Humidity-adjustable packaging box gluing equipment and gluing process

Abstract

The present application relates to the field of gluing, and discloses a humidity-adjustable packaging box gluing device and gluing process, which comprises a gluing assembly, the gluing assembly comprises a glue box, one side of the glue box is provided with a gluing roller, a conveying roller and a distance sensor are arranged directly below the gluing roller, an inclined downward slow-flow block is arranged in the glue box, a scraper is horizontally arranged on the bottom of the glue box near one side of the gluing roller, the scraper and the gluing roller have a set distance, a liquid outlet pipe is arranged on one side of the glue box, a liquid inlet pipe is arranged above the glue box, a plurality of guide plates are arranged on the scraper, the guide plates are triangular, and the plurality of guide plates are inclined to one side of the liquid outlet pipe, a humidifier is further arranged on one side of the gluing assembly, and a detection assembly for detecting the curing state of the white latex is arranged on the glue box. The present application can automatically adjust the humidity according to the curing state of the white latex on the surface of the gluing roller.

Description

Technical Field

[0001] This invention relates to the field of adhesive coating technology, and in particular to a humidity-adjustable packaging box adhesive coating equipment and coating process. Background Technology

[0002] During the production of packaging boxes, different colored and patterned packaging sheets are often pasted on for aesthetic purposes. Therefore, before pasting the packaging sheets, adhesive needs to be applied to the surface. Currently, roller coating machines are used in production to apply white glue to the surface of the packaging sheets. After the coating roller rotates and applies glue to one side of the packaging sheet, most of the glue adheres to the sheet due to its porous surface, resulting in less glue residue on the coating roller and a thinner glue layer. Since white glue cures easily, this thinner glue layer solidifies more readily due to moisture evaporation, leaving solid white glue residue on the coating roller surface. This causes the outer diameter of the coating roller to increase, reducing the distance between it and the glue tank and the packaging sheet, leading to reduced glue application and paper jams. Therefore, a humidifier is needed to keep the coating roller moist during the packaging sheet gluing process. However, humidifiers produce water mist when humidifying. If an industrial camera is used to observe the curing of the glue on the coating roller, the water mist will interfere with the camera, making it difficult to accurately capture the condition of the coating roller surface. Therefore, how to determine the curing condition of white glue has become a challenge.

[0003] Besides moisturizing, during the operation of a roller coating machine, to prevent the white glue from curing in the glue box, a glue circulation structure is usually used. This involves pumping glue from the glue bucket to the glue box, and then pumping glue from the glue box back to the glue bucket, maintaining a dynamic equilibrium of glue in the box. However, due to the high viscosity of white glue, if the circulation pump is powerful enough, the white glue level drops too quickly at the extraction point, leaving insufficient flow to replenish the lost level. This uneven glue level in the box affects the thickness of the glue layer on the coating roller surface and can even lead to glue breakage in severe cases. Conversely, if the circulation pump is weak, the glue circulation speed in the box is too low, easily causing the glue layer to peel or even cure, rendering the circulation function ineffective. Therefore, it is necessary to improve the flowability of the white glue in the box, preventing both peeling and curing while also avoiding significant deviations in the glue level.

[0004] Meanwhile, due to its high viscosity, air bubbles generated during the circulation of white glue are difficult to escape. These bubbles rise slowly within the glue and do not quickly reach the surface. Some small bubbles may even remain suspended in the glue. If these bubbles transfer to the coating roller, they will burst during the coating of the paper, creating voids and missing glue on the paper surface. If these missing glue locations are precisely at the edges or corners of the paper, quality issues such as curling edges and corners will occur after the paper and packaging box are glued together. Therefore, timely removal of air bubbles from the white glue during application is a problem that urgently needs to be addressed. Summary of the Invention

[0005] The purpose of this invention is to provide a humidity-adjustable packaging box coating equipment and coating process, which aims to solve the problems of poor flowability and difficulty in removing air bubbles in the existing technology of white glue.

[0006] The above-mentioned technical objective of the present invention is achieved through the following technical solution: a humidity-adjustable packaging box gluing device, comprising a gluing assembly, the gluing assembly including a glue box, a gluing roller disposed on one side of the glue box, a conveying roller and a distance sensor disposed directly below the gluing roller, a downwardly inclined slow-flow block disposed inside the glue box, a scraper horizontally disposed on the bottom of the glue box near the gluing roller, the scraper being at a predetermined distance from the gluing roller, a liquid outlet pipe disposed on one side of the glue box, a liquid inlet pipe disposed above the glue box, multiple guide plates disposed on the scraper, the guide plates being triangular in shape, and the multiple guide plates being inclined toward the liquid outlet pipe, a humidifier disposed on one side of the gluing assembly, and a detection component for detecting the curing state of white glue disposed on the glue box.

[0007] Through the above technical solution, white glue enters the glue box through the inlet pipe and falls onto the flow buffer. It then flows downwards along the flow buffer to above the scraper. Since the white glue flows from a high point to a low point, it has a certain flow velocity. After flowing onto the scraper, the white glue flows towards the outlet pipe under the action of the guide plate. When the glue above the scraper reaches a certain level, the coating roller starts to rotate, transferring the glue to above it. The scraper then scrapes the glue to the set thickness. Because the glue is still flowing, it creates friction with the coating roller. If the glue... The adhesive contains air bubbles, which are burst under horizontal shear force and do not adhere to the surface of the coating roller. The rotating coating roller presses the white glue onto the surface of the packaging paper. At the same time, because the white glue is in a flowing state inside the glue box, the circulation speed of the white glue in the entire system is accelerated, preventing the white glue from solidifying and clumping inside the glue box. The detection component monitors the glue on the surface of the coating roller in real time. If the glue is detected to be solidified, an electrical signal is transmitted to the humidifier. The humidifier increases its power to humidify the surface of the metal roller, preventing the glue from solidifying further.

[0008] It should be understood that the structure for drawing glue from the glue box into the liquid inlet pipe and then into the liquid inlet pipe generally uses existing structures such as circulating pumps and glue storage tanks, which will not be elaborated on here.

[0009] A further configuration of the present invention is as follows: the detection component includes a rotating rod disposed on the glue box, the length direction of the rotating rod being parallel to the axis of the glue coating roller, a contact needle disposed on the rotating rod, an industrial camera disposed above the contact needle, a first motor disposed at one end of the rotating rod, the contact needle being perpendicular to the rotating rod, two cleaning rollers disposed on one side of the rotating rod, the two cleaning rollers being spaced apart by a predetermined distance, and the cleaning rollers being covered with elastic rubber.

[0010] Through the above technical solution, after the distance sensor detects that the packaging paper has been coated, the rotation speed of the coating roller is calculated. When the area where the coating roller contacts the packaging paper rotates to the vicinity of the detection component, the first motor controls the rotating rod to rotate. The rotating rod drives the contact pin to rotate, and the end of the contact pin contacts the surface of the coating roller. If the white glue has not cured, a glue string will be formed between the contact pin and the surface of the coating roller. If the white glue has begun to cure, the glue string length will be significantly shorter or even no glue string will be generated. The industrial camera judges the curing status of the glue on the surface of the coating roller based on the stringing situation, and adjusts the humidification power of the humidifier accordingly. It is simple and convenient. After the contact pin has completed the detection, it rotates between two cleaning rollers. Under the action of friction, the two cleaning rollers rotate to wipe away the glue on the surface of the contact pin. Then the first motor controls the contact pin to reset.

[0011] A further embodiment of the present invention is that the detection component includes a laser receiver disposed on the glue box, the middle part of the glue coating roller is transparent, a mounting rod is horizontally disposed inside the glue coating roller, the mounting rod is coaxially disposed with the glue coating roller, and a laser emitter is disposed on the mounting rod.

[0012] With the above technical solution, the coating roller rotates while the mounting rod does not. When the area of ​​the coating roller in contact with the packaging paper rotates to the vicinity of the detection component, the laser emitter emits a laser that passes through the transparent part of the coating roller and is received by the laser receiver. When the scraper scrapes the glue on the surface of the coating roller to a certain thickness, the glue layer is very thin and has a high light transmittance. When the coating roller presses the glue onto the packaging paper, the glue layer on the coating roller appears frosted glass-like due to the gaps on the surface of the packaging paper, which greatly affects the laser transmittance. When the white glue begins to cure, the resin molecular chains begin to form a network structure, and the light transmittance of the glue layer increases again, thus increasing the laser transmittance. Therefore, the laser can be received by the laser receiver, and the strength of the signal received by the laser receiver can be used to determine the glue curing status, thereby controlling the humidification power of the humidifier.

[0013] A further configuration of the present invention is as follows: a pressing block is disposed below the flow-retarding block, a leveling block is disposed below the pressing block, the scraper is located between the pressing block and the leveling block, and the side surface of the flow-retarding block, the top and side surfaces of the pressing block, and the top surface of the scraper form a stepped structure.

[0014] Through the above technical solution, the clamping block and the leveling block clamp the scraper to prevent the scraper from vibrating when scraping glue, which would affect the uniformity of the glue layer on the surface of the coating roller. At the same time, the white glue falls onto the slow-flow block, spreads out and flows downward. At this time, the larger air bubbles burst on the slow-flow block, and then the glue flows from the slow-flow block to the top of the clamping block, and then flows down from the top of the clamping block to the top of the scraper, forming a stepped slow-flow effect. The air bubbles inside the white glue will overflow during the flow, reducing some of the air bubbles.

[0015] A further provision of the present invention is that: a guide hole and an adjusting threaded hole are provided on the side of the glue box away from the glue coating roller; a guide rod that cooperates with the guide hole is provided on the clamping block; a limit groove is provided on the clamping block; an adjusting bolt is provided through the adjusting threaded hole; a limit plate is provided at the end of the adjusting bolt; and the limit plate is located in the limit groove.

[0016] The above technical solution allows for direct control of the distance between the scraper and the coating roller by rotating the adjusting bolt, thereby controlling the thickness of the adhesive layer on the coating roller surface. This method is simple and convenient.

[0017] A further feature of the present invention is that the humidifier includes a humidifying tube, the humidifying tube is inclined upward, the end of the humidifying tube near the coating roller is closed, and a plurality of humidifying holes are provided on the humidifying tube, the humidifying holes being directly opposite the coating roller.

[0018] With the above technical solution, the water mist generated by the humidifier is sprayed onto the surface of the coating roller through the humidification pipe and humidification hole for humidification. If the small droplets in the water mist gather into large droplets in the humidification pipe, the large droplets will fall back down along the inclined humidification pipe after they gather into a water flow, preventing the large droplets and water flow from falling onto the coating roller and the packaging paper.

[0019] A further feature of the present invention is that a water-blocking ring is provided around the humidification hole, and the water-blocking ring is located inside the humidification pipe.

[0020] With the above technical solution, large droplets and water flow will be blocked by the water-blocking ring when they reach the vicinity of the humidification hole, thus bypassing the humidification hole and flowing back, further preventing large droplets and water flow from falling onto the coating roller and packaging paper.

[0021] A humidity-adjustable adhesive coating process for packaging boxes includes the following steps:

[0022] S1. Inject white glue into the glue box through the liquid inlet pipe, set the speed of the coating roller, and rotate the coating roller and the conveyor roller synchronously. A layer of white glue gradually adheres to the coating roller.

[0023] S2. The packaging paper is fed from one side of the coating roller to between the coating roller and the conveyor roller. The coating roller presses the glue onto the packaging paper, and the packaging paper covers the distance sensor. At this time, the distance sensor receives the first signal.

[0024] S3. When the packaging paper is coated between the coating roller and the conveyor roller and is conveyed to the other side of the coating roller, the packaging paper no longer covers the distance sensor. At this time, the distance sensor receives a second signal.

[0025] S4. When the distance sensor receives the second signal, the time it takes for the area of ​​the glue-applying roller in contact with the packaging paper to rotate to the side of the detection component is calculated based on the rotation speed of the glue-applying roller.

[0026] S5. When the area on the glue-coating roller that is in contact with the packaging paper moves to one side of the detection component, the detection component starts to work and performs white glue curing detection on the area in contact with the packaging paper in S2.

[0027] S6. Based on the test results of S5, if the white glue on the coating roller has cured, the humidifier will increase its humidification power; if the white glue on the coating roller has not cured, the humidification power will remain unchanged.

[0028] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0029] 1. By setting up a flow-slowing block and a flow guide plate, the white glue flows from a high place to a low place along the flow-slowing block. At this time, it has a certain flow rate. After flowing onto the scraper, it flows towards the side of the liquid outlet pipe under the action of the flow guide plate, which accelerates the circulation speed of the glue in the glue box.

[0030] 2. The glue near the scraper is in a flowing state, and the glue and the coating roller form a certain friction. If the glue contains air bubbles, the air bubbles will be squeezed out under the action of horizontal shear force and will not adhere to the surface of the coating roller.

[0031] 3. This invention uses a distance sensor and a detection component. The distance sensor determines whether the packaging paper has been coated. Combined with the rotation speed of the coating roller, the time it takes for the area of ​​the coating roller in contact with the packaging paper to move to the vicinity of the detection component is calculated. The detection component detects the curing status of the glue on the surface of the coating roller. The power of the humidifier is then adjusted based on the detection results, resulting in a higher degree of automation. Attached Figure Description

[0032] To more clearly illustrate the technical solutions in the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0033] Figure 1 This is a schematic diagram of the overall structure of Embodiment 1 of the present invention;

[0034] Figure 2 This is a schematic diagram of the structure from another perspective in Embodiment 1 of the present invention;

[0035] Figure 3 This is a schematic diagram showing the positions of the glue box and the glue roller in Embodiment 1 of the present invention;

[0036] Figure 4 yes Figure 3 Enlarged view of section A;

[0037] Figure 5 This is a schematic diagram of the scraper and guide plate in Embodiment 1 of the present invention;

[0038] Figure 6 This is an exploded structural diagram of the flow-retarding block, pressing block, scraper, and leveling block in Embodiment 1 of the present invention;

[0039] Figure 7 This is a schematic diagram of the humidification tube in Embodiment 1 of the present invention;

[0040] Figure 8 This is a schematic diagram of the detection component in Embodiment 1 of the present invention;

[0041] Figure 9 This is a schematic diagram of the detection component in Embodiment 2 of the present invention.

[0042] Figure descriptions: 1. Glue application assembly; 1a. Glue box; 1a1. Guide hole; 1a2. Adjustment threaded hole; 1b. Glue application roller; 1c. Flow buffer; 1d. Scraper; 1d1. Guide plate; 2. Conveyor roller; 3. Distance sensor; 4. Liquid outlet pipe; 5. Liquid inlet pipe;

[0043] 6. Humidifier; 6a. Humidification tube; 6a1. Humidification hole; 6a2. Water-retaining ring;

[0044] 7. Rotating rod; 7a. Contact needle; 7b. Industrial camera; 7c. First motor; 7d. Cleaning roller;

[0045] 8. Mounting rod; 8a. Laser receiver; 8b. Laser emitter;

[0046] 9. Clamping block; 9a. Limiting groove; 10. Leveling block; 11. Guide rod; 12. Adjusting bolt; 12a. Limiting plate. Detailed Implementation

[0047] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are merely some, not all, of the embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0048] Example 1:

[0049] This invention provides a humidity-adjustable packaging box gluing device and gluing process, such as... Figure 1 As shown, it includes a glue application assembly 1, which includes a glue box 1a, a liquid outlet pipe 4 on one side of the glue box 1a, a liquid inlet pipe 5 on the top of the glue box 1a, and a glue application roller 1b on one side of the glue box 1a.

[0050] like Figure 2 As shown, a conveyor roller 2 and a distance sensor 3 are located directly below the glue-applying roller 1b.

[0051] like Figures 3 to 5 As shown, a downward-sloping flow buffer block 1c is provided inside the glue box 1a. A scraper 1d is horizontally arranged on the bottom of the glue box 1a near the glue coating roller 1b. There is a set distance between the scraper 1d and the glue coating roller 1b, which needs to be set according to the viscosity of the glue and the required thickness of the glue coating. Multiple guide plates 1d1 are provided on the scraper 1d. The guide plates 1d1 are triangular and are inclined towards the liquid outlet pipe 4.

[0052] like Figure 4 and Figure 6 As shown, a pressing block 9 is provided below the flow-retarding block 1c, and a leveling block 10 is provided below the pressing block 9. The scraper 1d is located between the pressing block 9 and the leveling block 10. The side of the flow-retarding block 1c, the top and side surfaces of the pressing block 9, and the top surface of the scraper 1d form a stepped structure.

[0053] like Figure 6 As shown, the glue box 1a has a guide hole 1a1 and an adjusting threaded hole 1a2 on the side away from the glue roller 1b. The clamping block 9 has a guide rod 11 that cooperates with the guide hole 1a1. The clamping block 9 has a limit groove 9a. An adjusting bolt 12 is provided through the adjusting threaded hole 1a2. The end of the adjusting bolt 12 has a limit plate 12a. The limit plate 12a is located in the limit groove 9a and can rotate in the limit groove 9a.

[0054] like Figure 1 and Figure 7As shown, a humidifier 6 is also provided on one side of the coating assembly 1. The humidification principle is that the high-frequency ceramic oscillator commonly used in the prior art vibrates water droplets into water mist. A humidification tube 6a is installed on the humidifier 6. The water mist is sent into the humidification tube 6a by a fan. The humidification tube 6a is tilted upward. The end of the humidification tube 6a away from the body of the humidifier 6 is closed. Several humidification holes 6a1 are opened on the humidification tube 6a. The humidification holes 6a1 are directly opposite the coating roller 1b. A water-blocking ring 6a2 is provided around the humidification hole 6a1. The water-blocking ring 6a2 is located inside the humidification tube 6a. The water mist falls onto the surface of the coating roller 1b through the humidification hole 6a1 for humidification. When the small water droplets in the humidification tube 6a gather into large particles and water flow, the water flow flows back into the body of the humidifier 6 along the humidification tube 6a, bypassing the humidification hole 6a1.

[0055] like Figure 8 As shown, a detection component for detecting the curing state of white glue is provided on the glue box 1a. The detection component includes a rotating rod 7 set on the glue box 1a. The length direction of the rotating rod 7 is parallel to the axis of the glue coating roller 1b. A contact needle 7a is provided on the rotating rod 7. An industrial camera 7b is provided above the contact needle 7a. A first motor 7c is provided at one end of the rotating rod 7. The contact needle 7a is perpendicular to the rotating rod 7. Two cleaning rollers 7d are provided on one side of the rotating rod 7. The two cleaning rollers 7d have a set distance between them. The cleaning rollers 7d are covered with elastic rubber.

[0056] The workflow and working principle of this embodiment are as follows:

[0057] First, tighten the adjusting bolt 12 to make the scraper 1d fit against the surface of the glue roller 1b. Then, use a circulating pump to pump the white glue in the glue bucket into the liquid inlet pipe. The glue flows from the liquid inlet pipe onto the slow flow block 1c. The glue spreads out in a thin layer on the slow flow block 1c. At this time, the large air bubbles generated when the glue is extracted directly overflow. Then the glue flows down from the slow flow block 1c, flows from the side of the slow flow block 1c to the top of the pressing block 9, and then flows from the side of the pressing block 9 to the top of the scraper 1d. At this time, the glue is still in a thin layer state, and the air bubbles in the glue will further overflow and be removed. Since the glue is in contact with the guide plate 1d1, and since the glue has a certain flow rate at this time, under the action of the guide plate 1d1, it presents a liquid flow towards the liquid inlet pipe 5. At this point, the inlet speed is controlled to be greater than the outlet speed, and the white glue forms a certain liquid level above the scraper 1d. After the liquid level reaches a certain height, the inlet speed is adjusted to be equal to the outlet speed, and the white glue enters the glue tank through the outlet pipe 4. The white glue in the glue tank is then drawn into the inlet pipe 5, and the white glue in the whole system reaches a dynamic balance, preventing the white glue from curing. Since the glue forms a liquid flow in the glue box 1a, the circulation speed of the whole system also increases, effectively preventing the glue from curing in the glue box 1a.

[0058] Then the coating roller 1b and the conveyor roller 2 start to rotate. In order to ensure that the coating roller 1b and the conveyor roller 2 rotate synchronously in opposite directions and have the same angular velocity, the gear on the coating roller 1b can be driven by a motor to rotate, and then the gear on the coating roller 1b can drive the gear on the conveyor roller 2 to rotate, so as to achieve the effect of synchronous reverse rotation. At this time, the surface of the coating roller 1b is in contact with the glue above the scraper 1d. The glue adheres to the surface of the coating roller 1b. As the coating roller 1b rotates, the scraper 1d scrapes the glue on the surface of the coating roller 1b into a thin glue layer. The thickness of the glue layer can be further adjusted by turning the adjusting bolt 12 to adjust the distance between the scraper 1d and the surface of the coating roller 1b. Since the glue flows towards the glue outlet pipe, the flow direction is the axial direction of the coating roller 1b. However, when the scraper 1d scrapes the glue onto the surface of the coating roller 1b, the glue is subjected to a force in the tangential direction of the surface of the coating roller 1b. Therefore, the force generated in the direction of the flow is perpendicular to the force generated by the scraper 1d and the coating roller 1b on the glue. A shearing force is formed between the two forces, which bursts the air bubbles attached to the surface of the coating roller 1b, preventing the air bubbles from creating void defects on the surface of the packaging paper.

[0059] Then, a conveyor belt or similar mechanism is used to feed the packaging paper between the conveyor roller 2 and the glue-applying roller 1b. The glue-applying roller 1b and the conveyor roller 2 rotate synchronously in opposite directions, conveying the packaging paper from one side of the conveyor belt to the other side. When the packaging paper passes directly under the glue-applying roller 1b, the glue-applying roller 1b presses its surface glue onto the surface of the packaging paper. The outer diameter of the glue-applying roller 1b is significantly larger than the length of the packaging paper, and only one area of ​​the surface of the glue-applying roller 1b is in contact with the packaging paper. The glue layer on the area of ​​the glue-applying roller 1b that is in contact with the packaging paper (i.e., the contact area) thins rapidly. The glue layer on other areas of the surface of the glue-applying roller 1b is thinner than the glue layer on the contact area, so it is only necessary to check the curing status of the glue in the contact area.

[0060] When the distance sensor 3 is covered by the packaging paper, it receives the first electrical signal when it senses the packaging paper entering between the coating roller 1b and the conveyor roller 2. When the packaging paper is coated and detaches from between the coating roller 1b and the conveyor roller 2, the distance sensor 3 is no longer covered by the packaging paper and receives the second electrical signal. By using the time interval between the two electrical signals and the rotation speed of the coating roller 1b, the length of the packaging paper and the length of the contact area can be calculated. At the same time, the time it takes for the contact area to move to the vicinity of the detection component can also be calculated.

[0061] When the contact area moves to the vicinity of the contact needle 7a, the first motor 7c controls the contact needle 7a to rotate. The end of the contact needle 7a contacts the surface of the contact area and then quickly separates. If the glue has not cured at this time, a certain length of glue string will be formed between the contact needle 7a and the contact area. If the glue begins to cure and its fluidity is insufficient, the length of the glue string will quickly shorten or even no string will be formed. The glue stringing situation is photographed by the industrial camera 7b. If the glue begins to cure, the humidifier 6 is controlled by an electrical signal to increase the humidification power and slow down the curing speed of the glue.

[0062] A humidity-adjustable adhesive coating process for packaging boxes includes the following steps:

[0063] S1. White glue is injected into glue box 1a through liquid inlet pipe 5. The rotation speed of coating roller 1b is set. Coating roller 1b and conveyor roller 2 rotate synchronously. A layer of white glue gradually adheres to coating roller 1b.

[0064] S2. The packaging paper is conveyed from one side of the glue coating roller 1b to between the glue coating roller 1b and the conveyor roller 2. The glue coating roller 1b presses the glue onto the packaging paper. The packaging paper covers the distance sensor 3. At this time, the distance sensor 3 receives the first signal.

[0065] S3. When the packaging paper is coated between the coating roller 1b and the conveying roller 2 and is conveyed to the other side of the coating roller 1b, the packaging paper no longer covers the distance sensor 3. At this time, the distance sensor 3 receives a second signal.

[0066] S4. When the distance sensor 3 receives the second signal, the time it takes for the area of ​​the glue-applying roller 1b in contact with the packaging paper to rotate to the side of the detection component is calculated based on the rotation speed of the glue-applying roller 1b.

[0067] S5. When the area on the coating roller 1b that is in contact with the packaging paper moves to one side of the detection component, the detection component starts to work and performs white glue curing detection on the area in contact with the packaging paper in S2.

[0068] S6. Based on the test results of S5, if the white glue on the coating roller 1b has cured, the humidifier 6 will start to increase the humidification power; if the white glue on the coating roller 1b has not cured, the humidification power will remain unchanged.

[0069] Example 2:

[0070] The structure differs from that of Embodiment 1 in that, as Figure 9As shown, the detection assembly includes a laser receiver 8a disposed on the glue box 1a, a transparent part in the middle of the glue coating roller 1b, the transparent part being annular and coaxial with the glue coating roller 1b, a mounting rod 8 horizontally disposed inside the glue coating roller 1b, the mounting rod 8 being coaxial with the glue coating roller 1b, and a laser emitter 8b disposed on the mounting rod 8. When the glue coating roller 1b rotates, the mounting rod 8 does not rotate.

[0071] The difference in working principle compared to Embodiment 1 lies in the method for detecting the curing status of the adhesive in the contact area. The coating roller 1b rotates while the mounting rod 8 remains stationary. When the area of ​​the coating roller 1b in contact with the packaging paper rotates to the vicinity of the detection component, the laser emitter 8b emits a laser beam that passes through the transparent portion of the coating roller 1b and is received by the laser receiver 8a. When the scraper 1d scrapes the adhesive on the surface of the coating roller 1b to a certain thickness, the adhesive layer is very thin, resulting in high light transmittance. When the coating roller 1b presses the adhesive onto the packaging paper, due to the gaps on the surface of the packaging paper, the coating... The adhesive layer in the coated area on the adhesive roller 1b has a frosted glass appearance, which greatly reduces the transmittance of the laser. When the white glue begins to cure, the resin molecular chains begin to form a network structure, and the adhesive layer becomes transparent again. The transmittance of the adhesive layer will gradually recover. Therefore, the laser can be received by the laser receiver 8a. The curing status of the glue can be judged by the strength of the signal received by the laser receiver 8a. If the received signal is strong, it proves that the adhesive layer has begun to cure and the humidification power needs to be increased. If the received signal is weak, it proves that the adhesive layer is still in a frosted glass state and has not cured, so there is no need to increase the humidification power.

[0072] It should be noted that the various embodiments in this specification are described in a progressive manner, with each embodiment focusing on the differences from other embodiments. The same or similar parts between the various embodiments can be referred to each other.

[0073] The above description is merely a description of preferred embodiments of the present invention and is not intended to limit the scope of the present invention in any way. Any changes or modifications made by those skilled in the art based on the above disclosure shall fall within the protection scope of the claims.

Claims

1. A humidity-adjustable packaging box gluing device, characterized by: The application relates to a rubber coating assembly (1) which comprises a rubber box (1a) provided with a rubber coating roller (1b) on one side, a conveying roller (2) and a distance sensor (3) arranged below the rubber coating roller (1b), an inclined downward slow-flow block (1c) arranged in the rubber box (1a), a scraper (1d) horizontally arranged on the bottom of the rubber box (1a) and close to one side of the rubber coating roller (1b), a set distance between the scraper (1d) and the rubber coating roller (1b), a liquid outlet pipe (4) arranged on one side of the rubber box (1a), a liquid inlet pipe (5) arranged above the rubber box (1a), a plurality of flow guide plates (1d1) arranged on the scraper (1d), the flow guide plates (1d1) being triangular, and the plurality of flow guide plates (1d1) being arranged obliquely to one side of the liquid outlet pipe (4), a humidifier (6) arranged on one side of the rubber coating assembly (1), and a detection assembly for detecting the curing state of white latex arranged on the rubber box (1a).

2. The equipment for gluing the humidity-adjustable packaging box according to claim 1, characterized in that: The detection assembly comprises a rotating rod (7) arranged on the rubber box (1a), the length direction of the rotating rod (7) is parallel to the axis of the rubber coating roller (1b), a contact pin (7a) is arranged on the rotating rod (7), an industrial camera (7b) is arranged above the contact pin (7a), a first motor (7c) is arranged at one end of the rotating rod (7), the contact pin (7a) is perpendicular to the rotating rod (7), two cleaning rollers (7d) are arranged on one side of the rotating rod (7), a set distance is arranged between the two cleaning rollers (7d), and elastic rubber is coated on the cleaning rollers (7d).

3. The equipment for gluing the humidity-adjustable packaging box according to claim 1, characterized in that: The detection assembly comprises a laser receiver (8a) arranged on the rubber box (1a), the middle part of the rubber coating roller (1b) is transparent, a mounting rod (8) is horizontally arranged in the rubber coating roller (1b), the mounting rod (8) is coaxially arranged with the rubber coating roller (1b), and a laser emitter (8b) is arranged on the mounting rod (8).

4. The equipment for gluing the humidity-adjustable packaging box according to claim 1, characterized in that: A pressing block (9) is arranged below the slow-flow block (1c), a pad block (10) is arranged below the pressing block (9), the scraper (1d) is located between the pressing block (9) and the pad block (10), and the side surface of the slow-flow block (1c), the top surface and side surface of the pressing block (9), and the top surface of the scraper (1d) form a stepped structure.

5. The humidity-adjustable packaging box gluing device according to claim 4, characterized in that: A guide hole (1a1) and an adjusting threaded hole (1a2) are arranged on one side of the rubber box (1a) away from the rubber coating roller (1b), a guide rod (11) matched with the guide hole (1a1) is arranged on the pressing block (9), a limiting groove (9a) is arranged on the pressing block (9), an adjusting bolt (12) passes through the adjusting threaded hole (1a2), a limiting plate (12a) is arranged at the end of the adjusting bolt (12), and the limiting plate (12a) is located in the limiting groove (9a).

6. The humidity-adjustable packaging box gluing device according to claim 1, characterized in that: The humidifier (6) comprises a humidifying pipe (6a) which is inclined upward, the humidifying pipe (6a) is closed at one end close to the glue roller (1b), a plurality of humidifying holes (6a1) are formed on the humidifying pipe (6a), and the humidifying holes (6a1) are opposite to the glue roller (1b).

7. The humidity-adjustable packaging box gluing device according to claim 6, characterized in that: A water retaining ring (6a2) is arranged at the periphery of the humidifying hole (6a1), and the water retaining ring (6a2) is located in the humidifying pipe (6a).

8. A process for applying glue to a product using the humidity-adjustable packaging box according to any one of claims 1 to 7, characterized in that, The method comprises the following steps: S1, injecting white latex into the glue box (1a) through the liquid inlet pipe (5), setting the rotating speed of the glue roller (1b), and rotating the glue roller (1b) and the conveying roller (2) synchronously, so that a layer of white latex is gradually adhered to the glue roller (1b); S2, conveying the packaging paper from one side of the glue roller (1b) to the position between the glue roller (1b) and the conveying roller (2), and the glue roller (1b) covers the glue on the packaging paper, so that the packaging paper covers the distance sensor (3), and the distance sensor (3) receives the first signal at this time; S3, when the packaging paper is conveyed to the other side of the glue roller (1b) after being coated between the glue roller (1b) and the conveying roller (2), the packaging paper no longer covers the distance sensor (3), and the distance sensor (3) receives the second signal at this time; S4, when the distance sensor (3) receives the second signal, the time when the area of the glue roller (1b) in contact with the packaging paper rotates to the side of the detection assembly is calculated according to the rotating speed of the glue roller (1b); S5, when the area of the glue roller (1b) in contact with the packaging paper rotates to the side of the detection assembly, the detection assembly starts to work, and the white latex solidification detection of the area in contact with the packaging paper in S2 is performed; S6, according to the detection result of S5, if the white latex on the glue roller (1b) has solidification, the humidifier (6) starts to increase the humidifying power, and if the white latex on the glue roller (1b) has no solidification, the humidifying power remains unchanged.

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