Carbon fiber yarn spreading auxiliary device

Abstract

The utility model relates to the technical field of prepreg processing, in particular to a carbon fiber yarn spreading auxiliary device which comprises a vibration damping mechanism and a broken yarn collecting mechanism which are arranged side by side along a carbon fiber yarn scattering path, and the vibration damping mechanism comprises a machine frame and a plurality of adjusting rollers horizontally arranged on the machine frame. The adjusting rollers are arranged in a staggered mode in the vertical direction, the two ends of each adjusting roller are movably connected with the machine frame through buffering assemblies, the broken yarn collecting mechanism comprises an air blowing groove located above a carbon fiber loose yarn path and a collecting groove located below the carbon fiber loose yarn path, and a groove opening of the air blowing groove is opposite to a groove opening of the collecting groove. An air feeder connected with the interior of the air blowing groove is arranged on the outer side of the air blowing groove, and an exhaust fan connected with the interior of the collecting groove is arranged on the outer side of the collecting groove. According to the utility model, the carbon fiber loose yarns entering the composite roller group are subjected to shock absorption, and the residual broken fiber yarns on the carbon fiber loose yarns are collected, so that the quality of the finally synthesized carbon fiber prepreg cloth is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of prepreg processing, in particular to a carbon fiber yarn spreading auxiliary device. Background Art

[0002] Carbon fiber prepreg is a composite material made of carbon fiber yarn, epoxy resin, release paper and other materials through processes such as coating, hot pressing and laminating. In the entire process, the uniformity of the carbon fiber yarn is an important factor affecting the quality of the carbon fiber prepreg. The carbon fiber yarn is formed by expanding and dispersing the carbon fiber bundles through the yarn spreading equipment. The existing yarn spreading equipment includes a yarn spreading roller group and a composite roller group arranged side by side along the forward direction of the carbon fiber bundle. The yarn spreading roller group consists of a horizontal vibrating roller that vibrates in the horizontal direction and a vertical vibrating roller that vibrates in the vertical direction. The carbon fiber bundle is widened and thinned under the combined action of the horizontal tension applied by the horizontal vibrating roller and the vertical force applied by the vertical vibrating roller. The thinned carbon fiber loose yarn enters the composite roller group for heating and compounding to form the required carbon fiber yarn.

[0003] However, it was found in actual production that with the continuous vibration of the spreading roller group in the up, down, left and right directions, the same vibration effect was also produced on the carbon fiber loose yarn entering the composite roller group, causing the composite roller group to shake during rotation, thereby affecting the composite effect of the carbon fiber yarn; at the same time, during the spreading process, there are fiber yarn breaks due to vibration. Some of the fiber yarn breaks will fall off during the spreading process, and the other part of the fiber yarn breaks will enter the composite roller group together with the carbon fiber loose yarn for composite, and finally remain on the surface of the carbon fiber prepreg, affecting the quality of the carbon fiber prepreg. Utility Model Content

[0004] In order to solve the above-mentioned deficiencies of the prior art, the utility model provides a carbon fiber yarn spreading auxiliary device, which eliminates vibration of the carbon fiber loose yarn entering the composite roller group and collects the fiber broken yarns remaining on the carbon fiber loose yarn.

[0005] The technical solution of the utility model is: a carbon fiber yarn spreading auxiliary device, located between the yarn spreading roller group and the composite roller group, including a vibration elimination mechanism and a broken yarn collection mechanism arranged side by side along the carbon fiber loose yarn path, the vibration elimination mechanism includes a frame and a plurality of adjusting rollers on the horizontally arranged frame, each adjusting roller is arranged vertically staggered and the two ends of the adjusting roller are movably connected to the frame through a buffer assembly, the broken yarn collection mechanism includes a blowing trough located above the carbon fiber loose yarn path and a collecting trough located below the carbon fiber loose yarn path, the blowing trough and the collecting trough have notches arranged opposite to each other, a blower connected to the blowing trough is provided on the outside of the blowing trough, and an exhaust fan connected to the collecting trough is provided on the outside of the collecting trough. A vibration elimination mechanism and a broken yarn collection mechanism are arranged between the spreading roller group and the composite roller group. The carbon fiber loose yarns from the spreading roller group pass around the outside of each adjusting roller in turn and then enter the composite roller group. The carbon fiber loose yarns wrapped around the outside of the adjusting rollers offset the vibration effect of the spreading assembly on the carbon fiber loose yarns under the action of the buffer assembly, effectively avoiding the subsequent shaking of the composite roller group; the broken yarn collection device cleans and collects the broken yarns in the carbon fiber loose yarns by combining blowing and suction, thereby ensuring the quality of the carbon fiber loose yarns entering the composite roller group.

[0006] The broken yarn collecting mechanism is located on the side of the feed port of the composite roller group, the vibration elimination mechanism is located on the side of the discharge port of the yarn spreading roller group, and a guide roller is provided at a position of the frame away from the yarn spreading roller group. Both ends of the guide roller are rotatably connected to the frame via a bearing seat.

[0007] There are at least three adjusting rollers, which are divided into a first adjusting roller, a second adjusting roller and a third adjusting roller in sequence along the direction close to the yarn spreading roller group. The second adjusting roller is located above the first adjusting roller and the second adjusting roller.

[0008] The buffer assembly includes a vertical guide rail, a slider, a baffle and a spring. The vertical guide rail in the buffer assembly at the same end of each adjusting roller is fixed to the inner side of the frame via a pressure seat. The sliders in the buffer assembly at both ends of the same adjusting roller are rotatably connected to the adjusting roller via bearing seats. The slider is slidably connected to the vertical guide rail. The baffle is relatively fixed to the end of the vertical guide rail away from the pressure seat. The spring is sleeved on the vertical guide rail. One end of the spring is against the slider, and the other end of the spring is against the baffle / pressure seat.

[0009] The surface height of the guide roller is consistent with the height of the inlet of the composite roller group. The guide roller provides guidance for the carbon fiber loose yarn after vibration elimination by the vibration elimination mechanism, thereby improving its stability when entering the composite roller group.

[0010] A pressure equalizing plate is fixed at the notch of the blowing slot, and a plurality of air guide holes are opened on the pressure equalizing plate.

[0011] A collecting plate is fixed at the notch of the collecting tank, and a plurality of strip-shaped holes are opened on the collecting plate.

[0012] An annular baffle is formed on the top of the collecting trough and is arranged around the outside of the collecting plate. The end surface height of the annular baffle is smaller than the surface height of the guide roller.

[0013] The air inlet of the exhaust fan is connected to the collecting tank through the return air pipe, and the air outlet of the exhaust fan is sleeved with a filter bag.

[0014] The vertical guide rail has a threaded portion formed on one end away from the pressure seat. The baffle is mounted on the outside of the threaded portion through a through-hole. An adjustment nut is mounted on the baffle, which engages with the threaded portion. The adjustment nut engages with the threaded portion at the end of the vertical guide rail to adjust the position of the baffle on the vertical guide rail, thereby adjusting the compression of the spring to adapt to the vibration force generated by different types of carbon fiber bundles under the action of the yarn unrolling roller assembly.

[0015] The beneficial effects of the utility model are as follows: by arranging a vibration elimination mechanism and a broken yarn collecting mechanism between the yarn spreading roller group and the composite roller group, the carbon fiber loose yarns from the yarn spreading roller group successively bypass the outer sides of each adjusting roller and then enter the composite roller group; the carbon fiber loose yarns wound around the outside of the adjusting rollers are offset by the vibration effect of the yarn spreading assembly on the carbon fiber loose yarns under the action of the buffer assembly, thereby effectively avoiding the subsequent shaking of the composite roller group; the broken yarn collecting device cleans and collects the broken yarns in the carbon fiber loose yarns by combining blowing and suction, thereby ensuring the quality of the carbon fiber loose yarns entering the composite roller group. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model located between the yarn spreading roller group and the composite roller group bracket;

[0017] Figure 2 It is the main view of the utility model;

[0018] Figure 3 It is along Figure 2 Cross-sectional view in the AA direction;

[0019] Figure 4 It is a structural schematic diagram of the utility model from another angle;

[0020] Figure 5 yes Figure 4 A partial enlarged view of middle A.

[0021] Figure markings: 1. Frame; 2. Adjusting roller; 3. Buffer assembly; 301. Slider; 302. Spring; 303. Baffle; 304. Threaded portion; 305. Adjusting nut; 306. Fixing nut; 4. Collecting trough; 401. Return air duct; 402. Collecting plate; 403. Strip hole; 404. Annular baffle; 5. Blowing trough; 501. Pressure equalizing plate; 6. Exhaust fan; 601. Filter bag; 7. Air supply fan; 8. Guide roller; 9. Bearing seat; 10. Pressure seat; 11. Spreading roller group; 12. Composite roller group. DETAILED DESCRIPTION

[0022] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the technical solutions of the present invention are clearly and completely described below in conjunction with the accompanying drawings. Other embodiments obtained by those skilled in the art without making any creative work should fall within the scope of protection of the present invention.

[0023] like Figures 1-4 As shown, the utility model provides a carbon fiber yarn spreading auxiliary device, which is located between the yarn spreading roller group 11 and the composite roller group 12, and includes a vibration damping mechanism and a broken yarn collecting mechanism arranged side by side along the carbon fiber yarn spreading path. In this embodiment, in order to ensure the processing effect of broken yarns, the broken yarn collecting mechanism is located on the feed port side of the composite roller group 12, and the vibration damping mechanism is located on the discharge port side of the yarn spreading roller group 11.

[0024] The vibration elimination mechanism includes a frame 1 and a plurality of adjusting rollers 2 arranged horizontally on the frame 1. The adjusting rollers 2 are arranged vertically in an interlaced manner and the two ends of the adjusting rollers 2 are movably connected to the frame 1 through a buffer assembly 3. The carbon fiber loose yarns from the yarn spreading roller group 11 successively bypass the outside of each adjusting roller 2 and enter the composite roller group 12. The carbon fiber loose yarns wrapped around the outside of the adjusting roller 2 offset the vibration effect of the yarn spreading assembly on the carbon fiber loose yarns under the action of the buffer assembly 3, thereby effectively avoiding the subsequent composite roller group 12 from shaking; the broken yarn collection mechanism includes a blowing slot 5 located above the carbon fiber loose yarn path and a collecting slot 4 located below the carbon fiber loose yarn path. The notches of the blowing slot 5 and the collecting slot 4 are arranged opposite to each other. A blower 7 connected to the blowing slot 5 is provided on the outside of the blowing slot 5, and an exhaust fan 6 connected to the collecting slot 4 is provided on the outside of the collecting slot 4. By combining blowing and suction, the broken yarns in the carbon fiber loose yarns to be entered into the composite roller group 12 are cleaned and collected, thereby ensuring the quality of the carbon fiber loose yarns entering the composite roller group 12.

[0025] In this embodiment, there are at least three adjusting rollers 2, such as Figure 3As shown, the carbon fiber yarns are sequentially divided into a first adjusting roller, a second adjusting roller, and a third adjusting roller in the direction close to the yarn spreading roller assembly 11. The second adjusting roller is located above the first and second adjusting rollers. A guide roller 8 is provided on the frame 1 at a position away from the yarn spreading roller assembly 11. Both ends of the guide roller 8 are rotatably connected to the frame 1 via bearing seats 9. The carbon fiber yarns exiting the discharge port of the yarn spreading roller assembly 11 are sequentially passed under the first adjusting roller, over the second adjusting roller, and under the third adjusting roller. The first and third adjusting rollers exert a vertical downward buffering force on the passing carbon fiber yarns, while the second adjusting roller exerts a vertical upward buffering force on the passing carbon fiber yarns. The three groups of buffering effects synergistically offset the vibration effects generated by the yarn spreading assembly. The carbon fiber yarns are finally carried out from above the guide roller 8 and enter the inlet of the composite roller assembly 12. Further preferably, the surface height of the guide roller 8 is consistent with the height of the inlet of the composite roller assembly 12. The guiding effect of the guide roller 8 ensures that the vibration-damped carbon fiber yarns enter the composite roller assembly 12 more smoothly.

[0026] In this embodiment, Figure 5 As shown, the buffer assembly 3 includes a vertical guide rail, a slider 301, a baffle 303 and a spring 302. The vertical guide rail in the buffer assembly 3 at the same end of each adjusting roller 2 is fixed to the inner side of the frame 1 via the pressure seat 10. The sliders 301 in the buffer assembly 3 at both ends of the same adjusting roller 2 are rotatably connected to the adjusting roller 2 via the bearing seat 9. The slider 301 is slidably connected to the vertical guide rail. The baffle 303 is relatively fixed to the end of the vertical guide rail away from the pressure seat 10. The spring 302 is sleeved on the vertical guide rail. One end of the spring 302 is against the slider 301, and the other end of the spring 302 is against the baffle 303 / pressure seat 10. Specifically, as shown in FIG. Figure 3 As described, the lower surface of the slider 301 in the buffer assembly 3 at both ends of the first adjusting roller and the third adjusting roller is against the pressure seat 10, and the two ends of the spring 302 are respectively against the upper surface of the slider 301 and the baffle 303; the upper surface of the slider 301 in the buffer assembly 3 at both ends of the second adjusting roller is against the baffle 303, and the two ends of the spring 302 are respectively against the lower surface of the slider 301 and the pressure seat 10.

[0027] Further preferably, a threaded portion 304 is formed on one end of the vertical guide rail away from the pressure-bearing seat 10, and the baffle 303 is sleeved on the outside of the threaded portion 304 through a through-hole, and an adjusting nut 305 that cooperates with the threaded portion 304 is installed on the baffle 303. By cooperating with the adjusting nut 305 and the threaded portion 304 at the end of the vertical guide rail, the operator can adjust the position of the baffle 303 on the vertical guide rail, thereby controlling the compression amount of the spring 302 to adapt to the vibration force generated by different types of carbon fiber bundles under the action of the yarn-unrolling roller group 11. In order to ensure the fixing effect of the baffle 303, a fixing nut 306 that is threadedly engaged with the threaded portion 304 is provided above the adjusting nut 305. The fixing nut 306 and the adjusting nut 305 realize the positioning and locking of the baffle 303.

[0028] like Figure 3 As shown, a pressure equalizing plate 501 is fixed to the notch of the blowing slot 5, and a plurality of air guide holes are formed on the pressure equalizing plate 501; a collection plate 402 is fixed to the notch of the collecting slot 4, and a plurality of strip holes 403 are formed on the collection plate 402. The pressure equalizing plate 501, which is connected to the air guide holes, is installed at the notch of the blowing slot 5 to evenly blow the air introduced by the blower 7 toward the carbon fiber loose yarn below, while the collection plate 402, which is provided with strip holes 403, is installed at the notch of the collecting slot 4 to provide a uniform exhaust airflow to the carbon fiber loose yarn above, thereby ensuring the cleaning and collection of broken yarns.

[0029] Further preferably, in order to effectively collect the scattered yarn blown down, the air inlet of the exhaust fan 6 is connected to the collection tank 4 through the return air duct 401, the air outlet of the exhaust fan 6 is sleeved with a filter bag 601, and the top of the collection tank 4 is formed with an annular baffle 404 arranged around the outside of the collection plate 402. Specifically, in order to avoid the carbon fiber scattered yarn guided by the guide roller 8 from interfering with the collection tank 4 during the process of entering the composite roller group 12, the end face height of the annular baffle 404 is less than the surface height of the guide roller 8.

[0030] When implementing this technical solution, if Figure 1As shown, the auxiliary device is installed between the yarn spreading roller group 11 and the composite roller group 12, wherein the collecting trough 4 is welded to the side of the frame 1 away from the yarn spreading roller group 11, and the blowing trough 5 is welded to the top of the frame 1 through a bracket. The carbon fiber loose yarn led out from the discharge port of the yarn spreading roller group 11 passes around the first adjusting roller, the second adjusting roller, the third adjusting roller and the guide roller 8 in turn, and enters the composite roller group 12 through the channel between the blowing trough 5 and the collecting trough 4. After the entire yarn spreading equipment is running, the up, down, left and right vibration forces generated by the yarn spreading roller group 11 are offset at the three adjusting rollers 2, thereby ensuring that the carbon fiber loose yarn stably enters the composite roller group 12 for heating and compounding. At the same time, under the action of the airflow formed by the blower 7 and the exhaust fan 6, the broken yarn on the carbon fiber loose yarn is continuously cleaned and falls into the collecting trough 4, and is finally collected by the exhaust fan 6 into the filter bag 601, thereby ensuring the quality of the final synthesized carbon fiber prepreg.

Claims

1. A carbon fiber yarn spreading auxiliary device, located between the yarn spreading roller group and the composite roller group, characterized in that: It includes a vibration-absorbing mechanism and a broken yarn collecting mechanism arranged side by side along the carbon fiber loose yarn path, the vibration-absorbing mechanism includes a frame and multiple adjusting rollers on the horizontally arranged frame, the adjusting rollers are arranged vertically staggered, and the two ends of the adjusting rollers are movably connected to the frame through buffer components, the broken yarn collecting mechanism includes a blowing trough located above the carbon fiber loose yarn path and a collecting trough located below the carbon fiber loose yarn path, the notches of the blowing trough and the collecting trough are arranged opposite to each other, a blower connected to the blowing trough is provided on the outside of the blowing trough, and an exhaust fan connected to the collecting trough is provided on the outside of the collecting trough.

2. A carbon fiber yarn spreading auxiliary device according to claim 1, characterized in that: The broken yarn collecting mechanism is located on the side of the feed port of the composite roller group, the vibration elimination mechanism is located on the side of the discharge port of the yarn spreading roller group, and a guide roller is provided at a position of the frame away from the yarn spreading roller group. Both ends of the guide roller are rotatably connected to the frame via a bearing seat.

3. A carbon fiber yarn spreading auxiliary device according to claim 2, characterized in that: There are at least three adjusting rollers, which are divided into a first adjusting roller, a second adjusting roller and a third adjusting roller in sequence along the direction close to the yarn spreading roller group. The second adjusting roller is located above the first adjusting roller and the second adjusting roller.

4. A carbon fiber yarn spreading auxiliary device according to any one of claims 1 to 3, characterized in that: The buffer assembly includes a vertical guide rail, a slider, a baffle and a spring. The vertical guide rail in the buffer assembly at the same end of each adjusting roller is fixed to the inner side of the frame via a pressure seat. The sliders in the buffer assembly at both ends of the same adjusting roller are rotatably connected to the adjusting roller via bearing seats. The slider is slidably connected to the vertical guide rail. The baffle is relatively fixed to the end of the vertical guide rail away from the pressure seat. The spring is sleeved on the vertical guide rail. One end of the spring is against the slider, and the other end of the spring is against the baffle / pressure seat.

5. The carbon fiber yarn spreading auxiliary device according to claim 2, characterized in that: The surface height of the guide roller is consistent with the height of the inlet of the composite roller group.

6. A carbon fiber yarn spreading auxiliary device according to claim 1, 2, 3 or 5, characterized in that: A pressure equalizing plate is fixed at the notch of the blowing slot, and a plurality of air guide holes are opened on the pressure equalizing plate.

7. A carbon fiber yarn spreading auxiliary device according to claim 2, 3 or 5, characterized in that: A collecting plate is fixed at the notch of the collecting tank, and a plurality of strip-shaped holes are opened on the collecting plate.

8. The carbon fiber yarn spreading auxiliary device according to claim 7, characterized in that: An annular baffle is formed on the top of the collecting trough and is arranged around the outside of the collecting plate. The end surface height of the annular baffle is smaller than the surface height of the guide roller.

9. A carbon fiber yarn spreading auxiliary device according to claim 1, 2, 3 or 5, characterized in that: The air inlet of the exhaust fan is connected to the collecting tank through the return air pipe, and the air outlet of the exhaust fan is sleeved with a filter bag.

10. The carbon fiber yarn spreading auxiliary device according to claim 4, characterized in that: A threaded portion is formed on one end of the vertical guide rail away from the pressure-bearing seat, the baffle is sleeved on the outside of the threaded portion through a through opening, and an adjusting nut matched with the threaded portion is installed on the baffle.

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