Hot melt adhesive coating device with adjustable coating width

Abstract

The utility model discloses a hot melt adhesive coating device with adjustable coating width, which relates to the technical field of hot melt adhesive coating equipment, and comprises a conveying belt body, an adhesive storage box arranged above the conveying belt body, an adhesive coating roller arranged between the conveying belt body and the adhesive storage box, an adhesive coating assembly for adjusting the coating width, a first connecting rack, a second connecting rack, a third connecting rack and a fourth connecting rack, the glue spreading rollers are arranged on the opposite sides of the glue storage box by taking the vertical axis of the glue storage box as the center and can slide along the length direction of the glue spreading roller; the driving gear is rotationally connected to the upper portion of the glue spreading roller and is in meshed connection with the first connecting rack; according to the utility model, the glue outlet area can be accurately adjusted according to workpieces with different widths, and the gluing uniformity and accuracy are ensured. The glue amount can be automatically adjusted for different sizes and models of workpieces of the same type, glue waste is avoided, the gluing quality is guaranteed, the flow-out amount of glue can be controlled by the intercepting plate through cooperation of the wedge-shaped block and the connecting block, and different requirements are met.

Description

Technical Field

[0001] This utility model relates to the technical field of hot melt adhesive coating equipment, specifically a hot melt adhesive coating device with adjustable coating width. Background Technology

[0002] A hot melt adhesive coating machine is a device that heats and melts solid polymers to a certain degree, transforming them into a flowable liquid adhesive with a certain viscosity, and then applies it to a substrate. Generally, there are two types of coating mechanisms in commercially available hot melt adhesive coating machines. One type uses a coating gun for coating. This type of coating mechanism has a relatively complex structure, requires a specially designed coating platform, is cumbersome to manufacture, and is limited by the size of the coating gun, resulting in lower coating efficiency and uneven coating. The other type uses a coating die for coating. However, the coating width of a coating die is generally not adjustable, making it difficult to accurately coat substrates of different widths.

[0003] A Chinese patent (publication number: CN207013224U) discloses a hot melt adhesive coating device with adjustable coating width, including an adhesive inlet seat and a coating head. The coating head has an adhesive outlet, and the adhesive inlet seat is fixedly mounted on the coating head. The adhesive inlet seat has an adhesive inlet, and the inner cavities of the coating head and the adhesive inlet seat are interconnected. The coating head has a groove at the adhesive outlet, and a slider is provided in the groove. The slider can be controlled by a drive mechanism to slide and partially block the adhesive outlet. Using the above technical solution, the coating efficiency is high, the coating is uniform, and the width of the adhesive outlet of the coating head can be effectively adjusted to adapt to coating widths of different widths.

[0004] The aforementioned coating device utilizes a lead screw to drive a slider, thereby sealing the glue outlet and adapting to coating workpieces of varying widths. While it can coat workpieces, it cannot simultaneously control the glue dispensing volume. Specifically, for the same workpiece, as its size decreases, the required glue volume also decreases, but the glue dispensing volume cannot be reduced accordingly, easily leading to glue waste. Furthermore, excessive glue may overflow onto the workpiece surface, affecting coating quality and aesthetics. Utility Model Content

[0005] The purpose of this invention is to provide a hot melt adhesive coating device with adjustable coating width to solve the problems mentioned in the background art.

[0006] To solve the above-mentioned technical problems, the present invention provides a hot melt adhesive coating device with adjustable coating width, comprising a conveyor belt body, an adhesive storage tank disposed above the conveyor belt body, an adhesive coating roller disposed between the conveyor belt body and the adhesive storage tank, and an adhesive coating assembly for adjusting the coating width, including,

[0007] The first connecting rack, numbering at least two, is arranged on the glue-coating roller with the vertical axis of the glue storage tank as the center and opposite sides, and can slide along the length of the glue-coating roller.

[0008] The drive gear is rotatably connected above the glue-applying roller and meshes with the first connecting rack;

[0009] The second connecting rack is vertically slidable above the glue-applying roller and can slide vertically up and down as the drive gear rotates clockwise or counterclockwise.

[0010] A wedge block is connected to the side of the second connecting rack away from the drive gear. A connecting block is also provided above the glue coating roller. The wedge block slides vertically and moves towards or away from the glue storage tank outlet pipe. One end of the connecting block is connected to a flow cut-off plate for cutting off the glue flow.

[0011] Furthermore, a transmission assembly is also provided above the coating roller, including,

[0012] The first sprocket is rotatably connected above the glue-applying roller and meshes with the first connecting rack.

[0013] The second sprocket is rotatably connected above the coating roller, and a drive chain connects the second sprocket and the first sprocket.

[0014] The driven gear is rotatably connected above the glue-applying roller and is coaxially arranged with the second sprocket. The driven gear is meshed with the second connecting rack.

[0015] Furthermore, the adhesive application assembly includes,

[0016] At least two first telescopic cylinders are symmetrically connected on both sides of the coating roller. The telescopic end of the first telescopic cylinder is connected to a sealing slider. The first connecting rack is connected to the sealing slider. The coating roller is connected to a glue outlet pipe, which is connected to the discharge pipe of the glue storage tank. As the sealing slider extends or retracts, the glue outlet area of ​​the glue outlet pipe expands or shrinks.

[0017] Furthermore, an mounting plate is connected to the coating roller, and both the drive gear and the driven gear are rotatably connected to the mounting plate.

[0018] Furthermore, a guide block is connected to one side of the second connecting rack, the guide block is slidably connected to the mounting plate, and the mounting plate is provided with a groove that matches the guide block.

[0019] Furthermore, a roller is connected to the end of the connecting block away from the cut-off plate. As the wedge block moves vertically upward, the roller gradually moves towards the discharge pipe.

[0020] Furthermore, the conveyor belt body is connected to two symmetrically arranged second telescopic cylinders, and the telescopic ends of the second telescopic cylinders are connected to the coating roller.

[0021] Furthermore, one side of the roller is connected to symmetrical telescopic springs, and the other end of the telescopic springs is connected to the discharge pipe.

[0022] Compared with the prior art, the beneficial effects of this utility model are:

[0023] 1. It can precisely adjust the glue dispensing area according to workpieces of different widths, ensuring uniformity and accuracy of glue application. For different sizes and models of the same workpiece, it can automatically adjust the glue amount to avoid glue waste and ensure glue application quality. The cooperation between the wedge block and the connecting block allows the cut-off plate to control the glue flow rate, adapting to different needs.

[0024] 2. By setting different inner diameter first and second sprockets to achieve a differential speed effect, only slight adjustment of the cut-off plate position is needed when adjusting the dispensing area, which improves the flexibility of adjustment. At the same time, this design can adjust the transmission ratio according to actual production needs, adapt to different working conditions, and enhance the versatility of the device. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0026] Figure 2 This is a side view of the present invention;

[0027] Figure 3 This is a schematic diagram of the connection structure between the coating roller and the glue storage tank in this utility model;

[0028] Figure 4 This utility model Figure 2 Enlarged view of the structure at point A in the middle;

[0029] Figure 5 This utility model Figure 3 Enlarged view of the structure at point B.

[0030] In the diagram: 1. Conveyor belt body; 2. Glue storage tank; 3. Glue application roller; 400. Glue application assembly; 401. First telescopic cylinder; 402. Sealing slider; 403. Glue outlet pipe; 500. Adjustment assembly; 501. First connecting rack; 502. Drive gear; 503. Second connecting rack; 504. Wedge block; 505. Connecting block; 600. Transmission assembly; 601. First sprocket; 602. Second sprocket; 603. Transmission chain; 604. Driven gear; 7. Guide block; 8. Roller; 9. Second telescopic cylinder; 10. Telescopic spring. Detailed Implementation

[0031] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0032] Please see Figure 1-5 This utility model provides a technical solution: a hot melt adhesive coating device with adjustable coating width, including a conveyor belt body 1, an adhesive storage tank 2 disposed above the conveyor belt body 1, an adhesive coating roller 3 disposed between the conveyor belt body 1 and the adhesive storage tank 2, and an adhesive coating assembly 400 for adjusting the coating width, including...

[0033] The first connecting rack 501, the number of which is at least two, is arranged on the glue coating roller 3 with the vertical axis of the glue storage box 2 as the center and opposite sides, and can slide along the length of the glue coating roller 3.

[0034] The drive gear 502 is rotatably connected above the glue-applying roller 3 and meshes with the first connecting rack 501;

[0035] The second connecting rack 503 is vertically slidably disposed above the glue-applying roller 3, and can slide vertically up and down as the drive gear 502 rotates clockwise and counterclockwise.

[0036] A wedge block 504 is connected to the side of the second connecting rack 503 away from the drive gear 502. A connecting block 505 is also provided above the glue roller 3. As the wedge block 504 slides vertically, it slides towards or away from the discharge pipe of the glue storage tank 2. One end of the connecting block 505 is connected to a flow cutter plate for cutting off the glue flow.

[0037] The first connecting rack 501, the drive gear 502, the second connecting rack 503, the wedge block 504, and the connecting block 505 together constitute the adjustment assembly 500;

[0038] The adhesive application assembly 400 includes,

[0039] At least two first telescopic cylinders 401 are symmetrically connected on both sides of the coating roller 3. The telescopic end of the first telescopic cylinder 401 is connected to a sealing slider 402. The first connecting rack 501 is connected to the sealing slider 402. The coating roller 3 is connected to a glue outlet pipe 403. The glue outlet pipe 403 is connected to the discharge pipe of the glue storage tank 2. As the sealing slider 402 telescopically extends or retracts, the glue outlet area of ​​the glue outlet pipe 403 expands or shrinks.

[0040] In practice, when applying adhesive to workpieces of different widths, the extension and retraction of the first telescopic cylinder 401 causes the sealing slider 402 to move on the adhesive application roller 3. The adhesive application roller 3 is connected to an adhesive outlet pipe 403, which is connected to the discharge pipe of the adhesive storage tank 2. As the sealing slider 402 extends and retracts, it may obstruct or expose a portion of the adhesive outlet pipe 403, thereby expanding or shrinking the adhesive outlet area of ​​the adhesive outlet pipe 403.

[0041] While changing the glue dispensing area, for the same workpiece, smaller models may require less glue than larger models. Therefore, when the sealing slider 402 slides, the first connecting rack 501 can also slide, and the sliding of the first connecting rack 501 drives the drive gear 502 that meshes with it to rotate. The rotation of the drive gear 502 causes the vertically sliding second connecting rack 503 to slide vertically up and down. The second connecting rack 503 drives the wedge block 504 to move synchronously, and the vertical movement of the wedge block 504 changes its relative position with the connecting block 505.

[0042] When the wedge block 504 slides upward, its inclined surface pushes the connecting block 505 to slide away from the discharge pipe of the glue storage tank 2. The intercepting plate at one end of the connecting block 505 also moves accordingly to intercept the glue and reduce the amount of glue flowing out.

[0043] refer to Figure 5 Above the coating roller 3, a transmission assembly 600 is also provided, including,

[0044] The first sprocket 601 is rotatably connected above the glue-applying roller 3 and meshes with the first connecting rack 501, and is coaxially arranged with the drive gear 502;

[0045] The second sprocket 602 is rotatably connected above the glue-applying roller 3, and a transmission chain 603 is connected between the second sprocket 602 and the first sprocket 601.

[0046] Driven gear 604 is rotatably connected above the glue-applying roller 3 and is coaxially arranged with the second sprocket 602. Driven gear 604 is meshed with the second connecting rack 503.

[0047] It should be noted that since the diameter of the discharge pipe is generally smaller than the discharge length of the dispensing pipe 403, when adjusting the discharge area of ​​the dispensing pipe 403, only a slight adjustment of the position of the baffle plate is needed. Therefore, the inner diameter of the first sprocket 601 is designed to be smaller than the inner diameter of the second sprocket 602 to achieve a certain differential speed effect. The specific transmission ratio can be adjusted according to the actual production needs, and no specific restrictions are imposed here, as long as the differential speed effect can be guaranteed.

[0048] In practice, the drive gear 502 can drive the first sprocket 601, which is coaxial with it, to rotate during rotation. Then, the first sprocket 601 drives the second sprocket 602 to rotate through the transmission effect of the transmission chain 603. The second sprocket 602 can then drive the driven gear 604 to rotate. At this time, the second connecting rack 503, which meshes with the driven gear 604, can move vertically, which facilitates the adjustment of the position of the baffle plate.

[0049] refer to Figures 3 to 5 An installation plate is connected to the glue-applying roller 3, and the drive gear 502 and the driven gear 604 are rotatably connected to the installation plate.

[0050] In practice, this setup allows for the convenient installation of components such as the drive gear 502 and the driven gear 604 using the mounting plate.

[0051] refer to Figure 5 A guide block 7 is connected to one side of the second connecting rack 503. The guide block 7 is slidably connected to the mounting plate, and the mounting plate has a groove that matches the guide block 7.

[0052] In practice, the guide block 7 can limit and guide the sliding of the second connecting rack 503, further improving the stability of the second connecting rack 503 during the sliding process.

[0053] refer to Figure 5 The end of the connecting block 505 away from the cut-off plate is connected to a roller 8. As the wedge block 504 moves vertically upward, the roller 8 gradually moves toward the discharge pipe.

[0054] Specifically, the roller 8 is designed to reduce the friction between the connecting block 505 and the wedge block 504, making it easier for the wedge block 504 to push the connecting block 505 to move.

[0055] refer to Figure 1 The conveyor belt body 1 is connected to two symmetrical second telescopic cylinders 9, and the telescopic ends of the second telescopic cylinders 9 are connected to the coating roller 3.

[0056] Specifically, the second telescopic cylinder 9 is designed to facilitate the adjustment of the coating thickness of the coating roller 3.

[0057] refer to Figure 5 One side of the roller 8 is connected to a symmetrical telescopic spring 10, and the other end of the telescopic spring 10 is connected to the discharge pipe.

[0058] Specifically, the extension spring 10 is designed to facilitate the return of the connecting block 505 to its original position when the wedge block 504 is not in contact with the connecting block 505.

[0059] Working principle: When applying glue to workpieces of different widths, the extension and retraction of the first telescopic cylinder 401 causes the sealing slider 402 to move on the glue application roller 3. The glue application roller 3 is connected to a glue outlet pipe 403, which is connected to the discharge pipe of the glue storage tank 2. As the sealing slider 402 extends and retracts, it either blocks or exposes a portion of the glue outlet pipe 403, thus expanding or shrinking the glue outlet area of ​​the glue outlet pipe 403.

[0060] While changing the glue dispensing area, for the same workpiece, smaller models may require less glue than larger models. Therefore, when the sealing slider 402 slides, the first connecting rack 501 can also slide, and the sliding of the first connecting rack 501 drives the drive gear 502 that meshes with it to rotate. The rotation of the drive gear 502 causes the vertically sliding second connecting rack 503 to slide vertically up and down. The second connecting rack 503 drives the wedge block 504 to move synchronously, and the vertical movement of the wedge block 504 changes its relative position with the connecting block 505.

[0061] When the wedge block 504 slides upward, its inclined surface pushes the connecting block 505 to slide away from the discharge pipe of the glue storage tank 2. The intercepting plate at one end of the connecting block 505 also moves accordingly to intercept the glue and reduce the amount of glue flowing out.

Claims

1. A hot melt adhesive coating device with adjustable coating width, comprising a conveying belt body (1), a glue storage tank (2) arranged above the conveying belt body (1), a glue coating roller (3) arranged between the conveying belt body (1) and the glue storage tank (2), and a glue coating assembly (400) for adjusting the coating width, characterized in that, The application relates to a glue coating assembly. A first connecting rack (501) is arranged on the glue coating roller (3) and can slide along the length direction of the glue coating roller (3); the first connecting rack (501) is arranged on the opposite side of the vertical axis of the glue storage box (2) and is at least two in number; A driving gear (502) is rotatably connected above the glue coating roller (3) and is in meshing connection with the first connecting rack (501); A second connecting rack (503) is arranged above the glue coating roller (3) and can vertically slide; the second connecting rack (503) can vertically slide up and down along the clockwise and counterclockwise rotation of the driving gear (502); A wedge block (504) is connected to the side of the second connecting rack (503) away from the driving gear (502); a connecting block (505) is further arranged above the glue coating roller (3) and can slide towards or away from the discharge pipe of the glue storage box (2) along with the vertical sliding of the wedge block (504); one end of the connecting block (505) is connected with a cut-off plate for cutting off the glue.

2. The hot melt applicator of claim 1, wherein: A transmission assembly (600) is further arranged above the glue coating roller (3) and comprises A first sprocket (601) is rotatably connected above the glue coating roller (3) and is in meshing connection with the first connecting rack (501); A second sprocket (602) is rotatably connected above the glue coating roller (3); a transmission chain (603) is in transmission connection between the second sprocket (602) and the first sprocket (601); A driven gear (604) is coaxially arranged with the second sprocket (602) and is rotatably connected above the glue coating roller (3); the driven gear (604) is in meshing connection with the second connecting rack (503).

3. The hot melt applicator of claim 1 wherein: The glue coating assembly (400) comprises At least two first telescopic air cylinders (401) are symmetrically connected to the two sides of the glue coating roller (3); the telescopic end of the first telescopic air cylinder (401) is connected with a blocking sliding block (402); the first connecting rack (501) is connected to the blocking sliding block (402); a glue outlet pipe (403) is connected in the glue coating roller (3); the glue outlet pipe (403) is in communication with the discharge pipe of the glue storage box (2); the glue outlet area of the glue outlet pipe (403) is expanded or reduced along with the telescopic movement of the blocking sliding block (402).

4. The hot melt applicator of claim 2, wherein: The glue coating roller (3) is connected with a mounting plate; the driving gear (502) and the driven gear (604) are rotatably connected to the mounting plate.

5. The hot melt applicator of claim 1 wherein: A guide block (7) is connected to one side of the second connecting rack (503); the guide block (7) is slidably connected to the mounting plate; a sliding groove matched with the guide block (7) is formed in the mounting plate.

6. The hot melt applicator of claim 2 wherein: A roller (8) is connected to the end of the connecting block (505) away from the cut-off plate; the roller (8) gradually moves towards the discharge pipe along with the vertical upward movement of the wedge block (504).

7. The hot melt applicator of claim 1 wherein: Two second telescopic air cylinders (9) are symmetrically connected to the glue coating roller (3); the telescopic end of the second telescopic air cylinder (9) is connected to the glue coating roller (3).

8. The hot melt applicator of claim 6, wherein: A telescopic spring (10) is symmetrically connected to one side of the roller (8); the other end of the telescopic spring (10) is connected to the discharge pipe.

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