EP0593486B1 - Golfschlägerkopf - Google Patents

Golfschlägerkopf Download PDF

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Publication number
EP0593486B1
EP0593486B1 EP91920330A EP91920330A EP0593486B1 EP 0593486 B1 EP0593486 B1 EP 0593486B1 EP 91920330 A EP91920330 A EP 91920330A EP 91920330 A EP91920330 A EP 91920330A EP 0593486 B1 EP0593486 B1 EP 0593486B1
Authority
EP
European Patent Office
Prior art keywords
golf club
wood
club head
composite material
head
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP91920330A
Other languages
English (en)
French (fr)
Other versions
EP0593486A1 (de
Inventor
Benoît VINCENT
François Le Bel Coster VIOLLAZ
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TaylorMade Golf Co Inc
Original Assignee
TaylorMade Golf Co Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TaylorMade Golf Co Inc filed Critical TaylorMade Golf Co Inc
Publication of EP0593486A1 publication Critical patent/EP0593486A1/de
Application granted granted Critical
Publication of EP0593486B1 publication Critical patent/EP0593486B1/de
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B53/0466—Heads wood-type
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B60/00—Details or accessories of golf clubs, bats, rackets or the like
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B2209/00—Characteristics of used materials
    • A63B2209/02—Characteristics of used materials with reinforcing fibres, e.g. carbon, polyamide fibres
    • A63B2209/023—Long, oriented fibres, e.g. wound filaments, woven fabrics, mats
    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B53/00—Golf clubs
    • A63B53/04—Heads
    • A63B53/0416—Heads having an impact surface provided by a face insert

Definitions

  • the present invention relates to a golf club head, and more particularly, a "wood" type head.
  • the clubs used by golfers from the tee or teeing ground to carry the ball for long distances are called the "woods".
  • the "woods” were built entirely from wooden materials such as persimmon, or other varieties. These clubs are still appreciated by many players, but are not very tolerant, given the low density of the material used, and its homogeneous distribution behind the impact face of the club head.
  • the wood-metal appeared, a club taking the form of wood, but whose head is entirely made of steel.
  • the wood-metal generally comprises a hollow steel head, generally produced by lost wax casting.
  • the mass which is mainly distributed around the periphery of the impact face, gives the club a tolerance much higher than that of conventional "woods". This tolerance concerns both the angle of departure of the ball, also called “loft” angle, defining the vertical trajectory of the ball, as the deflection of the ball, that is to say the lateral trajectory of the ball .
  • a first disadvantage of wood-metal concerns the unpleasant sensations felt by the player during impact, due to the metallic contact of the face on the ball.
  • the prior art has proposed golf heads to improve the sensations felt by the player and the speed of restitution.
  • document GB-A-2 162 431 proposes a "wood" type head, the striking face of which is formed by a stack of layers of ceramic and layers of composite materials.
  • the thick walls of this head give it a low tolerance which affects the quality of the trajectories of the balls.
  • the aim of the present invention therefore consists in proposing a golf club head of new construction, in particular of the "wood" type, giving the player good sensations during impact and allowing good work of the ball.
  • Another object is to propose a head whose tolerance is identical to that of a head of a club of the same type of current construction, in particular of wood-metal, but whose stiffness can be chosen in an optimum way, thus allowing d '' increase the contact time of the ball on the impact face, and thus simultaneously the starting speed and the feeling of control of the ball.
  • the present invention provides a golf club type head "wood” externally comprising a lower part intended to rest on the ground, constituting the sole, a substantially flat front part constituting the impact face and a rear part constituting the body; said impact face being produced, in the impact zone at least, in a fiber-based composite material whose elastic modulus is greater than or equal to 230 GPa, characterized in that a closed internal cavity is limited , at least, by the lower and rear walls of a steel shell and by the front part made of fiber-based composite material.
  • the composite material consists of carbon fibers and / or aramid impregnated with a thermoplastic or thermosetting resin.
  • the presence of a steel shell has the effect of keeping the golf club sufficient mass and distributed around the periphery of the head, thereby increasing the tolerance of the club.
  • This tolerance can be optimized on such a construction, and provision can be made for the shell to include an extra thickness of material forming an additional mass of inertia in the region near and behind the periphery of the impact face.
  • This mass can in particular extend in a homogeneous and continuous manner over the entire region behind the periphery of the face, thus conferring tolerance in the vertical and horizontal trajectory of the ball.
  • the head according to the invention is also characterized in that the internal cavity is entirely limited by the lower, rear and upper walls of the steel shell and by the front part made of fiber-based composite material.
  • the club head according to the invention comprises, as shown in FIGS. 1 to 3, representing a "wood” type head (1), a substantially planar front part (AV) constituting the impact face (3), a rear part (AR) constituting the body (4) proper, and a lower part intended to rest on the ground (S), constituting the sole (2).
  • the body (4) is extended on the side by a neck (40) forming an integral part of said body (4).
  • a closed internal cavity (5) is arranged in the head (1). It is limited on the one hand, by the lower wall (60), the rear wall (61) and the upper wall (62) of a shell (6) of high density material, in particular steel, and on the other hand part, through the wall (30) of the impact face (3).
  • the wall (30) is entirely made of composite material. The assembly can in particular be carried out by gluing, screwing or any other means.
  • the applicant intends to use webs woven from carbon and / or aramid fibers impregnated with a thermoplastic or thermosetting resin material.
  • a thermoplastic or thermosetting resin material there are long carbon fibers with high mechanical strength and whose elastic modulus can vary from 230 to 590 GPa and the breaking strength from 2450 to 7000 MPa. Such values are of course higher than those of conventionally known steels.
  • the matrices or resins can be of the polyphenylene sulfide (PPS), polyether imide (PEI), polyether-ether-ketone (PEEK), or epoxy type.
  • the shell (6) comprises an additional thickness (64) of material constituting an additional mass of inertia positioned in a region close to and behind the periphery of the impact face (3).
  • This additional thickness (64) extends substantially over the entire said region, so that the mass is distributed as far as possible, on either side of the horizontal axis of symmetry (X, X ') and of the vertical axis of symmetry (Y, Y '). These axes are perpendicular to each other, and pass through the center of gravity O of the head (1).
  • the axis (X, X ') is parallel to the impact face on the one hand and to the ground on the other hand when the head rests on the sole (2), and the rotation of the head relative to this axis defines the angle of "loft" which directly influences the starting angle of the trajectory of the ball. Consequently, the distribution of an additional mass of inertia on either side of O on this axis, directly influences the tolerance of the club compared to the vertical trajectory of the ball.
  • the vertical axis (Y, Y ') perpendicular to (X, X') defines the angle of the face, and defines the lateral trajectory of the ball.
  • the mass will therefore preferably be distributed in a homogeneous and continuous manner, around the periphery of the impact face (3).
  • This distribution advantageously compensates for the loss of mass due to this type of construction in comparison with a "wood-metal" type construction, the impact face of which is made of high density material. The difference in mass is therefore best used in the regions as defined above.
  • the wall (30) is preferably formed by the stack of several woven sheets of fibers.
  • the particular orientation of the fibers constituting each woven ply is shown in the example of FIG. 5.
  • the wall comprises first plies (31, 310, 311, 312, 313) whose fibers are oriented in a on the axis (X, X ') and on the axis (Y, Y').
  • the wall also includes second plies (32, 320, 321, 322, 323) oriented offset by + 45 ° and -45 ° relative to the axis (X, X ').
  • the wall comprises a successive stack of 10 to 25 layers (31, 32) of fibers.
  • the wall therefore comprises a sequence of a first external layer (31a) of first plies (31) whose fibers are oriented along (X, X ') and (Y, Y'), of a second intermediate layer of second plies (32) whose fibers are oriented at + 45 ° and -45 ° from the axis (X, X '), and a third internal layer (31b) of first plies (31) whose fibers are oriented according to l 'axis (X, X') and (Y, Y ').
  • the second intermediate layer comprises between 3 and 9 layers approximately.
  • the first external layer (31a) is intended to resist the compressive forces due to the impact of the ball and there the third internal layer (31b) is intended to resist the traction forces.
  • the efforts are mainly oriented along the axes (X, X '') and (Y, Y ').
  • the second intermediate layer (32) is intended to resist shear forces at the level of the neutral fiber, mainly oriented at +45 and -45 ° relative to (X, X ')
  • the wall consists of a stack of webs woven of carbon fibers in a balanced way and of epoxy resin.
  • the volume ratio (fibers) / (resin) is equal to 1.
  • the thickness of a sheet is equal to 0.2 mm.
  • the fibers have a modulus of elasticity equal to 230 GPa and a breaking strength equal to 4410 MPa (fiber of the T300J type from TORAY®).
  • the stack consists of a first outer layer (31a) of 6 woven layers of fibers oriented along (X, X ') and (Y, Y') (so-called "0 °, 90 °" orientation); a second intermediate layer (32) of 5 woven sheets of fibers oriented at + 45 °, -45 ° from (X, X ') and a third internal layer (31b) of 6 woven sheets of fibers oriented at 0 °, 90 °.
  • the wall (30) has an elastic modulus according to (X, X ') or (Y, Y') equal to 60 GPa and a breaking strength of 500 MPa.
  • a construction comprising a second intermediate layer of 3 plies or less of fibers only at the level of the neutral fiber does not withstand the impact of the ball sufficiently and leads to a rupture of the wall (30).
  • This rupture phenomenon is also observed in a construction comprising a second intermediate layer of 9 or more woven plies of fibers at + 45 °, -45 ° in partial replacement of woven plies of fibers at 0 °, 90 °.
  • the internal cavity (5) can be filled with a very low density foam, of polyurethane type for example in each of the modes presented.
  • the foam only serves to advantageously modify the noise of the impact of the ball by imparting a duller sound, often preferred by the players.

Claims (4)

  1. Golfschlägerkopf des Typs "Holz", aufweisend außen einen unteren Abschnitt, der dazu bestimmt ist, auf dem Boden aufzuliegen, und der die Sohle (2) bildet, und einen vorderen Abschnitt (30), der im wesentlichen eben ist und die Schlagfläche (3) bildet, und einen hinteren Abschnitt, der den Rumpf (4) bildet, wobei die Schlagfläche zumindest in dem Schlagbereich aus einem Verbundwerkstoff auf Faserbasis hergestellt ist, dessen Elastizitätsmodul größer oder gleich 230 GPa ist, wobei ein innerer geschlossener Hohlraum (5) zumindest begrenzt ist durch die unteren (60) und hinteren (61) Wände einer Schale (6) aus Stahl und durch den vorderen Abschnitt (30) aus Verbundwerkstoff auf Faserbasis.
  2. Golfschlägerkopf des Typs "Holz" gemäß Anspruch 1, dadurch gekennzeichnet, daß der innere Hohlraum (5) integral begrenzt ist durch die untere (60), hintere (61) und obere (62) Wand der Schale (6) aus Stahl und durch den vorderen Abschnitt (30) aus Verbundwerkstoff auf Faserbasis.
  3. Golfschlägerkopf des Typs "Holz" gemäß Anspruch 1 oder 2, dadurch gekennzeichnet, daß die Schale (6) eine Überdicke aus Werkstoff (64) aufweist, welche eine zusätzliche Trägheitsmasse in einem Bereich nahe und hinter der Peripherie der Schlagfläche (3) bildet.
  4. Golfschlägerkopf des Typs "Holz" gemäß einem der Ansprüche 1 bis 3, wobei der Verbundwerkstoff des Kopfes aus einer Stapelung mehrerer Schichten, gewebt aus Kohlenstoff-Fasern und/oder imprägniertem Aramid eines wärmehärtbaren Harzwerkstoffes besteht, dadurch gekennzeichnet, daß die Stapelung erste gewebte Lagen (31, 310, 311, 312, 313) von Fasern, die gemäß einer Achse (X, X') und einer Achse (Y, Y') ausgerichtet sind, und zweite Lagen (32, 320, 321, 322, 323), die um + 45° und um - 45° mit Bezug zu der Achse (X, X') verschoben ausgerichtet sind, aufweisen.
EP91920330A 1991-07-11 1991-11-04 Golfschlägerkopf Expired - Lifetime EP0593486B1 (de)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR9109001 1991-07-11
FR9109001A FR2678843A1 (fr) 1991-07-11 1991-07-11 Tete de club de golf.
PCT/FR1991/000859 WO1993000968A1 (fr) 1991-07-11 1991-11-04 Tete de club de golf

Publications (2)

Publication Number Publication Date
EP0593486A1 EP0593486A1 (de) 1994-04-27
EP0593486B1 true EP0593486B1 (de) 1997-05-28

Family

ID=9415197

Family Applications (1)

Application Number Title Priority Date Filing Date
EP91920330A Expired - Lifetime EP0593486B1 (de) 1991-07-11 1991-11-04 Golfschlägerkopf

Country Status (5)

Country Link
US (1) US5425538A (de)
EP (1) EP0593486B1 (de)
JP (1) JP2544053B2 (de)
FR (1) FR2678843A1 (de)
WO (1) WO1993000968A1 (de)

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* Cited by examiner, † Cited by third party
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Also Published As

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FR2678843A1 (fr) 1993-01-15
JPH06503490A (ja) 1994-04-21
EP0593486A1 (de) 1994-04-27
JP2544053B2 (ja) 1996-10-16
US5425538A (en) 1995-06-20
WO1993000968A1 (fr) 1993-01-21

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