JP6997682B2 - How to make a blade and blade - Google Patents

Description

The present invention relates to blades for competition sticks, such as methods and blades for making blades used in sticks such as ice hockey and field hockey.

As a structure of a hockey stick, a structure having various configurations including a shaft and a blade is known.

It is known that such a stick blade has a prepreg wound around a central member (called a core material or the like).

As such a blade, for example, Patent Document 1 discloses a blade having a configuration in which a tape-shaped prepreg is continuously wound around the front surface, the back surface, and the side surface of the core material.

U.S. Pat. No. 7,824,591

However, in the blade according to Patent Document 1, it is assumed that the internal pressure molding method is used, but not only special equipment is required, but also a hollow space is formed inside the blade in order to apply the internal pressure. It is known that the strength is reduced because it is necessary to do so. On the other hand, a method of molding a blade using a die can be considered. Although a load can be applied to the front surface or the rear surface of the blade during pressing, a load cannot be applied to the side surface of the blade during molding. There was a problem that voids were formed on the side surface of the blade and molding was defective.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide a blade having improved durability by reducing voids and molding defects while ensuring the strength of the blade. There is something in it. Other objects of the invention will become apparent by reference to the entire specification.

In the method for manufacturing a blade according to an embodiment of the present invention, a core member having a front surface portion, a rear surface portion, and a side portion is formed, and at least a part of a side portion of the core member and at least a front portion thereof. A foam member that covers a part and at least a part of the rear surface portion is arranged, a prepreg is arranged so as to cover the core member and the foam member, and these are placed in a mold and fired. It is configured to be demolded later.

The blade in the method for producing a blade according to an embodiment of the present invention is used for hockey.

The foaming member in the method for manufacturing a blade according to an embodiment of the present invention is a foamed sheet.

In the method for producing a blade according to an embodiment of the present invention, the foamed member is arranged so as to be stretched along the stretching direction of the side portion of the core member.

In the method for manufacturing a blade according to an embodiment of the present invention, a plurality of foam sheets are arranged as the foam members.

In the method for manufacturing a blade according to an embodiment of the present invention, a core member having a front surface portion, a rear surface portion, and a side portion is formed, a first prepreg is arranged so as to cover the core member, and the first prepreg is arranged. A foaming member is arranged so as to cover the prepreg of 1, a second prepreg is arranged so as to cover the foaming member, these are placed in a mold and fired, and the mold is removed after the firing treatment. ..

A blade according to an embodiment of the present invention is a blade including a core member having a front surface portion, a rear surface portion, and a side portion, and a prepreg arranged so as to surround the outside of the core member. The foam member is configured to cover at least a part of a side portion of the core member, at least a part of the front surface portion, and at least a part of the rear surface portion.

According to the above embodiment, it is possible to provide a blade having improved durability by reducing voids and molding defects while ensuring the strength of the blade.

It is sectional drawing of the blade which concerns on one Embodiment of this invention. It is a figure which shows the cross section of the whole blade which concerns on one Embodiment of this invention. It is sectional drawing of the blade in the method of manufacturing a blade which concerns on one Embodiment of this invention. It is sectional drawing of the blade in the method of manufacturing a blade which concerns on other embodiment of this invention. It is a figure which shows the use example of the foam member in the method of manufacturing a blade which concerns on one Embodiment of this invention. It is a figure which shows the use example of the foam member in the method of manufacturing a blade which concerns on one Embodiment of this invention. It is a figure which shows the use example of the foam member in the method of manufacturing a blade which concerns on one Embodiment of this invention. It is a figure which shows the use example of the foam member in the method of manufacturing a blade which concerns on one Embodiment of this invention.

Hereinafter, the method for manufacturing the blade and the embodiment of the blade according to the present invention will be specifically described with reference to the accompanying drawings.

Structures common to a plurality of drawings are designated by the same reference numeral throughout the plurality of drawings. It should be noted that each drawing is not always drawn to the correct scale for convenience of explanation.

The blade according to the embodiment of the present invention can be used for a stick for sports competition, and can be used for a stick such as ice hockey or field hockey, for example.

Next, FIG. 1 is a cross-sectional view showing an embodiment of the blade 1 according to the present invention. As shown in the figure, the blade 1 according to the embodiment of the present invention is arranged so as to surround the core member 2 having the front surface portion 3, the rear surface portion 4, and the side portion 5, and the outside of the core member 2. A blade 1 comprising the prepreg 6 to cover at least a portion of a side portion 5 of the core member 2, at least a portion of the front surface portion 3, and at least a portion of the rear surface portion 4. It is configured to include a foam member 7.

The foamed member 7 in the blade 1 according to the embodiment of the present invention is, for example, the front surface portion 3 of the core member 2 or the core in addition to at least a part of the side portion 5 of the core member 2 or the side portion 5 of the core member 2. The rear surface portion 4 of the member can be configured to cover a width in the range of 1-30 mm, preferably in the range of 3-15 mm. Other aspects will be described later.

As the core member 2 in the blade 1 according to the embodiment of the present invention, materials such as PVC, PET, polymethacrylicimide, acrylic, and balsa can be used. As the material used for the core member 2, a material having a specific gravity of 0.05 g / cm ^{3-0.5 g / cm 3 can} be used.

In addition to or in addition to the prepreg in the blade 1 according to the embodiment of the present invention, materials such as carbon, glass, and aramid can be used. Further, as a reinforcing material used for prepreg, a thermosetting synthetic resin such as epoxy is used as a synthetic resin formed and impregnated with organic or inorganic fibers such as glass, boron, aramid, and alumina in addition to carbon fiber. Can be used.

Further, in the example shown in FIG. 1, a prepreg 6 arranged so as to surround the outside of the core member 2, at least a part of a side portion 5 of the core member 2, and at least a part of the front surface portion 3 are used. Although it is said that at least a part of the rear surface portion 4 and a foaming member 7 for covering the rear surface portion 4 are provided, the term "covering" in the present embodiment means that one member directly or indirectly covers the other member. That is, in the above example, the prepreg 6 and / or the foamed member 7 may be configured to directly cover the core member 2 or to be covered by another member (a member composed of one layer or a plurality of layers). Further, the prepreg 6 and / or the foaming member 7 may be formed not only in one layer but also in a plurality of layers. Details of these will be described later.

Next, FIG. 2 shows a cross-sectional view of the entire blade (prepreg 6 is not shown here). As shown in the figure, the foaming member 7 in the blade 1 according to the embodiment of the present invention is provided so as to extend along the extending direction B of the side portion 5 of the core member 2.

By doing so, the adhesion between the core member and the prepreg can be improved, and the prepreg can be effectively prevented from peeling from the core member, so that the durability of the entire blade can be improved.

Next, a method for manufacturing the blade 1 according to the embodiment of the present invention will be described.

First, as a method for manufacturing a blade according to an embodiment of the present invention, first, a core member 2 having a front surface portion 3, a rear surface portion 4, and a side portion 5 is prepared. Next, a foam member 7 that covers at least a part of the side portion 5 of the core member 2, at least a part of the front surface portion 3, and at least a part of the rear surface portion 4 is arranged. Further, the prepreg 6 is arranged so as to cover the core member 2 and the foaming member 7.

After that, the preform formed in this way is used as a mold (for example, a mold in which the front surface of the core member is an upper mold, the rear surface portion is a lower mold, and the side portion is an upper and lower mating portion (parting portion)). Put in and close the mold. Then, the mold temperature is set to about 80-150 ° C., the mold is tightened with a press while maintaining a predetermined pressure, and a firing process is performed (including a curing process). Here, the foamed member 7 starts foaming in a predetermined temperature range (temperature range in which the impregnated resin softens), and the expanded member expands the prepreg from the inside toward the mold, that is, the side surface of the blade. A force that pushes in the direction can be generated. The molded product thus produced can be taken out (demolded) from the mold to obtain the blade 1 according to the embodiment of the present invention. Here, conditions such as each step and various parameters in the above method can be appropriately set, but the above detailed description will be omitted here.

By such a method for manufacturing a blade, as compared with the case where the internal pressure molding method is used, it is not necessary to form a hollow space inside the blade in order to apply the internal pressure, so that it is possible to prevent a decrease in strength. Further, by the manufacturing method, not only the load can be applied to the front surface and the rear surface of the blade when the die is pressed, but also the arranged foam member expands under a predetermined temperature, so that the prepreg is gold from the inside. Since the load can be applied in the direction of the mold, that is, in the side surface direction of the blade, it is possible to prevent the generation of voids that may be formed on the side surface of the blade during molding, and it is possible to avoid molding defects.

This makes it possible to provide a blade with improved durability by reducing voids and molding defects while ensuring the strength of the blade.

The blade 1 in the method for manufacturing the blade 1 according to the embodiment of the present invention is used for hockey.

The foaming member 7 in the method for manufacturing the blade 1 according to the embodiment of the present invention is a foaming sheet. As the foam sheet, a synthetic resin to which a heat-foamable filler is added can be used. As the synthetic resin, a thermosetting resin, for example, an epoxy resin, a phenol resin, an unsaturated polyester, or the like is assumed, but the synthetic resin is not limited thereto. Further, as the heat-foamable filler, heat-expandable microcapsules and the like can be used, but the present invention is not limited to this. Preferably, a resin having adhesiveness such as an epoxy resin or an acrylic resin can be used. A plurality of foam sheets can be used as the foam member 7 used in the method for producing a blade according to an embodiment of the present invention.

In the method for producing the blade 1 according to the embodiment of the present invention, the foamed member 7 can be arranged so as to be stretched along the stretching direction of the side portion of the core member, but other methods may also be used. I do not care. Further, in the method for manufacturing the blade 1 according to the embodiment of the present invention, by providing the foaming member 7 along the position of the parting portion of the mold, when the foaming member 7 is foamed, the parting of the mold is performed. The air (voids) accumulated between the layers of the prepreg can be more reliably discharged to the outside through the portion. Further, the molding pressure of the parting portion can be replenished as appropriate.

As shown in FIG. 3, in the method for manufacturing the blade 1 according to the embodiment of the present invention, after arranging the prepreg 6 without providing the foaming member 7 on the core member 2, the firing process using the above-mentioned mold is performed. In front, a foam member 7 that covers at least a part of the side portion 10 of the prepreg 6, at least a part of the front surface portion 8 of the prepreg 6, and at least a part of the rear surface portion 9 of the prepreg 6 is arranged. The second prepreg 12 is configured to cover the prepreg 6 and the foaming member 7.

In addition, as shown in FIG. 4, in the method for manufacturing the blade 1 according to the embodiment of the present invention, the prepreg 6 is arranged so as to cover the core member 2 and the foaming member 7, and then the above-mentioned mold is used. A second portion that covers at least a portion of the side portion 10 of the prepreg 6, at least a portion of the front surface portion 8 of the prepreg 6, and at least a portion of the rear surface portion 9 of the prepreg 6 prior to the firing process. The foaming member 11 may be arranged, and the second prepreg 12 may be arranged so as to cover the foaming member 11, the prepreg 6, and the foaming member 11.

5 and 6 show a modification of FIG. 2. As shown in FIG. 5, the foamed member 7 in the method for manufacturing a blade 1 according to the embodiment of the present invention has a side portion 5 of the core member 2 and a front surface portion 3 in the region of the tip portion of the blade 1. It is provided so as to cover a part and a part of the rear surface portion 4. As a result, when voids and design defects are more likely to occur in the region of the tip of the blade 1, it is possible to focus on the locations where voids and design defects are more likely to occur, and the cost of the foamed member is also reduced. can do.

Next, as shown in FIG. 6, the foamed member 7 in the method for manufacturing the blade 1 according to the embodiment of the present invention is a region at the end of the blade 1 on the shaft side (for example, a region where the area of the side surface of the core member is large). Etc.), it is provided so as to cover the side portion 5 of the core member 2, a part of the front surface portion 3, and a part of the rear surface portion 4. In a region where the area of the side surface of the core member is large, voids and design defects are likely to occur during molding, so such a region can be used. As a result, when voids and design defects are more likely to occur in the end region of the blade 1 on the shaft side, it is possible to provide the blade 1 in a focused manner, and the cost of the foaming member can be reduced.

Next, with reference to FIG. 7, other modifications are shown. As shown in FIG. 7, the foaming member 7 in the method for manufacturing a blade 1 according to the embodiment of the present invention has a side portion 5 of the core member 2, a front surface portion 3, and the front portion 3 in the entire region of the blade 1. It is provided so as to cover the rear surface portion 4. This makes it possible to prevent voids and design defects regardless of the location of the blade 1, improve the adhesion between the core member and the prepreg, and provide a blade with excellent durability. Become.

Next, with reference to FIG. 8, another modification is shown. As shown in FIG. 8, the foamed member 7 in the method for manufacturing the blade 1 according to the embodiment of the present invention has a side portion 5 of the core member 2 and a front surface portion 3 in the region of the tip end portion of the blade 1. It is provided so as to cover a part of the rear surface portion 4 and a part of the rear surface portion 4. In addition, since the tube 13 for forming the internal pressure is inserted only in a part of the other part (for example, the area from the maximum curvature point (called the heel) of the blade to the end region on the shaft side), the blade is inserted. Pressure can be formed from the inside to the outside during the fabrication of. In this way, voids and design defects can be prevented regardless of the location of the blade 1, the adhesion between the prepreg and the prepreg is improved, and the decrease in strength due to the insertion of the tube is minimized. By doing so, it becomes possible to provide a blade having excellent durability.

The dimensions, materials, and arrangement of each component described herein are not limited to those expressly described in the embodiments, and each component may be included in the scope of the present invention. Can be modified to have the dimensions, materials, and arrangement of. In addition, components not explicitly described in the present specification may be added to the described embodiments, or some of the components described in each embodiment may be omitted.

1 Blade 2 Core member 3 Front part 4 Rear part 5 Side part 6 prepreg 7 Foaming member 8 Front part 9 Rear part 10 Side part 11 Second foaming member 12 Second prepreg 13 Tube

Claims (4)

A method for making blades used in hockey.
A core member having a front surface portion, a rear surface portion, and a side portion, the core member having a rectangular shape in a cross section perpendicular to the front surface portion and perpendicular to the extending direction of the blade to the tip of the blade. The front surface extending in the longitudinal direction of the rectangle in a cross section perpendicular to the front surface and perpendicular to the extension direction of the blade to the tip of the blade, and the blade perpendicular to the front surface and to the tip of the blade. The rear surface portion that extends in the longitudinal direction of the rectangle and faces the front surface portion in the direction perpendicular to the longitudinal direction when viewed in a cross section perpendicular to the stretching direction, and the blade that is perpendicular to the front surface portion and to the tip of the blade. The core member having the side portion extending in the lateral direction of the rectangle when viewed in a cross section perpendicular to the stretching direction is formed.
A foamed member before foaming that covers at least a part of the side portion of the core member, at least a part of the front surface portion, and at least a part of the rear surface portion is arranged.
A prepreg is arranged so as to cover the core member and the foamed member before foaming.
Put these in a mold and bake them.
A method for producing a blade used for hockey, which comprises performing demolding after a firing process. The method for producing a blade according to claim 1 , wherein the foamed member before foaming is a foamed sheet before foaming. The method for producing a blade according to claim 1 or 2 , wherein a plurality of pre- foamed foam sheets are arranged as the pre- foamed foam member. A method for making blades used in hockey.
A core member having a front surface portion, a rear surface portion, and a side portion, the core member having a rectangular shape in a cross section perpendicular to the front surface portion and perpendicular to the extending direction of the blade to the tip of the blade. The front surface extending in the longitudinal direction of the rectangle in a cross section perpendicular to the front surface and perpendicular to the extension direction of the blade to the tip of the blade, and the blade perpendicular to the front surface and to the tip of the blade. The rear surface portion that extends in the longitudinal direction of the rectangle and faces the front surface portion in the direction perpendicular to the longitudinal direction when viewed in a cross section perpendicular to the stretching direction, and the blade that is perpendicular to the front surface portion and to the tip of the blade. The core member having the side portion extending in the lateral direction of the rectangle when viewed in a cross section perpendicular to the stretching direction is formed.
A first prepreg is placed so as to cover the entire core member.
The foamed member before foaming is arranged so as to cover at least a part of the side portion of the first prepreg, at least a part of the front portion, and at least a part of the rear surface portion .
A second prepreg was placed so as to cover the first prepreg and the foamed member before foaming.
Put these in a mold and bake them.
A method for producing a blade used for hockey, which comprises performing demolding after a firing process.

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