Fiber prepreg preparation device and fiber prepreg preparation method

Abstract

The present invention discloses a fiber prepreg preparation device and a fiber prepreg preparation method. The fiber prepreg preparation device includes at least one prepreg preparation unit; the prepreg preparation unit includes a medium container for storing a medium, a positioning plate arranged in the medium container, a plurality of fiber positioning posts arranged on the positioning plate at intervals along the traveling direction of continuous fiber multifilaments, and a medium content control member arranged on the medium container; the two ends of the medium container respectively form an inlet end and an outlet end for the continuous fiber multifilaments to enter and exit; the medium content control member is located on the outlet end to control the medium content on the continuous fiber multifilaments. The fiber prepreg preparation device of the present invention, with a modular unit setting, can realize uninterrupted and continuous supply of fibers, flexibly switch the mode from small-scale processing to large-scale processing, and meet the purpose of continuous preparation of fiber prepregs.

Description

Technical Field

[0001] The present invention relates to the technical field of prepregs, and in particular to a fiber prepreg preparation device and a fiber prepreg preparation method. Background Art

[0002] At present, continuous fiber multifilaments are used in many fields, and usually, these continuous fiber multifilaments need to be treated with surface coating, medium immersion, etc. to prepare them into prepregs for use. However, although traditional large-scale equipment (such as textile industry equipment) has strong continuity, it usually only processes large batches of multi-filament bundles in parallel; while small-scale equipment (such as various laboratory simulation equipment) can only process very small amounts and is difficult to prepare continuously. Based on the limitations of the above factors and the needs of actual processes, it is necessary to design a device that can flexibly switch from small amounts to large amounts and can prepare continuously without interruption. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a fiber prepreg preparation device and a fiber prepreg preparation method which can improve operation fluency and efficiency.

[0004] The technical solution adopted by the present invention to solve the technical problem is: to provide a fiber prepreg preparation device, comprising at least one prepreg preparation unit; the prepreg preparation unit comprises a medium container for storing a medium, a positioning plate arranged in the medium container, a plurality of fiber positioning posts arranged on the positioning plate at intervals along the running direction of the continuous fiber multifilament, and a medium content control member arranged on the medium container;

[0005] The two ends of the medium container respectively form an inlet end and an outlet end for the continuous fiber multifilaments to enter and exit; the medium content control member is located on the outlet end to control the medium content on the continuous fiber multifilaments.

[0006] Preferably, the positioning plate is detachably inserted into the medium container.

[0007] Preferably, a slot for cooperating with the positioning plate is provided in the medium container.

[0008] Preferably, the fiber positioning column comprises a cylinder; the cylinder is provided with a groove arranged around the cylinder to form a fiber positioning groove.

[0009] Preferably, the plurality of fiber positioning posts include at least one first positioning post, at least one second positioning post and at least one third positioning post;

[0010] The first positioning column and the second positioning column are respectively arranged on the opposite ends of the positioning plate corresponding to the inlet end and the outlet end of the medium container; the third positioning column is arranged between the first positioning column and the second positioning column, and is located below the first positioning column and the second positioning column to be immersed in the medium.

[0011] Preferably, the medium content control member comprises a column, and through holes disposed in the column and penetrating two opposite end surfaces thereof; the axial direction of the through holes is parallel to the traveling direction of the continuous fiber multifilaments.

[0012] Preferably, the through hole comprises a guide section facing the inlet end of the medium container and an equal-diameter section connected to the guide section; the inner diameter of the guide section gradually increases from one end connected to the equal-diameter section to the other end opposite thereto.

[0013] Preferably, a support member is provided on the outlet end of the medium container, and the medium content control member is installed on the support member.

[0014] Preferably, the support member is a support plate, and a medium reflux groove is provided on one side of the support plate facing the inlet end; the medium reflux groove corresponds to one side of the through hole.

[0015] The present invention also provides a method for preparing a fiber prepreg, comprising the following steps:

[0016] S1. Continuous fiber multifilament is released from the pay-off device, enters the medium container from the inlet end thereof and sequentially passes around several fiber positioning posts on the positioning plate;

[0017] S2. Under the traction of the traction device, the continuous fiber multifilament is immersed in the medium in the medium container and then output from the outlet end of the medium container through the medium content control member.

[0018] The beneficial effects of the present invention are as follows: with the modular unit setting, it is possible to realize uninterrupted and continuous supply of fibers, flexibly switch the mode from small-scale processing to large-scale processing, and meet the purpose of continuously preparing fiber prepregs. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments, in which:

[0020] Figure 1 It is a schematic structural diagram of the arrangement of multiple prepreg preparation units of a fiber prepreg preparation device according to an embodiment of the present invention;

[0021] Figure 2 It is a structural schematic diagram of a prepreg preparation unit in a fiber prepreg preparation device according to an embodiment of the present invention;

[0022] Figure 3 yes Figure 2A schematic diagram of the exploded structure of the prepreg preparation unit shown;

[0023] Figure 4 It is a schematic diagram of the traveling direction of the continuous fiber multifilaments through the prepreg preparation unit in the present invention. DETAILED DESCRIPTION

[0024] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0025] like Figure 1 As shown, a fiber prepreg preparation device according to an embodiment of the present invention comprises at least one prepreg preparation unit 10. When the fiber prepreg preparation device comprises a plurality of prepreg preparation units 10, the plurality of prepreg preparation units 10 may be arranged in parallel and side by side, and all or some of them may be used simultaneously when preparing the fiber prepreg.

[0026] like Figure 2 , 3 As shown, the prepreg preparation unit 10 may include a medium container 1, a positioning plate 2, a plurality of fiber positioning columns 3 and a medium content control member 4. The medium container 1 is used to store the medium, and the two ends of the medium container 1 respectively form an inlet end and an outlet end for the continuous fiber multifilament to enter and exit. According to the requirements, the medium can be silanol, bisphenol A type epoxy resin, etc., which is used to be impregnated into the continuous fiber multifilament to form a prepreg. The continuous fiber multifilament includes but is not limited to nylon fiber, cotton thread, stainless steel fiber, carbon fiber and glass fiber.

[0027] The positioning plate 2 is arranged in the medium container 1, and the whole plate can enter the medium container 1, or only the lower part enters the medium container 1 and can be immersed in the medium. Several fiber positioning posts 3 are arranged on the positioning plate 2 at intervals along the traveling direction of the continuous fiber multifilaments, and the continuous fiber multifilaments successively bypass the several fiber positioning posts 3 and are immersed in the medium. The medium content control member 4 is arranged on the outlet end of the medium container 1 to control the medium content on the continuous fiber multifilaments.

[0028] Specifically, the medium container 1, as a container for containing the medium, can be set with an open top, so that the medium can be added into it at any time when preparing the prepreg. The medium container 1 can also be heated to achieve heating of the medium. For example, a heating element is installed on the medium container 1, or an interlayer is set in the medium container 1, and a heating medium such as water or oil can be injected into the interlayer, or the medium container 1 can be placed in a water bath or oil bath equipment, so as to heat the medium container 1 directly, or by water bath, oil bath, atmosphere heating, etc.

[0029] The shape and size of the medium container 1 are not limited. Figure 2 The rectangular structure shown.

[0030] The positioning plate 2 is mainly used to fix the fiber positioning column 3 to realize the positioning of the fiber positioning column 3 in the medium container 1. As an option, the positioning plate 2 is plugged into the medium container 1 in a detachable manner, so as to facilitate replacement at any time.

[0031] In this embodiment, a slot 11 for cooperating with the positioning plate 2 is provided in the medium container 1, and the positioning plate 2 can be inserted into the slot 11 by cooperating with the two ends, so as to be positioned in the medium container 1. Specifically, a limiting plate 12 is provided in the inlet end and the outlet end of the medium container 1, respectively, and the two limiting plates 12 are spaced from the inner wall surface of the medium container 1 on one side, and the slot 11 is formed between the limiting plate 12 and the corresponding inner wall surface. The limiting plate 12 does not need to be set very large, and the formed slot 11 only needs to be able to cooperate with the edge portion of the positioning plate 2 to limit the positioning plate 2 in the medium container 1, and will not block a large area of ​​the positioning plate 2, and will not affect the arrangement of the fiber positioning column 3 thereon.

[0032] The fiber positioning post 3 is used to position and guide the continuous fiber multifilaments. For multiple fiber positioning posts 3, the continuous fiber multifilaments can be wrapped in a staggered manner, such as wrapping around the top of a fiber positioning post 3 and then around the bottom of another adjacent fiber positioning post 3. When the continuous fiber multifilaments are pulled forward, the squeezing effect generated by the pulling provides a certain medium impregnation force, which allows the medium to penetrate into the fiber multifilaments.

[0033] In terms of structure, each fiber positioning column 3 may include a cylindrical body 31; the cylindrical body 31 is provided with grooves arranged around the cylindrical body 31 to form a fiber positioning groove 32. When the continuous fiber multifilaments pass around the fiber positioning column 3, they mainly pass through the fiber positioning groove 32. The annular protrusions formed on both sides of the fiber positioning groove 32 restrict the continuous fiber multifilaments from moving axially along the cylindrical body 31 and coming out.

[0034] According to the arrangement positions of the fiber positioning posts 3 on the positioning plate 2, the plurality of fiber positioning posts 3 may include at least one first positioning post 33, at least one second positioning post 34 and at least one third positioning post 35. The first positioning post 33 and the second positioning post 34 are respectively arranged on the opposite ends of the positioning plate 2 corresponding to the inlet end and the outlet end of the medium container 1, and are mainly used for positioning and guiding the continuous fiber multifilaments to enter and exit the medium container 1. The first positioning post 33 and the second positioning post 34 may be above the liquid level of the medium. The third positioning post 35 is arranged between the first positioning post 33 and the second positioning post 34, and is located below the first positioning post 33 and the second positioning post 34 to be immersed in the medium, and is mainly used for positioning and guiding the continuous fiber multifilaments to be immersed in the medium in the medium container 1.

[0035] The first positioning post 33 , the second positioning post 34 and the third positioning post 35 have the same structure, and all include a cylindrical body 31 and a fiber positioning groove 32 .

[0036] The medium content control element 4 is used to control the medium content impregnated on the continuous fiber multifilament, ranging from 10% to 90%. Figure 3 As shown, in this embodiment, the medium content control member 4 includes a column 41 and a through hole 42 disposed in the column 41 and penetrating the two opposite end surfaces thereof. The axial direction of the through hole 42 is parallel to the traveling direction of the continuous fiber multifilaments, and is used for the continuous fiber multifilaments impregnated with the medium to pass through. When the continuous fiber multifilaments pass through the through hole 42, the excess medium will be squeezed out and flow back into the medium container 1, and the through hole 42 can also provide a certain impregnation force to further impregnate the medium into the continuous fiber multifilaments.

[0037] The pore size of the through hole 42 is selected based on the combination of the fiber type, the medium type and the target content of the medium. The second positioning column 34 can be located at the same level as the through hole 42.

[0038] Furthermore, if Figure 4 As shown, the through hole 42 may include a guide section 421 facing the inlet end of the medium container 1 and a constant diameter section 422 connected to the guide section 421. The inner diameter of the guide section 421 gradually increases from one end connected to the constant diameter section 422 to the other end opposite thereto, and is in a trumpet shape. The continuous fiber multifilament enters the through hole 42 from the guide section 421, and enters the constant diameter section 422 along the guide section 421 with a reduced inner diameter. The excess medium on the guide section 421 is squeezed into the guide section 421 by the wall of the constant diameter section 422, and can flow back into the medium container 1 along the guide section 421.

[0039] In addition, as required, a heating element may be provided on the medium content control element 4 to heat it, or an interlayer may be provided to inject water or oil, etc., and the medium content control element 4 may be heated by water bath, oil bath or atmosphere heating, etc. When the medium is sensitive to changes in temperature and its fluidity drops suddenly due to low temperature, it needs to be heated. In this case, the medium content control element 4 may be heated, thereby heating the medium on the continuous fiber multifilaments passing through the medium content control element 4, so as to ensure that the medium can flow smoothly and cover the continuous fiber multifilaments, and will not block the through hole 42.

[0040] The medium content control member 4 can be directly fixed to the outlet end of the medium container 1 by means of a fastener or the like, or supported on the outlet end of the medium container 1 by means of a support member 5. Figure 2 , 3 As shown, a support member 5 is provided on the outlet end of the medium container 1 , and the medium content control member 4 is installed on the support member 5 .

[0041] In this embodiment, the support member 5 is a support plate of a disc-shaped structure, which can be fastened to the medium container 1 by fasteners such as bolts. A medium reflux groove 51 is provided on one side of the support plate facing the inlet end of the medium container 1. The medium reflux groove 51 corresponds to one side of the through hole 42, and connects the through hole 42 and the storage space of the medium container 1, so that the excess medium squeezed out from the through hole 42 can flow back into the medium container 1 through the medium reflux groove 51.

[0042] Of course, in other embodiments, the support member 5 may be a frame structure or a mesh plate, so that the medium flowing down the through hole 42 may directly flow back into the medium container 1 through the hollow position of the frame structure or the mesh holes on the mesh plate.

[0043] In addition, if Figure 2 , 3 As shown, in this embodiment, the medium container 1 is a rectangular parallelepiped structure, and one side of the outlet end thereof protrudes outward to form a guide portion 13, which is connected to the storage space of the medium container 1, and the medium content control member 4 is arranged on the guide portion 13. The inner wall surface of the guide portion 13 opposite to the inlet end of the medium container 1 is an inclined surface, so that the medium flowing down from the medium content control member 4 and / or the support member 5 can merge into the medium in the medium container 1 along the inclined surface of the guide portion 13.

[0044] When using the above-mentioned fiber prepreg preparation device to prepare prepreg, one or more prepreg preparation units 10 are selected and arranged together as needed, and the fiber prepreg preparation device is arranged between the pay-off device and the traction device according to the progress of the continuous fiber multifilament.

[0045] like Figure 3 , 4 As shown, the fiber prepreg preparation method of the present invention may include the following steps:

[0046] S1. Continuous fiber multifilaments are released from a pay-off device (not shown), enter the medium container 1 from the inlet end thereof, and pass around several fiber positioning posts 3 on the positioning plate 2 in sequence.

[0047] Specifically, the continuous fiber multifilament passes over the first positioning post 33 and moves downward to the third positioning post 35. After passing under the first third positioning post 35, it passes over the top of another adjacent third positioning post 35, and thus passes over several third positioning posts 35 in an alternating manner, and finally moves upward to the second positioning post 34, passes over the top of the second positioning post 34 and enters the medium content control element 4.

[0048] The continuous fiber multifilaments passing through the medium content control member 4 are wrapped around the traction device, and the continuous fiber multifilaments are driven to continuously travel by the traction of the traction device.

[0049] S2. Under the traction of a traction device (not shown), the continuous fiber multifilament is impregnated with a medium in the medium container 1 and then output from the outlet end of the medium container 1 through the medium content control member 4 to obtain a fiber prepreg.

[0050] The obtained fiber prepreg can be pelletized as required after drying, such as into pellets of 6-12 mm.

[0051] In the above preparation method, the continuous fiber multifilaments can be pre-wound around the fiber positioning column 3, and then connected to the positioning plate 2 and placed in the medium container 1. When impregnating the medium, the continuous fiber multifilaments can be replaced at any time by removing the positioning plate 2.

[0052] During preparation, at least two prepreg units are provided, each of which has continuous fiber multifilaments passing therethrough. A traction device may first traction the continuous fiber multifilaments of one prepreg unit, and the continuous fiber multifilaments of another prepreg unit as a continuation. After the continuous fiber multifilaments of the previous prepreg unit are about to be impregnated and traction is completed, the continuous fiber multifilaments of the next prepreg unit are tractioned and wound up by the traction device in succession to the continuous fiber multifilaments of the previous prepreg unit, thereby achieving the purpose of continuous preparation of fiber prepreg.

[0053] A drying device (such as a drying device) is also provided between the traction device and the outlet end of the medium container 1 to dry the continuous fiber multifilaments impregnated with the medium, so that the medium is solidified and combined with the continuous fiber multifilaments for winding.

[0054] The present invention is further described below by means of specific examples.

[0055] Example 1

[0056] The traction device includes a set of traction rollers to provide power for the movement of the fiber; the medium required for impregnating the stainless steel fiber is silanol dissolved in an ethanol system.

[0057] Two prepreg preparation units are selected for combination, and two stainless steel fibers to be processed are passed around the fiber positioning columns of the respective prepreg preparation units and through the respective medium content control parts. The stainless steel fibers passing through the medium content control parts are then passed through a channel drying device, which is used to dry the silanol impregnated on the stainless steel fibers and remove the ethanol therein.

[0058] During preparation, the traction device continuously pulls one stainless steel fiber on a prepreg preparation unit group. When the stainless steel fiber is about to be completely impregnated, the second stainless steel fiber prepared by another prepreg preparation unit can be quickly added to achieve a seamless connection effect. After the second stainless steel fiber begins to be pulled, the prepreg preparation unit used by the first stainless steel fiber enters an idle state, and the third stainless steel fiber is prepared additionally. And so on, to achieve the effect of continuous preparation of fiber prepreg.

[0059] Example 2

[0060] In the process, the front device needs to continuously transport 4 carbon fibers to cut the prepared prepreg into 6-12mm prepreg particles;

[0061] The traction device includes a set of traction rollers that can pull 4 fibers at the same time to provide power for the movement of the fibers; the medium that needs to be impregnated with the carbon fibers is bisphenol A epoxy resin. Since bisphenol A epoxy resin is solid at room temperature and needs to be heated to make it flow, the resin needs to be heated.

[0062] Eight prepreg preparation units are selected to be combined to form a prepreg preparation device, and the prepreg preparation device is placed in an oil bath environment with a temperature greater than or equal to 120°C. First, the 8 carbon fibers to be processed are passed around the fiber positioning columns of their respective prepreg preparation units and through the corresponding medium content control parts in turn. The traction device continuously pulls the 4 carbon fibers on four of the prepreg preparation units. When these 4 carbon fibers are about to be fully impregnated, the 4 carbon fibers of the other four prepreg preparation units can be quickly fed to achieve a seamless connection effect. After the subsequent 4 carbon fibers begin to be pulled, the four prepreg preparation units used by the 4 consumed carbon fibers enter an idle state, and an additional 4 carbon fibers can be prepared. And so on, to achieve the effect of continuous preparation of fiber prepregs.

[0063] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A fiber prepreg preparation device, characterized in that: The invention comprises a plurality of prepreg preparation units arranged in parallel and side by side; the prepreg preparation units comprise a medium container for storing a medium, a positioning plate arranged in the medium container, a plurality of fiber positioning posts arranged on the positioning plate at intervals along the running direction of continuous fiber multifilaments, and a medium content control member arranged on the medium container; The two ends of the medium container respectively form an inlet end and an outlet end for the continuous fiber multifilaments to enter and exit; the medium content control member is located on the outlet end to control the medium content on the continuous fiber multifilaments; The positioning plate is detachably inserted into the medium container; One side of the outlet end of the medium container protrudes outward to form a guide portion, the guide portion is connected to the storage space of the medium, and the medium content control component is arranged on the guide portion; the inner wall surface of the guide portion opposite to the inlet end of the medium container is an inclined surface.

2. The fiber prepreg preparation device according to claim 1, characterized in that: A slot for cooperating with the positioning plate is arranged in the medium container.

3. The fiber prepreg preparation device according to claim 1, characterized in that: The fiber positioning column comprises a cylindrical body; a groove is arranged around the cylindrical body to form a fiber positioning groove.

4. The fiber prepreg preparation device according to claim 1, characterized in that: The plurality of fiber positioning posts include at least one first positioning post, at least one second positioning post, and at least one third positioning post; The first positioning post and the second positioning post are respectively arranged on opposite ends of the positioning plate corresponding to the inlet end and the outlet end of the medium container; The third positioning column is arranged between the first positioning column and the second positioning column, and is located below the first positioning column and the second positioning column to be immersed in the medium.

5. The fiber prepreg preparation device according to claim 1, characterized in that: The medium content control member comprises a column and through holes arranged in the column and penetrating two opposite end surfaces thereof; the axial direction of the through holes is parallel to the traveling direction of the continuous fiber multifilament.

6. The fiber prepreg preparation device according to claim 5, characterized in that: The through hole comprises a guide section facing the inlet end of the medium container and an equal-diameter section connected to the guide section; the inner diameter of the guide section gradually increases from one end connected to the equal-diameter section to the other end opposite thereto.

7. The fiber prepreg preparation device according to claim 5, characterized in that: A support is provided on the outlet end of the medium container, and the medium content control component is installed on the support.

8. The fiber prepreg preparation device according to claim 7, characterized in that: The support member is a support plate, and a medium reflux groove is provided on one side of the support plate facing the inlet end; the medium reflux groove corresponds to one side of the through hole.

9. A method for preparing a fiber prepreg, characterized in that: The fiber prepreg preparation device according to any one of claims 1 to 8 is used, and the fiber prepreg preparation method comprises the following steps: S1. Continuous fiber multifilament is released from the pay-off device, enters the medium container from the inlet end thereof and sequentially passes around several fiber positioning posts on the positioning plate; S2. Under the traction of the traction device, the continuous fiber multifilament is immersed in the medium in the medium container and then output from the outlet end of the medium container through the medium content control member.

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