JP3588506B2 - Method for producing long fiber reinforced foam molded article - Google Patents

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a long fiber reinforced foam molded article and a method for producing the same.
[0002]
[Prior art]
2. Description of the Related Art A long fiber reinforced foamed molded article which is similar in appearance to natural wood and has physical properties equal to or higher than that of natural wood is used as a structure of a building material or the like.
As disclosed in Japanese Patent Publication No. 52-2421 and Japanese Patent Application Laid-Open No. 5-237947, such a conventional long-fiber reinforced foamed molded article has a plate-shaped or rod-shaped molded body which is foam-curable. It is formed by foaming and curing a resin liquid, and long fiber glass fibers are buried in the molded body as a reinforcing material so as to be substantially parallel to the longitudinal direction of the molded body.
[0003]
[Problems to be solved by the invention]
However, as described above, in the conventional long-fiber reinforced foamed molded article, the long-fiber reinforced material for reinforcement is buried side by side substantially in parallel only in the longitudinal direction of the molded body main body. There is a drawback that cracks easily occur when a bending force is applied in a parallel direction or when nailing is performed.
[0004]
In view of such circumstances, the present invention applies a bending force parallel to the long fiber reinforcing material, and has excellent strength in a long fiber reinforced foamed molded article which does not crack even when nailing or the like. It is intended to provide a manufacturing method thereof.
[0005]
[Means for Solving the Problems]
In order to achieve such an object, a long fiber reinforcing material oriented in one direction is embedded in multiple layers in a molded body made of a curable resin foam, and a short fiber reinforcing material is irregularly embedded in the molded body. A method for producing a long-fiber-reinforced foamed article in which the short-fiber reinforcement at the interface of the long-fiber reinforcement is intermingled with the long-fiber reinforcement while being dispersed in various directions. The aligned fiber bundle group of the long fiber reinforcement is continuously advanced in the direction of the molding passage, and a net slightly wider than the width of the molded body is arranged between the fiber bundle group and the fiber bundle group. After advancing continuously in the direction of the molding path together with the long fiber bundle, and in the middle of the advancing, the short fiber reinforcing material is sprayed on each net from a short fiber spreader to attach the short fiber reinforcing material to each net, Curing from the sprayer located in the back The resin was sprayed on the fiber bundle group and on the net with adhering to the short fiber bundles attached to the long fiber bundles and nets, the long fiber reinforcement and short fiber reinforcement the Momihogushi long fiber reinforcement and short fiber reinforcement The foaming-curable resin liquid is sufficiently impregnated, guided into a molding passage, and foam-cured in the molding passage to form a cross-sectional shape of the molding passage.
[0006]
In the above configuration, the foam-curable resin liquid means a liquid resin that foams and hardens in a relatively short time. For example, a resin liquid such as a polyurethane resin, a phenol resin, or a polyester resin is suitably used. Accordingly, additives such as a catalyst, a colorant, and an ultraviolet absorber may be added and mixed.
Examples of the long fiber reinforcing material include organic fibers such as polyester fibers, carbon fibers, and glass fibers, and glass fiber roving is preferable.
[0007]
The molding passage is not particularly limited, but is preferably formed by combining four endless belts made of steel.
Examples of the net include, but are not particularly limited to, synthetic resin fibers such as polyester resin fibers. The width of the net is preferably slightly wider than the width of the molded product to be obtained, and the size of the net is preferably about 5 mm.
[0008]
The short fiber reinforcing material is not particularly limited, but is preferably of the same material as the long fiber reinforcing material, and its length is preferably about 3 mm.
[0009]
The long-fiber-reinforced foamed molded article produced by the present invention has a short-fiber reinforced material because the short-fiber reinforced material is dispersed in the molded body when a bending force parallel to one long-fiber reinforced material is applied. Support this bending force.
In addition, since the long fiber reinforcement and the short fiber reinforcement intersect alternately at the interface, the force applied to the long fiber reinforcement or the short fiber reinforcement is dispersed to the short fiber reinforcement or the long fiber reinforcement. Is done.
[0010]
According to the configuration of the present invention, the long fiber reinforcing materials aligned in one direction are arranged in multiple stages in the upper and lower directions, and are continuously advanced in one direction in one direction, and foaming which becomes a molded body in the middle of the progress is performed. Sprinkle the curable resin liquid and the short fiber reinforcing material from above.
Then, when the long fiber reinforcing material and the short fiber reinforcing material are rubbed and loosened, the long fiber reinforcing material and the short fiber reinforcing material are sufficiently impregnated with the foaming curable resin liquid, and the short fiber reinforcing material at the interface of the long fiber reinforcing material is provided. Are mixed with the long fiber reinforcing material.
[0011]
Next, the foaming-curable resin liquid foams along the inner wall surface of the molding passage in the molding passage, and is further cured to form a molded body.
[0012]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described in detail with reference to the drawings showing the embodiments.
[0013]
FIG. 1 shows an embodiment of a long-fiber reinforced foam molded article produced according to the present invention.
As shown in FIG. 1 , the long fiber reinforced foam molded body 1b includes a molded body 11 made of a curable resin foam.
[0014]
In the molded body 11, a large number of unidirectionally oriented long fiber reinforcements 12... 12 are embedded in multiple layers, and the short fiber reinforcements 14. Have been.
Moreover, the short fiber reinforcing material 14 located at the interface with the long fiber reinforcing material 12 is partially intertwined with the long fiber reinforcing material 12.
[0015]
The molded body 1b is embedded in multiple layers in such a state that a large number of long fiber reinforcements 12... 12 are oriented in one direction, and the short fiber reinforcements 14. Even if a bending force is applied in any of the vertical and horizontal directions, it is reinforced by the long fiber reinforcements 12... 12 or the short fiber reinforcements 14. Of course, it does not break even if nailing is performed. In addition, since the short fiber reinforcing member 14 located at the interface with the long fiber reinforcing member 12 is partially intertwined with the long fiber reinforcing member 12, the short fiber reinforcing member 12 (or the short fiber reinforcing member 12). The force applied to the material 14) is dispersed to the short fiber reinforcing material 14 (or the long fiber reinforcing material 12), so that the reinforcing strength is higher.
[0016]
In addition, this molded body 1b can be manufactured as follows.
(1) As shown in FIG. 2 , a fiber bundle group 24 of long fiber bundles 23 arranged at a desired pitch is continuously formed through small holes 22 provided in fiber arrangement plates 21, 21, 21, 21 arranged vertically. And the net 4b slightly wider than the width of the molded body 1b is disposed between the fiber bundle group 24 and the fiber bundle group 24, and the net 4b is continuously formed together with the long fiber bundle 23. In the direction of the molding passage 3.
[0017]
(2) On the way, first, the short fiber reinforcements 14 are sprayed from the short fiber spreader 5b on each net 4b, and the short fiber reinforcements 14... 14 are attached to the hot 4b. The curable foamed resin liquid 51 is sprayed onto the fiber bundle group 24 and the net 4b from the sprayer 5a disposed on the short fiber reinforcing members 14 and attached to the long fiber bundle 23 and the net 4b.
[0018]
(3) The fiber bundle group 24 and the net 4b are converged at the impregnating table 6, sandwiched between impregnating plates 61, 61 provided above the impregnating table 6, and the impregnating plate 61 is slid left and right as indicated by arrows. the short fiber reinforcing material 14 ... 14 attached to the long fiber bundles 23 and nets 4b Te kneading, to obtain a forming raw material 8.
That is, by rubbing in this manner, the long fiber reinforcement 12 constituting the long fiber bundle 23 is dispersed, and the curable foamed resin liquid 51 is sufficiently provided between the long fiber reinforcement 12 and the short fiber reinforcement 14. Impregnated. Moreover, the short fiber reinforcements 14... 14 at the interfaces of the long fiber reinforcements 12 are intertwined with the long fiber reinforcements 12.
[0019]
The disperser 5a and the short fiber disperser 5b reciprocate in the width direction of the fiber bundle group 24 to disperse the curable foamed resin liquid 51 and the short fiber reinforcing material.
[0020]
(4) The molding raw material 8 thus obtained is further guided to the molding passage 3, and the curable foamed resin liquid 51 is foamed and hardened in the molding passage 3 to form a plate-shaped member having the cross-sectional shape of the molding passage 3. The long fiber reinforced foam molded article 1b is obtained.
That is, according to this method, the long fiber reinforced foamed molded product 1b of the present invention can be continuously and efficiently obtained.
[0021]
【The invention's effect】
The long-fiber-reinforced foamed article manufactured according to the present invention is excellent in strength without being subjected to a bending force parallel to the long-fiber reinforcement or being cracked even when nailed or the like. It can also be used for applications that could not be done.
[0022]
The manufacturing method of the long fiber reinforced foam molding of the present invention can continuously and efficiently obtain the above fiber reinforced foam molding.
[Brief description of the drawings]
FIG. 1 is a perspective view showing one embodiment of a long fiber reinforced foam molding produced according to the present invention .
FIG. 2 is a perspective view showing one embodiment of a method for producing a long fiber reinforced foam molding of the present invention .
[Explanation of symbols]
1b Long Fiber Reinforced Foam Molded Body 11 Molded Body 12 Long Fiber Reinforcement 14 Short Fiber Reinforcement 3 Forming Path 4b Net
23 Fiber bundle 51 Foam curable resin liquid

Claims (1)

Long fiber reinforcements oriented in one direction are buried in multiple layers in a molded body made of a curable resin foam, and short fiber reinforcements are dispersed in the molded body with an irregular directionality, A method for producing a long-fiber-reinforced foamed article in which short-fiber reinforcement at the interface of the long-fiber reinforcement intersects with the long-fiber reinforcement, wherein the fiber bundle of the long-fiber reinforcement is aligned in one direction. The group is continuously advanced in the direction of the forming passage, and a net slightly wider than the width of the formed body is arranged between the fiber bundle group and the fiber bundle group, respectively. After advancing in the direction of the passage, on the way, the short fiber reinforcing material is sprayed on each net from the short fiber spreading machine to attach the short fiber reinforcing material to each net, and then from the spreading machine arranged rearward in the moving direction. The curable foamed resin is mixed with the fiber bundle group and the net. Spraying to together to attach the short fiber bundles attached to the long fiber bundles and nets, sufficiently impregnated with the foaming curing resin liquid to a long fiber reinforcement and short fiber reinforcement the Momihogushi long fiber reinforcement and short fiber reinforcement is not further guided in the molding passage, the manufacturing method of continuous fiber reinforced foamed molded, characterized in that molded to the cross-sectional shape of the molding passage foamed curable resin liquid in the molding passage is foamed cured.

Images