JPS6034470A - 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 golf wood club head whose outer shell is made of fiber reinforced plastics (hereinafter abbreviated as FRP), and in which a head molding material is used to mold the FRP outer shell. The purpose is to generate internal pressure by supplying fluid to the hollow core structure jrA (airbag material) that is constructed, and the F attached around it.
When hot-pressing the raw material for RP molding (referring to the material obtained by soaking strong fibers with uncured liquid synthetic resin for 71~Rix and semi-curing as necessary), add the head molding material in advance. By interposing a holding material in the mold and temporarily fixing other groups 44 such as weight members to the holding material, one part is placed in the mold.
Maintaining the initial shape of the raw material for FRP molding of 15 people,
This is intended to enhance the filling effect in the inner corner f111 of the mold, facilitate the positioning of the way 1 to members, etc., and improve moldability.

As in the invention described in Japanese Patent Application No. 57-132746 filed by Mizude-jin on July 29, 1980, a hollow core is formed separately in advance into the shape of the head core using thermoplastic resin. If necessary, fluid is applied to the hollow part of the core component material to maintain the initial shape.FRP molding raw material is attached around the U-shape to form the head molding material. By injecting high-pressure fluid into the hollow part of the core component into the mold and expanding it, internal pressure is created that presses the raw material for FRP molding toward the inner peripheral wall surface of the mold. A method of generating and molding has been proposed.

However, in this type of method, as is well known, the head shape has a complicated shape that is biased from a circle, and the raw material for FRP molding is also reinforced with fibers, so the core component material Even if high-pressure fluid is fed into the hollow part, it is not only impossible to fill the corners of the mold, especially the parts corresponding to the upper and lower corner edges of the spherical surface of the head J], with the raw material for molding. The rigidity of the core component itself is not sufficient! In addition, it is difficult to reliably maintain and cover the initial shape of the head molding material, which causes molding defects and tends to cause defects such as quality 11 (dropping).

In addition, 1. In another molding method, a core material such as foamed synthetic resin is used in the part A) of the head body, green material for FRP molding is attached around it, and a weight member etc. is attached to the core material. A molding method has been proposed in which other parts are integrally formed by embedding other weight parts, etc., at the same time as molding by stapling, etc., through the raw material for molding (FRI) directly or FRI).
It has been impossible to use this kind of means in the near-back method described above, because holes are formed in the core component material, causing fluid leakage.

This invention aims to eliminate the above-mentioned problems of the prior invention, and its gist is that a hollow core part 4j4 made of a thermoplastic resin that is pre-formed into the shape of a head core part. A head molding material made by adding green material for FRP molding to the periphery of the material is inserted into the mold, the core component material is heated to form a lining, and a fluid is fed into the hollow portion from the mouth end side of the material. When expanding and hot-pressing the raw material for FRP molding, it is necessary to maintain the outer shape of the head between the raw materials for FRP molding! It is characterized in that it can hold the J material and temporarily fix other members such as the way 1 to the member to the shape retaining member.

Hereinafter, this invention will be explained based on the illustrated embodiments. As shown in FIGS. This is the main body of the head. The head body 1 is formed of an outer shell 2 made of FRP and a hollow core material 3 made of thermoplastic synthetic resin configured inside.
The reinforcing fibers of the RP outer shell 2 consist of a plurality of laminated structures, and 7
1 - Impregnated with liquid synthetic resin for RIX and integrally cured and molded. 4 in the figure is a shift insertion hole penetrating through the neck portion 1a of the head body 1, the inner circumferential surface of which is made of FRP forming the outer shell 2, and the insertion hole is A club shaft V-ft 5 is inserted into the hole 4,
It is fixed with adhesive etc. Furthermore, O in the figure is a face surface made of hardened [-1<P (mainly made of carbon uJA fibers as reinforcing fibers) interposed in the FRP outer shell 2 on the ball-hitting surface 1b side of the head body 1. The reinforcing plate 7 is also a reinforcing plate inserted into the FRP outer shell 2 on the side of the sole surface 1C, and the reinforcing plate 8 is temporarily fixed on the retaining material consisting of the reinforcing plate 7.
'A weight member embedded in the RP outer shell 2, 9 another weight member interposed as necessary in the FRP outer shell 2 on the back surface 1d side, 10 a sole play 1-. 11 is embedded in the outer shell 2 of the FRI so that the sole surface 1C side of the core vU3 to which the club shaft 5 corresponds protrudes, and the protruding end surface thereof is drilled and the club shaft 5 is inserted into the hole 12. Inserting and fixing the tip part 5a (1) ~ In the process of use, these parts are clamped during molding for FRP molding to form the outer shell (described later) or attached. J: It is something that can be installed integrally at the same time as the head molding.

In order to manufacture the above-mentioned club head according to the present invention, as shown in FIGS. 3 and 4, a hollow core having a similar shape smaller than the actual head core shape is prepared in advance. The component material 20 is made of celluloid seal 1 or vinyl chloride resin sheet 1 or the like, and has a thickness of 0.3 to 1. O
NV thermoplastic semi-synthetic or synthetic resin is separately molded by blow molding or the like, and the core metal vibrator 21 is fitted to the outer peripheral side surface 20a corresponding to the head neck part of the core component material 20. At the same time, if necessary, the front end 20b of the core component 20 facing the outside through the inside of the core metal pipe 21 is sealed tightly, and a fluid such as air is introduced into the hollow part to temporarily seal it. to maintain internal pressure, and around it,
The raw material for FRP molding that constitutes the head outer shell is wound around F.
i'? At the same time, attach the FRP molding cow (A22) to the part corresponding to the head ball hitting surface, the part corresponding to the head sole surface, and the part corresponding to the head pack surface. As shown in Fig. 3, the way 1 part 23 and the shaft base material 24 are glued or screwed in advance to the predetermined position, and the temporarily fixed reinforcing plate is heated and plasticized with BS resin, etc. A holding shrine consisting of a shape-retaining plate 25 made of resin and a way 1 as necessary
-A metal plate (not shown in the figure) that will serve as a member is sandwiched between the plates, and these are used as shape-retaining members to maintain the initial shape of the entire head.Furthermore, a tentative temporary material that will become a sole plate is placed on the outer surface of the portion corresponding to the sole surface of the head. 26 is attached to form a head forming trA Jml 27.

At this time, as the FRP molding material 22 used, 1-bore resin is preferably used as the liquid synthetic resin for the matrix, and unsaturated polyester resin may also be used. Arrangement of reinforcement that makes up the layers (R construction is mainly made of carbon fiber (known as gelafnite fiber), and if necessary, glass W4 fiber or Kevlar etc. 5-12 sheets weight: 96 bundles of b (7) bag weave cloth
6000 fibers/bundle of fibers m 19 is 3~10
mm, 9 mm or 4 to 7 mm, and is encapsulated over substantially the entire circumference of the core component 11 so as to have a different configuration from the neck portion of the head body, and the core portion 4f4. A portion 11a corresponding to the neck portion of the lumber 11 is covered with another type of bag weave cloth relatively thickly as needed with fiber legs of 32 ends x 3000 strands/bundle, and the ends of the bag weave cloth of both sections are wrapped. While the edges are pressed together so that they partially overlap,
Two to three layers of sateen cloth are used as reinforcing fibers for the outer layer forming the head surface side, and the thickness is 0.4~
1. 0 mm to improve surface smoothness and shape tracking 1i, and the portion corresponding to the upper face of the head body is made of 5 to 15 layers of twisted yarn [1 thread or roving]. It is made by attaching reinforcing fibers made of cloth so as to have a relatively thick thickness of 3 to 8 mm.

Next, the head molding material 27 whose initial shape is maintained by such a shape retaining member 25 etc. is inserted into a mold 28 that holds the sole plate 26 and the outer peripheral shape of the head, and the mold is clamped and simultaneously molded. The core part (14 materials 2
0 is heated to avoid softening, and the frontage end 2 of the portion 20a corresponding to the neck portion of the core component 20 facing the outside through the core metal pipe 21 is exposed to the fluid inlet nozzle 29 at the front end 2 (l + Compressed air is inserted into the hollow part of the component member 20.
High pressure (5 to 15 kg/cm) such as steam or heating oil
2) Fluid F Total supply 1. , core part (surrounding F Rf by expanding the 14-formed shrine 20) raw material for molding 22
Press the mold 28 toward the inner peripheral wall surface 28a of the mold 28 while hot-pressing the mold (see FIG. 4).

After the molding is completed, a foaming compound such as Foam 11 polyurethane resin is added to the hollow part of the core component to adjust the weight of the head body to a predetermined foam density as needed. A resin reservoir is injected and filled with foam (in the illustrated embodiment, the core bar is explained as being hollow), and the core metal vibrator 21 is roughly pulled out, and at the same time, the head neck portion 20a of the core fall component 20 is peeled off and removed. A love head as shown in FIG. 1 is obtained by forming an insertion hole (U in the figure) for the shaft 1 and inserting the club foot 1 into the insertion hole and fixing with adhesive.

In this invention, when heating and softening the core component material, when the expansion means uses one 8111 flow such as compressed air (or separately heated with a pot press or the like, or steam) When using a high-temperature fluid such as, there is no need to separately heat it, and both effects can be achieved.Furthermore, the head molding material is held between the FRP molding material 4A formed by the shape retention method. The members are each formed to approximate the shape of the intervening surface portion, and the intervening position is at least 10,000 yen of the portion corresponding to the ball hitting surface of the head or the radial sole surface. In this invention, as explained above, the raw material for FRP molding constituting the head outer shell is changed to the core structure 4A.
In order to attach the core part 4 (11 parts) to the periphery of the head and heat-press it, the core part 4 (11 parts) is previously hollow-molded with thermoplastic synthetic resin into a shape approximately approximating the desired head core shape. When performing hot-press molding by applying an internal Ll force by expanding with a high-pressure fluid, a shape-retaining member etc. At the same time, attach the retaining material to one month or two.
Since the base material for the head is temporarily fixed in advance, it is possible to compensate for the lack of rigidity of the core component material and maintain a stable initial shape of the head molding material inserted into the mold. As well as applying internal pressure by feeding fluid into the hollow part of the component, F
RP molding tool - I can be reliably filled into the inner corner of the mold, and other parts such as J and way 1 can be inserted and fixed (to ensure dimensional accuracy at the i'x position). It has excellent effects compared to molding 4 (I), such as being easy to maintain.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional view of a main part showing an embodiment of a golf wood club head according to the present invention, and FIGS. 2 to 4 are explanatory views showing manufacturing states according to the same invention. 20... Core component material 22... Raw material for FRP molding (A
23... Member to way 1 24... Shift base material 2
5... Holding material 27... Head molding material 28...
・Molding mold 29...Fluid feed nozzle "...Fluid

Claims (1)

[Claims] (1) A head molding material 1 consisting of a hollow core component made of thermoplastic resin and a plurality of FRP molding raw materials attached thereto is inserted into a mold; When the fluid is introduced into the hollow part of the core part 41+1 to expand it and heat-press the FRP molding material, between the raw material for molding the first plate,
A method for manufacturing a wood club head for golf, characterized by clamping and twisting a retainer to which other members are temporarily fixed in advance. (2. In the method for manufacturing a wood club head for golf according to claim 1, the manufacturing method includes holding (14) in which 4 is a shape-retaining plate material. (3) Claims 1 to 1. Part 2
In the method for manufacturing a golf wood club head according to any one of the above, the holding moon is set at a portion corresponding to the sole surface of the head (1-Rl).
A manufacturing method characterized by sandwiching the raw moon surface for molding. (4) The method for manufacturing a golf wood club head according to claim 1 or 3, characterized in that a member of the way 1 is temporarily fixed to the holder 4A. (5) In the method for manufacturing a wood club head for golf according to any one of claim 3, which seems to be claimed in claim 1, the club A manufacturing method characterized by avoiding temporary fixation of the base material into which the insertion end of the shaft is inserted and fitted. (6) The method for manufacturing a golf wood club head according to any one of claims 1 to 4, wherein the holding portion is a thermoplastic resin plate.