A novel sizing groove for bundled short-cut carbon fibers

Abstract

This utility model discloses a novel sizing tank for bundled short-cut carbon fibers, comprising a sizing tank body, a sizing agent delivery pipe, and a filter screen. The sizing tank body is integrally composed of a sloping structure and an inverted quadrangular pyramid structure, with its inner wall coated with an anti-adhesion coating. The lowest point of the inverted quadrangular pyramid structure has a discharge port, which is connected to a sizing agent discharge port and a cleaning liquid discharge port, both equipped with independent ball valves, via a three-way connector. The filter screen is detachably placed on top of the inverted quadrangular pyramid structure via a handle. This utility model, through its unique tank structure design, anti-adhesion coating, and multi-channel discharge, solves the problems of incomplete discharge, frequent material changes, and difficult cleaning associated with traditional sizing tanks, significantly improving production flexibility and product quality stability.

Description

Technical Field

[0001] This utility model relates to the technical field of equipment for producing bundled carbon fiber, and in particular to a novel sizing tank for bundled short-cut carbon fiber. Background Technology

[0002] During carbon fiber production, a certain amount of low-grade or small-roll products are generated. To make full use of resources and improve economic efficiency, these small carbon fiber rolls are often sized and then chopped and bundled for use in non-load-bearing or secondary load-bearing composite material components (such as molding compounds). The sizing process is crucial to the bundle properties, dispersion, and bonding strength of the chopped fibers with the matrix.

[0003] Currently, traditional sizing tanks are mostly flat-bottomed, which has the following drawbacks: (1) Incomplete discharge of sizing agent: Flat-bottomed tanks are prone to forming dead corners of liquid accumulation, making it difficult to drain completely. For production lines that need to frequently change the type of sizing agent to adapt to different product requirements, this will cause cross-contamination between batches, seriously affecting the stability of product quality, and also causing waste of sizing agent. (2) Low efficiency in changing sizing agent: Incomplete discharge means that a lot of manual cleaning must be carried out before changing the sizing agent, which is time-consuming and labor-intensive, making it impossible to achieve flexible production of small batches and multiple varieties, and limiting the high added value conversion of small roll carbon fiber. (3) Difficult to clean and maintain: It is inconvenient to clean the inside of the tank. After long-term operation, the tank walls and bottom are prone to accumulate solidified slurry and fiber debris, which is extremely difficult and time-consuming to clean.

[0004] Therefore, it is of great significance to study a novel sizing groove for bundled short-cut carbon fibers to solve the above problems. Utility Model Content

[0005] The purpose of this invention is to provide a novel sizing groove for bundled short-cut carbon fibers, which solves one or more of the problems mentioned above in the prior art.

[0006] This utility model provides a novel sizing groove for bundled short-cut carbon fibers, comprising:

[0007] The sizing tank body includes a sloping structure and an inverted quadrangular pyramid structure, and the sloping structure and the inverted quadrangular pyramid structure are integrally connected; the inner wall of the sizing tank body is coated with an anti-adhesion coating.

[0008] A sizing agent delivery pipe is located on the upper right side of the sizing tank body, and a ball valve A is provided on the pipe.

[0009] The filter screen is a single-layer structure with handles on both sides and can be detachably placed at the top opening of the inverted square pyramid structure.

[0010] In some embodiments, the inclination angle of the ramp structure is 10° to 40°.

[0011] In some embodiments, the inclination angle of the ramp structure is 15° to 30°.

[0012] Specifically, by setting the above-mentioned tilt angle, it can be ensured that the sizing agent can be quickly collected and discharged.

[0013] In some embodiments, the lowest point of the inverted square pyramid structure is provided with a discharge port, which is connected to a vertical cleaning fluid discharge port and a horizontal sizing agent discharge port respectively via a tee connector.

[0014] In some embodiments, a ball valve B is provided at the cleaning fluid outlet, and a ball valve C is provided at the sizing agent outlet.

[0015] In some embodiments, the angles between the four inclined planes of the inverted quadrangular pyramid structure and the horizontal plane are all between 40° and 60°.

[0016] The aforementioned tilt angle ensures that the sizing agent is completely discharged during the discharge process.

[0017] In some embodiments, a fixed guide roller A, a fixed guide roller B, and a movable guide roller for guiding carbon fibers are also included; the movable guide roller is detachably fixed to the sizing tank body by bolts and is located directly above the inverted quadrangular pyramid structure.

[0018] In some implementations, the cleaning fluid discharge port is connected to a waste liquid collection tank, and the sizing agent discharge port is connected to a sizing agent storage tank, so as to achieve separate discharge of sizing agent and cleaning fluid, avoid cross-contamination, and eliminate the need for pipeline switching operations;

[0019] In some embodiments, the sizing agent delivery pipe is connected to the sizing agent storage tank and the sizing supply is controlled by a ball valve.

[0020] In some embodiments, the filter screen is a single-layer filter screen used to filter carbon fiber lint and other impurities, and has handles on both sides for easy removal and cleaning.

[0021] In some implementations, the movable guide roller is fixed to the sizing tank body by bolts, and its position can be adjusted according to process requirements;

[0022] In some embodiments, the sizing tank body is made of stainless steel, and the anti-adhesion coating is a Teflon coating or a ceramic coating. This effectively prevents sizing and lint adhesion, facilitating cleaning.

[0023] Beneficial effects:

[0024] (1) Thorough and residue-free discharge of sizing agent: By optimizing the tank structure into a combination of slope and inverted quadrangular pyramid, the inner wall is coated with an anti-stick coating, and a discharge port is set at the lowest point. The sizing agent is completely discharged by gravity, eliminating dead corners of liquid accumulation and avoiding batch-to-batch contamination.

[0025] (2) High efficiency in material replacement and cleaning: The tank can be emptied and cleaned quickly, significantly reducing material replacement time and supporting flexible production of multiple varieties; the detachable filter screen design greatly reduces the difficulty of cleaning and the intensity of work, improving the efficiency and lifespan of the equipment. Attached Figure Description

[0026] Figure 1 This is a schematic diagram of a novel sizing groove for bundled short-cut carbon fibers according to this utility model;

[0027] Figure 2 This is a schematic diagram of a filter screen;

[0028] Among them, 1-the main body of the sizing tank, 2-the inclined structure, 3-the inverted quadrangular pyramid structure, 4-the filter screen, 5-the sizing agent conveying pipe, 6-ball valve A, 7-the cleaning liquid discharge port, 8-ball valve B, 9-the sizing agent discharge port, 10-ball valve C, 11-the fixed guide roller A, 12-the movable guide roller, 13-the fixed guide roller B. Detailed Implementation

[0029] To make the above-mentioned objectives, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model are described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0030] It should be noted that when an element is referred to as being "fixed to" another element, it can be directly attached to the other element or there may be an intervening element. When an element is referred to as being "connected to" another element, it can be directly connected to the other element or there may be an intervening element. The terms "vertical," "horizontal," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only possible implementation.

[0031] like Figure 1 The image shows a novel sizing groove for bundled short-cut carbon fibers, comprising:

[0032] The system includes a sizing tank body 1, a sizing agent delivery pipe 5, and a filter screen 4. The sizing tank body 1 is composed of an inclined structure 2 and an inverted square pyramid structure 3 connected together, and its inner wall is coated with an anti-adhesion coating. The lowest point of the inverted square pyramid structure 3 is provided with a discharge port, which is connected to a vertical cleaning liquid discharge port 7 and a horizontal sizing agent discharge port 9 through a three-way connector. A ball valve B8 is provided on the cleaning liquid discharge port 7, and a ball valve C10 is provided on the sizing agent discharge port 9. The filter screen 4 is a single-layer structure with handles on both sides and can be detachably placed at the top opening of the inverted square pyramid structure 3.

[0033] The sizing agent delivery pipe 5 is located on the upper right side of the sizing tank body 1, and a ball valve A6 is provided on the pipe;

[0034] Fixed guide roller A11, fixed guide roller B13 and a movable guide roller 12 are used to guide carbon fibers; the movable guide roller 12 is detachably fixed to the sizing tank body 1 by bolts and is located directly above the inverted square pyramid structure 3.

[0035] The main body of the sizing tank 1 is made of stainless steel, and the anti-adhesion coating is a Teflon coating or a ceramic coating.

[0036] Specifically, the inclination angle of the ramp structure 2 is 10° to 40°; preferably, the inclination angle of the ramp structure 2 is 15° to 30°.

[0037] The angles between the four inclined planes of the inverted quadrangular pyramid structure 3 and the horizontal plane are all between 40° and 60°.

[0038] like Figure 2 The image shows a filter screen.

[0039] Working principle:

[0040] In use, carbon fiber bundles enter the tank via the fixed guide roller A11, are immersed and sized by the movable guide roller 12, and are then led out by the fixed guide roller B13. When the sizing agent needs to be replaced, first open the ball valve C10 to drain the remaining sizing agent, and then close the ball valve C10 after emptying. Remove the movable guide roller 12 and filter screen 4 for cleaning, and simultaneously pour clean water into the sizing tank for cleaning. After cleaning, open the ball valve B8 to drain the cleaning solution, and then close the ball valve B8 after emptying. Reinstall the filter screen 4 and movable guide roller 12, open the ball valve A6 to inject new sizing agent, and close the ball valve A6 after the working liquid level has been reached to resume production.

[0041] In summary, the present invention provides a novel sizing groove for bundled short-cut carbon fibers, which has the following advantages:

[0042] (1) Thorough and residue-free discharge of sizing agent: By optimizing the tank structure into a combination of slope and inverted quadrangular pyramid, the inner wall is coated with an anti-stick coating, and a discharge port is set at the lowest point. The sizing agent is completely discharged by gravity, eliminating dead corners of liquid accumulation and avoiding batch-to-batch contamination.

[0043] (2) High efficiency in material replacement and cleaning: The tank can be emptied and cleaned quickly, significantly reducing material replacement time and supporting flexible production of multiple varieties; the detachable filter screen design greatly reduces the difficulty of cleaning and the intensity of work, improving the efficiency and lifespan of the equipment.

[0044] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the inventive concept of the present utility model, and these should also be considered within the protection scope of the present utility model.

Claims

1. A novel sizing groove for bundled short-cut carbon fibers, characterized in that, include: The sizing tank body (1) includes a ramp structure (2) and an inverted quadrangular pyramid structure (3), and the ramp structure (2) and the inverted quadrangular pyramid structure (3) are integrally connected; the inner wall of the sizing tank body is coated with an anti-adhesion coating. The sizing agent delivery pipe (5) is located on the upper right side of the sizing tank body (1), and a ball valve A (6) is provided on the pipe. The filter screen (4) is a single-layer structure with handles on both sides and is detachably placed at the top opening of the inverted quadrangular pyramid structure (3).

2. The novel sizing groove for bundled short-cut carbon fibers according to claim 1, characterized in that, The inclination angle of the ramp structure (2) is 10° to 40°.

3. The novel sizing groove for bundled short-cut carbon fibers according to claim 2, characterized in that, The inclination angle of the slope structure (2) is 15° to 30°.

4. The novel sizing groove for bundled short-cut carbon fibers according to claim 1, characterized in that, The lowest point of the inverted quadrangular pyramid structure (3) is provided with a discharge port, which is connected to the vertical cleaning liquid discharge port (7) and the horizontal sizing agent discharge port (9) respectively through a tee connector.

5. A novel sizing groove for bundled short-cut carbon fibers according to claim 4, characterized in that, The cleaning fluid outlet (7) is equipped with a ball valve B (8), and the sizing agent outlet (9) is equipped with a ball valve C (10).

6. The novel sizing groove for bundled short-cut carbon fibers according to claim 1, characterized in that, The angles between the four inclined planes of the inverted quadrangular pyramid structure (3) and the horizontal plane are all between 40° and 60°.

7. The novel sizing groove for bundled short-cut carbon fibers according to claim 1, characterized in that, It also includes a fixed guide roller A (11), a fixed guide roller B (13) for guiding carbon fibers, and a movable guide roller (12); the movable guide roller (12) is detachably fixed to the sizing tank body (1) by bolts and is located directly above the inverted quadrangular pyramid structure (3).

8. The novel sizing groove for bundled short-cut carbon fibers according to claim 1, characterized in that, The main body (1) of the slurry tank is made of stainless steel, and the anti-adhesion coating is a Teflon coating or a ceramic coating.

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