Paper-plastic cup cover film processing production line

Abstract

The utility model discloses a paper plastic cup cover film processing production line for adding filter screen in the drinking position after paper plastic cup cover shaping, and the processing production line includes the punch -cutting unit, adjustment unit, visual detection unit, arrangement unit, cup cover adjustment unit, gluing unit, film coating unit, hot pressing unit, optical detection unit and stacking unit connected in proper order, and the utility model can improve the accuracy and production efficiency of film coating, and can be widely applied to the drinking film coating field of various cup covers.

Description

Technical Field

[0001] This utility model relates to the field of paper-plastic cup lid processing technology, and in particular to a paper-plastic cup lid coating processing production line. Background Technology

[0002] Paper-plastic cup lids have a wide market application, used in various beverages. With the promotion of healthy drinks, tea beverages and some traditional brewed drinks are becoming increasingly popular. These drinks require filtering out the tea leaves and other brewing residue before brewing. Currently, the main practice is to filter them out before brewing, but this may result in a weak taste due to insufficient brewing time. Therefore, some companies are placing the brewing residue inside the cup. This necessitates adding a filter to the spout of the lid to prevent the residue from entering the mouth. Currently, there are no paper-plastic cup lids with this type of integrated filter on the market. Therefore, it is necessary to develop a paper-plastic cup lid with an integrated filter on the spout, and to design a new processing method and corresponding production line to meet the production requirements of paper-plastic cup lids with integrated filters on the spout. Utility Model Content

[0003] The purpose of this utility model is to provide a paper-plastic cup lid coating processing production line, which is used to attach a filter screen to the drinking spout of the paper-plastic cup lid, thereby achieving efficient and automated production processing.

[0004] The technical solution adopted by this utility model to solve its technical problem is: a paper-plastic cup lid coating processing production line, characterized in that: it includes a punching unit, an adjustment unit, a vision inspection unit, an arrangement unit, a cup lid adjustment unit, an adhesive coating unit, a coating unit, a hot pressing unit, an optical inspection unit, and a stacking unit connected in sequence; the punching unit punches the integrally formed paper-plastic cup lid into independent paper-plastic cup lids; the adjustment unit adjusts the punched paper-plastic cup lids into a single row for forward conveying; the vision inspection unit inspects each paper-plastic cup lid and rejects unqualified products; the arrangement unit arranges the paper-plastic cup lids into multiple rows;

[0005] The cup lid adjustment unit adjusts the orientation of the cup lid to ensure that the drinking spout of the paper-plastic cup lid maintains a consistent orientation.

[0006] The gluing unit applies glue to the drinking spout of the paper-plastic cup lid; the film-coating unit cuts the continuous mesh belt and then attaches the cut filter screen to the drinking spout of the paper-plastic cup lid; the hot-pressing unit hot-presses the filter screen to the drinking spout; the optical detection unit detects the paper-plastic cup lid and screens out products with unqualified filter screens; the stacking unit completes the counting and stacking of the paper-plastic cup lids.

[0007] The beneficial effects of this utility model are: the processing production line of this utility model can quickly complete the coating of paper-plastic cup lids and drinking spouts, which is highly efficient and can ensure the qualification rate of the coating.

[0008] The present invention will be described in more detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0009] Figure 1 This is a process flow diagram of the present invention.

[0010] Figure 2 This is a three-dimensional structural diagram of the production line in this utility model.

[0011] Figure 3 This is a three-dimensional structural diagram of the adjustment unit in this utility model.

[0012] Figure 4 This is a three-dimensional structural diagram of the arrangement unit and the cup lid adjustment unit in this utility model.

[0013] Figure 5 This is a partial structural diagram of the guide groove in this utility model.

[0014] Figure 6 This is a schematic diagram of the adjusting motor and its cooperating structure in the cup lid adjusting unit of this utility model.

[0015] Figure 7 This is a three-dimensional structural diagram of the adhesive coating unit in this utility model.

[0016] Figure 8 This is a three-dimensional structural diagram of the coating unit in this utility model.

[0017] Figure 9 This is a schematic diagram of the structure of the carrier transfer line and the carrier in this utility model.

[0018] Figure 10 This is a three-dimensional structural diagram of the hot pressing unit in this utility model.

[0019] Figure 11 This is a three-dimensional structural diagram of the stacking unit in this utility model.

[0020] Figure 12 This is a schematic diagram of the feeding guide rail and its mating structure in this utility model. Detailed Implementation

[0021] Examples, such as Figures 1 to 12 As shown, a paper-plastic cup lid coating production line is used to add a filter screen to the drinking spout after the paper-plastic cup lid has been formed. The purpose of this production line is to improve the accuracy of filter screen attachment and ensure the product qualification rate. The specific process includes the following steps: punching, adjustment, and conveying - visual inspection - secondary arrangement - orientation adjustment - adhesive application - coating - hot pressing and film fixing - optical inspection - stacking and output. This invention can improve the accuracy of coating and production efficiency.

[0022] The production line includes, in sequence, a punching unit 1, an adjustment unit 2, a vision inspection unit 3, an arrangement unit 4, a cup lid adjustment unit 5, an adhesive application unit 6, a film coating unit 7, a hot pressing unit 8, an optical inspection unit 9, and a stacking unit 10.

[0023] The punching, adjusting, and conveying step involves punching the one-piece paper-plastic cup lid into individual cup lids using the punching unit 1. Then, the adjusting unit 2 adjusts the cup lids into a single row for forward conveying to the vision inspection unit 3. Each cup lid is inspected for damage, and defective products are rejected. Qualified cup lids are conveyed to the arranging unit 4 for grouping, converting the single row into multiple rows. The cup lid adjusting unit 5 then picks up the cup lids from the arranging unit and adjusts their orientation to ensure consistent drinking spout orientation before placing them on a carrier. The cup lids are then transferred to the gluing unit 6 for gluing the drinking spouts. After gluing, the film coating unit 7 cuts and attaches the filter screen to the drinking spout, and the hot pressing unit 8 heat-presses and fixes the filter screen. After the film coating is completed, the paper-plastic cup lid is inspected by the optical detection unit 9 to screen out unqualified products. Finally, the paper-plastic cup lid is counted and stacked by the stacking unit 10 to facilitate bagging and packaging.

[0024] The punching unit 1 includes a punching machine 11, which is existing technology and will not be described in detail here. The adjustment unit 2 includes an adjustment conveyor belt 21 and a gripping robot 22. The gripping robot 22 includes a frame 221, a horizontal slide rail 222 mounted on the frame 221, and a horizontally movable slide block 223 mounted on the horizontal slide rail 222. The slide block 223 is equipped with a first vertical slide rail 224, and a vertically movable robot arm 225 is mounted on the first vertical slide rail 224. The robot arm 225 is equipped with a vacuum suction cup 226, and the vacuum suction cup 226 is equipped with a set of negative pressure suction nozzles 227. The negative pressure suction nozzles 227 are used to hold the punched paper-plastic cup lid, and then the vertical movement of the robot arm 225 and the horizontal movement of the slide block 223 are used to transfer the paper-plastic cup lid from the punching machine 11 to the adjustment conveyor belt 21. The adjustable conveyor belt 21 is equipped with a figure-eight shaped guide structure 23. Under the action of the guide structure 23, the paper-plastic cup lid is eventually adjusted from being conveyed forward in multiple rows to being conveyed forward in a single row.

[0025] The visual inspection unit 3 includes an inspection machine 31, which includes a single-row conveyor belt 311 connected to the adjusting conveyor belt 21 and an AOI visual inspection machine. The AOI visual inspection machine is existing technology. The machine takes pictures and uploads them to a computer. It analyzes the pictures to detect whether the paper-plastic cup lids are qualified and removes unqualified products from the single-row conveyor belt 311.

[0026] The arrangement unit 4 includes an arrangement worktable 41 that connects to a single-row conveyor belt 31. The height of the arrangement worktable 41 is lower than that of the single-row conveyor belt 31. A guide groove 42 is provided between the single-row conveyor belt 31 and the arrangement worktable 41 to allow the paper-plastic cup lid to flip. The guide groove 42 includes a transition ramp 421 that connects to the single-row conveyor belt 31 and a flipping ramp 422 that connects to the arrangement worktable 41. The tilt angle of the flipping ramp 422 relative to the arrangement worktable 41 is 100-120°. When the paper-plastic cup lid slides down from the flipping ramp 422, the side edge of the paper-plastic cup lid first disengages from the arrangement worktable 41, and then tilts under the action of the flipping ramp 422, causing the paper-plastic cup lid to change from its original front-facing to its inner-facing. Here, the front of the paper-plastic cup lid refers to the side exposed when it is placed on the cup, and the inner side refers to the side located inside the cup.

[0027] An air blowing device 45 is installed on the arranging worktable 41, which moves the paper-plastic cup lids that have slid down from the guide groove 42 forward. A set of dividing ribs 43 arranged along the conveying direction of the paper-plastic cup lids is also provided on the arranging worktable 41. The distance from adjacent dividing ribs 43 and the outermost dividing rib 43 to the side of the worktable 41 is adapted to the diameter of the paper-plastic cup lids, thereby forming multiple arranging channels 44 on the arranging worktable 41. By adjusting the air output and air output angle of the air blowing device 45, the paper-plastic cup lids are directed into different arranging channels 44, thus forming multiple rows of paper-plastic cup lids. The air blowing device 45 has the advantages of simple structure and low cost.

[0028] The cup lid adjustment unit 5 includes a cup lid adjustment worktable 51 and a carrier conveyor belt 510 set on the cup lid adjustment worktable 51. A carrier is placed on the carrier conveyor belt 510 and can drive the carrier to move forward. The cup lid adjustment worktable 51 is provided with two longitudinal guide rails 52, which extend all the way to the top of the arrangement worktable 41. Between the two longitudinal guide rails 52 is a transverse guide rail 53 that can move back and forth along the longitudinal guide rails 52. A transverse moving seat 54 that moves back and forth on the transverse guide rail 53 is provided on the transverse moving seat 54. A second vertical slide rail 55 is provided on the second vertical slide rail 55, and a movable plate 56 that moves up and down along the second vertical slide rail 55 is provided at the front end of the movable plate 56. A set of cameras 57 is provided at the front end of the movable plate 56 to take pictures of the paper-plastic cup lid to determine the drinking spout position. Behind the cameras 57 are multiple rows of independently controlled adjustment motors 58. The output shaft of each adjustment motor 58 is provided with a negative pressure suction rod 59 for adsorbing the paper-plastic cup lid. The number of adjustment motors 58 in each row matches the number of arrangement channels 44. In this embodiment, there are four arrangement channels 44, therefore, there are also four adjustment motors 58 in each row. During adjustment, the movable plate 56 is first moved along the longitudinal guide rail 52 to above the arrangement worktable 41. During the movement, the camera 57 takes pictures to obtain the placement angle of each paper-plastic cup lid. Then, the movable plate 56 moves downward and uses the negative pressure suction rod 59 to pick up the paper-plastic cup lid placed in the arrangement channel 44. Then, the movable plate 56 is controlled to move upward along the longitudinal guide rail 52 back to the cup lid adjustment worktable 51. Then, the movable plate 56 is controlled to move downward again, placing the paper-plastic cup lid on the carrier 100 on the carrier conveyor belt 510. The carrier 100 is provided with a set of punches adapted to the paper-plastic cup lid, and the paper-plastic cup lid is fixed by snapping onto the punches. During the movement of the movable plate 56, each adjustment motor 58 rotates according to the angle of the corresponding gripped paper-plastic cup lid 200, so that the position and orientation of the drinking spout of each paper-plastic cup lid are consistent.

[0029] The gluing unit 6, laminating unit 7, hot pressing unit 8, and optical inspection unit 9 are all located on the carrier transfer line 20. The carrier 100, carrying a paper-plastic cup lid, passes sequentially through the gluing unit 6, laminating unit 7, hot pressing unit 8, and optical inspection unit 9 on the carrier transfer line 20. The carrier transfer line 20 includes two conveyor chains 201, which are connected to the carrier conveyor belt 510. The rotation of the carrier conveyor belt 510 drives the carrier 100 from the carrier conveyor belt 510 onto the carrier transfer line 20, and the carrier 100 moves forward under the drive of the conveyor chains 201.

[0030] At least at the positions of the glue application unit 6, the film coating unit 7, the hot pressing unit 8, and the optical inspection unit 9, a carrier positioning device 202 is provided on the carrier transfer line 20. When the carrier arrives at the corresponding unit, the carrier positioning device 202 clamps and positions the carrier, and then the corresponding unit starts working. After the work is completed, the carrier positioning device 202 is released, the conveyor chain 201 works, and the carrier 100 is transferred to the next unit.

[0031] The glue application unit 6 includes multiple dispensing servo modules 60 arranged along the carrier transfer line 20 to improve dispensing efficiency. Each dispensing servo module 60 includes a glue application frame 61 that can move back and forth, a transverse guide rail 62 mounted on the glue application frame 61, a longitudinal guide rail 63 that moves back and forth on the transverse guide rail 62, and a glue injection bracket 64 that can move up and down on the longitudinal guide rail 63. A row of glue applicators 65 is mounted on the glue injection bracket 64. The glue applicators 65 can adopt a needle-type dispensing structure. During glue application, the glue injection bracket 64 moves downwards, bringing the glue outlet of the glue applicator 65 closer to the paper-plastic cup lid. Then, through the back-and-forth movement of the glue application frame 61 and the left-and-right movement of the longitudinal guide rail 63, the needle-type dispensing head of the glue applicator 65 moves along the edge of the drinking spout, achieving glue application to the drinking spout. The glue applicator 65 can also use a contoured sponge pressing head, which is customized according to the edge shape of the drinking sponge. The sponge is quantitatively soaked by the glue extrusion, and the glue injection bracket 64 moves up and down to apply the glue to the drinking sponge of the cup lid in batches.

[0032] The coating unit 7 includes multiple coating machines 70 arranged along the carrier transfer line 20. Each coating machine 70 includes a filter screen cutting device 71 and a filter screen attaching device 72. The filter screen cutting device 71 includes a feed roll 711 and a take-up roll 712 disposed on one side of the carrier transfer line 20, and a set of cutter assemblies 713 disposed between the feed roll 711 and the take-up roll 712. The cutter assembly 713 includes a lower cutter 7131 fixedly disposed on the carrier transfer line 20. The shape of the lower cutter 7131 is adapted to the shape of the drinking spout. An upper punch 7132 cooperates with the lower cutter 7131 to complete the punching. The upper punch 7132 is connected to a punch cylinder 7133. The movement of the punch cylinder 7133 drives the upper punch 7132 to move. The upper punch 7132 cooperates with the lower cutter 7131 to complete the punching.

[0033] The filter attaching device 72 includes a first lead screw assembly 721 and a second lead screw assembly 722 horizontally mounted above the carrier transfer line 20, and a movable plate 723 that moves laterally between the first lead screw assembly 721 and the second lead screw assembly 722. A set of gripping cylinders 724 that move up and down are provided on the movable plate 723. A negative pressure gripping head 725 is fixedly provided at the movable end of the gripping cylinder 724. Two negative pressure gripping heads 725 are arranged side by side. The negative pressure gripping heads 724 are used to grab the punched filter and move and place it on the drinking spout of the paper-plastic cup lid.

[0034] The hot pressing unit 8 includes a lower support platform 81 that can move up and down, supporting the carrier 100. A set of hot pressing molds 82 that can move up and down are positioned directly above the lower support platform 81. The number of hot pressing molds 82 matches the number of paper-plastic cup lids 200 on the carrier. The lower support platform 81 drives the carrier 100 upwards. Once the carrier reaches a set position, clamping cylinders 86 on both sides clamp the carrier 100. Simultaneously, the hot pressing molds 82 move downwards under the drive of pressing cylinders 85, completing the hot pressing forming of the paper-plastic cup lids 200. Below the lower support platform 81 is a lifting cylinder (not shown in the figure) that drives the lower support platform 81 to move up and down. Figure 10 As shown, the two carriers 100 represent two states of the carrier 100: one is the state where it is placed on the carrier transfer line 20, and the other is the state during hot pressing. During hot pressing, the lifting cylinder maintains a constant pressure, and the lower support platform 81 provides an upward force, while the hot pressing mold 82 provides a downward force, which can better achieve the stability and effect of hot pressing. To further improve the effect of hot pressing, the hot pressing mold 82 is provided with a contoured metal hot pressing head 821. To prevent the paper-plastic cup lid from adhering to the contoured metal hot pressing head, a high-temperature resistant release paper is also provided between the hot pressing mold 82 and the paper-plastic cup lid. The specific installation structure is as follows: a release paper roll 83 is set on each side of the carrier transfer line 20, and the high-temperature resistant release paper crosses the carrier from the release paper roll 83 on one side and wraps around the release paper roll 83 on the other side. Tensioning levers 84 are provided on the lower sides of the two release paper rolls 83. When no force is applied, the high-temperature release paper between the two release paper rolls 83 is kept under tension by the two tensioning levers 84. When the conforming metal hot press head 821 presses down, the tensioning levers 84 swing under the downward pressure, and the high-temperature release paper partially moves down and adheres to the paper-plastic cup lid, completing the hot pressing. After the hot pressing is completed, the conforming metal hot press head 821 is lifted away, and the tensioning levers 84 return to the initial position under the action of the return spring, tightening the high-temperature release paper between the two release paper rolls 83, generating a force to peel off from the filter screen. At the same time, the carrier applies a downward suction force to the filter screen on the paper-plastic cup lid, thereby realizing the peeling off of the paper-plastic cup lid.

[0035] The optical detection unit 9 includes an optical camera, which takes a picture and then uses an algorithm to detect whether the mesh on the cup lid is misaligned. This device is existing and will not be described in detail here.

[0036] The stacking unit 10 includes a gripping frame 101, a set of suction cups 102 disposed on the gripping frame 101, and a feeding conveyor belt 103. The feeding conveyor belt 103 is provided with a feeding guide rail 104 at its discharge end, and the feeding guide rail 104 is connected to the stacking frame 105 at its discharge end.

[0037] The system also includes an upper and lower lead screw module 106 that drives the gripping frame 101 to move up and down, a lateral lead screw module 107 that drives the upper and lower lead screw module 106 to move left and right, and a front and rear lead screw module 108 that drives the lateral lead screw module 107 to move back and forth. Under the action of the upper and lower lead screw module 106, the lateral lead screw module 107, and the front and rear lead screw module 108, the gripping frame 101 moves up, down, left, right, and back and forth, facilitating the accurate gripping of the paper-plastic cup lids detected by the optical detection unit 9 via the suction cup 102 and transferring them to the unloading conveyor belt 103. Simultaneously, during the transfer process, the suction cup 102, which handles unqualified paper-plastic cup lids, is de-aired to release the negative pressure adsorption, causing the unqualified paper-plastic cup lids to fall outside the unloading conveyor belt 103.

[0038] The feeding conveyor belt 103 is equipped with a set of guide strips 1031 adapted to the number of columns of the carrier 100. The feeding guide rail 104 corresponds to the guide strips 1031, so that the paper and plastic cup lids on the feeding conveyor belt 103 accurately enter the feeding guide rail 104. The stacking rack 105 is located below the feeding guide rail 104, and the upper edge of the feeding guide rail 104 is provided with a flange 1041 that folds inward to the inside of the guide rail. The entire feeding guide rail 104 has an arc-shaped structure. A pushing cylinder 109 is provided at the bottom of the feeding guide rail 104. The feeding guide rail 104 is provided with a clearance hole adapted to the pushing cylinder 109. The pushing cylinder 109 pushes the sliding paper and plastic cup lids away from the feeding guide rail 104 and into the stacking rack 105.

[0039] The present invention has been described above by way of example with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any non-substantial improvements made using the inventive concept and technical solution of the present invention; or the direct application of the inventive concept and technical solution to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A paper-plastic cup lid coating production line, characterized in that: The system includes a punching unit, an adjustment unit, a vision inspection unit, an arrangement unit, a cup lid adjustment unit, an adhesive coating unit, a film coating unit, a hot pressing unit, an optical inspection unit, and a stacking unit connected in sequence. The punching unit punches the integrally formed paper-plastic cup lid into individual paper-plastic cup lids. The adjustment unit adjusts the punched paper-plastic cup lids into a single row for forward conveying. The vision inspection unit inspects each paper-plastic cup lid and rejects defective products. The arrangement unit arranges the paper-plastic cup lids into multiple rows. The cup lid adjustment unit adjusts the orientation of the cup lid to ensure that the drinking spout of the paper-plastic cup lid maintains a consistent orientation. The gluing unit applies glue to the drinking spout of the paper-plastic cup lid; the film-coating unit cuts the continuous mesh belt and then attaches the cut filter screen to the drinking spout of the paper-plastic cup lid; the hot-pressing unit hot-presses the filter screen to the drinking spout; the optical detection unit detects the paper-plastic cup lid and screens out products with unqualified filter screens; the stacking unit completes the counting and stacking of the paper-plastic cup lids.

2. The paper-plastic cup lid coating production line according to claim 1, characterized in that: The arrangement unit includes an arrangement workbench, on which are arranged partition ribs along the conveying direction of the paper-plastic cup lids. A set of arrangement channels are formed between two adjacent partition ribs and between the outermost partition rib and the side of the workbench. The arrangement workbench is also equipped with an air blowing device to blow the paper-plastic cup lids into each arrangement channel.

3. The paper-plastic cup lid coating production line according to claim 1, characterized in that: The cup lid adjustment unit includes a cup lid adjustment worktable, a carrier conveyor belt set on the cup lid adjustment worktable, and a movable plate that can move up, down, left, right, forward and backward on the cup lid adjustment worktable. A set of cameras is set at the front end of the movable plate for taking pictures of the paper-plastic cup lid to determine the drinking position of the paper-plastic cup lid. Behind the cameras are multiple rows of independently controlled adjustment motors, and a negative pressure suction rod for adsorbing the paper-plastic cup lid is set on the output shaft of the adjustment motor.

4. The paper-plastic cup lid coating production line according to claim 1, characterized in that: The glue application unit includes a glue dispensing servo module, a glue injection bracket that can move up, down, left, right, forward, and backward on the glue dispensing servo module, and a row of glue applicators on the glue injection bracket.

5. The paper-plastic cup lid coating production line according to claim 4, characterized in that: The applicator uses a syringe dispensing head or a conformal sponge pressing head.

6. The paper-plastic cup lid coating production line according to claim 1, characterized in that: The coating unit is equipped with a coating machine, which includes a filter screen cutting device and a filter screen attaching device. The filter screen cutting device includes a feed roll and a take-up roll, and a set of cutting blades disposed between the feed roll and the take-up roll. The filter screen attaching device includes a movable plate that can move left and right, and a set of gripping cylinders that move up and down on the movable plate. The movable end of the gripping cylinders is fixedly equipped with a negative pressure gripping head.

7. The paper-plastic cup lid coating production line according to claim 1, characterized in that: The hot pressing unit includes a lower support platform that can move up and down to support the vehicle, a set of hot pressing molds that can move up and down and are located directly above the lower support platform, and a high-temperature resistant release paper is also provided between the lower support platform and the hot pressing molds.

8. The paper-plastic cup lid coating production line according to claim 2, characterized in that: The stacking unit includes a gripping frame that can move up, down, left, right, forward, and backward; a set of suction cups set on the gripping frame; a feeding conveyor belt; a feeding guide rail at the discharge end of the feeding conveyor belt; and a stacking frame connected to the discharge end of the feeding guide rail.

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