High-efficiency yarn guiding frame and yarn guiding method for pultrusion process

Abstract

The present invention relates to the field of pultrusion molding technology, and in particular relates to a high-efficiency yarn guiding frame and yarn guiding method for a pultrusion process. The high-efficiency yarn guiding frame for the pultrusion process comprises a yarn guiding frame, mounting rails being spaced apart along a width direction of the yarn guiding frame, and each group of mounting rails comprising two parallel single rails; each group of mounting rails is provided with a yarn guiding plate group through which it penetrates, the yarn guiding plate group comprising yarn guiding plates arranged in sequence on the two single rails penetrating therethrough, at least one row of yarn threading holes being disposed on a first yarn guiding plate, the number of rows of yarn threading holes on the remaining yarn guiding plates increasing successively by one row, and the corresponding yarn threading holes of two adjacent yarn guiding plates being coaxially arranged. The present invention, by means of redesigning the structure of a yarn guiding frame for a pultrusion process and yarn guiding holes thereof, realizes a full pallet of yarn being placed on the frame, and the yarn being merged and drawn out by the yarn separating plates, which greatly improves the efficiency of yarn placement and traction during the pultrusion process, reduces fiber waste and labor costs caused by frequent yarn changes, and can effectively improve product quality stability.

Description

A high-efficiency yarn guide frame and yarn guiding method for pultrusion process Technical Field

[0001] The invention relates to the technical field of pultrusion, and in particular to a high-efficiency yarn guide frame and yarn guiding method for a pultrusion process. Background Art

[0002] With the vigorous development of the wind power industry, there are higher requirements for promoting automated production in the composite materials industry. Therefore, exploring molding processes with high molding quality, high production efficiency, high automation and low cost has become an important research direction for the composite materials industry. The pultrusion process is a process method in which continuous fibers or fiber fabrics are fully impregnated with resin, and then heated and cured in a molding mold under the traction of a traction device to produce a composite material profile. Compared with other composite material production processes, the pultrusion process has the advantages of high raw material utilization, high production efficiency, high product dimensional accuracy and good product surface quality. The main steps of the pultrusion process include yarn guiding, dipping, preforming, curing molding, traction and cutting. The commonly used dipping method is to immerse the pulled continuous fibers into a glue tank filled with glue for impregnation. After the fibers are impregnated with glue, they are pulled through a preforming tooling under the traction of a traction device, where excess glue is squeezed out to form a preliminary product prototype. Finally, they enter the heated mold cavity for curing and molding.

[0003] At present, the pultrusion process generally adopts layered yarn racks, which require manual work on the yarn rack and yarn threading, and this process requires a lot of manpower. At the same time, yarn threading requires high professional skills of personnel, and there must be no mistakes in yarn threading, otherwise fiber knotting and fiber congestion will occur during the continuous production process. In addition, due to the influence of the supplier's yarn winding length, the fiber usage time each time is short, and the yarn ball needs to be replaced in time after use to avoid the impact of fiber running out on product performance.

[0004] Therefore, in view of the above problems, the present invention is in urgent need of providing a high-efficiency yarn guide frame and yarn guiding method for pultrusion process.

[0005] Summary of the Invention

[0006] The purpose of the present invention is to provide a high-efficiency yarn guide frame and yarn guiding method for pultrusion process, and to solve the product quality problems caused by fiber leakage, joints or yarn knots in the prior art through the design of a movable yarn guide plate.

[0007] The present invention provides a high-efficiency yarn guide frame for pultrusion process, including a yarn guide frame, on which at least two groups of parallel-arranged mounting rails are arranged at intervals along the width direction, and each group of mounting rails includes two parallel-arranged monorails; each group of mounting rails is equipped with a yarn guide plate group, and each yarn guide plate group includes a plurality of yarn guide plates sequentially mounted on the two monorails, the first yarn guide plate is equipped with at least one row of yarn threading holes, and the number of rows of yarn threading holes of the remaining yarn guide plates is increased sequentially according to the difference of one row, and the corresponding yarn threading holes of the two adjacent yarn guide plates are coaxially arranged.

[0008] Preferably, each of the yarn guide plates is further provided with a fixing protrusion and a fixing groove for fixing to an adjacent yarn guide plate.

[0009] Preferably, each row of the yarn guide plates is provided with 35 yarn threading holes, and the diameter of each yarn threading hole is 10 mm.

[0010] Preferably, the height of the yarn guide frame from the ground is 1.8 m.

[0011] Preferably, the yarn guide frame and the mounting rail are both made of steel square tubes.

[0012] Preferably, each yarn guide plate is made of polytetrafluoroethylene plate, wherein the periphery of each yarn threading hole is polished.

[0013] Preferably, each of the yarn guide plates is further provided with a square hole matching each monorail.

[0014] Preferably, the horizontal spacing between the yarn holes is 22 mm.

[0015] The present invention also provides a yarn guiding method for pultrusion process, comprising the following steps:

[0016] 1) Using the high-efficiency pultrusion process as described above to guide the yarn with a yarn guide;

[0017] 2) placing multiple fiber groups at intervals along the length of the yarn guide frame;

[0018] 3) threading the yarn ends of each fiber group of the first fiber group into the yarn threading holes of the first row of the yarn guide plate group;

[0019] 4) Fix the first row of yarn guide plates of the yarn guide plate group, move the remaining yarn guide plates backward to above the adjacent second fiber group, and thread the yarn ends of each fiber group of the second fiber group into the corresponding yarn threading holes of the second row of the remaining yarn guide plates;

[0020] 5) Repeat step 4 to complete the threading of the yarn of each fiber group.

[0021] Preferably, the distance between two adjacent bobbin trays is 60 cm.

[0022] The present invention provides a high-efficiency yarn guide frame and yarn guiding method for pultrusion process, which have the following improvements compared with the prior art:

[0023] 1. The present invention provides a high-efficiency yarn guide frame for pultrusion process. The yarn frame and yarn guide plate areas of the traditional pultrusion yarn guide frame are redesigned to achieve improvements such as yarn whole-tray loading and yarn guide plate combined yarn feeding. The use of the whole-tray connection yarn loading achieves high efficiency of fiber loading and low frequency of fiber replacement, which can realize fast and accurate yarn threading. Depending on the yarn support design, the service life can be increased by 3-5 times.

[0024] 2. The use of a movable yarn dividing plate can effectively reduce the time cost of yarn pulling by personnel, and at the same time avoid the cross-knotting of fibers caused by the operating level of employees. It can also reduce the possibility of fiber running out and avoid frequent fiber joints caused by high yarn changing frequency. It effectively solves the product quality problems caused by fiber running out, joints or yarn knots, improves product stability, lowers the threshold for operators, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0026] FIG1 is a schematic structural diagram (stereoscopic view) of a yarn guide frame for a high-efficiency pultrusion process according to the present invention;

[0027] FIG2 is a schematic diagram (stereoscopic view) of the yarn guide plate assembly of the present invention;

[0028] FIG3 is a schematic diagram of steps 3, 4, and 5 in the yarn guiding method for pultrusion process described in the present invention.

[0029] Explanation of the accompanying drawings: 1. Yarn guide frame; 2. Monorail; 3. Yarn guide plate group; 301. First yarn guide plate; 302. Second yarn guide plate; 303. Third yarn guide plate; 304. Fourth yarn guide plate; 305. Fifth yarn guide plate; 306. Sixth yarn guide plate; 307. Seventh yarn guide plate; 4. Yarn threading hole; 5. Fiber ball; 6. Yarn bobbin tray; 7. Square hole. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be described clearly and completely below. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0033] As shown in Figure 1, this embodiment provides a high-efficiency yarn guide frame for pultrusion process, including a yarn guide frame 1, which is fixed on the upper part of the factory building. At least two groups of parallel mounting rails are arranged at intervals along the width direction on the yarn guide frame 1, and each group of mounting rails includes two parallel monorails 2; each group of mounting rails is equipped with a yarn guide plate group 3, and each yarn guide plate group 3 includes a plurality of yarn guide plates sequentially mounted on the two monorails 2, and the first yarn guide plate is provided with at least one row of yarn threading holes 4, and the number of rows of yarn threading holes 4 of the remaining yarn guide plates is increased in sequence according to the difference of one row, and the corresponding yarn threading holes 4 of the two adjacent yarn guide plates are coaxially arranged.

[0034] The present invention provides a high-efficiency yarn guide frame for pultrusion process, which redesigns the yarn frame and yarn guide plate areas of the traditional pultrusion process yarn guide frame, and realizes improvements such as whole-holder yarn loading and yarn guide plate combined yarn drawing; the whole-holder is used to connect the yarn, so as to achieve high efficiency of fiber loading and low frequency of fiber replacement, which can realize fast and accurate fiber threading, and the service life can be increased to 3-5 times according to the yarn support design; at the same time, the use of movable yarn dividing plates can effectively reduce the time cost of personnel pulling yarn, and at the same time can avoid the cross-knotting of fiber pulling caused by the operating level of employees, and at the same time can reduce the possibility of fiber running empty and avoid frequent fiber joints caused by high yarn changing frequency; it effectively solves the product quality problems caused by fiber running empty, joints or yarn knots, improves product stability, lowers the threshold for operators, and improves work efficiency.

[0035] In this embodiment, each yarn guide plate is further provided with a fixing protrusion and a fixing groove for fixing with an adjacent yarn guide plate.

[0036] As shown in FIG2 , each row of the yarn guide plates is provided with 35 yarn threading holes 4 , and the diameter of each yarn threading hole 4 is 10 mm.

[0037] In this embodiment, the diameter of the fibers drawn out from the fiber cluster 5 is 1 mm.

[0038] In this embodiment, the height of the yarn guide frame 1 from the ground is 1.8 m.

[0039] In this embodiment, the yarn guide frame 1 and the mounting guide rail are both made of steel square tubes.

[0040] In this embodiment, the material of each yarn guide plate is polytetrafluoroethylene plate, wherein the periphery of each yarn threading hole 4 is polished.

[0041] In this embodiment, a polytetrafluoroethylene plate is used and the punched areas are polished to achieve lubrication and avoid damage to the fibers.

[0042] As shown in FIG2 , each yarn guide plate is further provided with a square hole 7 matching each monorail 2 .

[0043] In this embodiment, the horizontal spacing between the yarn threading holes 4 is 22 mm.

[0044] As shown in Figures 1, 2, and 3, the present invention also provides a yarn guiding method for a pultrusion process, comprising the following steps:

[0045] 1) Using the high-efficiency pultrusion process as described above to guide the yarn with a yarn guide;

[0046] 2) placing a plurality of fiber clusters 5 in sequence and at intervals along the length of the yarn guide frame 1;

[0047] 3) The yarn ends of each fiber group 5 of the first fiber group 5 are threaded into the yarn threading holes 4 of the first row of the yarn guide plate group 3;

[0048] 4) Fix the first row of yarn guide plates of the yarn guide plate group 3, move the remaining yarn guide plates backward to above the adjacent second fiber group 5, and thread the yarn ends of each fiber group 5 of the second fiber group 5 into the corresponding yarn threading holes 4 of the second row of the remaining yarn guide plates;

[0049] 5) Repeat step 4 to complete the threading of 5 groups of yarns in each fiber group.

[0050] The present invention provides a yarn guiding method for a pultrusion process, which adopts a whole support to connect the yarn, realizes high efficiency of fiber racking and low frequency of fiber replacement, can realize fast and accurate threading of fibers, and can increase the service life to 3-5 times according to the design of the yarn support; at the same time, the use of a movable yarn dividing plate can effectively reduce the time cost of yarn pulling by personnel, and can avoid the cross-knotting of fiber pulling caused by the operation level of employees, and can reduce the possibility of fiber running out and avoid frequent fiber joints caused by high yarn changing frequency; it effectively solves the product quality problems caused by fiber running out, joints or yarn knots, improves product stability, lowers the threshold for operators, and improves work efficiency.

[0051] In this embodiment, the distance between the two bobbin trays 6 is 60 cm.

[0052] As shown in Figures 1, 2, and 3, the present invention also provides an embodiment, including a yarn guide frame 1, a monorail 2, a yarn guide plate group 3, a yarn threading hole 4, a fiber group 5, and a yarn bobbin tray 6, wherein the yarn guide plate group 3 includes a first yarn guide plate 301, a second yarn guide plate 302, a third yarn guide plate 303, a fourth yarn guide plate 304, a fifth yarn guide plate 305, a sixth yarn guide plate 306, and a seventh yarn guide plate 307;

[0053] In this embodiment, the yarn guiding method for pultrusion process includes the following steps:

[0054] 1) Prepare a high-efficiency yarn guide frame for pultrusion process;

[0055] 2) placing at least seven groups of yarn bobbin trays 6 with fiber balls 5 at intervals below the yarn guide frame; drawing fibers from each fiber ball 5, and sliding each yarn guide plate along each monorail 2 until each of the fixed protrusions and each fixed groove engages;

[0056] 3) After the fibers from the first bobbin tray pass through the yarn threading hole 4 and sequentially pass through the first yarn guide plate 301, the second yarn guide plate 302, the third yarn guide plate 303, the fourth yarn guide plate 304, the fifth yarn guide plate 305, the sixth yarn guide plate 306 and the seventh yarn guide plate 307, the first yarn guide plate 301 is separated from the other yarn guide plates and slid above the first bobbin tray; after the fibers from the second bobbin tray pass through the yarn threading hole 4 and sequentially pass through the second yarn guide plate 302, the third yarn guide plate 303, the fourth yarn guide plate 304, the fifth yarn guide plate 305, the sixth yarn guide plate 306 and the seventh yarn guide plate 307, the second yarn guide plate 302 is separated from the other yarn guide plates and slid above the second bobbin tray; after the fibers from the third bobbin tray pass through the third yarn guide plate 303, the fourth yarn guide plate 304, the fifth yarn guide plate 305, the sixth yarn guide plate 306 and the seventh yarn guide plate 307, the third yarn guide plate 303 is separated from the other yarn guide plates and slides to above the third bobbin tray; after the fibers from the fourth bobbin tray pass through the fourth guide plate 304, the fifth guide plate 305, the sixth guide plate 306 and the seventh guide plate 307 in sequence, the fourth guide plate 304 is separated from the other yarn guide plates and slides to above the fourth bobbin tray; after the fibers from the fifth bobbin tray pass through the fifth guide plate 305, the sixth guide plate 306 and the seventh guide plate 307 in sequence, the fifth guide plate 305 is separated from the other yarn guide plates and slides to above the fifth bobbin tray; after the fibers from the sixth bobbin tray pass through the sixth guide plate 306 and the seventh guide plate 307 in sequence, the sixth guide plate 306 is separated from the seventh guide plate 307 and slides to above the sixth bobbin tray; the fibers from the seventh bobbin tray pass through the seventh guide plate 307 and the seventh guide plate 307 is slid to above the seventh bobbin tray;

[0057] 4) Each fiber passing through the seventh yarn guide plate 307 is pulled out of the yarn guide frame and introduced into the glue tank to complete the yarn guiding operation of the pultrusion process.

[0058] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A yarn guiding frame for a high-efficiency pultrusion process, characterized in that: The invention comprises a yarn guide frame (1), on which at least two groups of parallelly arranged mounting rails are arranged at intervals in the width direction, each group of mounting rails comprising two parallelly arranged monorails (2); each group of mounting rails is provided with a yarn guide plate group (3), each yarn guide plate group (3) comprising a plurality of yarn guide plates sequentially mounted on the two monorails (2), the first yarn guide plate being provided with at least one row of yarn threading holes (4), the number of rows of yarn threading holes (4) of the remaining yarn guide plates being increased in sequence according to the difference of one row, and the corresponding yarn threading holes (4) of two adjacent yarn guide plates being coaxially arranged.

2. The yarn guide frame for the high-efficiency pultrusion process according to claim 1, characterized in that: Each of the yarn guide plates is also provided with a fixing protrusion and a fixing groove for fixing with an adjacent yarn guide plate.

3. The yarn guiding frame for the high-efficiency pultrusion process according to claim 1, characterized in that: Each row of the yarn guide plates is provided with 35 yarn threading holes (4), and the diameter of each yarn threading hole (4) is 10 mm.

4. The yarn guiding frame for the high-efficiency pultrusion process according to claim 3, characterized in that: The height of the yarn guide frame (1) from the ground is 1.8m.

5. The yarn guide frame for the high-efficiency pultrusion process according to claim 4, characterized in that: The yarn guide frame (1) and the mounting guide rail are both made of steel square tubes.

6. The yarn guide for the high-efficiency pultrusion process according to claim 5, characterized in that: The material of each yarn guide plate is a polytetrafluoroethylene plate, wherein the periphery of each yarn threading hole (4) is polished.

7. The yarn guide frame for the high-efficiency pultrusion process according to claim 6, characterized in that: Each of the yarn guide plates is also provided with a square hole (7) matching each monorail (2).

8. The yarn guiding frame for the high-efficiency pultrusion process according to claim 7, characterized in that: The horizontal spacing between the yarn threading holes (4) is 22 mm.

9. A yarn guiding method for pultrusion process, characterized in that: The steps include: 1) Using a yarn guide frame for guiding the yarn using a high-efficiency pultrusion process as described in any one of claims 1 to 8; 2) placing a plurality of fiber clusters (5) in sequence and at intervals along the length of the yarn guide frame (1); 3) threading the yarn ends of each fiber group (5) of the first fiber group (5) into the yarn threading holes (4) of the first row of the yarn guide plate group (3) accordingly; 4) fixing the first row of yarn guide plates of the yarn guide plate group (3), moving the remaining yarn guide plates backward to above the adjacent second fiber group (5), and threading the yarn ends of each fiber group (5) of the second fiber group (5) into the yarn threading holes (4) of the second row of the remaining yarn guide plates; 5) Repeat step 4 to complete the threading of the yarns of each fiber group (5).

10. The yarn guiding method for pultrusion process according to claim 9, wherein: The distance between two adjacent yarn tube trays (6) is 60 cm.

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