KR102664950B1 - Apparatus and method for opening of glass fiber fabric - Google Patents

Abstract

An apparatus and method for opening glass fiber fabric are disclosed. An opening device for glass fiber fabric according to an embodiment disclosed includes a first opening processing unit that performs a first opening treatment on the glass fiber fabric by spraying water, and a first opening treatment unit that performs a first opening treatment on the first opening treated glass fiber fabric by applying pressure. It includes a second opening processing unit that performs two opening processing, and a third opening processing unit that performs a third opening processing by ultrasonic vibration on the second opening treated glass fiber fabric.

Description

Apparatus and method for opening glass fiber fabric {APPARATUS AND METHOD FOR OPENING OF GLASS FIBER FABRIC}

Embodiments of the present invention relate to opening techniques for glass fiber fabrics.

Copper Clad Laminate (CCL) used in printed circuit boards (PCBs) is made by coating copper foil on both sides of a prepreg. The prepreg is made by impregnating glass fiber fabric with resin. It has been hardened. Here, before being impregnated with resin, the glass fiber fabric is opened to flatten the surface, reduce its thickness, and improve resin impregnation.

Korean Patent Publication No. 10-1041420 (2011.06.15)

Embodiments of the present invention are intended to provide a device and method for opening glass fiber fabric that can improve opening efficiency.

An opening device for glass fiber fabric according to an embodiment disclosed includes: a first opening processing unit that performs a first opening treatment on glass fiber fabric by spraying a water stream; a second opening processing unit that performs a second opening treatment using pressure on the first opening treated glass fiber fabric; and a third opening processing unit that performs a third opening treatment using ultrasonic vibration on the second opening treated glass fiber fabric.

The first carding processing unit includes a first transfer roll that transfers the glass fiber fabric to the second carding processing unit; And it may include one or more sprays disposed on top of the glass fiber fabric transported by the first transfer roll and provided to spray a water stream on the surface of the glass fiber fabric.

A plurality of sprays are provided at the top of the glass fiber fabric to be spaced apart from each other along the width direction of the glass fiber fabric, and the ranges of water streams sprayed from neighboring sprays among the plurality of sprays may be provided to overlap each other. there is.

The first transfer roll includes a 1-1 transfer roll and a 1-2 transfer roll disposed spaced apart from each other, and at least one of the 1-1 transfer roll and the 1-2 transfer roll is height adjustable. This is possible, and the first opening process can be performed in a state where there is a height difference between the 1-1 transfer roll and the 1-2 transfer roll.

The first transfer roll includes a 1-1 transfer roll and a 1-2 transfer roll arranged to be spaced apart from each other, and the 1-1 transfer roll and the 1-2 transfer roll are arranged at the same height. , the first opening process may be performed in a state where the rotation speeds of the 1-1 transfer roll and the 1-2 transfer roll are different.

The 1-2 transfer roll is disposed closer to the second carding processing unit than the 1-1 transfer roll, and the first carding process is performed when the rotation speed of the 1-2 transfer roll is adjusted to the 1-1 transfer roll. It can be performed at a slower speed than the rotation speed of the roll.

The second opening processing unit is disposed behind the spray in the transport direction of the glass fiber fabric, is disposed to face the glass fiber fabric with the glass fiber fabric interposed therebetween, and splits the glass fiber fabric from the upper and lower sides of the glass fiber fabric. It may include a pair of compression rolls, each compressing.

The third carding processing unit includes a first water tank containing a liquid therein and in which the glass fiber fabric that has passed the second carding processing unit is immersed; a second water tank containing liquid therein, provided below the first water tank, and provided so that the lower end of the first water tank is submerged; And it may be provided at the bottom of the second water tank and include one or more ultrasonic vibrators that generate ultrasonic vibration.

The third opening processing unit may further include a bubble removal unit provided in the second water tank and configured to discharge liquid toward the lower surface of the first water tank to remove air bubbles generated on the lower surface of the first water tank. there is.

The bubble removal unit is provided in the form of a pipe to allow the liquid to move therein, an end of the bubble removal unit is provided to face the lower surface of the first water tank, and a screw may be provided therein.

The third opening processing unit includes a first expander roll that bends the transfer direction of the glass fiber fabric that has passed through the second opening processing unit downward to provide tension to the glass fiber fabric before being immersed in the first water tank; a second transfer roll provided in the first water tank and including a 2-1 transfer roll disposed on one side of the first water tank and a 2-2 transfer roll disposed on the other side of the first water tank; And it may further include a second expander roll that bends the transfer direction of the glass fiber fabric passing through the 2-2 transfer roll upward to apply tension to the glass fiber fabric after immersion.

A method of opening a glass fiber fabric according to an embodiment disclosed includes the steps of: performing a first carding treatment by spraying a water stream on a glass fiber fabric in a first carding processing unit; In a second opening processing unit, performing a second opening treatment using pressure on the first opening treated glass fiber fabric; and performing, in a third opening processing unit, a third opening treatment by ultrasonic vibration on the second opening treated glass fiber fabric.

According to the disclosed embodiment, a first opening treatment is performed by water jet, a second opening treatment is performed on the first opening treated glass fiber fabric by pressure, and the second opening treatment is performed on the glass fiber fabric by ultrasonic vibration. By sequentially performing the third opening process, it is possible to improve opening efficiency while opening the glass fiber fabric uniformly.

1 is a diagram showing a carding device for glass fiber fabric according to an embodiment of the present invention;
Figure 2 is a diagram schematically showing a state in which a plurality of sprays spray a water stream on a glass fiber fabric in one embodiment of the present invention;
Figure 3 is a diagram showing a state of adjusting the tension applied to the glass fiber fabric in one embodiment of the present invention.

Hereinafter, specific embodiments of the present invention will be described with reference to the drawings. The detailed description below is provided to provide a comprehensive understanding of the products described herein. However, this is only an example and the present invention is not limited thereto.

In describing the embodiments of the present invention, if it is determined that a detailed description of the known technology related to the present invention may unnecessarily obscure the gist of the present invention, the detailed description will be omitted. In addition, the terms described below are terms defined in consideration of functions in the present invention, and may vary depending on the intention or custom of the user or operator. Therefore, the definition should be made based on the contents throughout this specification. The terminology used in the detailed description is only for describing embodiments of the present invention and should in no way be limiting. Unless explicitly stated otherwise, singular forms include plural meanings. In this description, expressions such as “comprising” or “including” are intended to indicate certain features, numbers, steps, operations, elements, parts or combinations thereof, and one or more than those described. It should not be construed to exclude the existence or possibility of any other characteristic, number, step, operation, element, or part or combination thereof.

Meanwhile, directional terms such as upper side, lower side, one side, other side, etc. are used in relation to the orientation of the disclosed drawings. Since the components of embodiments of the present invention can be positioned in various orientations, the term directional is used for illustrative purposes and is not limiting.

1 is a diagram showing a carding device for glass fiber fabric according to an embodiment of the present invention.

Referring to FIG. 1, the carding device 100 for glass fiber fabric may include a first carding unit 102, a second carding unit 104, and a third carding unit 106.

Here, the first carding unit 102, the second carding unit 104, and the third carding unit 106 may be provided to perform continuous processes.

That is, the first carding unit 102 performs the first carding process by spraying water, the second carding unit 104 performs the second carding process by pressure, and the third carding unit 106 Can perform a third card opening process using ultrasonic vibration. At this time, the first carding process, the second carding process, and the third cardboard processing process are performed sequentially and continuously.

The first opening processing unit 102 may be provided to perform an opening treatment by spraying a water stream before the glass fiber fabric 50 is subjected to an ultrasonic opening treatment. That is, the glass fiber fabric 50 may be wetted through a water jet before being subjected to an ultrasonic opening process. The first opening processing unit 102 may include a winding roll 111, a first transfer roll 113, and a spray 115.

Glass fiber fabric 50 may be wound around the winding roll 111. The glass fiber fabric 50 is obtained by weaving a glass fiber bundle composed of multiple lines of glass fibers, and can be formed by producing long and weft yarns. The thickness of the glass fiber fabric 50 may be 10 to 50㎛, but is not limited thereto. Additionally, the thickness of the glass fiber in the glass fiber fabric 50 may be 3 to 25 ㎛, but is not limited thereto.

One or more first transfer rolls 113 may be provided. The first transfer roll 113 can unwind the glass fiber fabric 50 wound on the winding roll 111 and transfer it to the second carding processing unit 104. The speed at which the first transfer roll 113 transfers the glass fiber fabric 50 (i.e., the transfer speed) is appropriately determined according to the thickness of the glass fiber fabric 50 or the number of glass fiber bundles in the glass fiber fabric 50. It can be adjusted.

The first transfer roll 113 may include a 1-1 transfer roll 113-1 and a 1-2 transfer roll 113-2. The 1-1 transfer roll (113-1) is disposed on the side of the winding roll 111, and the 1-2 transfer roll (113-2) is the 1-1 transfer roll in the transfer direction of the glass fiber fabric 50. (113-1) It can be placed further back.

The spray 115 can spray a water stream on the glass fiber fabric 50 transported by the first transfer roll 113. Spray 115 may be provided to spray a water stream onto the surface of the glass fiber fabric 50 from the top of the glass fiber fabric 50. In an exemplary embodiment, a plurality of sprays 115 may be provided.

Figure 2 is a diagram schematically showing a state in which a plurality of sprays 115 spray a water stream onto a glass fiber fabric 50 in an embodiment of the present invention. Referring to FIG. 2 , a plurality of sprays 115 may be provided at the top of the glass fiber fabric 50 to be spaced apart from each other along the width direction of the glass fiber fabric 50 .

In Figure 2, the number of sprays 115 is shown as three, but the number of sprays 115 is not limited to this, and the number of sprays 115 is determined by the width of the glass fiber fabric 50 and the glass fiber fabric 50. ) can be appropriately adjusted depending on the distance between the spray 115 and the spray 115.

Here, when the glass fiber fabric 50 is transported by the first transfer roll 113, a plurality of sprays 115 may be provided to spray a water stream across the entire width direction of the glass fiber fabric 50. At this time, the ranges of water streams sprayed from the plurality of sprays 115 may be arranged to overlap (i.e., overlap) each other.

In other words, the water stream sprayed from each spray 115 may be arranged to spread out toward the glass fiber fabric 50 . At this time, the distance between the sprays 115, the distance between the spray 115 and the glass fiber fabric 50, and the water pressure of the spray 115 are adjusted so that the ranges of water streams sprayed from the neighboring sprays 115 overlap each other. It can be.

In this way, the ranges of the water streams sprayed from neighboring sprays 115 among the plurality of sprays 115 are arranged to overlap each other, so that the flow rate distribution of the water streams is uniform across the width direction of the glass fiber fabric 50. As a result, the glass fiber fabric 50 can be uniformly opened.

The water stream sprayed from each spray 115 is sprayed in the form of water droplets such as water mist, and as these water droplets collide with the surface of the glass fiber fabric 50 and apply pressure, the filament and weft yarns constituting the glass fiber fabric 50 is processed for re-opening.

When the glass fiber fabric 50 is immersed in a liquid for ultrasonic opening processing in the third opening processing unit 106, the glass fibers in the glass fiber fabric 50 tend to shrink by getting wet, causing wrinkles in the glass fiber fabric 50. This is easy to happen.

In the embodiment disclosed herein, the glass fiber fabric 50 is subjected to the ultrasonic opening process by being subjected to the ultrasonic opening process by water jetting before being subjected to the ultrasonic opening treatment, so that the glass fiber fabric 50 is subjected to the ultrasonic opening process while being wetted by the water jet jet. Even if the glass fiber fabric 50 is immersed in liquid during processing, the strain in the width direction can be reduced, thereby suppressing the occurrence of wrinkles in the glass fiber fabric 50.

Meanwhile, when the glass fiber fabric 50 is opened by spraying water, the tension applied to the glass fiber fabric 50 can be maintained within a preset range. That is, in order to sufficiently and uniformly open the filament and weft yarns of the glass fiber fabric 50, the opening treatment by water jetting can be performed with the influence of tension minimized (i.e., in the storage force range).

At this time, the tension applied to the glass fiber fabric 50 is the height between the 1-1 transfer roll 113-1 and the 1-2 transfer roll 113-2, as shown in (a) of FIG. 3. It can be adjusted by car. For example, the height difference between the 1-1 transfer roll (113-1) and the 1-2 transfer roll (113-2) can be adjusted by adjusting the height of the 1-2 transfer roll (113-2). , This makes it possible to adjust the tension applied to the glass fiber fabric 50.

In addition, when the 1-1 transfer roll (113-1) and the 1-2 transfer roll (113-2) are arranged at the same height, as shown in (b) of FIG. 3, the glass fiber fabric 50 ) can be adjusted by varying the rotation speed of the 1-1 transfer roll (113-1) and the 1-2 transfer roll (113-2). For example, the tension applied to the glass fiber fabric 50 can be lowered by making the rotation speed of the 1-2 transfer roll (113-2) smaller than the rotation speed of the 1-1 transfer roll (113-1). do.

The second carding unit 104 is disposed behind the first carding unit 102 and in front of the third carding unit 106 in the transport direction of the glass fiber fabric 50. The second opening processing unit 104 may be composed of a pair of compression rolls 104-1 and 104-2 for pressing the glass fiber fabric 50.

A pair of compression rolls 104-1 and 104-2 may be arranged to face each other with the glass fiber fabric 50 interposed therebetween. A pair of compression rolls 104-1 and 104-2 may serve to compress the glass fiber fabric 50 from the upper and lower sides, respectively. For example, the pressurization by a pair of compression rolls 104-1 and 104-2 can be 0.1 to 5 MPa.

Here, the glass fiber fabric 50 (in particular, the weft yarn of the glass fiber fabric 50) can be carded by pressing the glass fiber fabric 50 in its thickness direction through the second card opening unit 104. The direction of the weft of the glass fiber fabric 50 is the same as the transport direction of the glass fiber fabric 50, and the direction of the longitudinal yarn of the glass fiber fabric 50 is the same as the width direction of the glass fiber fabric 50.

At this time, the rotation speed of the pair of compression rolls 104-1 and 104-2 may be different from the rotation speed of the first transfer roll 113 (i.e., the transfer speed of the glass fiber fabric 50). For example, the rotation speed of the pair of compression rolls 104-1 and 104-2 can be made faster than the transfer speed of the glass fiber fabric 50. In this case, the glass fiber of the weft yarn of the glass fiber fabric 50 is pressed by the outer peripheral surface of the pair of compression rolls 104-1 and 104-2 and is pulled in the transport direction of the glass fiber fabric 50, so that the glass fiber It becomes easy to align in the transfer direction, and as a result, the weft yarns of the glass fiber fabric 50 become flat, making it possible to improve the open state of the weft yarns.

Meanwhile, in the disclosed embodiment, the opening effect of the glass fiber fabric 50 is improved by applying pressure treatment by the second opening processing unit 104 while the glass fiber fabric 50 is wetted through water jetting. It becomes possible. That is, because the glass fiber fabric 50 is wetted and moisture exists between the single glass fibers constituting the glass fiber fabric 50, the single glass fibers are easy to move without disturbing the fabric, and as a result, By applying pressure from a pair of compression rolls 104-1 and 104-2, the distribution of short glass fibers becomes more uniform and flattened, thereby increasing the opening effect.

The third carding unit 106 is disposed behind the second carding unit 104 in the transport direction of the glass fiber fabric 50. The third card opening unit 106 can card the glass fiber fabric 50 by ultrasonic vibration. The third opening processing unit 106 may include a first water tank 121, a second water tank 123, a first expander roll 125, a second transfer roll 127, and a second expander roll 129. there is.

The first water tank 121 is a tank in which liquid is stored. For example, the liquid may be water, but is not limited thereto. The glass fiber fabric 50 that has passed through the second opening processing unit 104 may be immersed into the first water tank 121.

The second water tank 123 may be provided below the first water tank 121. The second water tank 123 is a tank in which liquid is stored. For example, the liquid may be water, but is not limited thereto. The second water tank 123 may be provided to have a larger volume than the first water tank 121. The first water tank 121 may be provided such that its lower end is submerged in the second water tank 123. That is, it may have a double water tank structure in which a portion of the first water tank 121 is submerged inside the second water tank 123.

An ultrasonic vibrator 131 may be installed inside the second water tank 123. For example, one or more ultrasonic vibrators 131 may be installed at the bottom of the second water tank 123. A plurality of ultrasonic vibrators 131 may be installed on the bottom of the second water tank 123 at regular intervals. The frequency of the ultrasonic vibrator 131 may be 20 to 200 kHz, but is not limited thereto.

Vibration by the ultrasonic vibrator 131 is transmitted to the first water tank 121 through the second water tank 123. Here, since the vibration caused by the ultrasonic vibrator 131 is transmitted to the first water tank 121 through the second water tank 123, the ultrasonic vibration is uniformly transmitted within the first water tank 121, and as a result, the first water tank 123 The glass fiber fabric 50 that is immersed and transported in (121) can be uniformly opened by ultrasonic vibration.

Additionally, a bubble removal unit 133 may be provided in the second water tank 123. The bubble removal unit 133 may be provided to remove bubbles generated on the lower surface of the first water tank 121. That is, when the ultrasonic vibrator 131 operates, bubbles may be generated on the lower surface of the first water tank 121 due to ultrasonic vibration. At this time, if bubbles are generated on the lower surface of the first water tank 121, ultrasonic vibrations cannot be uniformly transmitted within the first water tank 121.

Accordingly, in the disclosed embodiment, bubbles generated on the lower surface of the first water tank 121 can be removed through the bubble removal unit 133. The bubble removal unit 133 may be provided to remove bubbles generated on the lower surface of the first water tank 121 by releasing liquid toward the lower surface of the first water tank 121 .

The bubble removal unit 133 may be provided in the form of a pipe through which liquid can move. At this time, the liquid may be the same as the liquid filled in the second water tank 123. The end of the bubble removal unit 133 may be provided to face the lower surface of the first water tank 121 within the second water tank 123. At this time, a screw may be provided inside the bubble removal unit 133. That is, a screw may be provided inside the bubble removal unit 133 to increase the straightness and flow rate of the liquid discharged from the bubble removal unit 133. For example, a screw may be provided by forming a spiral groove on the inner wall of the bubble removal unit 133.

Additionally, a water quality improvement device (not shown) may be provided in the second water tank 123 to improve the water quality of the liquid in the second water tank 123. The water quality improvement device (not shown) can suck the liquid in the second water tank 123, perform water quality improvement treatment, and then inject it back into the second water tank 123.

The first expander roll 125 may be disposed between the second carding processing unit 104 and the first water tank 121. That is, the first expander roll 125 may be prepared before the glass fiber fabric 50 is immersed into the first water tank 121.

The first expander roll 125 may serve to bend the transport direction of the glass fiber fabric 50 downward. The first expander roll 125 bends the transport direction of the glass fiber fabric 50 downward, thereby applying tension to the glass fiber fabric 50 before the glass fiber fabric 50 is immersed in the first water tank 121. This can reduce the strain in the width direction when the glass fiber fabric 50 is immersed in the first water tank 121, thereby preventing wrinkles from occurring in the glass fiber fabric 50. can be suppressed. At this time, the first expander roll 125 may apply tension in the weft direction to the glass fiber fabric 50.

The second transfer roll 127 may be provided in the first water tank 121. The second transfer roll 127 may serve to transfer the glass fiber fabric 50 within the first water tank 121. The second transfer roll 127 may include a 2-1 transfer roll 127-1 and a 2-2 transfer roll 127-2.

The 2-1 transfer roll 127-1 may be disposed on one side of the first water tank 121 (the side where the glass fiber fabric 50 is immersed). The 2-2 transfer roll (127-2) may be disposed on the other side of the first water tank (121). The 2-1st transfer roll (127-1) and the 2-2nd transfer roll (127-2) may be provided at the same height. In this case, the glass fiber fabric 50 moves horizontally between the 2-1st transfer roll (127-1) and the 2-2nd transfer roll (127-2).

The second expander roll 129 may be disposed outside the first water tank 121 and at the rear of the first water tank 121. The second expander roll 129 may serve to bend the transport direction of the glass fiber fabric 50 being immersed and transported in the first water tank 121 upward.

The second expander roll 129 may serve to apply tension to the glass fiber fabric 50 in the weft direction when the glass fiber fabric 50 is taken out of the first water tank 121. That is, if the first expander roll 125 applies tension to the glass fiber fabric 50 before immersion, the second expander roll 129 provides tension to the glass fiber fabric 50 after immersion.

The glass fiber fabric 50 is opened in the third opening processing unit 106 and then goes through a drying process. By going through the drying process while tension is applied by the second expander roll 129, the glass fiber fabric ( 50) can be dried quickly and uniformly.

Although representative embodiments of the present invention have been described in detail above, those skilled in the art will understand that various modifications can be made to the above-described embodiments without departing from the scope of the present invention. . Therefore, the scope of the present invention should not be limited to the described embodiments, but should be determined by the claims and equivalents of the claims as well as the claims described later.

50: fiberglass fabric
100: Opening device for glass fiber fabric
102: First opening processing unit
104: Second opening processing unit
104-1, 104-2: A pair of compression rolls
106: Third opening processing unit
111: winding roll
113: 1st transfer roll
113-1: 1-1 transfer roll
113-2: 1-2 transfer roll
115: Spray
121: First water tank
123: Second water tank
125: 1st expander roll
127: 2nd transfer roll
127-1: 2-1 transfer roll
127-2: 2-2 transfer roll
129: 2nd expander roll
131: ultrasonic vibrator
133: bubble removal unit

Claims (12)

a first opening processing unit that performs a first opening treatment on the glass fiber fabric by spraying water;
a second opening processing unit that performs a second opening treatment using pressure on the first opening treated glass fiber fabric; and
A third opening processing unit that performs a third opening treatment using ultrasonic vibration on the second opening treated glass fiber fabric,
The first opening processing unit, the second opening processing unit, and the third opening processing unit sequentially perform opening in the direction of travel of the glass fiber fabric,
The third opening processing unit,
a first water tank containing liquid therein and in which the glass fiber fabric that has passed the second opening processing unit is immersed;
a second water tank containing liquid therein, provided below the first water tank, and provided so that the lower end of the first water tank is submerged;
One or more ultrasonic vibrators provided at the bottom of the second water tank and generating ultrasonic vibrations, and
A bubble removal unit provided in the second water tank and configured to discharge liquid toward the lower surface of the first water tank to remove bubbles generated by ultrasonic vibration on the lower surface of the first water tank,
The bubble removing unit discharges liquid toward the lower surface of the first water tank to remove bubbles generated by ultrasonic vibration on the lower surface of the first water tank.
In claim 1,
The first opening processing unit,
a first transfer roll for transferring the glass fiber fabric to the second carding processing unit; and
A carding device for glass fiber fabric, comprising at least one spray disposed on top of the glass fiber fabric transported by the first transfer roll and provided to spray a water stream on the surface of the glass fiber fabric.
In claim 2,
The spray is provided at an upper portion of the glass fiber fabric, spaced apart from each other along the width direction of the glass fiber fabric,
An opening device for glass fiber fabric, wherein the ranges of water streams sprayed from neighboring sprays among the plurality of sprays overlap each other.
In claim 2,
The first transfer roll includes a 1-1 transfer roll and a 1-2 transfer roll arranged to be spaced apart from each other,
At least one of the 1-1 transfer roll and the 1-2 transfer roll is provided to be height adjustable,
The first carding process is performed in a state where there is a height difference between the 1-1 transfer roll and the 1-2 transfer roll.
In claim 2,
The first transfer roll includes a 1-1 transfer roll and a 1-2 transfer roll arranged to be spaced apart from each other,
The 1-1 transfer roll and the 1-2 transfer roll are arranged at the same height,
The first opening process is performed in a state where the rotation speeds of the 1-1 transfer roll and the 1-2 transfer roll are different.
In claim 5,
The 1-2 transfer roll is disposed closer to the second carding processing unit than the 1-1 transfer roll,
The first opening process is performed in a state where the rotation speed of the 1-2 transfer roll is slower than the rotation speed of the 1-1 transfer roll.
In claim 2,
The second opening processing unit,
A pair of compressors disposed behind the spray in the transport direction of the glass fiber fabric, facing each other with the glass fiber fabric interposed therebetween, respectively pressing the glass fiber fabric on the upper and lower sides of the glass fiber fabric. A device for opening fiberglass fabric, comprising a roll.
delete delete In claim 1,
The bubble removal unit,
A carding device for glass fiber fabric that is provided in the form of a pipe so that the liquid can move inside, the end of the bubble removal part is provided to face the lower surface of the first water tank, and a screw is provided inside.
In claim 1,
The third opening processing unit,
a first expander roll that bends the transfer direction of the glass fiber fabric that has passed through the second opening processing unit downward to provide tension to the glass fiber fabric before being immersed in the first water tank;
a second transfer roll provided in the first water tank and including a 2-1 transfer roll disposed on one side of the first water tank and a 2-2 transfer roll disposed on the other side of the first water tank; and
A carding device for glass fiber fabric, further comprising a second expander roll that bends the transfer direction of the glass fiber fabric passing through the 2-2 transfer roll upward to apply tension to the glass fiber fabric after immersion.
In the first opening processing unit, performing a first opening treatment on the glass fiber fabric by spraying a water stream;
In a second opening processing unit, performing a second opening treatment using pressure on the first opening treated glass fiber fabric; and
In a third opening processing unit, performing a third opening treatment by ultrasonic vibration on the second opening treated glass fiber fabric,
performing the first card opening process, performing the second card opening process; And the step of performing the third opening process sequentially performs opening in the direction of travel of the glass fiber fabric,
The third opening processing unit,
a first water tank containing a liquid therein and in which the glass fiber fabric that has passed the second carding processing unit is immersed;
a second water tank containing liquid therein, provided below the first water tank, and provided so that the lower end of the first water tank is submerged;
One or more ultrasonic vibrators provided at the bottom of the second water tank and generating ultrasonic vibrations, and
A bubble removal unit provided in the second water tank and configured to discharge liquid toward the lower surface of the first water tank to remove bubbles generated by ultrasonic vibration on the lower surface of the first water tank,
The air bubble removal unit discharges liquid toward the lower surface of the first water tank to remove air bubbles generated by ultrasonic vibration on the lower surface of the first water tank.