Device for enhancing bonding strength between layers of white board

Abstract

The utility model discloses a device for enhancing the bonding strength between layers of a white board. The device is characterized by further comprising a dynamic pressing mechanism arranged on a rack, after an adhesive is added to the paper layers of the white board paper through the coating device, bubbles retained in the adhesive are discharged by vibrating the paper layers through the arrangement of the eccentric wheel excitation device before a calendaring process, and meanwhile, the permeability of glue can be improved, so that the gluing quality between the paper layers is improved; the phenomena of bubbles, edge warping and the like after the paper layer is bonded are avoided; the pressure of the compression rollers is gradually increased one by one, the pressure of the first compression roller on the paper layer is minimum, and then the pressure is gradually increased one by one, so that the shear stress of the paper layer is reduced, and the uniformity of the adhesive layer is improved; therefore, the bonding strength between the paper layers is enhanced; the heating device is arranged on the pressing roller, heat is transmitted to the paper layer through the roller in the roller pressing process, rapid curing of glue is promoted, and therefore the production speed is increased.

Description

Technical Field

[0001] This utility model relates to the field of whiteboard paper processing technology, specifically to a device for enhancing the bonding strength between layers of whiteboard paper. Background Technology

[0002] Whiteboard paper is produced through processes such as coating, calendering, curing, cutting, and winding. Existing equipment suffers from several drawbacks during coating. The adhesive tends to generate gas during mixing, leading to residual air bubbles in the coated paper layers. This can cause problems like delamination and weak adhesion in subsequent production processes. Furthermore, during calendering, the pressure from the rollers is often uniform, resulting in high shear stress and uneven adhesive application, further contributing to delamination. Additionally, larger sheets of paper require longer curing times, slowing down production efficiency. Therefore, a device to enhance the bonding strength between whiteboard paper layers is proposed. Utility Model Content

[0003] The main purpose of this utility model is to provide a solution that can effectively address the problems in the background art.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a device for enhancing the bonding strength between layers of whiteboard paper, comprising a frame and a coating device disposed on the frame, characterized in that: it further comprises a dynamic pressing mechanism disposed on the frame, the dynamic pressing mechanism comprising a plurality of pressure rollers disposed on the frame with progressively increasing pressure, a plurality of heaters installed inside the pressure rollers, and a plurality of eccentric wheel excitation devices disposed on the frame and located in front of the pressure rollers.

[0005] Preferably, the pressure roller includes an active pressure roller, a driven pressure roller that rotates in cooperation with the active pressure roller, bearings disposed on the active and driven pressure rollers, a support seat disposed on the frame and connected to the bearings for supporting the active and driven pressure rollers, and an adjustment mechanism for adjusting the distance between the active and driven pressure rollers.

[0006] Preferably, the adjustment mechanism includes an adjustment handle, a lead screw connected to one end of the adjustment handle, a nut seat adapted to the lead screw and also connected to the bearing of the active pressure roller, and a lead screw support seat mounted on the frame for fixing the lead screw and the nut seat.

[0007] Preferably, the hole on the support base that connects to the bearing of the driven pressure roller is a slotted hole.

[0008] Preferably, the frame is equipped with several drive motors connected to the eccentric wheel excitation device or the active pressure roller.

[0009] Preferably, the eccentric wheel vibration device includes a drive shaft connected to a drive motor, an eccentric wheel connected to the drive shaft, a driven shaft connected to the eccentric wheel, and several bearing seats mounted on the frame and adapted to the drive shaft and the driven shaft.

[0010] This invention has the following beneficial effects: After the whiteboard paper layers are coated with adhesive, the eccentric wheel vibration device vibrates the paper layers before the calendering process, expelling air bubbles trapped in the adhesive and improving the penetration of the adhesive, thereby improving the bonding quality between the paper layers and preventing air bubbles and curling edges after bonding. Furthermore, the paper layers are pressed by progressively increasing pressure rollers, with the first roller exerting the least pressure on the paper layer, and then the pressure gradually increasing, reducing the shear stress of the paper layers and improving the uniformity of the adhesive layer, thus enhancing the bonding strength between the paper layers. By installing a heating device on the pressure rollers, heat is transferred to the paper layers during the pressing process, promoting rapid curing of the adhesive and increasing production speed. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the pressure roller structure of this utility model;

[0013] Figure 3 This is a schematic diagram of the eccentric wheel excitation device of this utility model;

[0014] Figure 4 This is a schematic diagram of the adjustment mechanism of this utility model.

[0015] Legend: 1. Frame; 2. Coating device; 3. Pressure roller; 31. Driven pressure roller; 32. Driven pressure roller; 33. Bearing; 34. Adjustment mechanism; 341. Adjustment handle; 342. Lead screw; 343. Nut seat; 344. Lead screw support seat; 35. Support seat; 4. Heater; 5. Eccentric wheel excitation device; 51. Drive shaft; 52. Eccentric wheel; 53. Driven shaft; 54. Bearing seat; 6. Drive motor. Detailed Implementation

[0016] To make the technical means, creative features, objectives and effects of this utility model easier to understand, the present utility model will be further described below in conjunction with specific embodiments.

[0017] like Figure 1-4As shown, a device for enhancing the adhesion strength between layers of whiteboard paper includes a frame 1 and a coating device 2 mounted on the frame 1. The device further includes a dynamic pressing mechanism mounted on the frame 1. The dynamic pressing mechanism comprises several sets of pressure rollers 3 with progressively increasing pressure mounted on the frame 1, several heaters 4 installed within the pressure rollers 3, and several eccentric wheel vibration devices 5 mounted on the frame 1 and located in front of the pressure rollers 3. After the whiteboard paper layers are coated with adhesive by the coating device 2, the eccentric wheel vibration devices 5 vibrate the paper layers before the calendering process. This process removes trapped air bubbles from the adhesive and improves its permeability, thereby enhancing the bonding quality between paper layers and preventing air bubbles and curling edges after bonding. The pressure is then increased by progressively increasing pressure rollers 3, with the first roller exerting the least pressure on the paper layer, followed by progressively increasing pressure. This reduces the shear stress on the paper layers and improves the uniformity of the adhesive layer, thus strengthening the bond strength between the paper layers. Furthermore, a heating device 32 is installed on the rollers 3, which transfers heat to the paper layer during the pressing process, promoting rapid curing of the adhesive and increasing production speed.

[0018] In one embodiment, the pressure roller 3 includes an active pressure roller 31, a driven pressure roller 32 that rotates in cooperation with the active pressure roller 31, a bearing 33 disposed on the active pressure roller 31 and the driven pressure roller 32, a support seat 35 disposed on the frame 1 and connected to the bearing 33 for supporting the active pressure roller 31 and the driven pressure roller 32, and an adjustment mechanism 34 for adjusting the distance between the active pressure roller 31 and the driven pressure roller 32.

[0019] In one embodiment, the adjustment mechanism 34 includes an adjustment handle 341, a lead screw 342 connected to one end of the adjustment handle 341, a nut seat 343 adapted to the lead screw 342 and also connected to the bearing 33 of the active pressure roller 31, and a lead screw support seat 344 disposed on the frame 1 for fixing the lead screw 342 and the nut seat 343.

[0020] In one embodiment, the hole on the support seat 35 that connects to the bearing 33 of the driven pressure roller 32 is a waist-shaped hole 351. The adjustment mechanism 34 adjusts the distance between the bearing 33 of the driven pressure roller 32 and the active pressure roller 31 by rotating the lead screw 342 within the waist-shaped hole 351.

[0021] In one embodiment, the frame 1 is provided with a plurality of drive motors 6 connected to the eccentric wheel excitation device 5 or the active pressure roller 31.

[0022] In one embodiment, the eccentric wheel excitation device 5 includes a drive shaft 51 connected to a drive motor 6, an eccentric wheel 52 connected to the drive shaft 51, a driven shaft 53 connected to the eccentric wheel 52, and a plurality of bearing seats 54 mounted on the frame 1 and adapted to the drive shaft 51 and the driven shaft 53.

[0023] In use, the roll of paper is installed on the frame 1. When the paper layer is conveyed to the coating device 2, the coating device 2 evenly applies adhesive to the paper layer. Vibration of the eccentric wheel excitation device 5 drives the drive motor 6 to rotate the drive shaft 51, which in turn drives the eccentric wheel 52, causing the paper layer to vibrate up and down, expelling air bubbles from the adhesive coating. The paper is then pressed by the heated pressure roller 3. The bearing 33 on the drive roller 31 is connected to the drive motor 6. When the drive roller 31 rotates, it drives the driven roller 32 to rotate. The adjustment mechanism 34 on the driven pressure roller 32 can adjust the pressure of the pressure roller 3 by adjusting the distance between the driven pressure roller 32 and the driving pressure roller 31. The adjustment mechanism 34 drives the lead screw 342 to rotate by rotating the adjustment handle 341. The lead screw 342 drives the nut seat 343 to move on the lead screw support seat 344. The nut seat 343 drives the bearing 33 on the driven pressure roller 32 to move up and down in the waist-shaped hole 351 on the support seat 35. The pressure of the first pressure roller 3 is the smallest and increases sequentially. The paper layer can be quickly bonded and cured by the pressure roller 3.

[0024] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A device for enhancing the adhesive strength between layers of whiteboard paper, comprising a frame (1) and a coating device (2) disposed on the frame (1), characterized in that: It also includes a dynamic pressing mechanism set on the frame (1), which includes several sets of pressure rollers (3) with progressively increasing pressure set on the frame (1), several heaters (4) installed in the pressure rollers (3), and several eccentric wheel excitation devices (5) set on the frame (1) and located in front of the pressure rollers (3).

2. The device for enhancing the adhesive strength between layers of whiteboard paper according to claim 1, characterized in that: The pressure roller (3) includes an active pressure roller (31), a driven pressure roller (32) that rotates in cooperation with the active pressure roller (31), a bearing (33) disposed on the active pressure roller (31) and the driven pressure roller (32), a support seat (35) disposed on the frame (1) and connected to the bearing (33) for supporting the active pressure roller (31) and the driven pressure roller (32), and an adjustment mechanism (34) for adjusting the distance between the active pressure roller (31) and the driven pressure roller (32).

3. The device for enhancing the adhesive strength between layers of whiteboard paper according to claim 2, characterized in that: The adjustment mechanism (34) includes an adjustment handle (341), a lead screw (342) connected to one end of the adjustment handle (341), a nut seat (343) adapted to the lead screw (342) and also connected to the bearing (33) of the active pressure roller (31), and a lead screw support seat (344) set on the frame (1) for fixing the lead screw (342) and the nut seat (343).

4. The device for enhancing the adhesive strength between layers of whiteboard paper according to claim 2, characterized in that: The hole on the support base (35) that connects to the bearing (33) of the driven pressure roller (32) is a waist-shaped hole (351).

5. The device for enhancing the adhesive strength between layers of whiteboard paper according to claim 1, characterized in that: The frame (1) is equipped with several drive motors (6) connected to the eccentric wheel excitation device (5) or the active pressure roller (31).

6. The device for enhancing the adhesive strength between layers of whiteboard paper according to claim 1, characterized in that: The eccentric wheel excitation device (5) includes a drive shaft (51) connected to a drive motor (6), an eccentric wheel (52) connected to the drive shaft (51), a driven shaft (53) connected to the eccentric wheel (52), and a plurality of bearing seats (54) provided on the frame (1) to be adapted to the drive shaft (51) and the driven shaft (53).

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