KR102699753B1 - Unwinding creel device - Google Patents

Abstract

The present invention relates to an unwinding creel device, wherein the unwinding creel device comprises a body including a plurality of regions and a plurality of creel groupings arranged in the plurality of regions, each of the plurality of creel groupings comprising a plurality of creases spaced apart in the transverse direction on the body and having a plurality of bobbin spools respectively mounted thereon, a plurality of pulling rolls spaced apart in the transverse direction on the body and spaced apart in the vertical direction from the plurality of creases, and an eyelet arranged on the body and including a plurality of holes through which a plurality of fibers unwound from the plurality of bobbin spools respectively pass, wherein each of the plurality of pulling rolls has a different diameter from each other.

Description

UNWINDING CREEL DEVICE

The present invention relates to an unwinding creel device, and more specifically, to an unwinding creel device in which a plurality of wound spool bobbins are each mounted for manufacturing a unidirectional tape (hereinafter, “TD tape”), which is an intermediate material of a fiber-reinforced composite material.

Fiber-reinforced composites using carbon fibers or glass fibers are materials that impregnate a matrix into the reinforcing fibers, and have excellent mechanical properties such as high strength and high elasticity. In general, fiber-reinforced composites are manufactured by impregnating resins, etc. into reinforcing fibers and using them as sheet-shaped prepregs, and in particular, a form in which the fibers are arranged in one direction is called a Unidirectional Tape (UD Tape).

In order to manufacture UD Tape, it can be divided into a creel section that releases fibers from multiple reinforcing fiber spool bobbins at a constant tension, a spreading section that widely spreads the fibers, a resin impregnation section, and a winding section that winds the manufactured UD Tape.

Here, in the case of UD tape impregnated with thermoplastic resin, fiber spreading is very important due to high resin viscosity, and a creel device is required to control tension and prevent fiber damage in order to improve the quality of spreading.

In this way, there is a method of securing sufficient distance between the creel section and the spreading section in order to uniformly control the tension of the fiber and prevent interference and twisting between fibers, but there is a problem of spatial constraints.

The problem to be solved by the present invention is to provide an unwinding creel device including a plurality of pulling rolls and eyelets for maintaining uniform tension and suppressing interference and twisting between fibers when fibers are unwound from a plurality of spool bobbins mounted on each of a plurality of creels.

The technical problems of the present invention are not limited to the technical problems mentioned above, and other technical problems not mentioned will be clearly understood by those skilled in the art to which the present invention belongs from the description below.

An unwinding creel device according to one embodiment comprises a body portion including a plurality of regions and a plurality of creel portion groups arranged in the plurality of regions, each of the plurality of creel portion groups including a plurality of creases spaced apart in a transverse direction on the body portion and having a plurality of bobbin spools respectively mounted thereon, a plurality of pulling rolls spaced apart in a transverse direction on the body portion and spaced apart in a vertical direction from the plurality of creases, and an eyelet arranged on the body portion and including a plurality of holes through which a plurality of fibers unwound from the plurality of bobbin spools respectively pass, wherein each of the plurality of pulling rolls has a different diameter from each other.

The diameter of each of the plurality of pulling rolls may be smaller the closer they are positioned to the eyelet.

The difference in diameter of each of the above plurality of pulling rolls can be 3 to 20 mm.

Each of the above plurality of pulling rolls may include a shaft, two bearings arranged on both sides of the shaft with the shaft as a central axis, and two sealing caps arranged on the outer side of each of the two bearings.

The above eyelets may be arranged so that the contact angle between the fibers released from each of the plurality of bobbin spools and each of the plurality of pulling rolls is 90 to 150 degrees.

The above eyelet may be made of a ceramic material.

The above plurality of regions include first regions and second regions arranged in a horizontal direction on the body portion, and the plurality of creel groups include a first creel group arranged in the first region and a second creel group arranged in the second region, wherein the first eyelet of the first creel group and the second eyelet of the second creel group each include a plurality of first holes spaced apart in the horizontal direction and a plurality of second holes spaced apart in the horizontal direction, wherein the plurality of first holes and the plurality of second holes can be spaced apart in the vertical direction.

The spacing width of the plurality of first holes and the plurality of second holes spaced apart in the vertical direction may be 5 to 50 mm.

Each of the plurality of fibers released from the plurality of bobbin spools mounted on the first creel group can penetrate the plurality of first holes of the first eyelet and the plurality of first holes of the second eyelet, respectively, and each of the plurality of fibers released from the plurality of bobbin spools mounted on the second creel group can penetrate the plurality of second holes of the second eyelet, respectively.

The above body portion further includes a projection protruding horizontally from one side and a third eyelet arranged on the projection, the third eyelet including a plurality of first holes spaced apart in the horizontal direction and a plurality of second holes spaced apart in the horizontal direction, the plurality of first holes and the plurality of second holes are spaced apart in the vertical direction, and the plurality of first holes of the third eyelet are respectively allowed to pass through a plurality of fibers released from a plurality of bobbin spools mounted on the first creel group, and the plurality of second holes of the third eyelet are respectively allowed to pass through a plurality of fibers released from a plurality of bobbin spools mounted on the second creel group.

An unwinding creel device according to one embodiment comprises a body, a plurality of creases spaced apart in a horizontal direction on the body, each of which has a plurality of bobbin spools mounted thereon, a plurality of pulling rolls spaced apart in a horizontal direction on the body, each of which is spaced apart in a vertical direction from the plurality of creases, and an eyelet spaced apart in a vertical direction on the body, each of which has a plurality of holes through which a plurality of fibers unwound from the plurality of bobbin spools pass, wherein each of the plurality of pulling rolls has a different diameter from the other.

The diameter of each of the plurality of pulling rolls may be smaller the closer they are positioned to the eyelet.

The difference in diameter of each of the above plurality of pulling rolls can be 3 to 20 mm.

The above eyelets may be arranged so that the contact angle between the fibers released from each of the plurality of bobbin spools and each of the plurality of pulling rolls is 90 to 150 degrees.

Each of the above plurality of pulling rolls may include a shaft, two bearings arranged on both sides of the shaft with the shaft as a central axis, and two sealing caps arranged on the outer side of each of the two bearings.

Specific details of other embodiments are included in the detailed description and drawings.

In the case of the unwinding creel device according to the embodiments, it can be advantageous in preventing each fiber from interfering or twisting by including a plurality of pulling rolls having different diameters and an eyelet having a plurality of holes through which each fiber unwound from the plurality of groups passes, which is included in one group. Accordingly, it can be advantageous in reducing damage to the fiber due to fuzz and improving the spreading ratio of the fiber.

In addition, the unwinding creel device according to the embodiments may be advantageous in maintaining the tension of the fiber relatively uniformly even when there are spatial constraints.

The effects according to the embodiments of the present invention are not limited to the contents exemplified above, and more diverse effects are included in this specification.

FIG. 1 is a perspective view of an unwinding creel device according to one embodiment.
Figure 2 is a schematic diagram showing the configuration of a first creel group according to one embodiment.
FIG. 3 is a top cross-sectional view of a plurality of pulling rolls included in a first creel group according to one embodiment.
FIG. 4 is a side view of a first eyelet according to one embodiment.
FIG. 5 is a front view showing a shape in which a fiber is unwound by an unwinding creel device according to one embodiment.
Figure 6 is a side view of an eyelet according to another embodiment.
Figure 7 is a side view of an eyelet according to another embodiment.
Figure 8 is a side view of an eyelet according to another embodiment.

The advantages and features of the present invention, and the method for achieving them, will become clear with reference to the embodiments described in detail below together with the accompanying drawings. However, the present invention is not limited to the embodiments disclosed below, but may be implemented in various different forms, and these embodiments are provided only to make the disclosure of the present invention complete and to fully inform a person having ordinary skill in the art to which the present invention belongs of the scope of the invention, and the present invention is defined only by the scope of the claims.

When an element or layer is referred to as being "on" another element or layer, it includes both cases where the other element is directly on top of the other element or layer, or where the other layer or layer is interposed therebetween. Like reference numerals refer to like elements throughout the specification. Shapes, sizes, ratios, angles, numbers, etc., set forth in the drawings for explaining the embodiments are illustrative and therefore the present invention is not limited to the matters illustrated.

Although the terms first, second, etc. are used to describe various components, it is to be understood that these components are not limited by these terms. These terms are merely used to distinguish one component from another. Accordingly, it is to be understood that the first component referred to below may also be the second component within the technical concept of the present invention.

Specific embodiments are described below with reference to the attached drawings.

Figure 1 is a perspective view of an unwinding creel device according to one embodiment. Figure 2 is a schematic diagram showing the configuration of a first creel group according to one embodiment.

Referring to FIGS. 1 and 2, an unwinding creel device (1) according to one embodiment may include a body part (100), a plurality of pulling rolls (200) arranged on the side of the body part (100), a plurality of creases (300) each of which is arranged corresponding to each of the plurality of pulling rolls (200) and on which each of the plurality of spool bobbins (500) is mounted, and a plurality of eyelets (400) including a plurality of holes (H) through which fibers unwound from the spool bobbins (500) pass.

In this specification, an unwinding creel device (1) according to one embodiment is exemplified as having three creels (300) and three pulling rolls (200) forming one creel group (G), and three creel groups arranged in a horizontal direction and four creel groups arranged in a vertical direction, thereby including a total of 12 creel groups, but is not limited thereto.

For example, an unwinding creel device (1) according to another embodiment may, within the scope of the technical idea of the present invention, form one creel group with two or fewer creases (300) and two or fewer pulling rolls (200), or form one creel group with four or more creases (300) and four or more pulling rolls (200). In addition, an unwinding creel device (1) according to another embodiment may include less than 12 creel groups or may include 13 or more creel groups, and accordingly, a structure in which a plurality of creel groups are arranged may be changed.

The body part (100) may include a first region (110), a second region (120), and a third region (130). The first to third regions (110, 120, 130) may be regions for distinguishing a plurality of creel part groups (G) arranged in a horizontal direction. The first to third regions (110, 120, 130) may each include one creel part group (G) in a horizontal direction and four creel part groups (G) in a vertical direction. In other words, the first to third regions (110, 120, 130) of the body part (100) according to one embodiment may each include four creel part groups (G) sequentially arranged in a vertical direction.

The body part (100) may include a plurality of protrusions (140) that protrude horizontally from the side. Since the body part (100) includes four creel part groups (G) arranged in the vertical direction, it may include four protrusions (140). That is, the number of the plurality of protrusions (140) may vary depending on the number of creel part groups (G) arranged in the vertical direction. One eyelet (400) may be arranged on each of the plurality of protrusions (140).

In Fig. 1, it is illustrated that a plurality of protrusions (140) protrude to the left from the third region (130) as the fibers are unwound in the left direction from a plurality of spool bobbins (500) by an unwinding creel device (1) according to one embodiment, but it is not limited thereto. For example, if the direction in which the fibers are unwound from a plurality of spool bobbins (500) is designed to be in the right direction, the plurality of protrusions (140) may have a shape that protrudes to the right from the first region (110).

Hereinafter, for convenience of explanation, the plurality of pulling rolls (200), the plurality of creases (300), and the one eyelet (400) included in the first creel group (G1) will be mainly described, but the arrangement, structure, function, etc. of the plurality of pulling rolls (200), the plurality of creases (300), and the one eyelet (400) included in each of the plurality of creel groups (G) may be substantially the same as the configuration included in the corresponding first creel group (G1).

The first creel group (G1) may include first to third pulling rolls (210, 220, 230), first to third creels (310, 320, 330) and a first eyelet (410).

The first to third creels (310, 320, 330) may be horizontally spaced apart from each other on the first region (110) of the body portion (100). The first to third creels (310, 320, 330) may each be equipped with a spool bobbin (500). The first to third creels (310, 320, 330) may apply various sizes of pipes. For example, the first to third creels (310, 320, 330) may each use a creel chuck to use a 3-inch pipe and a 6-inch pipe in parallel, but are not limited thereto.

The first to third pulling rolls (210, 220, 230) may be spaced apart in the horizontal direction on the first region (110) of the body portion (100). Each of the first to third pulling rolls (210, 220, 230) may be spaced apart in the upper left direction from each of the first to third creels (310, 320, 330). However, the present invention is not limited thereto, and when the direction in which fibers are unwound from a plurality of spool bobbins (500) is designed to be in the right direction, each of the first to third pulling rolls (210, 220, 230) may be spaced apart in the upper right direction from the first to third creels (310, 320, 330).

FIG. 3 is a top cross-sectional view of the first to third pulling rolls of the first creel group according to one embodiment.

Referring to FIG. 3, each of the first to third pulling rolls (210, 220, 230) may be implemented with different diameters. For example, the first diameter (D1) which is the diameter of the first pulling roll (210), the second diameter (D2) which is the diameter of the second pulling roll (220), and the third diameter (D3) which is the diameter of the third pulling roll (230) may be different from each other.

The diameter of each of the first to third pulling rolls (210, 220, 230) may be smaller as they are arranged closer to the first eyelet (410) in the direction in which the fibers are released, that is, as will be described later. For example, the first diameter (D1) may be larger than the second diameter (D2), and the second diameter (D2) may be larger than the third diameter (D3). The first diameter (D1) may be 3 to 20 mm larger than the second diameter (D2), and the second diameter (D2) may be 3 to 20 mm larger than the third diameter (D3).

As a specific example, the first diameter (D1) may be 68 mm, the second diameter (D2) may be 63 mm, and the third diameter (D3) may be 58 mm, but is not limited thereto.

In this way, by making the diameter of each of the plurality of pulling rolls (210, 220, 230) included in a single creel group relatively smaller as they are arranged adjacently in the direction in which the fibers are released, a step is formed between the plurality of pulling rolls (210, 220, 230), and accordingly, when the plurality of fibers are released from the plurality of spool bobbins (500) mounted on the plurality of creases (310, 320, 330) corresponding to each of the plurality of pulling rolls (210, 220, 230), it can be advantageous in preventing interference between the plurality of fibers.

When the difference between the first diameter (D1) and the second diameter (D2) and the difference between the second diameter (D2) and the third diameter (D3) is less than 3 mm, there is a concern that interference may occur between the multiple fibers when the multiple fibers are unwound from the multiple spool bobbins (500) mounted on the multiple creels (310, 320, 330), and when the difference between the first diameter (D1) and the second diameter (D2) and the difference between the second diameter (D2) and the third diameter (D3) exceeds 20 mm, there may be difficulty in uniformly maintaining the tension of each of the multiple fibers.

Each of the first to third pulling rolls (210, 220, 230) may include two bearings spaced apart therein to reduce friction and resistance when the fiber is released, and may include two sealing caps to prevent the fiber from flowing in when rotating. For example, the first pulling roll (210) may include a first bearing (212) and a second bearing (213) arranged on both sides with a shaft (211) as the central axis, and a first sealing cap (214) and a second sealing cap (215) arranged on the outer side of each of the first bearing (212) and the second bearing (213), as illustrated in FIG. 3.

Referring again to FIG. 2, the first eyelet (410) may be arranged on the first region (110) spaced apart from the first to third pulling rolls (210, 220, 230) in the upper right direction. Each of the plurality of fibers released from the spool bobbin (500) mounted on each of the first to third creels (310, 320, 330) may pass through the first eyelet (410) via the first to third pulling rolls (210, 220, 230).

The first eyelet (410) may be arranged so that the contact angle at which each of the plurality of fibers contacts the first to third pulling rolls (210, 220, 230) is 90 to 150 degrees. With this structure, it may be advantageous to reduce resistance and friction between the plurality of fibers and the first to third pulling rolls (210, 220, 230), while reducing interference between the plurality of fibers and maintaining the tension of the plurality of fibers uniformly. When the contact angle at which each of the plurality of fibers contacts the first to third pulling rolls (210, 220, 230) is less than 90 degrees, friction and resistance between the first to third pulling rolls (210, 220, 230) and the plurality of fibers increase, making it difficult for the plurality of fibers to be smoothly unwound. In addition, if the contact angle of each of the plurality of fibers with the first to third pulling rolls (210, 220, 230) exceeds 150 degrees, it may be difficult to make the tension of each of the plurality of fibers uniform.

The first eyelet (410) may be made of a ceramic material. Accordingly, it may be advantageous to maintain the tension of the fiber released from the spool bobbin (500) evenly and reduce friction and resistance between the fiber and the first to third pulling rolls (210, 220, 230) to prevent damage to the fiber.

FIG. 4 is a side view of a first eyelet according to one embodiment.

The first eyelet (410) may include a plurality of holes (H) through which the fibers pass, as illustrated in FIG. 4. Each of the plurality of holes (H) may have a rectangular shape with rounded corners. However, the present invention is not limited thereto, and may have other polygonal shapes such as a circle, an oval, a square with rounded corners, a triangle, etc.

The plurality of holes (H) may include a plurality of first holes (H1), a plurality of second holes (H2), and a plurality of third holes (H3). The plurality of first holes (H1), the plurality of second holes (H2), and the plurality of third holes (H3) may be arranged to be spaced apart from each other in the vertical direction. In other words, the plurality of first holes (H1), the plurality of second holes (H2), and the plurality of third holes (H3) may be arranged to have a height difference.

For example, the first spacing width (T1) between the first hole (H2) and the second hole (H2) and the second spacing width (T1) between the second hole (H2) and the third hole (H3) may be 5 to 50 mm. In addition, each of the plurality of first holes (H1), the plurality of second holes (H2), and the plurality of third holes (H3) may be arranged to be spaced apart from each other in the horizontal direction.

The plurality of first holes (H1), the plurality of second holes (H2), and the plurality of third holes (H3) may each be holes through which a plurality of fibers released from a spool bobbin (500) of one creel group (G) pass. For example, the plurality of first holes (H1) may be holes through which fibers released from a creel group (G) arranged in a first region (110) pass, the plurality of second holes (H2) may be holes through which fibers released from a creel group (G) arranged in a second region (120) pass, and the plurality of third holes (H3) may be holes through which fibers released from a creel group (G) arranged in a third region (130) pass.

The first hole (H1) of the first eyelet (410) may be a hole through which a plurality of fibers released from the spool bobbin (500) of the first creel group (G1) pass through, respectively. For example, a fiber passing through the first pulling roll (210) may pass through a hole arranged on the left among the plurality of first holes (H1), a fiber passing through the second pulling roll (220) may pass through a hole arranged in the middle among the plurality of first holes (H1), and a fiber passing through the third pulling roll (230) may pass through a hole arranged on the right among the plurality of first holes (H2), but is not limited thereto.

According to one embodiment, the unwinding creel device (10) may be a hole through which the fiber does not pass, since the fiber is unwound in the right direction. However, in another embodiment, if the unwinding creel device (10) is implemented so that the fiber is unwound in the right direction, the second hole (H2) of the first eyelet (410) may be a hole through which the fiber unwound in the creel group (G) arranged in the second region (120) passes, and the third hole (H3) of the first eyelet (410) may be a hole through which the fiber unwound in the creel group (G) arranged in the third region (120) passes.

FIG. 5 is a front view showing a shape in which a fiber is unwound by an unwinding creel device according to one embodiment.

Referring to FIGS. 4 and 5, each of a plurality of first fibers (F1) released from a spool bobbin (500) mounted on a first creel group (G1) can penetrate each of a plurality of first holes (H1) of the first to fourth eyelets (410, 420, 430, 440), each of a plurality of second fibers (F2) released from a spool bobbin (500) mounted on a second creel group (G1) can penetrate each of a plurality of second holes (H2) of the second to fourth eyelets (420, 430, 440), and each of a plurality of third fibers (F3) released from a spool bobbin (500) mounted on a third creel group (G3) can penetrate each of a plurality of third holes (H3) of the third and fourth eyelets (430, 440).

In this way, the unwinding creel device (10) according to one embodiment includes a plurality of creel group (G) arranged in a horizontal direction, and each of the plurality of creel group (G) may include an eyelet (400) arranged in a direction in which fibers are released and provided with a hole (H) through which each of the plurality of fibers released from the plurality of creel group (G) passes. Here, the holes (H) through which each of the plurality of fibers released from the plurality of creel group (G) passes are arranged to be spaced apart from each other in the vertical direction, which may be advantageous in reducing interference between fibers when fibers are released from each of the plurality of creel group (G).

Furthermore, the unwinding creel device (10) according to one embodiment includes a plurality of creel groups (G), each of which includes one eyelet (400), a plurality of protrusions (140) corresponding to the number of the plurality of creel groups (G) arranged in the vertical direction, and a plurality of fourth eyelets (440) respectively disposed on the plurality of protrusions (140), thereby advantageously controlling the tension of a fiber unwound from the unwinding creel device (10) even when the distance between the unwinding creel device (10) and the spreading member (not shown) is relatively short.

Fig. 6 is a side view of an eyelet according to another embodiment. Fig. 7 is a side view of an eyelet according to another embodiment. Fig. 8 is a side view of an eyelet according to another embodiment.

The embodiments of FIGS. 6 to 8 differ from the embodiment of FIG. 4 in that the positions at which the plurality of first holes (H1), the plurality of second holes (H2), and the plurality of third holes (H3) are formed are different.

As described above with reference to FIG. 4, the plurality of first holes (H1), the plurality of second holes (H2), and the plurality of third holes (H3) are arranged to be spaced apart from each other in the vertical direction, but each of the plurality of first holes (H1), the plurality of second holes (H2), and the plurality of third holes (H3) can be arranged to be spaced apart from each other in the horizontal direction.

In this case, the plurality of first holes (H1), the plurality of second holes (H2), and the plurality of third holes (H3) may be formed to be spaced apart from each other in the vertical direction but parallel to each other as shown in Fig. 4, but are not limited thereto.

As a specific example, the plurality of first holes (H1), the plurality of second holes (H2), and the plurality of third holes (H3) may have a stepped shape in the vertical direction as illustrated in FIG. 6, or may have a sequentially staggered shape in the vertical direction as illustrated in FIG. 7. In addition, the plurality of first holes (H1), the plurality of second holes (H2), and the plurality of third holes (H3) may be formed such that the spacing between the plurality of first holes (H1), the spacing between the plurality of second holes (H2), and the spacing between the plurality of third holes (H3) are different from each other as illustrated in FIG. 8.

That is, the eyelets (400) according to the embodiments have holes (H) that each of the plurality of fibers released from the plurality of creel groups (G) penetrates, which are spaced apart from each other in the vertical direction to prevent interference or twisting between the fibers, and the positions of the holes (H) through which the plurality of fibers released from each creel group (G) penetrate (e.g., positions of the plurality of first holes (H)) may be formed at various positions on the same horizontal plane.

Hereinafter, one embodiment of the present invention will be described in more detail through examples and comparative examples. However, the following examples are provided only for the purpose of illustration to help understanding of the present invention, and the scope of the present invention is not limited thereby.

<Example 1>

The loss amount and spreading ratio of released fibers were measured using an unwinding creel device (10) including a plurality of eyelets (400) having a plurality of first to third holes (H1, H2, H3) spaced apart in the vertical direction through which fibers released from each of a plurality of creel groups (G) are passed, and a pulling roll (200) having steps applied (i.e., different diameters) is arranged vertically, respectively.

<Example 2>

The loss amount and spreading ratio of released fibers were measured using an unwinding creel device (10) in which each of the creel groups (G) does not include a pulling roll (200) and includes a plurality of eyelets (400) having a plurality of first to third holes (H1, H2, H3) arranged vertically and spaced apart from each other in the vertical direction through which released fibers pass.

<Example 3>

The loss amount and opening rate of released fibers were measured using an unwinding creel device (10) including a plurality of eyelets (400) arranged at the same height, each of which includes a pulling roll (200) having steps applied (i.e., different diameters) and a plurality of first to third holes (H1, H2, H3) through which released fibers pass from each of a plurality of creel groups (G) arranged in the vertical direction.

<Comparative Example>

The loss amount and opening rate of released fibers were measured using an unwinding creel device (10) in which each of the creel groups (G) does not include a pulling roll (200) and includes a plurality of eyelets (400) arranged at the same height and a plurality of first to third holes (H1, H2, H3) through which released fibers pass from each of the plurality of creel groups (G) arranged in the vertical direction.

<Method of Measuring Physical Properties>

(1) Fiber loss: The weight difference before and after opening per unit length, i.e., the weight of 1 meter or 5 meters of fiber before and after opening, was measured using an electronic scale.

(2) Opening rate: The change in the width of the carbon fiber before and after opening. That is, the carbon fiber with a filament count of 12k and a width of 5mm before opening was opened and the width after opening was measured. The width of the carbon fiber before opening (5mm) and the width after opening were calculated as a percentage.

division Conditions of application Measurement value Including pulling rolls of different diameters Multiple holes (H1, H2, H3) formed in the eyelet Fiber loss Opening rate Example 1 O Apply height difference less than 1% 240% Example 2 X Apply height difference 2% 180% Example 3 O Height schedule 5% 220% Comparative example X Height schedule 7% 170%

Specifically, referring to Table 1, Example 1 was measured to have a fiber loss of less than 1% and an opening rate of 240%, Example 2 was measured to have a fiber loss of 2% and an opening rate of 180%, and Example 3 was measured to have a fiber loss of 5% and an opening rate of 220%. On the other hand, the comparative example was measured to have a fiber loss of 7% and an opening rate of 170%.

Referring to the results of Example 1 and Example 3, when the unwinding creel device (1) includes a plurality of pulling rolls (200) in which each creel group (G) has a step applied, it is advantageous in preventing interference between unwound fibers, thereby reducing damage to fibers due to fuzz, and at the same time increasing the opening rate by facilitating unwinding of fibers.

In addition, referring to the results of Examples 1 and 2, the unwinding creel device (10) can advantageously prevent vertical fiber interference and increase the fiber opening rate by applying a height difference to a plurality of first to third holes (H1, H2, H3) through which fibers released from each of a plurality of creel group (G) arranged in the vertical direction pass.

The individual features of the various embodiments of the present invention may be partially or wholly combined or combined with each other, and may be technically linked and driven in various ways, and each embodiment may be implemented independently of each other or implemented together in a related relationship.

Although the embodiments of the present invention have been described with reference to the attached drawings, it will be understood by those skilled in the art that the present invention may be implemented in other specific forms without changing the technical spirit or essential features of the present invention. These embodiments are not intended to limit the invention but are merely illustrative, and should be considered from an illustrative rather than a restrictive perspective. Although specific terms have been used in this specification, they have been used only for the purpose of explaining the concept of the present invention, and have not been used to limit the scope of the present invention as set forth in the claims or in the meaning thereof. Therefore, the embodiments described above should be understood as illustrative and not restrictive in all respects.

10: Unwinding krill device 100: Body part
110: Area 1 140: Protrusion
200: Pulling Roll 210: Axis
220: 1st bearing 240: 1st sealing cap
300: Krill 400: Eyelet
H1: 1st hole G1: 1st creel group

Claims (15)

a body portion comprising multiple regions; and
comprising a plurality of krill groups arranged in the above-mentioned multiple areas;
The above multiple krill groups are each,
A plurality of creels spaced apart horizontally on the above body portion, each of which has a plurality of bobbin spools mounted thereon;
A plurality of pulling rolls spaced apart horizontally on the above body portion and spaced apart vertically from the plurality of creels, and
It comprises an eyelet disposed on the body portion and including a plurality of holes through which a plurality of fibers unwound from the plurality of bobbin spools each penetrate,
The above-mentioned plurality of pulling rolls each have different diameters, and the unwinding creel device. In the first paragraph,
An unwinding creel device in which each of the plurality of pulling rolls has a smaller diameter the closer they are positioned to the eyelet. In the second paragraph,
An unwinding creel device wherein the difference in diameter of each of the plurality of pulling rolls is 3 to 20 mm. In the first paragraph,
An unwinding creel device, wherein each of the plurality of pulling rolls includes an axis, two bearings arranged on both sides of the axis with the axis as a central axis, and two sealing caps arranged on the outer side of each of the two bearings. In the first paragraph,
An unwinding creel device in which the above eyelets are arranged so that the contact angle between the fibers released from each of the plurality of bobbin spools and each of the plurality of pulling rolls is 90 to 150 degrees. In the first paragraph,
The above eyelet is an unwinding creel device made of ceramic material. In the first paragraph,
The above plurality of regions include a first region and a second region arranged in a horizontal direction on the body portion,
The above plurality of creel groups include a first creel group arranged in the first region and a second creel group arranged in the second region,
The first eyelet of the first creel group and the second eyelet of the second creel group each include a plurality of first holes spaced apart in the horizontal direction and a plurality of second holes spaced apart in the horizontal direction,
An unwinding creel device in which the plurality of first holes and the plurality of second holes are spaced apart from each other in the vertical direction. In Article 7,
An unwinding creel device in which the plurality of first holes and the plurality of second holes are spaced apart from each other in the vertical direction at a spacing of 5 to 50 mm. In Article 7,
Each of the plurality of fibers released from the plurality of bobbin spools mounted on the first creel group passes through the plurality of first holes of the first eyelet and the plurality of first holes of the second eyelet, respectively.
An unwinding creel device in which a plurality of fibers released from a plurality of bobbin spools mounted on the second creel group each pass through a plurality of second holes of the second eyelet. In Article 7,
The above body portion further includes a protrusion protruding horizontally from one side and a third eyelet arranged on the protrusion,
The third eyelet comprises a plurality of first holes spaced apart in the horizontal direction and a plurality of second holes spaced apart in the horizontal direction, and the plurality of first holes and the plurality of second holes are spaced apart in the vertical direction,
An unwinding creel device in which the plurality of first holes of the third eyelet each pass through a plurality of fibers released from a plurality of bobbin spools mounted on the first creel group, and the plurality of second holes of the third eyelet each pass through a plurality of fibers released from a plurality of bobbin spools mounted on the second creel group. body part;
A plurality of creels spaced apart horizontally on the above body portion, each having a plurality of bobbin spools mounted thereon;
A plurality of pulling rolls spaced apart horizontally on the above body portion and spaced apart vertically from the plurality of creels; and
An eyelet is disposed on the body portion and includes a plurality of holes through which a plurality of fibers unwound from the plurality of bobbin spools each pass;
An unwinding creel device wherein each of the plurality of pulling rolls has a different diameter. In Article 11,
An unwinding creel device in which each of the plurality of pulling rolls has a smaller diameter the closer they are positioned to the eyelet. In Article 12,
An unwinding creel device wherein the difference in diameter of each of the plurality of pulling rolls is 3 to 20 mm. In Article 11,
An unwinding creel device in which the above eyelets are arranged so that the contact angle between the fibers released from each of the plurality of bobbin spools and each of the plurality of pulling rolls is 90 to 150 degrees. In Article 11,
An unwinding creel device, wherein each of the plurality of pulling rolls includes an axis, two bearings arranged on both sides of the axis with the axis as a central axis, and two sealing caps arranged on the outer side of each of the two bearings.