Yarn splitting plate, yarn splitting structure and preforming device
By designing an adjustable yarn splitting board, the problems of poor flexibility and difficult process caused by the structural fixation of existing preformed devices are solved, and the flexibility and stability of product quality are achieved to adapt to the production of pultruded sheets of various specifications are achieved.
Patent Information
- Application Number
- CN202420791641.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-17
- Publication Date
- 2025-03-25
- Estimated Expiration
- 2034-04-17
AI Technical Summary
The existing preformed devices have fixed structures and poor flexibility, making them difficult to adapt to the production of pultruded plates of different specifications, resulting in difficult process and unstable product quality.
A yarn splitting board is designed, including a substrate, a limiting part and a yarn splitting assembly. By adjusting the setting position, quantity and size of the yarn splitting rod, the number and thickness of the yarn splitting passages are flexibly adjusted, so that the yarn splitting board can be suitable for the production of preformed plates of various specifications.
Through this design, the flexibility and adaptability of the preforming device are improved, the process difficulty of fiber yarn layout is reduced, and the quality stability of the product is enhanced.
Smart Images
Figure CN222662732U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of preforming molds, in particular to a yarn splitting plate, a yarn splitting structure and a preforming device. Background Art
[0002] With the rapid development of the industrial industry, the quality requirements for industrial pultruded sheet products are gradually increasing, especially in the current application of wind power pultruded sheet, the thickness requirement for pultruded sheet has increased from the common 5-6mm to 8mm. Pultruded sheet with this thickness specification has high requirements in production process, and it is difficult to impregnate and arrange the fiber yarn. The one-time pultrusion process is prone to uneven yarn arrangement on the board surface, poor center curing, magenta penetration and high echo of non-destructive testing (NDT).
[0003] In the existing pultruded board production process, a preforming device can be used to first process the fiber yarn into a preformed board, and then the preformed board is subsequently processed to produce a pultruded board product, which can reduce the process difficulty and improve the product qualification rate. However, the preforming device currently used is usually a fixed structure and the device flexibility is poor. Utility Model Content
[0004] The utility model aims to overcome the above-mentioned deficiencies in the prior art and provides a yarn separation plate, a yarn separation structure and a preforming device.
[0005] According to a first aspect of the present application, there is provided a yarn separation plate, comprising:
[0006] A substrate, wherein a hollow area is provided on the substrate;
[0007] Limiting parts are arranged on two opposite sides of the hollow area and respectively enclosed with the substrate to form limiting grooves;
[0008] The yarn splitting assembly comprises a plurality of yarn splitting rods arranged along the extending direction of the limiting portion, wherein in a direction perpendicular to the base plate, the middle structure of the yarn splitting rods overlaps with the hollow area, and the end structure of the yarn splitting rods extends into the limiting groove;
[0009] Wherein, in the arrangement direction of the yarn splitting rods, the size of the end structure is larger than the size of the middle structure, and a yarn splitting channel is formed between adjacent yarn splitting rods.
[0010] In some embodiments, the intermediate structure and / or the end structure has a circular or racetrack-shaped radial cross-section.
[0011] In some embodiments, the yarn separation plate further comprises:
[0012] A pressing block, provided with a through hole penetrating the pressing block along the arrangement direction;
[0013] A first fastener passes through the through hole and abuts against the end structure.
[0014] In some embodiments, the yarn separation plate further comprises a baffle, which is disposed on a side of the base plate away from the limiting portion, and in a direction perpendicular to the base plate, the baffle and the yarn separation channel are staggered.
[0015] According to a second aspect of the present application, a yarn splitting structure is provided, the yarn splitting structure comprising at least one plywood plate and the yarn splitting plate as described in any one of the first aspects, wherein along the extension direction of the yarn splitting structure, the yarn splitting plate and the plywood plate are arranged in sequence, and the yarn splitting plate and the plywood plate are parallel to each other;
[0016] A yarn threading channel is provided in the middle of the plywood, the yarn threading channel is in the shape of an elongated strip and is parallel to the yarn separation channel. The number of yarn threading channels in the plywood is less than the number of yarn separation channels in the yarn separation plate. When the yarn separation structure includes a plurality of plywoods, the yarn threading channels on each plywood are reduced in sequence along the extension direction of the yarn separation structure.
[0017] The yarn separation structure also includes a connecting portion, and the yarn separation plate and the layer combination plate are both installed on the connecting portion.
[0018] In some embodiments, the yarn separation plate has four yarn separation channels;
[0019] The yarn separation structure includes a first plywood plate and a second plywood plate. Along the extension direction of the yarn separation structure, the yarn separation plate, the first plywood plate and the second plywood plate are arranged in sequence. The first plywood plate has two yarn threading channels, and the second plywood has one yarn threading channel.
[0020] In some embodiments, in at least one of the plywood plates, one end of the yarn threading channel facing the yarn separating plate is in a gradually narrowing trumpet shape along the extension direction of the yarn separating structure.
[0021] In some embodiments, the connecting portion includes two connecting plates arranged opposite to each other, the yarn separation plate is connected to the ends of the connecting plates, and the plywood is installed between the two connecting plates;
[0022] Along the extension direction of the yarn separation structure, a plurality of first hole positions are arranged on the connection plate, and the installation position of the plywood can be changed by connecting with different first hole positions.
[0023] In some embodiments, the yarn separation structure further includes a fixing rod corresponding to the plywood one-to-one, the fixing rod is connected to the lower end of the plywood, and both ends of the fixing rod are respectively fixed to the two connecting plates.
[0024] According to a third aspect of the present application, a preforming device is provided, the preforming device comprising a dipping tank and a pultrusion die, and a yarn separation structure as described in any one of the second aspects;
[0025] Along the extension direction of the yarn separation structure, the glue dipping tank, the yarn separation structure and the pultrusion die are connected in sequence;
[0026] Among them, the pultrusion die and the connecting part of the yarn separation structure are connected through a connecting block and a plurality of second fasteners, and through grooves are respectively provided at both ends of the connecting block. The second fasteners pass through the through grooves and are connected to the pultrusion die or the connecting part, and the through grooves are straight groove structures.
[0027] The beneficial effects of the utility model are:
[0028] In the yarn separating plate provided by the utility model, by changing the setting position, number and size of the yarn separating rods in the yarn separating plate, the number of yarn separating channels in the yarn separating plate and the thickness of each yarn separating channel can be flexibly adjusted, so that the yarn separating plate can be suitable for producing preformed plates of various specifications. BRIEF DESCRIPTION OF THE DRAWINGS
[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.
[0030] Figure 1 is a schematic diagram of a yarn separation plate according to an exemplary embodiment;
[0031] Figure 2 is an exploded schematic diagram of a yarn separation plate according to an exemplary embodiment;
[0032] Figure 3 is a schematic diagram of a yarn separation structure according to an exemplary embodiment;
[0033] Figure 4 is a cross-sectional view of a laminated plate according to an exemplary embodiment;
[0034] Figure 5 is a schematic diagram showing the cooperation of a laminated plate, a connecting portion and a fixing rod according to an exemplary embodiment;
[0035] Figure 6is a schematic diagram of a preforming device according to an exemplary embodiment;
[0036] Figure 7 It is a partial schematic diagram of a preforming device according to an exemplary embodiment.
[0037] In the figure: 1-yarn dividing plate; 11-base plate; 110-hollow area; 12-limiting part; 120-limiting groove; 13-yarn dividing rod; 130-yarn dividing channel; 131-middle structure; 132-end structure; 14-pressing block; 15-first fastener; 16-baffle; 2-yarn dividing structure; 21-first plywood; 210-first yarn threading channel; 22-second plywood; 220-second yarn threading channel; 23-connecting part; 231-connecting plate; 232-first hole position; 24-fixing rod; 31-glue dipping tank; 32-pultrusion die; 33-connecting block; 330-through groove. DETAILED DESCRIPTION
[0038] Existing preforming devices are usually fixed structures, and different specifications of preforming devices are often required to produce pultruded plates of different specifications, which is not conducive to improving production efficiency. Even though some preforming devices with adjustment functions have appeared, their adjustment functions are still mainly limited to adjusting the spacing between each layer, and their adaptability to different pultruded plate products is still relatively limited.
[0039] In order to solve the problems existing in the related art, the present application provides a yarn splitting plate, a yarn splitting structure and a preforming device. Among them, the yarn splitting plate includes a base plate, a limiting portion and a yarn splitting assembly. The base plate is provided with a hollow area, the limiting portion is arranged on the opposite sides of the hollow area and respectively encloses the base plate to form a limiting groove, and the yarn splitting assembly includes a plurality of yarn splitting rods arranged along the extension direction of the limiting portion. The middle structure of the yarn splitting rod coincides with the hollow area in a direction perpendicular to the base plate, and its size is smaller than the size of the end structure of the yarn splitting rod in the arrangement direction of the yarn splitting rod, so that a yarn splitting channel is formed between adjacent yarn splitting rods, and the end structure of the yarn splitting rod extends into the limiting groove and can slide along the extension direction of the limiting portion. By changing the setting position, number and size of the yarn splitting rods in the yarn splitting plate, the number of yarn splitting channels in the yarn splitting plate and the thickness of each yarn splitting channel can be flexibly adjusted, so that the yarn splitting plate can be suitable for the production of preformed plates of various specifications.
[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of the present utility model.
[0041] like Figure 1 and Figure 2 As shown, this embodiment provides a yarn splitting plate 1, including a base plate 11, a limiting portion 12 and a yarn splitting assembly. The base plate 11 is provided with a hollow area 110, which can be used as a candidate area for a yarn splitting channel on the yarn splitting plate 1. The hollow area 110 can have a variety of shapes, setting areas and setting quantities, for example, Figure 2 The figure shows a rectangular hollow formed by the top surface of the substrate 11 being recessed toward the bottom surface, but this is not limited to this.
[0042] like Figure 1 and Figure 2 As shown, the limiting portions 12 are disposed on opposite sides of the hollow region 110 and respectively enclose the substrate 11 to form limiting grooves 120, wherein the opposite sides may refer to two sides in any direction parallel to the hollow region 110. In one example, reference Figure 1 and Figure 2 The limiting portion 12 is disposed in the hollow area 110 in the horizontal direction ( Figure 2 The limiting groove 120 extends in the vertical direction ( Figure 2 In the vertical direction, the size of the limiting groove 120 remains unchanged, which facilitates sliding.
[0043] like Figure 1 and Figure 2 As shown, the yarn separation assembly includes an extension direction ( Figure 2 The end structure 132 of the yarn splitting rod 13 extends into the limiting groove 120, that is, the yarn splitting rod 13 can cross the hollow area 110 and slide relative to the hollow area 110, and the middle structure 131 of the yarn splitting rod 13 is perpendicular to the direction of the substrate 11 ( Figure 2 The end structure 132 coincides with the hollow area 110 in the x direction as shown, wherein in the arrangement direction of the yarn splitting rods 13 , the size of the end structure 132 is larger than the size of the middle structure 131 , and a yarn splitting channel 130 is formed between adjacent yarn splitting rods 13 .
[0044] As an example, refer to Figure 1 and Figure 2 The yarn separation assembly includes a yarn separation assembly along the vertical direction ( Figure 2There are four yarn splitting rods 13 arranged in the x direction (as shown in the figure). In the vertical direction, the end structure 132 of the yarn splitting rod 13 has a larger size than the middle structure 131. When the yarn splitting rods 13 are arranged in sequence along the vertical direction, the end structures 132 in adjacent yarn splitting rods 13 are abutted in sequence. At the same time, a gap is formed between the middle structures 131 of every two adjacent yarn splitting rods 13, which coincides with the hollow area 110 in the direction perpendicular to the substrate 11. The fiber yarn can pass through the substrate 11 through the gap. The gap is the yarn splitting channel 130 of the fiber yarn. In addition, in addition to the yarn splitting channel 130 that can be formed between adjacent yarn splitting rods 13, the yarn splitting channel 130 can also be formed between the sides of the yarn splitting rods 13 and the substrate 11, for example, Figure 1 As shown, a yarn separation channel 130 is also formed between the yarn separation rod 13 at the bottom end in the vertical direction and the bottom edge of the hollow area 110. Figure 1 The illustrated yarn separating plate 1 has four yarn separating channels 130 .
[0045] Continue to refer Figure 1 and Figure 2 When the two end structures 132 of the yarn dividing rod 13 are taken out or put into the limiting groove 120, the number of the yarn dividing channels 130 changes accordingly. At the same time, when the two end structures 132 of the yarn dividing rod 13 slide synchronously in the limiting groove 120, the thickness of the yarn dividing channel 130 also changes accordingly. In addition, the thickness of the yarn dividing channel 130 can be changed by adjusting the relative sizes of the end structure 132 and the middle structure 131 in the yarn dividing rod 13, so that the yarn dividing plate 1 can be suitable for the production of preformed plates of various specifications by only adjusting the yarn dividing rod 13.
[0046] In one embodiment, if Figure 2 As shown, the radial cross-sections of the intermediate structure 121 and the end structure 132 are circular or racetrack-shaped. Figure 2 As shown, the radial cross-sections of the middle structure 121 and the end structure 132 are both runway-shaped, and the two relative surfaces between adjacent yarn splitting rods 13 are both smooth arc surfaces, so as to prevent the resin glue in the fiber yarn from being scratched by its uneven edges when the fiber yarn passes through the yarn splitting channel 130 at a certain preset angle.
[0047] In one embodiment, if Figure 1 and Figure 2 As shown, the yarn separation plate 1 further includes a pressing block 14 and a first fastener 15, wherein the pressing block 14 is provided with a first fastener 15 along the arrangement direction of the yarn separation rods 13 ( Figure 2 The first fastener 15 passes through the through hole of the pressing block 14 and abuts against the end structure 132 of the yarn separation rod 13. Figure 1 and Figure 2, the clamping block 14 is arranged above the yarn splitting rod 13, and the first fastener 15 abuts against the yarn splitting rod 13 from top to bottom. Of course, the clamping block 14 can also be arranged below the yarn splitting rod 13, and the first fastener 15 abuts against the yarn splitting rod 13 from bottom to top. A set of clamping blocks 14 and first fasteners 15 can also be arranged above and below the yarn splitting assembly, and there is no limitation to this. The through hole can be, for example, a threaded hole, and the first fastener 15 can be, for example, a bolt corresponding to the through hole. The first fastener 15 squeezes the yarn splitting rod 13 to prevent the yarn splitting rod 13 from being displaced, thereby maintaining the shape of the yarn splitting channel 130 stable. In the extension direction of the clamping block 14 ( Figure 2 In the y direction as shown, a plurality of first fasteners 15 may be provided, and there is no limitation to this.
[0048] In one embodiment, if Figure 1 and Figure 2 As shown, the yarn separation plate 1 further includes a baffle 16, which is arranged on a side of the base plate 11 away from the limiting portion 12, in a direction perpendicular to the base plate 11 ( Figure 2 In the x direction shown in FIG. 1 , the baffle 16 and the yarn separation channel 130 are staggered. As an example, Figure 1 , Figure 2 and Figure 6 As shown, when the yarn separation plate 1 is directly connected to the cavity of the dipping tank 31, in order to prevent the resin glue from leaking out of the hollow area 110, a baffle 16 can be set to block the glue. The baffle 16 is set on the side of the substrate 11 away from the limiting portion 12 to be as close to the substrate 11 as possible, reducing the gap between the baffle 16 and the substrate 11. The baffle 16 can also be staggered with the yarn separation channel 130 in a direction perpendicular to the substrate 11 to prevent the baffle 16 from blocking the yarn separation channel 130 and hindering the yarn separation. The number and specific shape of the baffle 16 can be set according to the hollow area 110, and are not limited here.
[0049] like Figure 1 and Figure 3 As shown, this embodiment provides a yarn separation structure 2, the yarn separation structure 2 includes at least one plywood, and the yarn separation plate 1 in any of the above embodiments, along the extension direction of the yarn separation structure ( Figure 3 +x direction as shown), the yarn separation plate 1 and the plywood are arranged in sequence and parallel to each other. Among them, the plywood is used to merge the multiple layers of fiber yarns passing through the yarn separation plate 1. A yarn threading channel is opened in the middle of the plywood. The yarn threading channel is in the shape of a long strip and is parallel to the yarn separation channel 130. The number of yarn threading channels in the plywood is less than the number of yarn separation channels 130 in the yarn separation plate 1. However, when the yarn separation structure 2 includes multiple plywoods, the number of yarn threading channels on each plywood is reduced in sequence along the extension direction of the yarn separation structure 2. In addition, the yarn separation structure 2 also includes a connecting portion 2323, and the yarn separation plate 1 and the plywood are both installed on the connecting portion 23.
[0050] As an example, refer to Figure 1and Figure 3 The yarn separation structure 2 includes multiple ply plates and a yarn separation plate 1. Along the extension direction of the yarn separation structure 2, the fiber yarn passes through the yarn separation channel 130 and the synthetic channel on each ply plate in sequence. As the number of channels decreases, the multiple layers of fiber yarn gradually merge. By changing the order and position of the ply plates or replacing the ply plates, the ply process of the fiber yarn can be flexibly adjusted according to the production requirements of the preformed pultruded plate, which effectively reduces the process difficulty of the fiber yarn arrangement and is conducive to the uniform infiltration of the resin glue on the fiber yarn.
[0051] In one embodiment, if Figure 1 and Figure 3 As shown, the yarn separation plate 1 has four yarn separation channels 130, and the yarn separation structure 2 includes a first plywood plate 21 and a second plywood plate 22. Figure 3 +x direction as shown), the yarn separation plate 1, the first plywood 21 and the second plywood 22 are arranged in sequence, and the first plywood 21 has two yarn threading channels ( Figure 3 The first yarn threading channel 210 is shown, and the second laminate plate 22 is provided with a yarn threading channel ( Figure 3 As shown in the second yarn threading channel 220). As a result, the fiber yarns pass through the yarn separation plate 1 to form four layers of fiber yarns stacked up and down, pass through the first yarn threading channel 210, and are combined into two layers of yarn by the first layering plate 21, and continue to pass through the second yarn threading channel 220 and are combined into one layer of yarn by the second layering plate 22, thereby achieving the goal of combining the scattered fiber yarns into a whole according to a certain arrangement.
[0052] In one embodiment, if Figure 3 and Figure 4 As shown, in at least one plywood, one end of the yarn threading channel facing the yarn separation plate 1 is along the extension direction of the yarn separation structure 2 ( Figure 4 The first laminated plate 21 is taken as an example, and the Figure 4 The first yarn threading channel 210 is located at one end of the yarn separation plate 1. Figure 4 -x direction end, the structure is along Figure 4 The +x direction shown gradually narrows and appears as a trumpet-shaped structure in the cross-sectional view. Since the fiber yarn is merged into one layer from multiple layers in the yarn threading channel, the fiber yarn usually enters the yarn threading channel at a certain inclination angle. The trumpet-shaped structure can make the side wall at the entrance of the yarn threading channel maintain a similar inclination angle with the fiber yarn, thereby avoiding scratches on the fiber yarn by the side wall.
[0053] In one embodiment, if Figure 3 As shown, the connecting portion 23 includes two connecting plates 231 arranged opposite to each other, the yarn separation plate 1 is connected to the ends of the connecting plates 231, and the plywood is installed between the two connecting plates 231. Figure 3 A plurality of first holes 232 are provided on the connecting plate 231 (in the +x direction shown in FIG. 1 ), and the laminated plate can be connected to different first holes 232 to change the installation position. Figure 3 As shown, a rear mounting structure is provided at the top of the laminated plate, and the mounting structure has a through hole that is connected to the first hole position 232 and has the same specifications. The third fastener can pass through the through hole and be fixed in the first hole position 232, thereby realizing the installation of the laminated plate. When the installation position of the laminated plate needs to be changed, the third fastener only needs to be removed and re-fixed in other first hole positions 232, so as to facilitate the adjustment of the spacing of the yarn threading channels according to process requirements.
[0054] In one embodiment, if Figure 5 As shown, the yarn separation structure 2 also includes a fixing rod 24 corresponding to the plywood, the fixing rod 24 is connected to the lower end of the plywood, and the two ends of the fixing rod 24 are respectively fixed to the two connecting plates 231. As an example, Figure 5 As shown, the fixing rod 24 can be a rod-shaped structure such as a round rod or a square rod. When the two ends of the fixing rod 24 are respectively fixed to the two connecting plates 231, the fixing rod 24 can provide fixation and support for the laminated plate, making the installation of the laminated plate more stable and preventing the laminated plate from being displaced due to the pulling force in the pulling direction. At the same time, the fixing rod 24 and the laminated plate are separate structures, which is convenient for removing the laminated plate from between the two connecting plates 231 when disassembling the laminated plate.
[0055] like Figure 6 As shown, this embodiment provides a preforming device, including a dipping tank 31 and a pultrusion die 32, and a yarn separation structure 2 as in any of the above embodiments. The outlet of the dipping tank 31 is connected to the yarn separation plate 1, and the yarn inlet of the pultrusion die 32 is connected to the end of the connecting part 23 away from the yarn separation plate 1. Figure 6 The fiber yarn passes through the resin dipping tank 31, the yarn separation structure 2 and the pultrusion die 32 in sequence to complete the resin dipping, yarn separation, layering and preforming processes in sequence to obtain a preformed pultruded board.
[0056] like Figure 6 and Figure 7As shown, the pultrusion die 32 is connected to the connection part 23 of the yarn separation structure 2 through a connection block 33 and a plurality of second fasteners, and through slots 330 are respectively provided at both ends of the connection block 33. The second fasteners respectively penetrate through the two through slots 330 and are connected to the pultrusion die 32 or the connection part 23, and the through slots 330 are straight slot structures. The straight slot structure of the through slots 330 enables the pultrusion die 32 and the connection part 23 to adjust their relative heights by simply pushing the connection block 33 up and down in the installed and connected state, which facilitates the adjustment of the preforming device so that the fiber yarn can enter the pultrusion die 32 at an angle perpendicular to the entrance of the pultrusion die 32, which is conducive to ensuring the straightness of the preformed pultruded plate.
[0057] The contents described in the embodiments of this specification are merely an enumeration of the implementation forms of the utility model concept. The protection scope of the utility model should not be deemed to be limited to the specific forms described in the embodiments. The protection scope of the utility model also includes equivalent technical means that can be thought of by technical personnel in this field based on the concept of the utility model.
Claims
1. A yarn separation plate, characterized in that: The yarn separation plate comprises: A substrate, wherein a hollow area is provided on the substrate; Limiting parts are arranged at two opposite sides of the hollow area and respectively enclosed with the substrate to form limiting grooves; The yarn splitting assembly comprises a plurality of yarn splitting rods arranged along the extending direction of the limiting portion, wherein in a direction perpendicular to the base plate, the middle structure of the yarn splitting rods overlaps with the hollow area, and the end structure of the yarn splitting rods extends into the limiting groove; Wherein, in the arrangement direction of the yarn splitting rods, the size of the end structure is larger than the size of the middle structure, and a yarn splitting channel is formed between adjacent yarn splitting rods.
2. The yarn separation plate according to claim 1, characterized in that: The radial cross-section of the intermediate structure and / or the end structure is circular or racetrack-shaped.
3. The yarn separation plate according to claim 1, characterized in that: The yarn separation plate also includes: A pressing block, provided with a through hole penetrating the pressing block along the arrangement direction; A first fastener passes through the through hole and abuts against the end structure.
4. The yarn separation plate according to claim 1, characterized in that: The yarn separation plate further comprises a baffle, which is arranged on a side of the base plate away from the limiting portion, and in a direction perpendicular to the base plate, the baffle and the yarn separation channel are staggered.
5. A yarn splitting structure, characterized in that: The yarn separation structure comprises at least one plywood plate and the yarn separation plate according to any one of claims 1 to 4, wherein the yarn separation plate and the plywood plate are arranged in sequence along the extension direction of the yarn separation structure, and the yarn separation plate and the plywood plate are parallel to each other; A yarn threading channel is provided in the middle of the plywood, the yarn threading channel is in the shape of an elongated strip and is parallel to the yarn separation channel. The number of yarn threading channels in the plywood is less than the number of yarn separation channels in the yarn separation plate. When the yarn separation structure includes a plurality of plywoods, the yarn threading channels on each plywood are reduced in sequence along the extension direction of the yarn separation structure. The yarn separation structure also includes a connecting portion, and the yarn separation plate and the layer combination plate are both installed on the connecting portion.
6. The yarn separation structure according to claim 5, characterized in that: The yarn separation plate is provided with four yarn separation channels; The yarn separation structure includes a first plywood plate and a second plywood plate. Along the extension direction of the yarn separation structure, the yarn separation plate, the first plywood plate and the second plywood plate are arranged in sequence. The first plywood plate has two yarn threading channels, and the second plywood has one yarn threading channel.
7. The yarn separation structure according to claim 5, characterized in that: In at least one of the plywood plates, one end of the yarn threading channel facing the yarn separating plate is in a gradually narrowing trumpet shape along the extension direction of the yarn separating structure.
8. The yarn separation structure according to claim 5, characterized in that: The connecting part comprises two connecting plates arranged opposite to each other, the yarn separation plate is connected to the ends of the connecting plates, and the ply-laying plate is installed between the two connecting plates; Along the extension direction of the yarn separation structure, a plurality of first hole positions are provided on the connection plate, and the installation position of the laminated plate can be changed by connecting with different first hole positions.
9. The yarn separation structure according to claim 8, characterized in that: The yarn separation structure also includes a fixing rod corresponding to the plywood one by one, the fixing rod is connected to the lower end of the plywood, and the two ends of the fixing rod are respectively fixed to the two connecting plates.
10. A preforming device, characterized in that: The preforming device comprises a dipping tank and a pultrusion die, and a yarn separation structure as described in any one of claims 5 to 9; Along the extension direction of the yarn separation structure, the glue dipping tank, the yarn separation structure and the pultrusion die are connected in sequence; Among them, the pultrusion die and the connecting part of the yarn separation structure are connected through a connecting block and a plurality of second fasteners, and through grooves are respectively provided at both ends of the connecting block. The second fasteners pass through the through grooves and are connected to the pultrusion die or the connecting part, and the through grooves are straight groove structures.