GB2162072A - Three-piece solid golf balls - Google Patents
Three-piece solid golf balls Download PDFInfo
- Publication number
- GB2162072A GB2162072A GB08515676A GB8515676A GB2162072A GB 2162072 A GB2162072 A GB 2162072A GB 08515676 A GB08515676 A GB 08515676A GB 8515676 A GB8515676 A GB 8515676A GB 2162072 A GB2162072 A GB 2162072A
- Authority
- GB
- United Kingdom
- Prior art keywords
- core member
- inner core
- support members
- solid golf
- piece solid
- 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.)
- Granted
Links
Classifications
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/02—Special cores
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/005—Cores
- A63B37/0051—Materials other than polybutadienes; Constructional details
- A63B37/0055—Materials other than polybutadienes; Constructional details with non-spherical insert(s)
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/007—Characteristics of the ball as a whole
- A63B37/0072—Characteristics of the ball as a whole with a specified number of layers
- A63B37/0075—Three piece balls, i.e. cover, intermediate layer and core
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B37/00—Solid balls; Rigid hollow balls; Marbles
- A63B37/0003—Golf balls
- A63B37/007—Characteristics of the ball as a whole
- A63B37/0077—Physical properties
- A63B37/0097—Layers interlocking by means of protrusions or inserts, lattices or the like
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B45/00—Apparatus or methods for manufacturing balls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0042—Producing plain balls
-
- A—HUMAN NECESSITIES
- A63—SPORTS; GAMES; AMUSEMENTS
- A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
- A63B2102/00—Application of clubs, bats, rackets or the like to the sporting activity ; particular sports involving the use of balls and clubs, bats, rackets, or the like
- A63B2102/32—Golf
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
- B29L2031/00—Other particular articles
- B29L2031/54—Balls
Landscapes
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Physical Education & Sports Medicine (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
Abstract
An inner core member for a three- piece solid golf ball is of generally cubic, tetrahedral or octahedral configuration and includes a plurality of with the inner core member and support members which are integral symmetrically disposed relative to its centre. The inner core member may comprise a plurality of struts diverging from a common centre (40) for example four struts (30, 31, 32, 33), each directed towards one apex of a notional tetrahedron. The support members serve to locate the inner core member symmetrically within a moulding cavity so that in turn the weight of the inner core member is uniformly distributed within the finished golf ball. <IMAGE>
Description
SPECIFICATION
Three-piece solid golf balls
This invention relates to a method of making three-piece solid golf balls and to golf balls obtained thereby.
As is well known to those skilled in the art, a threepiece solid golf ball consists essentially of:
(a) an inner core member
(b) an outer core member and
(c) a cover member.
The inner and outer core members may be made of identical or similar materials. The cover member may be made of a material different from that of the two core members.
The inner and outer core members are formed into a unitary assembly, suitably by compression or injection moulding. This unitary assembly may then be placed between a pair of preformed "halfshells", the "half-shells" being united under suitable temperature and pressure to form the cover member and thus to complete the golf ball.
Alternatively, the cover material may be injectionmoulded around the unitary core assembly.
The playing properties of a golf ball when struck with a club are directly related to its spin properties.
The spin properties are, in turn, a function of the weight-distribution of the ball itself. It is well established that, for optimum playing properties, the weight of a ball should be symmetrically distributed about its centre of mass.
In manufacturing terms, this means that the unitary assembly of inner and outer core members must be symmetrically located within the cover member. Consequently, the inner core member must be symmetrically located within the outer core member.
This symmetrical location has hitherto been achieved by providing, in a mould of which the mould cavity defines the periphery of the outer core member, retractable pins or similar supports which serve initially to locate the inner core member symmetrically within the mould cavity.
These pins or supports are withdrawn from the mould cavity during the moulding process. Moulds
provided with such retractable pins are complicated to make, expensive to produce and not consistent in operation.
The present invention aims to minimise these disadvantages by eliminating the retractable pins from the mould and instead providing the inner core
member itself with integral supports, whereby the
inner core member can be placed symmetrically
into a mould cavity and maintained in the correct
position relative to the cavity throughout the
moulding process.
Accordingly, the present invention provides a
method of making a three-piece solid golf ball by
moulding an outer core member around an inner
core member and applying a cover member thereto,
in which the inner core member is of generally
cubic, tetrahedral or octahedral configuration and
includes support members, said support members
being integral with, and symmetrically disposed
relative to the centre of, said inner core member.
The present invention also provides a three-piece solid golf ball made by the method described in the immediately-preceding paragraph.
The present invention further provides an inner core member for a three-piece solid golf-ball, said inner core member being of generally cubic, tetrahedral or octahedral configuration and including a plurality of support members, said support members being integral with, and symmetrically disposed relative to the centre of, said inner core member.
In one embodiment of the present invention, the inner core member including integral support members may be made by means of a forming operation (e.g. by moulding).
Alternatively, the inner core member can be formed by taking an "oversized" spherical core and machining the surface to produce the integral support members.
In a second embodiment, the support members may be made separately and attached to an alreadyproduced core member, e.g. by screwing, pegging or by means of an adhesive.
In a further embodiment of the present invention, the inner core member may comprise a plurality of struts diverging from a common centre. A particularly preferred example of such an inner core member comprises four diverging struts having a common centre, the struts each extending towards one apex of a notional tetrahedron.
The inner and outer core members may be made from a formulation including polybutadiene and a metal salt of an unsaturated organic acid, e.g. zinc methacrylate or zinc dimethacrylate, together with fillers and other ingredients well known to those skilled in the art.
Aiternatively, the inner and/or outer core members may be made from an injectionmouldable thermoplastics material.
The inner core member is most conveniently formed by compression moulding in a suitablyshaped mould. The inner core member obtained according to the present invention is then placed in the cavity of a mould which is to form the outer core member (the support members on the inner core member ensuring its symmetrical positioning within the mould cavity) and the outer core formed by injection-moulding, compression moulding or transfer moulding. The integral assembly of inner and outer core members so obtained is then provided, by means known per se, with a cover member.
The present invention will be illustrated, merely by way of example, in the following description and with reference to the accompanying drawing, the single figure of which shows:
a schematic perspective view of an inner core member according to one embodiment of the present invention.
The inner core member comprises four struts 30, 31,32 and 33 diverging from a common centre 40.
Each strut extends from the common centre towards one apex of a notional tetrahedron (shown by dotted lines).
Claims (11)
1. A method of making a three-piece solid golf ball by moulding an outer core member around an inner core member and applying a cover member thereto, in which the inner core member is of generally cubic, tetrahedral or octahedral configuration and includes a plurality of support members, said support members being integral with, and symmetrically disposed relative to the centre of, the inner core member.
2. A method according to Claim 1, in which the inner core member with integral support members is made by means of a forming operation.
3. A method according to Claim 2, in which the forming operation comprises moulding.
4. A method according to Claim 2, in which the forming operation comprises machining of an "oversized" core member.
5. A method according to Claim 1, in which the support members are made separately and attached to an already-produced core member.
6. A method according to any one of Claims 1 to 5, in which the inner core member comprises a plurality of struts diverging from a common centre.
7. A method according to Claim 6, in which the inner core member comprises four struts diverging from a common centre, each said strut being directed towards one apex of a notional tetrahdreon.
8. A method according to Claim 1, substantially as hereinbefore described.
9.An inner core member for a three-piece solid golf ball, said inner core member being of generally cubic, tetrahedral or octahedral configuration and including a plurality of support members, said support members being integral with, and symmetrically disposed relative to the centre of, the inner core member.
10. An inner core memberfor a three-piece solid golf ball, substantially as hereinbefore described, with reference to and as illustrated in the accompanying drawing.
11. A three-piece solid golf ball made by the method of any one of Claims 1 to 8.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB08515676A GB2162072B (en) | 1984-07-04 | 1985-06-20 | Three-piece solid golf balls |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB848416996A GB8416996D0 (en) | 1984-07-04 | 1984-07-04 | Three-piece solid golf balls |
GB08515676A GB2162072B (en) | 1984-07-04 | 1985-06-20 | Three-piece solid golf balls |
Publications (3)
Publication Number | Publication Date |
---|---|
GB8515676D0 GB8515676D0 (en) | 1985-07-24 |
GB2162072A true GB2162072A (en) | 1986-01-29 |
GB2162072B GB2162072B (en) | 1988-07-20 |
Family
ID=26287949
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB08515676A Expired GB2162072B (en) | 1984-07-04 | 1985-06-20 | Three-piece solid golf balls |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB2162072B (en) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994008665A1 (en) * | 1992-10-12 | 1994-04-28 | Nigel Robert Louez | A three piece ball template and method of manufacture |
GB2319482B (en) * | 1995-06-07 | 1999-06-23 | Acushnet Co | Golf ball core |
US6293877B1 (en) | 1998-12-29 | 2001-09-25 | Acushnet Company | Golf ball |
US6485378B1 (en) | 1999-11-23 | 2002-11-26 | Acushnet Company | Golf ball |
US6595874B2 (en) | 1999-11-23 | 2003-07-22 | Acushnet Company | Selectively weighted golf ball |
US7211007B2 (en) | 1999-11-23 | 2007-05-01 | Acushnet Company | Golf ball having visible non-spherical insert |
WO2015184126A1 (en) * | 2014-05-30 | 2015-12-03 | Nike Innovate C.V. | Golf ball with ground down medial layer |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB234713A (en) * | 1924-11-18 | 1925-06-04 | Augustus Sherwood Chatfield | Improvements in playing balls |
GB1321270A (en) * | 1969-10-22 | 1973-06-27 | Brunswick Corp | Method of covering a golf ball core |
GB2007581A (en) * | 1977-09-05 | 1979-05-23 | Brooker B F | Ball |
US4264075A (en) * | 1975-08-07 | 1981-04-28 | Princeton Chemical Research, Inc. | Two piece molded golf ball |
-
1985
- 1985-06-20 GB GB08515676A patent/GB2162072B/en not_active Expired
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB234713A (en) * | 1924-11-18 | 1925-06-04 | Augustus Sherwood Chatfield | Improvements in playing balls |
GB1321270A (en) * | 1969-10-22 | 1973-06-27 | Brunswick Corp | Method of covering a golf ball core |
US4264075A (en) * | 1975-08-07 | 1981-04-28 | Princeton Chemical Research, Inc. | Two piece molded golf ball |
GB2007581A (en) * | 1977-09-05 | 1979-05-23 | Brooker B F | Ball |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1994008665A1 (en) * | 1992-10-12 | 1994-04-28 | Nigel Robert Louez | A three piece ball template and method of manufacture |
US5603497A (en) * | 1992-10-12 | 1997-02-18 | Louez; Nigel R. | Three piece ball template |
GB2319482B (en) * | 1995-06-07 | 1999-06-23 | Acushnet Co | Golf ball core |
US6293877B1 (en) | 1998-12-29 | 2001-09-25 | Acushnet Company | Golf ball |
US6485378B1 (en) | 1999-11-23 | 2002-11-26 | Acushnet Company | Golf ball |
US6595874B2 (en) | 1999-11-23 | 2003-07-22 | Acushnet Company | Selectively weighted golf ball |
US6929567B2 (en) | 1999-11-23 | 2005-08-16 | Acushnet Company | Selectively weighted golf ball |
US7211007B2 (en) | 1999-11-23 | 2007-05-01 | Acushnet Company | Golf ball having visible non-spherical insert |
US7435192B2 (en) | 1999-11-23 | 2008-10-14 | Acushnet Company | Golf ball having visible non-spherical insert |
WO2015184126A1 (en) * | 2014-05-30 | 2015-12-03 | Nike Innovate C.V. | Golf ball with ground down medial layer |
Also Published As
Publication number | Publication date |
---|---|
GB2162072B (en) | 1988-07-20 |
GB8515676D0 (en) | 1985-07-24 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
US4203941A (en) | Ball and method for making it | |
US4355808A (en) | Weighted, inlaid golf iron and method of making same | |
US4809977A (en) | Golf club set with alignment features | |
JP2914233B2 (en) | Golf ball and golf ball molding mold | |
US4872683A (en) | Golf club putter | |
US5018741A (en) | Golf ball | |
CA2004916A1 (en) | Multi-piece golf balls and methods of manufacture | |
JPH09663A (en) | Golf ball mold and golf ball | |
US4267217A (en) | Ball | |
US6179732B1 (en) | Golf ball and golf ball marking method | |
GB2316649A (en) | A method for the combined injection and compression molding of golf balls | |
GB2162072A (en) | Three-piece solid golf balls | |
US7547258B2 (en) | Golf ball | |
US6093360A (en) | Golf ball injection mold and method for injection molding golf balls | |
JP2000237352A (en) | Production of golf ball | |
US4393619A (en) | Doll eye having insert forming the iris | |
NZ212623A (en) | Three-piece solid golf ball with cubic,tetrahedral or octahedral core | |
US3937467A (en) | Billiard ball | |
JP4120732B2 (en) | Golf ball mold and golf ball | |
JP2904737B2 (en) | Golf ball cover material and golf ball | |
US3759480A (en) | Two-piece plug for rotational casting process for forming suction cup integral with the molded article | |
JP2000237351A (en) | Production of golf ball | |
EP1084736A1 (en) | Uniformly weighted golf ball | |
JPH0412777A (en) | Wood golf club head and its production | |
GB2227671A (en) | Golf ball with outer covering layer |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |