KR101609209B1 - Alternative Manufacturing System Of Thermoset and Thermoplastic Prepreg - Google Patents

Abstract

The present invention relates to a system for manufacturing thermosetting and thermoplastic prepregs using one kind of carbon fiber tow and, in accordance with the present invention, a thermosetting prepreg and a thermoplastic prepreg can be selectively manufactured And the tow prepreg and the sheet prepreg can be manufactured depending on whether the tape winding device or the drum winding device is used. In addition, it is possible to easily manufacture various prepregs according to kinds of yarns and kinds of resin without greatly changing the system.

Description

TECHNICAL FIELD [0001] The present invention relates to a thermosetting and thermoplastic prepreg selective manufacturing system,

The present invention relates to a system for selectively producing thermosetting and thermoplastic prepregs, and more particularly, to a system for selectively producing thermosetting prepregs and thermoplastic prepregs by using a single type of carbon fiber and arranging the resin impregnation apparatuses.

In general, carbon fiber prepregs are impregnated with carbon fibers and used as materials for products made of composite materials such as aircraft, automobiles, and fishing rods. The prepreg is fixed to a product to be manufactured and then pressure and heat are applied to produce a composite material with curing, and a unidirectional prepreg is used to maintain the strength and rigidity of the composite material.

This prepreg is roughly divided into a thermosetting prepreg and a thermoplastic prepreg. In the conventional thermosetting prepreg manufacturing equipment, a plurality of carbon fiber tows are mounted on a krill to prepare prepregs having a width of 1 m, Legs are the basic prepreg specifications. The thermosetting prepreg manufacturing equipment can be divided into equipment for fabric prepreg and equipment for manufacturing unidirectional prepreg. The fabric prepreg is manufactured by passing a fabric wound on a paper tube through a resin impregnation tank and passing through a drying section having a height of 10 m, and then releasing a release film on the lower side and a release film on the upper side. In addition, a one-way prepreg is prepared by previously preparing a thermosetting resin film, then impregnating the resin by a laminating method through a roller for applying heat and pressure using the resin film, attaching a new release paper and release film to the impregnated and dried prepreg Rolled in roll form, and the length of the manufacturing equipment is about 30 m.

Thermoplastic prepregs include a method of laminating a resin film and a pulling method using an extruder. The thermoplastic resin generally includes polypropylene and polyethylene, and the high-temperature resin includes PA and PEEK. Such a thermoplastic resin is produced in the form of a film, and when the film is passed between the high-temperature and high-pressure rollers together with the carbon fiber, the resin is melted and impregnated with the carbon fiber. When thermoplastic resin chips are put into extruder and melted by high temperature and injected into a mold through which carbon fiber passes, carbon fiber and resin are impregnated in the mold. In this case, the mold is manufactured in the form of a mold for drawing, so that the carbon fiber impregnated in a narrow space in a wide space is pressurized, and the pressure-receiving resin and carbon fiber are improved in impregnation property and a uniform thermoplastic prepreg Can be produced.

However, the apparatuses for producing thermosetting prepregs and thermoplastic prepregs are similar in basic equipment configuration, and include a part for supplying yarn, a part for arranging yarn, a part for impregnating resin, a part for winding prepreg, But it has a problem that the method of impregnating the resin and the characteristics thereof are different and it is not possible to produce it in one piece of equipment. The thermosetting resin is worked at a temperature of 80 DEG C or lower, and in many cases, the resin is in a liquid phase, and there is a impregnation tank for impregnating the resin. However, thermoplastic resins are often used at temperatures above 200 ° C. Most of the resins are in the form of chips, and there must be a device to dissolve the resin. Therefore, separate equipment is required to manufacture the two prepregs.

Although not technically a problem, from the economical point of view, a thermosetting prepreg manufacturing apparatus uses a plurality of carbon fiber tows to produce a prepreg having a width of 1 m, and a prepreg having a width of 1 m is a basic prepreg specification. If the width of the carbon fiber tow is 10 mm, a minimum of 100 carbon fiber bobbins are required, 5 kg of carbon fiber is wound around each bobbin, the price is 40,000 Won / kg, and the minimum There is a cost of purchasing materials of 20 million won or more. Also, the resin used for preparing prepregs must be purchased in large quantities, and there is a problem that a great deal of cost is incurred in developing and testing new prepregs.

In addition, the equipment for manufacturing the prepreg is expensive equipment having a minimum length of 30 m and its price is over 3 billion KRW. In order to prepare thermosetting and thermoplastic prepreg, each of the thermosetting prepreg equipment and the thermoplastic prepreg equipment must be equipped. To stop production operations and to develop and test new prepregs.

Korean Patent Publication No. 1996-017575 discloses a method for producing a phenolic resin short carbon fiber prepreg having a thin film, a light weight and a shielding property against electromagnetic waves and excellent flame retardancy by employing a dry kneading method of a short carbon fiber and a phenolic resin, As a kind of thermosetting resin, there is a problem that prepreg using a thermoplastic resin can not be manufactured by the method described in this patent.

SUMMARY OF THE INVENTION Accordingly, the present invention has been made keeping in mind the above problems occurring in the prior art, and it is an object of the present invention to provide a yarn feeding device and a winding device which are capable of manufacturing a prepreg while using a single carbon fiber toe bobbin, The present invention provides a thermosetting and thermoplastic prepreg selective manufacturing system capable of reducing the manufacturing cost by manufacturing a prepreg suitable for use by using a resin impregnating apparatus which is commonly used and has different characteristics and uses, As a technical task.

Therefore, according to the present invention, there is provided a high-temperature electric furnace which passes a bundle of carbon fiber monofilaments to remove an epoxy-based sizing agent contained in carbon fibers with high heat and a high- A high thermal desizing device, a convex roller and a concave roller alternately arranged, passing a bundle of carbon fiber staple fibers over the rollers, spreading a bundle of carbon fiber staple fibers while passing through the convex roller, A spreading device for widening the width of the carbon fiber staple fiber bundle by repeating the step of collecting the bundle several times, a resin impregnating device for impregnating the carbon fiber staple fiber bundle with a thermosetting resin or a thermoplastic resin, and a winding device A thermosetting and thermoplastic prepreg selective manufacturing system is provided.

In addition, the resin impregnating apparatus of the thermosetting and thermoplastic prepreg selective preparation system of the present invention is characterized in that the resin impregnating apparatus includes a resin injecting apparatus for supplying a predetermined amount of thermosetting resin to the resin impregnation tank, a transferring apparatus, a knife method for squeezing a certain amount of thermosetting resin into carbon fibers The resin-impregnating apparatus comprising:

The resin impregnating apparatus of the thermosetting and thermoplastic prepreg selective preparation system of the present invention rotates while contacting with a thermoplastic resin contained in the resin impregnation tank and a resin impregnation tank containing a molten thermoplastic resin, The resin impregnating apparatus comprising a impregnating roller for applying a resin to the impregnating roller, a resin amount adjusting knife for adjusting a resin impregnation amount while being in line contact with the impregnating roller, and a transferring device.

In addition, the resin impregnating apparatus of the thermosetting and thermoplastic prepreg selective manufacturing system of the present invention comprises an extruder for melting a thermoplastic resin and injecting a certain amount of a thermoplastic resin into a drawing die, Wherein the extruder-type resin impregnating apparatus includes an extruder-type resin impregnating apparatus including a draw-out mold and a conveying device, the internal structure of which is formed so that a diameter of a section through which a carbon fiber single-

In addition, the winding apparatus of the thermosetting and thermoplastic prepreg selective manufacturing system of the present invention may further comprise a press-wound winding roller for pulling the tow prepreg produced at a constant speed, a guide roller, a tape-type winder for winding the tow prepreg, A tension adjusting device of an electronic clutch type for reducing the rpm according to the winding weight so that the linear velocity increases as the outer diameter of the prepreg increases, And is a winding device.

Further, the winding device of the thermosetting and thermoplastic prepreg selective manufacturing system of the present invention is a drum type winding device which is wound around the outer periphery of the drum while moving the tow prepreg conveyed from the resin impregnating device at a constant speed to form a sheet type prepreg .

Therefore, according to the present invention, it is possible to selectively produce a thermosetting prepreg and a thermoplastic prepreg according to the arrangement of the resin impregnating device using one carbon fiber tow. The thermoplastic prepreg and the thermoplastic prepreg can be selectively manufactured according to the use of the tape winding device or the drum winding device. A prepreg can be produced. In addition, there is an effect that it is possible to easily manufacture various prepregs according to kinds of yarns and kinds of resin without a large change of the system.

FIG. 1 is a view showing the entire construction of a system for selectively manufacturing a thermosetting and thermoplastic prepreg according to the present invention,
2 is a schematic view of a mechanical spreading apparatus according to the present invention,
3 is a schematic view of a thermosetting prepreg resin impregnation apparatus according to the present invention,
4 is a schematic view of a roller type thermoplastic prepreg resin impregnating apparatus according to the present invention,
5 is a schematic view of a resin-impregnated thermoplastic prepreg resin impregnating apparatus according to the present invention,
6 is a schematic view of a tape winding system according to the present invention,
7 is a schematic view of a drum winding system according to the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will now be described in detail with reference to the drawings.

The present invention relates to a system for manufacturing thermosetting and thermoplastic prepregs using one kind of carbon fiber tow and includes a high thermal dissipating device 2 having a high-temperature electric furnace and a nitrogen circulating supply device as shown in FIG. 1, A spreading device 3, a resin impregnating device 4 and a winding device 5.

The high heat dissipating device 2 of FIG. 1 comprises a high-temperature electric furnace which passes the carbon fiber single-strand fiber bundle 1 to remove the epoxy-based sizing agent contained in the carbon fiber with high heat, And has a nitrogen circulation supply device for the purpose. A carbon fiber monofilament bundle (1) passing through a high-temperature electric furnace (2) is heated in an electric furnace (2) having a high temperature of 400 DEG C or more to remove an epoxy-based sizing agent contained in the carbon fiber monofilament bundle The dislocated carbon fiber single-stranded fiber bundle (1) has a disadvantage in that it is clogged with little external force and is difficult to handle. Therefore, in the present invention, a carbon fiber bundle Extend the width so that resin impregnation can be done with minimum external force.

As shown in FIG. 2, the spreading device 3 passes a bundle of carbon fiber staple fibers onto rollers arranged alternately with a convex roller and a concave roller. The bundle of carbon fiber staple fibers is stretched while passing through the convex roller, The step of collecting the carbon fiber staple fiber bundles while passing the rollers is repeated several times to widen the width of the carbon fiber staple fiber bundles.

The carbon fiber staple fiber bundle supplied to the spreading device 3 is passed through the convex roller 31 of the spreading device 3 and the bundle of carbon fiber staple fibers is stretched while passing through the concave roller 32, Bundles are gathered. Thus, when the carbon fiber staple fiber bundle passes through the convex roller and the concave roller several times, the width of the carbon fiber staple fiber bundle is uniformly widened.

At this time, the degree of spreading of the carbon fiber staple fiber bundle is determined according to the number of the arranged convex rollers 31 and the concave rollers 32. By adjusting the position of the rollers using the roller position guide 33, 31 and the concave roller 32 by controlling the tension of the carbon fiber staple fiber bundle.

The spread carbon fiber short fiber bundle is supplied to the resin impregnation device 4 and impregnated with a thermosetting resin or a thermoplastic resin. The resin impregnating apparatus of the present invention may be provided with an apparatus for impregnating a thermosetting resin and an apparatus for impregnating a thermoplastic resin, and a resin impregnating apparatus may be selected according to the type of the prepreg to be produced.

 As shown in Fig. 3, the resin impregnating apparatus for impregnating a thermosetting resin includes a resin injecting device 43 for supplying a predetermined amount of thermosetting resin to the resin impregnation tank 41, a transfer device 42, a certain amount of thermosetting resin A knife-type resin impregnating device is provided including a knife-type resin amount adjusting device (44) for squeezing carbon fibers.

The thermosetting resin impregnating apparatus 4 continuously injects a predetermined amount of resin into the resin impregnation tank 41 using the resin injector 43 as shown in Fig. 3, In order to control the content of the resin impregnated in the short fiber bundle 1, the resin content can be controlled by controlling the height of the resin content adjusting device 44 of the knife structure so that a certain resin can be impregnated. In the case of a thermosetting resin, an epoxy resin can be used. In order to improve the viscosity and impregnation property of the resin, an epoxy resin is dissolved by using a solvent. After the preparation of the prepreg, the solvent is passed through a hot air dryer to volatilize the solvent.

4, the resin impregnating apparatus for impregnating a thermoplastic resin comprises a resin impregnation tank 54 for containing a molten thermoplastic resin, a resin impregnation tank 54 for rotating the carbon fiber staple fiber bundle 54 in contact with the thermoplastic resin contained in the resin impregnation tank, A roller type resin impregnation device including an impregnation roller 55 for applying a thermoplastic resin to the impregnation roller, a resin amount adjusting knife 56 for adjusting the resin impregnation amount while making line contact with the impregnation roller, and a transfer device 53 can be used .

As shown in FIG. 4, the resin impregnating apparatus has a resin impregnation tank 54 having a high-temperature heating apparatus 52 and a resin stirring apparatus 51, and melts a solid thermoplastic resin chip. The resin is moved to the upper portion of the roller through which the carbon fiber staple fiber bundle 1 passes by the rotating impregnating roller 55 and the resin of a certain amount and a certain thickness is stuck to the carbon fiber staple fiber bundle 1).

As shown in FIG. 5, the resin impregnating apparatus for impregnating a thermoplastic resin comprises an extruder 61 for melting a thermoplastic resin and injecting a predetermined amount of a thermoplastic resin into a drawing die, And an extruder-type resin impregnating device including a draw-out mold 62 and a conveying device 63 formed so that the diameter of a section through which the internal structure is discharged is shorter than a section through which the carbon fiber staple fiber bundle is fed can be used .

The resin impregnating device injects a predetermined amount of resin into the draw-out mold 62 by using an extruder capable of melting and dispensing a predetermined amount of the thermoplastic resin chip 61. The resin injected into the draw- Is impregnated into the carbon fiber staple fiber bundle (1) passing through the inside of the carbon fiber bundle (62). The shape of the drawing metal mold 62 is formed such that the diameter of a section through which the carbon fiber monofilament bundle is supplied is narrower than that of the carbon fiber monofilament bundle, So that impregnation with the carbon fiber staple fiber bundles of the pressured resin is improved, so that a uniform thermoplastic prepreg can be produced. In this case, when thermoplastic is cooled, the bonding force between them disappears and it is difficult to fix the sheet shape. Therefore, when the sheet is wound on the drum, it is required to be pressed with a heat roller so as to continuously apply heat.

In this manner, prepregs impregnated with resin are produced in the form of a tape prepreg using a tape-type winding device, or prepregs in the form of a sheet are produced using a drum-type winding device. In the case of thermoplastic prepregs, the bonding force between them is lost when they are cooled, and the sheet form is hard to be fixed. Therefore, the thermoplastic prepregs are squeezed with a heat roller so that heat can be continuously applied when the sheet is wound on the drum.

The tape-type winding device includes a press-wound winding roller 71 for pulling the tow prepreg produced at a constant speed, a guide roller 73, a tape-type winder 72 for winding up the tow prepreg, And a tension adjusting device 74 of an electronic clutch type for reducing the rpm according to the winding weight so that the linear velocity increases as the outer diameter of the winding roll increases.

As the outer diameter of the tow prepreg wound on the tape type winder 72 is increased, the tape type winding device pulls up the tow prepreg produced at a constant speed through the compression type winding roller 71, Type winding roller 71. Thus, the tension adjusting device 74 of the electromagnetic clutch type is formed so as to be able to adjust the winding speed to be constant, so that the winding-up weight To adjust the rpm to decrease.

Further, the drum type winding device is characterized in that the tow prepreg conveyed from the resin impregnating device is wound around the outer periphery of the drum while moving left and right at a constant speed, thereby forming a sheet type prepreg.

In the case of the drum type winding device, when the tow prepreg conveyed from the resin impregnating device is fed to the outer periphery of the drum at a constant angle (5 degrees or less) while moving left and right at a constant speed, prepregs are formed on the drum- After winding and cutting in the vertical direction, a sheet-form prepreg is produced. This operation can be controlled by the drum winding device controller 81 as shown in Fig. 7. When the operation of winding the prepreg on the drum 82 is completed, the drum driving motor 83 is stopped and the drum 82 And the clutch 84 connecting the drum drive motor 83 are separated.

The thermosetting and thermoplastic prepreg selective manufacturing system of the present invention can be configured such that each of the devices described above is constituted by individual frames and each frame can be easily moved according to the required method and material to form a thermosetting or thermoplastic carbon fiber prepreg manufacturing system It is easy to prepare the prepreg.

Examples of the arrangement include a high thermal desizing device, a spreading device, a thermosetting resin impregnating device, a tape retracting device or a high thermal desizing device, a spreading device, a thermosetting resin impregnating device, a drum type retracting device or a high thermal desizing device Spreading device → Roller type resin impregnating device → Tape winding device or high thermal desizing device → Spreading device → Roller type resin impregnating device → Drum type winding device or high thermal desizing device → Spreading device → Extruder type resin impregnation Apparatus, a tape-type winding apparatus or a high-temperature desizing apparatus, a spreading apparatus, an extruder-type resin impregnating apparatus, a drum type winding apparatus, or the like to produce various thermosetting or thermoplastic carbon fiber prepregs. Fiber prepreg selective manufacturing system The prepreg can be easily manufactured.

1: carbon fiber 2: high thermal desizing device
3: spreading device 4: resin impregnating device
5: winding device
31: convex roller 32: concave roller
33: roller position guide 41: resin impregnation tank
42: Feeding device 43: Resin feeding device
44: Resin content adjusting device 51: Resin stirring device
52: Heating device 53: Feeding device
54: resin impregnation tank 55: impregnated roller
56: resin amount adjusting knife 61: thermoplastic resin chip
62: Drawing mold 63: Feeding device
64: Extruder 71: Compression type take-up roller
72: tape type winder 73: guide roller
74: tension adjusting device 81: drum winding device controller
82: Drum 83: Drum drive motor
84: clutch

Claims (6)

A high-temperature electric furnace for passing epoxy fiber-based sizing agents contained in carbon fibers through a carbon fiber single-stranded bundle to remove the high-temperature sizing agent, and a high thermal desizing device having a nitrogen circulating supply device for preventing oxidation of carbon fibers at high temperatures,
A step of arranging the convex rollers and the concave rollers alternately and passing the bundle of carbon fiber staple fibers over the rollers to spread the bundle of carbon fiber staple fibers while passing the convex rollers and collecting the carbon fiber staple bundles while passing through the concave rollers A spreading device that repeats several times to widen the width of the carbon fiber staple bundle,
A resin impregnating device for impregnating the carbon fiber staple fiber bundle with a thermosetting resin or a thermoplastic resin, and
And a winding device. ≪ RTI ID = 0.0 > 11. < / RTI > The method according to claim 1,
The resin impregnating apparatus is a knife-type resin impregnating apparatus including a resin injecting apparatus for supplying a predetermined amount of a thermosetting resin to a resin impregnation tank, a transferring apparatus, and a knife-type resin amount adjusting apparatus for squashing a certain amount of thermosetting resin to carbon fibers ≪ / RTI > wherein the thermoplastic and prepreg selective preparation system comprises a thermosetting prepreg. The method according to claim 1,
The resin impregnating apparatus comprises a resin impregnating tank for containing a molten thermoplastic resin,
An impregnating roller rotating in contact with the thermoplastic resin contained in the resin impregnation tank to apply the thermoplastic resin to the carbon fiber staple fiber bundle,
And a roller-type resin impregnating device including a resin amount adjusting knife (56) for adjusting a resin impregnation amount while being in line contact with the impregnation roller and a transfer device (53). The method according to claim 1,
The resin impregnating apparatus includes an extruder for melting a thermoplastic resin and injecting a predetermined amount of a thermoplastic resin into a drawing die,
The extruder-type resin impregnating apparatus according to any one of claims 1 to 3, wherein the extruder-type resin impregnating apparatus comprises a drawing die and a conveying device formed so that the carbon fiber monofilament bundle passes through the inside thereof and the diameter of a section through which the carbon fiber monofilament bundle is supplied is narrower than an interval ≪ / RTI > wherein the thermoplastic and prepreg selective preparation system comprises a thermosetting prepreg. The method according to claim 1,
The winding device includes a press-wound winding roller for pulling a tow prepreg produced at a constant speed, a guide roller, a tape-type winder for winding up the tow prepreg, and a linear velocity increasing as the outer diameter of the wind- And a tensioning device of an electronic clutch type for reducing the rpm according to the winding weight so as to be able to be wound at a constant tension. The tape winding device according to claim 1, system. The method according to claim 1,
Wherein the winding device is a drum type winding device for winding the tow prepreg conveyed from the resin impregnating device around the drum while moving left and right at a constant speed to make a sheet type prepreg.

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