JP2016526443A - 複数層を有するゴルフボールを製造する方法 - Google Patents
複数層を有するゴルフボールを製造する方法 Download PDFInfo
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
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- B29B11/06—Making preforms by moulding the material
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- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
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- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
- B29C43/02—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles
- B29C43/18—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles incorporating preformed parts or layers, e.g. compression moulding around inserts or for coating articles
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Abstract
Description
ゴルフボールの製造及び材料パラメータ
ゴルフボールの材料組成
Claims (30)
- 複数層を有するゴルフボールを製造する方法において、
熱可塑性アイオノマ材料からコアを射出成形するステップであって、該コアは、共通の球面上に整列した複数の多角形のランド部と、該球面から半径方向内側へ延びている複数の溝とを含む外面を有する、射出成形するステップと、
ゴム材料から形成されている第1の半球状シェルと、これの対極側に位置しゴム材料から形成されている第2の半球状シェルとの間に上記コアを位置決めするステップと、
第1の半球状シェルのゴム材料と第2の半球状シェルのゴム材料が、コアの外面全体と整合した形となるように、第1の半球状シェルと第2の半球状シェルを圧縮成形するステップと、
上記コアを取り囲む単一の中間層を形成するために上記ゴム材料を硬化させるステップと、
射出成形及び圧縮成形のうちの少なくとも一方を用いて上記中間層の周りにカバー層を型成形するステップと、
を含む方法。 - 上記複数の溝は、第1の軸の周りに配置された第1の組の環状の溝と、第2の軸の周りに配置された第2の組の環状の溝と、第3の軸の周りに配置された第3の組の環状の溝と、を含み、
第1の軸、第2の軸及び第3の軸は、相互に直交していることを特徴とする請求項1に記載の方法。 - 第1の中間ゴムブランクと第2の中間のゴムブランクを冷間形成することをさらに含み、
第1の半球状シェルと第2の半球状シェルの各々を形成するために、第1の中間ゴムブランクと第2の中間ブランクの各々の一部を硬化させるステップと、
をさらに含む請求項1又は請求項2に記載の方法。 - 上記第1の中間ゴムブランクと第2の中間ブランクの各々の一部を硬化させるステップは、それぞれの金属球体の周りに第1の中間ゴムブランク及び第2の中間ゴムブランクの各々を圧縮成形することを含む請求項3に記載の方法。
- 上記コアの外面全体に亘って上記コアに中間層を結合するステップをさらに含む請求項1〜4のいずれかに記載の方法。
- 上記ゴム材料は、
ポリブタジエンを含む主ゴムと、
不飽和カルボン酸ないしこれの金属塩と、
有機過酸化物と、
を含むことを特徴とする請求項1〜5のいずれかに記載の方法。 - 射出成形及び圧縮成形のうちの一方を用いて第1の中間層の周りに第2の中間層を型成形するステップをさらに含み、
上記カバー層は第2の中間層を取り囲むことを特徴とする請求項1〜6のいずれかに記載の方法。 - 第2の中間層は、ショアDスケールでの測定で63よりも高くかつ上記カバー層の硬度よりも高い硬度を有することを特徴とする請求項7に記載の方法。
- 第2の中間層と上記カバー層の合計の半径方向の厚さの上限が約2.5mmであることを特徴とする請求項8に記載の方法。
- 各環状の溝は、上記球面から最大で0.15mm〜2.0mmの距離だけ延在していることを特徴とする請求項1〜9のいずれかに記載の方法。
- 各環状の溝は、上記球面から最大で0.15mm〜0.8mmの距離だけ延在していることを特徴とする請求項1〜9のいずれかに記載の方法。
- 各環状の溝は、上記球面から最大で0.15mm〜0.5mmの距離だけ延在していることを特徴とする請求項1〜9のいずれかに記載の方法。
- 各環状の溝は、上記球面から最大で0.15mm〜0.3mmの距離だけ延在していることを特徴とする請求項1〜12のいずれかに記載の方法。
- 各環状の溝は、上記球面からほぼ同じ最大距離で延在していることを特徴とする請求項1〜13のいずれかに記載の方法。
- 上記多角形のランド部の少なくとも80%が四辺形の周辺を有するランド部であることを特徴とする請求項1〜14のいずれかに記載の方法。
- 第1の組、第2の組及び第3の組の環状の溝が協働して、少なくとも8つの三角形セクションを画定し、三角形セクションの各々は、第1の軸、第2の軸及び第3の軸によって画定された八分儀内に配置されていて、
三角形セクションの各々は、三角形、五角形、六角形及び八角形からなる群から選択された周辺形状を有する少なくとも1つのそれぞれの多角形のランド部を含むことを特徴とする請求項15に記載の方法。 - 多角形のランド部の総数が100〜300であることを特徴とする請求項1〜16のいずれかに記載の方法。
- 各溝が曲率半径を有することを特徴とする請求項1〜17のいずれかに記載の方法。
- 上記コアの幾何学的中心と重心とが一致していることを特徴とする請求項1〜18のいずれかに記載の方法。
- 上記球面の球の直径が24mm〜32mmであることを特徴とする請求項1〜19のいずれかに記載の方法。
- 上記中間層の最小の半径方向の厚さが4.0mm〜9.0mmであることを特徴とする請求項20に記載の方法。
- 上記熱可塑性アイオノマ材料の曲げ弾性率の上限が約10,000psiであることを特徴とする請求項1〜21のいずれかに記載の方法。
- 上記カバー層は、ショアDスケールでの測定で上限が約72の硬度を有する熱可塑性材料から型成形されることを特徴とする請求項1〜22のいずれかに記載の方法。
- 上記熱可塑性材料は、上限が約1000psiの曲げ弾性率を有する熱可塑性ポリウレタンであることを特徴とする請求項23に記載の方法。
- 複数層を有するゴルフボールを製造する方法において、
熱可塑性アイオノマ材料からコアを射出成形するステップであって、該コアは、共通の球面上に整列された複数の多角形のランド部と、該球面から半径方向内側へ延びている複数の溝とを含む外面を有する、射出成形するステップと、
ゴム材料から第1の中間層ブランクと第2の中間層ブランクを冷間形成するステップと、
第1の半球状シェルと第2の半球状シェルをそれぞれ形成するために、第1の中間層ブランクと第2の中間層ブランクの各々の一部を硬化させるステップと、
第1の半球状シェルと第2の半球状シェルが協働して上記コアを取り囲むように、第1の半球状シェルと第2の半球状シェルとの間に上記コアを位置決めするステップと、
第1の半球状シェルのゴム材料と第2の半球状シェルのゴム材料がコアの外面全体と整合した形となるように、第1の半球状シェルと第2の半球状シェルを圧縮成形するステップと、
上記コアを取り囲む単一の中間層を形成するように上記ゴム材料を完全に硬化させるステップと、
射出成形及び圧縮成形のうちの少なくとも一方を用いて上記中間層の周りにカバー層を型成形するステップと、
を含む方法。 - 上記複数の溝は、第1の軸の周りに配置された第1の組の環状の溝、第2の軸の周りに配置された第2の組の環状の溝、及び第3の軸の周りに配置された第3の組の環状の溝を含み、
第1の軸、第2の軸、第3の軸は、相互に直交していることを特徴とする請求項25に記載の方法。 - 上記ゴム材料を完全に硬化させるステップは、約200℃よりも高い温度にまで上記ゴム材料を加熱することを含む請求項26に記載の方法。
- 第1の中間ゴムブランクと第2の中間ゴムブランクの各々の一部を硬化させるステップは、それぞれの金属球体の周りに第1の中間ゴムブランクと第2の中間ゴムブランクの各々を圧縮成形することを含む請求項25〜27のいずれかに記載の方法。
- 上記コアの外面全体に亘って上記コアに上記中間層を結合させることをさらに含む請求項25〜28のいずれかに記載の方法。
- 上記ゴム材料は、
ポリブタジエンを含む主ゴムと、
不飽和カルボン酸ないしこれの金属塩と、
有機過酸化物と、
を含むことを特徴とする請求項25〜29のいずれかに記載の方法。
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PCT/US2014/044502 WO2015002819A1 (en) | 2013-07-05 | 2014-06-27 | Method of manufacturing a multi-layer golf ball |
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