A pre-dispersing device for thermoplastic prepreg processing

Abstract

The utility model discloses a pre-dispersion device for thermoplastic prepreg processing, belonging to the technical field of thermoplastic prepreg processing. A pre-dispersion device for thermoplastic prepreg processing, including a creel and a frame, characterized by an ejection module; also including a vibration dispersion roller, one end of which is provided with a high-frequency vibrator, the creel and the frame are connected through a positioning plate, one side of the creel is provided with a first motor, one end of the first motor is provided with a transmission belt, one end of the transmission belt is provided with a first traction roller, and a comb frame is provided below the first motor. In order to solve the problem that the uneven dispersion of the tow fibers is easy to occur, which indirectly leads to the occurrence of yarn hair and breakage, the tow fibers are first dispersed in equal proportions by comb teeth, the vibration dispersion roller stretches and shakes out the tow fibers, and finally the ejection module and the fixed roller cooperate to roll and flatten the shaken tow fibers, thereby achieving the purpose of pre-dispersion.

Description

Technical Field

[0001] The utility model relates to the technical field of prepreg processing, in particular to a pre-dispersing device for thermoplastic prepreg processing. Background Art

[0002] At present, the reinforcing fibers used in advanced composite materials (including thermoplastic prepregs) are mainly carbon fibers. In order to achieve low prices, the number of carbon fiber bundles (large tow fibers) is increased, but large tow carbon fibers have the phenomenon of fiber bending and kinking as the number of fiber bundles increases, and the resin matrix is ​​not easy to infiltrate the inside of the large tow fiber bundles, and pores are easily generated between the single fibers, which easily causes defects such as enrichment and separation of the fiber phase and the resin phase, thereby affecting the strength and stiffness of the composite material. Therefore, it is necessary to pre-disperse the carbon fibers.

[0003] Chinese patent publication number CN217418915U discloses a yarn spreading device, which adjusts the amplitude of the reciprocating motion of the yarn spreading roller by adjusting the relative position of the movable part and the fixed part, so that the yarn spreading device is suitable for spreading fiber bundles of different specifications.

[0004] In the above patent, there is a problem that the fiber bundles are easily unevenly dispersed, which indirectly leads to problems such as yarn fuzz and breakage; therefore, it does not meet the existing needs, and a pre-dispersing device for thermoplastic prepreg processing is proposed. Utility Model Content

[0005] The utility model aims to provide a pre-dispersing device for thermoplastic prepreg processing, wherein a comb frame is first arranged in the moving direction of the tow fibers, the tow fibers pass through the comb frame, and the comb teeth inside the comb frame pre-disperse the tow fibers, and the tow fibers then pass through a traction roller, and the traction roller heats the tow fibers to remove the slurry on the surface thereof, and then the tow fibers continue to move through a vibrating dispersion roller, and the tow fibers will be stretched and shaken apart by the roller body, and finally the ejection module and the fixed roller cooperate to roll and flatten the shaken tow fibers, thereby achieving the purpose of pre-dispersion, and can solve the problems in the prior art.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pre-dispersion device for thermoplastic prepreg processing, comprising a creel and a frame, characterized by an ejection module; further comprising a vibration dispersion roller, the vibration dispersion roller being mounted on the surface of the frame, a high-frequency vibrator being arranged at one end of the vibration dispersion roller, tow fibers being arranged inside the creel, the creel and the frame being connected via a positioning plate, a first motor being arranged at one side of the creel, a transmission belt being arranged at one end of the first motor, a first traction roller being arranged at one end of the transmission belt, a comb frame being arranged below the first motor, a plurality of comb teeth being arranged inside the comb frame, first fixed rollers being arranged at both sides of the comb frame, and second fixed rollers being arranged at both sides of the ejection module.

[0007] Preferably, one end of the tow fiber is located inside the creel, and the other end is provided with a winding drum, and the winding drum drives the tow fiber to move.

[0008] Preferably, a second traction roller is arranged below the first traction roller, the surfaces of the first traction roller and the second traction roller are made of rubber material, and water circulation heaters are arranged inside the first traction roller and the second traction roller.

[0009] Preferably, the intervals between the comb teeth are the same, and the comb teeth are slender ellipsoid structures with smooth surfaces.

[0010] Preferably, the high-frequency vibrator controls the vibration dispersion roller to vibrate up and down.

[0011] Preferably, the first fixed roller and the second fixed roller are both stainless steel cylindrical structures with smooth surfaces.

[0012] Preferably, the ejection module includes a lifting roller, a connecting piece, a ejector rod, a second motor, a first fixed plate, a slider and a second fixed plate, the slider is installed on the side of the connecting piece, the second motor is installed on the side of the second fixed plate, the first fixed plate is welded to the frame, and the second fixed plate is welded to the frame.

[0013] Preferably, a track is provided inside the first fixing plate, and the slider moves in the track.

[0014] Preferably, the lifting roller is installed at one end of the connecting member, the connecting member is connected to the second motor through a push rod, and the second motor indirectly controls the movement of the lifting roller.

[0015] Compared with the prior art, the beneficial effects of the utility model are:

[0016] 1. The utility model arranges a water circulation heater inside the traction roller so that the surface of the traction roller always maintains a stable temperature, indirectly heats the passing tow fibers, removes the coating on the surface of the tow fibers, and makes the tow fibers better dispersed later; at the same time, because the surface of the traction roller needs to contact with the tow fibers, the higher the contact surface temperature, the lower the friction, which can reduce the situation that the tow fibers are pulled apart and the yarn hair appears.

[0017] 2. The utility model controls the vibration dispersion roller to vibrate up and down through a high-frequency vibrator. The roller body stretches and shakes out the tow fibers. The shaken-out tow fibers continue to move through the ejection module and the fixed roller. The ejection module changes the distance between the lifting roller and the fixed roller, thereby changing the tension and wrap angle of the tow fibers, and can stably disperse the tow fibers. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the overall front view of the utility model;

[0019] Figure 2 It is a schematic diagram of the movement of the tow fibers of the utility model;

[0020] Figure 3 This is a schematic diagram of the transmission belt structure of the utility model;

[0021] Figure 4 It is a schematic diagram of the structure of the ejection module of the utility model.

[0022] In the figure: 1, yarn frame; 101, positioning plate; 2, first motor; 201, transmission belt; 202, first traction roller; 2021, second traction roller; 3, comb frame; 301, comb teeth; 4, ejection module; 401, lifting roller; 402, connecting piece; 403, ejector rod; 404, second motor; 405, first fixed plate; 406, slider; 407, second fixed plate; 5, vibration dispersion roller; 501, high-frequency vibrator; 6, frame; 7, first fixed roller; 8, second fixed roller; 9, tow fiber. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] In order to solve the problem of uneven dispersion of tow fibers, which indirectly leads to yarn fuzz and breakage, please refer to Figure 1-4The utility model provides an embodiment: a pre-dispersion device for thermoplastic prepreg processing, comprising a creel 1 and a frame 6, characterized by an ejection module 4; further comprising a vibration dispersion roller 5, the vibration dispersion roller 5 is mounted on the surface of the frame 6, one end of the vibration dispersion roller 5 is provided with a high-frequency vibrator 501, the interior of the creel 1 is provided with a tow fiber 9, one end of the tow fiber 9 is located inside the creel 1, and the other end of the tow fiber 9 is provided with a winding drum, the winding drum drives the tow fiber 9 to move, the creel 1 is connected to the frame 6 through a positioning plate 101, and one side of the creel 1 is provided with a first A motor 2 is provided, a transmission belt 201 is provided at one end of the first motor 2, a first traction roller 202 is provided at one end of the transmission belt 201, a comb frame 3 is provided below the first motor 2, a plurality of comb teeth 301 are provided inside the comb frame 3, the intervals between the comb teeth 301 are the same, the comb teeth 301 are slender elliptical structures with smooth surfaces, first fixed rollers 7 are provided on both sides of the comb frame 3, second fixed rollers 8 are provided on both sides of the ejection module 4, the comb teeth 301 first separate the tow fibers 9 in equal proportions, and further reduce the possibility of crossing when the tow fibers 9 are subsequently dispersed and unfolded.

[0025] A second traction roller 2021 is arranged below the first traction roller 202. The surfaces of the first traction roller 202 and the second traction roller 2021 are made of rubber. The first traction roller 202 and the second traction roller 2021 are both provided with water circulation heaters. The water circulation heaters continuously pass hot water of set temperature through the interior of the roller body, thereby ensuring that the surface temperature of the roller body is always within the required range. When the tow fibers 9 pass between the first traction roller 202 and the second traction roller 2021, the tow fibers 9 are indirectly heated, which can remove the coating on the surface of the tow fibers 9, thereby further making the tow fibers 9 better dispersed later. At the same time, since the surface of the traction roller needs to contact with the tow fibers 9, the higher the contact surface temperature, the lower the friction, which can further reduce the situation where the tow fibers 9 are pulled apart and the yarn hairs appear.

[0026] The ejection module 4 includes a lifting roller 401, a connecting member 402, a push rod 403, a second motor 404, a first fixed plate 405, a slider 406 and a second fixed plate 407. The slider 406 is installed on the side of the connecting member 402, the second motor 404 is installed on the side of the second fixed plate 407, the first fixed plate 405 is welded to the frame 6, the second fixed plate 407 is welded to the frame 6, a track is provided inside the first fixed plate 405, and the slider 406 moves in the track. The lifting roller 401 is installed at one end of the connecting member 402, the connecting member 402 and the second motor 404 are connected through the push rod 403, and the second motor 404 indirectly controls the movement of the lifting roller 401.

[0027] The high-frequency vibrator 501 controls the vibration dispersion roller 5 to vibrate up and down, and the roller body can stretch and shake out the tow fibers 9. The shaken-out tow fibers 9 continue to move. When passing through the ejection module 4 and the second fixed roller 8, the ejection module 4 changes the distance between the lifting roller 401 and the second fixed roller 8, thereby changing the tension and wrap angle of the tow fibers 9, so that the shaken-out tow fibers 9 diffuse in the width direction, thereby achieving the purpose of pre-dispersion of the tow fibers 9 and further improving the stability of the dispersion of the tow fibers 9.

[0028] Working principle: a comb frame 3 is first set in the moving direction of the tow fibers 9, the tow fibers 9 pass through the comb frame 3, and the comb teeth 301 inside the comb frame 3 pre-disperse the tow fibers 9, and the tow fibers 9 then pass through the first traction roller 202 and the second traction roller 2021. After the first traction roller 202 and the second traction roller 2021 heat the tow fibers 9 to remove the slurry on the surface, the tow fibers 9 continue to move through the vibrating dispersion roller 5, and the high-frequency vibrator 501 controls the vibrating dispersion roller 5 to vibrate up and down, and the tow fibers 9 will be stretched and shaken apart by the vibrating dispersion roller 5, and finally the ejection module 4 and the second fixed roller 8 cooperate to roll and flatten the shaken tow fibers 9, thereby achieving the purpose of pre-dispersion.

[0029] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0030] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A pre-dispersing device for thermoplastic prepreg processing, comprising a creel (1) and a frame (6), characterized in that The ejection module (4) also includes a vibration dispersion roller (5), the vibration dispersion roller (5) is mounted on the surface of the frame (6), a high-frequency vibrator (501) is arranged at one end of the vibration dispersion roller (5), a tow fiber (9) is arranged inside the yarn frame (1), the yarn frame (1) is connected to the frame (6) through a positioning plate (101), a first motor (2) is arranged on one side of the yarn frame (1), a transmission belt (201) is arranged at one end of the first motor (2), a first traction roller (202) is arranged at one end of the transmission belt (201), a comb frame (3) is arranged below the first motor (2), a plurality of comb teeth (301) are arranged inside the comb frame (3), first fixed rollers (7) are arranged on both sides of the comb frame (3), and second fixed rollers (8) are arranged on both sides of the ejection module (4).

2. A pre-dispersing device for thermoplastic prepreg processing according to claim 1, characterized in that: One end of the tow fiber (9) is located inside the yarn frame (1), and the other end is provided with a winding drum, which drives the tow fiber (9) to move.

3. The pre-dispersing device for thermoplastic prepreg processing according to claim 1, characterized in that: A second traction roller (2021) is arranged below the first traction roller (202); the surfaces of the first traction roller (202) and the second traction roller (2021) are made of rubber material; and water circulation heaters are arranged inside the first traction roller (202) and the second traction roller (2021).

4. The pre-dispersing device for thermoplastic prepreg processing according to claim 1, characterized in that: The comb teeth (301) are spaced at the same distance from each other, and the comb teeth (301) are elongated ellipsoid structures with smooth surfaces.

5. The pre-dispersing device for thermoplastic prepreg processing according to claim 1, characterized in that: The high-frequency vibrator (501) controls the vibration dispersion roller (5) to vibrate up and down.

6. The pre-dispersing device for thermoplastic prepreg processing according to claim 1, characterized in that: The first fixed roller (7) and the second fixed roller (8) are both stainless steel cylindrical structures with smooth surfaces.

7. The pre-dispersing device for thermoplastic prepreg processing according to claim 1, characterized in that: The ejection module (4) comprises a lifting roller (401), a connecting member (402), a ejector rod (403), a second motor (404), a first fixed plate (405), a slider (406) and a second fixed plate (407), wherein the slider (406) is mounted on a side of the connecting member (402), the second motor (404) is mounted on a side of the second fixed plate (407), the first fixed plate (405) is welded to a frame (6), and the second fixed plate (407) is welded to the frame (6).

8. A pre-dispersing device for thermoplastic prepreg processing according to claim 7, characterized in that: A track is provided inside the first fixing plate (405), and the slider (406) moves inside the track.

9. A pre-dispersing device for thermoplastic prepreg processing according to claim 7, characterized in that: The lifting roller (401) is installed at one end of the connecting member (402), the connecting member (402) is connected to the second motor (404) via a push rod (403), and the second motor (404) indirectly controls the movement of the lifting roller (401).

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