JPS63214270A - Production of ball for ball game - Google Patents
Production of ball for ball gameInfo
- Publication number
- JPS63214270A JPS63214270A JP4968387A JP4968387A JPS63214270A JP S63214270 A JPS63214270 A JP S63214270A JP 4968387 A JP4968387 A JP 4968387A JP 4968387 A JP4968387 A JP 4968387A JP S63214270 A JPS63214270 A JP S63214270A
- Authority
- JP
- Japan
- Prior art keywords
- ball
- parison
- layer
- molds
- manufacturing
- 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
- 238000004519 manufacturing process Methods 0.000 title claims description 18
- 239000010410 layer Substances 0.000 claims description 42
- 238000000034 method Methods 0.000 claims description 17
- 229920001971 elastomer Polymers 0.000 claims description 16
- 230000003014 reinforcing effect Effects 0.000 claims description 14
- 229920002725 thermoplastic elastomer Polymers 0.000 claims description 14
- 239000012790 adhesive layer Substances 0.000 claims description 5
- 239000004744 fabric Substances 0.000 claims description 5
- 239000005038 ethylene vinyl acetate Substances 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 claims description 2
- 229920001200 poly(ethylene-vinyl acetate) Polymers 0.000 claims description 2
- 229920000728 polyester Polymers 0.000 claims description 2
- 238000003825 pressing Methods 0.000 claims description 2
- 239000002356 single layer Substances 0.000 claims description 2
- PPBRXRYQALVLMV-UHFFFAOYSA-N Styrene Chemical compound C=CC1=CC=CC=C1 PPBRXRYQALVLMV-UHFFFAOYSA-N 0.000 claims 2
- 239000004433 Thermoplastic polyurethane Substances 0.000 claims 2
- 239000000806 elastomer Substances 0.000 claims 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 claims 2
- 238000009958 sewing Methods 0.000 claims 1
- 238000004804 winding Methods 0.000 claims 1
- 239000010985 leather Substances 0.000 description 9
- 238000002347 injection Methods 0.000 description 8
- 239000007924 injection Substances 0.000 description 8
- 239000000853 adhesive Substances 0.000 description 6
- 230000001070 adhesive effect Effects 0.000 description 6
- 210000003491 skin Anatomy 0.000 description 6
- 210000002615 epidermis Anatomy 0.000 description 3
- 239000004677 Nylon Substances 0.000 description 2
- 238000000576 coating method Methods 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 229920001778 nylon Polymers 0.000 description 2
- 229920002635 polyurethane Polymers 0.000 description 2
- 239000004814 polyurethane Substances 0.000 description 2
- 230000002787 reinforcement Effects 0.000 description 2
- 238000007788 roughening Methods 0.000 description 2
- 229920006465 Styrenic thermoplastic elastomer Polymers 0.000 description 1
- 238000004040 coloring Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000002788 crimping Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 210000004709 eyebrow Anatomy 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 239000002649 leather substitute Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 238000001175 rotational moulding Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000002759 woven fabric Substances 0.000 description 1
Classifications
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/24—Lining or labelling
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/20—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor of articles having inserts or reinforcements ; Handling of inserts or reinforcements
-
- 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
- B29C49/00—Blow-moulding, i.e. blowing a preform or parison to a desired shape within a mould; Apparatus therefor
- B29C49/02—Combined blow-moulding and manufacture of the preform or the parison
- B29C49/04—Extrusion blow-moulding
-
- 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
- Engineering & Computer Science (AREA)
- Manufacturing & Machinery (AREA)
- Mechanical Engineering (AREA)
- Moulds For Moulding Plastics Or The Like (AREA)
- Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、ゴムチューブに糸巻補強層を形成し、その外
周に多層の熱可塑性エラストマーよりなる外張眉を形成
してなる球技用ボールの製造方法に関する。[Detailed Description of the Invention] <Industrial Application Field> The present invention relates to a ball game ball which is formed by forming a thread-wound reinforcing layer on a rubber tube, and forming an outer eyebrow made of a multilayer thermoplastic elastomer on the outer periphery of the reinforcing layer. Regarding the manufacturing method.
〈従来の技術〉
ゴムチューブ、糸巻補強層、中貼ゴム層及び皮革表皮層
を有する球技用ボール、例えばパレーボ一ル、サッカー
ボール、バスケノＩ□ボール等は、第７図に示す工程を
経て作製される。即ちまずシート状ゴムを球形中空体よ
りなるデユープに成形し、これを約１７０℃に加熱して
加硫し、その後チユーブ表面に数千ｍ分のナイロン糸等
を無限軌道上に巻いて補強層を形成する。この補強層は
、ボールに真球性、耐久性及び寸法安定性を付与するも
のである。次いでこの補強層を被覆して中貼層と呼ばれ
るゴム薄層を形成し、この表面に接着剤（ゴム糊）を塗
布した後、複数枚の皮革パネル（天然皮革或いは合成皮
革パネル）を接着して完成する。<Prior art> Balls for ball games, such as parley balls, soccer balls, basketball balls, etc., having a rubber tube, a thread-wound reinforcing layer, a middle rubber layer, and a leather skin layer are manufactured through the steps shown in FIG. be done. That is, first, a sheet-like rubber is formed into a dupe made of a hollow spherical body, and this is heated to about 170°C to vulcanize it, and then several thousand meters of nylon thread or the like is wound on a continuous track around the tube surface to form a reinforcing layer. form. This reinforcing layer provides the ball with sphericity, durability, and dimensional stability. Next, this reinforcing layer is covered with a thin rubber layer called the middle layer, and after applying an adhesive (rubber paste) to this surface, multiple leather panels (natural leather or synthetic leather panels) are glued together. and complete it.
〈発明が解決しようとする問題点〉
上記製造方法にあっては、補強層を形成した後、中貼成
形工程、接着剤塗布工程及び皮革パネル接着工程がそれ
ぞれ必要であり、これらは人手による手間のかかる作業
であった。特に皮革パネルの接着作業は、例えば５角・
６角パターンを有するサンカーボールの場合１２枚の５
角形皮革パネルと２０枚の６角形皮革パネルを裏面に接
着剤を塗布した状態で半球彫金型内面に隙間な（配列さ
せ、これに接着剤を塗布したボール基体を収容、圧縮し
てボール基体表面に３２枚の上記皮革パネルを接着する
のである。かかる作業は、手作業によるものであり、パ
ネルの位置ずれ等不良が発生し易く、作業時間、作業の
正確さは作業者の能力によって大きく左右されるという
問題があった。<Problems to be Solved by the Invention> In the above manufacturing method, after forming the reinforcing layer, an inner patch forming process, an adhesive coating process, and a leather panel bonding process are required, and these steps require manual labor. It was a time-consuming task. Especially when bonding leather panels, for example,
In the case of a sunker ball with a hexagonal pattern, there are 12 fives.
A rectangular leather panel and 20 hexagonal leather panels with adhesive applied to their backs are arranged in a gap on the inner surface of a hemispherical carving mold, and the ball base coated with adhesive is accommodated and compressed to form the surface of the ball base. The 32 leather panels mentioned above are glued together.This work is done by hand, and defects such as panel misalignment are likely to occur, and work time and work accuracy greatly depend on the ability of the worker. There was a problem with being exposed.
本発明は、このような問題を解決するためになされたも
ので、上記後半の３工程を従来と異なる新規な方法に換
え、作業性の改善、作業時間の短縮化、作業の自動化を
図ったものである。The present invention was made to solve these problems, and it replaces the latter three steps with a new method that is different from the conventional method, improving work efficiency, shortening work time, and automating work. It is something.
〈問題点を解決するための手段〉
本発明に係る球技用ボールの製造方法は、耐摩耗性及び
耐候性を有する熱可塑性エラストマーを含むパリソンを
、押出ダイより押出す工程、対向する半球中空部分を有
する２個の金型の該半球中空部分に、補強性を付与され
るとともに、一定圧の空気が封入されて球形に保持され
た中空球形のボール基体を配置し、該ボール基体を内包
する如く上記パリソンを上記金型間に導入する工程、上
記２個の金型を重ね合わせて上記ボール基体表面に上記
パリソンを圧接させると同時に上記金型表面に形成した
複数個の吸引孔より上記パリソンと上記金型間に存在す
る空気を吸引する工程、上記２個の金型を分離し球形に
成形された中空ボールを取り出す工程よりなり、上記ボ
ール基体の表面をもって上記パリソンを球形に伸延する
ことにより該パリソンの球面方向の流動を抑制し、該パ
リソンの肉厚を均一化するものである。<Means for Solving the Problems> The method for manufacturing a ball game ball according to the present invention includes a step of extruding a parison containing a thermoplastic elastomer having wear resistance and weather resistance through an extrusion die, and a step of extruding a parison containing a thermoplastic elastomer having wear resistance and weather resistance, and a step of extruding a parison containing a thermoplastic elastomer having wear resistance and weather resistance. A hollow spherical ball base, which is provided with reinforcing properties and is held in a spherical shape by being filled with air at a constant pressure, is placed in the hemispherical hollow portions of the two molds, and the ball base is enclosed therein. The step of introducing the parison between the molds as shown in FIG. and the step of sucking the air existing between the two molds, and the step of separating the two molds and taking out the hollow ball formed into a spherical shape, and stretching the parison into a spherical shape using the surface of the ball base. This suppresses the flow of the parison in the spherical direction and makes the thickness of the parison uniform.
〈実 施 例〉
以下実施例を、３層パリソンを押し出し成形し、これを
ボール基体表面に球形に被覆して外張層を形成する場合
につき説明する。<Example> An example will be described below in which a three-layer parison is extruded and coated in a spherical shape on the surface of a ball base to form an outer layer.
第１図において、１は共押出ダイで３個の注入孔２ａ、
２ｂ、２ｃを有しており、これらの注入孔２ａ、２ｂ、
２ｃには、各々図示しない押出・・・より熱可塑性樹脂
が供給される。３はマンドレルで、共押出ダイ１との間
に微少間隙が形成されており、注入孔２ａ、２ｂ、２ｃ
より注入された樹脂は、３層パリソン４として、図中下
方へ押出さく６）
れる。注入孔２ａには、耐摩耗性及び耐候性を有するス
チレン系熱可塑性エラストマー例えばツルプレン（登録
商標、旭化成工業株式会社製）が供給されパリソン４の
最内Ｎ５が形成される。注入孔２ｂには、エチレン酢酸
ビニル共重合体けん化物が供給され接着剤Ｎ６が形成さ
れる。さらに注入孔２Ｃには、耐摩耗性、耐候性を有し
かつ光沢の良好な熱可塑性エラストマー、例えばポリウ
レタン系熱可塑性エラストマーであるタケランク（登録
商標、武田薬品工業株式会社製）が供給され、パリラフ
４０表皮層７が形成される。ここで最内層５の厚さは、
約１．５鰭ないし２．０態、接着剤層６の厚さは約２０
μ、表皮層７の厚さは約１０μである。接着剤層６は、
最内Ｎ５と表皮層７を接着させるためのものである。ま
たパリソン４の内径は、ボールの直径に対応して決定さ
れ、サッカーポールの場合、約２２ｃｍが適当である。In FIG. 1, 1 is a coextrusion die with three injection holes 2a,
2b, 2c, and these injection holes 2a, 2b,
Thermoplastic resin is supplied to 2c by an extruder (not shown). 3 is a mandrel, which has a minute gap formed between it and the coextrusion die 1, and has injection holes 2a, 2b, 2c.
The injected resin is extruded downward in the figure as a three-layer parison 4 (6). A styrenic thermoplastic elastomer having wear resistance and weather resistance, such as Turuprene (registered trademark, manufactured by Asahi Kasei Industries, Ltd.), is supplied to the injection hole 2a to form the innermost N5 of the parison 4. A saponified ethylene-vinyl acetate copolymer is supplied to the injection hole 2b to form the adhesive N6. Further, the injection hole 2C is supplied with a thermoplastic elastomer having wear resistance, weather resistance, and good gloss, such as Takerank (registered trademark, manufactured by Takeda Pharmaceutical Company Limited), which is a polyurethane thermoplastic elastomer. 40 epidermal layer 7 is formed. Here, the thickness of the innermost layer 5 is
Approximately 1.5 fins to 2.0 fins, thickness of adhesive layer 6 is approximately 20
μ, the thickness of the skin layer 7 is approximately 10 μ. The adhesive layer 6 is
This is for adhering the innermost layer N5 and the skin layer 7. Further, the inner diameter of the parison 4 is determined in accordance with the diameter of the ball, and in the case of a soccer pole, approximately 22 cm is appropriate.
８ａ。8a.
８ｂは、パリソン４の導出部下方にパリソン４の直径よ
り僅か大きい間隔を有して分離された金型で、各々対向
する面に半球形キャビティ９ａ、９ｂが形成されている
。１０．１０は、キャビティ９ａ、９ｂ端縁に形成され
た刃、１１．１１・・・は、キャビティ９ａ、９ｂ表面
に多数形成された微少な孔で、空気を吸引するためのも
のである。１２は真空ポンプに連結されるパイプである
。キャビティ９ａ、９ｂ内面には、ボール表面の模様を
反転させた形状の凹凸パターン（図示せず）が形成され
ており、例えばサッカーボールの場合、５角・６角パタ
ーンの境界線が突条に形成されている。8b is a mold that is separated from the parison 4 at a distance slightly larger than the diameter of the parison 4 below the lead-out part thereof, and has hemispherical cavities 9a and 9b formed on opposing surfaces thereof. 10.10 is a blade formed on the edge of the cavities 9a, 9b, and 11.11... is a large number of minute holes formed on the surface of the cavities 9a, 9b for sucking air. 12 is a pipe connected to a vacuum pump. The inner surfaces of the cavities 9a and 9b are formed with a concavo-convex pattern (not shown) that is an inversion of the pattern on the surface of the ball. For example, in the case of a soccer ball, the boundaries of the pentagonal and hexagonal patterns are formed into protrusions. It is formed.
１３は、中空球形のゴムチューブ１８及び糸巻による補
強層１４からなるボール基体で、支持具１５にて支持さ
れている。この支持具１５は、ボール基体１３の空気注
入用バルブ１６ （第２図）に差し込まれる。補強Ｊｉ
ｔ１４は、前述した如く数千ｍ分のナイロン糸を巻いた
もので、凹凸の抵抗表面を形成している。Reference numeral 13 denotes a ball base consisting of a hollow spherical rubber tube 18 and a reinforcing layer 14 made of a thread wound, and is supported by a support 15. This support 15 is inserted into an air injection valve 16 (FIG. 2) of the ball base 13. Reinforcement Ji
As described above, t14 is made of several thousand meters of nylon thread wound, forming an uneven resistance surface.
第２図ないし第６図は、本考案に係る製造方法を工程順
に示すもので以下図に従って説明する。2 to 6 show the manufacturing method according to the present invention in the order of steps, and will be explained below according to the figures.
イ、金型８ａ、８ｂは開いた状態であり、上方から３層
のパリソン４が下降しく矢印ａ）、下方から支持具１５
にて支持されたボール基体１３が、金型５ａ、８ｂの中
間に上昇配置せしめられる（矢ＥＩ］ｂ）。このボール
基体１３は、パリソン４内に包み込まれる（第２図）。A) The molds 8a and 8b are in an open state, and the three-layer parison 4 is descending from above with the arrow a), and the support 15 is coming from below.
The ball base 13 supported by the molds 5a and 8b is raised and placed between the molds 5a and 8b (arrow EI]b). This ball base 13 is wrapped within the parison 4 (FIG. 2).
口、パリソン４の下降は停止し、金型８ａ、８ｂが、重
なり合う方向に各々移動する（矢印Ｃ）。The mouth and parison 4 stop descending, and the molds 8a and 8b move in the direction of overlapping each other (arrow C).
金型８ａ、８ｂの刃がパリソン４の外側表面に接触し、
パリソン４は、内側に押圧され、パリソン４の内側表面
は、ボール基体１３に接触し、ボール基体１３の球面に
沿って変形し始める（第３図）。The blades of the molds 8a and 8b contact the outer surface of the parison 4,
The parison 4 is pressed inward, and the inner surface of the parison 4 contacts the ball base 13 and begins to deform along the spherical surface of the ball base 13 (FIG. 3).
ハ、金型８ａ、８ｂ間隔は、さらに狭くなりパリソン４
は、ボール基体１３表面のかなりの領域に密着する。パ
リソン４は、Ａ点において最も大きく延びようとするが
、補強層１４の抵抗表面のためにその球面方向への延伸
は抑制される。パリソン４が、キャビティ９ａ、９ｂを
完全に寒くと同時に或いはその前から、真空ポンプが駆
動せしめられ、キャビティ９ａ、９ｂ内の空気ば、孔１
１゜１１・・・を介して外部へ放出される。この吸引は
、パリソン４を引張るほど強いものであってはならない
。ボール基体１３には、予め圧搾空気が封入されており
、その球形は保持されているから、パリソン４から力が
加わっても変形しない（第４図）。C. The distance between the molds 8a and 8b is further narrowed and the parison 4
is in close contact with a considerable area of the surface of the ball base 13. The parison 4 tries to extend to the greatest extent at point A, but the resistance surface of the reinforcing layer 14 suppresses its extension in the spherical direction. At the same time or before the parison 4 completely cools down the cavities 9a and 9b, the vacuum pump is activated to cool the air inside the cavities 9a and 9b and the holes 1.
It is released to the outside via 1°11... This suction must not be so strong as to pull the parison 4. The ball base 13 is filled with compressed air in advance and maintains its spherical shape, so it does not deform even when force is applied from the parison 4 (FIG. 4).
二、金型８ａ、８ｂが圧着し終わると、パリソン４は刃
１０．１０にて切断され、ボール外部Ｎ１７が形成され
る。このとき同時に型締力（約５ ｋｇ／ ｃＪ ）に
より、熱可塑性エラストマー同士接着する。この圧着工
程時、支持具１５より更に高圧の空気をチューブ１８内
に吹き込み、外部層１７を補強層１４に食い込ませる如
く接着し、その接着強度を向上させると同時に外部層１
７表面へのパターンの形成を確実に行う（第５図）。2. After the molds 8a and 8b are crimped, the parison 4 is cut by the blade 10.10 to form the ball exterior N17. At the same time, the thermoplastic elastomers are bonded together by mold clamping force (approximately 5 kg/cJ). During this crimping process, higher pressure air is blown into the tube 18 from the support 15 to bond the outer layer 17 so as to bite into the reinforcing layer 14, thereby improving the bonding strength and simultaneously increasing the bonding strength of the outer layer 17.
7. Ensure that the pattern is formed on the surface (Fig. 5).
ホ、冷却後、金型８ａ、８ｂを開き、支持具１５をボー
ル１９とともに下降させる（第６図）。然る後、支持具
１５をボール１９から引き抜き、虫ゴムを装着し、空気
を注入するとボールが完成する。E. After cooling, the molds 8a and 8b are opened and the support 15 is lowered together with the ball 19 (FIG. 6). After that, the support 15 is pulled out from the ball 19, a rubber band is attached, and air is injected to complete the ball.
上記製造方法において、パターンの一部、例えばサンカ
ーボールの場合、５角形パターンの部分に黒色の熱可塑
性エラストマーシートを配置しておき、上記パリソン４
の表皮Ｎ７の色を白色としておけば、作製されたボール
は、黒色の５角形パターンを有することとなる。またこ
の着色は、文字等についても同様に行うことができる。In the above manufacturing method, a black thermoplastic elastomer sheet is arranged in a part of the pattern, for example, in the case of a sunker ball, a pentagonal pattern part, and the parison 4
If the color of the skin N7 is white, the manufactured ball will have a black pentagonal pattern. Further, this coloring can be applied to characters and the like in the same manner.
上記実施例においては、外部Ｎ１７として最内層５、接
着剤層６及び表皮Ｎ７を構成すべく３層パリソン４を使
用した例につき説明したが、これに代えて表皮層７の単
一層のみとすることも可能である。この場合、表皮Ｎ７
の材料としては耐摩耗性及び耐候性に優れた前述のポリ
ウレタン系熱可塑性エラストマー、例えばタケランク（
登録商標）が好適である。In the above embodiment, an example was explained in which the three-layer parison 4 was used to constitute the innermost layer 5, the adhesive layer 6, and the skin N7 as the outer layer N17, but instead of this, only the single layer of the skin layer 7 is used. It is also possible. In this case, epidermis N7
As the material, the aforementioned polyurethane thermoplastic elastomer with excellent wear resistance and weather resistance, such as Takerank (
(registered trademark) is suitable.
また上記実施例においては、ボール基体１３の補強層１
４を糸巻層とした例につき説明したが、これに代えて短
冊状の織布片をゴムチューブに貼着し若しくは球形に縫
合して布層として、これにてゴムチューブを包む構成と
することもでき、この場合、布の織目により、抵抗表面
が形成される。Further, in the above embodiment, the reinforcing layer 1 of the ball base 13
Although the example in which 4 is a thread-wound layer has been described, instead of this, a structure may be adopted in which a strip-shaped piece of woven fabric is attached to a rubber tube or sewn into a spherical shape to form a cloth layer, and the rubber tube is wrapped with this cloth layer. It can also be used, in which case the weave of the fabric forms a resistive surface.
更にボール基体１３としては、ポリエステル系熱可塑性
エラストマー例えばハイトレル（登録商標）又はグリラ
ックス（登録商標）を回転成形法又は射出成形法により
中空球体のチューブに形成し、その表面を粗面処理して
抵抗表面とすることができる。この粗面処理は、金型表
面を粗面にしておくことにより容易に実現できる。Further, as the ball base 13, a polyester thermoplastic elastomer such as Hytrel (registered trademark) or Glilux (registered trademark) is formed into a hollow spherical tube by rotational molding or injection molding, and the surface of the tube is roughened. It can be a resistive surface. This surface roughening can be easily achieved by roughening the surface of the mold.
〈発明の効果〉
本発明に係る球技用ボールの製造方法は、共押出ダイよ
り押出されるパリソンを、半球形キャビティを有する２
個の金型間に導入し、これを圧着、型締することにより
ボール基体に外部層を形成するものであるから、従来の
製造方法において必要であった中貼成形工程、接着剤塗
布工程、革貼成形工程を一工程に置き換えることが可能
となり、かつその作業を自動化することができる。これ
により作業時間の短縮化、不良発生の著しい低下を実現
することができる。<Effects of the Invention> The method for manufacturing a ball for ball games according to the present invention is characterized in that a parison extruded from a coextrusion die is
Since the outer layer is formed on the ball base by introducing it between two molds, pressing and clamping it, the inner layer forming process and adhesive coating process that were necessary in the conventional manufacturing method, It becomes possible to replace the leather pasting and forming process with a single process, and the work can be automated. This makes it possible to shorten working time and significantly reduce the occurrence of defects.
本発明によれば、パリソンは抵抗表面として作用するボ
ール基体上に押圧されるから、このパリソンがボール球
面方向へ流動することは最小限に押さえられ、全体とし
て均一な外部層を得ることができる。According to the invention, since the parison is pressed onto the ball base which acts as a resistive surface, the flow of the parison in the direction of the ball's spherical surface is minimized and an overall uniform outer layer can be obtained. .
第１図は、本発明実施例に係る製造方法を説明するため
の断面図、第２図ないし第６図は、同側を工程順に説明
するための断面図、第７図は、従来の製造方法を示すブ
ロック図である。
１・・・共押出ダイ ２ａ、２ｂ、２ｃ・・・注入
孔３・・・マンドレル ４・・・パリソン５・・・
最内層 ６・・・接着剤層７・・・表皮Ｎ
８ａ、８ｂ・・・金型９ａ、９ｂ・・・キャビ
ティ
１０・・・刃 １１．１１・・・・・・孔１
３・・・ボール基体 １４・・・補強層１５・・・支
持具FIG. 1 is a cross-sectional view for explaining the manufacturing method according to the embodiment of the present invention, FIGS. 2 to 6 are cross-sectional views for explaining the same side in the order of steps, and FIG. 7 is a conventional manufacturing method. FIG. 2 is a block diagram illustrating the method. 1... Coextrusion die 2a, 2b, 2c... Injection hole 3... Mandrel 4... Parison 5...
Innermost layer 6... Adhesive layer 7... Epidermis N
8a, 8b... Mold 9a, 9b... Cavity 10... Blade 11.11... Hole 1
3...Ball base 14...Reinforcement layer 15...Support
Claims (8)
ーを含むパリソンを、押出ダイより押出す工程、対向す
る半球中空部分を有する２個の金型の該半球中空部分に
、補強性を付与されるとともに、一定圧の空気が封入さ
れて球形に保持された中空球形のボール基体を配置し、
該ボール基体を内包する如く上記パリソンを上記金型間
に導入する工程、上記２個の金型を重ね合わせて上記ボ
ール基体表面に上記パリソンを圧接させると同時に上記
金型表面に形成した複数個の吸引孔より上記パリソンと
上記金型間に存在する空気を吸引する工程、上記２個の
金型を分離し球形に成形された中空ボールを取り出す工
程よりなり、上記ボール基体の表面をもって上記パリソ
ンを球形に伸延することにより該パリソンの球面方向の
流動を抑制し、該パリソンの肉厚を均一化することを特
徴とする球技用ボールの製造方法(1) A process of extruding a parison containing a thermoplastic elastomer having wear resistance and weather resistance from an extrusion die, and reinforcing properties are imparted to the hemispherical hollow portions of two molds having opposing hemispherical hollow portions. At the same time, a hollow spherical ball base filled with air at a constant pressure and held in a spherical shape is arranged.
a step of introducing the parison between the molds so as to enclose the ball base; overlapping the two molds and pressing the parison against the surface of the ball base; simultaneously forming a plurality of parisons on the surface of the mold; A step of suctioning the air existing between the parison and the mold through the suction hole of the parison, a step of separating the two molds and taking out a hollow ball molded into a spherical shape, and holding the surface of the ball base to the parison. A method for producing a ball for a ball game, characterized in that by stretching the parison into a spherical shape, the flow of the parison in the spherical direction is suppressed, and the thickness of the parison is made uniform.
チレン系熱可塑性エラストマーよりなる最内層と、エチ
レン酢酸ビニル共重合体けん化物よりなる接着剤層と、
耐摩耗性及び耐候性を有するポリウレタン系熱可塑性エ
ラストマーよりなる表皮層にて構成される３層パリソン
であることを特徴とする特許請求の範囲第１項記載の球
技用ボールの製造方法(2) The parison has an innermost layer made of a styrene thermoplastic elastomer having wear resistance and weather resistance, and an adhesive layer made of a saponified ethylene vinyl acetate copolymer.
The method for producing a ball game ball according to claim 1, wherein the ball is a three-layer parison composed of a skin layer made of a thermoplastic polyurethane elastomer having wear resistance and weather resistance.
リウレン系熱可塑性エラストマーよりなる単一層パリソ
ンであることを特徴とする特許請求の範囲第１項記載の
球技用ボールの製造方法(3) The method for manufacturing a ball game ball according to claim 1, wherein the parison is a single-layer parison made of a thermoplastic polyurethane elastomer having wear resistance and weather resistance.
を有することを特徴とする特許請求の範囲第１項記載の
球技用ボールの製造方法(4) The method for manufacturing a ball for a ball game according to claim 1, wherein the ball base has a resistance surface consisting of a large number of concavities and convexities.
外側表面にて糸を無限軌道上に巻回してなる糸巻層から
なることを特徴とする特許請求の範囲第４項記載の球技
用ボールの製造方法(5) Manufacture of a ball game ball according to claim 4, wherein the ball base is composed of a rubber tube and a wound layer formed by winding a thread on an endless track on the outer surface of the rubber tube. Method
ブ外側表面に短冊状の織布片を複数枚貼着し又は球形に
縫合して形成した布層からなることを特徴とする特許請
求の範囲第４項記載の球技用ボールの製造方法(6) The above-mentioned ball base is comprised of a rubber tube and a cloth layer formed by attaching a plurality of strip-shaped woven cloth pieces to the outer surface of the rubber tube or sewing them into a spherical shape. Method for manufacturing a ball game ball according to item 4
性を有する熱可塑性エラストマーよりなる中空球体より
なることを特徴とする特許請求の範囲第４項記載の球技
用ボールの製造方法(7) The method for manufacturing a ball game ball according to claim 4, wherein the ball base is a hollow sphere made of a reinforcing thermoplastic elastomer whose outer surface has been roughened.
トマーよりなることを特徴とする特許請求の範囲第７項
記載の球技用ボールの製造方法(8) The method for manufacturing a ball game ball according to claim 7, wherein the hollow sphere is made of a polyester thermoplastic elastomer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62049683A JPH0693932B2 (en) | 1987-03-03 | 1987-03-03 | Method for manufacturing ball for ball game |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62049683A JPH0693932B2 (en) | 1987-03-03 | 1987-03-03 | Method for manufacturing ball for ball game |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63214270A true JPS63214270A (en) | 1988-09-06 |
| JPH0693932B2 JPH0693932B2 (en) | 1994-11-24 |
Family
ID=12837978
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62049683A Expired - Fee Related JPH0693932B2 (en) | 1987-03-03 | 1987-03-03 | Method for manufacturing ball for ball game |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0693932B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854249A (en) * | 2016-05-30 | 2016-08-17 | 李福龙 | Hollow ball body and manufacturing method as well as movable ball adopting hollow ball body |
| CN114179273A (en) * | 2021-12-10 | 2022-03-15 | 浙江曙光体育用品有限公司 | Seamless table tennis ball and manufacturing process thereof |
| LU102848B1 (en) * | 2021-07-23 | 2023-01-23 | Plastic Omnium Advanced Innovation & Res | Component for motor vehicle tank |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5073968A (en) * | 1973-10-31 | 1975-06-18 |
-
1987
- 1987-03-03 JP JP62049683A patent/JPH0693932B2/en not_active Expired - Fee Related
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5073968A (en) * | 1973-10-31 | 1975-06-18 |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105854249A (en) * | 2016-05-30 | 2016-08-17 | 李福龙 | Hollow ball body and manufacturing method as well as movable ball adopting hollow ball body |
| LU102848B1 (en) * | 2021-07-23 | 2023-01-23 | Plastic Omnium Advanced Innovation & Res | Component for motor vehicle tank |
| WO2023002051A1 (en) * | 2021-07-23 | 2023-01-26 | Plastic Omnium Advanced Innovation And Research | Component for motor vehicle tank |
| CN114179273A (en) * | 2021-12-10 | 2022-03-15 | 浙江曙光体育用品有限公司 | Seamless table tennis ball and manufacturing process thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0693932B2 (en) | 1994-11-24 |
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