JP6958285B2 - ゴルフボール - Google Patents
ゴルフボール Download PDFInfo
- Publication number
- JP6958285B2 JP6958285B2 JP2017225523A JP2017225523A JP6958285B2 JP 6958285 B2 JP6958285 B2 JP 6958285B2 JP 2017225523 A JP2017225523 A JP 2017225523A JP 2017225523 A JP2017225523 A JP 2017225523A JP 6958285 B2 JP6958285 B2 JP 6958285B2
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- Prior art keywords
- golf ball
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- Prior art date
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- FHKPLLOSJHHKNU-INIZCTEOSA-N [(3S)-3-[8-(1-ethyl-5-methylpyrazol-4-yl)-9-methylpurin-6-yl]oxypyrrolidin-1-yl]-(oxan-4-yl)methanone Chemical compound C(C)N1N=CC(=C1C)C=1N(C2=NC=NC(=C2N=1)O[C@@H]1CN(CC1)C(=O)C1CCOCC1)C FHKPLLOSJHHKNU-INIZCTEOSA-N 0.000 description 2
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- ZNTWBKFKQSOEPV-UHFFFAOYSA-N 1,2,4,5-tetrachloro-3-[(2,3,5,6-tetrachlorophenyl)disulfanyl]benzene Chemical compound ClC1=CC(Cl)=C(Cl)C(SSC=2C(=C(Cl)C=C(Cl)C=2Cl)Cl)=C1Cl ZNTWBKFKQSOEPV-UHFFFAOYSA-N 0.000 description 1
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- JMQANWHMOHXBEA-UHFFFAOYSA-N 1,3-dichloro-5-[(3,5-dichlorophenyl)disulfanyl]benzene Chemical compound ClC1=CC(Cl)=CC(SSC=2C=C(Cl)C=C(Cl)C=2)=C1 JMQANWHMOHXBEA-UHFFFAOYSA-N 0.000 description 1
- RSZIPSKIWRSQAU-UHFFFAOYSA-N 1,4-dibromo-2-[(2,5-dibromophenyl)disulfanyl]benzene Chemical compound BrC1=CC=C(Br)C(SSC=2C(=CC=C(Br)C=2)Br)=C1 RSZIPSKIWRSQAU-UHFFFAOYSA-N 0.000 description 1
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- VZQVHIINDXJOQK-UHFFFAOYSA-N 1-bromo-4-[(4-bromophenyl)disulfanyl]benzene Chemical compound C1=CC(Br)=CC=C1SSC1=CC=C(Br)C=C1 VZQVHIINDXJOQK-UHFFFAOYSA-N 0.000 description 1
- OLOYVIPZMIIGOH-UHFFFAOYSA-N 1-chloro-3-[(3-chlorophenyl)disulfanyl]benzene Chemical compound ClC1=CC=CC(SSC=2C=C(Cl)C=CC=2)=C1 OLOYVIPZMIIGOH-UHFFFAOYSA-N 0.000 description 1
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- FSHJPCSWTKDHNU-UHFFFAOYSA-N 1-chloronaphthalene-2-thiol Chemical compound C1=CC=CC2=C(Cl)C(S)=CC=C21 FSHJPCSWTKDHNU-UHFFFAOYSA-N 0.000 description 1
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- 125000003178 carboxy group Chemical group [H]OC(*)=O 0.000 description 1
- 150000001732 carboxylic acid derivatives Chemical class 0.000 description 1
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- 238000013461 design Methods 0.000 description 1
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- ZLNQQNXFFQJAID-UHFFFAOYSA-L magnesium carbonate Chemical compound [Mg+2].[O-]C([O-])=O ZLNQQNXFFQJAID-UHFFFAOYSA-L 0.000 description 1
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- DZBOAIYHPIPCBP-UHFFFAOYSA-L magnesium;2-methylprop-2-enoate Chemical compound [Mg+2].CC(=C)C([O-])=O.CC(=C)C([O-])=O DZBOAIYHPIPCBP-UHFFFAOYSA-L 0.000 description 1
- AXZKOIWUVFPNLO-UHFFFAOYSA-N magnesium;oxygen(2-) Chemical compound [O-2].[Mg+2] AXZKOIWUVFPNLO-UHFFFAOYSA-N 0.000 description 1
- DWLAVVBOGOXHNH-UHFFFAOYSA-L magnesium;prop-2-enoate Chemical compound [Mg+2].[O-]C(=O)C=C.[O-]C(=O)C=C DWLAVVBOGOXHNH-UHFFFAOYSA-L 0.000 description 1
- 229920003052 natural elastomer Polymers 0.000 description 1
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Description
複数のサポートピンを有し、かつ複数のピンプルを含むキャビティ面を有するモールドに、コアが投入される工程、
上記コアが、上記サポートピンによって上記モールドのキャビティに保持される工程、
上記キャビティ面と上記コアとの間のスペースに、溶融樹脂組成物が注入される工程、
及び
上記樹脂組成物が凝固してカバーが形成され、かつピンプルの形状が反転した形状を有する複数のディンプルが形成される工程
を有する。この製造方法で得られたゴルフボールでは、カバーの体積V(mm3)とコアの圧縮変形量S(mm)との比(V/S)は、1000以上1900以下である。カバーのショアD硬度は、62以下である。ディンプルの総容積Wは、490mm3以上620mm3以下である。サポートピンの緯度α(degree)と、サポートピンの総断面積P(mm2)との比(α/P)は、0.35以上0.60以下である。
V= Vb − Vc − W
この数式において、Vbはゴルフボール2の仮想球の体積を表し、Vcはコア4の体積を表し、Wはディンプル8の総容積を表す。仮想球の意味は、後に詳説される。ディンプル8の総容積の意味は、後に詳説される。
Ar = (Dm / 2)2・ π
100質量部のハイシスポリブタジエン(JSR社の商品名「BR−730」)、25.4質量部のアクリル酸亜鉛、5質量部の酸化亜鉛、適量の硫酸バリウム、0.5質量部のジフェニルジスルフィド及び0.9質量部のジクミルパーオキサイドを混練し、ゴム組成物bを得た。このゴム組成物bを共に半球状キャビティを備えた上型及び下型からなる金型に投入し、160℃で20分間加熱して、直径が40.5mmであるコアを得た。
コア、カバー及びディンプルの仕様を下記の表4−6に示される通りとした他は実施例1と同様にして、実施例2−8及び比較例1−7のゴルフボールを得た。コアの組成の詳細が、下記の表1に示されている。カバーの組成の詳細が、下記の表2に示されている。ディンプルの仕様の詳細が、下記の表3に示されている。
ゴルフボールを45m/sの速度で金属板に繰り返し衝突させ、破損が生じるまでの衝突回数をカウントした。この結果が、指数として、下記の表4−6に示されている。
30名のゴルフプレーヤーにドライバーにてゴルフボールを打撃させ、打球感を聞き取った。「打球感が良好」と答えたゴルフプレーヤーの数に基づき、下記の格付けを行った。
A:25人以上
B:20人以上24人以下
C:15人以上19人以下
D:14人以下
この結果が、下記の表4−6に示されている。
射出成形されたゴルフボールの、一方のポール近傍のカバー厚み及び他方のポール近傍のカバー厚みを測定し、両者の差を算出した。この差が、公称カバー厚み(設計値)の20%以上である場合、当該ゴルフボールを偏芯ありと判定した。120個のゴルフボールのうち偏芯ありと判定されたゴルフボールの数に基づき、下記の格付けを行った。
A:0個
B:1個
C:2個
D:3個以上
この結果が、下記の表4−6に示されている。
30名のゴルフプレーヤーにゴルフボールを目視で観察させ、外観の印象を聞き取った。「外観が気にならない」と答えたゴルフプレーヤーの数に基づき、下記の格付けを行った。
A:25人以上
B:20人以上24人以下
C:15人以上19人以下
D:14人以下
この結果が、下記の表4−6に示されている。
ゴルフラボラトリー社のスイングマシンに、ドライバー(ダンロップスポーツ社の商品名「XXIO」、シャフト硬度:R、ロフト角:10.5°)を装着した。ヘッド速度が40m/secである条件でゴルフボールを打撃して、飛距離を測定した。飛距離は、打撃地点とゴルフボールが静止した地点との距離である。12回の測定で得られた値の平均値が、指数として下記の表4−6に示されている。
4・・・コア
6・・・カバー
8・・・ディンプル
10・・・ランド
12・・・仮想球
14・・・成形型
16・・・上型
18・・・下型
20・・・キャビティ面
22・・・ゲート
24・・・ピン孔
26・・・サポートピン
28・・・第一ピンプル
30・・・第二ピンプル
Eq・・・赤道
P・・・ポール
PL・・・パーティングライン
Claims (6)
- コアと、このコアの外側であってかつマーク層及びペイント層を除いて最も外側に位置しておりサポートピンを有するモールド内で射出成形法によって形成されたカバーとを備えており、
上記カバーの体積V(mm3)と上記コアの圧縮変形量S(mm)との比(V/S)が、1000以上1900以下であり、
上記カバーのショアD硬度が62以下であり、
その表面に複数のディンプルを有しており、
上記ディンプルの総容積Wが490mm3以上620mm3以下であり、
上記サポートピンの緯度α(degree)と、上記サポートピンの総断面積P(mm2)との比(α/P)が、0.35以上0.60以下であるゴルフボール。 - 上記圧縮変形量Sが3.5mm以上である請求項1に記載のゴルフボール。
- 上記サポートピンの数が、8以上12以下である請求項1又は2に記載のゴルフボール。
- 上記ディンプルの数が300個以上400個以下である請求項1から3のいずれかに記載のゴルフボール。
- ツーピース構造を有する請求項1から4のいずれかに記載のゴルフボール。
- 複数のサポートピンを有し、かつ複数のピンプルを含むキャビティ面を有するモールドに、コアが投入される工程、
上記コアが、上記サポートピンによって上記モールドのキャビティに保持される工程、
上記キャビティ面と上記コアとの間のスペースに、溶融樹脂組成物が注入される工程、
及び
上記樹脂組成物が凝固してカバーが形成され、かつピンプルの形状が反転した形状を有する複数のディンプルが形成される工程
を有するゴルフボールの製造方法であって、
上記カバーの体積V(mm3)と上記コアの圧縮変形量S(mm)との比(V/S)が、1000以上1900以下であり、
上記カバーのショアD硬度が62以下であり、
上記ディンプルの総容積Wが490mm3以上620mm3以下であり、
上記サポートピンの緯度α(degree)と、上記サポートピンの総断面積P(mm2)との比(α/P)が、0.35以上0.60以下である製造方法。
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JP4062434B2 (ja) * | 2002-11-29 | 2008-03-19 | ブリヂストンスポーツ株式会社 | ツーピースソリッドゴルフボール |
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US7077764B2 (en) * | 2004-04-14 | 2006-07-18 | Bridgestone Sports Co., Ltd. | Golf ball |
JP2006014939A (ja) * | 2004-07-01 | 2006-01-19 | Sumitomo Rubber Ind Ltd | ゴルフボール用成形型及びゴルフボール製造方法 |
JP2009213712A (ja) * | 2008-03-11 | 2009-09-24 | Bridgestone Sports Co Ltd | 球技用ボールの製造方法及び球技用ボール |
US8021249B2 (en) * | 2009-05-21 | 2011-09-20 | Bridgestone Sports Co., Ltd. | Two-piece solid golf ball |
US9744735B2 (en) * | 2013-06-13 | 2017-08-29 | Bridgestone Sports Co., Ltd. | Method for forming golf ball and mold therefor |
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