JPS592766A - Production of wood club head or 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 provides a golf wood club head 2 having an outer shell made of fiber reinforced plastics (hereinafter abbreviated as FRP).
Regarding the manufacturing method, the moldability and workability are improved by devising a method for molding the FRP outer shell that forms the head body.

In general, this type of wood club has a head body made of wood such as persimmon or maple that is processed into the desired shape, a face plate made of ABS resin or the like on the hitting surface, and a sole or back made of brass, etc. It is well known that the inertia can be increased and the flight distance can be increased by providing a mass body such as a wheel plate or pack weight.

However, such conventional wood club spacing has become expensive due to the rising cost of materials due to the difficulty in obtaining raw wood, and the sophistication of processing technology due to the complexity of the shape. The decline was inevitable.

Therefore, in view of the drawbacks of the so-called wooden club heads mentioned above, as disclosed in Japanese Patent Publication No. 51-21436, a club head made of an FRP outer shell structure in which the core of the head body is filled with foamed synthetic resin. Although wood-type club heads have been developed, as is well known, there are various difficulties in manufacturing them due to the complexity of the head shape, and at present they have not been put into practical use.

The purpose of this invention is to embody the manufacturing means of the prior art described above and make it practical. A core mold made of a low melting point alloy corresponding to the core of the head is fixed in advance, and then the core mold fixed to the rod-shaped jig is molded into a mold having a desired head external shape together with an FRP molding material forming the head outer shell. After placing the core mold in the cavity of the mold and hot-pressing it, the core mold is melted by heating and eluted to the outside to form a hollow head shell.A sealing material is applied to the outer surface of the core mold in advance. The invention is characterized in that the 7-ruly resin remains so as to form the inner circumferential layer of the hollow part of the head shell after core-type elution.

The following description will be made based on the illustrated embodiment.

As shown in FIGS. 1 and 2, numeral 1 in the figures represents a hollow head body. The head main body 1 is formed of an outer peripheral shell layer 2 made of FRP and an inner peripheral layer 3 made of a knoll material such as a synthetic resin film or a synthetic resin film, and has a neck portion 1a.
A club shaft 4 is inserted and fixed to the
Before the impact 1b, there is a face plate 5 made of ABS resin, etc.
Mass bodies such as a sole weight member 6 and a back weight part 7 made of metal such as brass are fixed to the sole surface IC and the back surface 1d by manufacturing means described later. In addition, 8 in the figure is a plug that closes the opening on the insertion end side of the club shaft 4 which is inserted into and fixed to the neck part 1a of the head body l, and 9 in the figure is a plug body that is inserted into the neck part 1a of the head body l and the club shaft. This is a protector that protects the attachment part with 4.

That is, in order to manufacture the above-mentioned wood club head, as shown in FIGS. (In this case, a protector 9 is inserted and fixed in advance to a portion corresponding to the head neck portion of the club shaft) and is made of a low melting point alloy that is separately shaped into the shape of the core of the head body. Elutable core type 1
1 is supported and fixed with the tip 10a of the rod-shaped jig 10 completely protruding toward the sole surface, and the outer surface of the core mold 11 is made of a synthetic resin film or a coating formed by applying a synthetic resin liquid. After covering the seal 12 in advance, an FRP molding material 13 (indicated by a broken line) is wrapped around it (see FIG. 3). Next, the core mold 11 is placed in a cavity 17 having the outer peripheral shape of the head of a mold 16 consisting of a pair of left and right split molds 14.15, and a rod-shaped jig is formed by the split molds 14.15 during mold clamping]0 tip 10 of
After positioning and fixing with the clamping action of a and the protector mounting base, hot press molding is performed (see FIGS. 4 and 5). After releasing the mold, the core mold 11 is heated and melted and discharged to the outside to form the head body into a hollow outer shell.
2 as the inner peripheral layer of the hollow portion, and cut off the tip 10a of the rod-shaped jig (club shaft) that protrudes toward the sole surface of the head body 1 (see Fig. 6).
, and by sealing the open end thereof, the wood club head shown in FIGS. 1 and 2 is obtained.

By the way, BMOXsMC or Zorizoreg is used as a material for FRP molding, and its reinforcing fibers are composed of an appropriate combination of carbon fiber, glass fiber, boron, or Kepler, or a single use of carbon fiber or glass fiber. Furthermore, as a means of placement in the mold, on the outer peripheral surface of the core mold that forms the core of the head body in advance,
It is possible to wrap belt-shaped cloths, mats, or sleeves with reinforcing fibers by wrapping them, or to wrap the reinforcing fibers around a core and then impregnating them with a matrix synthetic resin liquid. It is also possible to arrange the face plate, sole weight member, back weight member, etc. together with the FRP molding material, and to integrate the entire head at the same time as hot-press molding the head.

As explained above, in this invention, a core mold made of a low melting point alloy corresponding to the core of the head body is fixed in advance to a rod-shaped jig corresponding to the club shaft shaft, and then the outer surface of the core mold is fixed. After being coated with the sealing material, it is placed together with the FRP molding material in the cavity of a mold having the shape of the outer periphery of the head, and hot-pressed. After molding, the core mold is heated and melted and eluted to the outside to form a hollow body of an FRP outer shell. By coating the core mold with a sealing material, when the core mold is eluted, the molten metal made of a low melting point alloy melts into the FRP.
It has excellent practicality, as it does not penetrate into the outer shell, reliably prevents loss of expensive low-melting point alloys, and reduces costs by improving productivity and mass production. It is effective.

[Brief explanation of the drawing]

FIG. 1 is an explanatory view showing one embodiment of a golf wood club head according to the present invention, FIG. 2 is an enlarged cross-sectional view, and FIGS. 3 to 6 are explanatory views showing manufacturing states. 1...Head body, 2...FRP outer shell layer, 3...Inner circumference layer, 4...Club shaft, 5...Face Face plate, 6... Sole weight part, 7... Back weight member, 10... Rod-shaped jig, 11... Core mold, 12... ... Seal phase, 13... FRP molding material, 14.15.16... Molding mold, 17...
·cavity. Figure 3

Claims (1)

[Claims] (1) On a rod-shaped jig corresponding to the shaft of the club shaft,
A core mold made of a low melting point alloy corresponding to the core of the head body is fixed in advance, and then the core mold fixed to the rod-shaped jig is molded into the desired head external shape together with the FRP molding material that forms the head outer shell. The core mold is placed in the cavity of a mold consisting of a split mold, and after hot pressure molding, the core mold is heated and melted and eluted to the outside to form a hollow head outer/shell. A method for manufacturing a wood club head for golf, characterized in that the surface is coated with a sealing material in advance. (2. In the method for manufacturing a golf wood club head as set forth in claim 1, the sealing material is left to form an inner circumferential layer in the hollow part of the head outer shell after core mold elution. A manufacturing method characterized by