JPS62236570A - Production of ski board - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for manufacturing a ski with an improved core structure.

[Conventional technology]

Conventionally, hollow core members such as honeycomb cores, pipe cores, or cardboard cores made of metal or FRP (fiber-reinforced plastics) have been widely used for the core of skis to reduce weight. It is put into practical use.

[Problem that the invention seeks to solve]

However, when molding the above-mentioned conventional skis, especially the core, the frontage direction of the hollow core member is in the ski thickness direction, so while the compressive strength in the ski thickness direction is high, the ski thickness Not only is it extremely difficult to cut to fit the size and width distribution, but there are also problems in that the yield is poor, the screw holding force for fixing the shoe fastener is weak, and the rigidity is insufficient.

This invention was made after the above circumstances, and its purpose is to be able to mold a hollow core member with a good yield without cutting the core body, and to increase the rigidity. The object of the present invention is to provide a method for manufacturing skis.

[Means for solving problems]

In order to solve the above-mentioned problems, the present invention provides a method for manufacturing skis in which each constituent part of the upper and lower surfaces of the ski is laminated and integrated on both the upper and lower surfaces of the core, in which the core is formed into a straw-shaped structure. A plurality of cylindrical molded bodies made of fiber material impregnated with uncured liquid synthetic resin are arranged in a mold in a stacked V shape along the longitudinal direction of the ski, crushed and deformed to the ski thickness and width distribution, and heated. It is made of pressure-formed material.

[For production]

However, by having the above-described structure, the present invention is capable of injecting an uncured liquid material made of a thermosetting synthetic resin such as an epoxy resin or a phenol resin into a flow-like fiber material made of a nonwoven fabric in a mold. A plurality of cylindrical molded bodies impregnated with synthetic resin and semi-cured into prepreg if necessary are placed one on top of the other along the longitudinal direction of the ski and can be heated and pressurized. The cylindrical molded bodies can be crushed and deformed in the ski thickness direction and the ski width direction to easily form the desired core size and shape, and the adhesion between each cylindrical molded body is performed using impregnated resin. is possible,
When arranging each cylindrical molded body in a mold, it is possible to improve the yield by stacking them in stages so that the thickness in the center becomes shorter according to the ski thickness size distribution. At the same time, it becomes possible to increase the rigidity.

〔Example〕

The present invention will be explained below based on illustrated embodiments.

Figure 1 is a +i4 diagram of a ski manufactured through the core manufacturing method described later, and includes surface decorative material 1 and FRI).
A ski upper surface component consisting of the upper surface strength member 2, a ski lower surface component consisting of the running face plate 3, sole edge 4, and FRP lower surface strength member 5, and side plates 6 are laminated on both the upper and lower sides and both left and right sides of the core body 7. The core body 7 is a hollow core member which is made by stacking a plurality of pieces along the longitudinal direction of the ski and crushingly deforming them into desired ski thickness and width distributions. Cylindrical body 8... is shaped like this.

As shown in FIG. 2, the core 7 has a total length of 1,000 to 2,000 m+, a thickness of 1.0 to 2.0 mm at both front and rear ends in the longitudinal direction of the ski, and a thickness of 1.0 to 2.0 mm in the longitudinal direction of the ski. The ski has a thickness distribution such that the thickness t3 at the center is 10 to 20 m, and the width at both front and rear ends in the longitudinal direction of the ski is 60 to 90 mm, and the width at the center of the ski in the longitudinal direction is 5 mm.
Each cylindrical body 8 is formed with a ski width dimension of 0 to 70M and is stacked on top of the other.
・A tap is placed in the center of the ski in the longitudinal direction, and depending on the thickness of the ski, for example, 1 step, 2 steps, 3 steps and length a, 9.
They are laminated and bonded by decreasing the temperature of ℃3 in stages.

That is, in order to mold the above-mentioned core body 7, as shown in FIGS. 3 to 5, a straw-shaped fiber material is impregnated with an uncured liquid synthetic resin and semi-cured into a prepreg shape as necessary. The formed cylindrical body 11 is divided into lengths i, i2゜β3 according to the ski thickness distribution, and a plurality of pieces are laminated in stages to form upper and lower skis having the desired ski length, thickness and width distribution. Cavity 14 of the lower mold 13 of the mold 12 consisting of a mating mold
(See Figures 3 and 4). At this point, FRP side plates 6, 6, which serve as ski side-composing members, are attached in advance to the left and right side wall surfaces of the cavity 14 of the lower mold 13. Next, by clamping the upper mold 15 to the lower mold 13 of the mold 12 in which the cylindrical molded body 11 and the side plates 6.6 are disposed, the respective cylinders are The cylindrical molded bodies 11 are heated and pressed while being crushed and deformed in the ski thickness direction and the ski width direction, and the respective cylindrical molded bodies 11 are cured and molded and simultaneously bonded to each other with impregnated resin to form the side plate 6. The fifth part is integrally molded with .6.
(see figure), to the core body 7 after mold release molded in this way,
Using other molds (not shown), the components of the upper and lower surfaces of the ski are laminated and bonded together to obtain a ski as shown in FIG. 1.

By the way, the cylindrical molded body 11, which is the molding material of the core body 7 described above, is formed of a straw-shaped fiber material, such as a nonwoven fabric made of synthetic 1M fibers such as vinylon, and has a thickness of 0.1 mm. It is made by laminating 1 to 3 layers of ~0.2s fiber material with a cylinder diameter of 4 to 8 m, and the impregnating resin is a thermosetting synthetic resin such as epoxy resin or phenol resin. .

In the above embodiment, when forming the core, an intermediate plate 16 is interposed at the center in the width direction of the ski along with the left and right side plates 6, 6, as shown in FIG. 6, to improve rigidity. You can also do it. In addition, as another example, when molding only the core body excluding the side panels, or when using a hardened flow FRP plate as a strength member of the upper and lower ski side constituent members, it is possible to mold the core body at the same time as the molding of the core body. It is also possible to bond and integrate the components of the upper and lower ski surfaces, and it goes without saying that various modifications can be made without departing from the gist of the present invention.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, the core, on which the upper and lower ski components are laminated and integrated, is impregnated with a plurality of straw-shaped resins! Since it is formed by arranging cylindrical molded bodies made of I-fiber material in an overlapping manner along the longitudinal direction of the ski and crushing and deforming them to the desired ski thickness and width distribution, conventional cutting is not possible. The core body can be easily formed without any processing, the yield is improved, and the rigidity can be increased, and the screw retention force for shoe fasteners can be improved. It is effective.

[Brief explanation of drawings]

Figure 1 shows the manufacturing method of skis according to this invention! yJ
FIG. 2 is a schematic side view of the center core, and FIGS.
The figures are explanatory diagrams showing the manufacturing process of the core body, and FIG. 6 is a cross-sectional perspective view of the main part of the core body, not showing another embodiment of the present invention. 1.2... Ski upper surface constituent member, 3.4.5... Ski lower surface constituent member, 6... Side plate, 7... Core body, 8... Cylindrical body, 11... - Cylindrical molded body, 12... mold.

Claims (4)

[Claims] (1) In a ski manufacturing method in which the upper and lower ski components are laminated and integrated on both the upper and lower surfaces of a core, the core is made of a straw-shaped fiber material impregnated with an uncured liquid synthetic resin. A ski board characterized in that a plurality of cylindrical molded bodies are superimposed along the longitudinal direction of the ski, placed in a mold, compressed and deformed to the ski thickness and width dimension distribution, and then hot-press molded. Manufacturing method. (2) In the method for manufacturing a ski according to claim 1, each of the cylindrical bodies constituting the core is laminated while being cut to a length according to the thickness of the ski. A manufacturing method characterized by: (3) In the method for manufacturing a ski according to either claim 1 or 2, the fiber material of each cylindrical body constituting the core is made of synthetic fiber such as vinylon. A manufacturing method characterized by non-woven fabric. (4) The method for manufacturing a ski according to any one of claims 1 to 3, characterized in that a side plate is integrally attached at the same time as the core is formed. The manufacturing method.