finished product.

[0054] It should be noted that a limiting component is provided at the bottom of the conveying pipe 200 in this embodiment. The limiting component is configured to push the lower ends of the two elastic plates 230 closer to each other when the two elastic plates 230 move upward. That is, when the packaging film 400 is de-aired, the degree of support of the two elastic plates 230 on the packaging film 400 is weakened. In addition, a power component is provided at the bottom of the conveying pipe 200, which is used to drive the two elastic plates 230 to move upward.

[0055] Specifically, the limiting components include two limiting plates 260, such as Figure 6 and Figure 8 As shown, two limiting plates 260 are disposed on the outer side of the bottom of the conveying pipe 200. The positions of the two limiting plates 260 correspond to the positions of the two elastic plates 230, respectively. The distance between the upper ends of the two limiting plates 260 is also less than the distance between their lower ends. The lengths of the two limiting plates 260 are very short, and the two limiting plates 260 slide in contact with the two elastic plates 230. The limiting plates 260 are rigid and do not deform, while the elastic plates 230 are elastic. When the stacked paper cups fall to the bottom of the packaging film 400, the two elastic plates 230 move upward. Since the two elastic plates 230 are in a V-shape and slide in contact with the two limiting plates 260, they can be pushed by the two limiting plates 260 when they move upward, thereby bringing the lower ends of the two elastic plates 230 closer together and reducing the degree of support of the two elastic plates 230 on the packaging film 400.

[0056] More specifically, the power assembly in this embodiment includes a sliding ring 240 and an annular groove 250. The annular groove 250 is formed inside the bottom inner wall of the conveying pipe 200. The sliding ring 240 is axially slidably disposed within the annular groove 250. A limit ring is provided on the sliding ring 240 to prevent the sliding ring 240 from disengaging from the annular groove 250. The sliding ring 240 is fixedly connected to the upper ends of the two elastic plates 230. To enable the sliding ring 240 to move upward, the side wall of the conveying pipe 200 in this embodiment is provided with... Multiple channels 201 are provided, all of which are tubular and evenly distributed circumferentially within the side wall of the conveying pipe 200. The lower ends of the multiple channels 201 are connected to the annular groove 250. The air pump 220 is provided with an air suction pipe 270 and an air blowing pipe 280. One end of the air blowing pipe 280 is connected to the air outlet of the air pump 220, and the other end of the air blowing pipe 280 is connected to the air blowing hole 112. One end of the air suction pipe 270 is connected to the air inlet of the air pump 220, and the other end of the air suction pipe 270 is connected to the channel 201. When the air pump 220 is not started, the sliding ring 240 is at the bottom of the annular groove 250. When the air pump 220 is started, the air pump 220 extracts the gas in the annular groove 250 through the suction pipe 270 and the channel 201. The reduction of gas in the annular groove 250 makes the annular groove 250 a negative pressure state. The sliding ring 240 moves upward under the negative pressure. The sliding ring 240 drives the two elastic plates 230 to move upward synchronously. The lower ends of the two elastic plates 230 move closer to each other under the push of the two limiting plates 260, thereby reducing the degree of support of the two elastic plates 230 on the packaging film 400.

[0057] It should be noted that, in order to enable the suction port 210 to communicate with the air pump 220, a vent 241 is provided on the sliding ring 240 in this embodiment. One end of the vent 241 is connected to the inner wall of the sliding ring 240, and the other end of the vent 241 is connected to the top of the sliding ring 240. The suction port 210 is located on the inner wall of the bottom of the conveying pipe 200. The end of the vent 241 connected to the inner wall of the sliding ring 240 is on the same vertical line as the suction port 210. When the sliding ring 240 is not moving upward, the suction port 210 is located at the vent 220. Above 41, the two are not connected; when the sliding ring 240 moves upward, the vent 241 gradually approaches the suction hole 210. After the suction hole 210 and the vent 241 are connected, the air pump 220 sucks away the gas between the stacked paper cups and the packaging film 400 through the channel 201, the vent 241 and the suction hole 210. At this time, the gas sucked away is transported by the air pump 220 through the blowing pipe 280 to the blowing hole 112. The blowing hole 112 blows out the gas, thereby forming an air film on the arc-shaped collar surface 111 of the packaging film 400 and the collar forming device 110.

[0058] In a further embodiment, to make it easier for the two elastic plates 230 to be pushed by the two limiting plates 260, in this embodiment, the two elastic plates 230 are provided with hollow grooves 231 near the upper part, such as... Figure 11 As shown, the hollow groove 231 makes it easier for the two elastic plates 230 to deform elastically, and also makes the resistance encountered by the sliding ring 240 when it moves upward less, thus facilitating the upward movement of the sliding ring 240.

[0059] In a further embodiment, to facilitate the conveying of stacked paper cups into the conveying pipe 200, a conveying funnel 121 is provided at the upper end of the conveying pipe 200, such as... Figure 2 As shown, the material conveying funnel 121 is generally conical, with the small end of the material conveying funnel 121 facing down and the large end facing up. The diameter of the small end of the material conveying funnel 121 is slightly larger than the maximum diameter of the stacked paper cups, so as to facilitate the input of the stacked paper cups into the material conveying pipe 200.

[0060] Specifically, the film feeding mechanism in this embodiment includes multiple conveying rollers 120, the axes of which are parallel to each other, and the packaging film 400 is wound around the multiple conveying rollers 120. The multiple conveying rollers 120 are all existing technologies and will not be described in detail here.

[0061] Specifically, the longitudinal sealing component 130 and the transverse sealing component 140 in this embodiment are also existing technologies, and will not be described in detail here.

[0062] In a further embodiment, to enable the packaging film 400 to move around the outer periphery of the conveying pipe 200, a conveyor belt 300 is provided on the frame 100 of this embodiment, such as... Figure 5 As shown, there are two conveyor belts 300, which are located on both sides of the outer periphery of the conveying pipe 200 and abut against the packaging film 400 on the outer periphery of the conveying pipe 200. The frame 100 is also equipped with a rotating roller 310, which is connected to the two conveyor belts 300 for transmission. The rotating roller 310 drives the two conveyor belts 300 to rotate. When the conveyor belts 300 rotate, they can drive the packaging film 400 to move from top to bottom on the outer periphery of the conveying pipe 200, thereby conveying the packaging film 400.

[0063] Specifically, in this embodiment, a control box 180 is provided on the frame 100. The control box 180 is connected to components such as the longitudinal sealing assembly 130, the transverse sealing assembly 140, the air pump 220, and the telescopic cylinder 160 via wires to realize the linkage control of the action sequence.

[0064] The specific working process of the stacking paper cup packaging equipment provided by the present invention will be described in conjunction with the above embodiments:

[0065] The operator first wraps the packaging film 400 around multiple conveyor rollers 120, and then passes the end of the packaging film 400 through the arc-shaped collar surface 111 of the collar forming device 110. The packaging film 400 is then fed into the gap between the collar forming device 110 and the feed pipe 200. The operator pulls the end of the packaging film 400 downward and passes it through two conveyor belts 300. Then, the end of the packaging film 400 passes through the longitudinal sealing assembly 130, which longitudinally seals the cylindrical packaging film 400. When the packaging film 400 passes the bottom of the feed pipe 200, two elastic plates 230 support the packaging film 400 to form a cylindrical shape at the top and a rectangular shape at the bottom. The packaging film 400 then passes through the transverse sealing assembly 140, which transversely seals the end of the packaging film 400 and holds the end of the packaging film 400 in place.

[0066] Before the stacked paper cups are conveyed, the telescopic end of the telescopic cylinder 160 shortens, thereby causing the sealing plate 170 to open the upper end of the conveying pipe 200. The stacked paper cups enter the conveying pipe 200 from the conveying funnel 121 at the upper end of the conveying pipe 200. Under the action of gravity, the stacked paper cups slide from the upper end of the conveying pipe 200 to the lower end and are discharged from the lower end, thus entering the packaging film 400. When the stacked paper cups slide out of the lower end of the conveying pipe 200, their bottoms will contact the packaging film 400 in a gradually shrinking state. The packaging film 400 can play a buffering role to avoid the bottom of the stacked paper cups being subjected to rigid impact. At the same time, the upper end of the stacked paper cups does not contact the packaging film 400. The stacked paper cups can always maintain a tight stacked state during the dynamic falling process, preventing the stacked paper cups from becoming loose or unstable.

[0067] As the stacked paper cups slowly fall into place, the telescopic end of the telescopic cylinder 160 extends, thereby driving the sealing plate 170 to seal the upper end of the conveying pipe 200. Simultaneously, the air pump 220 starts, drawing air from the suction pipe 270. Since the suction pipe 270 connects to the channel 201, which is connected to the annular groove 250 where the sliding ring 240 is located, the gas in the annular groove 250 decreases. Under the negative pressure in the annular groove 250, the sliding ring 240 moves upward, causing the two elastic plates 230 to move upward synchronously. Under the action of the two limiting plates 260, the lower ends of the two elastic plates 230 move closer together. The support of the two elastic plates 230 on the packaging film 400 is weakened, and the vent 241 on the sliding ring 240 gradually connects with the suction hole 210 on the side wall of the annular groove 250. When the vent 241 connects with the suction hole 210, the gas in the conveying pipe 200 can be extracted, that is, the air between the packaging film 400 and the stacked paper cups is extracted. The air pump 220 draws the gas into the blowing pipe 280. The gas in the blowing pipe 280 is discharged through the blowing hole 112 to the arc-shaped lapel surface 111 of the packaging film 400 and the lapel forming device 110. At this time, an air film is formed on the arc-shaped lapel surface 111 of the lapel forming device 110.

[0068] Simultaneously, the horizontal sealing assembly 140 opens, allowing the packaging film 400 to pass through. The conveyor belt 300 transports the packaging film 400 from top to bottom around the outer periphery of the feed tube 200. The packaging film 400 simultaneously slides on the arc-shaped lapel surface 111 of the lapel forming device 110. Because an air film is formed on the arc-shaped lapel surface 111 of the lapel forming device 110, the wear on the packaging film 400 is reduced when passing through the lapel forming device 110, thus ensuring the quality of the packaging film 400. Under the influence of gravity, the stacked paper cups pull the packaging film 400 from top to bottom through the elastic plate 230, preventing wrinkles from forming. After the portion of the packaging film 400 covering the stacked paper cups passes the horizontal sealing assembly 140, the horizontal sealing assembly 140 horizontally heat-seals and cuts the upper portion of the packaging film 400, thus completing the packaging of the stacked paper cups.

[0069] Subsequently, the air pump 220 stops. After the air pump 220 stops, the air pressure in the annular groove 250 returns to normal. Under the action of its own gravity and the elastic reset action of the elastic plate 230, the sliding ring 240 slides downward in the annular groove 250 and returns to its original position. At the same time, the telescopic end of the telescopic cylinder 160 shortens to open the upper end of the conveying pipe 200, thereby continuing to convey stacked paper cups. This cycle is repeated to continuously package stacked paper cups.

[0070] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0071] The embodiments described above are merely illustrative of several implementations of the present invention, and while the descriptions are specific and detailed, they should not be construed as limiting the scope of the invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A stacking paper cup packaging device, characterized in that, include: A frame is provided, on which a collar forming device and a film feeding mechanism are provided. The film feeding mechanism feeds packaging film to the collar forming device. A vertical feed pipe is provided on the frame, which passes through the collar forming device. There is a gap between the collar forming device and the outer periphery of the feed pipe, which allows the packaging film to pass through. A longitudinal sealing assembly, wherein the longitudinal sealing assembly is used to longitudinally heat seal the packaging film on the outer periphery of the feed tube; A horizontal sealing assembly for laterally heat-sealing and cutting the bottom and top of a packaging film; The arc-shaped collar forming device has multiple air blowing holes on its surface. These holes are connected to an air pump. When the air pump supplies air to the air blowing holes, an air film is formed between the arc-shaped collar surface and the packaging film. The feeding tube is provided with an air suction hole and a switch assembly. The switch assembly is configured to close the top of the feeding tube when air suction is required and open the top of the feeding tube when stacked paper cups are to be filled. The switching assembly includes a blocking plate and a telescopic cylinder. The blocking plate is horizontally slidably disposed on the top of the conveying pipe. The telescopic cylinder is horizontally disposed on the frame. The fixed end of the telescopic cylinder is fixed on the frame, and the telescopic end of the telescopic cylinder is fixedly connected to the blocking plate. Two elastic plates are axially slidably disposed at the bottom of the conveying pipe. The distance between the upper ends of the two elastic plates is less than the distance between their lower ends, and the width of the upper ends of the two elastic plates is greater than the width of their lower ends. A limiting component is disposed on the outer wall of the bottom of the conveying pipe. The limiting component is configured to push the lower ends of the two elastic plates closer to each other when the two elastic plates move upward. A power component is disposed at the bottom of the conveying pipe. The power component is used to drive the two elastic plates to move upward. The power assembly includes a sliding ring and an annular groove. The annular groove is formed on the inner wall of the bottom of the conveying pipe. The sliding ring is axially slidably disposed in the annular groove. Multiple channels are provided in the side wall of the conveying pipe. The multiple channels are all tubular and evenly distributed circumferentially. The lower ends of the multiple channels are connected to the annular groove, and the upper ends of the multiple channels are connected to the air pump. The sliding ring has a vent hole, one end of which is connected to the inner wall of the sliding ring and the other end of which is connected to the top of the sliding ring. The suction hole is located on the inner wall of the bottom of the conveying pipe, and the end of the vent hole connected to the inner wall of the sliding ring is on the same vertical line as the suction hole.

2. The stacking paper cup packaging equipment according to claim 1, characterized in that, The limiting component includes two limiting plates, which are disposed on the outer side of the bottom of the conveying pipe. The positions of the two limiting plates correspond to the positions of the two elastic plates, and the distance between the upper ends of the two limiting plates is less than the distance between their lower ends. The two limiting plates slide in contact with the two elastic plates respectively.

3. The stacking paper cup packaging equipment according to claim 1, characterized in that, The two elastic plates have perforated grooves near the top.

4. The stacking paper cup packaging equipment according to claim 1, characterized in that, A material conveying funnel is provided at the upper end of the material conveying pipe, with the small end of the material conveying funnel facing down and the large end facing up.

5. The stacking paper cup packaging equipment according to claim 1, characterized in that, The frame is equipped with two conveyor belts located on both sides of the outer periphery of the conveying pipe. The two conveyor belts abut against the packaging film on the outer periphery of the conveying pipe. The frame is equipped with rotating rollers that are connected to the two conveyor belts for transmission.

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