Sizing device and sizing machine

By setting multiple extrusion areas of sizing rollers, prepress rollers and high-pressure rollers in the sizing device, the spray pipe is cancelled to achieve uniform sizing of yarns, solving the yarn breakage problem caused by slurry skin drop, and improving production efficiency and product quality.

CN223281041UActive Publication Date: 2025-08-29HI TECH HEAVY INDUSTRY CO LTD
View PDF 0 Cites 0 Cited by

Patent Information

Application Number
CN202422606128.4
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-10-28
Publication Date
2025-08-29
Estimated Expiration
2034-10-28

AI Technical Summary

Technical Problem

In the existing three-immersion, three-pressure and four-roll sizing device, the spray port of the spray pipe is prone to slurry, and the slurry/slag is prone to fall on the yarn, causing the yarn to break and affect subsequent weaving.

Method used

The sizing roller, the first prepressing roller, the second prepressing roller and the high-pressing roller are arranged in parallel to form an extrusion area. The yarn is impregnated and pressed and rolled multiple times, and the spray pipe structure is cancelled, and the slurry in the slurry tank is used to achieve uniform slurry.

Benefits of technology

Effectively prevent the formation of slurry or sludge, ensure uniform adhesion of slurry, reduce yarn breaks, and improve production efficiency and product quality.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN223281041U_ABST
    Figure CN223281041U_ABST
Patent Text Reader

Abstract

The utility model provides a sizing device and a sizing machine, and relates to the technical field of textile instruments. The sizing device comprises a sizing roller, a first pre-pressing roller, a second pre-pressing roller, a high-pressure roller and a size tank, the sizing roller, the first pre-pressing roller, the second pre-pressing roller and the high-pressure roller are arranged in parallel, and the first pre-pressing roller, the second pre-pressing roller and the high-pressure roller are arranged at intervals in the circumferential direction of the sizing roller. Extrusion areas are respectively formed between the first pre-pressing roller, the second pre-pressing roller and the sizing roller and between the high-pressure roller and the sizing roller; and at least three of the sizing roller, the first pre-pressing roller, the second pre-pressing roller and the high-pressure roller are soaked in the slurry in the slurry tank. According to the device, a spraying pipe structure is omitted, the sizing roller, the first pre-pressing roller, the second pre-pressing roller and the high-pressure roller are matched with the size tank, so that the yarn can be immersed in size, the purpose of spraying the size is achieved, and formation of size leather or size residues can be effectively prevented.
Need to check novelty before this filing date? Find Prior Art

Description

Technical Field

[0001] The present application relates to the technical field of textile machinery, and in particular to a sizing device and a sizing machine. Background Art

[0002] Typically, a three-dip, three-press, four-roller sizing system sprays sizing liquid onto the yarn through a spray pipe to achieve sizing. However, in actual use, sizing film is easily formed at the spray nozzle of the spray pipe. The sizing film / residue easily falls on the yarn and sticks to the yarn sheet during squeezing. After the yarn sheet reaches the dry area, the yarn separation process is prone to yarn breakage, which in turn affects subsequent weaving. Utility Model Content

[0003] In view of this, the purpose of this application is to overcome the deficiencies in the prior art and to provide a sizing device and a sizing machine that can solve the problem of yarn breakage caused by sizing / residue easily falling onto the yarn.

[0004] This application provides the following technical solutions:

[0005] In the first aspect, an embodiment of the present application provides a sizing device, which includes a sizing roller, a first pre-pressing roller, a second pre-pressing roller, a high-pressure roller and a sizing tank, wherein the sizing roller, the first pre-pressing roller, the second pre-pressing roller and the high-pressure roller are arranged in parallel, the first pre-pressing roller, the second pre-pressing roller and the high-pressure roller are arranged at intervals along the circumference of the sizing roller, and the first pre-pressing roller, the second pre-pressing roller and the high-pressure roller respectively form an extrusion area between the sizing roller; wherein at least three of the sizing roller, the first pre-pressing roller, the second pre-pressing roller and the high-pressure roller are immersed in the slurry in the slurry tank.

[0006] In some embodiments of the first aspect, the first pre-pressing roller and the second pre-pressing roller are respectively located on both sides of a vertical plane where the axis of the sizing roller is located.

[0007] In some embodiments of the first aspect, the first pre-pressing roller and the second pre-pressing roller are symmetrically arranged with respect to a vertical plane where the axis of the sizing roller is located.

[0008] In some embodiments of the first aspect, the size tank includes a first size tank, and the size application roller, the first pre-pressing roller, and the second pre-pressing roller are partially immersed in the size liquid in the first size tank.

[0009] In some embodiments of the first aspect, the size tank further includes a second size tank, and the high-pressure roller is partially immersed in the second size tank.

[0010] In some embodiments of the first aspect, the slot opening of the first slurry tank and / or the slot opening of the second slurry tank are flared.

[0011] In some embodiments of the first aspect, at least one of the sizing roller, the first pre-pressing roller, and the second pre-pressing roller is close to the bottom of the first sizing tank.

[0012] In some embodiments of the first aspect, the sizing device further comprises a yarn guide roller, which is located upstream of the first pre-pressing roller in the direction of yarn movement, and the first pre-pressing roller is located between the yarn guide roller and the sizing roller.

[0013] In some embodiments of the first aspect, the diameter of the first pre-pressing roller, the diameter of the second pre-pressing roller, and the diameter of the high-pressure roller are all smaller than the diameter of the sizing roller.

[0014] In a second aspect, the present application further provides a sizing machine, which includes a sizing device as described in any one of the above embodiments.

[0015] The embodiments of the present application have the following advantages:

[0016] The present application provides a sizing device, in which slurry is contained in a slurry tank, and a sizing roller rotates in the slurry tank to bring the slurry to the yarn. The yarn passes through the squeezing area between the sizing roller and the first pre-pressing roller for the first dipping and rolling. The yarn continues to pass through the squeezing area between the second pre-pressing roller and the sizing roller for the second dipping and rolling. Finally, the yarn passes through the squeezing area between the high-pressure roller and the sizing roller for the third dipping and rolling. Furthermore, through multiple dipping and rolling, it is ensured that the slurry can be evenly attached to the yarn, and the excess slurry is removed. During the entire sizing process, the spray pipe structure is eliminated, and the sizing roller, the first pre-pressing roller, the second pre-pressing roller and the high-pressure roller are used in conjunction with the slurry tank, so that the yarn can be immersed in the slurry to achieve the purpose of spraying the slurry, which can effectively prevent the formation of slurry skin or slurry residue.

[0017] The present application also relates to a sizing machine. Since the above-mentioned sizing device has the above-mentioned technical effects, the sizing machine including the sizing device should have the same technical effects, which will not be repeated here.

[0018] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without creative work.

[0020] Figure 1 A schematic structural diagram of a sizing device provided in an embodiment of the present application is shown.

[0021] Description of main component symbols:

[0022] 100-yarn; 200-yarn guide roller; 300-first pre-pressing roller; 400-sizing roller; 500-high-pressure roller; 600-second pre-pressing roller; 700-first sizing tank. DETAILED DESCRIPTION

[0023] The following describes in detail embodiments of the present application. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present application and are not to be construed as limiting the present application.

[0024] It should be noted that when an element is referred to as being "fixed to" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. Conversely, when an element is referred to as being "directly on" another element, there is no intermediate element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only.

[0025] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0026] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0027] Unless otherwise defined, all technical and scientific terms used herein have the same meanings as commonly understood by those skilled in the art to which this application belongs. The terms used in the template description herein are for the purpose of describing specific embodiments only and are not intended to limit this application. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0028] In related technologies, the three-dip, three-press, four-roller sizing device is the main component of the sizing machine. The "three-dip, three-press" refers to the three-repetition of dipping and pressing operations during the sizing process, while the "four-roll" refers to the fact that the device contains four rollers. This device is used in the textile industry to improve the quality and performance of yarns. Through multiple dipping and pressing, it ensures that the sizing material can be evenly attached to the yarn. At the same time, through the cooperation of the four rollers, the yarn can be effectively processed and finished. This device is designed to optimize the structure of the yarn and enhance the strength and durability of the yarn to meet the needs of different textile products.

[0029] Typically, a three-dip, three-press, four-roller sizing system sprays sizing liquid onto the yarn through a spray pipe to achieve sizing. However, in actual use, sizing film is easily formed at the spray nozzle of the spray pipe. The sizing film / residue easily falls on the yarn and sticks to the yarn sheet during squeezing. After the yarn sheet reaches the dry area, the yarn separation process is prone to yarn breakage, which in turn affects subsequent weaving.

[0030] As shown in Figure 1, in order to solve the above-mentioned technical problems, an embodiment of the present application provides a sizing device, which includes a sizing roller 400, a first pre-pressing roller 300, a second pre-pressing roller 600, a high-pressure roller 500 and a slurry tank. The sizing roller 400, the first pre-pressing roller 300, the second pre-pressing roller 600 and the high-pressure roller 500 are arranged in parallel, and the first pre-pressing roller 300, the second pre-pressing roller 600 and the high-pressure roller 500 are arranged at intervals along the circumference of the sizing roller 400, and the first pre-pressing roller 300, the second pre-pressing roller 600 and the high-pressure roller 500 respectively form an extrusion area between the sizing roller 400; wherein, at least three of the sizing roller 400, the first pre-pressing roller 300, the second pre-pressing roller 600 and the high-pressure roller 500 are immersed in the slurry in the slurry tank.

[0031] In these embodiments, the sizing roller 400, the first pre-pressing roller 300, the second pre-pressing roller 600, and the high-pressure roller 500 are rotatably mounted on the frame to ensure that they can all rotate. The sizing tank contains sizing liquid, and the sizing roller 400 rotates in the sizing tank to bring the sizing liquid to the yarn 100.

[0032] During operation, the yarn 100 passes through the squeezing area between the sizing roller 400 and the first pre-pressing roller 300 for the first dipping and rolling. The yarn 100 continues to pass through the squeezing area between the second pre-pressing roller 600 and the sizing roller 400 for the second dipping and rolling. Finally, the yarn 100 passes through the squeezing area between the high-pressure roller 500 and the sizing roller 400 for the third dipping and rolling. Furthermore, through multiple dipping and rolling, it is ensured that the slurry can be evenly attached to the yarn 100, and the excess slurry is removed. During the entire sizing process, the spray pipe structure is eliminated, and the sizing roller 400, the first pre-pressing roller 300, the second pre-pressing roller 600 and the high-pressure roller 500 are used in conjunction with the slurry tank, so that the yarn 100 can be immersed in the slurry to achieve the purpose of spraying the slurry, which can effectively prevent the formation of slurry skin or slurry residue.

[0033] It should be noted that the squeeze area between each pre-pressing roller and the sizing roller 400 is designed very precisely to ensure that the size can be evenly distributed on the yarn 100. The precise squeeze area design ensures that the size is evenly distributed on the yarn 100 and reduces the generation of size skin.

[0034] Clearly, optimizing the structural design of the sizing device simplifies the complexity of the equipment, improves production efficiency, and reduces costs. Furthermore, the elimination of the spray pipe increases the operable space between the first pre-pressing roller 300, the second pre-pressing roller 600, and the high-pressure roller 500, respectively, and the sizing roller 400. This facilitates handling of the pre-pressing rollers in the event of yarn 100 breakage, thereby improving production efficiency.

[0035] For example, in this embodiment, the sizing roller 400, the first pre-pressing roller 300, and the second pre-pressing roller 600 are immersed in the slurry in the slurry tank. Of course, in other embodiments, the sizing roller 400, the first pre-pressing roller 300, and the high-pressure roller 500 are immersed. Alternatively, the first pre-pressing roller 300, the second pre-pressing roller 600, and the high-pressure roller 500 are immersed, and so on, without specific limitation.

[0036] As shown in FIG. 1 , in some embodiments, the first pre-pressing roller 300 and the second pre-pressing roller 600 are respectively located on both sides of a vertical plane where the axis of the sizing roller 400 is located.

[0037] In these embodiments, the first pre-pressing roller 300 and the second pre-pressing roller 600 are respectively located on both sides of the vertical plane where the axis of the sizing roller 400 is located. Such a layout design helps to achieve a more uniform sizing distribution and can better control the sizing process of the yarn 100.

[0038] The first pre-pressing roller 300 and the second pre-pressing roller 600 are located on both sides of the sizing roller 400, which can provide a symmetrical pressure distribution, which means that the yarn 100 can be evenly stressed in two directions when passing through the two pre-pressing rollers, which helps to eliminate the unevenness caused by unilateral pressure.

[0039] By applying pre-pressure from both sides, it is possible to ensure that the size is distributed more evenly on the yarn 100, reducing the phenomenon of local excessive thickness or thinness, which is very important for ensuring the quality of the final product.

[0040] Double-sided pre-pressing can also help accelerate the sizing process, allowing the yarn 100 to absorb the sizing more quickly, improving the efficiency of the entire sizing process. When the pre-pressing rollers are located on both sides of the sizing roller 400, the possibility of the yarn 100 being entangled when passing through the equipment can be reduced, thereby further reducing the damage to the yarn 100.

[0041] In addition, this design layout facilitates the immersion of the lower parts of the first pre-pressing roller 300, the second pre-pressing roller 600 and the sizing roller 400 into the sizing tank.

[0042] As shown in FIG. 1 , in some embodiments, the first pre-pressing roller 300 and the second pre-pressing roller 600 are symmetrically arranged with respect to a vertical plane where the axis of the sizing roller 400 is located.

[0043] In these embodiments, the first pre-pressing roller 300 and the second pre-pressing roller 600 are symmetrically arranged with respect to the vertical plane where the axis of the sizing roller 400 is located. The symmetrically arranged first pre-pressing roller 300 and the second pre-pressing roller 600 can apply uniform pressure on both sides of the yarn 100, thereby ensuring that the slurry is more evenly distributed on both sides of the yarn 100, and reducing the situation where there is too much slurry on one side and too little on the other side.

[0044] By arranging the pre-pressing rollers symmetrically in the vertical plane, the deviation of the yarn 100 when passing through the sizing device can be reduced, ensuring that the yarn 100 can pass through each roller smoothly, and reducing the problem of the yarn 100 deviating due to asymmetric pressure.

[0045] The symmetrical arrangement can increase the stability of the system, making the yarn 100 more stable during the sizing process and reducing vibration or other unstable factors caused by unilateral pressure.

[0046] Symmetrical pressure distribution helps to better control the amount of size, reduce the accumulation of excess size on the roller, thereby reducing the formation of size skin or size residue, and further reducing the possibility of size residue falling onto the yarn 100.

[0047] In addition, the symmetrical design is easier to adjust during debugging because only one set of parameters needs to be adjusted to achieve synchronous changes on both sides, reducing the workload and complexity of debugging.

[0048] Obviously, through this symmetrical design, the sizing device can improve the sizing quality and stability of the yarn 100 while maintaining efficient production, reduce the risk of yarn 100 breakage, and thus improve the working efficiency of the entire sizing machine and the quality of the final product.

[0049] As shown in FIG. 1 , in some embodiments, the size tank includes a first size tank 700 , and the size roller 400 , the first pre-pressing roller 300 , and the second pre-pressing roller 600 are partially immersed in the size liquid in the first size tank 700 .

[0050] In these embodiments, the lower parts of the sizing roller 400, the first pre-pressing roller 300 and the second pre-pressing roller 600 are all immersed in the slurry in the first slurry tank 700. The main purpose of this design is to better control the distribution of the slurry and ensure that the slurry can be evenly attached to the yarn 100.

[0051] By partially immersing the sizing roller 400, the first pre-pressing roller 300, and the second pre-pressing roller 600 in the same sizing tank, it is ensured that the three rollers are all loaded with an appropriate amount of sizing. In this way, when the yarn 100 passes through the three rollers in sequence, the sizing can be more evenly distributed on the yarn 100.

[0052] Furthermore, by partially immersing the sizing roller 400, the first pre-pressing roller 300 and the second pre-pressing roller 600 in the same first sizing tank 700, that is, sharing the sizing liquid in the first sizing tank 700, unnecessary sizing liquid waste can be reduced, thereby lowering production costs.

[0053] In some embodiments, the size tank further includes a second size tank, and the high-pressure roller 500 is partially immersed in the second size tank.

[0054] In these embodiments, in order to further improve the sizing quality, a second slurry tank can be added, so that the high-pressure roller 500 and the second slurry tank are matched to ensure that the high-pressure roller 500 can also be partially immersed in the slurry in the second slurry tank to add a fourth sizing.

[0055] Illustratively, the second slurry tank is located below the high-pressure roller 500 , and the lower portion of the high-pressure roller 500 is immersed in the second slurry tank.

[0056] In some embodiments, the slot opening of the first slurry tank 700 and / or the slot opening of the second slurry tank are flared.

[0057] In these embodiments, the following conditions exist:

[0058] 1) The notch of the first slurry tank 700 is configured to be flared;

[0059] 2) The notch of the second slurry tank is set to be flared;

[0060] 3) The slots of the first slurry tank 700 and the second slurry tank are both configured to be flared.

[0061] Obviously, through the above arrangement, the volume of the first slurry tank 700 or the second slurry tank can be reduced, the demand for slurry can be reduced, and the purpose of saving slurry can be achieved.

[0062] As shown in FIG. 1 , in some embodiments, at least one of the sizing roller 400 , the first pre-pressing roller 300 , and the second pre-pressing roller 600 is close to the bottom of the first sizing tank 700 .

[0063] In these embodiments, first, the rollers close to the bottom of the groove can ensure that their surfaces are always in contact with fresh slurry, which helps to maintain a uniform distribution of slurry on the yarn 100 because the slurry can be directly brought up from the bottom of the groove and evenly applied to the yarn 100.

[0064] Secondly, the rollers close to the bottom of the tank can reduce the chance of the slurry staying in the tank for a long time, thereby reducing the formation of pulp skin or pulp residue. This is because the slurry is usually in a flowing state at the bottom of the tank and is not easy to form solidified pulp skin.

[0065] Furthermore, the design close to the bottom of the tank can ensure that the slurry is used more effectively, reducing the waste of slurry in the tank. This can improve the efficiency of slurry use and reduce production costs.

[0066] It should be noted that the design close to the bottom of the tank can reduce the chance of air entering the slurry and mixing with it, because the slurry near the bottom is usually in a relatively static state and is less likely to introduce bubbles. This helps maintain the stability of the slurry and reduces the impact of bubbles on the sizing effect.

[0067] For example, in this embodiment, the sizing roller 400 is located near the bottom of the first size tank 700. Of course, in other embodiments, the first pre-pressing roller 300 is located near the bottom of the first size tank 700. Alternatively, the second pre-pressing roller 600 is located near the bottom of the first size tank 700, and so on, which are not specifically limited here.

[0068] As shown in Figure 1, in some embodiments, the sizing device further includes a guide roller 200. In the moving direction of the yarn 100, the guide roller 200 is located upstream of the first pre-pressing roller 300, and the first pre-pressing roller 300 is located between the guide roller 200 and the sizing roller 400.

[0069] In these embodiments, the yarn 100 enters the sizing roller 400 after passing through the yarn guide roller 200. It can be seen that by setting the yarn guide roller 200 at a lower position, the operating space for maintaining the sizing roller 400 and the first pre-pressing roller 300 is increased.

[0070] As shown in FIG. 1 , in some embodiments, the diameters of the first pre-pressing roller 300 , the second pre-pressing roller 600 , and the high-pressure roller 500 are all smaller than the diameter of the sizing roller 400 .

[0071] In these embodiments, the diameters of the first pre-pressing roller 300, the second pre-pressing roller 600, and the high-pressure roller 500 are all smaller than the diameter of the sizing roller 400. This design has the following advantages:

[0072] Smaller diameter pre-pressing rollers and high-pressure rollers 500 can provide finer control, making the size adhere more evenly to the yarn 100. Smaller diameters mean a smaller area in contact with the yarn 100, making it easier to adjust the pressure, thereby reducing the situation where the size is too thick or too thin in some areas.

[0073] The small diameter pre-pressing roller and high-pressure roller 500 have a faster surface renewal rate when rotating, which can reduce the residence time of the slurry on the roller surface, thereby reducing the formation of pulp skin or pulp residue. This ensures that the slurry is fresher and has fewer impurities.

[0074] A smaller diameter means the roller has less rotational inertia, making it easier to adjust the speed, which improves sizing efficiency. Smaller rollers also mean less slurry is carried out with each rotation, allowing for more precise control of sizing amount.

[0075] Smaller pre-pressing rollers and high-pressure rollers 500 can reduce the pressure on the yarn 100 and avoid damage to the yarn 100 caused by excessive squeezing. This is especially important for fine yarns 100 or sensitive materials.

[0076] In some embodiments, the present application also provides a sizing machine, which includes a sizing device as described in any one of the above embodiments.

[0077] Since the above-mentioned sizing device has the above-mentioned technical effects, the sizing machine including the sizing device should have the same technical effects, which will not be described in detail here.

[0078] In all examples shown and described herein, any specific values ​​should be interpreted as merely exemplary and not limiting, and thus other examples of the exemplary embodiments may have different values.

[0079] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0080] The above-described embodiments merely represent several implementation methods of the present application. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present application. It should be noted that a person skilled in the art may make various modifications and improvements without departing from the scope of the present application, and such modifications and improvements are all within the scope of protection of the present application.

Claims

1. A sizing device, characterized in that: The sizing device includes a sizing roller, a first pre-pressing roller, a second pre-pressing roller, a high-pressure roller and a sizing tank. The sizing roller, the first pre-pressing roller, the second pre-pressing roller and the high-pressure roller are arranged in parallel. The first pre-pressing roller, the second pre-pressing roller and the high-pressure roller are arranged at intervals along the circumference of the sizing roller, and the first pre-pressing roller, the second pre-pressing roller and the high-pressure roller respectively form an extrusion area between the sizing roller; wherein, at least three of the sizing roller, the first pre-pressing roller, the second pre-pressing roller and the high-pressure roller are immersed in the slurry in the sizing tank.

2. The sizing device according to claim 1, characterized in that The first pre-pressing roller and the second pre-pressing roller are respectively located on both sides of a vertical plane where the axis of the sizing roller is located.

3. The sizing device according to claim 2, characterized in that The first pre-pressing roller and the second pre-pressing roller are symmetrically arranged with respect to a vertical plane where the axis of the sizing roller is located.

4. The sizing device according to claim 3, characterized in that The size tank includes a first size tank, and the size roller, the first pre-pressing roller and the second pre-pressing roller are partially immersed in the size liquid in the first size tank.

5. The sizing device according to claim 4, characterized in that The size tank further includes a second size tank, and the high-pressure roller is partially immersed in the second size tank.

6. The sizing device according to claim 5, characterized in that The notch opening of the first slurry trough and / or the notch opening of the second slurry trough is in a flared shape.

7. The sizing device according to claim 4, characterized in that At least one of the sizing roller, the first pre-pressing roller and the second pre-pressing roller is close to the bottom of the first sizing tank.

8. The sizing device according to claim 1, characterized in that The sizing device further comprises a yarn guide roller, which is located upstream of the first pre-pressing roller in the moving direction of the yarn, and the first pre-pressing roller is located between the yarn guide roller and the sizing roller.

9. The sizing device according to claim 1, characterized in that: The diameter of the first pre-pressing roller, the diameter of the second pre-pressing roller and the diameter of the high-pressure roller are all smaller than the diameter of the sizing roller.

10. A sizing machine, characterized in that: The sizing machine includes the sizing device according to any one of claims 1 to 9.