JPS5949785A - Head for golf club and production thereof - 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 The present invention relates to a golf club head and a method for manufacturing the same.

Conventionally, it has been known to use persimmon as a golf club head (abbreviated as a head). However, since persimmon wood is a natural product, the manufacturing process requires a lot of effort to process the supplementary material from raw wood and use it as a head, and the quality is uneven, resulting in poor yields. However, it had drawbacks such as high manufacturing costs.

Therefore, as shown in Figure 1, there are already heads made of fiber-reinforced plastics (hereinafter abbreviated as FRP) that use carbon graphite fibers, glass fibers, etc. as reinforcing materials and epoxy resins or polyester resins as matrix resins. It has been devised. These F E ID heads 1 have the advantage that the manufacturing process can be extremely simplified compared to conventional heads made of auxiliary materials. However, these F
(The head made of P also had the following drawbacks. Namely, since the entire head was made of B'E'
The sole part 2 of the / was worn out, which caused cracks to appear in the head during use, and the swing weight changed slightly due to the wear, resulting in poor feel. In addition, it is difficult to knead the reinforcing fibers and matrix resin used, and even though a fiber content of ~70% is required for strength reasons, the delicate content is only around 30 ~ ~70%. As a result, the strength of the neck portion 3 of the head is low, and the vine portion 3 requires special reinforcement, making the work time-consuming. In addition, since compression molding is performed using a press, a large number of molds are required for @ production, which has the disadvantage of increasing manufacturing costs.

In order to improve the shortcomings of these conventional SEEP heads and provide a head that can be mass-produced and has a complementary feel, we developed a complementary and fiber-reinforced thermal head as shown in Figures 2 and 3. Wood-plastic head made of ijJ plastic synthetic resin! It is already well known. This wood-plastic head is different from the conventional head made of T'1-9 because it is not compression-molded but is cut-molded, so productivity is even higher.
production became possible. However, this wood-plastic head also had the following drawbacks. In other words, in order to approximate the feeling of a head made of a bolt, a block B made of a bolt is inserted from the face corresponding part 5 to the inside of the head body. Due to repeated contraction and expansion due to the influence of temperature and humidity, gaps are created at the boundary of the delicately reinforced thermal plastic synthetic resin 7 that surrounds the block B made of extracted material, resulting in a decrease in the product price, and It had the disadvantage that it did not produce a strange t' when it was ladled. In addition, since the neck part 3 is also made of the thermoplastic synthetic resin reinforced with the fibers 11, the strength tends to decrease if voids are formed during cedar. Is the stress in the neck part 41? The drawback was that there was a risk of loss.

In view of these conventional drawbacks, the present invention has high productivity and
A golf club head that is durable, inexpensive, and provides a good feeling, and a method for manufacturing the same.

The present invention will be explained based on the drawings.
As shown in the figure, a lower mold 15 that has the shape of the protruding head of a golf club is fitted with a lower mold 15 that matches the lower mold 15, has a substantially uniform wall thickness, and has a surface corresponding to the face surface. Part g and
, 8 reinforcing parts 10 are arranged on the outside of the head to form a substantially head shape with the surface equivalent part wa removed, and 7 reinforcing parts 10 are placed on one core.
1. Insert the mandrel /3 into the neck part // of the outer shell reinforcement part 10, and then
At 1 minute, set the core/g) 6, then place the upper mold/2, then tighten the mold/3" and/o by 1-bit, and tighten the face 1r11 of the spatula l. Injection injection into the first 1F part of the part corresponding to the surface 9+"] / 7, Sengumi Jffi
A synthetic resin/g is injected and a head/9 is integrally molded at the same time, and a hollow part 20 is formed inside the entire head using a core/reinforcement.
This is a head for a golf club and a method for manufacturing the same, characterized in that the hollow portion is sealed from the sole portion 7.2 with a plate 22.

In carrying out the present invention, for example, a fiber-reinforced metal (hereinafter abbreviated as '1)' Hlν1) is used for the strong member lμ of the heradota I shell and is manufactured by pre-warming lost wax casting. In addition, by mass-producing mandrels/3 in advance, installing them in combination in a mold, and then injecting fiber-reinforced synthetic resin/g, it is extremely easy to manufacture golf club parts. ．． Since it is possible to mass-produce the machine, productivity is improved and manufacturing costs are reduced. Also, unlike conventional heads, the head outer shell reinforcing member 10 of T" RM, which has a substantially uniform wall thickness, is carved, so the sole part /2 and neck part // of the head /9 are 1" thick. The structure is coated with HM, and unlike conventional heads in which the sole and neck parts are made of fiber-reinforced synthetic resin, the sole part 2 does not wear out. ”J
This prevents the neck portion from breaking or cracking due to the impact stress generated during this process, resulting in improved durability. In addition, as shown in Figures 1 to 6, the outer shell portion 10a of the head outer shell reinforcing member/-0 is provided with appropriate holes (T: window-shaped balance adjustment hole 10-0) in consideration of weight reduction and balance of the head itself. By providing a plurality of parts 6, the outer shell part 10J] becomes lighter, and the balance after the head is formed becomes better, and the weight of the head can also be reduced.Furthermore, in the present invention, the head outer shell is reinforced. The head shell reinforcement member Aρ and the fiber-reinforced synthetic resin/g have good adhesion, but in addition, the balance adjustment hole If the fiber reinforced synthetic resin/g is provided in the hole, the anchoring effect will be improved and the adhesion will be even better. By using carbon graphite fiber as the strong and delicate fiber used, the coefficient of thermal expansion can be made extremely small. Since it is possible to prevent delamination, etc., there is no strange sound when ladle, which is caused by the delamination of the boundary surface that tends to occur with conventional plastic heads, and the durability is further improved. The feeling when hitting the ball is also good.In addition, in the head of the present invention, since it is necessary to adjust the weight of the head, a hollow part 2θ is formed in the main body using a core when molding the head. However, hollow part 2
In order to prevent the strength from decreasing due to 0, as shown in FIGS. Ribs are formed in the portion 20 so that the strength of the head is not reduced. Although not shown, by providing the ribs 2/ on the face portion, the coefficient of restitution and strength are improved, thereby creating a synergistic effect of increasing the repulsive force to the ball and increasing the flight distance of the ball. The head outer shell reinforcement assembly used in the present invention is a combination of aluminum alloy, stainless steel alloy, or other metal phase I'.1 with alumina fiber, silicon carbide fiber, carbon fiber assembly, etc. R.M.
By using it as a head shell, it is possible to create a head shell reinforcement assembly that is light, has good abrasion resistance, and is strong. In addition, low-priced popular products use aluminum alloys and stainless steel alloys.

In addition, as another embodiment of the present invention, it is possible to form a sheet molding compound (commonly known as SMC) with carbon graphite fiber and epoxy resin or polyester resin C, and perform transfer molding. By transfer molding using 31 vol of graphite fiber, the carbon graph and graphite fiber patterns are exposed on the head surface, creating a new aesthetic effect on the tethered surface.

Therefore, in 71 of the present invention, 4t +r (-) is capable of supplying l. with extremely good properties, high yield, and durability for use in golf clubs that extend distances. It is.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a conventional F'RP head. FIG. 21 is a perspective view showing a conventional wood-plus deck head. FIG. 3 is a cross-sectional view of a conventional wood-plastic head without drawing. The third figure is a plan view of the head shell catch j1 part according to the present invention. FIG. 5 is a perspective view showing the bottom surface of the head outer shell reinforcing member. FIG. 4 is a perspective view of the head outer shell reinforcing member. FIG. 7 and FIG. g are sectional views showing a part of the manufacturing process of the head. FIG. 7 is a sectional view of the completed head. FIG. 70 is an explanatory perspective view showing attachment of the sole plate member to the completed head. /...Shi' RP head, 2...sole part, 3
...Neck part, G...Wood-plastic head, S...Equivalent to the face surface, B...Auxiliary material block, 7...Fiber-reinforced thermoplastic synthetic resin, Z...Face Part equivalent to two sides, 2...fist, part equivalent to two sides, 10...
・Head outer shell reinforcement part, //... neck part, /2・
... Sole part, /3... Mandrel, / Ri... Core, /6... Lower mold, / B... Upper mold, /7...
Injection injection port, 7g...Fiber reinforced synthetic resin, /9...
Head, 20...Hollow part, 2/--Fist rib, 22...
・Brate, 23・War・Bis.

Claims (1)

[Scope of Claims] Z In a golf club head, a reinforcing layer of fiber-reinforced synthetic resin is exposed in a portion corresponding to the face surface and a portion corresponding to the upper surface, and the other portions are made of fiber-reinforced synthetic resin having an arbitrary thickness and approximately the same thickness. - A head for a golf club, characterized in that the head is integrally molded with a head outer shell reinforcing member having a wall thickness, and a hollow portion is formed inside the head body from the sole portion of the head outer shell reinforcing member. . 2. The golf club head according to claim 1, wherein the head outer shell reinforcing member is made of fiber-reinforced metal or metal such as aluminum or stainless steel. 3. The golf club head according to claim 1, wherein a balance adjustment hole of an arbitrary shape is provided in the outer shell portion of the head outer shell reinforcing member. q In a lower mold having the shape of a golf club head, a mold that matches the lower mold, has a substantially uniform wall thickness, and has a substantially head shape with a portion corresponding to the face surface and a portion corresponding to the upper surface removed. The formed head outer shell reinforcing member is placed, a mandrel is inserted into the neck portion of the head outer shell reinforcing member, a core is installed inside the portion corresponding to the head body,
Next, after placing the upper mold, the upper and lower molds are clamped, and the fiber-reinforced synthetic resin is injected from the injection inlet provided at any location such as the face surface of the head or the face light area. hand,
A method for manufacturing a golf club head, characterized by simultaneously integrally molding the head.