JP2004276453A - Method for manufacturing frp lattice - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a method for manufacturing an FRP lattice of an optional size without using a mold. <P>SOLUTION: A surface mat 1a is applied on the inside inner surface of an edge frame 12 to a prescribed height by a resin. A glass chop mat 1b is applied on the surface of an inside bottom frame 11 surrounded by the edge frame 12 and inner surface of the edge frame 12 on which the surface mat 1a is applied. Prismatic middle molds 13 are arranged horizontally at prescribed intervals. After a lattice-like channel 1c is formed between the middle molds 13, the glass chop mat 1b is cured to fix the middle molds 13. Glass roving 1e impregnated with a thermosetting resin 1d is packed in the lattice-like channel 1c formed between the middle molds 13 by a conventional method, and the resin is cured. After the curing, the edge frame 12 and the bottom frame 11 are removed. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a technique for manufacturing an FRP grid, and more particularly to a method of manufacturing an FRP grid for manufacturing an FRP grid of an arbitrary size without using a mold.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, in the manufacture of an FRP grid, a mold having an inverse shape of the FRP grid and irregularities, that is, a grid groove shape is used. Further, the production of an FRP lattice using a mold is generally performed by the following method.
First, a glass roving of a glass fiber bundle is passed through a container (a funnel) containing a thermosetting resin to impregnate the thermosetting resin into the glass roving.
The glass rowing impregnated with the thermosetting resin is manually placed in the mold groove. In this case, for example, the glass rowing is first placed in the horizontal groove, and the glass rowing is placed in all the horizontal grooves continuously while sequentially turning back to the adjacent horizontal groove at the longitudinal groove at the end. . Next, put glass roving in the vertical flute which is perpendicular to this, and turn it back to the next vertical flute in the horizontal flute at the end of the glass roving. Leave the glass rowing.
In this way, the glass roving is alternately placed in the mold grooves in two orthogonal directions, and the process is repeated several times until the height of the mold grooves is reached. Then, the cross section inside the groove of the mold is finally filled without gaps with the glass roving and the thermosetting resin. In addition, since the glass rowing is repeated in the horizontal and vertical directions and placed in the lattice groove, there is a gap between the upper and lower glass rowings except at the intersection, but it penetrated into this gap Thermosetting resin enters.
The thermosetting resin is a liquid at a normal temperature state, and is cured by adding a curing agent into the liquid thermosetting resin. The curing agent includes a room temperature curing agent and a high temperature curing agent. When the room temperature curing agent is added to the thermosetting resin, the resin cures in 30 to 60 minutes. If a high-temperature curing agent is added to the thermosetting resin, the resin does not cure at room temperature, but cures when the mold is heated to 80 to 100 ° C. Each company adopts either method.
[0003]
[Problems to be solved by the invention]
As described above, since a mold is used in the production of the conventional FRP lattice, an FRP lattice having dimensions not available in the mold cannot be produced. In addition, it is costly to prepare a large number of dies so as to correspond to all dimensions, and it is troublesome to store a large number of dies.
[0004]
SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and has been made in order to solve the problems. An object of the present invention is to manufacture an FRP lattice having an arbitrary size without using a mold. An object of the present invention is to provide a method of manufacturing a lattice made of FRP.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention relates to a method in which an edge frame is mounted on a bottom frame in a rectangular shape at an interval corresponding to an outer edge dimension of a grid made of FRP, and a surface mat is made of resin on an inner surface inside the edge frame. A predetermined height is applied, a glass chop mat is applied to the surface of the inner bottom frame surrounded by the edge frame and the inner surface of the edge frame coated with the surface mat, and a plurality of medium-sized cylindrical prisms are spaced at predetermined intervals. After opening and arranging vertically and horizontally, after forming lattice-shaped grooves between the middle dies arranged vertically and horizontally, the glass chop mat is cured and the middle dies are fixed, and lattice-shaped grooves formed between the middle dies It is manufactured by filling and curing a glass roving having a thermosetting resin impregnated therein by a conventional method, and removing the edge frame and the bottom frame after the curing.
[0006]
Here, as a preferred embodiment, the medium size is preferably arranged vertically and horizontally by using a hole-type measurement template in which inner holes corresponding to the outer shape of the medium size are formed in a grid pattern at predetermined intervals in the vertical and horizontal directions. . Also, the middle mold is preferably made of a material made of FRP.
[0007]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, the present invention will be described more specifically based on embodiments of the invention illustrated in the drawings.
[0008]
In the figure, in the step of manufacturing the FRP lattice 1 of an arbitrary size without using a mold, the bottom frame 11 and the edge frame 12 constituting the outer mold frame, and the middle mold 13 which is a part of the FRP lattice 1 are formed. used. In order to accurately arrange the middle mold 13, a punching measurement template 14 is used.
[0009]
The bottom frame 11 is an outer frame in the case where the side forming the bottom surface of the FRP lattice 1 is formed, and is made of a flat plate-like member having a flat surface. The edge frame 12 is an outer frame in the case where the side forming the outer peripheral edge of the FRP lattice 1 is formed, and is made of a plate-like member having a flat surface and a horizontally long shape.
[0010]
The edge frame 12 is used upright on the bottom frame 11, and the edge frame 12 and the bottom frame 11 are connected by a hinge 15. The hinge 15 is attached between the lower portion outside the edge frame 12 and the surface of the bottom frame 11 outside the edge frame 12 such that the edge frame 12 falls outward.
[0011]
The middle mold 13 becomes a part of the FRP lattice 1 as it is after the production of the FRP lattice 1 and constitutes each lattice portion of the FRP lattice 1, and a square tubular pipe is used. As the material of the middle mold 13, an FRP drawn square pipe material is mainly used.
[0012]
The advantage of using this is that (a) the length can be freely set because the thickness is thin and the raw material is long. There are also various types of square pipes. (B) There is no need to remove the middle mold 13 from the FRP lattice 1 after molding, and the surface becomes clean.
[0013]
In addition to the FRP drawn material, an extruded plastic material, a paper material, and a thin-walled SUS material may be used as the material of the middle mold 13.
[0014]
As shown in FIG. 3, the punching-out measurement template 14 is an instrument in which inner punching holes 14 a corresponding to the outer shape of the middle die 13 are formed in a grid pattern at predetermined intervals vertically and horizontally. The medium size 13 can be arranged regularly and accurately. The punching type measurement die plate 14 is, for example, a rectangular plate having a plate thickness of 3.2 mm, and an internal punching hole 14a corresponding to the outer shape of the middle die 13 is precisely drilled by, for example, laser processing.
[0015]
Next, a method of manufacturing a grid made of FRP without using a mold will be described below.
As shown in FIG. 2A, the surface of the bottom frame 11 is mounted on the inner surface of the edge frame 12 attached to the surface of the bottom frame 11 in a rectangular shape with a predetermined outer frame size up to the same height as the middle mold 13 to be arranged. The mat 1a is applied with a resin.
[0016]
Subsequently, as shown in FIG. 2B, one glass chop mat 1b is applied to the entire surface of the bottom frame 11 and the edge frame 12.
[0017]
The middle dies 13 are arranged vertically and horizontally on the glass chop mat 1b formed in the above [0016] (see FIGS. 1A and 1B). In this case, the middle mold 13 is regularly and accurately arranged by using the punching-out measurement template 14 shown in FIG. By arranging the middle dies 13 regularly and accurately in the vertical and horizontal directions, lattice-shaped grooves 1c are formed between the middle dies 13. Until the placement of all the middle dies 13 is completed, the resin applied to the glass chop mat 1b is prevented from being cured.
[0018]
When the hardening of the glass chop mat 1b is completed after the arrangement of the middle mold 13 is completed, the middle mold 13 is fixed at the arranged position, and the glass chop mat 1b and the middle mold 13 are integrated (see FIG. 2C). .
[0019]
The glass roving 1e impregnated with the thermosetting resin 1d is placed in the lattice-like grooves 1c formed between the middle molds 13 in the same manner as when a conventional mold is used. .
That is, first, the glass roving 1e of the glass fiber bundle is passed through a container (a funnel) containing the thermosetting resin 1d, and the thermosetting resin 1d is impregnated into the glass roving 1e.
The glass rowing 1e impregnated with the thermosetting resin 1d is manually placed in a groove 1c formed vertically and horizontally between the middle dies 13 by hand. In this case, for example, as shown in FIG. 4 (A), the glass rowing 1e is first placed in the lateral groove 1c, and is successively folded back toward the adjacent lateral groove 1c at the longitudinal groove 1c at the end thereof. Then, glass rowing is placed in all the lateral grooves 1c.
Next, as shown in FIG. 4 (B), a glass roving 1e is placed in a vertical groove 1c which is perpendicular to the vertical groove 1c. The glass rovings 1e are successively placed in all the vertical grooves 1c while sequentially turning back toward.
In this manner, the glass rovings 1e are alternately placed in the two orthogonal grooves 1c formed vertically and horizontally between the middle dies 13 and the process is repeated several times to form the middle dies 13. Repeat until the height of the groove 1c. Then, the cross section inside the groove 1c formed vertically and horizontally between the middle dies 13 is finally filled with the glass roving 1e and the thermosetting resin 1d without gaps. In addition, since the glass rowing 1e is placed in the lattice groove 1c while repeating the horizontal and vertical directions, a gap is formed between the upper and lower glass rowing 1e except at the intersection, but this gap is formed. The penetrated thermosetting resin 1d enters (see FIG. 5).
The thermosetting resin 1d is a liquid at a normal temperature state, and is cured when a curing agent is put into the liquid thermosetting resin 1d. The curing agent includes a room temperature curing agent and a high temperature curing agent. When the room temperature curing agent is added to the thermosetting resin 1d, it cures in 30 minutes to 60 minutes. In the present invention, for example, a room temperature curing agent is used. A method of heating the bottom frame 11 and the like using a high-temperature curing agent may be adopted.
[0020]
The glass roving 1e and the thermosetting resin 1d filled in the grooves 1c formed vertically and horizontally between the middle dies 13 inside the edge frame 12 of the above [0019] and the middle dies 13 are at room temperature or high temperature. To cure.
[0021]
When the curing is completed, as shown in FIG. 6, the peripheral edge frame 12 is turned outward with the hinge 15 as a fulcrum. In this case, if a black scale product of SS400 is used as the material of the edge frame 12, the edge frame 12 easily separates from the FRP grid 1 manufactured between the bottom frame 11 and the edge frame 12.
[0022]
The bottom frame 11 is removed from the FRP lattice 1 manufactured between the edge frame 12 and the bottom frame 11. In this case, if a black scale product of SS400 is used as the material of the bottom frame 11, the bottom frame 11 is easily separated from the FRP lattice 1.
[0023]
As shown in FIG. 7 (A), the thickness _{t 0} of the bottom surface of the FRP grating 1 is manufactured, because there is only 0.5mm position in that stage, to require dimensions, in FIG. 7 (B) As shown in the figure, a glass chop mat is post-coated on the back surface of the bottom surface of the FRP lattice 1 until a predetermined thickness t is reached (glass chop mat post-coating portion 1f). When only the lattice does not require a bottom plate, this thin layer can be removed by sanding to form a lattice of bottom plate holes.
[0024]
As a finish, as shown in FIG. 8, a cut portion 1 g of the surface of the FRP grid 1 is sanded so as to have a final required height h of the FRP grid 1 and to clean the surface. And cut to complete.
[0025]
In this way, it is possible to manufacture the FRP lattice 1 having an arbitrary size without using a mold.
[0026]
It should be noted that the present invention is not limited to the above embodiment of the present invention, and it is needless to say that various modifications can be made without departing from the spirit of the present invention.
[0027]
【The invention's effect】
As is clear from the above description, according to the method of manufacturing the FRP grid according to the present invention, the FRP grid can be manufactured without using a mold, and the FRP grid of an arbitrary size, that is, the size of the grid, It is possible to manufacture an FRP lattice in which the thickness and height of each lattice, the thickness of the bottom surface, and the like are freely changed. As a result, it is possible to easily produce a product that is suitable for the environment where the FRP lattice is installed, for example, in size and load resistance.
[0028]
Further, in the case where the middle mold is arranged vertically and horizontally by using a hole-measurement mold plate in which the inner mold holes corresponding to the outer shape of the middle mold are formed in a grid pattern at predetermined intervals in the vertical and horizontal directions. Can place the medium size regularly and accurately.
[0029]
Further, when the middle mold is made of a material made of FRP as in claim 3, it is not necessary to remove the middle mold from the FRP lattice after the manufacture, and the surface finish becomes fine.
[Brief description of the drawings]
FIG. 1A shows an embodiment of the present invention, and is a plan view in which a middle size is arranged vertically and horizontally inside a bottom frame surrounded by an edge frame. FIG. 1B is a cross-sectional view of FIG.
FIGS. 2A to 2C are work sequence diagrams according to the manufacturing method of the present invention.
FIG. 3 is a plan view of a punching type measurement template used in the manufacturing method of the present invention.
4 (A) and 4 (B) are views showing how to arrange a glass roving impregnated with a thermosetting resin into a groove according to the manufacturing method of the present invention.
FIG. 5 is a cross-sectional view showing a laminated state of glass roving in which a thermosetting resin has penetrated into a groove.
FIG. 6 is a cross-sectional view showing removal of an edge frame of the FRP lattice manufactured by the manufacturing method of the present invention.
FIG. 7A is a partial cross-sectional view of the FRP grid immediately after removal of an edge frame and a bottom frame of the FRP grid manufactured by the manufacturing method of the present invention. (B) is a partial cross-sectional view of the FRP grating after the glass chop mat of the FRP grating manufactured by the manufacturing method of the present invention is applied.
FIG. 8 is a partial cross-sectional view showing a cut portion of the surface at the time of finishing the FRP lattice manufactured by the manufacturing method of the present invention.
FIG. 9 is a perspective view of an FRP grating manufactured by the manufacturing method of the present invention.
Reference Signs List 1 FRP lattice 1a Surface mat 1b Glass chop mat 1c Groove 1d Thermosetting resin 1e Glass roving 1f Glass chop mat post-coating section 1g Cutting section 11 Bottom frame 12 Edge frame 13 Medium size 14 Drilling measurement plate 14a Drilling hole 15 hinge

Claims (3)

An edge frame was attached on the bottom frame in a rectangular shape at an interval corresponding to the outer edge size of the FRP lattice, and a surface mat was applied to the inner surface of the edge frame with a resin at a predetermined height and surrounded by the edge frame. A glass chop mat is applied to the surface of the inner bottom frame and the inner surface of the edge frame coated with the surface mat, and a plurality of cylindrical squares are arranged vertically and horizontally at predetermined intervals, and are arranged vertically and horizontally. After forming a grid-like groove between them, the glass chopping mat is cured to fix the middle mold, and glass roving in which the thermosetting resin penetrates into the lattice-like groove formed between the middle molds A method for producing a grid made of FRP, characterized in that it is manufactured by filling and curing a conventional method, and removing the edge frame and the bottom frame after the curing. 2. The production of the FRP grid according to claim 1, wherein the medium-sized die is arranged vertically and horizontally by using a punching-out measurement template in which inner-shaped holes corresponding to the outer shape of the medium are formed in a grid at predetermined intervals. Method. The method for manufacturing an FRP lattice according to claim 1, wherein the middle mold is made of an FRP material.

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