JPH06102091B2 - Ski manufacturing method - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a ski manufacturing method. More specifically, it relates to a so-called monocoque type ski manufacturing method.

[0002]

2. Description of the Related Art A so-called monocoque type ski and a method for manufacturing the ski are disclosed in Japanese Patent Laid-Open No. 1-284.
272, "Ski manufacturing method and ski manufactured by this method" (Prior art 1), Japanese Patent Laid-Open No. 3-12275
"Ski manufacturing method and ski manufactured by the method" (conventional example 2) is known.

Prior art example 1 states that "in particular, an assembly of skis including an upper surface layer is molded under heating, and the surface layer is composed of a heat-deformable material sheet which is deformed under heating during molding.
And, in the method for manufacturing a ski, wherein the softening point of the sheet of heat-deformable material forming the surface layer is slightly lower than the deformation temperature thereof, the sheet of heat-deformable material forming the upper surface layer is substantially At least one outer layer of a first transparent plastic material and an inner layer of a substantially opaque second plastic contrast material, the inner layer being externally provided through the outer layer. Includes a colorant that defines a visible decorative pattern,
And the plastic material forming the sheet of heat-deformable material is the second material whose melting point and softening point under heating of the first material forming the outer layer forms the inner layer. The melting point of the first material is selected to be below the melting point and softening point of the first layer, and the melting point of the first material forming the outer layer is slightly higher than the molding temperature. Is disclosed.

In Conventional Example 2, "a step of molding at least an upper portion of a ski provided with a cover ply in a mold so that a flange-shaped edge portion is formed on the cover ply, and a lower portion of the ski. Arranging the lower part of the ski on the upper part of the ski such that the edges of the ski are aligned with the flange-shaped edge, and connecting the upper part and the lower part of the ski. The manufacturing method of the characteristic ski. "

[0005]

Conventional Example 1 relates to a method for manufacturing a monocoque type ski, but does not relate to a ski using a so-called cover ply.

Conventional example 2 describes a method of manufacturing a ski using a so-called cover ply. However, in Conventional Example 2, the ski manufacturing process includes "a step of disposing the lower part of the ski on the upper part of the ski and a step of connecting the upper part and the lower part of the ski".

Therefore, when an adhesive is used between the upper and lower parts of the ski to connect the upper and lower parts of the ski, the adhesive hangs down toward the cover ply side,
There was a problem of product deterioration.

Further, as shown in the sectional view of the ski in FIG. 11, when the ski is manufactured by using a cover ply, the ski top a and the ski bottom b do not have the same side surface and are provided with a so-called offset. However, there is a problem that the ski top and the ski bottom cannot be sufficiently positioned.

[0009]

Means for Solving the Problems

Steps of installing a ski bottom having a flat plate shape inside the positioning section on a lower die provided with a positioning section projecting upward from the peripheral section, a step of laminating a core material on the ski bottom, and a ski Cover the upper part with a U-shaped cross-section and cover the flange provided around the opening end and the recess provided in the flange with the opening facing downwards from the top of the core to the recess of the flange. The step of aligning the positioning portions, covering the cover with an upper die having a U-shaped cross section, aligning the notch portion provided in the upper die with the positioning portion provided in the lower die, and the ski bottom and the opening end of the cover. A method for manufacturing a ski, comprising the step of fixing

And

[0012] In an upper mold having a U-shaped cross-section with a notch formed in the peripheral portion, provided on the flange and the flange provided around the opening end and having a U-shaped cross-section that constitutes the upper part of the ski. The cover having the recessed portion, the opening facing upward, the recessed portion provided in the flange portion and the notch portion provided in the upper mold are aligned and stored, the step of storing the core material in the inner bottom portion of the cover, The process of laminating the ski bottom made of a flat plate on the lower mold, the upper mold is turned upside down together with the cover and the core material, and the recess provided in the flange portion of the cover and the notch provided in the upper mold are attached to the lower mold periphery. Of the ski so that the ski bottom and the opening end of the cover are fixed by placing the ski bottom on the lower ski bottom in conformity with the positioning portion provided so as to project upward from the ski bottom. Production method,

[0013]

[0014]

A cover having a U-shaped cross-section that constitutes the upper part of the ski and having a flange provided around the opening end and a recess partially provided in the flange is formed. Then, a ski bottom having a flat plate shape is placed on the lower die provided with a positioning portion to be projected at a position corresponding to the concave portion provided in the cover. Next, a core material is laminated on the ski bottom, and a cover with the opening facing downward is placed over the core material to align the positioning portion with the concave portion of the flange. Then, cover the top of the cover with a U-shaped cross section,
The cutout portion provided on the upper die and the positioning portion provided on the lower die are aligned to fix the ski bottom portion and the opening end portion of the cover. Then, a so-called monocoque type ski is obtained.

Or

A cover having a U-shaped cross-section which constitutes the upper part of the ski and having a flange provided around the opening end and a recess partially provided in the flange is formed. Then, a cover having an opening facing upward is housed in the upper mold having a U-shaped cross-section with the recess provided in the flange and the notch provided in the upper mold aligned. Next, the core material is stored in the bottom of the cover. Next, a flat ski bottom is laminated on the lower mold. Then, the upper mold is turned upside down together with the cover and the core member so that the recess provided in the flange of the cover and the notch provided in the upper mold are projected from the lower mold at a position corresponding to the recess provided in the cover. The ski bottom and the open end of the cover are fixed by being placed on the ski bottom of the lower mold in conformity with the positioning portion provided. Then, a so-called monocoque type ski is obtained.

[0017]

Embodiments will be described below with reference to the drawings showing an embodiment of the present invention. Reference numeral 11 shown in FIG. 1 is a perspective view and FIG. 2 is a front sectional view. The cover 11 is made up of the entire length of the ski, and is made of ABS resin or other thermoplastic resin by vacuum molding or another method so as to have a U-shaped cross section over the entire length.

A flange 12 is formed around the open end of the cover 11. In this embodiment, the flange portion 12 is partially formed with three concave portions 13 on both sides of the front end, the intermediate portion and the rear portion as viewed from the opening side.

Reference numeral 21 is a bottom of the ski. Ski bottom 21
Is manufactured by a polyethylene plate-shaped body having a ski bottom shape and trimmed with steel edges, or a plate-shaped body having one or two layers of glass fibers laminated thereon.

Reference numeral 22 is a core material. The core material 22 is wood,
Alternatively, urethane foam or a laminate of wood and urethane foam is obtained by cutting it into a shape that exactly matches the inner surface of the cover 11. Alternatively, it is obtained by cutting a laminated body of a core material in which a prepreg is wound or covered on a core material having a gap of the thickness of the FRP prepreg, and cut into a shape that exactly matches the inner surface of the cover 11.

Reference numerals 31 and 32 in the plan views of the opening side are shown in FIGS. 3 and 4, respectively. The upper die 31 has a U-shaped cross section, and when the cover 11 is housed in the upper die 31, the recess 13 provided in the flange 12 of the cover 11 is provided.
A notch 33 on the upper die side that is wedge-shaped in plan view is provided at a position corresponding to. The lower die 32 also has a U-shaped cross section, and when the cover 11 is housed in the upper die 31, the flange 1 of the cover 11 is
A triangular pyramid-shaped positioning portion 34 is provided at a position corresponding to the recessed portion 13 provided in 2. The positioning part 34 may be made of a pin.

Next, the manufacturing method of the first embodiment will be described. In the first embodiment, as shown in FIG. 5, first, the ski bottom portion 21 having a flat plate and having an edge sliding surface is installed in the recess 35 between the positioning portions 34 on the lower mold 32. Next, a glass fiber 23 impregnated with an adhesive is wrapped on the ski bottom 21 in a pre-prepared or raw resin form, and a core material 22 shown in FIG. 8 is laminated on the ski bottom 21 and the both are fixed with an adhesive. Core 22, ski bottom 2
An adhesive is applied to the joint portion of the first cover 11 with the cover 11.

Next, as shown in FIG. 6, the cover 11 with the opening facing downward is attached to the flange portion 12 of the cover 11.
While fitting the recessed portion 13 provided in the lower mold 32 into the positioning portion 34 provided so as to project upward from the lower mold 32, the cover ski bottom portion 21 and the opening end portion of the cover are fixed from above the core material 22. Since the cover 12 is provided with the flange 12, the flange 12 and the ski bottom portion 21 are bonded to each other. Further, as shown in FIG. 7, the cover 1
1 With the upper die 31 having the same inner surface as the outer surface, the notch 33 provided on the upper die 31 is pressed from the outside of the cover 11 while the positioning portion 34 provided by projecting upward on the lower die 32 is fitted and aligned. .

After fixing, the ski is removed from the upper mold 31 and the lower mold 32, and the excess portion of the flange 12 is trimmed and removed. Then, a so-called monocoque type ski is obtained.

In the second embodiment, the cover 11 is housed in the upper mold 31 having the same inner surface as the outer surface of the cover 11 with the opening facing upward as shown in FIG. At this time,
The recess 13 provided in the cover 11 and the notch 33 provided in the upper mold 31 are aligned and housed. Then, an adhesive is applied to the inner surface of the cover 11. Then cover 11
The core material 22 shown in FIG. 8 wrapped around the glass fiber 23 impregnated with the adhesive on the bottom is shown in FIG.
No. 0 is laminated as shown in FIG. 0, and an adhesive is applied to the upper surface. On the other hand, the ski bottom 21 made of a flat plate is attached to the lower mold 34.
Install in the recess of the.

Next, the cover 11 of the ski bottom 21 and
Apply adhesive to the joint on the top of the ski. At this time, since the flange portion 12 is provided on the cover 11, the adhesive agent is applied to the flange portion 12 and the ski bottom portion 21. Then, the upper mold 31 is turned upside down, the opening is directed downward, and the upper mold 31 presses the cover 11 from the outside. At this time, the recess 13 provided in the cover 11 and the notch 33 provided in the upper mold 31 are fitted and aligned with the positioning portion 34 provided in the lower mold 32 to be stored.

After fixing, the skis are removed from the upper mold 31 and the lower mold 32, and the excess portion of the flange 12 is trimmed and removed. Then, the ski bottom portion 21 and the core member 22 are bonded to each other, and a so-called monocoque type ski is obtained.

[0028]

Therefore, in the present invention, since the adhesive does not turn to the cover side, product deterioration does not occur, and positioning of the ski having a so-called offset between the ski bottom and the ski upper is facilitated. It becomes possible to manufacture.

[Brief description of drawings]

FIG. 1 is a perspective view of a cover used in an embodiment of the present invention.

FIG. 2 is a sectional view of a cover used in an embodiment of the present invention.

FIG. 3 is a plan view of an opening side of an upper die used in an embodiment of the present invention.

FIG. 4 is a plan view of an opening side of a lower mold used in the embodiment of the present invention.

FIG. 5 is a sectional view of the lower mold side of the manufacturing process of the embodiment of the present invention.

FIG. 6 is a sectional view of the lower mold side of the manufacturing process of the embodiment of the present invention.

FIG. 7 is a cross-sectional view of the joined state of the upper die and the lower die in the manufacturing process of the embodiment of the present invention.

FIG. 8 is a sectional view of the core material in the manufacturing process of the embodiment of the present invention.

FIG. 9 is a sectional view of the upper die side of the manufacturing process of another embodiment of the present invention.

FIG. 10 is a sectional view of the upper die side of the manufacturing process of another embodiment of the present invention.

FIG. 11 is a central sectional view of the ski.

[Explanation of symbols]

 11 Cover 12 Flange 13 Recessed Part (Viewed from Flange Opening Side) 21 Ski Bottom 22 Core Material 31 Upper Mold 32 Lower Mold 33 Cutout 34 Positioning Part

Claims (2)

[Claims] 1. A step of installing a flat ski bottom portion inside a positioning portion on a lower die provided with a positioning portion protruding upward from a peripheral portion, and a step of laminating a core material on the ski bottom portion. , A cover having a U-shaped cross-section that constitutes the upper part of the ski and having a flange portion provided around the opening end portion and a recess provided in the flange portion is covered with the opening portion facing downward from above the core material. The step of aligning the positioning portion with the recess, covering the cover with an upper die having a U-shaped cross-section, aligning the notch portion provided on the upper die with the positioning portion provided on the lower die, the ski bottom and the open end of the cover. A method for manufacturing a ski, comprising the step of fixing the parts to each other. 2. A flange portion and a flange portion, which are formed in a U-shaped cross section and have a U-shaped cross section and which are provided around the opening end, in an upper die having a U-shaped cross section in which a cutout portion is provided in a peripheral portion. The step of storing the cover having the recessed portion provided on the opening with the recess facing the opening and the cutout provided on the upper mold aligned with each other, and storing the core material in the inner bottom portion of the cover. The step, the step of laminating the ski bottom formed of a flat plate on the lower mold, the upper mold is turned upside down together with the cover and the core member, and the recess provided in the flange portion of the cover and the notch provided in the upper mold are lowered. And a step of fixing the ski bottom and the open end of the cover by placing the ski bottom on the ski bottom in conformity with a positioning portion provided so as to project upward from the mold peripheral portion. Ski manufacturing method.