JPH02237885A - Method and device for manufacturing board for leisure - Google Patents

Abstract

PURPOSE:To improve strength by covering a board with a glass cloth coated with synthetic resin and surrounding the outer peripheral part of the glass cloth with the first pipe member and arranging the second pipe member along the surface and covering the pipe member with a sheet and making the whole pipe member into vacuum. CONSTITUTION:A board 10 is covered with a glass cloth 13 coated with synthetic resin. The board 10 is placed on a vinyl sheet 21, and the first annular pipe member 22 is installed so as to surround the board 10. A suction pipe 23 is connected at a proper position on the pipe member 22. The second pipe members 31-33 made of Cloth are installed inside the first pipe member 22, and connected with the pipe member 22. Covering by the upper side sheet is performed, and after the upper and lower sheets 21 are sealed with a sealing member 41 on the outer peripheral part of the annular pipe member 22, the sealed pipe members 22, 31-33 are made vacuum, and the air on the whole surface of the board 10 is removed from the cloth. Therefore, the glass cloth covering the board 10 is uniformly pressed, and the synthetic resin is allowed to permeate sufficiently, and strength can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a leisure board used, for example, as a surfboard or sailboard, and a method and apparatus for manufacturing this board.

[Conventional technology]

Conventionally, leisure boards have been made of fiber-reinforced plastic (hereinafter referred to as
A structure coated with a layer (called FRP) is known. A board having such a structure is made lighter by using expanded polystyrene, and is strengthened by covering the main body with an FRP layer. FRP
The layer is made of glass fiber cloth (glass cloth) impregnated with synthetic resin, and by coating the surface of the main body with glass cloth and applying liquid synthetic resin, and applying negative pressure from the outer periphery of the main body, It is molded by removing air and excess synthetic resin from the surface.

(Problems to be Solved by the Invention) However, in the conventional board, in the process of forming the FRP layer, negative pressure is applied from the outer periphery of the main body as described in Section 2, and at this time, negative pressure is applied along the outer periphery of the main body. As a result, the air in the center of the surface of the main body is difficult to remove, and at the center of the surface, the synthetic resin accumulates within the mesh of the glass cloth, and the fibers are not fully absorbed. The FRP layer exhibits high strength performance when the synthetic resin sufficiently penetrates into the glass fibers. If a large amount of adhesive is attached, problems arise in that the strength of the FRP layer cannot be sufficiently increased and it becomes heavy.

The present invention was made with the object of obtaining a leisure board that is lighter than conventional boards and has higher strength performance.

[Means for Solving the Problems] In the leisure board according to the first invention, the surface of the main body is covered with a fiber-reinforced plastic layer, and the fiber-reinforced plastic layer includes glass fibers so as to have substantially no mesh. U7 is characterized by being formed by infiltrating synthetic resin into glass cloth, which is made up of 6 strands in length and width.

The second invention promotes a method for manufacturing the leisure board described above, and this manufacturing method includes applying a synthetic resin to a glass cloth, and surrounding the glass cloth with a first annular pipe member. , a second tube member having an air passage on the outer side is disposed along the surface of the glass cloth, and an end of the second tube member is connected to the first tube member 6, and the surface and the first tube member are connected to each other. A pipe member and a second pipe member,
The first tube member is covered with a flexible sheet to maintain airtightness from the outside, and the first tube member is connected to a negative pressure source to suction and remove air and excess synthetic resin near the surface. There is.

A third invention provides an apparatus for manufacturing the leisure board described above, and this manufacturing apparatus includes a first annular pipe member surrounding a glass cloth coated with a synthetic resin, and an air passageway on the outer side. a second tube member disposed along the surface of the glass cloth and having an end connected to the first tube member; the surface, the first tube member and the second tube member; a flexible sheath that covers the member and seals it airtight from the outside; and a flexible sheath connected to the first pipe member; - A negative pressure source that sucks and removes air and excess synthetic resin near the surface described above.

[Effect]

The leisure board of the present invention has a thin FRP layer in which a synthetic resin is effectively infiltrated into glass cloth, and has no excess synthetic resin, so it is lightweight and has excellent strength.

In the manufacturing method and apparatus of the present invention, air and synthetic resin near the board surface are discharged from the board surface through the second pipe member and the first pipe member due to the negative pressure acting through the second pipe member. . Therefore, the synthetic resin sufficiently penetrates into the glass cloth over the entire board surface, and air and excess synthetic resin are completely removed from the surface.

〔Example〕

The present invention will be explained below with reference to illustrated embodiments.

FIG. 2 shows a cross section of the surfboard 10, in which the entire outer surface of the main body 11 made of expanded polystyrene is covered with an FRP layer 11. As will be described later, the FRP layer 12 is formed by impregnating glass cloth 6 with synthetic resin, and forming the zero body 11.
Keep the inside liquid-tight and shut off from the outside.

FIGS. 1(a) to 1(e) show an apparatus for manufacturing a surfboard 10. FIG.

The main body 11 is preformed in a conventionally known process, and the first
As shown in Fig. (a), the upper surface of the glass cloth 13 is coated with liquid synthetic resin.
covered by. The glass cloth 13 is formed by weaving thin strips made of glass fibers vertically and horizontally, and is shown in FIG.
) 6, the mesh 14 of the glass cloth 13 is filled with a synthetic resin 15 as shown in FIG. 3(a).

FIG. 1(b) shows the configuration of the lower part of the tear-making device of this embodiment.
An annular first tube member 22 is provided so as to surround the outer periphery of the tube member 22 . This first tube member 22 is formed by appropriately stretching a steel coil, and is fixed to the vinyl sheet 1-21F with adhesive tape or the like. First pipe member 22
A suction vibrator 23 made of synthetic resin is connected to appropriate locations (four locations in this embodiment), and this vibe 23 is fixed onto the vinyl sheet 21 with adhesive tape or the like. The vibrator 23 extends outward from the vinyl sheet 21 and is connected to a vacuum pump 24 (FIG. 1(e)). What? Although the first tube part shrine 22 is made of a coil in this embodiment, it may also be a vibrator made of synthetic resin, for example.

Inside the first tube member 22, second tube members 31, 32, 3
3 is provided. Since these second tube members are formed from fabric, as will be described below, they have multiple air passages on their outer sides.

The first tube member 22 extends along the outer peripheral edge of the surfboard 10. The second tube member 31 is arranged along the long axis of the ellipse, that is, along the longitudinal direction of the board 10, and both ends are connected to the first tube member 22. be done. On the other hand, the second
The tube members 32 extend across the second tube member 31, and both ends of each second tube member 32 are connected to the first tube member 22, respectively.

The second tube member 33 is connected to the first tube member 22 and is connected to the board 1
The pipe extends toward the second pipe member 31 disposed along the longitudinal direction of the pipe member 0, but is interrupted at a point C between the second pipe member 31 and the first pipe member 22. These second pipe members 31, 32
, 33 also includes adhesive tape, etc. Vinyl seams 1 and 21
fixed on top.

The structure of the second pipe members 31, 32, and 33 will be explained with reference to FIG. The second tube member is constructed by inserting a strip 39 made of felt into a pipe 38 made of cloth. strip 3
Reference numeral 9 is a reservoir for sucking and transporting liquid synthetic resin, and extends over the entire length of the pipe 38. Vibrator 3
8 is made of knitted fibers, so it has a large number of holes or air passages on the outside, which serve to remove air from the surface of the surfboard.

These second tube members are fixed onto the vinyl sheet 21 with their ends in contact with the side surfaces of the first tube member 22, as shown in FIG. 1(b).

Since the first tube member 21 is formed by stretching a coil, a gap is formed on the side surface of the first tube member 21.
and the interior of the second tube member communicate with each other. Similarly, the second tube member 32 is fixed on the vinyl sheet 21 with its end in contact with the side surface of the second tube member 3l, and since the second tube member 31 is made of cloth, The second tube members 31 and 32 also communicate with each other.

Further on the outer peripheral side M of the first tube member 22, a seal member 41 is provided. The seal member 41 is made of synthetic resin,
Surrounding the entire circumference of the first tube member 22, in the step shown in FIG.
32, 33, 34, and 35 are hermetically sealed from the outside.

When the setting of the device shown in Fig. 1(b) is completed,
Next, as shown in FIG. 1(c), the board 10 is placed inside the first tube member 22. Then, as shown in FIG. 1(d), a second pipe member 34 is placed on the upper surface of the board 10.
35 are arranged.

The second tube members 34 and 35 have the same configuration as the second tube members 31, 32, and 33. The second tube member 34 is arranged along the longitudinal center line of the board 10, and both ends thereof are connected to the first tube member 22 and the second tube member 31. Second pipe member 35
are arranged to intersect with the second pipe member 34. Both ends of each second pipe member 35 are connected to the first pipe member 22 and a second pipe member disposed below.
It is connected to the pipe member 32 or 33. These second tube members 34, 35 are attached to the board 10 by means of adhesive tags, etc.
and fixed on the vinyl sheet 21.

Next, as shown in FIG. 1(e), the board 10 and each pipe member 22, 3l, 32, 33, 34, 235 are
It is covered by flexible sheets 1 and 25. The vinyl sheets 1 and 25 are adhered to the sealing member 41, whereby the board 10 and each pipe member are hermetically sealed from the rows. Suction vibe 2
3 protrudes from between the vinyl seams 1 and 25 and is connected to the vacuum bomb 24 as described above.

When the vacuum pump 24 is driven in this state, the suction pipe 2
3, the inside of the seal member 41 becomes in a negative pressure state,
The vinyl sheets 21 and 25 contract like a vacuum bag and come into close contact with the surface of the board 100. At this time, since the second pipe members 31, 32, 33, 34, and 35 are stretched over the entire surface of the board 10, the air on the entire surface of the board 10 is absorbed by the second pipe members, the first pipe member 22, and The air is removed to the outside through the suction pipe 23, and air does not accumulate in the center of the surface of the void 100 as in the conventional case. In addition, the liquid synthetic resin that had adhered to the glass cloth penetrated into the glass fibers over the entire surface of the board 10, and the excess liquid synthetic resin M, the second pipe member 1, the first pipe member 22,
and is removed to the row section through the suction pipe 23. Since the entire surface of the board 10 is compressed by the vinyl sheets 21, 25, the gas → scross is pressed evenly over the entire surface, resulting in a negative The glass cloth 13 becomes even more flat than before the pressure is applied, and the wire mesh 4 is substantially eliminated.In addition, in this state, the synthetic resin has sufficiently penetrated into the glass cloth 13.

FIG. 5 shows the state of the second pipe members 31, 32, 33, 34, and 35 in the process of removing air and excess synthetic resin on the surface of the board jO by the action of negative pressure (FIG. 1(C)). Indicates the condition. These second tube members receive negative pressure and are pressed by the vinyl sheets 1, 21 and 25, so they become flat, and the inner circumferential surface of the vibrator 38 comes into close contact with the strip 39.

In this state, the air on the surface of the board 10 is
The synthetic resin is discharged to the outside through the holes in the fabric 8, and the synthetic resin flows to the outside through the strip 39.

After the step shown in FIG. 5(e), the vacuum bomb 24 is stopped, the upper vinyl sheets 1 and 25 and the second pipe member are removed, and the board IO is removed. Then, the room temperature is raised to an appropriate level and the FRP layer is dried.

Similarly, an FRP layer is formed on the opposite surface of the board 10, and a finishing process is performed to complete the surfboard.

As described above, according to this embodiment, it is possible to mold an FRP layer in which the synthetic resin is sufficiently permeated throughout.

Moreover, the glass fibers of this FRP layer have no mesh, are evenly permeated with synthetic resin, and do not contain unnecessary synthetic resin. Therefore, the board 10 is lighter and stronger than before, and its durability is improved. For example, a 2.8m surfboard conventionally weighs approximately 8.5 kg.
However, according to this example, it was about 6. Figure 6 shows another embodiment of this embodiment, in which seven FRP layers on the surface of the board are molded using a mold. In this figure, a lower mold 51 has four parts 52 for molding the FRP layer, glass cloth is laid in the recesses 52, and a liquid synthetic resin is applied to the four parts. An annular first tube member 22 is disposed around the four parts 52 and fixed onto the lower mold 5l with adhesive tape or the like. The suction vibrator 23 is connected to the first tube member 22, extends outside the lower mold 51, and is connected to a vacuum bomb (not shown). Part 4 5
2 extends in an elliptical shape along the shape of the surfboard, and the second tube member 3l is disposed along the longitudinal direction of the recess 52, and both ends thereof are connected to the first tube member 22, respectively. Also the second
The tube member 32 is arranged along a direction perpendicular to the second tube member 31.

One end of the second tube member 32 is connected to the second tube member 31, and the other end is connected to the first tube member 22.

When the setting is completed to the state shown in FIG. 6, a vinyl sheet is next placed. The outer periphery of the vinyl sheet is fixed to a sealing mechanism of a mold (not shown), thereby airtightly sealing off the space between the vinyl sheet and the lower mold 51 from the outside.

After that, the vacuum bomb is driven, and due to the action of negative pressure, F
Molding of the RP layer is performed. The operation in molding this FRP layer is similar to that of the first embodiment.

Next, the vinyl sheet and the second pipe member are removed,
The board body is housed within this FRP layer. and,
An adhesive is filled between the main body and the FRP layer.

It should be noted that although each of the above embodiments was related to the manufacture of surfboards, the same applies to sailboards as well.

Further, in each of the above embodiments, four suction vibrators 23 were provided, but this number is determined by the size of the board 10, and in the case of a small board, for example, one suction vibrator 23 is provided.
It may be a book or two.

[Effects of the Invention] As described above, according to the present invention, it is possible to obtain an I/jar board that is lightweight and has sufficient strength performance.

[Brief explanation of drawings]

FIG. 1(a) is a perspective view showing the main body of a board for one nodger, FIG. 1(b) is a perspective view showing the lower part of a manufacturing device according to an embodiment of the present invention, FIG. 1(c) Figures 1(b) and (c) are perspective views showing the state in which the leisure board is placed on the lower part of the manufacturing device. FIG. 1(e) is a perspective view showing the state in which the two pipe members are arranged; FIG. 1(e) is a perspective view showing the state in FIG. 1(d) with a vinyl sheet 1. The figure is a cross-sectional view showing an example of a board for leisure use, Figure 3 (a) is a cross-sectional view showing the glass cloth coated with liquid synthetic resin, and Figure 3 (b) is the glass cloth shown in Figure 3 (a). 4 is a perspective view showing the state of the second pipe member before use; FIG. 5 is a perspective view showing the state of use of the second pipe member; Fig. 6 is a perspective view showing the main parts of a manufacturing apparatus in another embodiment of the present invention.10... Board 11... Main body 12... Fiber reinforced plastic layer 13... Glass cloth 22... ...First pipe member 24...Vacuum bombs 31 to 35...Second pipe member Fig. 2 (a) (b) Fig. 3

Claims (3)

[Claims] (1) The surface of the main body is covered with a fiber-reinforced plastic layer, and this fiber-reinforced plastic layer infiltrates synthetic resin throughout the glass cloth made of glass fibers woven vertically and horizontally so that there is virtually no mesh. A leisure board characterized by being formed by (2) Applying a synthetic resin to a glass cloth, surrounding the glass cloth with a first annular tube member, and arranging a second tube member having an air passage on the outside along the surface of the glass cloth. At the same time, the end of the second tube member is connected to the first tube member, and the surface, the first tube member, and the second tube member are connected to each other.
The tube member is covered with a flexible sheet to maintain an airtight seal from the outside, and the first tube member is connected to a negative pressure source to suction and remove air and excess synthetic resin near the surface. A method for manufacturing a leisure board. (3) A first annular pipe member surrounding a glass cloth coated with a synthetic resin, having an air passageway on the outside thereof, and disposed along the surface of the glass cloth, and having an end portion connected to the first pipe member. a second tube member connected to the tube member; and the surface;
a flexible sheet that covers the first tube member and the second tube member and seals them airtight from the outside; and a negative sheet that is connected to the first tube member and sucks and removes air and excess synthetic resin near the surface A manufacturing device for a leisure board, comprising: a pressure source.