Corrugated board waterproof coating device

Abstract

The utility model discloses a corrugated board waterproof coating device which comprises a conveying belt and a coating mechanism, the coating mechanism is located above the conveying belt, a paperboard conveying channel is formed on the upper end face of the conveying belt, the coating mechanism comprises a fixing frame, a scraping plate, an installation box and a pipeline, the scraping plate is installed on the fixing frame, and a scraping piece is arranged at the lower end of the scraping plate. The mounting box is provided with a strip-shaped hole, the strip-shaped hole extends in the length direction of the mounting box, the mounting box is provided with a plurality of sprayers, the sprayers are arranged in the length direction of the mounting box, nozzles of the sprayers face the strip-shaped hole, the sprayers are connected with the pipeline, and the sprayers spray waterproof agents towards the upper end face of the paperboard. A waterproof agent is sprayed on a paperboard of the conveying belt through the spray head, and the waterproof agent is uniformly scraped by the scraper at the rear end through conveying of the conveying belt, so that watermarks generated after the paperboard is dried are effectively reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of cardboard production equipment, and more specifically, to a waterproof coating device for corrugated cardboard. Background Technology

[0002] In the existing technology, in order to achieve a certain degree of moisture and water resistance, corrugated cardboard is usually coated or coated with a cardboard waterproofing agent on its outer surface. The existing method of applying the waterproofing agent is to apply it by pressing a roller. However, it is difficult to control the amount of waterproofing agent on the roller surface. When applied to the cardboard, the cardboard absorbs water unevenly, resulting in watermarks left after the cardboard dries. Therefore, a technical solution is needed to solve the above problems. Utility Model Content

[0003] The purpose of this invention is to overcome the shortcomings of the prior art, make the waterproofing agent application more uniform, and provide a waterproof coating device for corrugated cardboard.

[0004] To achieve the above objectives, the present invention adopts the following technical solution:

[0005] This utility model discloses a waterproof coating device for corrugated cardboard, including a conveyor belt and a coating mechanism. The coating mechanism is located above the conveyor belt, and the upper end surface of the conveyor belt forms a channel for conveying cardboard. The coating mechanism includes a fixed frame, a scraper, a mounting box, and a pipe. The scraper is mounted on the fixed frame, and a scraper blade is provided at the lower end of the scraper. The scraper blade contacts the upper end surface of the cardboard. The mounting box has a strip-shaped hole that extends along the length of the mounting box. The mounting box is equipped with multiple nozzles that are arranged along the length of the mounting box. The nozzles face the strip-shaped hole, and the nozzles are connected to the pipe. The nozzles spray waterproofing agent onto the upper end surface of the cardboard.

[0006] Furthermore, the upper end of the scraper is rotatably mounted on the fixed frame, the scraper is inclined, the lower end of the scraper is inclined toward the conveying direction of the conveyor belt, the mounting box is provided with a connecting frame, and the connecting frame is rotatably mounted on the scraper.

[0007] Furthermore, the scraper includes a horizontal plate and two connecting plates, which are located at both ends of the horizontal plate. The upper end of the connecting plate is rotatably connected to the fixing frame. The connecting frame is located at the upper part of both ends of the mounting box and is rotatably connected to the inner side of the two connecting plates.

[0008] Furthermore, the scraper is mounted on the side of the horizontal plate facing the mounting box, and the scraper is elastically deformable.

[0009] Furthermore, the scraper is provided with a support plate, the support plate is arc-shaped, the support plate is provided with multiple locking teeth, the multiple locking teeth are arranged along the circumference of the support plate, and the fixing frame is equipped with gears corresponding to the locking teeth, the gears meshing with the locking teeth.

[0010] Furthermore, the nozzle is at least partially located within the mounting box, which is provided with an extension plate that surrounds the strip hole and extends toward the nozzle, with the lower end of the nozzle higher than the upper end of the extension plate.

[0011] Furthermore, the extension plate is inclined, with one end of the extension plate facing the nozzle tilted towards the center of the mounting box, and the opening size of the strip hole gradually increases from the inside to the outside.

[0012] Furthermore, the inner bottom surface of the mounting box is inclined along the length direction, the mounting box includes a lowest end, and the mounting box is provided with a collection hopper, which is located at the lowest end of the mounting box.

[0013] The beneficial effects of this utility model are:

[0014] 1. This utility model sprays a waterproofing agent onto the cardboard on a conveyor belt using a nozzle. The conveyor belt then spreads the waterproofing agent evenly using a scraper at the rear, effectively reducing watermarks that appear after the cardboard dries.

[0015] 2. This utility model features a strip-shaped hole at the bottom of the mounting box. This strip-shaped hole can restrict the water mist sprayed from the nozzle. The conveyor belt carries the cardboard at a uniform speed under the strip-shaped hole. The long strip of water mist can spray the cardboard evenly, resulting in a better spraying effect. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of one embodiment.

[0017] Figure 2 This is a schematic diagram of the coating mechanism in this embodiment.

[0018] Figure 3 This is a cross-sectional view of the mounting box in this embodiment.

[0019] Figure 4 This is a cross-sectional view of the mounting box from another direction in this embodiment.

[0020] Reference numerals: 1. Conveyor belt; 2. Coating mechanism; 21. Fixing frame; 211. Gear; 22. Scraper; 221. Scraper blade; 222. Horizontal plate; 223. Connecting plate; 2231. Gear; 224. Support plate; 23. Mounting box; 231. Slotted hole; 232. Connecting frame; 233. Extension plate; 234. Receiving groove; 235. Top plate; 236. Support ring; 237. Lowest end; 238. Collection hopper; 24. Pipe; 25. Nozzle; 3. Cardboard. Detailed Implementation

[0021] The technical solutions in this embodiment will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0022] like Figures 1-4 As shown, this embodiment discloses a waterproof coating device for corrugated cardboard boxes, including a conveyor belt 1 and a coating mechanism 2. The coating mechanism 2 is located above the conveyor belt 1, and the upper end surface of the conveyor belt 1 forms a channel for conveying cardboard 3. The coating mechanism 2 includes a fixed frame 21, a scraper 22, a mounting box 23, and a pipe 24. The scraper 22 is mounted on the fixed frame 21, and the fixed frame 21 is connected to an external frame.

[0023] The upper end of the scraper 22 is rotatably mounted on the fixed frame 21. The scraper 22 is inclined, and the lower end of the scraper 22 is inclined towards the conveying direction of the conveyor belt 1. The conveyor belt 1 conveys the cardboard 3 through the scraper 22. The lower end of the scraper 22 is provided with a scraper blade 221. The scraper blade 221 contacts the upper surface of the cardboard 3. The scraper blade 221 can smooth the waterproofing agent sprayed on the upper surface of the cardboard 3. Since the cardboard 3 is absorbent, the waterproofing agent will not be immediately absorbed by the cardboard 3 when it is sprayed on the upper surface of the cardboard 3. The part of the waterproofing agent that is sprayed in large quantities can be evenly scraped by the scraper blade 221. The scraper blade 221 is installed on the side of the horizontal plate 222 facing the mounting box 23. The scraper blade 221 can be elastically deformed. The scraper blade 221 is made of rubber or silicone material so that the force when the scraper blade 221 contacts the cardboard 3 is not too large, so as not to obstruct the conveying of the cardboard 3, and can scrape the waterproofing agent on the upper surface of the cardboard 3.

[0024] The scraper 22 includes a horizontal plate 222 and two connecting plates 223. The two connecting plates 223 are located at both ends of the horizontal plate 222. The upper end of the connecting plates 223 is rotatably connected to the fixed frame 21. The scraper 22 is provided with a support plate 224. The support plate 224 is arc-shaped and has multiple teeth 2231. The multiple teeth 2231 are arranged along the circumference of the support plate 224. The fixed frame 21 is equipped with gears 211 corresponding to the teeth 2231. The gears 211 mesh with the teeth 2231. By rotating the gears 211, the angle of the scraper 22 can be adjusted, and the distance between the scraper 221 and the upper surface of the conveyor belt 1 can be adjusted to adapt to different cardboard thicknesses 3.

[0025] The mounting box 23 is provided with a connecting frame 232, which is rotatably mounted on the scraper 22. The connecting frame 232 is located at the upper part of both ends of the mounting box 23 and is rotatably connected to the inner side of the two connecting plates 223. The connecting frame 232 suspends the mounting box 23 on the scraper 22. The mounting box 23 has a structure similar to a hanging basket, so that when the scraper 22 changes its tilt angle, the mounting box 23 still remains vertical, so that the nozzle 25 is vertically facing the upper surface of the cardboard 3.

[0026] The mounting box 23 has a strip-shaped hole 231 extending along the length of the mounting box 23. Multiple nozzles 25 are mounted on the mounting box 23, with at least a portion of each nozzle located inside the mounting box 23. The nozzles 25 are mounted on the top plate 235 of the mounting box 23. A support ring 236 is provided on the lower end face of the top plate 235, which limits and stabilizes the nozzles 25. The multiple nozzles 25 are arranged along the length of the mounting box 23, with their nozzles facing the strip-shaped hole 231. Each nozzle 25 is connected to a pipe 24, which is connected to an external water pump. The water pump is connected to a water tank containing waterproofing agent. The pipe 24 supplies water to each nozzle 25. The nozzles 25 spray waterproofing agent towards the upper surface of the cardboard 3. The strip-shaped hole 231 creates a strip-shaped restriction on the water mist sprayed from the nozzles 25. The conveyor belt 1 moves the cardboard 3 uniformly past the area below the strip-shaped hole 231, allowing for comprehensive spraying of the cardboard 3 through the long strip-shaped water mist, resulting in a better spraying effect.

[0027] like Figure 3 , Figure 4As shown, the mounting box 23 is provided with an extension plate 233, which surrounds the strip hole 231. A receiving groove 234 is formed between the extension plate 233 and the inner wall of the mounting box 23. The extension plate 233 extends toward the nozzle 25. The lower end of the nozzle 25 is higher than the upper end of the extension plate 233. The extension plate 233 can block part of the water mist generated by the nozzle 25 at the edge, making the water mist sprayed by the nozzle 25 more regular and changing the water mist sprayed from the nozzle from range 101 to range 102. The receiving groove 234 can collect the water mist that enters between the extension plate 233 and the inner wall of the mounting box 23. The inner bottom surface of the mounting box 23 is inclined along the length direction. The mounting box 23 includes a lowest end 237. The mounting box 23 is provided with a collection hopper 238, which is located at the lowest end 237 of the mounting box 23. The collection hopper 238 is connected to a water tank containing waterproofing agent through a connecting pipe. The water mist collected by the receiving groove 234 is collected and recycled.

[0028] like Figure 3 As shown, more preferably, the extension plate 233 is inclined, with one end of the extension plate 233 facing the nozzle 25 tilted towards the center of the mounting box 23. The opening size of the strip hole 231 gradually increases from the inside to the outside. The extension plate 233 tilts towards the center, making the opening of the strip hole 231 smaller as it gets closer to the nozzle 25. The water mist sprayed from the nozzle changes from range 101 to range 102. The water mist sprayed from the nozzle 25 contacts the inner side of the extension plate 233 and will not form water droplets on the outer side of the extension plate 233, causing the cardboard 3 to become too wet and affecting the spraying effect.

[0029] The above description is merely a preferred embodiment of this utility model. The protection scope of this utility model is not limited to the above embodiments. All technical solutions falling within the scope of this utility model's concept are protected. It should be noted that for those skilled in the art, any improvements and modifications made without departing from the principle of this utility model should also be considered within the protection scope of this utility model.

Claims

1. A corrugated paperboard waterproof coating apparatus characterized by, The application relates to a paperboard coating device, which comprises a conveying belt (1), a coating mechanism (2) located above the conveying belt (1), and a paperboard (3) conveying passage formed on the upper end surface of the conveying belt (1). The coating mechanism (2) comprises a fixing frame (21), a scraper (22), a mounting box (23) and a pipeline (24). The scraper (22) is installed on the fixing frame (21), and the lower end of the scraper (22) is provided with a scraping piece (221) which contacts the upper end surface of the paperboard (3). The mounting box (23) is provided with a strip-shaped hole (231) extending along the length direction of the mounting box (23). A plurality of nozzles (25) are installed on the mounting box (23) and arranged along the length direction of the mounting box (23). The nozzles (25) are connected with the pipeline (24) and spray waterproof agent towards the upper end surface of the paperboard (3).

2. A device for applying a water-resistant coating to corrugated paperboard as defined in claim 1, characterized in that The upper end of the scraper (22) is rotatably installed on the fixing frame (21), and the scraper (22) is obliquely arranged. The lower end of the scraper (22) is inclined towards the conveying direction of the conveying belt (1). The mounting box (23) is provided with a connecting frame (232) rotatably installed on the scraper (22).

3. A device for applying a water-resistant coating to corrugated paperboard as defined in claim 2, wherein The scraper (22) comprises a horizontal plate (222) and two connecting plates (223) located at the two ends of the horizontal plate (222). The upper end of the connecting plate (223) is rotatably connected with the fixing frame (21). The connecting frame (232) is located on the upper part of the two ends of the mounting box (23) and is rotatably connected with the inner sides of the two connecting plates (223).

4. A device for applying a water-resistant coating to corrugated paperboard as defined in claim 3, wherein The scraping piece (221) is installed on the side of the horizontal plate (222) facing the mounting box (23) and can be elastically deformed.

5. A device for applying a water-resistant coating to corrugated paperboard as defined in claim 1, wherein The scraper (22) is provided with a supporting plate (224) in the shape of a circular arc. The supporting plate (224) is provided with a plurality of clamping teeth (2231) arranged along the circumferential direction of the supporting plate (224). The fixing frame (21) is provided with a gear (211) corresponding to the clamping teeth (2231). The gear (211) is engaged with the clamping teeth (2231).

6. A device for applying a water-resistant coating to corrugated paperboard as defined in claim 1, wherein The nozzles (25) are at least partially located in the mounting box (23). The mounting box (23) is provided with an extension plate (233) surrounding the strip-shaped hole (231). The extension plate (233) extends towards the nozzles (25). The lower end of the nozzles (25) is higher than the upper end of the extension plate (233).

7. A device for applying a water-resistant coating to corrugated paperboard as defined in claim 6, wherein The extension plate (233) is obliquely arranged. The end of the extension plate (233) facing the nozzles (25) is inclined towards the center position of the mounting box (23). The opening size of the strip-shaped hole (231) gradually increases from the inside to the outside.

8. A device for applying a water-resistant coating to corrugated paperboard as defined in claim 1, wherein The inner bottom surface of the mounting box (23) is obliquely arranged along the length direction, the mounting box (23) comprises a lowest end (237), and the mounting box (23) is provided with a collecting hopper (238) located at the lowest end (237) of the mounting box (23).

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