CN101412271B - Mold for golf balls - Google Patents
Mold for golf balls Download PDFInfo
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- CN101412271B CN101412271B CN2008101694283A CN200810169428A CN101412271B CN 101412271 B CN101412271 B CN 101412271B CN 2008101694283 A CN2008101694283 A CN 2008101694283A CN 200810169428 A CN200810169428 A CN 200810169428A CN 101412271 B CN101412271 B CN 101412271B
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Abstract
A mold 2 includes a pair of mold halves (upper mold half 4 and lower mold half 6). A spherical cavity is formed by mating upper mold half 4 and lower mold half 6. A large number of pimples 10 are provided on the cavity face of the upper mold half 4 and lower mold half 6. The upper mold half 4 and the lower mold half 6 have flat plane 14, protrusion 16 and recess 18, respectively. The protrusion 16 projects from the equator Eq. The recess 18 is depressed from the equator Eq. The protrusion 16 includes a part of the pimple 10. The proportion P1 of the number of the protrusion 16 that is adjacent to other protrusion 16 belonging to other mold half distinct from the mold half to which itself belongs, to the total number of the protrusions 16 is equal to or greater than 50%. The proportion Pw of the sum total of the widths of the protrusions 16 measured along the equator, to the entire length of the equator is equal to or greater than 35%.
Description
The application requires on October 19th, 2007 in the patent application No.2007-272347 of Japan's submission and the priority of patent application No.2007-272204, and its full content is incorporated herein with for referencial use.
Technical field
The present invention relates to a kind of golf ball mold.In particular, the present invention relates to a kind of mould, on its concave surface (cavityface), have the cima (pimple) that is used to form indenture (dimple) in a large number.
Background technology
Golf has a large amount of indentures in its surface.Indenture can upset golf at its air-flow around in-flight so that turbulence separation.By making turbulence separation, the burble point of air and golf shifts backward and causes resistance to descend.Turbulence separation has prolonged the gap between the burble point of the burble point of the golf upside that causes by circling round and downside, has therefore strengthened the lift that acts on the golf.Resistance descends and the lift increase is considered to " indenture effect ".Outstanding indenture can more effectively be upset air-flow.
Usually, golf is to form by the mould that use has the first half that has the hemispherical concave surface respectively and a second-class split of Lower Half mould.Suppose that the second-class split of first half mould (or claiming first half mould) concave surface is the Northern Hemisphere of tellurion, and the second-class split of Lower Half mould (or claim Lower Half mould) concave surface is the Southern Hemisphere of tellurion, so first half mould and Lower Half mould under the line face (plane that comprises the equator) combine.Inner surface at mould has a large amount of cimas, and forms indenture by this cima on the surface of golf.Indenture has the shape opposite with cima.
Because mold material (for example, synthetic resin) can be by the outside seepage of parting surface of first half mould and Lower Half mould, along the ambitus branch generation burr on golf surface.Burr can produce along defiber.With the polishing of grinding stone or analog and remove this burr.It is relatively more difficult to remove the burr that produce in the indenture.For the ease of removing burr, go up under the line and do not form any indenture.In other words, the parting surface at mould does not have cima.On the seam of the golf that makes by this mould, formed big loop wire (great circle path).This big loop wire and equator match.When this big loop wire and the part (also can be expressed as " the fastest part " hereinafter) that obtains the maximum peripheral speed of circling round when matching, then can't obtain sufficient indenture effect.Compare with the indenture effect that obtains when big loop wire does not match with the fastest part, the indenture effect that obtains when big loop wire and the fastest part match is poor.Difference between these indenture effects can reduce the aerodynamic symmetry of golf.Big loop wire can further influence the outward appearance of golf.
US2002-94886 (JP2002-159598) discloses a kind of mould, and its parting surface has horizontal plane and inclined plane.In this mould, except parting surface, cima can be arranged on the equator.This mould makes golf have rough seam.This golf does not have big loop wire.Similar mould is also disclosed in US2004/41297 (JP2004-89549).
USP5947844 (JP10-99469) discloses a kind of mould, and it has clasp nail on parting surface.This clasp nail forms indenture on golf.By this mould, can make golf with big loop wire.
USP6123534 (JP11-137727) discloses a kind of mould, and its parting surface has projection.This projection forms indenture on golf.By this mould, can make golf with big loop wire.
Have the golf that the mould on horizontal plane and inclined plane makes according to using at its parting surface, indenture sparsely is positioned near the seam.Aerodynamic symmetry for this golf also has the leeway of improving.Equally, the mould that has clasp nail or projection in use makes under the situation of golf, and their aerodynamics symmetry and outward appearance can not be satisfactory.
Summary of the invention
One object of the present invention is to provide a kind of golf, has outstanding aerodynamics symmetry and outward appearance.
The golf ball mold that is used for according to the present invention comprises the second-class split of a pair of mould.On the concave surface of this mould, has the cima that is used to form indenture in a large number.The second-class split of each mould all has a plurality of the giving prominence to of being protruded by the equator.Each is given prominence to and comprises a part of cima.If it is outstanding adjacent to belong to a kind of outstanding and another kind that belongs to the second-class split of another mould of a second-class split of mould, a described second-class split of mould is different with the second-class split of described another mould, and then described a kind of outstanding quantity and the ratio P1 between whole sum of giving prominence to are equal to or greater than 50%.Ratio Pw between the summation of the outstanding width of measuring along the equator and the total length in equator is equal to or greater than 35%.
The diameter that its part is included in the cima in outstanding is preferably and is equal to or greater than 4.0mm.Outstanding quantity is preferably more than 18 and is below 33.All outstanding height apart from the equator are preferably equal.All are positioned at the diameter of cima that latitude is equal to or less than 20 ° zone and are preferably and are equal to or greater than 4.0mm.
When all were positioned at latitude and are equal to or less than 20 ° the cima in zone by the descending of diameter, the ratio (Dx/Dn) between the average diameter Dn of the average diameter Dx of the cima in top 10% and the cima in bottom 10% was preferably and is equal to or less than 1.15.
All are positioned at the standard deviation of diameter of cima that latitude is equal to or less than 20 ° zone and are preferably and are equal to or less than 0.15.The mutually different multiple cima of diameter is preferably placed in the zone that latitude is equal to or less than 20 °.
The method of golf constructed in accordance may further comprise the steps:
Material is placed mould, and this mould comprises the second-class split of a pair of mould, has the cima that is used to form indenture in a large number on the concave surface of this mould, and wherein: the second-class split of each mould all has a plurality of the giving prominence to of being protruded by the equator; Each is given prominence to and comprises a part of cima; If it is outstanding adjacent to belong to a kind of outstanding and another kind that belongs to the second-class split of another mould of a second-class split of mould, a described second-class split of mould is different with the second-class split of described another mould, and then described a kind of outstanding quantity and the ratio P1 between whole sum of giving prominence to are equal to or greater than 50%; And the ratio Pw between the summation of the outstanding width of measuring along the equator and the total length in equator is equal to or greater than 35%, and
By material is flowed, form indenture with shape opposite with the cima shape in mould.
In one aspect of the method, provide a kind of according to the mould that is used for the second-class split of comprising of golf of a pair of mould of the present invention.On the concave surface of this mould, has the cima that is used to form indenture in a large number.The second-class split of each mould all has a plurality of the giving prominence to of being protruded by the equator.Each is given prominence to and comprises a part of cima.When a second-class split of mould combined with the second-class split of another mould, a kind of outstanding central angle between giving prominence to another kind adjacent thereto all was more than 10 ° and is below 20 °.
This mould comprises:
It is (a) a kind of outstanding,
(b) adjoining another kind is given prominence to giving prominence to (a), and
(c) with outstanding (a) adjoining another kind of again giving prominence to.
Central angle θ 1 between preferred outstanding (a) and outstanding (b) is different with the central angle θ 2 that gives prominence between (a) and outstanding (c).And the quantity that another kind outstanding (b) forms central angle θ 1 outstanding (a) is preferably with ratio P3 between the outstanding entire quantity and is equal to or greater than 50%, and wherein central angle θ 1 and outstanding (a) are with the another kind of central angle θ 2 that gives prominence to (c) formation is different again.
This mould preferably includes with the another kind that belongs to a second-class split of mould outstanding adjoining, and with belong to the another kind of more outstanding also adjoining outstanding of the second-class split of another mould.And the another kind that belongs to a second-class split of mould is outstanding adjoining and and belong to the another kind of more outstanding also adjoining outstanding quantity of the second-class split of another mould and be preferably with ratio P2 between the entire quantity of giving prominence to and be equal to or greater than 50%.
The diameter that its part is included in the cima in outstanding is preferably and is equal to or greater than 4.0mm.Outstanding quantity is preferably more than 18 and is below 33.All outstanding height apart from the equator are preferably equal.All are positioned at the diameter of cima that latitude is equal to or less than 20 ° zone and are preferably and are equal to or greater than 4.0mm.
When all were positioned at latitude and are equal to or less than 20 ° the cima in zone by the descending of diameter, the ratio (Dx/Dn) between the average diameter Dn of the average diameter Dx of the cima in top 10% and the cima in bottom 10% was preferably and is equal to or less than 1.15.
All are positioned at the standard deviation of diameter of cima that latitude is equal to or less than 20 ° zone and are preferably and are equal to or less than 0.15.The mutually different multiple cima of diameter is preferably placed in the zone that latitude is equal to or less than 20 °.
In one aspect of the method, provide a kind of method of golf constructed in accordance, may further comprise the steps:
Material is placed mould, and this mould comprises the second-class split of a pair of mould, has the cima that is used to form indenture in a large number on the concave surface of this mould, and wherein: the second-class split of each mould all has a plurality of the giving prominence to of being protruded by the equator; Each is given prominence to and comprises a part of cima; When a second-class split of mould combined with the second-class split of another mould, a kind of outstanding central angle between giving prominence to another kind adjacent thereto was more than 10 ° and is below 20 °, and
By material is flowed, form indenture with shape opposite with the cima shape in mould.
Description of drawings
Figure 1 shows that the cross-sectional view that is used for golf ball mold according to an embodiment of the invention;
Figure 2 shows that the enlarged drawing of the part of mould as shown in fig. 1;
Figure 3 shows that the perspective view of the second-class split of Lower Half mould of mould as shown in fig. 1;
Figure 4 shows that along the cross-sectional view of the amplification of the line IV-IV of Fig. 1;
Figure 5 shows that the schematic diagram of the golf that use mould as shown in fig. 1 makes;
Figure 6 shows that the front view of golf as shown in Figure 5;
Figure 7 shows that the schematic diagram of the golf that use makes according to the mould of embodiments of the invention 2;
Figure 8 shows that the front view of golf as shown in Figure 7;
Figure 9 shows that the schematic diagram of the golf that use makes according to the mould of embodiment 3;
Figure 10 shows that the front view of golf as shown in Figure 9;
Figure 11 shows that the schematic diagram of the golf that use makes according to the mould of embodiment 4;
Figure 12 shows that the front view of golf as shown in Figure 11;
Figure 13 shows that the schematic diagram of the golf that use makes according to the mould of embodiment 5;
Figure 14 shows that the front view of golf as shown in Figure 13;
Figure 15 shows that the schematic diagram of the golf that use makes according to the mould of embodiment 6;
Figure 16 shows that the front view of golf as shown in Figure 15;
Figure 17 shows that the schematic diagram of the golf that use makes according to the mould of embodiment 7; And
Figure 18 shows that the front view of golf as shown in Figure 17.
The specific embodiment
Next will be with reference to the accompanying drawings according to preferred embodiment describing the present invention.
The golf ball mold 2 that is used for as illustrated in fig. 1 and 2 comprises the second-class split 4 of a pair of mould and 6.In particular, mould 2 comprises second-class split 4 of first half mould (or claiming first half mould 4) and the second-class split 6 of Lower Half mould (or claiming Lower Half mould 6).By making first half mould 4 and 6 combinations of Lower Half mould, can form spherical cavity.On the concave surface 8 of first half mould 4 and Lower Half mould 6, has a large amount of cima 10.The profile of cima 10 is circular.Though only shown a part of cima 10 among Fig. 1, a large amount of cimas 10 are arranged on the whole concave surface 8.Can clearly be seen that in Fig. 1 the parting surface 12 between first half mould 4 and the Lower Half mould 6 is a non-planar shaped.In Fig. 2, when the top of the concave surface 8 of hypothesis first half mould 4 is the bottom of the concave surface 8 of the arctic Pn (referring to Fig. 1) of tellurion and Lower Half mould 6 when being the South Pole Ps of tellurion, what be denoted as that the double dot dash line of Eq describes is exactly the equator.
Figure 3 shows that the perspective view of the Lower Half mould 6 of mould 2 as shown in Figure 1.The parting surface 12 of this Lower Half mould 6 has plane 14, outstanding 16 and cave in 18.Equally as illustrated in fig. 1 and 2, plane 14 forms along equator Eq.Outstanding 16 are protruded by equator Eq.Depression 18 is recessed by equator Eq.Alternately arrange along circumferencial direction by two outstanding 16 groups of forming with by two depression 18 groups of forming.Outstanding 16 quantity is 12.The quantity of depression 18 is 12.Outstanding 16 is identical with the quantity of depression 18.Though show among the figure, first half mould 4 also has similarly a large amount of outstanding 16 and a large amount of depression 18.When first half mould 4 combined with Lower Half mould 6, the depression 18 of outstanding 16 and first half mould 4 of Lower Half mould 6 matched, and the depression 18 of Lower Half mould 6 matches with outstanding 16 of first half mould 4.
Because outstanding 16 of Lower Half mould 6 matches with the depression 18 of first half mould 4, the quantity of the depression 18 of first half mould 4 and Lower Half mould 6 to give prominence to 16 quantity identical.Because outstanding 16 of first half mould 4 matches with the depression 18 of Lower Half mould 6, outstanding 16 quantity of first half mould 4 is identical with the quantity of the depression 18 of Lower Half mould 6.In this mould 2, the quantity of the depression 18 of the depression 18 of outstanding 16, the first half mould 4 of first half mould 4, outstanding 16 and Lower Half mould 6 of Lower Half mould 6 all is 12.This mould 2 has 24 outstanding 16 altogether.This mould 2 has 24 depressions 18 altogether.
As shown in Figure 2, outstanding 16 comprise a part of cima 10.Outstanding 16 outer rim has formed one section circular arc.The profile of outer rim and cima 10 is identical substantially.Because outstanding 16 by equator Eq protrusion, the cima 10 that is included in outstanding 16 is run through by equator Eq.The center of this cima 10 is not included in outstanding 16.
Figure 4 shows that along the cross-sectional view of the amplification of the line IV-IV of Fig. 1.This cross section intercepts along equator Eq.In Fig. 4, two the outstanding 16c and the 16d of two outstanding 16a of plane 14, Lower Half mould 6 of Lower Half mould 6 and 16b and first half mould 4 described.The contiguous outstanding 16b of outstanding 16a.The also contiguous outstanding 16c of outstanding 16a.When two do not exist between outstanding any other when outstanding, with these two outstanding being defined as " vicinity ".
In Fig. 4, what Reference numeral 0 was represented is the central point of cavity.Centre line C L a shown in Fig. 4, CLb and CLc crossing point 0.Centre line C L a passes the center of outstanding 16a at meridian direction.Centre line C L b passes the center of outstanding 16b at meridian direction.Centre line C L c passes the center of outstanding 16c at meridian direction.In Fig. 4, what Reference numeral θ 1 represented is the central angle of giving prominence between 16a and the outstanding 16b.In Fig. 4, what Reference numeral θ 2 represented is the central angle of giving prominence between 16a and the outstanding 16c.
In Fig. 4, what arrow sign W represented is to give prominence to 16 width.Width W is measured along equator Eq.In this mould 2, all outstanding 16 all have identical width W.Mould 2 can have multiple outstanding 16 of the different in width W that has.
This mould 2 can be used to the mold of golf.This mould 2 can be used to pressing mold, jet mould, mold etc.In any said method, material all is placed in the mould 2.Material flows in mould 2, therefore can form the shape indenture opposite with the shape of cima 10.
Figure 5 shows that the schematic diagram of the golf 20 that use mould 2 as shown in fig. 1 makes, and Figure 6 shows that its front view.This golf 20 has a large amount of indenture 22 on its surface.All indentures 22 all are circular.In Fig. 5 and 6, the type of indenture 22 is represented by Reference numeral A～E.This golf 20 has indenture A, indenture B, indenture C, indenture D and indenture E.The quantity of indenture A is 26; The quantity of indenture B is 88; The quantity of indenture C is 102; The quantity of indenture D is 94; And the quantity of indenture E is 14.Indenture 22 on this golf 20 add up to 324.
In Fig. 6, what Reference numeral Ln1 represented is the latitude line of 20 ° of north latitude, and Reference numeral Ls1 represents is the latitude line of 20 ° in south latitude.Golf 20 the surface or on concave surface 8, the zone of being defined by latitude line Ln1 and latitude line Ls1 is the low latitudes zone.Golf 20 the surface or on concave surface 8, the zone except the low latitudes zone is the high latitude zone.In Fig. 5, shown the type of the indenture 22 that is positioned at the high latitude zone.When it is centered close to when being higher than 20 ° latitude, then this indenture 22 is corresponded to " indenture that is positioned at the high latitude zone ".In Fig. 6, shown the type of the indenture 22 that is positioned at the low latitudes zone.When it is centered close to 20 ° or when being lower than 20 ° latitude, then this indenture 22 is corresponded to " indenture that is positioned at the low latitudes zone ".
The shape of indenture 22 is opposite with the shape of cima 10.Indenture A is formed by cima A.Indenture B is formed by cima B.Indenture C is formed by cima C.Indenture D is formed by cima D.Indenture E is formed by cima E.Mould 2 shown in Fig. 1～4 has 26 cima A, 88 cima B, 102 cima C, 94 cima D and 14 cima E.The diameter of cima A is 4.50mm.The diameter of cima B is 4.40mm.The diameter of cima C is 4.30mm.The diameter of cima D is 4.10mm.The diameter of cima E is 3.60mm.
As mentioned above, mould 2 has the cima 10 that is run through by equator Eq.Therefore, the golf 20 that is made by this mould 2 has the indenture 22 that is run through by the equator.On the Eq of the equator of this golf 20, do not form any big loop wire.When equator Eq matched with the fastest part of circling round, the indenture 22 that is run through by equator Eq had improved the indenture effect.This golf 20 has outstanding aerodynamics symmetry.This golf 20 does not have not the big loop wire that coincide with the equator yet.This golf 20 has outstanding outward appearance.
As mentioned above, the contiguous outstanding 16c of outstanding 16a as shown in Figure 4.Outstanding 16a belongs to Lower Half mould 6, and outstanding 16c belongs to first half mould 4.In other words, the outstanding 16a of a second-class split of mould (Lower Half mould 6) that belongs to is adjacent with the outstanding 16c that belongs to the second-class split of another mould (first half mould 4), and Lower Half mould 6 is different with first half mould 4.On the golf 20 that is formed by this mould 2, the indenture 22 that is formed by outstanding 16a belongs to the Southern Hemisphere, and the indenture 22 that is formed by outstanding 16c belongs to the Northern Hemisphere.
Satisfy and followingly require 1 outstanding 16 quantity and give prominence to ratio P1 between 16 the sum for being equal to or greater than 50%.
Require 1: adjacent with the another kind that belongs to the second-class split of another mould that is different from the second-class split of mould that itself belongs to outstanding 16.
According to being equal to or greater than 50% mould 2 prepared golf 20 by ratio P1 wherein, when equator Eq matches with the fastest part of circling round, have great probability to obtain a kind of like this order: indenture 22 back that belong to the Southern Hemisphere are the indentures 22 that belong to the Northern Hemisphere, and also have great probability to obtain a kind of like this order simultaneously: indenture 22 back that belong to the Northern Hemisphere are the indentures 22 that belong to the Southern Hemisphere.When equator Eq matched with the fastest part of circling round, this golf 20 had been realized outstanding indenture effect.This golf 20 has outstanding aerodynamics symmetry.Consider the aerodynamics symmetry, ratio P1 more preferably is equal to or greater than 60%, and further is preferably 100%.In mould 2 as shown in Figure 3, ratio P1 is 100%.
As mentioned above, outstanding 16a is adjacent with outstanding 16b, and they belong to the second-class split of same mould (Lower Half mould 6), and also adjacent with outstanding 16c, and Lower Half mould 6 is different with the second-class split of another mould (first half mould 4) that outstanding 16c belongs to.According to the golf 20 that makes by this mould 2, when the fastest part overlaps with the equator, form the indenture 22 that circles round and belong to " Southern Hemisphere, the Southern Hemisphere, the Northern Hemisphere, the Northern Hemisphere, the Southern Hemisphere, the Southern Hemisphere, the Northern Hemisphere, the Northern Hemisphere, the rest may be inferred " successively.According to the order of such indenture 22 of this pattern, effect is to realize outstanding indenture effect.This golf 20 has outstanding aerodynamics symmetry.
Satisfy and followingly require 2 outstanding 16 quantity and give prominence to ratio P2 between 16 the sum and be preferably and be equal to or greater than 50%.
Require 2: adjacent with the another kind that belongs to the second-class split of same mould that itself belongs to outstanding 16, and adjacent with the another kind more outstanding 16 that belongs to the second-class split of another mould that is different from the second-class split of mould that itself belongs to.
Be equal to or greater than 50% mould 2 prepared golf 20 by ratio P2 wherein and have outstanding aerodynamics symmetry.Aspect this, ratio P2 more preferably is equal to or greater than 60%, and further is preferably 100%.In mould 2 as shown in Figure 1, ratio P2 is 100%.
Ratio Pw between the summation of all width W of outstanding 16 and the total length of equator Eq is equal to or greater than 35%.Be equal to or greater than on the golf 20 that 35% mould 2 makes at usage ratio Pw, outstanding 16 are positioned on the Eq of equator thick and fast.When equator Eq matched with the fastest part of circling round, this golf 20 had been realized outstanding indenture effect.This golf 20 has outstanding aerodynamics symmetry.This golf 20 also has outstanding outward appearance.Consider aerodynamics symmetry and outward appearance, ratio Pw more preferably is equal to or greater than 46%, and further is preferably and is equal to or greater than 59%.The effect on plane 14 is the durability of fiting of stable mode tool and mould 2.Aspect this, ratio Pw is preferably and is equal to or less than 95%, more preferably is equal to or less than 90%, and further is preferably and is equal to or less than 85%.In mould 2 as shown in Figure 2, width W is 3.3mm, and the summation of width W is 79.2mm.Because the total length of equator Eq is 135.1mm in this mould 2, ratio Pw is 58.6%.
Right central angle θ 1 of all cimas on the Eq and θ 2 are for being equal to or less than 20 ° under the line.In use heart angle θ 1 and θ 2 are equal to or less than on the golf 20 that 20 ° mould 2 makes, and outstanding 16 are positioned on the Eq of equator thick and fast.This golf 20 has outstanding aerodynamics symmetry and outward appearance.Aspect this, central angle θ 1 and θ 2 are preferably and are equal to or less than 19 °, and more preferably are equal to or less than 18 °.In order to be easy to mfg. moulding die 2, central angle θ 1 and θ 2 are preferably and are equal to or greater than 10 °, more preferably are equal to or greater than 11 °, and further are preferably and are equal to or greater than 12 °.
By using the different mould 2 of wherein central angle θ 1 and central angle θ 2, can make indenture 22 wherein and be arranged in golf 20 on the Eq of equator with irregular spacing.When equator Eq matched with the fastest part of circling round, this golf 20 had been realized outstanding indenture effect.This golf 20 has outstanding aerodynamics symmetry.Consider the aerodynamics symmetry, the absolute value of difference between central angle θ 1 and the central angle θ 2 (θ 1-θ 2) is preferably and is equal to or greater than 3 °, and more preferably is equal to or greater than 6 °.The absolute value of difference is preferably and is equal to or less than 10 °.Preferred all central angle θ 1 are identical.Equally, preferably all central angle θ 2 are identical.
Satisfy and followingly require 3 outstanding 16 quantity and give prominence to ratio P3 between 16 the sum and be preferably and be equal to or greater than 50%.
Require 3: and the central angle θ 2 that the central angle θ 1 between adjacent outstanding 16 is different from and another is adjacent between outstanding 16.
Be equal to or greater than 50% mould 2 prepared golf 20 by ratio P3 wherein and have outstanding aerodynamics symmetry.Aspect this, ratio P3 more preferably is equal to or greater than 60%, and further is preferably 100%.In mould 2 as shown in Figure 1, ratio P3 is 100%.
Outstanding 16 the quantity that satisfies above-mentioned requirements 2 and 3 simultaneously with give prominence to ratio P4 between 16 the sum and be preferably and be equal to or greater than 50%.Be equal to or greater than 50% mould 2 prepared golf 20 by ratio P4 wherein and have outstanding aerodynamics symmetry.Aspect this, ratio P4 more preferably is equal to or greater than 60%, and further is preferably 100%.In mould 2 as shown in Figure 1, ratio P4 is 100%.
As seen from Figure 6, wherein a large amount of indenture B are run through by the equator Eq of golf 20.Indenture B has bigger diameter.When equator Eq with circle round the fastest part when matching, wherein have the golf 20 that larger-diameter indenture B run through by equator Eq and realized outstanding indenture effect.This golf 20 has outstanding aerodynamics symmetry.Consider the aerodynamics symmetry, the diameter of the cima 10 that is run through by equator Eq is preferably and is equal to or greater than 4.0mm, more preferably is equal to or greater than 4.2mm, and further is preferably and is equal to or greater than 4.4mm.Consider to prevent from indenture 22 significantly to be out of shape that the diameter of the cima 10 that is run through by equator Eq is preferably and is equal to or less than 5.0mm owing to removing burr.The diameter of the cima 10 that is run through by equator Eq is preferably in above-mentioned scope.
Consider the aerodynamics symmetry, all diameters that are positioned at the cima 10 in low latitudes zone are preferably and are equal to or greater than 4.0mm, and more preferably are equal to or greater than 4.1mm.In golf 20 as shown in Figure 6, indenture B, indenture C and indenture D are positioned at the low latitudes zone.The diameter that all of this mould 2 are positioned at the cima 10 in low latitudes zone is equal to or greater than 4.1mm.
The golf 20 that a large amount of indentures 22 are run through by equator Eq has outstanding aerodynamics symmetry.Aspect this, the quantity of the cima 10 that is run through by equator Eq is preferably and is equal to or greater than 18, more preferably is equal to or greater than 20, and further is preferably and is equal to or greater than 24.Because the Eq feasibility of arranging a large amount of indentures 22 under the line, the quantity of the cima 10 that is run through by equator Eq is preferably and is equal to or less than 33, and more preferably is equal to or greater than 30.In mould 2 as shown in Figure 1, the quantity of the cima 10 that is run through by equator Eq is 24.Therefore, in golf 20 as shown in Figure 6, the quantity of the indenture 22 that is run through by equator Eq is 24.
When all diameters of cima 10 that are positioned at the low latitudes zone during with descending, the ratio (Dx1/Dn1) between the average diameter Dx1 of the cima 10 in top 10% and the average diameter Dn1 of the cima in bottom 10% 10 is preferably and is equal to or less than 1.15.When equator Eq matches with the fastest part of circling round, realized outstanding indenture effect by the golf 20 that this mould 2 makes.This golf 20 has outstanding aerodynamics symmetry.Consider the aerodynamics symmetry, ratio (Dx1/Dn1) more preferably is equal to or less than 1.10, and further is preferably and is equal to or less than 1.07.The low latitudes zone of mould 2 as shown in Figure 1 has 36 cima B, 48 cima C and 36 cima D.The quantity that is positioned at the indenture 22 in low latitudes zone is 120.Therefore, 12 cima B are corresponding to the cima in top 10% 10, and 12 cima D are corresponding to the cima in bottom 10% 10.In this mould 2, Dx1 is 4.40mm, and Dn1 is 4.10mm.Therefore, ratio (Dx1/Dn1) is 1.07.
When the diameter of all cimas 10 during with descending, the ratio (Dx2/Dn2) between the average diameter Dx2 of the cima 10 in top 10% and the average diameter Dn2 of the cima in bottom 10% 10 is preferably and is equal to or less than 1.30.Be preferably by this ratio (Dx2/Dn2) and be equal to or less than the golf 20 that 1.30 mould 2 makes and have outstanding flying quality.Consider flying quality, ratio (Dx2/Dn2) more preferably is equal to or less than 1.20, and further is preferably and is equal to or less than 1.16.In mould 2 as shown in Figure 1, ratio (Dx2/Dn2) is 1.16.
All standard deviation ∑s 1 of diameter that are positioned at the cima 10 in low latitudes zone are preferably and are equal to or less than 0.15.When equator Eq matches with the fastest part of circling round, realized outstanding indenture effect by the golf 20 that this mould 2 makes.This golf 20 has outstanding aerodynamics symmetry.Consider the aerodynamics symmetry, standard deviation ∑ 1 more preferably is equal to or less than 0.12.In the low latitudes zone of as shown in Figure 1 mould 2, the average diameter of cima 10 is 4.27mm.Therefore, calculate standard deviation ∑ 1 by following formula:
∑1＝(((4.40—4.27)
2×36+(4.30—4.27)
2×48+(4.10—4.27)
2×36)/120)
1/2
In this golf 20, standard deviation ∑ 1 is 0.12.
The standard deviation ∑ 2 of the diameter of all cimas 10 is preferably and is equal to or less than 0.30.Be preferably by this standard deviation ∑ 2 and be equal to or less than the golf 20 that 0.30 mould 2 makes and have outstanding flying quality.Consider flying quality, standard deviation ∑ 2 more preferably is equal to or less than 0.25, and further is preferably and is equal to or less than 0.20.In mould 2 as shown in Figure 1, standard deviation ∑ 2 is 0.20.
In Fig. 2, by arrow Hp represented be outstanding 16 height to equator Eq.Consider as equator Eq and realize outstanding indenture effect when matching with the fastest part of circling round, height H p is preferably and is equal to or greater than 0.2mm, more preferably is equal to or greater than 0.3mm, and further is preferably and is equal to or greater than 0.4mm.Consider the durability of mould 2, height H p is preferably and is equal to or less than 1.5mm, and more preferably is equal to or less than 1.3mm.
Consider the durability that is easy to make golf 20 and mould 2, (absolute value of Hp1-Hp2) is preferably and is equal to or less than 0.5mm the difference between the highest outstanding 16 height H p1 and minimum outstanding 16 the height H p2.(Hp1-Hp2) is 0 to difference under ideal state.In other words, preferably all outstanding 16 is all identical to the height in equator.
In Fig. 6, what Reference numeral Ln2 and Ls2 were represented is latitude line.The latitude of latitude line Ln2 and Ls2 can be decided to be arbitrarily greater than 20 ° and be equal to or less than in 40 ° the scope.On the surface of golf 20, the zone between latitude line Ln2 and the limit Pn is called as the limit near zone.On the surface of golf 20, the zone between latitude line Ls2 and the limit Ps is also referred to as the limit near zone.As shown in Figure 5, its center style of belonging to the indenture 22 of limit near zone can be separated into 5 unit.The style of each unit is substantially all identical.When the indenture style of a unit when being the center with the limit, can overlap substantially with the style of another unit around 72 ° of rotations.The symmetrical anglec of rotation in the indenture style of limit near zone is 72 °.
The style that belongs to the indenture 22 in low latitudes zone can be separated into 6 unit.The style of each unit is substantially all identical.When the indenture style of a unit when being the center with the limit, can overlap substantially with the style of another unit around 60 ° of rotations.The symmetrical anglec of rotation in the indenture style in low latitudes zone is 60 °.This symmetry anglec of rotation is different with the symmetrical anglec of rotation (just 72 °) in the indenture style of limit near zone.Because the difference of the symmetrical anglec of rotation, this golf 20 has outstanding indenture effect.This golf 20 has outstanding flying quality.
In Fig. 6, the zone of being defined by latitude line Ln1 and latitude line Ln2 is to coordinate the zone.Also regional by the zone that latitude line Ls1 and latitude line Ls2 define for coordinating.The style that belongs to the indenture 22 of coordinating the zone is with respect to the centre line C L line symmetry among schematic diagram Fig. 5.This indenture style does not have any other symmetry axis except centre line C L.In this indenture style, when being the center with the limit around rotation more than 0 ° and less than 360 °, the indenture style can not produce coincidence.In other words, can't be divided into a plurality of unit that can the rotatory symmetry in the indenture style of coordinating the zone.In this case, the quantity in the unit of coordinating the zone must be different from the quantity in the unit of limit near zone, and further must be different from the quantity in the unit in low latitudes zone.
If the limit near zone is crossed contiguous low latitudes zone, line of demarcation because the element number difference, indenture 22 can't dense arrangement near this line of demarcation.In this case, near the line of demarcation, can there be bigger space.Bigger space can suppress the indenture effect.In golf 20 according to the present invention, coordinate the zone between limit near zone and low latitudes zone.Coordinate in the zone at this, indenture 22 can restrictedly not arranged by element number.Like this, can reduce the area in space.Because this coordinates the zone, can realize the high occupation rate of indenture 22.
In this golf 20, the symmetrical anglec of rotation of the style of the indenture 22 that is run through by equator Eq is 60 °.This symmetry anglec of rotation is different with the symmetrical anglec of rotation (just 72 °) of the indenture style of limit near zone.When equator Eq matched with the fastest part of circling round, this golf 20 had been realized outstanding indenture effect.This golf 20 has outstanding aerodynamics symmetry.
In this golf 20, the symmetrical anglec of rotation of the style of the indenture 22 that is run through by equator Eq is 60 °.In addition, in this golf 20, belong to low latitudes zone and the symmetrical anglec of rotation of the style of the indenture 22 that do not run through by equator Eq also is 60 °.Both symmetrical anglecs of rotation are identical.According to this golf 20, can realize the high occupation rate of indenture 22 in the low latitudes zone.When equator Eq matched with the fastest part of circling round, this golf 20 had been realized outstanding indenture effect.This golf 20 has outstanding aerodynamics symmetry.
According to the present invention, the ratio between the surface area of the model spheroid of the summation of the area of all indentures 22 and golf 20 is called as occupation rate.Consider abundant realization indenture effect, occupation rate is preferably and is equal to or greater than 75%, more preferably is equal to or greater than 76%, and further is preferably and is equal to or greater than 77%.Occupation rate is preferably and is equal to or less than 86%, more preferably is equal to or less than 85%, and further is preferably and is equal to or less than 84%.
According to the present invention, term " indenture volume " refers to the volume by the part that surface area surrounded of the plane of the profile that comprises indenture 22 and indenture 22.Consider the jump that suppresses golf 20, the cumulative volume of indenture 22 is preferably and is equal to or greater than 250mm3, more preferably is equal to or greater than 260mm3, and further is preferably and is equal to or greater than 270mm3.Consider the tenesmus that suppresses golf 20, the cumulative volume of indenture 22 is preferably and is equal to or less than 400mm3, more preferably is equal to or less than 390mm3, and further is preferably and is equal to or less than 380mm3.
Consider the jump that suppresses golf 20, the degree of depth of indenture 22 is preferably and is equal to or greater than 0.05mm, more preferably is equal to or greater than 0.08mm, and further is preferably and is equal to or greater than 0.10mm.Consider the tenesmus that suppresses golf 20, the degree of depth of indenture 22 is preferably and is equal to or less than 0.60mm, more preferably is equal to or less than 0.45mm, and further is preferably and is equal to or less than 0.40mm.
The diameter of indenture 22 is preferably more than the 2.00mm and is below the 6.00mm.By setting diameter, can realize outstanding indenture effect for being equal to or greater than 2.00mm.Aspect this, diameter more preferably is equal to or greater than 2.20mm, and further is preferably and is equal to or greater than 2.40mm.By setting diameter for being equal to or less than 6.00mm, basic fundamental characteristics for spherical golf 20 can be maintained.Aspect this, diameter more preferably is equal to or less than 5.80mm, and further is preferably and is equal to or less than 5.60mm.
Consider abundant realization indenture effect, the total quantity of indenture 22 is preferably and is equal to or greater than 250, and more preferably is equal to or greater than 270.Consider that each indenture 22 has the feasibility of enough diameters, the total quantity of indenture 22 is preferably and is equal to or less than 400, and more preferably is equal to or less than 370.
Embodiment
Embodiment 1
Make rubber composition by the polybutadiene (trade name " BR-730 " is available from JSR company) of mediating 100 weight portions, the dizinc acrylate resin of 30 weight portions, the zinc oxide of 6 weight portions, the barium sulfate of 10 weight portions, the diphenyl disulfide of 0.5 weight portion and the dicumyl peroxide of 0.5 weight portion.This rubber composition is inserted the mould with the second-class split of last Lower Half mould that has hemisphere cavum respectively, and heating made the kernel that diameter is 39.7mm in 18 minutes under 170 ℃.On the other hand, with the ionomer resin (trade name " Himilan of 50 weight portions
1605 ", available from Du Pont-MITSUI POLYCHEMICALS Co., Ltd), the another kind of ionomer resin (trade name " Himilan of 50 weight portions
1706 ", available from Du Pont-MITSUIPOLYCHEMICALS Co., Ltd) and 3 parts by weight of titanium oxide mediate and to make resin combination.Form half-shells by this resin combination.Wrap up above-mentioned kernel by two half-shells, and kernel and two half-shells are placed as shown in Figure 1 mould.The specification of the cima of mould is shown in following table 1.Half-shells is pressed in this mould and heats to form thickness is the shell of 1.5mm.On shell, formed a large amount of shapes indenture opposite with the shape of cima.Remove the burr that produce along seam by polishing.To comprise that bi-component liquid curable polyurethane is coated on the shell as the varnish of substrate, and make golf have the weight of diameter and the 45.4g of 42.7mm.The PGA boil down to about 85 of this golf.The indenture style of this golf as shown in Figure 5 and Figure 6.
Make golf with method similar to Example 1, the different moulds of specification shown in following table 1 and 2 that have been to use.
The flying distance test
The golf clubs (trade name " XXIO " is available from Sumitomo Rubber Industries Co., Ltd, shaft hardness: X, loft: 9 °) that will have titanium bar head is installed on the machine that swings available from Golf Lab Co., Ltd.Then, be that 49m/sec, initial angle are that about 11 ° and the rate of circling round are to impact golf under the condition of about 3000rpm in bar head speed.Therefore, measure by the distance of starting point to the ball halt.Under the condition in test, be calm condition substantially.Carry out 20 limits respectively and impact the test that impacts with seam.Shown in the following tabulation 3 of the mean value of flying distance.The rotating shaft that seam impacts is through two limits.The rotating shaft that rotating shaft that limit impacts and seam impact is perpendicular.
Outward appearance
Outward appearance to golf is estimated.Grade based on following standard.
A: outward appearance is better,
B: outward appearance is slightly not good, and
C: outward appearance is not good.
Shown in the following tabulation 3 of result.
Table 1 cima specification
Table 2 cima specification
Table 3 assessment result
Ratio Pw and P1～P4 in the table 3 are as follows.
Pw: the ratio between the summation of all width W of outstanding 16 and the total length of equator Eq.
P1: satisfy following 1 outstanding 16 quantity and the ratio of giving prominence between 16 the sum of requiring.
Require 1: adjacent with the another kind that belongs to the second-class split of another mould that is different from the second-class split of mould that itself belongs to outstanding 16.
P2: satisfy following 2 outstanding 16 quantity and the ratio of giving prominence between 16 the sum of requiring.
Require 2: adjacent with the another kind that belongs to the second-class split of same mould that itself belongs to outstanding 16, and adjacent with the another kind more outstanding 16 that belongs to the second-class split of another mould that is different from the second-class split of mould that itself belongs to.
P3: satisfy following 3 outstanding 16 quantity and the ratio of giving prominence between 16 the sum of requiring.
Require 3: and the central angle θ 1 between adjacent outstanding 16 is different from and adjacent another outstanding 16 between central angle θ 2.
P4: satisfy aforementioned 2 and 3 outstanding 16 quantity and the ratio of all giving prominence between 16 the sum of requiring simultaneously.
As shown in table 3, the golf that uses mould according to the present invention to make has outstanding aerodynamics symmetry.Therefore, clearly illustrated advantage of the present invention by these assessment results.
Use can make the golf with multiple structure according to mould of the present invention.Aforementioned description is at the embodiment that exemplifies, and can carry out multiple modification under the situation that does not deviate from principle of the present invention.
Claims (9)
1. one kind is used for golf ball mold, comprises the second-class split of a pair of mould,
On the concave surface of described mould, has the cima that is used to form indenture in a large number, wherein
The second-class split of each mould all has parting surface, and parting surface has plane, depression that forms along the equator and a plurality of the giving prominence to of being protruded by the equator,
Each is given prominence to and comprises a part of cima,
If it is outstanding adjacent to belong to a kind of outstanding and another kind that belongs to the second-class split of another mould of a second-class split of mould, and a described second-class split of mould is different from the second-class split of described another mould, the ratio P1 that then described a kind of outstanding quantity accounts for all outstanding sum is equal to or greater than 50%, and
Ratio Pw between the summation of the outstanding width of measuring along the equator and the total length in equator is equal to or greater than 35%.
2. mould as claimed in claim 1 is characterized in that, its part is included in the diameter of the described cima in described the giving prominence to for being equal to or greater than 4.0mm.
3. mould as claimed in claim 1 is characterized in that, described outstanding quantity is more than 18 and below 33.
4. mould as claimed in claim 1 is characterized in that, the height in all described equator of described outstanding distance equates.
5. mould as claimed in claim 1 is characterized in that, all are positioned at latitude and are equal to or less than 20 ° the diameter of described cima in zone for being equal to or greater than 4.0mm.
6. mould as claimed in claim 1, it is characterized in that, wherein when all were positioned at latitude and are equal to or less than 20 ° the described cima in zone by the descending of diameter, the ratio Dx/Dn between the average diameter Dn of the average diameter Dx of the described cima in top 10% and the described cima in bottom 10% was for being equal to or less than 1.15.
7. mould as claimed in claim 1 is characterized in that, all are positioned at latitude and are equal to or less than 20 ° the standard deviation of diameter of described cima in zone for being equal to or less than 0.15.
8. mould as claimed in claim 1 is characterized in that, the mutually different multiple described cima of diameter is positioned at the zone that latitude is equal to or less than 20 °.
9. method of making golf may further comprise the steps:
Material is placed mould, described mould comprises the second-class split of a pair of mould, on the concave surface of described mould, has the cima that is used to form indenture in a large number, wherein: the second-class split of each mould all has parting surface, and parting surface has plane, depression that forms along the equator and a plurality of the giving prominence to of being protruded by the equator; Each is given prominence to and comprises a part of cima; If it is outstanding adjacent to belong to a kind of outstanding and another kind that belongs to the second-class split of another mould of a second-class split of mould, and a described second-class split of mould is different from the second-class split of described another mould, and the ratio P1 that then described a kind of outstanding quantity accounts for all outstanding sum is equal to or greater than 50%; And the ratio Pw between the summation of the outstanding width of measuring along the equator and the total length in equator is equal to or greater than 35%, and
By material is flowed, form indenture with shape opposite with described cima shape in described mould.
Applications Claiming Priority (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2007272204A JP5323340B2 (en) | 2007-10-19 | 2007-10-19 | Golf ball mold and golf ball manufacturing method |
| JP2007272347 | 2007-10-19 | ||
| JP2007-272347 | 2007-10-19 | ||
| JP2007272347A JP5373276B2 (en) | 2007-10-19 | 2007-10-19 | Golf ball mold and golf ball manufacturing method |
| JP2007-272204 | 2007-10-19 | ||
| JP2007272204 | 2007-10-19 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201010576001.2A Division CN102126267B (en) | 2007-10-19 | 2008-10-16 | Mold for golf balls |
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| Publication Number | Publication Date |
|---|---|
| CN101412271A CN101412271A (en) | 2009-04-22 |
| CN101412271B true CN101412271B (en) | 2011-03-16 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2008101694283A Expired - Fee Related CN101412271B (en) | 2007-10-19 | 2008-10-16 | Mold for golf balls |
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| CN (1) | CN101412271B (en) |
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| JP5827531B2 (en) * | 2010-09-30 | 2015-12-02 | アクシュネット カンパニーＡｃｕｓｈｎｅｔ Ｃｏｍｐａｎｙ | Golf ball dimple pattern |
| US9504887B2 (en) | 2011-03-09 | 2016-11-29 | Acushnet Company | Multi-material iron type golf club head |
| US8454453B2 (en) | 2011-03-09 | 2013-06-04 | Acushnet Company | Multi-material iron type golf club head |
| US9884231B2 (en) | 2011-03-09 | 2018-02-06 | Acushnet Company | Multi-material iron type golf club head |
| CN102837428B (en) * | 2012-08-01 | 2016-12-21 | 李业清 | A kind of ball for pet playing PVC inner ring is to shuttering and press mold production line |
| KR20190001509A (en) * | 2017-06-26 | 2019-01-04 | 스미토모 고무 고교 가부시키가이샤 | Golf ball |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5874038A (en) * | 1996-11-01 | 1999-02-23 | Bridgestone Sports Co., Ltd. | Injection mold for golf balls and method for preparing golf balls |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7422529B2 (en) * | 2004-03-10 | 2008-09-09 | Acushnet Company | Mold for a golf ball |
| JP4347304B2 (en) * | 2006-01-24 | 2009-10-21 | Ｓｒｉスポーツ株式会社 | Golf ball |
-
2007
- 2007-10-19 JP JP2007272204A patent/JP5323340B2/en active Active
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Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5874038A (en) * | 1996-11-01 | 1999-02-23 | Bridgestone Sports Co., Ltd. | Injection mold for golf balls and method for preparing golf balls |
Also Published As
| Publication number | Publication date |
|---|---|
| JP5323340B2 (en) | 2013-10-23 |
| CN101412271A (en) | 2009-04-22 |
| JP2009095589A (en) | 2009-05-07 |
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