KR20130105015A - Light-resin transfer molding apparatus for fiber-reinforced plastic with handle - Google Patents
Light-resin transfer molding apparatus for fiber-reinforced plastic with handle Download PDFInfo
- Publication number
- KR20130105015A KR20130105015A KR1020120027079A KR20120027079A KR20130105015A KR 20130105015 A KR20130105015 A KR 20130105015A KR 1020120027079 A KR1020120027079 A KR 1020120027079A KR 20120027079 A KR20120027079 A KR 20120027079A KR 20130105015 A KR20130105015 A KR 20130105015A
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- South Korea
- Prior art keywords
- fiber
- molds
- mold
- reinforced plastic
- vacuum
- Prior art date
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/06—Fibrous reinforcements only
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
- B29C70/28—Shaping operations therefor
- B29C70/40—Shaping or impregnating by compression not applied
- B29C70/42—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles
- B29C70/46—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs
- B29C70/48—Shaping or impregnating by compression not applied for producing articles of definite length, i.e. discrete articles using matched moulds, e.g. for deforming sheet moulding compounds [SMC] or prepregs and impregnating the reinforcements in the closed mould, e.g. resin transfer moulding [RTM], e.g. by vacuum
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2875/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as mould material
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2883/00—Use of polymers having silicon, with or without sulfur, nitrogen, oxygen, or carbon only, in the main chain, as mould material
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Composite Materials (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The resin transfer molding apparatus of the fiber-reinforced plastic using the upper and lower molds according to the present invention comprises: a lower mold having at least two vacuum grooves; An upper mold coupled to the lower mold upper side to form a complementary shape to form the vacuum groove; A resin injection valve for injecting resin into a space formed by engagement of the lower and upper molds; At least one vacuum suction valve installed to remove air in the vacuum groove and the space; And at least two handles which are installed at any one of the lower and upper molds and which the worker can grip by hand.
Description
The present invention relates to an apparatus for resin transfer molding of fiber-reinforced plastics, and more specifically, using a pair of upper and lower molds, fiber-reinforced plastics using upper and lower molds having a handle capable of producing a product with minimal post-processing. It relates to a resin transfer molding apparatus.
Due to the continuous increase in oil prices and environmental pollution, research on high fuel consumption vehicles has been continuously conducted in recent years. In particular, electric vehicles, which have a significantly lower pollutant emission rate than gasoline or diesel engines, are in the spotlight as the next generation vehicle.
As well as the development of such an electric vehicle, the most important part in improving the fuel efficiency of the existing vehicle is to minimize the power consumption of the drive source due to the weight of the vehicle body by forming the vehicle body appearance with a light weight material while maintaining the rigidity to the maximum.
In particular, since steel-based body materials currently in use have limitations in weight reduction, a method for producing various parts for automobile bodies and automobiles using fiber-reinforced plastic resins (FRP) that are light, durable and excellent in recent years. Research is ongoing.
As described above, a fiber reinforced plastic (FRP) is typically proposed as a composite material as a steel substitute, and a hand ray using polyester, vinyl ester, epoxy resin, or the like is used to manufacture vehicle parts using such composite material. The HAND LAY UP method is generally used. This is a method of placing dry chopped strand mats one by one on the outer mold of the outer shape of the product, pouring a liquid resin on it, and then impregnating the resin in the fiber mat using a roller, followed by hardening, and molding. . This method is a manual process, which implies quality problems such as durability of the product and surface defects, and raises the cost of parts due to difficulty in mass production. In addition, since the quality of the product depends on the skill of the operator, there is a problem that it is difficult to ensure uniform quality, there is a limit in the amount of production.
A method developed to solve this problem is a resin transfer molding method. The RTM method places the preform of the product shape made of reinforcing fibers in the space between the molds having the outer shape of the product, and then closes the upper and lower molds and injects the resin at a high pressure using a resin injector. It is a method for producing a fiber-reinforced plastic of a desired shape by curing in the injected state.
This RTM method has the advantage of being able to produce a uniform product compared to the manual hand lay-up method.However, since the upper and lower shape forming materials are made of hard metal or wood, the part caught by the mold during the demoulding is damaged or deformed. It will have an undercut phenomenon. Therefore, it is difficult to produce a molded product that is deeply embedded or protrudes in either direction.
In addition, there is a need for a step of heating and drying the mold after the resin is injected into the heating furnace. During this process, no other work can be performed, and thus there is a problem in that productivity may decrease.
The present invention was conceived in view of the above, the productivity can be improved compared to the existing RTM method, the fiber using the upper and lower molds that can form a fiber-reinforced plastic products of various thicknesses using a single mold It is an object of the present invention to provide a resin transfer molding apparatus for reinforced plastics.
It is a further object of the present invention to provide an apparatus having a construction which can protect the worker when transporting individual molds for drying and heating.
The resin transfer molding apparatus of the fiber-reinforced plastic using the upper and lower molds according to the present invention comprises: a lower mold having at least two vacuum grooves; An upper mold coupled to the lower mold upper side to form a complementary shape to form the vacuum groove; A resin injection valve for injecting resin into a space formed by engagement of the lower and upper molds; At least one vacuum suction valve installed to remove air in the vacuum groove and the space; And at least two handles which are installed at any one of the lower and upper molds and which the worker can grip by hand.
The handle may be formed of the same material as the lower and upper molds, and the lower and upper molds may be formed of any one of silicon and urethane.
According to the present invention as described above, since the fiber-reinforced plastic is molded by using the upper and lower molds, the surface facing the mold can be formed smoothly, compared to the conventional hand layup process, the time required for post-processing products Can be reduced.
In addition, compared with the conventional RTM method, the upper and lower molds can be kept in close contact with each other through vacuum adsorption. And since only the lower mold can be put into the heating and drying process, it is possible to increase the production speed and production compared to the process using only one mold.
In addition, since the handle is formed integrally with any one of the upper and lower molds, it is possible for the operator to carry the mold more easily when transporting the upper and lower molds in a combined state for heating and drying.
1 is a perspective view showing an example of a product molded by a fiber-reinforced plastic resin transfer molding method using the upper and lower molds according to the present invention,
2 is a cross-sectional view of the upper and lower molds for forming the product of FIG. 1, and
3 is a schematic perspective view of FIG. 2.
Hereinafter, the resin transfer molding method of the fiber-reinforced plastic using the upper and lower molds according to the present invention will be described with reference to the drawings.
1 is a perspective view showing an example of a product molded by a fiber-reinforced plastic resin transfer molding method using the upper and lower molds according to the present invention according to the present invention, Figure 2 is a top and bottom of the mold for forming the product of Figure 1 3 is a schematic perspective view of FIG. 2.
FIG. 1 is a view illustrating a side mirror generally used in a vehicle, and a vehicle part such as the side mirror is produced by injection molding using plastic, and the like. However, the general plastic injection molding is frequently exposed to direct sunlight and high temperature environment, the deformation of the material is concerned, the strength is also not high, and products using fiber-reinforced plastics (FRP) has recently been in the spotlight. Such fiber-reinforced plastics can be applied to various vehicle parts such as spoilers, bumpers, moldings, as well as the side mirrors, and in recent years, also used as a material for forming the exterior of small-sized vehicles such as single-seater electric vehicles. Is gradually widening.
FIG. 2 is a view showing a schematic configuration diagram of a device for a method of transport molding a fiber-reinforced plastic using upper and lower molds for forming a product using such fiber-reinforced plastic.
As shown, the fiber-reinforced plastic molding apparatus according to the present invention provides a lower mold (10), the
The material of the upper and
Meanwhile, a
In addition, as shown in Figure 2, the
In addition, a first sealing member S1 may be interposed between the first vacuum groove V1 and the second vacuum groove V2, and a second sealing member may be disposed outside the second vacuum groove V2. S2) can be installed.
The first and second sealing members S1 and S2 may be formed of different materials. According to a preferred embodiment of the present invention, the first sealing member S1 may be formed of a silicon material. The second sealing member S2 is preferably formed of a foamable resin material.
The reason why the materials of the first and second sealing members S1 and S2 are made of different materials as described above is due to the difference in their roles and the material properties of the fiber-reinforced plastics used for product molding.
That is, since the raw material of the fiber-reinforced plastic material is in a swelled state before pressing, the space 100 (see FIG. 2) is maintained at a constant volume by pressing and adhering the upper and
However, as described above, when the first and second vacuum grooves V1 and V2 are configured by forming the first and second sealing members S1 and S2 of different materials, the upper and lower molds ( It is possible to maintain the adhesiveness of 20) (10) without problems.
Meanwhile, the
Meanwhile, a
When the
According to such a configuration, in the state in which the first to
However, in the present invention, in order to ensure the stability of the mold apparatus, as shown in Figures 2 and 3, a plurality of separate fixing
On the other hand, although not shown, the
As shown in FIG. 3, at least two
In addition, the
Meanwhile, the
In addition, the
Although embodiments according to the present invention have been described above, these are merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent ranges of the embodiments are possible. Accordingly, the true scope of the present invention should be determined by the following claims.
One; Molded
20;
22;
31;
33;
41;
43;
V1; First vacuum groove V2; 2nd vacuum groove
S1; First sealing member S2; Second sealing member
50; Fixing
Claims (3)
An upper mold coupled to the lower mold upper side to form a complementary shape to form the vacuum groove;
A resin injection valve for injecting resin into a space formed by engagement of the lower and upper molds;
At least one vacuum suction valve installed to remove air in the vacuum groove and the space; And
Resin transfer molding apparatus of the fiber-reinforced plastic using the upper and lower molds, which is installed in any one of the lower and upper molds, at least two handles that can be gripped by the operator by hand.
Resin transfer molding apparatus of fiber-reinforced plastic using the upper and lower molds formed of the same material as the lower and upper molds.
The lower and upper molds, the resin transfer molding apparatus of the fiber-reinforced plastic using the upper and lower molds formed of any one material of silicone and urethane.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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KR1020120027079A KR20130105015A (en) | 2012-03-16 | 2012-03-16 | Light-resin transfer molding apparatus for fiber-reinforced plastic with handle |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
KR1020120027079A KR20130105015A (en) | 2012-03-16 | 2012-03-16 | Light-resin transfer molding apparatus for fiber-reinforced plastic with handle |
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KR20130105015A true KR20130105015A (en) | 2013-09-25 |
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KR1020120027079A KR20130105015A (en) | 2012-03-16 | 2012-03-16 | Light-resin transfer molding apparatus for fiber-reinforced plastic with handle |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20190047874A (en) | 2017-10-30 | 2019-05-09 | 주식회사 티포엘 | Die for flat plate resin transfer molding using vacuum suction and method for molding using the same |
-
2012
- 2012-03-16 KR KR1020120027079A patent/KR20130105015A/en not_active Application Discontinuation
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20190047874A (en) | 2017-10-30 | 2019-05-09 | 주식회사 티포엘 | Die for flat plate resin transfer molding using vacuum suction and method for molding using the same |
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