JPS5914868A - Production of wood club head for golf - 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 method for manufacturing a wood club head for golf with an outer shell made of fiber reinforced plastic (hereinafter abbreviated as FRP), and a method for manufacturing a F'RP outer shell constituting the head body. J: sea urchin, achieving F in formability and quality by devising the means for attaching the mass body.

Conventionally, this type of wood club head has a
As disclosed in the June publication IB51-2143,
Some head bodies have a structure in which the outer shell of the head body is made of FRP and the core is filled with foamed synthetic resin.

However, as is well known, with such conventional types, there are various difficulties in the specific molding method due to the unique and complex shape of the outer periphery of the head. Therefore, in the means of arranging and fixing mass bodies such as a front plate made of hardened FRP etc. on the face part, and sole weight members and back weight members made of metal materials such as brass on the sole and back parts. There were also various problems.

The purpose of this invention is to improve the above-mentioned conventional manufacturing method, and its gist is as follows:
Heat press the 10th FRP molding material using a mold in advance to F
Separately mold a divided body consisting of at least a face portion and a back portion constituting the RP outer shell, and wrap and cover the second FRP molding material constituting the FRP inner shell around the core material within the divided body. The method is characterized in that the backway 1 to members are previously arranged at predetermined positions of the back portion side divided body.

Next, the present invention will be explained based on illustrated embodiments.
As shown in FIGS. 1 and 2, reference numeral 1 in the figures is the head body of a wood club obtained through the manufacturing T-culm described later.

The head body 1 consists of an FRP outer shell 2 and a core material 3 made of foamed synthetic resin, etc. The FRP outer shell 2 includes a first FRP 2a forming a thin outer shell and a relatively thick inner side. It has a laminated structure with the second FRP 2b that constitutes the shell 1', and the face part 1a is made of hardened carbon Tfill.
A face plate 4 having a high elastic modulus with reinforcing fiber t is embedded therein. Further, a sole weight member 5 made of a thin plate metal or the like is provided on the sole portion 1b of the head body 1, while a sole weight member 5 made of a metal material such as brass is provided on the back portion 1C.
1. A back weight member 6 with an hs + bellow is integrally buried in the outer shell FRP 21 at a position corresponding to the head main body back portion 1G. Furthermore, in the figure, 7 is a clubshaft 13 which is inserted and fixed to the neck portion 1d of the head body 1, and 8 is a gap-like protection between the club shaft 7 and the neck portion 1d of the head body (a gap-like protection for protecting the periphery of the IM portion). It is the body.

In order to manufacture the wood club head described in J-, that is, as shown in FIG. A pair of divided bodies 11 made of a first FRP molding material having a predetermined shape and forming a thin outer shell of the head divided into front and rear parts in the direction of ball hitting.
．． 12 are separately thermoformed under as high a temperature and pressure as possible, and the inner surface of the portion 11a corresponding to the back portion of the head body of the rear divided body 11 is made of reinforcing fibers, for example, an unfinished cloth. The back weight member 6 is inserted and integrated in advance using the FRP forming material.

On the other hand, as shown in FIG.
The inner molding material 115 is formed by winding and covering the second FRP molding material 14 in which the reinforcing fibers are impregnated with prepreg or liquid uncured synthetic resin. The portion corresponding to 4. is made of hardened FRP) and the base plate 4 is sandwiched therebetween. As shown in FIG. 6, the IF 415 is fitted into the hollow portion formed by the pair of divided bodies 11.12 using an appropriate mold 16, and at the same time the window hole 11a 112a
By inserting the sole weight member 5 into the body and heat-pressing the two to integrate them, a wood club head as shown in FIGS. 1 and 2 is produced.

By the way, in the above embodiment, when molding the divided body constituting the head outer shell, the first F used is
Leaf pine 1 as reinforcing fiber in RP molding material
~, or using a vermilion cloth to improve surface smoothness and shape followability, while the second layer is wrapped and coated around the core H.
The FRP molding material 1 can be prepared by simply wrapping prepreg, or by inserting a core material into a bag-woven reinforcing fiber body and impregnating it with liquid synthetic resin.
- Laminated relatively thickly by winding resin-impregnated fibers around a core material. Moreover, in the embodiment of this invention,
Although we have shown an example in which the back weight member is integrally embedded during the molding of the divided body, the invention is not limited to this, and the back weight member may be held on the inner surface of the hollow 4T divided body by adhesive etc. after the divided body is molded. You can avoid fixing it. Furthermore,
It is also possible to improve the appearance by coloring the uncured liquid synthetic resin in the FRP molding material used to mold the FRP outer shell.

In addition, the divided body in the embodiment described in -F means that the outer peripheral shape of the head is divided into two or three parts during molding of the FRP outer shell! As explained above, the present invention refers to the material for inserting the second FRP molding material in the die-cutting process and the subsequent process. When the inner molding material, which is wrapped and coated with the FRP molding material constituting the inner shell of the head, is fitted around the core material and integrated under heat and pressure, the back weight member is held at a predetermined position of the divided body. Therefore, 6- It is now possible to perform molding by applying high temperature and high pressure, which shortens the molding time, and allows for high-quality FRP with no residual air bubbles, high density electrification, and a smooth surface f[. Even if defects such as air bubbles (voids), which tend to occur under the molding conditions of the inner shell, occur, the protrusion on the surface can be hidden by the outer shell. can do. In addition, since the inner shell is molded by heat and pressure after the back weight member is fixed to the outer shell in advance, the position of the backway 1 to member can be fixed with high accuracy, which produces effects similar to those of the practical f1. It is.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing one embodiment of a golf wood club head according to the present invention, FIG. 2 is an enlarged cross-sectional view of the main part, and FIGS. 3 to 1 are explanations showing the manufacturing process according to the present invention. It is a diagram. 1...Head body, 2...FRP outer shell, 2a.
...Outer shell, 2b...Inner shell, 3...Core material, 11.12...Divided body, 13...Core material, 14.
...F RI) Molding material, 15... Internal molding material.

Claims (1)

[Claims] A first FRP molding material is hot-pressed in advance using a mold to separately form a divided body consisting of at least a face part and a back part constituting an FRP outer shell, and an FRP inner shell is placed around the core material inside the divided body. The second F RP molding material that constitutes the second FRP molding material is rolled and coated, and the inner molding material is fitted and integrated by heat and pressure. A manufacturing method for a golf wood club head characterized by the following.