KR101652002B1 - Apparatus And Method for Supply Sheet for Manufaturing Incombustible Fiberglass Reinforced Plastic Sheet - Google Patents

Abstract

The present invention relates to a sheet feeding apparatus and a sheet feeding method for manufacturing an incombustible fiberglass-reinforced plastic (FRP) sheet, in which an incombustible resin is impregnated with a reinforcing fiber sheet and fed to an apparatus for producing an incombustible fiberglass-reinforced plastic (FRP) sheet which produces the incombustible fiberglass-reinforced plastic (FRP) sheet in a prepreg state. The sheet feeding apparatus for manufacturing incombustible fiberglass-reinforced plastic sheets, according to the present invention, comprises: a sheet feeding unit on which a reinforcing fiber sheet is wound; a resin storage chamber disposed in the front of the sheet feeding unit and containing a liquid incombustible resin which the reinforcing fiber sheet, released from the sheet feeding unit, passes through and which impregnates the resin therein; a transport roller installed in the front of the resin storage chamber and rotatable on an axis horizontal to the ground, and over which the reinforcing fiber sheet impregnated with the incombustible resin is draped while passing through under tension; a first driving unit which rotates the transport roller; and an upper squeeze roller and a lower squeeze roller, which are installed side by side on a horizontal axis in the front of the transport roller and rotate by means of a second driving unit in the opposite direction to each other, wherein a portion of the incombustible resin impregnated in the reinforcing fiber sheet is squeezed out and released downwards as the reinforcing fiber sheet, having passed through the transport roller, passes between the upper squeeze roller and the lower squeeze roller.

Description

FIELD OF THE INVENTION [0001] The present invention relates to a sheet for manufacturing a non-combustible fiber reinforced plastic (FRP) sheet,

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for producing a nonflammable fiber-reinforced plastic sheet, and more particularly, to an apparatus for producing a nonflammable fiber-reinforced plastic (FRP) sheet for producing a non-combustible FRP sheet in a prepreg state, (FRP) sheet for impregnating and supplying a non-combustible fiber-reinforced plastic (FRP) sheet.

In general, the term "FRP (fiber reinforced plastics)" refers to fiber-reinforced plastics and is a plastic reinforced with mechanical strength, heat resistance, tensile strength and impact resistance by being compounded with reinforcing materials such as fibers, It is also called fiber reinforced resin (fiber reinforced resin) or reinforced plastic.

These FRPs are capable of forming at room temperature and normal pressure and are resistant to corrosion of acids, alkalis, salts, solvents, seawater, etc., and have excellent corrosion resistance. It is semi-permanent material which is lighter than aluminum and stronger than iron and has superior corrosion resistance, heat resistance and corrosion resistance, and has a very high strength. It is widely used in industrial industries in USA, Japan and Europe.

However, despite the fact that the above-mentioned FRP is widely used throughout the industry, research on the fire resistance performance in case of fire is relatively inadequate.

To solve this problem, a thermosetting resin containing a methylol group and an inorganic flame retardant are mixed in a Korean Patent No. 10-1049879, the mixture is dispersed by adding a solvent, and the mixture is diluted with purified water to prepare an aqueous resin solution. There is disclosed a method of producing an incombustible fiber-reinforced plastic by impregnating a resin aqueous solution with a flame-retardant fiber.

The non-combustible fiber-reinforced plastic manufacturing method of the above patent is produced by dissolving a thermosetting resin containing an methylol group and an inorganic flame retardant in water. Therefore, volatile organic solvents are not used and volatile organic contaminants are not discharged after molding, The flame retardancy is very good.

Incidentally, when a non-combustible resin mixed with a thermosetting resin and an inorganic flame retardant as described above is impregnated into a reinforcing fiber sheet such as glass fiber and heated and cooled while being conveyed in one direction to produce an incombustible FRP sheet, If the amount is not uniform, the incombustible FRP sheet can not be produced with a uniform thickness, and there is a high possibility that defects will occur.

Registration No. 10-0929842 (registered on November 26, 2009) Registration No. 10-0880805 (registered on Jan. 21, 2009)

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and it is an object of the present invention to provide a method for manufacturing a reinforcing fiber sheet, which comprises impregnating a reinforcing fiber sheet with a non- (FRP) sheet for use in a non-combustible fiber reinforced plastic (FRP) sheet.

According to an aspect of the present invention, there is provided a sheet feeding device for manufacturing a nonflammable fiber-reinforced plastic (FRP) sheet, the sheet feeding device comprising: a sheet supply part in which a reinforcing fiber sheet is wound; A resin reservoir disposed in front of the sheet supply unit and storing a liquid incombustible resin impregnated with the reinforcing fiber sheet released from the sheet supply unit; A conveying roller installed to rotate about a horizontal axis with respect to a ground surface in front of the resin reservoir and passing through the reinforcing fiber sheet impregnated with the incombustible resin in a stretched state; A first driving unit for rotating the conveying roller; And an upper squeeze roller and a lower squeeze roller arranged in parallel to each other around a horizontal axis in front of the conveying roller and rotated in opposite directions by a second driving unit, A part of the non-combustible resin impregnated into the reinforcing fiber sheet is squeezed and flows downward while passing between the squeeze roller and the lower squeeze roller.

According to the present invention, as the incombustible resin-impregnated reinforcing fiber sheet passes between the upper squeeze roller and the lower squeeze roller, the non-incombustible resin is squeezed so that the incombustible resin is impregnated with uniform thickness over the entire surface of the reinforced fiber sheet . Therefore, the thickness of the nonflammable FRP sheet can be made uniform.

BRIEF DESCRIPTION OF THE DRAWINGS Figure 1 is a side view of a sheet feeding device for producing a non-combustible fiber reinforced plastic (FRP) sheet according to an embodiment of the present invention.
Fig. 2 is a perspective view showing a main portion of the sheet feeding apparatus of Fig. 1;
Fig. 3 is a front view showing the conveying roller portion of the sheet feeding apparatus of Fig. 1;
Fig. 4 is a front view showing the upper squeeze roller and the lower squeeze roller of the sheet feeding apparatus of Fig. 1;

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of a sheet feeding apparatus and method for producing a nonflammable fiber-reinforced plastic (FRP) sheet according to the present invention will be described in detail with reference to the accompanying drawings.

In order to facilitate understanding of the present invention, the following description will be made on the assumption that the front and back of the sheet feeding apparatus are based on the advancing direction of the reinforcing fiber sheet in the structure of the sheet feeding apparatus.

1 to 4, a sheet feeding apparatus 100 for producing a nonflammable fiber-reinforced plastic (FRP) sheet according to an embodiment of the present invention includes a sheet feeding unit 110 in which a reinforcing fiber sheet S is wound, A transfer roller 130 installed to rotate about a horizontal axis with respect to the ground from above the front portion of the resin reservoir 120, And an upper squeeze roller 140 which rotates in opposite directions to each other by a second driving unit arranged parallel to a horizontal axis in front of the conveying roller 130. The upper squeeze roller 140 And a lower squeeze roller 150.

The sheet feeding part 110 is provided with a sheet shaft 111 on which a roll with the reinforcing fiber sheet S wound thereon is inserted. Therefore, when a force for pulling the reinforcing fiber sheet S from the outside is generated, the reinforcing fiber sheet S is released while the reinforcing fiber sheet roll rotates with respect to the sheet shaft 111 and is transported forward.

The resin reservoir 120 has a cylindrical shape with its top surface opened, and the liquid non-combustible resin (R) is stored therein. The reinforcing fiber sheet S unwound from the sheet supplying unit 110 is immersed in the incombustible resin R stored in the resin reservoir 120 and passes through the incombustible resin R, A non-combustible resin (R) is impregnated. A plurality of guide rollers 121 passing through the reinforcing fiber sheet S conveyed by the sheet feeding part 110 are installed at different heights inside the resin reservoir 120.

The lower end of the upper squeeze roller 140 and the lower squeeze roller 150 extend through the lower portion of the conveying roller 130 to the front end of the resin reservoir 120. The conveying roller 130 and the upper squeeze roller 140 And a resin recovery swash plate 122 for guiding the incombustible resin R falling from the lower squeeze roller 150 to the inside of the resin reservoir 120 are installed at an angle with respect to the ground surface.

The conveying roller 130 is made of a resin material such as urethane and is installed to rotate about a horizontal axis with respect to the ground on the upper side of the front side of the resin reservoir 120. In the resin reservoir 120, The reinforcing fiber sheet S impregnated with the reinforcing fiber R is fed forward while applying a predetermined tension. On the outer surface of the conveying roller 130, a groove 131 is formed in the form of a spiral wound in opposite axial directions from the intermediate portion as a starting point. The grooves 131 formed on the outer surface of the conveying roller 130 reduce the friction between the conveying roller 130 and the reinforcing fiber sheet S, And acts to eliminate the sheet conveying speed difference by the conveyor 210. [

If the grooves 131 of the conveying roller 130 are formed in a circular shape without being formed in a spiral shape, the conveying roller 130 may be idle with respect to the reinforcing fiber sheet S, A groove 131 is formed in a spiral shape in the same direction from one end to the other end of the conveying roller 130 and the reinforcing fiber sheet S tilts to one side of the conveying roller 130 So that they are formed in a spiral shape that is wound in opposite directions to each other in the axial direction with the intermediate point of the conveying roller 130 as a starting point.

The first driving unit for rotating the conveying roller 130 includes a driving motor 135 and a known driving device such as a belt 136 for transmitting the rotational force of the driving motor 135 to one end of the conveying roller 130 . ≪ / RTI >

The upper squeeze roller 140 and the lower squeeze roller 150 have a smaller diameter than the conveying roller 130 and are made of a resin material such as urethane as the conveying roller. The upper squeeze roller 140 and the lower squeeze roller 150 are disposed in parallel with the conveying roller 130 in front of the conveying roller 130 and convey the reinforcing fiber sheet S conveyed by the conveying roller 130, The non-combustible resin R is squeezed out of the reinforcing fiber sheet S to adjust the non-combustible resin R uniformly distributed over the entire surface of the reinforcing fiber sheet S.

The upper and lower squeeze rollers 140 and 150 have first and second resin discharge grooves 141 and 151 for forming a passage through which the incombustible resin R squeezed out of the reinforcing fiber sheet S flows down, Are formed along the circumferential direction. The second resin discharge groove 151 of the upper squeeze roller 140 and the lower squeeze roller 150 may be formed in a circular shape. In this case, the upper squeeze roller 140, the lower squeeze roller 150, The first resin discharge groove 141 of the upper squeeze roller 140 and the lower squeeze roller 141 of the upper squeeze roller 140 may be separated from each other due to a slip phenomenon occurring between the sheets S, The second resin discharge grooves 151 of the upper and lower squeeze rollers 150 and 150 are formed in a spiral shape in the opposite axial direction from the intermediate portion between the upper squeeze roller 140 and the lower squeeze roller 150 .

The first resin discharge groove 141 of the upper squeeze roller 140 and the second resin discharge groove 151 of the lower squeeze roller 150 are preferably formed so as to be wound in opposite directions to each other. The performance of squeezing the incombustible resin R in the reinforcing fiber sheet S passing between the lower squeeze roller 140 and the lower squeeze roller 150 can be further improved.

The width W2 of the second resin discharge groove 151 of the first resin discharge groove 141 of the upper squeeze roller 140 and the second resin discharge groove 151 of the lower squeeze roller 150 is 2 / 3 < / RTI >

The second driving unit for rotating the upper squeeze roller 140 and the lower squeeze roller 150 includes an upper motor 145 connected to one end of the upper squeeze roller 140 and a lower motor 145 connected to one end of the lower squeeze roller 150 And a lower motor 155 connected thereto. The upper motor 145 and the lower motor 155 control rotational speeds of the upper squeeze roller 140 and the lower squeeze roller 150 differently. More specifically, the rotation speed of the upper squeeze roller 140 by the upper motor 145 is controlled faster than the rotation speed of the lower squeeze roller 150 by the lower motor 155. This is because the upper squeeze roller 140 is placed on the upper side of the lower squeeze roller 150 and the upper squeeze roller 140 is wound around the lower squeeze roller 150 with the incombustible resin R of the reinforcing fiber sheet S, So that the squeezing performance of the upper squeeze roller 140 can be further improved by increasing the rotation speed of the upper squeeze roller 140. [

Since the reinforcing fiber sheet S may be used in a single sheet or two or more sheets may be used in a superimposed manner and the reinforcing fiber sheet S may have a different thickness, The upper squeeze roller 140 and the lower squeeze roller 150 may be vertically movable with respect to the squeeze roller 150 so that the height between the upper squeeze roller 140 and the lower squeeze roller 150 can be adjusted.

Meanwhile, when the reinforcing fiber sheet S is conveyed from the sheet supplying unit 110 to the resin reservoir 120, when the reinforcing fiber sheet S is excessively released from the sheet supplying unit 110 and the tension is weakened, So that the reinforcing fiber sheet S is no longer unwound from the sheet feeding part 110 automatically. A brake roller 160 is provided between the sheet supply unit 110 and the resin reservoir 120 so as to be rotatable around a horizontal axis and is provided with a reinforcing fiber sheet 160 transported from the sheet supply unit 110 to the resin reservoir 120, (Tension) applied to the brake roller 160 by the brake motor 161 that rotates the brake roller 160 in real time while allowing the brake S to be transported while being stretched by the brake roller 160 When the force applied to the brake roller 160 falls below a predetermined level, the brake roller 160 is stopped to temporarily stop the supply of the reinforcing fiber sheet S.

Next, a method of supplying the reinforcing fiber sheet S using the sheet feeding apparatus constructed as above will be described in detail.

The reinforcing fiber sheet S of the sheet feeding unit 110 is passed through the resin storage tank 120 and passed between the outer surface of the conveying roller 130 and the upper squeeze roller 140 and the lower squeeze roller 150, Is mounted on a sheet conveying conveyor (210) configured in the conveying unit (200) to continuously convey the reinforcing fiber sheet (S) from the rear to the front.

The reinforcing fiber sheet S released from the sheet supplying unit 110 passes through the resin storage tank 120 and is impregnated with the incombustible resin R and then passes through the conveying roller 130.

The reinforcing fiber sheet S having passed through the conveying roller 130 while passing over the outer surface of the conveying roller 130 passes between the upper squeeze roller 140 and the lower squeeze roller 150, The amount of the incombustible resin R is squeezed out and the amount of the incombustible resin R is uniformly adjusted.

At this time, the rotation speed of the upper squeeze roller 140 is controlled to be faster than the rotation speed of the lower squeeze roller 150 to smoothly squeeze the incombustible resin (R) impregnated into the reinforcing fiber sheet (S) have.

The reinforcing fiber sheet S having passed between the upper squeeze roller 140 and the lower squeeze roller 150 is conveyed to the dryer 200 disposed in front of the sheet feeding device, (210) and forward.

The reinforcing fiber sheet S having passed through the dryer 200 is cooled in a cooler in front of the dryer 200 and then made into a non-combustible FRP sheet in a prepreg state, and then is heated at a high temperature and a high pressure Pressed to produce the final incombustible FRP sheet product.

According to the present invention, the non-combustible resin-impregnated reinforcing fiber sheet S passes between the upper squeeze roller 140 and the lower squeeze roller 150, and the incombustible resin R is squeezed, The non-combustible resin (R) is impregnated with a uniform thickness over the entire surface. Therefore, the thickness of the nonflammable FRP sheet can be made uniform.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it will be understood by those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the present invention as defined by the appended claims. And it is to be understood that such modified embodiments belong to the scope of protection of the present invention defined by the appended claims.

R: Noncombustible resin S: Reinforced fiber sheet
100: sheet feeding device 110: sheet feeding part
111: sheet shaft 120: resin reservoir
121: guide roller 122: resin recovery swash plate
130: Feed roller 131: Home
140: upper squeeze roller 141: first resin discharge groove
150: lower squeeze roller 151: second resin discharge groove
160: Blake roller 161: Brake motor
200: dryer 210: sheet conveying conveyor

Claims (14)

A sheet feeding portion in which the reinforcing fiber sheet is wound;
A resin reservoir disposed in front of the sheet supply unit and storing a liquid incombustible resin impregnated with the reinforcing fiber sheet released from the sheet supply unit;
A conveying roller installed to rotate about a horizontal axis with respect to a ground surface in front of the resin reservoir and passing through the reinforcing fiber sheet impregnated with the incombustible resin in a stretched state;
A first driving unit for rotating the conveying roller;
An upper squeeze roller and a lower squeeze roller which are disposed in parallel to a horizontal axis in front of the conveying roller and rotate in opposite directions by a second driving unit;
The reinforcing fiber sheet having passed through the conveying roller passes through between the upper squeeze roller and the lower squeeze roller and a part of the incombustible resin impregnated into the reinforcing fiber sheet is squeezed and flows downward,
A first resin discharge groove and a second resin discharge groove are formed along the circumferential direction on the outer surfaces of the upper squeeze roller and the lower squeeze roller to form a passage through which the incombustible resin squeezed out from the reinforcing fiber sheet flows,
The first resin discharge groove of the upper squeeze roller and the second resin discharge groove of the lower squeeze roller are formed so as to be wound in a spiral shape opposite to each other in the axial direction from the intermediate portion between the upper squeeze roller and the lower squeeze roller (FRP) sheet. ≪ RTI ID = 0.0 > 11. < / RTI > delete delete The sheet feeding apparatus according to claim 1, wherein the first resin discharge groove of the upper squeeze roller and the second resin discharge groove of the lower squeeze roller are formed to be wound in opposite directions to each other. . 2. The non-combustible fiber-reinforced plastic according to claim 1, wherein the width of the first resin discharge groove of the upper squeeze roller and the second resin discharge groove of the lower squeeze roller is 2/3 of the width between the groove and the groove Sheet feeding device. The sheet feed device of claim 1, wherein the rotation speed of the upper squeeze roller is faster than the rotation speed of the lower squeeze roller. The non-combustible fiber-reinforced plastic material according to claim 1, wherein the upper squeeze roller is vertically movable with respect to the lower squeeze roller so that the height between the upper squeeze roller and the lower squeeze roller can be adjusted. FRP) sheets for sheet manufacture. The sheet feeding apparatus as claimed in claim 1, wherein a groove is formed on the outer surface of the conveying roller in the form of a spiral wound in a direction opposite to each other in the axial direction, . [2] The apparatus according to claim 1, further comprising: a brake roller installed between the sheet supply unit and the resin reservoir to be rotatable about a horizontal axis, the reinforcing fiber sheet being transported to the resin reservoir in the sheet supply unit;
Further comprising a brake motor for controlling the rotation of the brake roller in accordance with the tension of the reinforcing fibers passing through the brake roller. 2. The non-combustible fiber-reinforced plastic (FRP) sheet production sheet according to claim 1, wherein a plurality of guide rollers, which are passed through the reinforcing fiber sheet fed from the sheet feeding portion, Supply device. The apparatus according to claim 1, further comprising a non-combustible resin falling down from the conveying roller, the upper squeeze roller, and the lower squeeze roller to the lower end of the upper squeeze roller and the lower squeeze roller, And a resin recovery swash plate for guiding the inside of the resin storage tank to be inclined at an angle with respect to the ground surface. 11. A sheet feeding method using a sheet feeding apparatus for producing a nonflammable fiber-reinforced plastic (FRP) sheet according to any one of claims 1 and 4 to 11,
(a) passing the reinforcing fiber sheet of the sheet feeding portion through the resin reservoir to impregnate the reinforcing fiber sheet with the non-combustible resin;
(b) conveying the reinforcing fiber sheet impregnated with the incombustible resin through the conveying roller;
(c) passing the reinforcing fiber sheet having passed through the conveying roller between the upper squeeze roller and the lower squeeze roller to adjust the amount of the incombustible resin impregnated into the reinforcing fiber sheet;
(FRP) sheet. ≪ RTI ID = 0.0 > 8. < / RTI > 13. The method as claimed in claim 12, wherein in step (c), the rotation speed of the upper squeeze roller is higher than the rotation speed of the lower squeeze roller to squeeze the incombustible resin impregnated into the reinforcing fiber sheet to adjust the amount thereof. (FRP) sheets. [12] The method of claim 12, wherein in the step (a), the tension applied to the reinforcing fiber sheet during the feeding of the reinforcing fiber sheet of the sheet feeding unit to the resin reservoir is measured to stop the feeding of the reinforcing fiber from the sheet feeding unit to the resin storing tank (FRP) sheet for producing sheet for nonflammable fiber reinforced plastic (FRP) sheet.

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