A scraper structure and a scraper coating mechanism

Abstract

This invention provides a doctor blade coating mechanism. The mechanism includes a doctor blade structure, which comprises a doctor blade, a channel section, and a coating section. The channel section has multiple parallel flow channel holes. One end of each flow channel hole is connected to the end face of the channel section opposite to the coating section, and the other end is connected to the coating section. A pair of baffles are fixedly connected to the coating section, and all flow channel holes are located between the two baffles. In this design, the coating material transitions to the coating section after passing through the flow channel holes. The flow channel holes are arranged in the width direction, which makes the coating flow rate at each position relatively more uniform, reduces the degree of flow rate difference, and ultimately makes the subsequent coating of the coated paper more uniform to a certain extent. This solves the problem in the prior art that the coating flow rate difference in the width direction is prone to be large, which adversely affects the quality of the subsequent coated paper.

Description

Technical Field

[0001] This utility model relates to the field of coating equipment technology, and in particular to a scraper structure and a scraper-type coating mechanism. Background Technology

[0002] Coated paper is made by coating a layer of coating material onto base paper, giving it excellent optical properties and printability. Coated paper can be broadly categorized into: art paper, coated paper, and lightweight coated paper, in addition to special types such as chrome-coated paper. The processing requires a coating system, which typically includes a hopper and a coating structure. During coating operations, coating rollers support the base paper, and a doctor blade is used in the coating structure. The coating material is loaded into the hopper, flows through the hopper onto the doctor blade, and then is transferred onto the base paper. In practice, the coating material needs to cover a significant distance in the width direction from the hopper to the doctor blade, and considerable flow rate differences may occur at various locations. This results in uneven coating distribution in the width direction after coating, ultimately negatively impacting the quality of the coated paper. Utility Model Content

[0003] In view of the shortcomings of the prior art, the present invention provides a doctor blade structure, which solves the problem that the coating flow rate difference in the width direction is prone to cause adverse effects on the quality of the subsequent coated paper.

[0004] According to an embodiment of this utility model, a doctor blade structure includes a doctor blade, which comprises a channel section and a coating section. The channel section is provided with multiple flow channel holes arranged side by side. One end of each flow channel hole is connected to the end face of the channel section opposite to the coating section, and the other end is connected to the coating section. A pair of baffles are fixedly connected to the coating section, and all flow channel holes are located between the two baffles. In this solution, the coating material transitions to the coating section after passing through the flow channel holes. The flow channel holes are arranged in the width direction, which makes the coating flow rate at each position relatively more equal, reduces the degree of flow rate difference, and ultimately makes the subsequent coating of the coated paper more uniform to a certain extent. This solves the problem in the prior art that the coating flow rate difference in the width direction is prone to be large, which adversely affects the quality of the subsequent coated paper.

[0005] Furthermore, the cross-section of the flow channel hole is an arched structure, and the bottom surface of the arched structure is flush with the top surface of the coating section.

[0006] Furthermore, the coating section gradually thins at the end away from the channel section and has an arc-shaped flow surface similar to the flow channel hole.

[0007] Furthermore, a connecting part is fixedly connected to the end of the channel section away from the coating section.

[0008] According to an embodiment, a blade coating mechanism including the above-described blade structure is also provided, which further includes a hopper, and the connecting part and the bottom of the hopper are detachably connected. The bottom of the hopper is also provided with a plurality of discharge holes that communicate with each flow channel hole, and all discharge holes are also connected to the hopper.

[0009] Furthermore, a sealing gasket is sandwiched between the hopper and the channel section, and the sealing gasket is provided with multiple perforations that connect to the corresponding discharge hole and flow channel hole respectively.

[0010] Furthermore, the hopper is recessed and has a connecting groove, and the connecting part is inserted into the connecting groove and connected to the hopper through a connector.

[0011] Furthermore, the scraper is angled, with the connecting part located on the higher side.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] The provided doctor blade coating mechanism has a channel section and a coating section on the doctor blade. The channel section has multiple parallel flow channels for receiving the coating material from the hopper. After passing through the flow channels, the coating material transitions to the coating section. The flow channels are arranged in the width direction, which makes the coating flow rate at each position more uniform and reduces the degree of flow difference. Ultimately, this makes the coating of the subsequent coated paper more uniform to a certain extent, solving the problem in the prior art that the coating flow rate difference in the width direction is prone to cause adverse effects on the quality of the subsequent coated paper. Attached Figure Description

[0014] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0015] Figure 2 for Figure 1 Enlarged schematic diagram of a local structure at point A;

[0016] Figure 3 This is a schematic diagram of the flow channel hole arrangement according to an embodiment of the present invention;

[0017] In the above attached figures:

[0018] 1. Material hopper, 2. Channel section, 3. Coating section, 4. Flow channel hole, 5. Material outlet hole, 6. Base paper, 7. Baffle, 8. Connecting part, 9. Connecting groove, 10. Coating roller, 11. Sealing gasket, 12. Detailed Implementation

[0019] The technical solution of this utility model will be further described below with reference to the accompanying drawings and embodiments.

[0020] In the description of this utility model, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship are based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0021] In an exemplary implementation, such as Figure 1-3 As shown, this embodiment provides a doctor blade coating mechanism, which includes a hopper 1 and a doctor blade structure connected to the hopper 1. The doctor blade structure includes a doctor blade, which includes a channel section 2 and a coating section 3. The channel section 2 is provided with a plurality of parallel flow channel holes 4. One end of each flow channel hole 4 is connected to the end face of the channel section 2 away from the coating section 3, and the other end is connected to the coating section 3. Further, the channel section 2 is detachably connected to the bottom of the hopper 1, and the bottom of the hopper 1 is also provided with a plurality of discharge holes 5 connecting it to each flow channel hole 4. The coating material loaded in the hopper 1 is diverted into the flow channel holes 4 after passing through the discharge holes 5 at the bottom, and then transferred to the coating section 3. Finally, the coating transitions from coating section 3 to the base paper 6 to be coated. A pair of baffles 7 are fixedly connected to coating section 3, and all flow channel holes 4 are located between the two baffles 7. The two baffles 7 restrict the coating on both sides to prevent the coating from leaving to the side. During the process, the coating passes through the flow channel holes 4 and transitions to coating section 3. The flow channel holes 4 are arranged in the width direction, which can make the coating flow rate at each position relatively more equal, reduce the degree of flow difference, and ultimately make the subsequent coating of the paper more uniform to a certain extent. This solves the problem in the prior art that the coating flow rate difference in the width direction is prone to a large degree, which leads to the adverse effect on the quality of the subsequent coated paper.

[0022] In a further embodiment, the cross-section of the flow channel hole 4 is arched, and the bottom surface of the arched structure is flush with the top surface of the coating section 3. This allows the coating material to reach the coating section 3 more smoothly. Similarly, the cross-section of the perforation is also arched. In an even further embodiment, a connecting part 8 is fixedly connected to the end of the channel section 2 away from the coating section 3, and a connecting groove 9 is recessed on the hopper 1. The connecting part 8 is inserted into the connecting groove 9 and connected to the hopper 1 through a connector 10, which can be a screw, so that the scraper can be connected to the hopper 1. The scraper can also be inclined as a whole, and the connecting part 8 is located on the higher side. In the overall sample, the coating flows downward at an angle, making it smoother. In a more detailed design, the coating section 3 gradually thins at the end away from the channel section 2 and has an arc-shaped flow surface similar to the flow channel hole 4. The end of the arc-shaped flow surface is used to approach the coating roller 11 (there is a gap between the end of the coating section 3 and the coating roller 11 for the base paper 6 to pass through). The base paper 6 is supported on the coating roller 11, so that the coating is applied from the doctor blade to the base paper 6. In order to prevent leakage between the doctor blade and the hopper 1, a sealing gasket 12 is also sandwiched between the hopper 1 and the channel section 2. The sealing gasket 12 is provided with multiple perforations that respectively connect to the corresponding discharge hole 5 and the flow channel hole 4.

[0023] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A doctor blade structure, characterized by, It includes a doctor blade, which includes a channel section and a coating section. The channel section is provided with multiple flow channel holes arranged side by side. One end of each flow channel hole is connected to the end face of the channel section away from the coating section, and the other end is connected to the coating section. A pair of baffles are also fixedly connected to the coating section, and all flow channel holes are located between the two baffles.

2. The scraper structure as described in claim 1, characterized in that, The cross-section of the flow channel hole is an arched structure, and the bottom surface of the arched structure is flush with the top surface of the coating section.

3. The scraper structure as described in claim 2, characterized in that, The coating section gradually thins at the end away from the channel section and has an arc-shaped flow surface similar to the flow channel orifice.

4. The scraper structure as described in any one of claims 1-3, characterized in that, The end of the channel section away from the coating section is also fixedly connected to a connecting part.

5. A doctor blade coating mechanism, characterized in that, The device includes the scraper structure as described in claim 4, and also includes a hopper, wherein the connecting part and the bottom of the hopper are detachably connected, and the bottom of the hopper is provided with a plurality of discharge holes that communicate with each flow channel hole, and all discharge holes are also connected to the hopper.

6. The doctor blade coating mechanism as described in claim 5, characterized in that, A sealing gasket is also installed between the hopper and the channel section. The sealing gasket has multiple perforations that connect to the corresponding discharge hole and flow channel hole.

7. The blade coating mechanism as described in claim 6, characterized in that, The hopper is also recessed with a connecting groove, and the connecting part is inserted into the connecting groove and connected to the hopper through a connector.

8. The blade coating mechanism as described in claim 5, characterized in that, The scraper is tilted, with the connecting part located on the higher side.

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