KR102188243B1 - Device and method for molding composite materials using VARTM - Google Patents

Abstract

The present invention relates to an apparatus and method for quick and simple molding of a composite material using VARTM.
That is, in the present invention, the composite material to be impregnated with resin is embedded in the vacuum film bag, and a pair of jigs are mounted on both sides of the vacuum film bag so as to be airtight, and vacuum is applied to the inside of the vacuum film bag through one jig. At the same time, the resin is supplied through a jig on the other side, so that the resin easily penetrates into the composite material by the vacuum suction force, so that the inside of the vacuum film bag can always be kept in a vacuum state. It is intended to provide an apparatus and method for rapid and simple molding of composite materials using VARTM that enables accurate molding and production.

Description

Device and method for molding composite materials using VARTM

The present invention relates to a quick and simple molding method of a composite material using VARTM and an input/output jig device thereof, and more particularly, to create a vacuum inside the sealed state so as to be airtight for the production of a composite material, and vacuum suction force The present invention relates to an apparatus and method for quick and simple molding of a composite material using VARTM in which the resin easily permeates the fiber, which is a reinforcing material.

Polymer composites can achieve high strength with minimal weight, so they can be lightweight, have high flexibility in product design, and reduce the number of parts, thereby improving productivity through integrated parts, good dimensional stability, and fatigue life. It is long and has excellent advantages in corrosion resistance and electrical insulation, so it is used in all industrial fields such as aerospace, transportation equipment, sports and leisure, and its application field is gradually expanding.

In particular, recently, in the field of composite materials, vacuum assisted resin transfer molding (VARTM), seaman composite resin infusion manufacture (SCRIMP), resin infusion under flexible (RIFT) in order to replace the autoclave process, which is an existing high cost and low productivity process. Research on resin filling molding processes such as tolling) has been widely conducted, and based on the results, the application to real parts is in the trend of spreading.

The resin-filled molding process technique makes it possible to manufacture an integrated structure that combines several parts, and the fiber composite material has superior specific strength characteristics compared to the metal material, so that the aircraft weight can be drastically reduced. It provides the advantage of minimizing processing.

The composite material is composed of two or more materials or structures, and refers to a material that exhibits overall superior mechanical properties rather than the properties of each material.These composite materials are based on the type and arrangement direction of the reinforcing material (mainly fibrous). Since it has anisotropy, which is influenced by mechanical properties, it has a variety of designs compared to isotropic materials such as metallic materials, and can exhibit excellent mechanical properties according to appropriate fiber orientation and lamination.In addition, composite materials have the effect of reducing the weight of parts. It has advantages in many other aspects such as long fatigue life, excellent vibration damping characteristics, electrical characteristics, and environmental characteristics.

In particular, the fiber-reinforced composite material, one of the composite materials, is molded and manufactured in a form in which a reinforcing material and a matrix material are combined using a vacuum assisted resin transfer molding (VARTM) method. A fiber-reinforced composite material using an epoxy resin, which is one of the thermosetting resins, is molded and manufactured as a matrix material.

Here, a conventional composite material molding apparatus and method using the VARTM method will be described as follows.

1 and 2 are a cross-sectional view showing a conventional polymer composite material vacuum forming apparatus and method, and FIG. 3 is an enlarged view of a main part viewed from a direction'Z' of FIG. 1.

First, dry fibers or preforms are placed on a one-sided mold 20 as a reinforcing material 10 constituting a composite material.

Subsequently, on the reinforcing material 10, a flow aid 11 and a release film 12 in the form of a flow media in which the resin is uniformly and smoothly distributed and supplied throughout the reinforcing material are laid, and finally, the reinforcing material In order to keep the airtightness of (10), the vacuum film 13 is covered over the mold 20 on one side.

In more detail, by attaching a sealing tape 14 between the four-sided edge ends of the vacuum film 13 and the mold 20 on one side, the inside of the vacuum film 13 is made airtight.

Next, a vacuum providing hose 16 connected to the vacuum pump 15 is inserted into the vacuum film 13 at one side of the vacuum film 13, and the resin is stored on the other side of the vacuum film 13 The resin supply hose 18 connected to the resin supply tank 17 is inserted into the vacuum film 13.

At this time, to prevent air from permeating into the vacuum film 13 between the outer diameter portion of the vacuum supply hose 16 and the vacuum film 13, and between the outer diameter portion of the resin supply hose 18 and the vacuum film 13 Sealing tape 14 is attached.

In this state, when the vacuum pump 15 is driven, air in the vacuum film 13 is sucked into a vacuum state, and when resin from the resin supply tank 17 is subsequently injected into the resin supply hose 18, the vacuum film The resin is impregnated into the reinforcing material 10 such as dry fibers or preforms due to the vacuum pressure (negative pressure) acting within the (15).

In this way, the resin is impregnated into the reinforcing material 10 and the combined polymer composite material is molded, and the final polymer composite material is completed through a process of curing the molded polymer composite material in an oven.

However, the conventional apparatus and method for molding a polymer composite material has the following problems.

First, there is a problem in that the inside of the vacuum film cannot maintain a vacuum state.

That is, referring to the attached FIG. 3, the sealing tape 14 attached to the vacuum providing hose 16 has poor adhesive strength, or in particular, when there is even a small gap between the vacuum film 13 and the sealing tape 14, vacuum Air penetrates into the film 13, and as a result, the vacuum state in the vacuum film cannot be maintained, making it impossible to vacuum-form the polymer composite material, or to significantly degrade the vacuum-forming quality.

Second, there is a problem that increases the consumption amount of the sealing tape and increases the cost accordingly, as an expensive sealing tape is used in every molding process.

The present invention was conceived to solve the conventional problems as described above, in which a composite material to be impregnated with resin is embedded in a vacuum film bag in the shape of a plastic bag, and a pair of jigs can be kept airtight on both sides of the vacuum film bag. In the installed state, vacuum is provided inside the vacuum film bag through one jig, and the resin is supplied through the other jig so that the resin easily penetrates into the composite material by the vacuum suction force, so that the inside of the vacuum film bag is always It is an object of the present invention to provide an apparatus and method for rapid and simple molding of a composite material using VARTM, which can be maintained in a vacuum state, and accordingly, a polymer composite material can be molded and manufactured quickly and accurately.

One embodiment of the present invention in order to achieve the above object is: a vacuum film bag in which the reinforcing material of the target resin impregnation is embedded; A jig for providing a vacuum mounted so as to be airtight on one side of the vacuum film bag; A resin supply jig mounted so as to be airtight on the other side of the vacuum film bag; A vacuum providing hose, one end coupled to the vacuum providing jig and the other end coupled to a vacuum pump to provide vacuum inside the vacuum film bag; And a resin supply hose having one end coupled to the resin supply jig and the other end connected to the resin supply tank so that resin for impregnation is supplied to the reinforcing material by the vacuum suction force supplied from the vacuum supply hose. It provides a quick and simple molding apparatus for a composite material using VARTM, characterized in that it is configured to include.

The vacuum film bag is provided in a structure in which the four edges of the upper vacuum film and the lower vacuum film are mutually bonded to each other, so that the inside is sealed, and a jig for providing a vacuum and a jig for supplying resin are respectively connected to one side and the other side of the upper vacuum film. It is characterized in that it is provided in a structure in which a fastening hole is formed.

Preferably, the upper vacuum film and the lower vacuum film are characterized in that a reinforcing material to be impregnated with a resin is embedded, and in a state in which a jig for providing a vacuum and a jig for supplying a resin are combined, the four edges are bonded by a heat-sealing method. .

In particular, the vacuum providing jig and the resin supplying jig include: a supporting block embedded in the vacuum film bag is formed at the lower portion, and a fastening block protruding to the outside through the upper vacuum film of the vacuum film bag is integrally formed at the lower portion thereof. , A fixing jig formed through a fluid passage hole in the center; A sealing member seated on the support block and in close contact with the inner surface of the upper vacuum film; A movable jig fastened to a fastening block protruding from the upper vacuum film and in close contact with the sealing member and the upper vacuum film; It characterized in that it consists of.

In addition, a male screw is formed on a peripheral surface of the fastening block of the fixing jig, and a female screw is formed on an inner diameter portion of the movable jig.

In addition, on the fastening block of the fixing jig, a hollow hose fastening end coinciding with the fluid passage hole is further integrally formed for the hose press-fitting.

In addition, a plurality of resin guide grooves intersecting each other for guiding the resin to spread in all directions are formed on the bottom of the support block of the fixing jig, and for interfacial separation with the resin over the bottom surface of the support block including the resin guide groove. It is characterized in that the Teflon coating layer is formed.

In addition, at least two steps cut at right angles to rotate the movable jig are further formed on the upper surface of the movable jig.

Another embodiment of the present invention in order to achieve the above object is: providing a vacuum film bag made of an upper vacuum film and a lower vacuum film that can be bonded to each other; Providing a vacuum providing jig for providing a vacuum inside the vacuum film bag and a resin supplying jig for supplying a resin; Fastening a jig for providing a vacuum to one side of the vacuum film bag so as to be airtight and at the same time fastening a jig for supplying a resin to the other side of the vacuum film bag so as to be airtight; Inserting a reinforcing material to be impregnated with a resin inside the vacuum film bag, and then bonding the upper vacuum film and the lower vacuum film to each other to seal the inside of the vacuum film bag so as to be airtight; Coupling a vacuum supply hose to the vacuum supply jig to provide a vacuum inside the vacuum film bag and at the same time coupling a resin supply hose to the resin supply jig to supply resin for impregnation to the reinforcing material; Providing a vacuum inside the vacuum film bag through the vacuum providing hose and the vacuum providing jig; And supplying a resin to a reinforcing material embedded in the vacuum film bag through the resin supply hose and a resin supply jig. Including, and the resin is gradually impregnated into the reinforcing material by the vacuum suction force provided inside the vacuum film bag, so that the composite material in which the reinforcing material and the resin are combined is molded. Provides a molding method.

In the step of sealing the inside of the vacuum film bag to be hermetically sealed, the four rims of the upper vacuum film and the lower vacuum film include a reinforcing material to be impregnated with a resin in the vacuum film bag, and a jig for providing vacuum and a jig for supplying resin It is characterized in that it is bonded by a thermal fusion method after being bonded.

In particular, the vacuum providing jig and the resin supplying jig include: a supporting block embedded in the vacuum film bag is formed at the lower portion, and a fastening block protruding to the outside through the upper vacuum film of the vacuum film bag is integrally formed at the lower portion thereof. , A fixing jig formed through a fluid passage hole in the center; A sealing member seated on the support block and in close contact with the inner surface of the upper vacuum film; A movable jig fastened to a fastening block protruding from the upper vacuum film and in close contact with the sealing member and the upper vacuum film; It characterized in that it is provided in a configuration including a.

In the step of providing the jig for providing vacuum and the jig for supplying resin, a male screw is formed on a peripheral surface of the fastening block of the fixing jig, and a female screw is formed on an inner diameter of the movable jig.

In the step of providing the jig for providing vacuum and the jig for supplying resin, a hollow hose fastening end coinciding with the fluid passage hole is further integrally formed on the fastening block of the fixing jig for the hose press-fitting, and the fixing jig A Teflon coating layer is further formed on the bottom surface of the supporting block to separate the interface with the resin, and two or more steps cut at right angles to rotate the movable jig are further formed on the upper surface of the movable jig.

Preferably, after the composite material in which the reinforcing material and the resin are bonded is molded, a curing process of the composite material is further performed.

More preferably, the curing process of the composite material is performed in an oven, but the curing process is performed at 60 to 80° C. for 120 minutes.

Through the above-described problem solving means, the present invention provides the following effects.

First, a vacuum film bag containing the composite material to be impregnated with the resin, and a vacuum providing jig and a resin supplying jig of the same structure mounted on both sides of the vacuum film bag are used to provide vacuum inside the vacuum film bag while simultaneously supplying the resin. By supplying, the resin is uniformly and uniformly permeated into the composite material by vacuum suction, so that the polymer composite material can be molded and manufactured quickly and accurately.

Second, unlike the problem that air penetrated into the vacuum film in the past, it is possible to keep the inside of the vacuum film bag in a vacuum state at all times, and supplying vacuum and resin using a vacuum providing jig and a resin supplying jig provided in the same structure. Since this can be made smoothly, it is possible to quickly and accurately mold and manufacture a polymer composite material without defective products.

Third, as the existing expensive sealing tape is used for every molding process, it is possible to solve the problem that causes the increase in the consumption of the sealing tape and the resulting cost increase.

1 and 2 are a cross-sectional view and a plan view showing a conventional polymer composite material vacuum forming apparatus and method,
3 is an enlarged view of a main part viewed from the direction'Z' of FIG. 1;
4 and 5 are an exploded perspective view showing a jig in the configuration of the polymer composite material vacuum forming apparatus according to the present invention,
6 is a cross-sectional view showing a polymer composite material vacuum forming apparatus according to the present invention,
7 is a graph showing a curing process in the method of vacuum forming a polymer composite material according to the present invention.

Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

First, in order to help the understanding of the present invention, a structure of a vacuum providing jig and a resin supplying jig among the configurations of the vacuum forming apparatus according to the present invention is as follows.

4 and 5 are an exploded perspective view showing a jig in the configuration of the polymer composite material vacuum forming apparatus according to the present invention, and FIG. 6 is a cross-sectional view showing the polymer composite material vacuum forming apparatus of the present invention including the jig. , In each drawing, reference numeral 200 designates a vacuum supply jig, and reference numeral 300 designates a resin supply jig.

The vacuum providing jig 200 and the resin supplying jig 300 are mounted to be airtightly maintained on one side and the other side of the vacuum film bag 100, and are provided with the same structure and configuration.

To this end, the vacuum providing jig and the resin supplying jig 200 and 300 are a total of three pieces that are detachably assembled from each other, such as a fixed jig 210, a sealing member 220, and a movable jig 230. Consists of

The fixing jig 210 has a supporting block 212 embedded in the vacuum film bag 100 formed at the lower portion, and the upper portion of the fixing jig 210 penetrates the upper vacuum film 102 of the vacuum film bag 100 and protrudes to the outside. The fastening block 214 is provided in an integrally formed structure, and a fluid passage hole 216 is formed through the center of the support block 212 and the fastening block 214.

In addition, on the fastening block 214 of the fixing jig 210, a hollow hose fastening end 218 that matches the fluid passage hole 216 is further integrally formed for the hose press-fitting.

Moreover, a plurality of resin guide grooves 217 intersecting each other for guiding the resin to spread in all directions, for example, a cross-shaped resin guide groove 217 are formed on the bottom of the support block 212 of the fixing jig 210 .

Preferably, a Teflon coating layer 213 for interfacial separation with resin is formed over the bottom surface of the support block 212 including the resin guide groove 217.

At this time, the support block 212 of the fixing jig 212 is formed in a disc shape and is embedded in the vacuum film bag 100, and the fastening block 214 integrally formed on the support block 212 is a support block The hose fastening end 218 formed integrally on the fastening block 214 by passing through the upper vacuum film 102 of the vacuum film bag 100 and protruding to the outside is provided in a cylindrical shape with a diameter smaller than 212 It is provided in the form of a cylinder having a diameter of a level matching the fluid passage hole 216 of the fastening block 214.

The sealing member 220 is provided in a circular ring shape, and when the support block 212 is embedded in the vacuum film bag 100, the bottom surface is seated on the support block 212 and the upper surface thereof is It is in close contact with the inner surface of the upper vacuum film 102.

The movable jig 230 is fastened to a fastening block 214 protruding out of the upper vacuum film 102 of the vacuum film bag 100, and sealed with the upper vacuum film 102 therebetween by a pressing force upon fastening. The member 220 is pressed.

At this time, in order to fasten the movable jig 230 to the fastening block 214 of the fixing jig 210, a male screw 215 is formed on the circumferential surface of the fastening block 214, and the movable jig 230 A female screw 232 is formed in the inner diameter of the.

Moreover, on the upper surface of the movable jig 230, two or more stepped portions 234 cut at right angles are further formed in order for the operator to hold the movable jig 230 and rotate it easily.

On the other hand, the vacuum film bag 100 is provided in a structure in which the four edges of the upper vacuum film 102 and the lower vacuum film 104 having the same area are bonded to each other to be sealed inside.

Preferably, a fastening hole 106 for fastening the vacuum providing jig 200 and the resin supplying jig 300 to one side and the other side of the upper vacuum film 102 of the vacuum film bag 100, respectively That is, a fastening hole 106 through which the fastening block 214 of the fixing jig 210 is protruded to the outside is formed.

At this time, the four rims of the upper vacuum film 102 and the lower vacuum film 104 constituting the vacuum film bag 100 are bonded to each other by a heat-sealing method, so that the inside of the vacuum film bag 100 is sealed. However, before the bonding, the reinforcing material 10 to be impregnated with resin is embedded in the vacuum film bag 100, and the edges are heated in a state in which the vacuum providing jig 200 and the resin supplying jig 300 are combined. It should be joined in a fusion method.

Here, a process of vacuum-forming the polymer composite material using the vacuum film bag 100, the vacuum providing jig 200 and the resin supplying jig 300 provided as described above is described with reference to FIG. 6 To

First, in a state in which the vacuum film bag 100 is placed on the one-sided mold 20, a reinforcing material 10 (for example, dry fiber or preform) to be subjected to resin impregnation, which is a vacuum forming target product, is embedded therein.

In other words, the vacuum film bag 100 is composed of an upper vacuum film 102 and a lower vacuum film 104, and the upper vacuum film 102 and the lower vacuum film 104 are not bonded together. ), a reinforcing material (10, for example, dry fiber or preform) to be impregnated with a resin is interposed therebetween.

Then, the vacuum providing jig 200 and the resin supplying jig 300 are respectively fastened to the fastening holes 106 formed on one side and the other side of the upper vacuum film 102 of the vacuum film bag 100.

To this end, first, the fixing jig 210 is inserted between the upper vacuum film 102 and the lower vacuum film 104, so that the support block 212 of the fixing jig 210 is embedded and the fastening block 214 and the hose are fastened. The end 218 is protruded to the outside of the upper vacuum film 102 through the fastening hole 106.

At this time, before protruding the fastening block 214 and the hose fastening end 218 to the outside, the sealing member 220 is mounted on the supporting block 212, and the movable jig 230 is subsequently attached to the supporting block 212. Fasten and fix.

In more detail, the female screw 232 formed in the inner diameter of the movable jig 230 by holding and rotating the stepped portion 234 of the movable jig 230 is attached to the male screw 215 of the fastening block 214. By fastening, the coupling of the movable jig 230 to the fixing jig 210 is completed, and the sealing member 220 is pressed by the fastening force of the movable jig 230 to maintain airtightness.

In this way, the reinforcing material 10 to be impregnated with resin is embedded in the vacuum film bag 100, and the upper vacuum film 102 and the upper vacuum film 102 are combined with the vacuum providing jig 200 and the resin supplying jig 300. By bonding the four edges of the lower vacuum film 104 by a heat fusion method or the like, the inside of the vacuum film bag 100 is completely hermetically sealed.

Next, the vacuum supply hose 16 and the resin supply hose 18 are connected to the hose fastening end 218 of the vacuum supply jig 200 and the resin supply jig 300, respectively.

At this time, the vacuum supply hose 16 is connected to a vacuum pump 15, which is a vacuum supply device, to provide a vacuum inside the vacuum film bag 100, and the resin supply hose 18 is attached to the reinforcing member 10. It is connected to the resin supply tank 17 to supply resin for impregnation.

Subsequently, vacuum is provided inside the vacuum film bag 100 through the vacuum providing hose 16 and the vacuum providing jig 200 to make the inside of the vacuum film bag 100 negative, and the resin is subsequently supplied. The resin is supplied to the vacuum film bag 100 through the hose 18 and the resin supply jig 300, and the resin is gradually impregnated into the reinforcing material 10 by the vacuum suction force.

At this time, the resin is gradually impregnated into the reinforcing material 10 while easily spreading in all directions in the vacuum film bag 100 through the resin guide groove 217 formed on the bottom surface of the support block 212 of the fixing jig 210. .

Accordingly, when the resin is impregnated over the entire area of the reinforcing material 10, vacuum molding of the composite material is completed.

Next, when the composite material in which the reinforcing material 10 and the resin are combined is completed, curing the composite material in a state in which the composite material is embedded in the vacuum film bag 100 as it is or in a state taken out from the vacuum film bag 100 Proceed with the process.

To this end, it is preferable to put the composite material in an oven and perform the curing process for 30 minutes at an oven temperature of 60 to 80° C. as shown in the graph of FIG. 7. As the process proceeds, internal stress due to thermal stress (latent energy) exists inside the composite material. In order to minimize the internal stress, the first curing process is carried out at 80℃ for 30 minutes, and at 120℃ for 120 minutes. It may be carried out by dividing into a secondary curing process to be performed.

On the other hand, since the Teflon coating layer 213 is formed on the bottom of the support block 212 that is present inside the vacuum film bag 100, the interface with the resin is smoothly separated, and accordingly, the support block 212 Each jig including a can be easily recycled.

As seen above, according to the present invention, the inside of the vacuum film bag using a vacuum film bag containing a composite material to be impregnated with a resin, a vacuum providing jig and a resin supplying jig of the same structure mounted on both sides of the vacuum film bag. By supplying a resin while providing a vacuum to the resin, the resin is uniformly and evenly permeated into the composite material by the vacuum suction force, so that a polymer composite material can be molded and manufactured quickly and accurately.

Meanwhile, the vacuum providing jig 200 and the resin supplying jig 300 may be made of a metal material, and the vacuum providing jig 200 and the resin supplying jig 300 may prevent corrosion of the metal surface. For this purpose, an anti-corrosion coating layer may be applied. The coating material of this anticorrosion coating layer is metcaptotriazole 20% by weight, petroleum sulfonate 15% by weight, mercaptobenzothiazole 10% by weight, hafnium 15% by weight, molybdenum emulsified (MoS2) 10% by weight, oxidation It is composed of 30% by weight of aluminum, and the coating thickness can be formed to 8㎛.

Metcaptotriazole, petroleum sulfonate and mercaptobenzothiazole play a role in preventing corrosion and discoloration.

Hafnium is a transition metal element with corrosion resistance and plays a role in having excellent waterproof and corrosion resistance.

Molybdenum emulsified plays a role of imparting wetness and lubricity to the surface of the coating film.

Aluminum oxide is added for the purpose of fire resistance and chemical stability.

The reason why the ratio of the constituent components and the coating thickness were numerically limited as described above, as a result of the inventor's analysis through the test results several times, showed the optimum anti-corrosion effect at the ratio.

In addition, the vacuum supply hose 16 and the resin supply hose 18 may be coated with a contamination prevention coating layer made of a contamination prevention coating composition so as to effectively achieve the adhesion prevention and removal of contaminants.

The composition for antifouling coating contains alkylate polyglucoside and aminoalkyl slovetaine in a molar ratio of 1:0.01 to 1:2, and the total content of alkylate polyglucoside and aminoalkyl slovetaine is 1 to 10 with respect to the total aqueous solution. % By weight.

The alkylate polyglucoside and aminoalkyl slovetaine are preferably 1:0.01 to 1:2 as a molar ratio.If the molar ratio is out of the above range, the coating property of the substrate decreases or the surface moisture adsorption increases after application, thereby removing the coating film. There is a problem.

The alkylate polyglucoside and aminoalkyl slovetaine are preferably 1 to 10% by weight in the total composition aqueous solution, and if it is less than 1% by weight, there is a problem that the coating property of the substrate is deteriorated, and if it exceeds 10% by weight, the coating film thickness is increased. It is easy to cause crystal precipitation due to.

On the other hand, as a method of applying the present antifouling coating composition to the vacuum providing hose 16 and the resin supply hose 18, it is preferable to apply it by a spray method. In addition, the final coating film thickness on the substrate is preferably 500 to 2000 Å, more preferably 1000 to 2000 Å. If the thickness of the coating film is less than 500 Å, there is a problem of deterioration in the case of high temperature heat treatment, and if it exceeds 2000 Å, there is a disadvantage that crystal precipitation on the coated surface is likely to occur.

In addition, the present antifouling coating composition may be prepared by adding 0.1 mol of alkylate polyglucoside and 0.05 mol of aminoalkyl slovetain to 1000 ml of distilled water, followed by stirring.

In addition, the sealing member 220 may be made of a rubber material, and the raw material content ratio of the sealing member 220 is 60% by weight of rubber, 33 to 36% by weight of carbon black, 2 to 5% by weight of an antioxidant, and an accelerator. 1 to 3% by weight of sulfur is mixed.

Carbon black is to increase abrasion resistance, so it is added, but when the content is less than 33% by weight, elasticity and abrasion resistance decrease, and when it exceeds 36% by weight, the content of rubber, which is a main component, is relatively small, and elasticity may decrease. Mix 33-36% by weight.

Antioxidant is 3C (N-PHENYL-N'-ISOPROPYL- P-PHENYLENEDIAMINE) or RD (POLYMERIZED 2,2,4-TRIMETHYL-1,2-DIHYDROQUINOLINE) to add 2 to 5% by weight, 2 If it is less than% by weight, the product is liable to be oxidized, and if too much is added and exceeds 5% by weight, the content of rubber, which is the main component, is relatively small, and the elasticity may be lowered. ~5% by weight is appropriate.

Sulfur, which is an accelerator, is mixed with 1 to 3% by weight. If less than 1% by weight, the vulcanization effect in the heating process during molding is insignificant, so 1% by weight or more is added. If it exceeds 3% by weight, since the content of the rubber as the main component is relatively small, the elasticity may be lowered, so 1 to 3% by weight is appropriate.

Accordingly, since the present invention is reinforced with synthetic rubber having elasticity in various directions, the elasticity, toughness and rigidity of the sealing member 220 are increased, so that durability is improved, and thus, the life of the sealing member 220 is increased.

10: reinforcement
11: flow auxiliary
12: release film
13: vacuum film
14: sealing tape
15: vacuum pump
16: vacuum supply hose
17: resin supply tank
18: resin supply hose
20: one-sided mold
100: vacuum film bag
102: upper vacuum film
104: lower vacuum film
106: fastening hole
200: Jig for providing vacuum
210: fixed jig
212: Support block
213: Teflon coating layer
214: fastening block
215: male thread
216: fluid passage hole
217: resin guide groove
218: hose connection end
220: sealing member
230: movable jig
232: female thread
234: step
300: resin supply jig

Claims (10)

The vacuum film bag 100 in which the reinforcing material 10 to be impregnated with resin is embedded;
A vacuum providing jig 200 mounted to be airtight on one side of the vacuum film bag 100;
A resin supply jig 300 mounted to be airtight on the other side of the vacuum film bag;
A vacuum providing hose 16 having one end coupled to the vacuum providing jig 200 and the other end connected to the vacuum pump 15 to provide vacuum in the vacuum film bag 100; And
One end is coupled to the resin supply jig 300 so that the resin for impregnation is supplied to the reinforcing material 10 by the vacuum suction force supplied from the vacuum supply hose 16, and the other end is a resin supply tank 17 ) It is configured to include a resin supply hose 18 connected to the side;
The vacuum providing jig and resin supplying jig 200 and 300 are:
A supporting block 212 embedded in the vacuum film bag 100 is formed at the lower part, and a fastening block 214 protruding to the outside through the upper vacuum film 102 of the vacuum film bag 100 is integrally formed at the upper part. A fixing jig 210 having a fluid passage hole 216 formed therethrough in the center;
A sealing member 220 that is seated on the support block 212 and in close contact with the inner surface of the upper vacuum film 102;
A movable jig 230 that is fastened to a fastening block 214 protruding from the upper vacuum film 102 and is in close contact with the sealing member 220 and the upper vacuum film 102 therebetween;
A molding apparatus for a composite material using VARTM, characterized in that consisting of.
delete delete The method according to claim 1,
A male screw 215 is formed on the peripheral surface of the fastening block 214 of the fixing jig 210, and a female screw 232 is formed on the inner diameter of the movable jig 230;
A composite material using VARTM, characterized in that on the fastening block 214 of the fixing jig 210, a hollow hose fastening end 218 that matches the fluid passage hole 216 is further integrally formed for the hose press-fitting. Molding device.
The method according to claim 1,
A plurality of resin guide grooves 217 intersecting each other for guiding the resin to spread in all directions are formed on the bottom of the support block 212 of the fixing jig 210, and the support block 212 including the resin guide groove 217 A molding apparatus for a composite material using VARTM, characterized in that a Teflon coating layer (213) for interfacial separation with a resin is formed over the bottom surface of ).
The method according to claim 1,
An apparatus for forming a composite material using VARTM, characterized in that at least two stepped portions 234 cut at right angles to rotate the movable jig 230 are further formed on the upper surface of the movable jig 230.
As a method of molding with a molding apparatus for a composite material using the VARTM of claim 1,
Providing a vacuum film bag 100 made of an upper vacuum film 102 and a lower vacuum film 104 that can be bonded to each other;
Providing a vacuum providing jig 200 for providing a vacuum inside the vacuum film bag 100 and a resin supplying jig 300 for supplying a resin;
At the same time, a jig 200 for providing a vacuum is fastened to one side of the vacuum film bag 100 so as to be airtight, and at the same time, a jig for supplying a resin 300 is fastened to the other side of the vacuum film bag 100 so as to be airtight. Step to do;
After embedding the reinforcing material 10 to be impregnated with resin inside the vacuum film bag 100, all sides of the upper vacuum film 102 and the lower vacuum film 104 are bonded to each other to form the inside of the vacuum film bag 100. Sealing the airtightly;
In order to provide a vacuum inside the vacuum film bag 100, a vacuum providing hose 16 is coupled to the vacuum providing jig 200, and at the same time, the resin is used to supply a resin for impregnation into the reinforcing material 10. Coupling the resin supply hose 18 to the supply jig 300;
Providing a vacuum inside the vacuum film bag 100 through the vacuum providing hose 16 and the vacuum providing jig 200; And
Supplying a resin to the reinforcing material 10 embedded in the vacuum film bag 100 through the resin supply hose 18 and the resin supply jig 300;
Including,
VARTM, characterized in that the resin is gradually impregnated into the reinforcing material 10 by the vacuum suction force provided inside the vacuum film bag 100 to form a composite material in which the reinforcing material 10 and the resin are combined. The method of molding composite materials used.
The method of claim 7,
In the step of sealing the inside of the vacuum film bag 100 to be airtight,
The four rims of the upper vacuum film 102 and the lower vacuum film 104 have a reinforcing material 10 to be impregnated with a resin inside the vacuum film bag 100, and a jig 200 for providing vacuum and a jig for supplying resin (300) A method of forming a composite material using VARTM, characterized in that after bonding is bonded by a thermal fusion method.
delete The method of claim 7,
After the reinforcing material 10 and the resin-bonded composite material is molded, the composite material is further cured;
The curing process of the composite material is performed in an oven, but the method of forming a composite material using VARTM, characterized in that the curing process proceeds for 120 minutes at 60 ~ 80 ℃.

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