Yarn guide device for pultrusion process

Abstract

The utility model provides a yarn guide device for pultrusion process, which comprises a plurality of layers of creels, the top of each layer of creel is detachably provided with a plurality of yarn guide plates along the X-axis direction, the yarn guide plates are provided with yarn threading holes side by side along the Y-axis direction, and the yarn threading holes are arranged in the X-axis direction. Yarn threading holes are formed in the yarn guide plates, the yarn threading holes in the yarn guide plates are sequentially increased progressively according to the number difference value of the yarn threading holes in the two adjacent yarn guide plates, the yarn guide device further comprises a fixing assembly used for assembling all the yarn guide plates into a whole in an attached mode, and when the yarn guide plates are assembled into the whole in an attached mode, the corresponding yarn threading holes in the yarn guide plates are coaxially formed and coincide. During yarn threading, the yarn guide plates are taken down and are tightly fixed together through the fixing assemblies, so that the corresponding yarn threading holes in all the yarn guide plates coincide, yarn bundles of yarn bundle rolls can conveniently penetrate through the corresponding yarn threading holes in the yarn guide plates at a time, rapid and accurate yarn threading of the yarn bundles can be achieved, a large amount of manpower is saved, yarn bundle crossing and fiber scratching and fuzzing during yarn threading are avoided, and the yarn threading efficiency is improved. And even the fiber is snapped.

Description

Technical Field

[0001] The utility model relates to the technical field of pultrusion molding, in particular to a yarn guiding device for pultrusion process. Background Technique

[0002] Composite materials have the advantages of light weight, high strength, corrosion resistance and good fatigue resistance. Replacing metals with them can significantly reduce the weight of parts and improve the fatigue resistance and corrosion resistance of parts.

[0003] In the pultrusion molding process, a certain number of fibers are guided by a yarn guiding device, enter a resin tank to be infiltrated with resin, and then enter a mold. The pultruded profile is continuously produced through the shaping and heating of the mold cavity. Pultrusion molding has the advantages of high production efficiency, high material utilization rate, high glass fiber content, high unidirectional strength, etc., and is a very important composite material molding technology. The pultrusion molding process includes fiber yarn bundle guiding, glue injection and impregnation, preforming, curing and forming, traction and cutting. Among them, the fiber yarn bundle guiding is all manually operated. When it is necessary to add a yarn bundle roll or when the yarn bundle on the yarn rack is used up, re-guiding of the yarn is required. In the prior art, the threading process usually needs to be carried out through a yarn rack. The traditional threading plate is fixedly installed on the yarn rack. A large amount of manpower is required for manual threading of the yarn. The more yarn bundles the product uses, the greater the workload. Moreover, the yarn threading work is cumbersome and no mistakes can occur, otherwise the yarn bundles will cross, the fibers will be scratched and fuzzed during pulling, and even the fibers will be broken, ultimately affecting the performance of the pultruded composite material product. Content of the Utility Model

[0004] Aiming at the deficiencies of the prior art, the purpose of the utility model is to provide a yarn guiding device for pultrusion process, which solves the problems that the threading plate in the prior art is fixedly installed on the yarn rack, a large amount of manpower is required for manual threading of the yarn, and it is easy to have yarn bundle crossing, the fibers are scratched and fuzzed during pulling, and even the fibers are broken, affecting the performance of the pultruded composite material product.

[0005] In order to achieve the above purpose, the utility model provides the following technical solution: A yarn guiding device for pultrusion process, including a yarn rack for placing yarn bundle rolls, the yarn rack is provided with multiple layers, and a plurality of yarn guiding plates for guiding the yarn bundle rolls are detachably installed along the X-axis direction on the top of each layer of the yarn rack. The yarn guiding plates are provided with at least two threading holes along the Y-axis direction. In the X-axis direction, the threading holes on each yarn guiding plate are sequentially increased according to the difference in the number of threading holes on the two adjacent front yarn guiding plates. The yarn guiding device further includes a fixing component for fitting and assembling all the yarn guiding plates into an integral body. When the yarn guiding plates are fitted and assembled into an integral body, the corresponding threading holes on the yarn guiding plates are coaxially arranged and coincide.

[0006] As a further improvement of the above technical solution:

[0007] A mounting plate is fixedly arranged at the top of the yarn creel, and the yarn guide plate is detachably mounted on the mounting plate by bolts.

[0008] The yarn guide plate is a rectangular structure with equal size. In the X-axis direction, hollow parts are provided at positions corresponding to the yarn-passing holes added to all the subsequent yarn guide plates on the previous yarn guide plate.

[0009] The yarn guide plate includes a first assembly part and a second assembly part. The first assembly part and the second assembly part are detachably inserted. When the first assembly part and the second assembly part are spliced, the hollow part is formed. The yarn-passing holes are provided in the first assembly part, and the first assembly part is detachably mounted on the mounting plate by bolts.

[0010] Installation grooves are provided at both ends of the second assembly part. Corresponding to the installation grooves, pins are provided at both ends of the first assembly part. A boss structure matching the installation groove is integrally formed at the end of the pin, and the first assembly part is inserted into the second assembly part.

[0011] The fixing component includes a screw rod and a nut. Mounting holes are correspondingly provided at the diagonals of the yarn guide plate. The screw rod passes through the mounting holes, and the nuts are threadedly mounted at both ends of the screw rod. The yarn guide plates are assembled into a whole by being fitted with the screw rod and the nut.

[0012] A positioning structure for positioning the corresponding yarn-passing holes is installed between two adjacent yarn guide plates. The positioning structure includes a positioning pin and a positioning hole. The positioning pin and the positioning hole are staggeredly arranged at the corresponding positions of two adjacent yarn guide plates. The positioning pin and the positioning hole are of the same size, and the length of the positioning pin is not greater than the thickness of the yarn guide plate.

[0013] Numbers are sequentially arranged on the side surface of the yarn guide plate and on the mounting plate in the order of increasing or decreasing number of yarn-passing holes.

[0014] The yarn guide plate is made of wear-resistant material, and the periphery of the yarn-passing hole is rounded and polished.

[0015] Compared with the prior art, the above technical solution brings the following technical effects:

[0016] The yarn guide plate of the present utility model is detachably installed on the top of the yarn rack. When threading the yarn, all the yarn guide plates are removed and tightly fixed together through the fixing component, so that the corresponding yarn threading holes on all the yarn guide plates coincide, facilitating the yarn in the yarn bundle to pass through the corresponding yarn threading holes on the yarn guide plates at one time. Compared with the traditional way of fixedly installing the yarn guide plates on the top of the yarn rack with a certain interval between adjacent yarn guide plates and the yarn bundle passing through the corresponding yarn threading holes on all the yarn guide plates one by one, this yarn guiding device can realize fast and accurate yarn threading, saving a large amount of manpower, avoiding the situation of yarn bundle crossing during yarn threading, fiber scratching and fuzzing when pulling, and even fiber breakage, and ensuring the performance of the pultruded composite material product. Brief Description of the Drawings

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and thus should not be regarded as limiting the scope. For those of ordinary skill in the art, other related drawings can be obtained based on these drawings without creative efforts.

[0018] Figure 1 is the schematic diagram of the overall structure of the present utility model;

[0019] Figure 2 is the schematic diagram of the structure of one of the yarn guide plates of the present utility model;

[0020] Figure 3 is the schematic diagram of the structure of the first assembly part of one of the yarn guide plates of the present utility model;

[0021] Figure 4 is the schematic diagram of the structure of the second assembly part of one of the yarn guide plates of the present utility model;

[0022] Figure 5 is the schematic diagram of the structure after all the yarn guide plates of the present utility model are fitted and assembled;

[0023] Main Element Symbol Description:

[0024] 1. Yarn bundle roll; 2. Yarn rack; 3. Yarn guide plate; 31. First assembly part; 311. Plug pin; 312. Boss structure; 32. Second assembly part; 321. Installation groove; 4. Yarn threading hole; 5. Fixing component; 51. Screw; 52. Nut; 6. Installation plate; 7. Hollow part; 8. Installation hole; 9. Positioning structure; 91. Positioning pin; 92. Positioning hole. Detailed Embodiment

[0025] Embodiments of the present utility model will be described in detail below. Examples of the embodiments are shown in the accompanying drawings, where the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below by referring to the accompanying drawings are exemplary and are only used to explain the present utility model and should not be construed as limiting the present utility model.

[0026] In the description of the present utility model, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as limiting the present utility model.

[0027] In addition, the terms "first" and "second" are only used for descriptive purposes and should not be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include one or more of such features. In the description of the present utility model, "a plurality" means two or more unless otherwise specifically defined.

[0028] In the present utility model, unless otherwise clearly specified and defined, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the internal communication of two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0029] In the present utility model, unless otherwise clearly specified and defined, the first feature being "on" or "under" the second feature may be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over" and "on" the second feature may be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "under", "below" and "beneath" the second feature may be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0030] such asFigures 1 to 5 As shown in the figure, the yarn guiding device for the pultrusion process of this embodiment includes a yarn rack 2 for placing the yarn beam roll 1. The yarn rack 2 is provided with multiple layers (the number of layers is set according to actual needs). Along the X-axis direction, a number of yarn guiding plates 3 for guiding the yarn beam roll 1 are detachably installed on the top of each layer of the yarn rack 2. Along the Y-axis direction, not less than two yarn passing holes 4 are formed on the yarn guiding plate 3. In the X-axis direction, the yarn passing holes 4 on each yarn guiding plate 3 are sequentially increased according to the difference in the number of yarn passing holes 4 on the two adjacent front yarn guiding plates 3. The yarn guiding device further includes a fixing component 5 for fitting and assembling all the yarn guiding plates 3 into an integral body. When the yarn guiding plates 3 are fitted and assembled into an integral body, the corresponding yarn passing holes 4 on the yarn guiding plates 3 are coaxially arranged and coincide with each other.

[0031] As Figure 1 shown in the figure, the X-axis direction and the Y-axis direction are perpendicular to each other. The left wall of the yarn rack 2 is regarded as the origin of the X-axis. In the X-axis direction, the front is the left in the figure, and the back is the right in the figure. Starting from the front to the back, the yarn guiding plate 3 located at the frontmost side is regarded as the first yarn guiding plate 3, and then followed by the second yarn guiding plate 3, the third yarn guiding plate 3... The number of rows of the yarn beam roll 1 also starts from the front to the back. The yarn beam roll 1 at the frontmost side is the first row of yarn beam roll 1, followed by the second row, the third row... The column refers to the Y-axis direction. As Figure 1As shown, two columns of yarn beam rolls 1 are placed on each yarn rack 2. The number of threading holes 4 on the first yarn guiding plate 3 is the same as the number of the first row of yarn beam rolls 1. The number of threading holes 4 on the first yarn guiding plate 3 is two, the number of threading holes 4 on the second yarn guiding plate 3 is four, and the number of threading holes 4 on the third yarn guiding plate 3 is six... Of course, in other embodiments, the number of yarn beam rolls 1 in each row can also be other values. The length and width of each yarn rack 2 are made according to the number of yarn beam rolls 1. For the same number of yarn beam rolls 1, the yarn rack 2 can be made into one layer or several layers. In this embodiment, the yarn rack 2 is designed with three layers. The yarn guiding plates 3 are arranged at intervals along the X-axis direction on the top of the three-layer yarn rack 2. The yarn guiding plates 3 are detachably installed on the yarn rack 2. When threading the yarn, all the yarn guiding plates 3 are removed and tightly fixed together through the fixing component 5, so that the corresponding threading holes 4 on all the yarn guiding plates 3 coincide, realizing that the yarn bundles of the yarn beam rolls 1 are combined and passed through the corresponding threading holes 4 on the yarn guiding plates 3 at one time, and then each yarn guiding plate 3 is respectively fixed to the yarn rack 2. The traditional yarn guiding device directly fixes the yarn guiding plate 3 on the yarn rack 2 along the length direction of the yarn rack 2. When threading the yarn, the worker passes each yarn bundle through the threading holes 4 of each yarn guiding plate 3 in turn. Due to the arrangement of the yarn beam rolls 1, there is a certain distance between two yarn guiding plates 3. When threading the yarn, it is difficult to align the coaxial threading holes 4 on two adjacent yarn guiding plates 3, and there are often problems such as the yarn bundle passing through the wrong hole, resulting in the yarn bundle knotting and being unable to be pulled. This yarn guiding device can realize fast and accurate yarn threading, saving a large amount of manpower, improving the efficiency of yarn threading, and at the same time avoiding the situation of yarn bundle crossing, fiber scratching and fuzzing, and even fiber breakage when pulling, ensuring the performance of the pultruded composite material products.

[0032] In one specific embodiment, a mounting plate 6 is fixedly arranged on the top of the yarn rack 2, and the yarn guiding plate 3 is detachably installed on the mounting plate 6 through bolts.

[0033] In one specific embodiment, the yarn guiding plate 3 is a rectangular structure with equal size. In the X-axis direction, hollow parts 7 are arranged at the positions corresponding to the threading holes 4 added on all the subsequent yarn guiding plates 3 on the previous yarn guiding plate 3.

[0034] Specifically, since the number of the subsequent threading holes 4 increases successively compared with the number of the previous threading holes 4, in order not to interfere with the yarn bundle passing through the threading holes 4 on the subsequent yarn guiding plates 3, hollow parts 7 are arranged at the positions corresponding to the threading holes 4 added on all the subsequent yarn guiding plates 3 on the previous yarn guiding plate 3.

[0035] In one specific embodiment, the yarn guiding plate 3 includes a first assembling part 31 and a second assembling part 32. The first assembling part 31 and the second assembling part 32 are detachably inserted. When the first assembling part 31 and the second assembling part 32 are spliced, a hollow part 7 is formed. The threading holes 4 are arranged on the first assembling part 31, and the first assembling part 31 is detachably installed on the mounting plate 6 through bolts.

[0036] Specifically, in the X-axis direction, the last yarn guide plate 3 can be an integral structure or a structure spliced by upper and lower two parts. The remaining yarn guide plates 3 all include a first assembly part 31 and a second assembly part 32. The first assembly part 31 is a square structure, and the second assembly part 32 is a U-shaped frame structure.

[0037] In one specific embodiment, installation grooves 321 are opened at both ends of the second assembly part 32. Plug pins 311 are arranged at the corresponding positions of both ends of the first assembly part 31. A boss structure 312 matching the installation groove 321 is integrally formed at the end of the plug pin 311. The first assembly part 31 is inserted into the second assembly part 32.

[0038] Specifically, the diameter of one end of the boss structure 312 far from the plug pin 311 is smaller than the diameter of the end close to the plug pin 311. The preferred diameter difference is 0.5 - 1 mm. The total length of the plug pin 311 and the boss structure 312 is smaller than the depth of the installation groove 321. The preferred value is 1 - 2 mm. The boss structure 312 and the installation groove 321 are in interference fit. The difference between the maximum outer diameter of the boss structure 312 and the inner diameter of the installation groove 321 is preferably 0.5 - 1 mm.

[0039] In one specific embodiment, the fixing assembly 5 includes a screw 51 and a nut 52. Installation holes 8 are correspondingly opened at the diagonals of the yarn guide plate 3. The screw 51 passes through the installation holes 8, and the nut 52 is threadedly installed at both ends of the screw 51. The yarn guide plates 3 are assembled into a whole by fitting with the screw 51 and the nut 52.

[0040] In one specific embodiment, a positioning structure 9 for positioning the corresponding yarn passing holes 4 is installed between two adjacent yarn guide plates 3. The positioning structure 9 includes a positioning pin 91 and a positioning hole 92. The positioning pin 91 and the positioning hole 92 are staggeredly arranged at the corresponding positions of two adjacent yarn guide plates 3. The sizes of the positioning pin 91 and the positioning hole 92 are matched. The length of the positioning pin 91 is not greater than the thickness of the yarn guide plate 3.

[0041] Specifically, the positioning pin 91 and the positioning hole 92 are arranged on the second assembly part 32. Among two adjacent yarn guide plates 3, a positioning pin 91 is installed and a positioning hole 92 is opened on one of the second assembly parts 32. A positioning hole 92 is opened at the position corresponding to the positioning pin 91 on the other second assembly part 32, and a positioning pin 91 is arranged at the position corresponding to the positioning hole 92. The sizes of the positioning pin 91 and the positioning hole 92 are matched. The length of the positioning pin 91 is not greater than the thickness of the yarn guide plate 3. When two adjacent yarn guide plates 3 are pressed close, the positioning pin 91 will not interfere with them. When the positioning pin 91 is inserted into the positioning hole 92, the corresponding yarn passing holes 4 on the yarn guide plates 3 are coaxial.

[0042] In one specific embodiment, numbers are sequentially arranged on the side surface of the yarn guide plate 3 and the mounting plate 6 in ascending or descending order according to the number of the yarn passing holes 4, so as to facilitate quick assembly.

[0043] In one specific embodiment, the yarn guide plate 3 is made of wear-resistant material, and the periphery of the yarn-passing hole 4 is rounded and polished.

[0044] The yarn-passing method of this yarn guiding device is as follows:

[0045] (a) Place the yarn bobbins 1 at intervals along the X-axis direction on the yarn rack 2 in turn;

[0046] (b) Assemble the first assembly part 31 and the second assembly part 32 of the yarn guide plate 3, and then arrange all the yarn guide plates 3 in ascending order according to the number of yarn-passing holes 4 on the yarn guide plate 3. The screw 51 passes through the mounting hole 8, and adjacent two yarn guide plates 3 are positioned by the positioning pins 91 and the positioning holes 92, so that the corresponding yarn-passing holes 4 on adjacent two yarn guide plates 3 are coaxially arranged and coincide;

[0047] (c) Screw the nuts 52 onto both ends of each screw 51 and tighten until the yarn guide plate 3 is completely pressed tightly, so that there is no gap between adjacent yarn guide plates 3;

[0048] (d) Pull out the yarns in the yarn bobbins 1 on the yarn rack 2 in turn, and along the X-axis direction, thread the yarns from the front end to the rear end of the yarn rack 2 in turn, so that the yarns of each yarn bobbin 1 pass through the corresponding yarn-passing holes 4;

[0049] (e) After the yarn threading is completed, unscrew the nuts 52 from one end of the screw 51, separate the yarn guide plates 3, then remove the second assembly part 32 of the yarn guide plate 3, and sequentially remove the first assembly part 31 of the yarn guide plate 3 from the screw 51 and fix it on the corresponding mounting plate 6.

[0050] Among them, in step (a), all the yarn bobbins 1 are located at the front lower side position of the corresponding yarn guide plate 3.

[0051] Among them, in step (b), the side of the yarn guide plate 3 is numbered according to the number of yarn-passing holes 4, and the mounting plate 6 is correspondingly numbered, which is convenient for quickly installing the yarn guide plate 3 on the mounting plate 6.

[0052] Among them, in step (d), the specific yarn-passing method is that the yarns of the first row of yarn bobbins 1 pass through the corresponding yarn-passing holes 4 on all the intermediate yarn guide plates 3, the yarns of the second row of yarn bobbins 1 pass through the hollow part 7 on the first yarn guide plate 3 and the corresponding yarn-passing holes 4 on other yarn guide plates 3, the yarns of the third row of yarn bobbins 1 pass through the hollow parts 7 on the first and second yarn guide plates 3 and the corresponding yarn-passing holes 4 on other yarn guide plates 3, and so on, and operate in turn to make all the yarn bobbins 1 be threaded. When threading the yarns, the yarns of different rows of yarn bobbins 1 are threaded from the middle to the yarn-passing holes 4 on both sides.

[0053] In the description of this specification, the description with reference to terms such as "one embodiment", "some embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in connection with the embodiment or example are included in at least one embodiment or example of the present utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described can be combined in a suitable manner in any one or more embodiments or examples. In addition, without contradiction, those skilled in the art can combine and combine the different embodiments or examples described in this specification and the features of different embodiments or examples.

[0054] Although the embodiments of the present utility model have been shown and described above, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present utility model. Those of ordinary skill in the art can make changes, modifications, substitutions, and variations to the above embodiments, as long as they meet the purpose of the present utility model, and they should all be within the scope of protection required by the present utility model. For example: different combinations of specific embodiments, different combinations of different distinguishing technical features.

Claims

1. A yarn guide device for pultrusion process, characterized in that: The invention comprises a yarn rack (2) for placing a yarn bundle roll (1), wherein the yarn rack (2) is provided with multiple layers, and a plurality of yarn guide plates (3) for guiding the yarn bundle roll (1) are detachably mounted on the top of each layer of the yarn rack (2) along the X-axis direction, and the yarn guide plates (3) are provided with at least two yarn threading holes (4) along the Y-axis direction, and in the X-axis direction, the yarn threading holes (4) on each yarn guide plate (3) are increased in sequence according to the difference in the number of yarn threading holes (4) on the two preceding adjacent yarn guide plates (3), and the yarn guiding device further comprises a fixing component (5) for fitting all the yarn guide plates (3) into a whole, and when the yarn guide plates (3) are fitted into a whole, the corresponding yarn threading holes (4) on the yarn guide plates (3) are all coaxially arranged and overlap.

2. The yarn guide device for pultrusion process according to claim 1, characterized in that: A mounting plate (6) is fixedly arranged on the top of the yarn rack (2), and the yarn guide plate (3) is detachably mounted on the mounting plate (6) by means of bolts.

3. The yarn guide device for pultrusion process according to claim 2, characterized in that: The yarn guide plates (3) are rectangular structures of equal size. In the X-axis direction, hollow portions (7) are provided on the preceding yarn guide plate (3) corresponding to positions of yarn threading holes (4) added on all subsequent yarn guide plates (3).

4. The yarn guide device for pultrusion process according to claim 3, characterized in that: The yarn guide plate (3) comprises a first assembly part (31) and a second assembly part (32); the first assembly part (31) and the second assembly part (32) are detachably connected; the hollow part (7) is formed when the first assembly part (31) and the second assembly part (32) are connected; the yarn threading hole (4) is provided in the first assembly part (31); and the first assembly part (31) is detachably mounted on the mounting plate (6) by means of bolts.

5. The yarn guide device for pultrusion process according to claim 4, characterized in that: Both ends of the second assembly part (32) are provided with mounting grooves (321), and both ends of the first assembly part (31) are provided with latches (311) at positions corresponding to the mounting grooves (321), and the ends of the latches (311) are integrally formed with boss structures (312) matching the mounting grooves (321), and the first assembly part (31) is plugged into the second assembly part (32).

6. The yarn guide device for pultrusion process according to claim 1, characterized in that: The fixing assembly (5) comprises a screw rod (51) and a nut (52); the yarn guide plate (3) is provided with mounting holes (8) at the diagonals thereof; the screw rod (51) passes through the mounting holes (8); the nut (52) is threadedly mounted on both ends of the screw rod (51); and the yarn guide plate (3) is assembled into a whole by fitting the screw rod (51) and the nut (52).

7. The yarn guide device for pultrusion process according to claim 1, characterized in that: A positioning structure (9) for positioning corresponding to the yarn threading hole (4) is installed between two adjacent yarn guide plates (3). The positioning structure (9) comprises a positioning pin (91) and a positioning hole (92). The positioning pin (91) and the positioning hole (92) are staggeredly arranged at corresponding positions of the two adjacent yarn guide plates (3). The positioning pin (91) and the positioning hole (92) are matched in size. The length of the positioning pin (91) is not greater than the thickness of the yarn guide plate (3).

8. The yarn guide device for pultrusion process according to claim 2, characterized in that: The side surface of the yarn guide plate (3) and the mounting plate (6) are numbered in sequence from small to large or from large to small according to the number of the yarn threading holes (4).

9. The yarn guide device for pultrusion process according to claim 1, characterized in that: The yarn guide plate (3) is made of wear-resistant material, and the periphery of the yarn threading hole (4) is rounded and polished.

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