JPS59194766A - 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] This invention relates to fiber-reinforced plastics (1"
Regarding the manufacturing method of a golf club head with an outer shell made of FRP (abbreviated as RP), in order to mold the FRP outer shell that constitutes the head body, the core component material inserted into the mold is positioned and +31 By applying a gouge to the fat feeding means, FRP molding green material (referring to the reinforced fibers impregnated with uncured liquid synthetic JMi fat for the matrix and further semi-cured as necessary) This prevents misalignment of the core structure due to pressure during feeding of the material, and improves moldability.

This kind of Utsudo Craft Head was produced by the Special Publication Act in 1977-21 =
As disclosed in Japanese Patent Application No. '136, it is known that the outer shell of the head body is made of FI-P and the core is made of a core-constituting phase made of foamed synthetic resin or the like.

When manufacturing a club head with such an outer shell structure, a raw material for FRP molding such as prepreg is added by hand, such as by hand, around the core component material that has been separately molded into the shape of the head core in advance. A method has been proposed in which the material is obtained by inserting the material into a mold consisting of a desired split mold, clamping the mold, and performing hot pressure molding.

However, with such conventional molding methods,
Because the volume of the head circumference cutting method in the mold is constant, if the volume of the pre-formed head molding material is too high due to manual loading, etc., the monthly charge for FRP molding will be If the pressure and force used for molding varies and is insufficient, it may cause insufficient adhesion between the layers or the formation of air bubbles between the layers or on the surface of the molded product if the FRP molding grit is laminated in multiple layers. In case of excessive quantity, +: when clamping the mold.
' +q p Part of the raw moon for molding is placed on the molding surface of the mold.
This creates a sticky substance on the surface of the molded product, which not only requires time and effort for surface finishing after molding and deteriorates crystallinity, but also causes ff3dtA,
There is a problem in that a part of the reinforcing fibers made of Ml and abrasive grains are cut, which reduces the overall strength of the head.

In addition, in order to compensate for the drawbacks mentioned in 1., the core component is inserted into the mold in advance, and the gap formed between the inner circumferential wall surface of the mold and the outer circumferential surface of the core component is filled with A regular bulk molding compound (hereinafter referred to as -1. , this is abbreviated as BMC) or sheet molding compound (hereinafter referred to as
This is called SMC (abbreviated as SMC) [・"R1'" It has been proposed to use a molding method such as injection molding in which raw material for molding is fed and hardened.

However, a drawback of this type of molding means is that the positioning of the core component within the mold is difficult. A plurality of spacer support legs may be provided protruding around the 1. In the former case, traces of the supporting legs appear on the surface of the molded product, and in the latter case, the marks of the supporting legs appear on the surface of the molded product, and in the latter case, the FRP molding part formed on the mold The feed inlet for the green material is necessarily opposed to the core component 2, and therefore, the feeding pressure when feeding the raw material for molding directly acts on the core component material. However, the structure of the core part is easily damaged, which not only adversely affects the strength 1.1 of the FRF' outer shell, but also causes problems such as molding defects.

The purpose of this invention is to solve the drawbacks of injection molding and other molding methods as described in (1) above. The gap between the outer circumferential surface of the core component and the inner circumferential wall j111 of the mold is
'1. 17 pieces of shell, 1 piece containing 10 pieces (soil S)
Inject the molding soil J□, l consisting of i＼・10 and harden and mold the core component material.
The mold h1 is inserted into the mold and its base is the mold h1 of the mold.
I-Rr' molding material (・A
Delivery of 1. ) is supported through Vi through the donkey l;, and then the I'R1'' molding grout is fed from the 1'' portion into the inner surface of the forming mold Aii through the feeding cylinder. be.

Hereinafter, this invention will be explained based on a large example shown in the drawings.
As shown in FIG. 1, reference numeral 1 in the figure is a head body of a golf wood club according to the present invention, which has been manufactured by a manufacturing process that will be described later. The head main body 1 is formed of an outer shell 2 made of Ichikawamata P and a core (23) constituting the core part, and the core material 3 is made of a foamed synthetic resin made of polyurethane NL resin or the illustrated example 1.) is made of hollow microspheres 31 of inorganic material such as glass; A hollow portion 1 having a circular cross section from the head sole surface 1a side to the second surface side is formed in the center of 3. Also, 5 in the figure is i'
+ij head main heli, 1 11 spherical surface 1. l) 1・
1) The face plate made of a hardened I"l<l' with carbon fiber as a reinforcing fiber immediately installed on the outside h9q, and a sole brake provided with the sole n1i1al of the aforementioned Honda.

That is, in order to manufacture the above-mentioned club 7-rad according to the present invention, as shown in FIGS. Shape. At the same time, the core structure (the center R of the former 1 has a large diameter and a small diameter upward from the bottom side corresponding to the head sole side) is formed with steps (1) 12a in two ways, wide and narrow. The holding hole 12 is inserted through the holding hole 12, and the cylindrical part 13a of the feeding cylinder 13 for raw material for RP molding is inserted into the holding hole 12. Step 11
jb parts ] 2 a and ] 3 a, and are supported so that the core component 11 does not shift downward relative to the feeding tube 13 (see FIG. 2).

Next, such a head core molding phase is inserted into a mold 1. The base 1311 side of 13 is clamped and fixed with the side protruding to the outside.
11;
・Position and fix the core part so that a gap 16 corresponding to the thickness distribution of the head outer shell is formed between the inner circumferential wall surface 1=ia and 15a of 1.15. (See Figure 3).

At this time, FR1 held between molds 1 and 1.15]
M around the base of feeding cylinder 13 for R1 raw material], '3+]
An air vent hole 17 that communicates with the void 16 is formed (note that this air vent hole 17 can be formed between the base 1:(b of the feeding cylinder 13 and the mold 14.15 without any special setting). This effect may be achieved by the gaps that occur).
In addition, a hardened face plate made of Ft<p, a weight part, etc., is attached to the core component 11 or the part of the mold 171.1S that corresponds to the head ball hitting surface, bank surface, sole surface, etc. Leave it in place temporarily.

In this state, F protruding to the outside of the mold 14.15
Using the feed tube 13 for raw material for RP molding as a cylinder, a 17-inch raw material 19 made of BMC or sh. , 1jij entry 1.1) The L1 part 13a side of 13 is fed into the gap 1G in the mold 1.1.15, and the air in the gap 1G is)) 1j
The air vent hole 17 is filled while being pushed out and hardened and molded (see Part 1, Part 1).

After molding, the feed section 1:( is pulled out and removed, and a light filler is buried in the open I-1 part of the molded product, and then the sole plate etc. are removed. As a result, the love head is divided by 1:j as shown in FIG.

Accordingly, the manufacturing means according to the present invention described in 1. (Accordingly, the 11 part 13a of the cylindrical feeding cylinder 13 of the main phase for FRP molding is exposed inside the mold 1.1.15, Part 1
The core component phase 11 is supported in a penetrating state on the outer circumferential side surface of 3a, and the core component phase 11 is inserted into the mold 14.1.
1iij entry cylinder 1 which is pinched by the mold clamping action of 5
3 is fixed, and the feeding tube 1...1 is positioned 1.
part]: (a gap 16 for head outer shell molding formed between the inner circumferential wall i'rii of the mold 14.15 and the outer circumferential surface of the core structure $41+) F''l<)' Molding raw material 1
! Since it is made by sending J, 111'' entry cylinder 12:
[-1 part 1: (The open [] part of a is always mold 1...1
．． 1! -) is oriented toward the moon, and 1.'R1' molding raw material large time feeding input does not directly act on the core ti'li composite material 11, and the core component material] 1 is , feeding cylinder 1; (I of
- 1 capital 1:3a to p, 7I step 1:I part by F
Since the R11 molding material is locked so that it does not move in the J direction (which is indirectly affected by the pressure at the initial stage of feeding), the core component can be kept in a stable state in the mold. It becomes possible to position.

By the way, in this invention 'ζ is used I'' R1:
'Molding phase 4/J is, for example, EpoN [H1] with carbon fiber as the main liquid, or 12-',) (1
111111, for example 13 shouts 11 matoko (Sat 2 ”,)
tntn chopped long run 1, 30 near 0-
G (1:/1. t', L example Eva 50:50:5
f) (+, 'i fat amount: 1 & loss amount)) R4 is increased, and the mixing ratio of the microspheres and epoxy cedar fat that kills the core structure A and 4 is as follows. is 3 (1: '7
(, 1 is used.

Furthermore, the specific molded strip 1'1 of the head book 14 (
For example, a void 111 formed in a mold;
1 is 2.5m+l+, the feeding pressure of the raw material for F RP molding is 50kB' / Cl117, (1 of 11 parts of the side fat feeding cylinder) the diameter is 2 (l nun, the hardened strip 1'1 is I tl +) 'C・20 minutes, and under these setting conditions, the resin feeding cylinder is pulled out and removed. (This is preferably set after semi-curing.)

In addition, in this invention, the core component phase is F''I<T
, 'When making the 1] part of the feeding cylinder of raw +4 for molding into a penetrating support j, the hole penetrated through the core component phase should be stepped into two wide rods (
Form the outer circumferential surface of the 1-1 section of the feeding cylinder with a step 1 so as to engage the shape of this retaining hole. However, this is not limited to this, and even if both sides are engaged,
The functions and effects of this invention can be fully anticipated. Also,
Either the hollow part of the inlet f'+ij that is removed by drawing out after molding is left as it is, or this hollow part i is foamed and synthesized (
+81 fat may be filled or a weight part shrine may be buried as necessary.

As explained above, the present invention is directed to the 1'' portion 1 of the feed tube of F Rr' molding material (.
The core component material is positioned by passing through the support 1.・This is characterized by the fact that the core component material (hereinafter referred to as "F" 11 F') is not applied directly to the molding raw material for forming the core 1119. By stabilizing the positioning within the mold, by reliably preventing molding defects caused by conventional misalignment, and by improving the strength characteristics of the PR'P outer shell, etc. , moldability (has a sagging effect).

4, f%l iro no simpleIjXsuKGL disciple 1
The figure is a cross-sectional view of a mounting part showing an embodiment of a golf club head according to the present invention, and FIGS. 2 to 4 are explanatory views showing the manufacturing process.

1]... core component phase, ]la... outer peripheral surface, 1
2... Holding hole, 12a... 1: Father 1/j part, 13... Feeding cylinder, 13a...]'' part, 1. : (b...Base, 1, 1.15...1 mold, 14a,) 5a...Inner circumference '3+l1ii, I G
...-void,] '7...air vent hole, 18...
・Piston conversion, 1...FI P molding birth 1b 14 Procedures Supplementary City Masu Showa 5; June 6, 1982 Special Application No. 70784? 0 Name of the invention Golf JI Tontz) S Club head manufacturing method 3, Relationship with the case of the person making the amendment Patent applicant name <40'7) E1 Honkyo Musical Instrument Manufacturing Co., Ltd. 4,
Agent 5, Daily amendment order (voluntary) 6, Column for detailed explanation of the invention subject to amendment, Diagram for brief explanation of drawings
surface.

°7. Contents of amendment (1) Details - 1) "5" on the 9th line of page 7 is corrected to "6", and "16" on the 12th line of the same page is corrected to r5J.

(2) Page 12 of the same page (line 3 “1 of 1, 1
Insert the following sentence between and "Also."

[Furthermore, the core part according to the present invention (11 growth marks and feeding 1"1
As a means of connecting the pond with Te1, instead of forming a step 1:1 on the retaining hole penetrating the core component and on the outer circumferential side of the feeding cylinder and butting them together, the fifth (As shown in FIG. 3, a convex portion 111, preferably an annular shape or the like, is formed on the surface side corresponding to the lower surface side of the head of the core component phase 11. Refer to FIG. 5.) The protruding portion 111 is placed in the mold 1.
By pressing against the inner circumferential walls 1, 4a and 15a of the cavity of 1.15 (see i16 and 1), the core structure 4411 is created by the pressure applied when press-fitting the FRP molding material 0
It can also prevent movement.

(3) Lines 3 to 7 on page 13 are corrected as follows. 1
Note 1 - Figure 1 is a cross-sectional view of essential parts showing one embodiment of a golf club head according to the present invention, and Figures 2 to 1 are
The figure is also an explanatory diagram showing the production 1 [culm]. Figs. 5 and 6 are explanatory diagrams showing other embodiments of the production step according to the present invention. ”(・
J) In the attached drawings, 1.5-1 and 1.6-1 are added as shown in the attached sheet.

Procedural Amendment Mr. Zan, Commissioner of the Japan Patent Office, 1. Indication of 1r 1984 Special Patent Application No. 70, No. 84
Manufacturing method for golf V-club heads 3, person making the correction (Relationship with '1' +!j Revised applicant's name (
4 o'? ) [1 Hon Musical Instruments Manufacturing Co., Ltd. 11 Agent proceedings 11 Official document July 13, 1981 Commissioner of the Patent Office 2 Name of the invention Method for manufacturing golf wood club heads 3, ? Name of the patent applicant (407) Nippon Gakki Mfg. Co., Ltd. 4, Agent address 7, Minami-Aoyama-chome-1'1, Minato-ku, Tokyo? I
m Correct contents (1) Amend the claims as shown in the attached sheet.

(2) From the outside of page 5 of the statement box, lines 15-17...
``...Appearance'' is corrected to ``It is possible to make it appear from the outside, but in the former case, traces of the spacer supporting legs will appear on the surface around the molded product''.

(3) In lines 11 to 14 of page 16 of the same ff, [the core 414 is supported...] is changed to "the core component is [R1
] A through-support is provided at the mouth of the feeding tube for the raw material for molding.''

(4) On page 7, lines 3 to 7, ``1'' is replaced with ``1'' as shown in the figure, ``Synthesis in which hollow microspheres 31 of inorganic material such as glass are mixed. It is composed of a cell-containing synthetic resin made of resin or a low melting point metal, and is corrected to J.

(5) From line 18 on page 7 to line 6 on page 8, [Support the head sole surface side] has been changed to "same number upwards from the bottom side corresponding to the head sole surface side." By passing through the holding hole 12 formed by the plastic molding, and inserting a cylindrical feeding tube 13 for raw material for FRP molding made of metal or the like into the holding hole 12, the core component material 11 is It should be supported so as not to shift in the longitudinal and lateral directions with respect to the feeding cylinder 13.''

(6) On page 10, lines 14-20, “Moreover...
・It becomes possible. In addition, the core component 11 is engaged so that it will not move in the front-rear direction and the left-right direction even if pressure is applied indirectly by the feed tube 13 when raw material for FRP molding is fed. Even if the pressure at the time of feeding the raw material for FRP molding acts in the axial direction of the feeding cylinder, the direction of action is F
Since the direction is limited to the direction opposite to the feed direction of the raw material for RP molding, the core component 11 only needs to be supported in one direction. It becomes possible to position the object in the same state. ” he corrected.

(7) Page 12, lines 4-5 [Both... can be done.

] is the effect of preventing movement in the axial direction of the feed tube even if the spacer is inserted into the gap only on the moving side of the core component in the direction of the feed tube sleeve or sleeve direction. I can go far in advance. Correct j.

(8) Page 12, line 9 [... is also good. '' is followed by ``Also, if the part particles are low melting point metals or other meltable materials, these parts can be melted and discharged to adjust the weight.''

2. Claims (1) A core component is inserted into a mold in advance, and += R is inserted into the gap between the outer peripheral surface of the core component and the inner peripheral wall surface of the mold.
When the green material for P-molding is fed and the head outer shell is hardened and molded, the core component is supported through the opening of the feeder for the FRP green material inserted into the mold. A method for manufacturing a wood club head for golf, characterized in that the green material for FRP molding is then fed into the gap in the mold through the feeding cylinder.

(2. A patent for the golf wood club head according to claim 1, characterized in that the core component is made of a cell-containing synthetic resin.

Claims (1)

[Claims] (1) The core component phase is inserted into a mold in advance, and F R is inserted into the gap between the outer peripheral surface of the core component +1 and the inner peripheral wall surface of the mold.
When curing and molding the head outer shell by feeding P molding soil (. The molding soil P゛I-<P
9. A method for manufacturing a golf wood club 7 head, in which feeding the head into the inner gap of the molding mold is considered as blasphemy. (n) '4! The golf wood club head according to claim 2, wherein the core component is made of a cell-containing synthetic resin. (3) In the method for manufacturing a golf wood club head as set forth in claim 2, the air-cell-containing synthetic resin is a synthetic resin (A+ fat mixed with hollow microspheres of an undefeated material). (=1.) In the method for manufacturing a golf wood club head according to any one of Items 1 to 3 of the Patent Nrl Requested Scope, the feeding tube for the green material for FRP molding is provided. is inserted into the mold from the bottom middle heat section side corresponding to the heradosole side of the core structure toward the inside of the mold 7'F3. (5) Scope of Patent iH1'j In the method for manufacturing a golf club head according to any one of Items 1 to 15, a locking portion is formed on the outer circumferential side of the feed cylinder of the raw material for FRP molding. A manufacturing method characterized by