JP2006068339A - ゴルフボール製造方法 - Google Patents
ゴルフボール製造方法 Download PDFInfo
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- JP2006068339A JP2006068339A JP2004256514A JP2004256514A JP2006068339A JP 2006068339 A JP2006068339 A JP 2006068339A JP 2004256514 A JP2004256514 A JP 2004256514A JP 2004256514 A JP2004256514 A JP 2004256514A JP 2006068339 A JP2006068339 A JP 2006068339A
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- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
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- 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
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- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
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- B29C66/73—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7394—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoset
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- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
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- B—PERFORMING OPERATIONS; TRANSPORTING
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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
- B29C69/004—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 making articles by joining parts moulded in separate cavities, said parts being in said separate cavities during said joining
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- 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
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- B29D99/0042—Producing plain balls
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- B29C43/00—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor
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- B29C2043/023—Compression moulding, i.e. applying external pressure to flow the moulding material; Apparatus therefor of articles of definite length, i.e. discrete articles characterised by the shape of the surface having a plurality of grooves
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- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap joints
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Abstract
【解決手段】センターと、熱可塑性樹脂組成物からなるマントル層を備えたコアが用意される。次に、このコアの表面に、熱硬化性樹脂組成物からなる補強層が形成され、球体40が得られる。次に、この球体40が、2枚のハーフシェル46で被覆される。次に、球体40及びハーフシェル46が、成形型32に投入される。次に、成形型32が、0.01mm/sec以上1.0mm/sec以下の速度で締められる。ハーフシェル46の熱可塑性樹脂組成物は、球状キャビティ内で加圧されつつ加熱され、流動する。この熱可塑性樹脂組成物が固化し、厚みが0.1mm以上0.7mm未満であるカバーが得られる。成形温度Tとカバーの熱可塑性樹脂組成物の流動開始温度Fcとの差(T−Fc)は、0℃以上30℃以下である。
【選択図】図3
Description
(1)その外側に熱可塑性樹脂組成物からなるマントル層を備えたコアの表面に、熱硬化性樹脂組成物からなる補強層が形成され、球体が得られる補強層形成工程、
(2)他の熱可塑性樹脂組成物からなり碗状である2枚のハーフシェルと、これらハーフシェルに覆われた上記球体とが、共に半球状のキャビティを有する上型及び下型を備えた成形型に、この成形型が開かれた状態で投入される投入工程、
(3)この成形型が0.01mm/sec以上1.0mm/sec以下の速度で締められることにより、ハーフシェルの熱可塑性樹脂組成物が球状キャビティ内で加圧されつつ加熱され、余剰の熱可塑性樹脂組成物が球状キャビティから流出する型締め工程
及び
(4)ハーフシェルの熱可塑性樹脂組成物が固化して厚みが0.1mm以上0.7mm未満であるカバーが得られる固化工程
を含む。成形温度Tとカバーの熱可塑性樹脂組成物の流動開始温度Fcとの差(T−Fc)は、0℃以上30℃以下である。
球状キャビティ内でハーフシェルの熱可塑性樹脂組成物が型締め工程の圧縮力F1よりも高い圧縮力F2で加圧される高圧工程
を含む。
プランジャー面積:1cm2
DIE LENGTH:1mm
DIE DIA:1mm
荷重:588.399N
開始温度:30℃
昇温速度:3℃/min
[実施例1]
100質量部のポリブタジエン(JSR社の商品名「BR−730」)、37質量部のアクリル酸亜鉛、適量の酸化亜鉛、0.7質量部のビス(ペンタブロモフェニル)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、ゴム組成物を得た。このゴム組成物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、170℃の温度下で15分間加熱して、直径が38.3mmであるセンターを得た。
成形条件を下記表1及び表2に示される通りとした他は実施例1と同様にして、ゴルフボールを得た。
各層の構成を下記表1及び表2に示される通りとした他は実施例1と同様にして、ゴルフボールを得た。実施例4の補強層には、二液硬化型ウレタン樹脂を基材ポリマーとする塗料組成物が用いられた。この塗料組成物の生成では、まず、116質量部のPTMG及び16質量部の1,2,6−ヘキサントリオールを120質量部の溶剤(トルエンとメチルエチルケトンとの混合液)に溶解した。この液に、その濃度が0.1質量%となるように、ジブチル錫ジラウリレートを添加した。この液を80℃に保持しながら、48質量部のイソホロンジイソシアネートを滴下して、ウレタンポリオールを含有する主剤液を得た。このウレタンポリオールの固形分は60質量%であり、水酸基価は87mgKOH/gであり、重量平均分子量は7850であった。この主剤液と、イソホロンジイソシアネート(住友バイエルウレタン社製)を含有する硬化剤液とを、NCO/OHがモル比で1.2となるように混合した。この液に、光安定剤(三共社の商品名「サノールLS770」)、紫外線吸収剤(チバガイギー社の商品名「チヌビン900」)及び蛍光増白剤(チバガイギー社の商品名「ユビテックスOB」)を添加して、塗料組成物を調製した。ウレタン樹脂成分100質量部に対する添加量は、光安定剤が2質量部であり、紫外線吸収剤が2質量部であり、蛍光増白剤が0.2質量部である。
1000個のゴルフボールの外観を、目視で観察した。カバーの内部に空気が残留している箇所が存在するゴルフボールの数と、ベアーが発生しいてる箇所が存在するゴルフボールの数とをカウントし、不良の発生率を算出した。この結果が、下記の表1及び表2に示されている。
ゴルフボールを45m/sの速度で、繰り返し金属板に衝突させ、ゴルフボールが破壊されるまでの回数をカウントした。10個のゴルフボールについての測定の結果が、下記の表1及び表2に示されている。
4・・・コア
6・・・補強層
8・・・カバー
10・・・センター
12・・・マントル層
14・・・ディンプル
18・・・第一成形型
32・・・第二成形型
34・・・上型
36・・・下型
38・・・キャビティ面
40・・・球体
44・・・予備成形体
46・・・ハーフシェル
Claims (6)
- その外側に熱可塑性樹脂組成物からなるマントル層を備えたコアの表面に、熱硬化性樹脂組成物からなる補強層が形成され、球体が得られる補強層形成工程と、
他の熱可塑性樹脂組成物からなり碗状である2枚のハーフシェルと、これらハーフシェルに覆われた上記球体とが、共に半球状のキャビティを有する上型及び下型を備えた成形型に、この成形型が開かれた状態で投入される投入工程と、
この成形型が0.01mm/sec以上1.0mm/sec以下の速度で締められることにより、ハーフシェルの熱可塑性樹脂組成物が球状キャビティ内で加圧されつつ加熱され、余剰の熱可塑性樹脂組成物が球状キャビティから流出する型締め工程と、
このハーフシェルの熱可塑性樹脂組成物が固化して厚みが0.1mm以上0.7mm未満であるカバーが得られる固化工程と
を含んでおり、
成形温度Tとカバーの熱可塑性樹脂組成物の流動開始温度Fcとの差(T−Fc)が0℃以上30℃以下であるゴルフボール製造方法。 - 上記型締め工程における圧縮力F1が130kgf以上1900kgf以下である請求項1に記載の製造方法。
- 上記球状キャビティ内でハーフシェルの熱可塑性樹脂組成物が型締め工程の圧縮力F1よりも高い圧縮力F2で加圧される高圧工程を、型締め工程と固化工程との間に含む請求項1に記載の製造方法。
- 上記型締め工程における圧縮力F1に対する高圧工程における圧縮力F2の比(F2/F1)が1.5以上30.0以下である請求項3に記載の製造方法
- 上記マントル層の熱可塑性樹脂組成物の基材ポリマーがアイオノマー樹脂を主成分としており、カバーの熱可塑性樹脂組成物の基材ポリマーが熱可塑性ポリウレタンエラストマーを主成分としている請求項1から4のいずれかに記載の製造方法。
- 上記マントル層の熱可塑性樹脂組成物の流動開始温度Fmがカバーの熱可塑性樹脂組成物の流動開始温度Fcよりも低い請求項1から5のいずれかに記載の製造方法。
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2007319589A (ja) * | 2006-06-05 | 2007-12-13 | Sri Sports Ltd | ゴルフボール |
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CN107185198B (zh) * | 2017-05-31 | 2019-06-21 | 句容晨阳体育用品有限公司 | 一种羽毛球球头的制备工艺 |
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