JPH0939159A - Composite molding - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make energy absorbing force larger than at joint parts so as to obtain excellent impact resistance by eliminating joints in the central part when ceramics having cross sections of bridge-like shapes are to be adhered and fixed on a surface of a molding having a curved face consisting of a highly strong fiber reinforced plastic. SOLUTION: When a composite molding is manufactured by arranging the specified number of bridge-type ceramics 1, the ceramics are arranged by avoiding occurrence of joints at the central part A of the molding so as to obtain a ceramic-ACM composite molding. In such a composite molding, comparing with a composite molding consisting of ceramics having joints in the central part, for example, after an object having a large impact force or a high speed flying object strikes against the central part, an area to be broken by the impact force can be reduced, peeling of an adhesive layer 2 of the ceramics 1 and the ACM 3 can be reduced, and further, the swelling of the back of the ACM can be reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ceramic having a curved high-strength fiber reinforced plastic (hereinafter referred to as "ACM"), a back surface having the same shape as the curved surface of ACM and a flat surface (hereinafter referred to as bridge type ceramics). ) Are arranged in combination in a predetermined number, and the seams of the ceramics are eliminated at the center of the molded product when bonding and fixing, so that even if the high-speed object comes in at the center, the flat surface of the ceramics Therefore, the present invention relates to a composite molded article in which ceramics are arranged so that the energy absorbing power becomes larger than that at the joint portion and the impact resistance is more excellent.

[0002]

2. Description of the Related Art It is a well-known fact today that a ceramic plate and an ACM plate can be bonded to each other to provide an impact resistance against an object falling from a high place or an object flying at high speed. Also, it has recently been performed abroad to bond a ceramic curved surface plate (usually a curved surface on both front and back sides, hereinafter referred to as Tyco type ceramics) and an ACM curved surface plate. However, in the case of a curved plate, the damage near the apex of the curved surface of the ceramic is large, and when a ceramic seam comes to the central part near the apex, when it is subjected to a very large impact, the damage to the ACM at the rear part of the composite molded product is also caused. A large phenomenon occurs in which the function as an impact resistant body deteriorates, and it is necessary to further improve this point.

[0003]

DISCLOSURE OF THE INVENTION According to the present invention, when arranging a predetermined number of ceramics of a predetermined shape in combination on an ACM curved plate, the molded product is relatively centered (a portion for receiving a high-speed flying object at a right angle). It was found that when there is a seam, the impact resistance decreases when a high-speed flying object collides with the seam, and as a result of various studies, it was confirmed that the ceramic seam does not come to the center of the molded product when arranging the ceramics. It was found that even if a high-speed flying object collides with the central part by doing so, an impact force almost equal to that of other parts can be obtained, and it was found that the cross-section of ceramics can be further increased. , Ceramic / ACM peeling reduction, AC
The present invention has led to the completion of a composite molded article that has extremely little bulging on the back surface of M and has excellent impact resistance.

[0004]

DISCLOSURE OF THE INVENTION The present invention is a cross-sectional bridge in which a curved surface-shaped molded article made of high-strength fiber reinforced plastic has the same back surface as the curved surface shape of the high-strength fiber reinforced plastic, and the surface is flat. The present invention relates to a composite molded article, characterized in that a predetermined number of ceramics are combined and arranged so that there is no seam of ceramics in the center of the molded article when arranging, bonding and fixing a predetermined number of ceramics in combination. Further, the present invention relates to a composite molded article characterized in that the surface shape of ceramics is a polygonal shape such as a square, a rectangle, a triangle, a hexagon, etc., and a predetermined number of such ceramics are arranged and arranged into a predetermined shape. Furthermore, the present invention relates to a composite molded article in which all ceramics are arranged in a puddle shape, and further to a predetermined quantity. Left and right shape after the sequence of ceramic or vertically, or horizontally, it relates to composite molding according to claim which is vertically both symmetrical shape.

Ceramics used here are mainly called fine ceramics, and there are alumina (purity 90 to 99.9), silicon nitride, silicon carbide, zirconia, etc., and they are not particularly limited. Also,
You may combine 1 type, or 2 or more types of such ceramics. As the physical properties of ceramics, the Vickers hardness is 1000 kg / mm2 or more, and the bending strength is 30 kgf.
/ Mm2 or more, and the elastic modulus of 2.8 x 104 kg / mm2 or more is preferable. As the shape of one piece of ceramic, first, the planar shape is a polygon such as a square, a rectangle, and a triangle, and the cross-sectional shape is a bridge shape as shown in FIG. In FIG. 1, (a) is a plan view and (b) is a front view. As a comparison of the shapes, a Tyco-shaped ceramic is shown in FIG.
Shown in (b).

On the other hand, as a high strength fiber used for ACM, the specific tensile strength obtained by dividing the tensile strength by the density is 10 × 10 8 cm.
Above, the specific elastic modulus obtained by dividing the elastic modulus by the density is 2.5 ×
It is over 10 8 cm. Specifically, it is a high-strength glass fiber, carbon fiber, aramid fiber, aromatic polyester fiber, high-strength polyethylene fiber, high-strength nylon fiber or the like. General glass fiber, nylon fiber and polyester fiber are not applicable. When a fiber having a specific tensile strength or a specific elastic modulus of not more than the above value is used, the impact resistance of the composite molded article is not always sufficient. On the other hand, as the resin for impregnating or coating these high-strength fibers, thermosetting resins include phenolic resins, epoxy resins, polyurethane resins, unsaturated polyester resins, vinyl ester resins and polyimide resins, and as thermoplastic resins, Polyolefins such as polyethylene and polypropylene, polyamides, polyesters, polyvinyl acetates, polyether sulfides, polyphenyl sulfides, polyethers, ether ketones, etc., as well as thermoplastic polyurethane, styrene, butadiene rubber, nitrile rubber, acrylonitrile styrene (AS) Examples thereof include resins, synthetic rubbers such as neoprene, and elastomers.

To obtain ACM, in the case of a thermosetting resin,
There are a compression molding method in which a high-strength fiber is impregnated or coated with a thermosetting resin to prepare a prepreg, and a plurality of the prepregs are stacked and heated and pressed, or a hand lay-up method in which the prepreg is not formed. The resin content can be in the range of 5 to 80% (weight%, the same applies hereinafter), but is usually 5 to
It is 50%, preferably 8 to 30%. On the other hand, in the case of a thermoplastic resin, a high-strength fiber and a sheet-shaped material such as a thermoplastic resin film or a woven fabric are alternately superposed on each other and compression-molded by heating and pressurizing the resin, or by melting the resin in advance. There is also a method of attaching to the high strength fiber. The thermoplastic resin content is also the same as that of the thermosetting resin.

As a method of fixing ceramics on the surface of the ACM obtained by the above method, as shown in FIG.
On the curved surface of the back surface of the ceramic and the front surface of the ACM,
It is desirable to use the resin itself used for ACM or a method of bonding with an adhesive such as synthetic rubber or epoxy resin.
Depending on the case, there is also a mechanical joining method using a port or a rivet. When a plurality of ceramics are arranged by adhesion, the gap between one piece and the adjacent piece is preferably small, and is preferably 0.3 mm or less in order to improve impact resistance. Moreover, it is better not to apply an adhesive to the contact surface between one piece and the adjacent piece. This is because a piece of ceramic is considerably destroyed when an impact is applied from the outside, but the destruction does not propagate to the adjacent ceramic. In order to further improve the impact resistance of the ceramic / ACM composite molded product thus obtained, there is also a method of further wrapping the composite molded product with ACM as in Japanese Patent Application No. 6-213000.

As described above, a predetermined number of bridge-type ceramics are arranged to make a composite molded article. In the present invention, as shown in FIGS. To form a composite of ceramics and ACM. Compared with a composite molded article made of ceramics having a seam in the central portion B, for example, when an object having a large impact force or a high-speed flying object collides with the central portion, the area destroyed by the impact force is reduced. At the same time, it is possible to reduce the peeling of the adhesive layer between the ceramics and the ACM and further reduce the bulge of the rear portion of the ACM. As shown in FIGS. 5 to 8, by arranging the ceramics in a puddle shape, even when an impact force is applied to the joint, unlike the case of the cross-cut shape as shown in FIG. , The ACM is not greatly damaged by the impact force. Further, as shown in FIGS. 5 to 8, it is important in terms of function and operability to have a symmetrical shape both vertically and horizontally or vertically and horizontally. Hereinafter, the present invention will be described with reference to the drawings.

[Brief description of drawings]

FIG. 1 is an example of a bridge-type ceramic of the present invention,
(A) is a plan view, (b) is a front view

FIG. 2 is an example of a conventional Tyco ceramics, (a)
Is a plan view, (b) is a front view

FIG. 3 is a sectional view of an example of a ceramics / ACM composite molded product of the present invention.

FIG. 4 is a sectional view of an example of a conventional ceramics / ACM composite molded product.

FIG. 5: Rectangular composite molding with ceramic plaid arrangement

FIG. 6 is a square-shaped composite composite having a ceramic plaid arrangement.

FIG. 7: Pedro array composite molded product in which one piece of ceramic is hexagonal

FIG. 8: Pedro array composite molding in which one piece of ceramic is triangular, square and rectangular

FIG. 9: Cross-cut composite molded article in which one piece of ceramic is square

FIG. 10: Pedro array composite molded product in which one piece of ceramic is square and rectangular

[Fig. 11] A composite molded product in which a ceramic piece is a square / rectangle / triangle mixed with a puddle arrangement and a grid arrangement.

[FIG. 12] Same as FIG. 14, except that an octagonal composite molded article

[Explanation of symbols]

1; Ceramics 2; Adhesive layer 3; ACM (a); Plan view (b); Front view A; Center of composite molded article (showing that there is no ceramic joint). B: Center of the composite molding (indicating that there is a ceramic seam).

Claims (4)

[Claims] 1. A curved shaped article made of high-strength fiber reinforced plastic, the back surface of which is matched with the same curved shape as that of high-strength fiber reinforced plastic, and a predetermined number of cross-section bridge-shaped ceramics whose surface is a flat surface are arranged. A composite molded article, characterized in that a predetermined number of ceramics are combined and arranged so that there is no seam of ceramics in the center of the molded article when they are bonded and fixed. 2. The surface shape of the ceramic is square,
The composite molded article according to claim 1, which is a polygon such as a rectangle, a triangle, or a hexagon. 3. The composite molded article according to claim 1, wherein a predetermined number of ceramics are all arranged in a puddle shape. 4. The composite molded product according to claim 1, 2 or 3, wherein a predetermined number of ceramics are arranged symmetrically on the left and right and / or the top and bottom.