JPH01209084A - Injection ski plate and manufacture - Google Patents

Abstract

PURPOSE:To eliminate a core material dislocation at the time of injecting a resin by fixing a wooden core material buried in a foaming resin by means of an edge metal fitting to have a click part to abut at the side surface. CONSTITUTION:In a lower mold 3 lower part, lower surface composing members 12 and 13 and an edge mold 11 are arranged. On the lower surface composing members 11 and 12, a wooden core material 1 equipped with a projection 2 to be projected in a prescribed length from upper and lower surfaces is arranged. To the edge mold 11, a click part 11a to abut at the side surface of the wooden core material 1 is provided, and the wooden core material 1 can be fix-locked by the click part. An upper surface composing member 14 is pressed by an upper mold 4, and the wooden core material 1 is sandwich-pressed through the projection 2 by lower surface composing members 14 and 10 in a gap. To the gap, a foaming resin 7 is injected and molded. At such a time, since the wooden core metal 1 is fixed by the edge metal fitting 11, it can be prevented from being moved forward and backward by a flow at the time of injecting the resin 7, and it is buried in a normal position.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an injection ski in which a wooden core is embedded and a method for manufacturing the same.

(Prior Art) Various materials are used for skis, such as wood, metal, and resin. Among these, wood is lightweight and has excellent properties such as flexibility, and is difficult to discard as a material for skis. However, skis made solely of wood have low strength and are poor in durability, with edge fittings easily rusting due to water absorption.

Furthermore, among skis made of resin, there is an injection ski in which foamable resin is injected into the gap between the upper and lower surface components of the ski. Although this injection ski has the advantage of being relatively easy to manufacture, it has problems such as poor rigidity, which requires measures such as embedding reinforcing material such as FRP.

In general, wood and resin have extremely low adhesion properties, so they have not been put into practical use as skis, but the inventor has diligently studied the adhesion of wood and resin, and developed an injection method that uses a combination of wood and resin. A method for manufacturing skis was shown in Japanese Patent Application No. 71221/1983.

The injection ski shown here is made by applying a rubber primer to the surface of the wooden core material 1 and injecting many resin pins 2 on the top and bottom surfaces of the wooden core material 1, as shown in Figure 5. The vertical core material is placed in a lower mold 3 and an upper mold 4 together with a lower surface component 5 and an upper surface component 6 of the ski, and is integrally molded by filling with foamable resin 7. . In this injection ski manufacturing method, as shown in FIG. The core material 1 is held so as not to move due to the injection of the foamable resin 7.

(Problems to be Solved by the Invention) The method for manufacturing injection skis described above has the advantage of being able to provide high-quality skis that have both the characteristics of wood and resin.

However, as mentioned above, although the core material is supported so as not to move when the foamable resin 7 is injected, when the foamable resin 7 is injected, the wooden core material 1 moves back and forth due to the flow of the resin. However, a problem has arisen in that the mold may be buried and molded in a position displaced from the normal position.

Therefore, the present invention was made to solve this problem, and its purpose is to be able to reliably bury the wooden core material in the correct position, and to combine the characteristics of wood and resin. The object of the present invention is to provide a method for manufacturing an injection ski that can produce skis with excellent properties, and an injection ski obtained by this manufacturing method.

(Means for solving problems) The present invention has the following configuration to achieve the above object.

That is, in an injection ski made by injecting and filling a foamable resin into the gap between a lower surface component and an upper surface component of the ski, the foamable resin contains a wooden material whose entire circumference is surrounded by the foamable resin. It is characterized in that the core material is buried and the wooden core material is supported and tied together by an edge metal fitting having a claw part that comes into contact with the side surface of the wooden core material, and when manufacturing injection skis. A lower surface component such as an edge fitting and a sliding surface material is arranged in the lower part of the lower mold, and a projection is provided on this lower surface component to protrude to a predetermined length from the upper and lower surfaces, and is impregnated with resin liquid. At the same time, a wooden core material whose surface has been coated with a primer is arranged so that the side surface is locked to the vertical claws protruding from the edge metal fitting, and the upper surface component is horizontally suspended between the upper parts of both side walls of the lower mold. , the upper surface component is pressed between the upper surface component and the lower mold, the upper surface component and the lower surface component are held together under pressure via the projection, and the edge metal fitting is pressed between the upper surface component and the lower surface component. It is characterized by holding the wooden core material through the upper claws and injecting and filling the gap between the upper surface component and the lower surface component with foamable resin.

(Embodiments) Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

FIG. 1 is an explanatory diagram showing an example of the method for manufacturing an injection ski according to the present invention, and shows a wooden core material 1 serving as the center of the ski, a lower surface component 10, and an upper surface component 14.
into the cavities in the lower mold 3 and upper mold 4,
A state filled with foamable resin 7 is shown.

In the figure, the wooden core material 1, which is buried as the core material of skis, is made by cutting plywood with wood chips pasted together.
As shown in the figure, the shape is shaped to match the shape of the core of the ski, i.e., the center part where the ski fasteners are attached is thicker, and the parts corresponding to the top and tail of the ski are thinner. be done.

The tip edge 1a of the wooden core material 1 is formed into an arcuate curved shape, and is tapered so as to gradually become thinner toward the tip. Further, the wooden core material 1 is formed with a side curve in the width direction, and the wooden core material 1 is formed into a curved surface such that the tip side of the wooden core material 1 is narrower and the central portion 1b is slightly wider.

Further, the wooden core material 1 is impregnated with epoxy resin, and after the surface is roughened with sandpaper or the like, a rubber-based primer is applied.

A large number of resin pins 2 protruding from the upper and lower surfaces of the wooden core material 1 at a predetermined length are planted in this wooden core material 1. This pin 2 forms a space into which foamed resin can be injected and filled when the wooden core material 1 is placed in a mold. Of course, wooden core material 1
When the wooden core material 1 is incorporated into the mold, the thickness and width of
Set so that a space that can be filled with foamed resin is formed.

In FIG. 1, the lower surface component 10 includes an edge fitting 11, a mesh reinforcing material 12, and a sliding surface material 13.

The edge fittings 11 are embedded on both sides of the wooden core material 1, and as shown in FIG. 1
1a is provided. As shown in FIG. 1, the prongs 11a are set so as to come into contact with and bite into the lower edge of the side surface of the wooden core 1 when the wooden core 1 is assembled into the mold. In addition,
A through hole 11b is provided in the claw portion of the edge fitting 11 to enhance bondability with the foamable resin 7. In addition, the above-mentioned vertical claw 1
1a may be provided separately without being cut up from the edge fitting 11.

Further, in FIG. 1, the upper surface component 14 is formed by laminating a surface material 15, a mesh reinforcing material 16, a reinforcing plate 17, and a mesh reinforcing material 18. The mesh reinforcing materials 16 and 18 and the mesh reinforcing material 12 in the lower surface component 10 are made of FR impregnated with epoxy resin.
A braided material made of P tape or the like and FRP string or the like is used. Therefore, the foamable resin described later penetrates into this mesh reinforcing material, and the surrounding ski components are fixed and integrated.

The surface material 15 is a resin plate such as ABS or F on the lower surface of the resin plate.
Use RP boards that have been glued together in advance.

On the other hand, the reinforcing plate 1 sandwiched between the mesh reinforcing members 16 and 18
The width of 7 is narrower than the width of the four-part space of the lower mold 3. The reinforcing plate 17 is arranged at least in the fastener attachment range, and is placed in the tail direction or in the direction of
Extended in the direction of the knob.

Although a resin plate may be used as the material for the reinforcing plate 17, a metal plate is mainly used from the viewpoint of strength. In addition, the reinforcing plate 17
A through hole is provided to penetrate the foamable resin. Further, if necessary, a projection is provided on the upper surface of the reinforcing plate 17 together with the through hole by pressing or the like.

When manufacturing an injection ski from each of the above-mentioned ski aging components, first, a lower surface component 10 consisting of an edge fitting 11, a mesh reinforcing material 12, and a sliding surface material 13 is placed in the lower part of the lower mold 3, Next, the wooden core material 1 is positioned and placed at a predetermined position on the lower surface component 10. At this time,
Since the pin 2 protrudes from the lower surface of the wooden core 1, a certain space is formed between the lower surface component 10 and the wooden core 1. Further, the side surface of the wooden core material 1 is supported by the protruding claws 11a of the edge fittings 11 coming into contact with it.

Next, the upper surface component 14 is placed horizontally between the upper surfaces of both side walls of the lower mold 3, and the upper surface component 14 is pressed between the upper mold 4 and the lower mold 3, as shown in FIG. Then, reinforcing plate 1
Since the width of 7 is narrower than the width of the recessed space of the lower mold 3,
It is pushed down into the lower mold 3 along with the lowermost layer mesh reinforcing material 18 by the thickness thereof. Therefore, the upper surface component 14
Both ends of the mesh reinforcing members 16 to 18 in the width direction and both ends of the surface material 15 in the width direction are held under pressure between the upper surface of the side wall of the lower mold 3 and the lower surface of the upper mold 4, and the reinforcing plate 17 is pushed down into the lower mold 3 by its thickness as described above, and at the same time, the mesh reinforcing material 18 is pushed down into a dish-like shape with a shallow central portion.

By pushing down the reinforcing plate 17 and the mesh reinforcing material 18 in this way, the mesh reinforcing material 18 comes into strong contact with the pin 2 protruding from the top surface of the wooden core material 1, and at the same time, is cut and raised from the edge fitting 11. The side surface of the wooden core material 1 is locked to the vertical claws 11a. That is, the wooden core material 1 is the pin 2
It is positioned and held within the mold via the edge fittings 11. The protruding length of the pin 2 is such that the wooden core 1 is extended by the pin 2 by the upper and lower surface constituent members 10.14 as described above.
It is set to be compressed through.

Note that since the upper surface component 14 is supported from below by the pin 2, it does not hang down into the lower mold 3. Since the reinforcing plate 17 is also pinched by the mesh reinforcing members 1G and 18 from above and below, it is reliably held at a predetermined position within the lower mold 3.

After each component of the ski is arranged as described above, the foamable resin 7 is injected and filled into the mold interior space from the 1-tube side of the wooden core material 1 toward the till side by a conventional method. This results in
Each ski component is bonded and integrated with foamed resin 7.

As mentioned above, the reason why the resin is injected from the top side of the wooden core material 1 is that the top side of the wooden core material 1 is thin and rounded, which allows the resin to flow well and ensure resin filling. In addition, since the wooden core material 1 is provided with a side curve L so that the area near the fastener attachment part is wide, the prongs 11a are inserted into the wooden core material 1, and the resin pressure and foaming pressure of the injected resin cause the wooden core material 1 to This is to hold the core material 1 so that it does not shift. In addition, by providing the edge fittings 11 with alternately cut and raised prongs 11a, it also has the effect of increasing the binding between the foamable resin 7, the lower surface component IQ, and the wooden core material 1.

The molded product thus obtained is taken out of the mold and finished to remove the protruding portions of both the mesh reinforcing materials 16 and 18 constituting the upper surface component 14 and the surface material 15, thereby producing the desired injection ski. Obtainable. The injection ski thus obtained has a wooden core material 1 embedded therein, a sliding surface material 13 and an edge fitting 11 on the lower surface, and a surface material 15 exposed on the upper surface.

The bonding strength between the wooden core material 1 and the foamable resin 7 was sufficiently satisfactory. This is because the bond between the epoxy resin impregnated into the wooden core material 1 and the rubber-based primer is strong, and the bond between the rubber-based primer and the foamable resin 7 is strong.

Note that the reinforcing plate 17 in the above embodiment mainly functions as reinforcement when fastening the fastener fixing screw. However, in the present invention, the reinforcing plate 17 does not necessarily need to be provided.

In this case, the pin 2 may be formed slightly longer and the wooden core material 1 may be held under pressure by the upper and lower surface constituent members 10.14.

In addition, as shown in FIG. 4, the wooden core material 1 may be impregnated with an epoxy resin in advance and hardened, and then the surface thereof is covered with a reinforcing resin 20 such as FRP. By covering the wooden core material with the reinforced resin 20 in this manner, there is an advantage that the strength of the wooden core material 1 can be adjusted.

Further, the wooden core material 1 may be processed such as providing grooves on the side surface or providing protrusions on the upper and lower surfaces to increase the bonding area with the foamable resin and improve adhesiveness.

The present invention has been variously explained above using preferred embodiments, but the present invention is not limited to these embodiments.
Of course, many modifications can be made without departing from the spirit of the invention.

(Effects of the Invention) According to the present invention, as described above, by embedding the wooden core material in the foamed resin, it is possible to provide a high-quality ski that has both the characteristics of wood and resin. . especially,
By adjusting the amount of resin and the amount of wood, the design of various characteristics of the ski such as weight and rigidity can be easily changed. Also,
Since the wooden core material is completely submerged in the foamed resin, water does not penetrate into the wooden core material, resulting in excellent durability.

Further, according to the injection ski manufacturing method of the present invention, the wooden core material is held under pressure by the upper and lower surface components through the pins, and the side surfaces of the wooden core material are locked by the edge fittings having the prongs. This prevents the wooden core material from shifting due to the resin pressure and foaming pressure when the foamable resin is injected. Further, it has remarkable effects such as being able to increase the bonding strength between the wooden core material and the foamable resin.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing an example of the method for manufacturing an injection ski according to the present invention, FIG. 2 is a perspective view of a wooden core material,
FIG. 3 is a perspective view of the edge fitting, FIG. 4 is a sectional view showing another embodiment of the wooden core material, and FIG. 5 is an explanatory view showing a conventional manufacturing method. DESCRIPTION OF SYMBOLS 1... Wooden core material, 2... Pin, 3... Lower mold, 4... Upper mold, 7... Foaming resin, 10... Lower surface component, 11
-... Edge metal fittings, lla... Standing claws, 12.16
．． 18...Mesh reinforcement material, 13...Sliding surface material, 14...Top surface component, 15
... Surface material, 17 ... Reinforcement plate. Figure 1

Claims (1)

[Scope of Claims] 1. An injection ski in which a foamable resin is injected into a gap between a lower surface component and an upper surface component of the ski, wherein the entire circumferential surface of the foamed resin is injected into the foamed resin. An injection ski characterized in that a wooden core surrounded by is embedded, and the wooden core is supported and tied together by an edge metal fitting having a claw part that comes into contact with the side surface of the wooden core. Board. 2. Lower surface components such as edge fittings and sliding surface materials are placed in the lower part of the lower mold, and on these lower surface components are provided protrusions that protrude to a predetermined length from the upper and lower surfaces, and are impregnated with resin liquid. At the same time, a wooden core material whose surface is coated with a primer is arranged so that the side surface is locked to the protruding nails protruding on the edge metal fitting, and the upper surface component is horizontally suspended between the upper parts of both side walls of the lower mold. , the upper surface component is pressed between the upper surface component and the lower mold, the upper surface component and the lower surface component are held under pressure via the projection, and the edge metal fitting is pressed between the upper surface component and the lower surface component. A method for producing an injection ski, comprising: holding a wooden core material through an upper claw, and injecting and filling a foamable resin into a gap between an upper surface component and a lower surface component.