Paper coating device

Abstract

The utility model belongs to the technical field of paper manufacturing, and particularly relates to a paper coating device which comprises a machine base, and a liquid containing groove, a transfer roller, a first rubber roller, a second rubber roller and a first height adjusting assembly are arranged on the machine base. The liquid containing tank is used for containing coating liquid; the transfer roller is rotationally arranged above the liquid containing tank, and the lower part of the transfer roller is immersed in the coating liquid in the liquid containing tank; the first rubber roller is arranged above the transfer roller and is attached to the peripheral surface of the transfer roller; the second rubber roller is arranged above the first rubber roller, and a paper passing gap is formed between the second rubber roller and the first rubber roller and allows paper to pass through; the first height adjusting assembly is used for adjusting the vertical distance between the liquid containing tank and the transfer roller. The vertical distance between the liquid containing groove and the transfer roller is adjusted through the first height adjusting assembly, so that the height of the transfer roller immersed in liquid in the liquid containing groove basically meets the requirement, the height is not too large or too small, and waste is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to paper manufacturing technical field, especially relate to a paper coating device. BACKGROUND

[0002] Coating is a method of applying paste-like polymers, molten polymers or polymer melts onto substrates such as paper, cloth, plastic film, etc. to produce composite materials (films). When this method is applied to paper, it forms coated paper.

[0003] The main purpose of paper coating is to improve the surface properties of paper, making it have better optical properties, printing performance and other special properties. For example, coated paper can be used for printing magazines, books and other publishing papers, as well as trademarks, packaging, commodity catalogs and other printing papers. Through coating, paper can obtain higher whiteness, gloss and smoothness, thereby improving the quality and visual effect of printed matter.

[0004] During the paper coating process, a coating device is needed. Usually, an automatic coating equipment with publication number CN118454977A is used. The positional relationship between the coating roller and the liquid holding plate is fixed, and the depth of the coating roller immersed in the liquid in the liquid holding plate cannot be adjusted. If the coating roller is immersed too much in the liquid in the liquid holding plate, too much liquid will be absorbed into the coating roller from both ends of the coating roller, causing waste. If the distance between the coating roller and the bottom surface of the liquid holding plate is large, the coating roller can be immersed less in the liquid in the liquid holding plate, but when there is still a small amount of liquid left in the liquid holding plate that needs to be used as much as possible, the coating roller cannot dip the liquid in the liquid holding plate, and the liquid in the liquid holding plate can only be poured out, which also causes waste. SUMMARY

[0005] The utility model aims at the above-mentioned technical problem, provides a kind of paper coating device, to the effect of reducing waste.

[0006] Therefore, the utility model provides a kind of paper coating device, which includes base, and base is provided with:

[0007] Liquid holding tank, the liquid holding tank is used to hold coating liquid;

[0008] Transfer roller, the transfer roller is rotationally arranged above the liquid holding tank, and the lower part of the transfer roller is immersed in the coating liquid in the liquid holding tank;

[0009] First rubber roller, the first rubber roller is arranged above the transfer roller and attached to the outer periphery of the transfer roller;

[0010] Second rubber roller, the second rubber roller is arranged above the first rubber roller, and a paper passing gap is provided between the second rubber roller and the first rubber roller to allow the paper to pass;

[0011] A first height adjusting assembly is arranged to adjust the vertical distance between the liquid tank and the transfer roller.

[0012] In the technical solution, the first height adjusting assembly is arranged to adjust the vertical distance between the liquid tank and the transfer roller. When the liquid in the liquid tank is relatively much, the first height adjusting assembly is arranged to make the liquid tank far from the transfer roller, so that the coating roller is not excessively immersed in the liquid in the liquid tank. When the liquid in the liquid tank is relatively little and needs to be used as much as possible, the first height adjusting assembly is arranged to make the liquid tank close to the transfer roller, so that the coating roller can dip the liquid in the liquid tank during rotation, and the height of the transfer roller immersed in the liquid in the liquid tank can basically meet the requirement, and the liquid is not excessively much or little, thereby reducing waste.

[0013] Further, the first height adjusting assembly comprises:

[0014] A regulating hand wheel is arranged to rotate on the side of the machine base, and a worm is connected to the end of the regulating hand wheel,

[0015] A first regulating seat is fixedly connected to the machine base and arranged below the liquid tank, a regulating shaft is arranged to rotate on the first regulating seat, a worm wheel and a regulating gear are fixedly connected to the regulating shaft, and the worm wheel is arranged to mesh with the worm.

[0016] A regulating rack is arranged to slide on the first regulating seat and fixedly connected to the bottom of the liquid tank, and the liquid tank is arranged to slide on the machine base. The regulating rack is arranged to mesh with the regulating gear.

[0017] In the technical solution, when the distance between the liquid tank and the transfer roller needs to be adjusted, the regulating hand wheel is rotated to drive the worm to rotate the worm wheel, so that the regulating shaft synchronously rotates with the regulating gear, and the regulating rack drives the liquid tank to ascend or descend on the machine base to approach or move away from the liquid tank.

[0018] Further, a second height adjusting assembly is arranged on the machine base, and the second height adjusting assembly is arranged to adjust the width of the paper passing gap.

[0019] In the technical solution, the width of the paper passing gap is adjusted to meet the coating of paper with different thicknesses.

[0020] Further, the second height adjusting assembly comprises a regulating air cylinder, the regulating air cylinder is fixedly arranged on the machine base, the second rubber roller is arranged to rotate in two sliders respectively, the sliders are arranged to slide in the machine base, and the regulating air cylinder has two air cylinders. The two air cylinder rods are connected to the two sliders to drive the second rubber roller to approach or move away from the first rubber roller.

[0021] Further, a stirring assembly is arranged between the bottom of the liquid tank and the transfer roller, and the stirring assembly is arranged to stir the liquid in the liquid tank.

[0022] Further, the liquid tank is provided with a sandwich layer including a heating resistance wire.

[0023] In the technical solution, the heating resistance wire is used to heat and keep warm the liquid in the liquid tank, preventing the liquid from condensing.

[0024] Further, the stirring assembly includes:

[0025] The stirring rod is arranged along the length direction of the liquid tank, and a plurality of arc-shaped rods are arranged along the length direction of the stirring rod.

[0026] The power assembly is used to drive the stirring rod to reciprocate along the length direction of the liquid tank.

[0027] In the technical solution, the transfer roller stirs the liquid in the liquid tank in the rotating direction during the process of rotating and dipping the liquid in the liquid tank, forming a stirring effect. By arranging the stirring rod capable of reciprocating along the length direction of the liquid tank between the bottom of the liquid tank and the transfer roller, the liquid can be stirred in another direction, preventing the liquid from condensing.

[0028] Further, the power assembly includes:

[0029] The fixed seat is fixedly arranged on the side wall of the end portion of the liquid tank, the fixed seat is provided with a guide protrusion, the guide protrusion is provided with a first guide hole along the axis direction of the fixed seat, a sliding rod is slidingly arranged in the first guide hole, the guide protrusion is provided with a second guide hole perpendicular to the axis direction of the fixed seat, the circumferential wall of the fixed seat is further provided with a gap notch, the sliding rod is provided with an inclined guide groove, the lower end portion of the sliding rod is vertically connected with an extension rod, and the extension rod is connected with the stirring rod.

[0030] The sliding cover is slidingly arranged on the inner wall of the fixed seat, the circumferential wall of the sliding cover is inwardly protruded with two opposite first inclined surfaces, and the inner wall of the sliding cover is connected with the top end of the sliding rod through a return spring.

[0031] The special-shaped block is slidingly arranged in the second guide hole, the two ends of the special-shaped block are provided with second inclined surfaces matched with the first inclined surfaces, and the middle portion of the special-shaped block is sleeved in the guide groove and matched with the shape of the guide groove.

[0032] The trigger protrusion is arranged on the end portion of the transfer roller, and the trigger protrusion can press the sliding cover during the circumferential rotation of the transfer roller.

[0033] In this technical solution, the transfer roller rotates circumferentially. When the triggering protrusion rotates to the sliding cover, it squeezes the sliding cover, causing it to slide into the fixed seat. This causes the first inclined surface to squeeze the second inclined surface of the irregular block, thereby causing the irregular block to move laterally. Under the action of the inclined guide groove, the sliding rod moves upward, driving the stirring rod to move. Then, after the triggering protrusion rotates away, the sliding cover resets, and the stirring rod resets. This process repeats, and the rotation of the transfer roller provides a power source for stirring, saving energy.

[0034] Furthermore, a scraper is also provided on the base.

[0035] Furthermore, the coating method of the coating apparatus includes the following steps:

[0036] S1: Adjustment, adjust the distance of the paper feed gap, and lay out the paper;

[0037] S2: Coating. The transfer roller rotates to pick up the liquid in the liquid tank and transfer it into the transfer roller. The transfer roller transfers the liquid to the first adhesive roller. The first adhesive roller coats the liquid onto the paper in the paper feed gap. The rotation of the transfer roller drives the stirring assembly to move back and forth along the length of the liquid tank and stir.

[0038] The beneficial effects of this utility model are:

[0039] 1. The vertical distance between the liquid tank and the transfer roller is adjusted by the first height adjustment component. When there is a lot of liquid in the liquid tank, the first height adjustment component makes the liquid tank farther away from the transfer roller, so that the coating roller will not be immersed in the liquid in the liquid tank too much. When there is only a small amount of liquid left in the liquid tank and it needs to be used up as much as possible, the first height adjustment component makes the liquid tank closer to the transfer roller, so that the coating roller can pick up the liquid in the liquid tank during rotation. This ensures that the height of the transfer roller immersed in the liquid in the liquid tank basically meets the requirements, neither too much nor too little, thus reducing waste.

[0040] 2. Adjust the width of the paper feed gap to meet the coating requirements of paper of different thicknesses.

[0041] 3. During the process of the transfer roller rotating and dipping into the liquid in the liquid tank, it will stir the liquid in the liquid tank in the direction of rotation, creating a stirring effect. By setting a stirring rod that can move back and forth along the length of the liquid tank between the bottom of the liquid tank and the transfer roller, the liquid can be stirred in another direction to prevent the liquid from condensing. The rotation of the transfer roller provides a power source for stirring, saving energy. Attached Figure Description

[0042] Figure 1 This is a perspective view of the present invention;

[0043] Figure 2 This is a cross-sectional view of the present invention;

[0044] Figure 3 is a schematic view of the stirring assembly and the transfer roller;

[0045] Figure 4 is Figure 3 is a partial enlarged view at A in FIG. 1;

[0046] Figure 5 is a perspective view of the stirring assembly;

[0047] Figure 6 is a sectional view of the power assembly;

[0048] Figure 7 is a sectional view of the stirring rod;

[0049] Figure 8 is a sectional view of the fixing seat.

[0050] The reference signs in the drawings represent:

[0051] 1, base; 2, liquid tank; 3, transfer roller; 4, first rubber roller; 5, second rubber roller; 6, scraper; 7, adjusting hand wheel; 8, worm; 9, first adjusting seat; 10, adjusting shaft; 11, turbine; 12, adjusting gear; 13, adjusting rack; 14, adjusting cylinder; 15, sliding block; 16, interlayer; 17, stirring rod; 18, arc-shaped rod; 19, fixing seat; 20, guide protrusion; 21, first guide hole; 22, sliding rod; 23, second guide hole; 24, clearance notch; 25, guide groove; 26, extension rod; 27, sliding cover; 28, first inclined surface; 29, return spring; 30, special-shaped block; 31, second inclined surface; 32, trigger protrusion. DETAILED DESCRIPTION

[0052] The technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art belong to the scope of protection of the present application.

[0053] In the description of the present application, it should be noted that the terms used herein are merely for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. For the purpose of description, the dimensions of the various parts shown in the drawings are not drawn to scale. The techniques, methods, and devices known to those of ordinary skill in the relevant art can not be discussed in detail, but should be considered part of the specification when appropriate. In all examples shown and discussed herein, any specific value should be interpreted as merely exemplary and not as a limitation. Thus, other examples of the exemplary embodiments can have different values. It should be noted that like reference numerals and letters refer to like items in the following drawings, and thus, once an item is defined in one drawing, it need not be discussed further in subsequent drawings.

[0054] It should be noted that the terms "first", "second", and the like in the description and claims of the present application are used for distinguishing between similar objects and are not necessarily used to describe a particular sequential or chronological order. It is to be understood that the use of the terms so construed can interchange, and that "first", "second", and the like can be understood as a "one of" a group or a class, and that the objects so designated are not limited to the number of two unless otherwise specified. Furthermore, the term "and / or" means at least one of the connected objects, and the character " / " generally means an "or" relationship between the associated objects.

[0055] It should be noted that in the description of the present application, the orientation or position relationship indicated by the terms such as "front, back, top, bottom, left, right", "horizontal, vertical, perpendicular, horizontal", and "top, bottom" is generally based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the present application and simplifying the description. Without the opposite indication, these orientation terms do not indicate or imply that the devices or elements referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be understood as limiting the scope of protection of the present application. The orientation terms "inner, outer" refer to the inner and outer relative to the contour of the components themselves.

[0056] It should be noted that, in this application, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes that element. Furthermore, it should be noted that the scope of the methods and apparatuses in the embodiments of this application is not limited to performing functions in the order shown or discussed, but may also include performing functions substantially simultaneously or in the reverse order, depending on the functions involved. For example, the described methods may be performed in a different order than described, and various steps may be added, omitted, or combined. Additionally, features described with reference to certain examples may be combined in other examples.

[0057] Example 1

[0058] like Figures 1-2 As shown, a paper coating apparatus includes a base 1, on which:

[0059] Liquid holding tank 2, the liquid holding tank 2 being used to hold coating liquid;

[0060] Transfer roller 3 is rotatably mounted above liquid tank 2, with its lower part immersed in coating liquid in liquid tank 2;

[0061] The first rubber roller 4 is disposed above the transfer roller 3 and is in contact with the outer peripheral surface of the transfer roller 3;

[0062] The second rubber roller 5 is disposed above the first rubber roller 4, and a paper-passing gap is provided between the second rubber roller 5 and the first rubber roller 4 to allow paper to pass through;

[0063] A first height adjustment component is used to adjust the vertical distance between the liquid tank 2 and the transfer roller 3. A scraper 6 is also provided on the base 1.

[0064] The vertical distance between the liquid tank 2 and the transfer roller 3 is adjusted by the first height adjustment component. When there is a lot of liquid in the liquid tank 2, the first height adjustment component makes the liquid tank 2 farther away from the transfer roller 3, so that the coating roller will not be immersed too much in the liquid in the liquid tank. When there is only a small amount of liquid left in the liquid tank and it needs to be used up as much as possible, the first height adjustment component makes the liquid tank 2 closer to the transfer roller 3, so that the coating roller can pick up the liquid in the liquid tank during rotation. This ensures that the height of the transfer roller 3 immersed in the liquid in the liquid tank 2 basically meets the requirements, neither too much nor too little, thus reducing waste.

[0065] The first height adjustment component includes:

[0066] An adjusting handwheel 7 is rotatably mounted on the side of the machine base 1, and a worm gear 8 is connected to the end of the adjusting handwheel 7.

[0067] First adjusting seat 9, the first adjusting seat 9 is fixedly connected to the machine base 1 and is located below the liquid tank 2. An adjusting shaft 10 is rotatably arranged on the first adjusting seat 9. A turbine 11 and an adjusting gear 12 are sleeved and fixedly connected on the adjusting shaft 10. The turbine 11 meshes with the worm 8.

[0068] Adjusting rack 13 is slidably mounted on the first adjusting seat 9 and fixedly connected to the bottom of the liquid holding tank 2. The liquid holding tank 2 is slidably mounted on the machine base 1. The adjusting rack 13 meshes with the adjusting gear 12.

[0069] When it is necessary to adjust the distance between the liquid tank 2 and the transfer roller 3, turn the adjusting handwheel 7 to make the worm gear 8 drive the turbine 11 to rotate, so that the adjusting shaft 10 drives the adjusting gear 12 to rotate synchronously, so that the adjusting rack 13 carries the liquid tank 2 up and down on the machine base 1 to move closer to or away from the liquid tank 2.

[0070] Example 2

[0071] like Figures 1-2 As shown, a second height adjustment component is provided on the base 1, which is used to adjust the width of the paper feed gap. Adjusting the width of the paper feed gap allows for coating of papers of different thicknesses.

[0072] The second height adjustment assembly includes an adjustment cylinder 14, which is fixedly mounted on the machine base 1. The two ends of the second rubber roller 5 are respectively rotatably mounted in two sliders 15, which are slidably mounted in the machine base 1. There are two adjustment cylinders 14, and the piston rods of the two adjustment cylinders 14 are respectively connected to the two sliders 15 to drive the second rubber roller 5 to move closer to or away from the first rubber roller 4.

[0073] Example 3

[0074] like Figures 3-8 As shown, the liquid-holding tank 2 is equipped with a stirring assembly located between the bottom of the tank 2 and the transfer roller 3. The stirring assembly is used to stir the liquid in the liquid-holding tank 2. The liquid-holding tank 2 is provided with a jacket 16 including a heating resistance wire. The heating resistance wire heats and keeps the liquid in the liquid-holding tank 2 at a constant temperature to prevent the liquid from condensing.

[0075] The stirring assembly includes:

[0076] A stirring rod 17 is arranged along the length of the liquid tank 2, and a plurality of arc-shaped rods 18 are arranged on the stirring rod 17 along the length.

[0077] A power assembly is arranged to drive the stirring rod 17 to reciprocate along the length direction of the liquid tank 2.

[0078] During the rotation of the transfer roller 3 to dip the liquid in the liquid tank 2, the liquid in the liquid tank 2 is stirred in the rotation direction to form a stirring effect. By arranging the stirring rod 17 to reciprocate along the length direction of the liquid tank 2 between the bottom of the liquid tank 2 and the transfer roller 3, the liquid can be stirred in another direction to prevent the liquid from condensing.

[0079] The power assembly comprises:

[0080] A fixed seat 19 is fixedly arranged on the side wall of the end of the liquid tank 2. A guide protrusion 20 is arranged in the fixed seat 19. A first guide hole 21 is arranged on the guide protrusion 20 along the axis direction of the fixed seat 19. A sliding rod 22 is slidably arranged in the first guide hole 21. A second guide hole 23 is arranged on the guide protrusion 20 perpendicularly to the axis direction of the fixed seat 19. An accommodation gap 24 is further arranged on the peripheral wall of the fixed seat 19. An inclined guide groove 25 is arranged on the sliding rod 22. An extension rod 26 is perpendicularly connected to the lower end of the sliding rod 22. The extension rod 26 is arranged to pass through the accommodation gap 24 and is fixedly connected to the stirring rod 17.

[0081] A sliding cover 27 is slidably arranged on the inner wall of the fixed seat 19. Two opposite first inclined surfaces 28 are protruded inwardly from the peripheral wall of the sliding cover 27. A return spring 29 is connected between the inner wall of the sliding cover 27 and the top end of the sliding rod 22.

[0082] A special-shaped block 30 is slidably arranged in the second guide hole 23. Second inclined surfaces 31 are arranged on the two ends of the special-shaped block 30 and match the first inclined surfaces 28. The special-shaped block 30 is sleeved in the guide groove 25 and matches the shape of the guide groove 25.

[0083] A trigger protrusion 32 is arranged on the end of the transfer roller 3. The trigger protrusion 32 can press the sliding cover 27 during the circumferential rotation of the transfer roller 3.

[0084] During the circumferential rotation of the transfer roller 3, the trigger protrusion 32 is rotated to the sliding cover 27 to press the sliding cover 27 to slide inwardly in the fixed seat 19. The first inclined surfaces 28 press the second inclined surfaces 31 of the special-shaped block 30 to make the special-shaped block 30 move transversely. Under the action of the inclined guide groove 25, the sliding rod 22 moves upwardly to drive the stirring rod 17 to move. After the trigger protrusion 32 rotates away, the sliding cover 27 is reset, and the stirring rod 17 is reset. Through the rotation of the transfer roller 3, the power source for stirring is provided, and the energy is saved.

[0085] The coating method of the coating device comprises the following steps:

[0086] S1: adjusting, adjusting the distance of the paper passing gap, laying paper;

[0087] S2: coating, the transfer roller 3 rotates to dip the liquid in the liquid tank 2 into the transfer roller 3, the transfer roller 3 transfers the liquid to the first rubber roller 4, the first rubber roller 4 coats the liquid onto the paper in the paper passing gap, and the transfer roller 3 rotates to drive the stirring assembly to stir along the length direction of the liquid tank 2.

[0088] The embodiments of the application are described above in combination with the drawings, the embodiments in the application and the features in the embodiments can be combined with each other without conflict, the application is not limited to the above specific embodiments, the above specific embodiments are only illustrative but not restrictive, and those skilled in the art can make many forms under the inspiration of the application without departing from the scope of the application and the protection scope of the claims.

Claims

1. A paper coating apparatus characterized by comprising: The machine base (1) is provided with: A liquid tank (2) for holding the coating liquid; A transfer roller (3) rotatably arranged above the liquid tank (2), the lower part of the transfer roller (3) being immersed in the coating liquid in the liquid tank (2); A first rubber roller (4) arranged above the transfer roller (3) and attached to the outer periphery of the transfer roller (3); A second rubber roller (5) arranged above the first rubber roller (4), with a paper passing gap between the first rubber roller (4) and the second rubber roller (5) to allow the paper to pass through; A first height adjustment assembly for adjusting the vertical distance between the liquid tank (2) and the transfer roller (3).

2. A paper coating apparatus according to claim 1, wherein The first height adjustment assembly comprises: An adjustment hand wheel (7) rotatably arranged on the side of the machine base (1), with a worm (8) connected to the end of the adjustment hand wheel (7), A first adjustment seat (9) fixedly connected to the machine base (1) and arranged below the liquid tank (2), with an adjustment shaft (10) rotatably arranged on the first adjustment seat (9), a turbine (11) and an adjustment gear (12) being sleeved and fixedly connected to the adjustment shaft (10), and the turbine (11) being in meshing engagement with the worm (8); An adjustment rack (13) slidably arranged on the first adjustment seat (9) and fixedly connected to the bottom of the liquid tank (2), the liquid tank (2) being slidably arranged on the machine base (1), and the adjustment rack (13) being in meshing engagement with the adjustment gear (12).

3. A paper coating apparatus according to claim 1, wherein The machine base (1) is provided with a second height adjustment assembly for adjusting the width of the paper passing gap.

4. A paper coating apparatus according to claim 3, wherein The second height adjustment assembly comprises an adjustment air cylinder (14) fixedly arranged on the machine base (1), the second rubber roller (5) being rotatably arranged in two sliding blocks (15) at both ends, the sliding blocks (15) being slidably arranged in the machine base (1), and there being two adjustment air cylinders (14), the piston rods of the two adjustment air cylinders (14) being connected to the two sliding blocks (15) for driving the second rubber roller (5) to move closer to or away from the first rubber roller (4).

5. A paper coating apparatus according to claim 1, wherein The liquid tank (2) is provided with a stirring assembly between the tank bottom and the transfer roller (3), the stirring assembly being used for stirring the liquid in the liquid tank (2).

6. A paper coating apparatus according to claim 1, wherein The liquid tank (2) is provided with a sandwich layer (16) comprising a heating resistance wire.

7. A paper coating apparatus according to claim 5, wherein The stirring assembly comprises: A stirring rod (17) arranged along the length direction of the liquid tank (2), with a plurality of arc-shaped rods (18) arranged along the length direction on the stirring rod (17); A power assembly for driving the stirring rod (17) to move back and forth along the length direction of the liquid tank (2).

8. A paper coating apparatus according to claim 7, wherein The power assembly comprises: The fixed seat (19) is fixedly arranged on the end side wall of the liquid containing groove (2), a guide lug (20) is arranged in the fixed seat (19), a first guide hole (21) is formed on the guide lug (20) along the axis direction of the fixed seat (19), a sliding rod (22) is slidably arranged in the first guide hole (21), a second guide hole (23) is formed on the guide lug (20) perpendicularly to the axis direction of the fixed seat (19), a displacement notch (24) is further formed on the peripheral wall of the fixed seat (19), a guide groove (25) is formed on the sliding rod (22) in an inclined manner, an extension rod (26) is vertically connected to the lower end of the sliding rod (22), and the extension rod (26) is connected with the stirring rod (17) and extends out of the displacement notch (24); The sliding cover (27) is slidably arranged on the inner wall of the fixed seat (19), two opposite first inclined surfaces (28) are protruded inwardly from the peripheral walls on both sides of the sliding cover (27), and a return spring (29) is connected between the inner wall of the sliding cover (27) and the top end of the sliding rod (22); The special-shaped block (30) is slidably arranged in the second guide hole (23), the two ends of the special-shaped block (30) are provided with second inclined surfaces (31) matched with the first inclined surfaces (28), and the middle part of the special-shaped block (30) is sleeved in the guide groove (25) and matched with the shape of the guide groove (25); The trigger lug (32) is arranged at the end of the transfer roller (3), and the trigger lug (32) can press the sliding cover (27) during the circumferential rotation of the transfer roller (3).

9. A paper coating apparatus according to claim 1, wherein The machine base (1) is further provided with a scraper (6).

Images