JPH10166492A - Hybrid fiber-reinforced plastic molded piece and its molding method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To reduce a depositing amount of reinforcing fibers to be wound and layered in a form by stacking a molding layer impregnated with resin and solidified in th form and fiber-reinforced plastic molded piece previously molded by a simple method in an another process. SOLUTION: A second molded piece 7 obtained by impregnating second reinforcing fibers 6 with resin and molding it previously in another process in a shape matching to a surface shape (lattice state) of a grating as a portion for constituting a lower surface of the grating is disposed in a form. Then, first reinforcing fibers 4 are wound, stacked and brained in the form at an upper side of the molded 7, and then impregnated with resin of unreacted solution state to prepare a portion to become a first molded piece 5. Then, a second molded piece 7 for constituting an upper surface of a grating is disposed at the upper side. The resin is cured in this state, and released from the form. Thus, an intermediate part in upward and downward directions become the first molded piece 5.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

TECHNICAL FIELD The present invention relates to a floor of a work room,
Hybrid fiber reinforced plastic moldings obtained by impregnating and curing resin in a core made of laminated reinforcing fibers of two or more different strengths, such as gratings used as scaffolds for outdoor workplaces, and the same. It relates to a molding method.

[0002]

2. Description of the Related Art FIG. 1 shows a grating 1 having a hybrid structure which is an example of a hybrid fiber reinforced plastic molded article. As shown in FIG. 2, the grating 1 is a reinforcing fiber having a general strength. On both upper and lower sides of the glass fiber 2, a carbon fiber 3 having a higher strength than the glass fiber 2 is formed by impregnating a resin into a core body formed by laminating and braiding.

[0003]

In the above prior art,
In order to increase the strength as a hybrid structure or to provide rigidity, two or more types of reinforcing fibers are laminated and braided as described above, but when these different types of reinforcing fibers are laminated while being wound one by one in a formwork, There is a problem in that switching of fibers is troublesome, and in particular, when the number of switching of the reinforcing fibers is large, the operation becomes more complicated.

[0004]

SUMMARY OF THE INVENTION An object of the present invention is to provide a hybrid fiber reinforced plastic molding and a molding method thereof which can solve the above-mentioned conventional problems. The hybrid fiber reinforced plastic molded article is a hybrid fiber reinforced plastic molded article obtained by impregnating a resin into a core body in which two or more types of reinforcing fibers are laminated, and curing the resin. The fibers are configured to be contained in a fiber-reinforced plastic molded body that has been impregnated with a resin and cured in advance.

[0005] In this configuration, a reinforcing layer wound and laminated in a mold for molding a molded body is impregnated with a resin in the mold to form a molding layer which is solidified by another process. By laminating with the fiber-reinforced plastic molded article previously molded in the above, the amount of the reinforcing fibers to be wound and laminated in the formwork can be reduced.

Accordingly, the number of laminating operations including the step of winding the reinforcing fibers in the formwork can be reduced, the molding can be performed at low cost, and the molding quality can be stabilized. In addition, the number of preformed moldings can be adjusted according to the application, and thus the strength of the hybrid fiber reinforced plastic molding can be set variously.

In the hybrid fiber reinforced plastic molded product according to the second aspect, the molded product is a grating, so that the grating can be molded at low cost.
In addition, stable molding quality can be obtained, and the strength can be set variously.

The hybrid fiber reinforced plastic molded product according to the third aspect of the present invention is characterized in that the fiber reinforced plastic molded product obtained by impregnating a reinforcing fiber with a resin in advance and hardening is disposed near the upper surface and the lower surface of the grating. By using a reinforcing fiber of the preformed fiber-reinforced plastic molded article that is stronger than other reinforcing fibers, the strength, particularly the bending strength, of the hybrid fiber-reinforced plastic molded article can be improved.

A hybrid fiber reinforced plastic molded product according to a fourth aspect of the present invention has a structure in which a fiber reinforced plastic molded product in which a reinforcing fiber is impregnated with a resin in advance and cured is sequentially laminated and cured and bonded with a resin. As a result, it is possible to mold a hybrid fiber reinforced plastic molded body without working by winding the reinforcing fiber in the formwork, and it is possible to easily mold grating having a lattice shape. . In addition, a fiber-reinforced plastic molded body having different reinforcing fibers can be arbitrarily used, and the strength of the molded body can be arbitrarily set.

According to a fifth aspect of the present invention, there is provided a method for forming a hybrid fiber reinforced plastic molded article, comprising the steps of: laminating a reinforcing fiber; impregnating the reinforcing fiber with a resin; The method comprises the steps of arranging a fiber-reinforced plastic molded article obtained by impregnating a reinforcing fiber with a resin and curing the resin, and curing the resin. The hybrid fiber-reinforced plastic molded articles according to the respective inventions described above can be sequentially and efficiently molded.

Further, according to a method of molding a hybrid fiber-reinforced plastic molded article according to claim 6, a plurality of fiber-reinforced plastic molded articles formed by impregnating a reinforcing fiber with a resin in advance are laminated, and the laminated fiber-reinforced plastic molded article is laminated. A resin is poured between the molded bodies, and the resin is cured. According to this molding method, the hybrid fiber-reinforced plastic molded body according to the fourth aspect can be molded efficiently.

[0012]

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIG. FIG. 3 shows a grating 1 'having a hybrid structure which is an example of the hybrid fiber-reinforced plastic molded product according to the present invention. As shown in FIG. The first molded body 5 which is formed by impregnation, and the upper and lower sides of the second molded body 5 which are obtained by impregnating the second reinforcing fiber 6 with a resin to form the first molded body 5 It has a configuration in which second formed bodies 7, 7 formed in different steps are stacked. The first reinforcing fiber 4 is made of glass fiber having general strength, and the second reinforcing fiber 6 is made of carbon fiber, aramid fiber, or piano wire, which is stronger than glass fiber.

A method of forming the grating 1 'will be described with reference to FIG. First, as a portion constituting the lower surface portion of the grating 1 ′, the second reinforcing fiber 6 was previously impregnated with a resin in a separate process into a shape corresponding to the surface shape (lattice shape) of the grating 1 ′. Second molded body 7
Is arranged in a mold frame 8, and then, on the upper side of the second molded body 7, the first reinforcing fiber 4 is wound and laminated and braided in the mold frame 8, and then the first reinforcing fiber 4 is A part to be the first molded body 5 is prepared by impregnating the resin in the unreacted solution state, and then the other second molded body 7 constituting the upper surface of the grating 1 ′ is formed on the upper part thereof. Deploy. In this state, the resin is cured and released. Thereby, as shown in FIG. 4, the middle in the vertical direction becomes the first molded body 5, and the second molded bodies 7, 7 are arranged above and below this. The two molded bodies 7 are welded and integrated with the first molded body 5 when the unreacted solution resin of the first molded body 5 is cured.

As described above, the second molded body 7 used at this time has a lattice shape in plan view, so that the molding of the second molded body 7 is performed by the first molded body. As in the case of 5, the reinforcing fibers 6 are wound and laminated in a lattice-shaped formwork and then impregnated with a resin. At this time, the second molded body 7 is made of the grating 1 ' Since the thickness is sufficiently smaller than the thickness, the molding of the second molded body 7 can be easily performed. The reinforcing fibers 6 used at this time may be either long or short, but long fibers can be continuously laminated and have high strength.

FIGS. 6 and 7 show another embodiment of the present invention, in which a plurality of reinforcing fibers made of a fiber-reinforced plastic molded in a separate step in advance and having different types of reinforcing fibers are used. , For example, two types of third and fourth
The molded bodies 9 and 10 are sequentially arranged orthogonally in the mold frame 8 and laminated, and then, a resin in an unreacted solution state is poured into the mold frame 8 and cured.

The two compacts 9 and 10 are successively stacked in the mold frame 8 without any gap at the grid-like intersection, but at other locations than the intersection, a gap 11 corresponding to the thickness of each compact 9 and 10 is formed. The resin is injected into the gap 11 and cured, whereby the molded bodies 9 and 10 laminated in the mold 8 are integrally formed as a grating 1 '. The sectional shapes of the vertical and horizontal portions of the grating 1 'thus formed are as shown in FIGS. 7A and 7B. In one of the sectional shapes, the third molded body 9 and the resin are formed. Layers 12 are alternately laminated, and the fourth molded body 1 is formed in the other cross-sectional shape.
0 and the resin layer 12 are alternately laminated.

In the third and fourth molded bodies 9, 10, for example, expensive carbon fibers having high strength are used as reinforcing fibers of the third molded body 9, and the fourth molded body 10 When inexpensive glass fiber is used as the reinforcing fiber, the expensive third molded body 9 may be arranged only at the upper and lower positions, and the inexpensive fourth molded body 10 may be used for other laminated molded bodies. Good. In this case, sufficient strength can be obtained by arranging high-strength layers in the upper and lower layers.

[Brief description of the drawings]

FIG. 1 is a perspective view showing a part of a conventional grating.

FIG. 2 is a sectional view taken along line AA of FIG.

FIG. 3 is a perspective view showing a part of a grating which is a molded body according to the first embodiment of the present invention.

FIG. 4 is a sectional view taken along line A′-A ′ of FIG. 3;

FIG. 5 is a perspective view showing a part of a forming step of a formed body according to the first embodiment of the present invention.

FIG. 6 is an exploded perspective view showing a part of a molding step of a molded article according to a second embodiment of the present invention.

FIGS. 7 (a) and 7 (b) are cross-sectional views of a vertical portion and a horizontal portion of a molded article molded by a molding method according to a second embodiment of the present invention.

[Explanation of symbols]

 1, 1 '... grating 2 ... glass fiber 3 ... carbon fiber 4, 6 ... first and second reinforcing fibers 5, 7 ... first and second molded bodies 8 ... formwork 9, 10 ... third and third Molded article 4 11: gap 12: resin layer

Claims (6)

[Claims] 1. A hybrid fiber-reinforced plastic molded article obtained by impregnating a resin with a core body in which two or more kinds of reinforcing fibers are laminated and curing the resin, at least one kind of the reinforcing fibers is A hybrid fiber reinforced plastic molded product which is contained inside a fiber reinforced plastic molded product which has been impregnated with a resin and cured in advance. 2. The hybrid fiber reinforced plastic molded body obtained by impregnating a resin into a core body in which two or more types of reinforcing fibers are laminated and curing the resin is grating. Hybrid fiber reinforced plastic molding. 3. A hybrid fiber reinforced plastic molding according to claim 2, wherein fiber reinforced plastic moldings in which a reinforcing fiber is impregnated with a resin in advance and hardened are arranged near the upper surface and the lower surface of the grating. body. 4. A fiber-reinforced plastic molded body in which a reinforcing fiber is impregnated with a resin in advance and cured, and is sequentially laminated and hardened with a resin.
Or a hybrid fiber-reinforced plastic molded product according to item 3. 5. A step of laminating reinforcing fibers, a step of impregnating the reinforcing fibers with a resin, and a fiber-reinforced plastic molded article wherein at least one surface of the reinforcing fibers to be laminated is impregnated with the resin in advance and cured. Arranging the
A method of curing a resin, comprising: a step of curing a resin. 6. A plurality of fiber-reinforced plastic moldings formed by impregnating resin into reinforcing fibers in advance, and
A method of molding a hybrid fiber reinforced plastic molded article, comprising: pouring a resin between the laminated fiber reinforced plastic molded articles and curing the resin.