JP4090917B2 - FRP grid manufacturing method - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an FRP grid manufacturing technique, and more particularly to an FRP grid manufacturing method for manufacturing an FRP grid of an arbitrary size without using a mold.
[0002]
[Prior art]
Conventionally, in the manufacture of FRP grids, the FRP grids are manufactured using a mold in which the shape and concavity and convexity of the FRP grids are reversed, that is, the shape of grid grooves. Moreover, the manufacture of the FRP lattice using a mold is generally performed by the following method.
First, the glass roving of the glass fiber bundle is passed through a container (funnel) containing a thermosetting resin so that the glass roving is impregnated with the thermosetting resin.
A glass roving impregnated with thermosetting resin is placed in the mold groove by hand. In this case, for example, the glass roving is first placed in the horizontal groove, and the glass roving is continuously placed in all the horizontal grooves while sequentially turning back to the adjacent horizontal groove at the end of the vertical groove. . Next, glass roving is placed in a vertical groove that is perpendicular to this, and the horizontal groove at the end of the glass roving is successively turned back to the adjacent vertical groove, and continuously into all the vertical grooves. Put the glass roving.
In this way, glass roving is alternately placed in the mold grooves in two orthogonal directions, and the process is repeated several times until the mold groove height is reached. Then, the cross section in the groove of the mold is finally filled without gaps with glass roving and thermosetting resin. In addition, because glass roving is repeated in the horizontal and vertical directions and placed in the lattice groove, there is a gap between the upper and lower glass rovings except at the intersection, but this gap has penetrated. Thermosetting resin enters.
The thermosetting resin is a liquid at a normal temperature, and is cured when a curing agent is placed in the liquid thermosetting resin. There are a normal temperature curing agent and a high temperature curing agent in the curing agent, and if the normal temperature curing agent is added to the thermosetting resin, it is cured in 30 to 60 minutes. If a high temperature curing agent is added to the thermosetting resin, it will not cure at room temperature, but will cure if the mold is heated to 80-100 ° C. Each company adopts either method.
[0003]
[Problems to be solved by the invention]
As described above, since the mold is used in the manufacture of the conventional FRP grid, it is impossible to manufacture the FRP grid having a size that does not exist in the mold. In addition, it is expensive to arrange a large number of molds so as to be compatible with all dimensions, and it is troublesome to store a large number of molds.
[0004]
In view of the above problems, the present invention has been devised to solve the problems. The object of the present invention is to manufacture FRP grids of any size without using a mold. An object of the present invention is to provide a method for manufacturing an FRP lattice.
[0005]
[Means for Solving the Problems]
In order to achieve the above object, the present invention attaches an edge frame on the bottom frame by enclosing it in a square shape at intervals corresponding to the outer edge size of the FRP grid, and a surface mat is formed of resin on the inner surface of the edge frame. 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 to which the surface mat is applied. Open and arrange horizontally and vertically to form lattice-like grooves between the middle dies arranged vertically and horizontally, then harden the glass chop mat to fix the middle dies and form the lattice-like grooves formed between the middle dies The glass roving in which the thermosetting resin has penetrated is placed in a conventional manner , that is, the glass roving is placed in a horizontal groove, and the vertical groove at the end of the glass roving is continuously folded back toward the adjacent horizontal groove. In all the horizontal grooves Next, place the glass rowing in the vertical groove, and then turn the horizontal groove at the end toward the adjacent vertical groove in succession in all the vertical grooves. Place the glass roving in this way, place the glass roving alternately in the two-way grooves formed vertically and horizontally between the middle mold and the middle mold, fill and cure, and after curing the edge It is manufactured by removing the frame and the bottom frame.
[0006]
Here, as a preferred embodiment, the middle mold is preferably arranged vertically and horizontally by using a punched-out measurement mold plate in which inner-shaped punching holes corresponding to the outer shape of the middle mold are formed in a grid pattern vertically and horizontally at a predetermined interval. . Further, the middle size is preferably made of a material made of FRP.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the present invention will be described more specifically based on the embodiments of the invention described in the drawings.
[0008]
In the figure, in the process of manufacturing the FRP grid 1 of any size without using a mold, the bottom frame 11 and the edge frame 12 constituting the outer mold frame, and the middle mold 13 that is a part of the FRP grid 1 are formed. used. In addition, a punched-out measurement template 14 is used to accurately arrange the middle mold 13.
[0009]
The bottom frame 11 is an outer frame in the case where the side forming the bottom surface of the FRP grid 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 grid 1 is formed, and is made of a plate-like member having a flat surface and a horizontally long surface.
[0010]
The edge frame 12 is used while standing vertically to 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 part outside the edge frame 12 and the surface of the bottom frame 11 outside the edge frame 12 so that the edge frame 12 falls down outward.
[0011]
The medium mold 13 becomes a part of the FRP grid 1 as it is after the FRP grid 1 is manufactured, and constitutes each grid portion of the FRP grid 1, and a square cylindrical pipe is used. As a 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 thickness is thin and the raw material is a long material, so the length can be set freely. There are also various types of square pipes. (B) It is not necessary to remove the middle mold 13 from the FRP grid 1 after molding, and the surface becomes clean.
[0013]
In addition to the FRP drawn material, the material of the middle mold 13 may be an extruded plastic material, a paper material, or a thin SUS material.
[0014]
As shown in FIG. 3, the punching type measurement template 14 is an instrument in which inner punching holes 14 a corresponding to the outer shape of the middle mold 13 are formed in a grid pattern at predetermined intervals, and by using this, The middle mold 13 can be arranged regularly and accurately. The punched-out measuring template 14 is a plate having a thickness of 3.2 mm, for example, and an inner punched hole 14a that matches the outer shape of the middle mold 13 is drilled precisely by, for example, laser processing.
[0015]
Next, a method for manufacturing an FRP lattice that does not use a mold will be described below.
As shown in FIG. 2 (A), the surface to the same height as the middle mold 13 arranged on the inner surface of the edge frame 12 attached to the surface of the bottom frame 11 in a square shape with a predetermined outer frame size. The mat 1a is coated with resin.
[0016]
Subsequently, as illustrated in FIG. 2B, one glass chop mat 1 b is applied to the entire surface of the bottom frame 11 and the edge frame 12.
[0017]
Arranging Place the medium-sized 13 vertically and horizontally on a glass chopped mat 1b formed in the above [0016] (see FIG. 1 (A) (B)) . In this case, the middle mold 13 is regularly and accurately arranged using the punched-out measurement template 14 shown in FIG. By arranging the middle molds 13 regularly and accurately in the vertical and horizontal directions, lattice-shaped grooves 1c are formed between the middle molds 13. Note that the resin applied to the glass chop mat 1b is not cured until all the middle molds 13 are arranged.
[0018]
If the hardening of the glass chop mat 1b is completed after the arrangement of the intermediate mold 13 is completed, the intermediate mold 13 is fixed at the position where the glass chop mat 1b is arranged, and the glass chop mat 1b and the intermediate mold 13 are integrated (see FIG. 2C). .
[0019]
The glass roving 1e in which the thermosetting resin 1d is soaked is placed in the lattice-shaped groove 1c formed between the middle mold 13 and the middle mold 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 the container (funnel) containing the thermosetting resin 1d, and the glass roving 1e is impregnated with the thermosetting resin 1d.
The glass roving 1e soaked with the thermosetting resin 1d is placed in a groove 1c formed vertically and horizontally between the middle mold 13 and the middle mold 13 by a human hand. In this case, for example, as shown in FIG. 4 (A), the glass roving 1e is first placed in the horizontal groove 1c, and the vertical groove 1c at the end thereof is continuously folded back toward the adjacent horizontal groove 1c. Then, glass roving is placed in all the lateral grooves 1c.
Next, as shown in FIG. 4B, this time, a glass roving 1e is placed in a vertical groove 1c perpendicular to the vertical groove 1c. The glass roving 1e is continuously placed in all the vertical grooves 1c while being sequentially turned toward.
Thus, the glass roving 1e is alternately placed in the two orthogonal grooves 1c formed vertically and horizontally between the middle mold 13 and the middle mold 13, and the process is repeated several times. Repeat until the height of the groove 1c. Then, the cross section in the groove 1c formed vertically and horizontally between the middle mold 13 and the middle mold 13 is finally filled with the glass roving 1e and the thermosetting resin 1d without any gap. Since the glass roving 1e is placed in the lattice groove 1c while repeating in the horizontal and vertical directions, there is a gap between the upper and lower glass rovings 1e except at the intersection, but in this gap The soaked thermosetting resin 1d enters (see FIG. 5).
The thermosetting resin 1d is a liquid in a normal temperature state, and is cured when a curing agent is placed in the liquid thermosetting resin 1d. The curing agent includes a room temperature curing agent and a high temperature curing agent. If the room temperature curing agent is added to the thermosetting resin 1d, it is cured in 30 to 60 minutes. In this invention, for example, a room temperature curing agent is used. A method of heating the bottom frame 11 or the like using a high-temperature curing agent may be used.
[0020]
The [0019] glass low Byi ring 1e and a thermosetting resin 1d filled in the groove 1c formed vertically and horizontally between the inner medium-sized 13 and medium 13 of the edge frame 12 is at room temperature or elevated temperatures Harden.
[0021]
When the curing is completed, as shown in FIG. 6, the peripheral edge frame 12 is tilted outward with the hinge 15 as a fulcrum. In this case, if a black skin product of SS400 is used as the material of the edge frame 12, the edge frame 12 is easily separated from the FRP lattice 1 manufactured between the bottom frame 11 and the edge frame 12.
[0022]
The bottom frame 11 is removed from the FRP grid 1 manufactured between the edge frame 12 and the bottom frame 11. In this case, if a black skin product of SS400 is used as the material of the bottom frame 11, the bottom frame 11 is easily separated from the FRP grid 1.
[0023]
As shown in FIG. 7A, the thickness t ₀ of the bottom surface of the manufactured FRP grid 1 is only about 0.5 mm at that stage, so that it is shown in FIG. As described above, the glass chop mat is post-coated on the back surface of the bottom surface of the FRP grid 1 until a predetermined thickness t is reached (glass chop mat post-coating portion 1f). If the bottom plate is not required only by the lattice, this thin layer can be scraped off by sanding to form a lattice of bottom plate holes.
[0024]
As a finish, in order to obtain the final required height h of the FRP grid 1 and to clean the surface, as shown in FIG. 8, the cutting portion 1g on the surface of the FRP grid 1 is sanded. And cut to complete.
[0025]
In this way, the FRP grid 1 having an arbitrary size can be manufactured without using a mold.
[0026]
The present invention is not limited to the embodiment of the invention described above, and various modifications can be made without departing from the spirit of the invention.
[0027]
【The invention's effect】
As apparent from the above description, according to the method for manufacturing an FRP grid according to the present invention, an FRP grid can be manufactured without using a mold, and an FRP grid of an arbitrary dimension, 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 suitable for the environment, for example, the size and the load resistance of the place where the FRP grid is installed, which has a very new beneficial effect.
[0028]
Further, as in claim 2, the middle mold is arranged vertically and horizontally by using the punched-out type measuring template in which the inner-shaped punching holes corresponding to the outer shape of the middle mold are formed in a grid shape vertically and horizontally at a predetermined interval. Can arrange the middle size regularly and accurately.
[0029]
Further, when the middle mold is made of an FRP material as in claim 3, it is not necessary to remove the middle mold from the FRP grid after manufacturing, and the surface finish is also beautiful.
[Brief description of the drawings]
FIG. 1 (A) shows an embodiment of the present invention, and is a plan view in which a middle mold is arranged vertically and horizontally inside a frame surrounded by an edge frame.
FIG. 2B is a cross-sectional view of FIG.
2A to 2C are work sequence diagrams according to the manufacturing method of the present invention. FIG.
FIG. 3 is a plan view of a punched-out measurement template used in the manufacturing method of the present invention.
FIGS. 4A and 4B are layout diagrams of glass roving in which a thermosetting resin has penetrated 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 an FRP lattice manufactured by the manufacturing method of the present invention.
FIG. 7A is a partial cross-sectional view of an FRP grid immediately after removal of an edge frame and a bottom frame of an FRP grid manufactured by the manufacturing method of the present invention.
(B) is a fragmentary sectional view of the FRP lattice after the glass chop mat post-coating of the FRP lattice manufactured by the manufacturing method of the present invention.
FIG. 8 is a partial cross-sectional view showing a cut portion of a surface at the time of finishing an FRP grid manufactured by the manufacturing method of the present invention.
FIG. 9 is a perspective view of an FRP lattice manufactured by the manufacturing method of the present invention.
DESCRIPTION OF SYMBOLS 1 FRP grating | lattice 1a Surface mat 1b Glass chop mat 1c Groove 1d Thermosetting resin 1e Glass roving 1f Glass chop mat back coating part 1g Cutting part 11 Bottom frame 12 Edge frame 13 Medium type 14 Punching type measurement template 14a Punching hole 15 hinge

Claims (3)

The edge frame is attached to the bottom frame in a square shape at intervals corresponding to the outer edge dimensions of the FRP grid, and the surface mat is coated with a resin to a predetermined height on the inner surface of the edge frame, and is surrounded by the edge frame. Medium size with a glass chop mat applied to the inner bottom frame surface and the inner surface of the edge frame coated with a surface mat, and a plurality of cylindrical rectangular medium molds arranged vertically and horizontally at predetermined intervals. After forming a grid-like groove between each other, the glass chop mat is cured to fix the middle mold, and a glass roving in which a thermosetting resin is soaked in the grid-like groove formed between the middle molds The conventional method , i.e., placing the glass roving in the horizontal groove, and continuously turning the glass roving in all the horizontal grooves while turning back to the adjacent horizontal groove at the longitudinal groove at the end of the glass roving. Next, this time Glass roving is placed in the groove, and the glass roving is placed in all the vertical grooves in succession while sequentially turning back to the adjacent vertical groove at the lateral groove at the end, like this, It is manufactured by placing glass roving alternately in two-way grooves formed vertically and horizontally between the middle mold and the middle mold, filling and curing, and removing the edge frame and bottom frame after curing. A manufacturing method of the FRP grid characterized.   The manufacture of an FRP grid according to claim 1, wherein the intermediate mold is arranged vertically and horizontally using an aperture type measuring template in which inner holes corresponding to the outer shape of the medium mold are formed in a grid pattern at predetermined intervals in the vertical and horizontal directions. Method.   2. The method for manufacturing an FRP lattice according to claim 1, wherein the middle mold is made of an FRP material.

Images