JPS5951897B2 - Core material - Google Patents

Description

[Detailed description of the invention] The present invention provides base grooves on the front and back sides of the plate,
The intersection of the cut grooves on the back surface is inside the base grain on the front surface, and the intersection of the cut grooves on the front surface is inside the base grain on the back surface, and the two grooves communicate at the intersection. A core material characterized by the presence of

It is related to. To explain an embodiment of the present invention shown in the drawings, in the process of molding a non-hydrophilic synthetic resin (for example, urethane) into a plate shape, long glass fibers 1 are contained by spraying or the like, and the resin is foamed to form glass fibers. A reinforced synthetic resin (FRP) foam molded plate 2 is constructed.

Since the inside of this molded plate 2 contains glass fiber 1, it is hard but lacks elasticity and flexibility. In the present invention, the molded plate 2
Cut grooves 3 and 3' in the shape of a base plate are cut into the front and back surfaces of the molded plate 2 by a saw or the like, respectively, and the grooves 3 and 3' are opened in the wood end surface 2' of the molded plate 2. The intersection 4' of the cut grooves 3 on the back surface is located approximately at the center (inside) of the base grains on the front surface, and the intersection 4' of the cut grooves 3 on the front surface is located approximately at the center of the base grains on the back surface. Department (
inside). The groove 3 on the surface side thus formed
The space between the bottom surface 5 and the back surface and the groove 3' on the back side
The foam has a layer 6 of the glass fiber 1 in the space between the bottom surface 5' and the surface thereof, and the layer 6 extends to both sides of the grooves 3 and 3' to strengthen the space between the grooves 3 and 3'. The mutual intersection portions of both grooves 3 and 3' are communicated 7 with each other. Conventional FRP foam molded plates are light, but hard but lack elasticity and flexibility, making them difficult to use on curved surfaces, which has resulted in defects that make them difficult to use as linings or core materials for FRP ships.

Since the present invention is constructed as described above, when it is bent in an arc shape as shown in FIG. 4, the base grooves 3 on the front or back surface open and the same grooves 3' on the opposite side close.

And the space part, the part fits into the above-mentioned curvature, and the cut groove 3,
3' is in the shape of a base grain, and since the intersection 4 of one groove 3 is inside the base grain of the other groove 3', it is possible to bend diagonally in the direction of the base grain as shown in FIG. The core material of the present invention can be curved not only into a uniaxially curved surface (cylindrical surface) but also into a biaxially curved surface, that is, a spherical surface, and the outer layers 8, 8 made of synthetic resin or the like enter into the grooves 3, 3' on the front and back sides. The bond with the outer layers 8, 8 is strengthened, and the double-sided outer layers 8, 8 are integrally connected by the communication portion 7, so that it can be used as a strong curved core material for FRP ships and the like.

[Brief explanation of the drawing]

Figure 1 is a plan view showing the core material of the present invention, Figure 2 is Figure 1A
- Longitudinal sectional view taken along line A, Figure 3 is an enlarged view of Figure 2, Figure 4
The figure is a front view of the cylindrical curved state, Fig. 5 is a perspective view of the spherical curved state, Fig. 6 is a usage state diagram, Fig. 7 is a vertical cross-sectional view taken along line B-B in Fig. 1, and Fig. 8 is a core. FIG. 1... Glass fiber, 2... Board, 3
, 3'... Base groove, 4, 4'...
...Intersection, 7...Communication.

Claims (1)

[Claims] 1. Cut grooves 3, 3' in the form of a checkerboard are formed on the front and back sides of the plate 2, respectively, and the intersection 4' of the cut grooves 3' on the back side is inside the grid on the front side, and the cut grooves on the front side are A core material characterized in that an intersection 4 of the grooves 3 is located inside the grid pattern on the back surface, and both grooves 3 and 3' communicate with each other at the intersection.