KR100621687B1 - Reinforcement members for fiber reinforced plastic and device and method for producing the same - Google Patents

Abstract

The present invention relates to a reinforcing material for fiber-reinforced plastics, an apparatus for manufacturing the same, and a method for manufacturing the same. By using an unprocessed cotton fiber such as chopped strand mat or roving cloth as a reinforcing material for FRP, It can reduce the production cost, reduce the production cost and reduce the environmental pollution by using the shredded and crushed waste FRP generated in the process of producing the textile material, and can easily change the thickness of the reinforcement as needed. By making it possible, it is possible to increase the convenience of manufacturing the reinforcement for the intended use.

FRP, fiberglass

Description

Reinforcing material for fiber-reinforced plastics, apparatus for manufacturing same, and manufacturing method therefor {REINFORCEMENT MEMBERS FOR FIBER REINFORCED PLASTIC AND DEVICE AND METHOD FOR PRODUCING THE SAME}

1 is a partial perspective view for explaining a method for manufacturing a general fiber reinforced plastic.

Figure 2 is a partial perspective view showing a reinforcing material for fiber-reinforced plastics according to an embodiment of the present invention.

Figure 3 is a conceptual diagram schematically showing an apparatus for producing a fiber reinforced plastic according to an embodiment of the present invention.

Figure 4 is a flow chart showing a process for producing a fiber-reinforced plastic reinforcing material according to an embodiment of the present invention.

<Description of the symbols for the main parts of the drawings>

210: first roving cloth 230: fiber material

250: second roving cloth 270: seam

310: first roving cloth supply part 350: other surface part

360: first roving cloth supply unit 370: sewing machine

380: reinforcement

The present invention relates to a reinforcing material for a fiber reinforced plastic (FRP, hereinafter referred to as 'FRP'), a manufacturing apparatus and a manufacturing method thereof, and more specifically, to adjust the thickness of the reinforcing material for FRP, and Iii) and the FRP reinforcing material manufacturing apparatus and its manufacturing method, and the manufacturing method of FRP reinforcing material produced by the manufacturing method, by reducing the number of lamination of resin and reinforcing material and reducing the production cost of the reinforcing material by making it possible to recycle the waste FRP It is about.

The composition of the FRP is roughly divided into resins, reinforcements and additives. The resin not only has mechanical properties but also chemical properties, such as dispersing the force applied to the fiber material forming the reinforcing material and improving properties such as corrosion resistance and heat resistance. As the resin for FRP, both thermosetting resins such as unsaturated polyester, epoxy resin, phenol resin, polyimide, and thermoplastic resins such as polyamide, polycarbonate, ABS, PBT, PP, and SAN can be used. In particular, when producing a ship or water tank by FRP, unsaturated polyester is widely used, and is also used as a gel coat for the purpose of aesthetics and protection of the surface.

Additives are selected and added to the resin as necessary to facilitate the production of FRP, such as catalysts, curing agents, fillers, flame retardants, release agents, or the like to impart special properties to the FRP.

Currently, FRP reinforcing materials include inorganic fibers such as glass fibers, carbon fibers, and boron fibers, and organic fibers such as aramid fibers and polyester fibers. In particular, since glass fibers and carbon fibers are widely used, and the principle that the fiber material is used as a reinforcing material is almost the same, a description of a preferred embodiment of the present invention will be described with a representative case of using glass fiber.

FRP is applied to the surface of the reinforcing material, which is a fiber layer formed of a fiber material, by applying a molten resin with a roller or the like, so that the molten resin is sufficiently impregnated in the reinforcing material, and laminated the reinforcing material impregnated with the molten resin to the required thickness It manufactures by the method of hardening. In this case, a mold may be used so that the FRP is formed in a desired shape. An object having a complicated shape is formed by cutting and reinforcing the reinforcing material on the mold, and then repeating the impregnation of the molten resin in the reinforcing material as described above. It can be formed integrally.

The most widely used glass fiber for FRP reinforcement is the Chopped Strand Mat. The glass raw material is melted at a temperature of about 1600 ° C to make fibers, and 100 to 4000 pieces of fibers are combined together with dozens of strands without twisting strands collected using starch, etc., to obtain glass roving. After forming, the roving is cut into lengths of about 3 to 50 mm, dispersed in a random direction, and then bonded with a polyester-based binder to form sheet-shaped felt strand mat. Meanwhile, a roving cloth, which is a fabric manufactured by using the roving as a warp and weft yarn, is also widely used as a reinforcing material for FRP.

Felt strand mats and rovings are manufactured by processing glass fibers as described above, so processing costs are required. Particularly, when producing FRP using felt strand mat and roving, it is necessary to stack FRP by stacking it to a considerable thickness according to the use and specification of FRP. Therefore, the strand strand mat and roving are required for the production of FRP. Therefore, there is a problem that the cost of producing FRP also increases. In addition, since the parser waste generated during the production of felt strand mat and roving must be melted for recycling, there is a problem in that it takes a high cost for recycling.

In addition, waste FRP is currently incinerated because it is almost permanently degraded in nature. As described above, since synthetic resin is used in the FRP, dust and harmful gases are generated during the incineration of the waste FRP, which causes a problem of environmental pollution.

Therefore, an object of the present invention is to overcome the disadvantages of the prior art as described above, by reducing the production cost of FRP by increasing the thickness of the FRP that can be laminated at one time using cotton-shaped glass fibers as a reinforcing material of the FRP In order to reduce the production cost and reduce the environmental pollution, it is possible to reduce the production time, reduce the manufacturing time, and recycle the waste and waste FRP generated during the production of the textile material.

The present invention to achieve the above object, (a) dispersing the fiber material on one surface of the first roving cloth to form a fiber layer, (b) laminating a second roving cloth on the fiber layer, ( c) providing a reinforcing material for the FRP comprising a step of sewing at least one of the first roving cloth, the fibrous layer and the second roving cloth.

The method may further include mixing any one or more of the waste FRP that has been crushed or pulverized before the step (a).

The present invention includes a first roving cloth, a fiber layer formed on one surface of the first roving cloth, and a second roving cloth stacked on the fiber layer, in order to achieve the above object, wherein the first roving cloth, the fiber layer, and the first 2 Provide a reinforcing material for FRP in which at least one roving cloth is sewn.

The first roving cloth, the fibrous layer, and the second roving cloth may comprise any one or more of the group consisting of glass fibers, carbon fibers, boron fibers, aramid fibers, and polyester fibers, and the fibrous layer may be any of broken or ground waste FRP. It may include one or more.

In addition, the present invention, in order to achieve the above object, the first roving cloth supply portion, the other surface portion to form a fiber layer by dispersing the fiber material on one surface of the first roving cloth supplied from the first roving cloth supply portion, and the fiber layer It provides a reinforcing material manufacturing apparatus for FRP including a second roving cloth supply unit for laminating a second roving cloth, and a sewing apparatus for sewing a first roving cloth, a fiber layer, and a second roving cloth.

The other surface part includes a dispersion tank in which the fiber material is accommodated, a dispersion network formed on the bottom of the dispersion tank, a brush for dispersing and passing the fiber material through the dispersion network, and a driving device for operating the brush, and being installed to be opened and closed under the dispersion network. It is preferable to further include a throttle plate, the second roving cloth supply portion preferably further comprises a pressure roller for pressing the fiber layer.

The dispersion network may be detachably coupled to the dispersion tank, and the sewing apparatus may be installed to be movable in a direction perpendicular to the longitudinal direction of the first roving cloth, the fibrous layer, and the second roving cloth.

Hereinafter, with reference to the accompanying drawings will be described in detail for the reinforcing material for FRP, the manufacturing apparatus and the manufacturing method thereof according to the present invention.

1 is a partial perspective view for explaining a general manufacturing method of the FRP.

After applying molten resin (3) to mold (1) using rollers (7), the strand strand mat (5) was laminated, and the resin melted using roller (7) on the strand strand mat (5) again. (9) is applied so that the melt strand mat 5 is sufficiently impregnated with the molten resins 3 and 9. At this time, before the molten resin 3 is cured, the strand strand mat 5 may be stacked to impregnate the molten resin 3.

By repeating the lamination of the molten resins 3 and 9 and the chopped strand mat 5 as described above, an FRP having a desired thickness can be produced. However, when laminating a plurality of layers, the molten resin should be laminated before curing so that each layer can be integrated.

Depending on the shape of the FRP to be manufactured, a workbench (not shown) or a conveyor belt (not shown) may be used instead of the mold (1), and a roving cloth (not shown) instead of the felt strand mat (5) depending on the nature of the FRP to be manufactured. Can be used, and spray the molten resin (3, 9) to the felt strand mat (5) using a spray (not shown) instead of the roller (7) depending on the manufacturing process of the FRP and the product to be manufactured by FRP Can be. In addition, a release agent may be added to the molten resin 3 so that the molten resin 3 may be easily separated from the mold 1 after curing.

In order to manufacture the FRP of the desired thickness, it is necessary to repeat the operation described above. When using the strand strand mat 5 or the roving cloth (not shown) as a reinforcing material, since the thickness is thin, in order to manufacture a thick FRP The work must be repeated, which requires a lot of manpower and time.

In addition, in the production process of the strand strand mat 5 and the roving (not shown), a short-length glass fiber waste is generated, and the recycling cost is increased because it is necessary to melt the glass fiber again. In the case of recycling the yarns to manufacture the strand strand mat (5) and roving (not shown) again because the sand is generated, there is a need for a method that can recycle the yarn itself.

Figure 2 is a partial perspective view showing a reinforcing material for FRP according to an embodiment of the present invention. Referring to FIG. 2, the reinforcing material 200 includes a first roving cloth 210, a fiber layer 230, a second roving cloth 250, and a sewing line 270.

The reinforcing material 200 has a fibrous layer 230 interposed between the first roving cloth 210 and the second roving cloth 250, and the first roving cloth 210, the fibrous layer 230, and the sewing line 270. The second roving cloth 250 is integrally formed.

The fiber layer 230 may be used in the form of glass fiber that is not processed with chopped strand mat or roving cloth as it is, and may be used by mixing the crushed or ground waste FRP. However, when the amount of waste FRP that is broken and pulverized in the fiber layer 230 is excessively mixed with the glass fiber, the length of the glass fiber is shortened, so that the performance of the finished FRP (not shown) as a reinforcing material 200 is lowered. The ratio of the amount of broken and ground waste FRP to the amount of fiberglass should be controlled.

FRP reinforcement 200 having the structure as described above has the following characteristics.

Since the thickness of the reinforcement 200 can be adjusted by adjusting the thickness of the fibrous layer 230 interposed between the first roving cloth 210 and the second roving cloth 250, the FRP (not shown) is used. ) May reduce the number of operations of laminating the molten resin (not shown) and the reinforcing material (200).

In addition, the cotton-shaped glass fibers included in the fiber layer 230 is easily impregnated with molten synthetic resin, and the direction of the glass fibers are randomly arranged in the thickness direction as well as the width direction of the reinforcing material, felt strand mat and roving cloth As described above, the two-dimensional strength of the FRP is not mainly strengthened, but the strength in the thickness direction of the FRP is also enhanced.

The sewing line 270 fixes the fiber layer 230 in a process of transporting, storing, and manufacturing the FRP reinforcing material 200. As the sewing line 270, it is preferable to use a strand or roving, but it is also possible to use a thread used when sewing a conventional cloth.

3 is a conceptual diagram schematically showing an apparatus for manufacturing a reinforcing material for FRP according to an embodiment of the present invention, and FIG. 4 is a flowchart illustrating a process for manufacturing the reinforcing material for FRP according to an embodiment of the present invention. . This will be described with reference to FIGS. 3 and 4.

Referring to FIG. 3, the FRP reinforcing material manufacturing apparatus 300 includes a first roving cloth supply unit 310, a first roving cloth 311, the other surface unit 350, a second roving cloth supply unit 360, and a second roving. The cloth 361, the sewing device 370, and the rollers 321, 322, 323, and 324 are included.

The first roving cloth supply unit 310 supplies the first roving cloth 311 to the reinforcing material manufacturing apparatus 300 for FRP. Typically, a roving cloth is wound in a roll shape in the first roving cloth supply part 310, and the first roving cloth 311 is continuously provided by the feed rollers 321, 322, and 324. The conveying rollers 321, 322, and 324 may be replaced by means for stably conveying the first roving cloth 311 such as a conveyor belt (not shown).

The other surface portion 350 is installed on an upper portion of the first roving cloth 311 which is transferred by the transfer rollers 321, 322, and 324. The other surface part 350 includes a dispersion tank 351, a dispersion network 352, a driving device 355, a driving shaft 356, and a brush 358.

The dispersion tank 351 accommodates the fiber material 340 constituting the reinforcing material 380, and a dispersion net 352 is formed on the bottom thereof. The dispersion network 352 may be formed directly on the bottom of the dispersion tank 351 as a network structure in which a plurality of through holes are formed, but it is preferable that the dispersion network 352 is detachably installed in the dispersion tank 351. The dispersion network 351 is preferably formed to be similar to or slightly wider than the width of the first roving cloth 311.

A driving device 355 is installed above the distribution network 352, and a driving shaft 356 rotated by the driving device 355 is installed in the driving device 355. At least one dispersion blade 357 is installed at the lower end of the drive shaft 356, and the dispersion blade 357 is installed to maintain a predetermined distance from the distribution network 352. A brush 358 is installed at a portion of the dispersing blade 357 opposite to the dispersing network 352. When the driving shaft 356 is rotated by the driving device 355, the dispersing blade 357 is disposed inside the dispersing tank 351. Is rotated at In this case, the brush 358 has a length in contact with the upper surface of the dispersion network 352.

Therefore, when the dispersing blade 357 is rotated by the operation of the driving device 355, the fiber material 340 accommodated in the dispersing tank 351 is dispersed on the upper surface of the dispersing network 352 by the dispersing blade 357. The fiber layer 341 is formed on the upper part of the first roving cloth 311 that is transferred from the lower part of the other surface part 350 by passing through the dispersion network 352 by the brush 358 (S20 of FIG. 4). .

The lower portion of the distribution network 352 is provided with a control plate 330 that can open and close the distribution network 352. When the control plate 330 is closed, even if the dispersion blade 357 is rotated by the driving device 355, the fiber material 340 should be installed so as not to pass through the dispersion network 352. Opening and closing of the adjustment plate 330 can be automatically adjusted by the driving unit (not shown), it is also possible to open and close by hand.

On the other hand, the fiber material 340 is preferably using a cotton-shaped glass fiber, it is also possible to add the waste FRP crushed and crushed to the glass fiber as described above. When adding the broken and pulverized waste FRP to the dispersing tank 351, the glass fiber and the broken and pulverized waste FRP are uniformly mixed by closing the control plate 330 and rotating the dispersing blade 357 for a predetermined time. It is preferable to make it (S10 of FIG. 4).

On the other hand, the thickness of the fiber layer 341 is formed can be adjusted by the number and diameter of the through-holes formed in the dispersion network 352, the conveying speed of the first roving cloth 311 and the opening and closing degree of the control plate 330. The fiber layer 341 is formed thicker as the dispersion network 352 is replaced with a larger number of holes and a larger hole diameter. The slower the feeding speed of the first roving cloth 311 is, the thicker the fiber layer 341 is formed. As the throttle plate 330 is opened more, the fiber layer 341 is formed thicker. At this time, the number and diameter of the through-holes formed in the dispersion network 352 is preferably used according to the state of the glass fiber to be used and the broken and pulverized waste FRP, the thickness of the fiber layer 341 is the first roving cloth It is preferable to adjust using the transfer speed of the 311 and the opening and closing degree of the control plate 330. In this case, when the fiber layer 341 is formed thick, it is preferable to control the distance between the other surface portion 350 and the first roving cloth 311 so that the fiber layer 341 does not come into contact with the dispersion network 352. Do.

Therefore, since the thickness of the reinforcing material 380 can be easily adjusted by adjusting the thickness of the fiber layer 341, various reinforcing materials 380 may be manufactured according to a use.

A second roving cloth 361 is stacked on the fiber layer 341 formed to the required thickness by the other surface portion 350 (S30 of FIG. 4). The second roving cloth supply unit 360 continuously supplies the second roving cloth to the FRP reinforcing material manufacturing apparatus 300 like the above-described first roving cloth supply unit 310.

In order to prevent the fiber layer 341 from being dispersed and to have a somewhat elasticity, the second roving cloth 361 is preferably laminated with a slight pressure on the fiber layer 341. The second roving cloth 361 is laminated on the fiber layer 341 by the pressure roller 323, but when the fiber layer 341 is excessively pressurized, the thickness of the reinforcing material 380 is thin and impregnation of the molten resin. Since the amount or speed is lowered, it is necessary to consider the thickness of the reinforcement 380 required. Therefore, the pressure roller 323 is preferably installed so that the position in which the pressure roller 323 is fixed can be changed so as to adjust the degree of pressure.

After the first roving cloth 311, the fibrous layer 341, and the second roving cloth 361 are stacked, the fibrous layer 341 interposed between the first roving cloth 311 and the second roving cloth 361 is provided. Outwardly or moved between the first roving cloth 311 and the second roving cloth 361, the sewing machine 370 is sewn so as not to make the distribution of the fiber layer 341 uneven (S40 in FIG. 4). .

Thread (not shown) used in the sewing device 370, as described above, it is preferable to use a strand or roving, it is also possible to use a thread commonly used. The sewing apparatus 370 may determine the number in consideration of the width of the reinforcing material 380, and in particular, to install in consideration of the optimal sewing interval in which the fiber layer 341 is not moved in the process of using the reinforcing material 380. desirable.

The sewing by the sewing device 370 is preferably quilting, and other methods may be used, and one sewing device 370 is perpendicular to the conveying direction of the first roving cloth 311. It is also possible to sew in a zigzag shape by reciprocating in the direction.

Although the preferred embodiments of the present invention have been described above, those skilled in the art may variously modify and modify the present invention without departing from the spirit and scope of the present invention as set forth in the claims below. It will be appreciated that it can be changed. In particular, as a fiber material of the reinforcing material for FRP, a variety of materials such as carbon fiber, boron fiber, synthetic fiber can be used in addition to glass fiber.

According to the present invention described above, by using the cotton fiber glass not processed with chopped strand mat or roving cloth as the reinforcing material for FRP, it is possible to obtain the effect of improving the production rate of the reinforcement material and reduce the production cost, and to cut and crush By using the used waste FRP, the production cost can be reduced and environmental pollution can be reduced, and the thickness of the reinforcement can be easily changed as needed to manufacture the reinforcement suitable for the purpose of use. The effect that convenience is increased can be obtained.

Claims (11)

(a) dispersing a fiber material on one surface of the first roving cloth to form a fiber layer; (b) depositing a second roving cloth on the fibrous layer; (C) a method for producing a fiber-reinforced plastic reinforcement plastic comprising the step of sewing at least one of the first roving cloth, the fiber layer and the second roving cloth. The method of claim 1, The method of manufacturing a reinforcing material for fiber-reinforced plastic further comprising the step of mixing any one or more of the waste fiber-reinforced plastic that was cut or pulverized before the step (a). A first roving cloth; A fiber layer formed on one surface of the first roving cloth; A reinforcing material for a fiber-reinforced plastic comprising a second roving cloth stacked on the fiber layer, wherein the first roving cloth, the fiber layer, and the second roving cloth are sewn at least one place. The method of claim 3, The first roving cloth, the fiber layer and the second roving cloth is a fiber-reinforced plastic reinforcing material comprising any one or more of the group consisting of glass fibers, carbon fibers, boron fibers, aramid fibers, polyester fibers. The method of claim 3, The fiber layer is fiber reinforced plastic reinforcing material comprising any one or more of pulverized or pulverized waste fiber reinforced plastic. A first roving cloth supply unit; A second surface part which forms a fiber layer by dispersing a fiber material on one surface of the first roving cloth supplied from the first roving cloth supply part; A second roving cloth supply unit stacking a second roving cloth on the fiber layer; Reinforcing material manufacturing apparatus for fiber-reinforced plastic comprising a sewing device for sewing the first roving cloth, the fiber layer and the second roving cloth. The method of claim 6, The other surface portion, A dispersion tank in which the fiber material is accommodated; A dispersion network formed on the bottom of the dispersion tank; A brush for dispersing and passing the fiber material through the dispersion network; Reinforcing material manufacturing apparatus for fiber-reinforced plastics comprising a drive device for operating the brush. The method of claim 7, wherein Reinforcing material manufacturing apparatus for a fiber-reinforced plastic further comprising a control plate which is installed to be opened and closed at the lower portion of the dispersion network. The method of claim 6, The second roving cloth supply unit reinforcing material manufacturing apparatus for a fiber-reinforced plastic further comprising a pressure roller for pressing the fiber layer. The method of claim 6, The dispersion network is a reinforcing material manufacturing apparatus for fiber reinforced plastic detachably coupled to the dispersion tank. The method of claim 6, The sewing apparatus is a reinforcing material manufacturing apparatus for fiber-reinforced plastic which is installed to be movable in a direction perpendicular to the longitudinal direction of the first roving cloth, the fiber layer and the second roving cloth.

Images