DE2125758A1 - Polyurethane foam sports ball - with the appearance dimensions weight and properties of a leather ball - Google Patents
Polyurethane foam sports ball - with the appearance dimensions weight and properties of a leather ballInfo
- Publication number
- DE2125758A1 DE2125758A1 DE19712125758 DE2125758A DE2125758A1 DE 2125758 A1 DE2125758 A1 DE 2125758A1 DE 19712125758 DE19712125758 DE 19712125758 DE 2125758 A DE2125758 A DE 2125758A DE 2125758 A1 DE2125758 A1 DE 2125758A1
- Authority
- DE
- Germany
- Prior art keywords
- ball
- inner part
- leather
- polyurethane
- polyurethane foam
- 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.)
- Pending
Links
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
- B29C33/00—Moulds or cores; Details thereof or accessories therefor
- B29C33/12—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels
- B29C33/123—Moulds or cores; Details thereof or accessories therefor with incorporated means for positioning inserts, e.g. labels for centering the inserts
-
- 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
- B29C44/00—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles
- B29C44/02—Shaping by internal pressure generated in the material, e.g. swelling or foaming ; Producing porous or cellular expanded plastics articles for articles of definite length, i.e. discrete articles
- B29C44/12—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements
- B29C44/1266—Incorporating or moulding on preformed parts, e.g. inserts or reinforcements the preformed part being completely encapsulated, e.g. for packaging purposes or as reinforcement
-
- 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
- B29C70/00—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts
- B29C70/68—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts by incorporating or moulding on preformed parts, e.g. inserts or layers, e.g. foam blocks
- B29C70/70—Completely encapsulating inserts
-
- 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
- B29D22/00—Producing hollow articles
- B29D22/04—Spherical articles, e.g. balls
-
- 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
- B29D99/00—Subject matter not provided for in other groups of this subclass
- B29D99/0042—Producing plain balls
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2075/00—Use of PU, i.e. polyureas or polyurethanes or derivatives thereof, as moulding material
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
- B29K2105/00—Condition, form or state of moulded material or of the material to be shaped
- B29K2105/04—Condition, form or state of moulded material or of the material to be shaped cellular or porous
-
- 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
Abstract
Description
Verfahren zur Herstellung eines Sportballes Die Erfindung betrifft ein Verfahren zur Herstellung eines Sportballes aus einem elastisch nachgiebigem Innenteil und einer das Innenteil umgebenden Hülle. Method of making a sports ball The invention relates to a method for making a sports ball from an elastically resilient one Inner part and a shell surrounding the inner part.
Im Sport werden überwiegend tederbälle verwendet, für die von den Sportverbänden ganz bestimmte Eigenschaften vorgeschrieben werden. Der Ball muß je nach Spielart, (Fußball, flandball, Trainingsball, Gymnastikball, Wasserball usw.) ein bestimmtes Gewicht, einen vorgegebenen Durchmesser und eine bestimmte Oberflächenbeschaffenheit aufweisen. In sport, tederballs are mainly used, for those of the Specific properties are prescribed to sports associations. The ball must depending on the type of game (soccer, flandball, training ball, exercise ball, water polo etc.) a certain weight, a given diameter and have a certain surface quality.
Ein Handball beispielsweise besteht aus einer aufpumpbaren Gummiblase und einer die Blase umgebenden Lederhülle. Die lederhülle ist aus einzelnen Lederflecken zu einer gleichmäßig geformten Kugel zusammengenäht.A handball, for example, consists of an inflatable rubber bladder and a leather sheath surrounding the bladder. The leather cover is made from individual patches of leather sewn together to form an evenly shaped ball.
Die Lederflecken sind in ihren Abmessungen und physikalischen Eigenschaften gleichgehalten, damit bei mechanischer Beanspruchung oder durch Feuchtigkeitseinfluß der Ball in jedem Fall rund bleibt. Das Gewicht von einem Handball beträgt ca. 430 bis 450 g, der Ballumfang 56 bis 58 cm. Der Ball kann, ohne daß sich der Umfang über die Normmaße hinaus vergrößert, mit Luftdruck bis zu etwa 1 4 atü gefüllt werden. Da Leder sehr flexibel ist, paßt es sich beim Aufprall des Balles der Oberfläche jeder Unebenheit an. Das unelastische Verhalten dagegen dämpft den Rückprall.The leather patches are different in their dimensions and physical properties kept the same, so in the case of mechanical stress or the influence of moisture the ball remains round in any case. The weight of a handball is approx. 430 up to 450 g, the ball circumference 56 to 58 cm. The ball can move without affecting the circumference enlarged beyond the standard dimensions, can be filled with air pressure of up to about 1 4 atmospheres. Since leather is very flexible, it adapts to the surface when the ball hits it every bump. The inelastic behavior, on the other hand, dampens the rebound.
Die Herstellung eines solchen Balles, der die geforderten Abmessungen und Eigenschaften aufweist, erfordert entsprechende Sorgfalt und Genauigkeit und ist im Hinblick darauf, daß eine Vielzahl von Teilen zusammengefügt werden müssen, entsprechend kostspielig, so daß auch der Preis für einen Qualitätsball entsprechend hoch ist. The manufacture of such a ball of the required dimensions and has properties, requires appropriate care and accuracy and is in view of the fact that a large number of parts have to be joined together, accordingly expensive, so that the price for a quality ball accordingly is high.
Die üblichen Freizeit- und Kinderspielbälle, die aus einer mit Gas gefüllten Kunststoffhülle bestehen, weisen gegenüber den erwähnten Lederbällen erhebliche Nachteile auf, die eine Verwendung als Sportball ausschlieben. Der Eunststoffball kann nur mit einem geringen Innendruck beaufschlagt werden, da sich bei Druckerhöhung der Umfailg proportional vergrößert. Um die Dehnung möglichst gering ZtT halten, muß ein verhältnismäßig harter, unflexibler Werkstoff verwendet werden. Die Ballhülle wird möglichst dünn gehalten, damit ein Aufprall des Balles beim Spielenden keine Verletzungen hervorruft. Bedingt durch die dünne Wandstärke ist der Ball mehr als die Hälfte leichter als ein Federball. Außerdem ist eine Beschädigung an spitzen Gegenständen leicht möglich, wodurch der Ball unbrauchbar wird. Das geringe Gewicht gibt dem Ball zudem schlechte Flugeigenschaften. Der wesentliche Vorteil eines solchen Kunststoffballes besteht darin, daß sein Preis gegenüber dem Lederball nur einen Bruchteil beträgt.The usual recreational and children's play balls that come out of one with gas Filled plastic cover exist, have considerable compared to the leather balls mentioned Disadvantages that preclude its use as a sports ball. The plastic ball can only be subjected to a low internal pressure, as this increases when the pressure increases the Umfailg proportionally enlarged. To keep the stretch as low as possible Hold ZtT, a relatively hard, inflexible material must be used. The ball cover is kept as thin as possible, so that the ball hits the end of the game does not cause injuries. Due to the thin wall thickness, the ball is larger than half lighter than a shuttlecock. There is also damage to the tips Objects easily possible, making the ball unusable. The low weight also gives the ball poor flight characteristics. The main advantage of such Plastic ball consists in the fact that its price compared to the leather ball is only one Fraction is.
Der Erfindung liegt die Aufgabe zugrunde, einen Sportball herzuste11e#, der in seinem Aussehen, seinen Abmessungen, seinem Gewicht und seinen Eigenschaften einem Lederball gleicht, aber bedeutend preiswerter als ein Lederball herstellbar ist. The invention is based on the object of producing a sports ball #, that in its appearance, dimensions, weight and properties resembles a leather ball, but is significantly cheaper to manufacture than a leather ball is.
Die gestellte Aufgabe wird gemäß der Erfindung dadurch gelöst, daß zunächst von einem Federball eine Form erstellt wird, in die das Innenteil mit Abstandsstücken so eingelegt wird, daß sich zwischen Formwandung und Innenteil ein gleichmäßiger Hohlraum bildet, und daß in den Hohlraum anschließend eine definierte Menge flüssiges, aufschäumbares Polyurethan eingefüllt wird. The object set is achieved according to the invention in that First a shape is created from a shuttlecock, in which the inner part with spacers is inserted in such a way that there is a more even surface between the mold wall and the inner part Forms cavity, and that in the cavity then a defined amount of liquid, foamable polyurethane is filled.
Da die Form die Nähte, die Narbung sowie die äußere Form des Balles negativ wiedergibt, weist die Polyurethanhülle später das gleiche Aussehen auf wie ein normaler Lederball. Die Wanddicke, das spezifische Gewicht und die Schaumstruktur der Polyurethanhülle sind bestimmbar, so daß Sportbälle mit den jeweils geforderten Eigenschaften für die verschiedensten Zwecke nach dem erfindungsgemäßen Verfahren hergestellt werden können. Durch das erfindungsgemäße Verfahren ergibt sich ein preisgünstiges Endprodukt. Die Eigenschaften des Balles sind ähnlich oder gleich wie bei einem Lederball, wobei aber die Polyurethanhülle den Vorteil aufweist, daß sie verschleißfester als leder ist und keiner Pflege bedarf. Bin weiterer Vorteil gegenüber dem Federball besteht auch noch darin, daß der Ball bei Feuchtigkeit seine Griffigkeit nicht verliert. Because the shape of the seams, the grain and the outer shape of the ball shows negative, the polyurethane shell later has the same appearance as a normal leather ball. The wall thickness, the specific weight and the foam structure the polyurethane cover can be determined so that sports balls with the required Properties for a wide variety of purposes according to the method according to the invention can be produced. The inventive method results in a inexpensive end product. The properties of the ball are similar or the same as with a leather ball, but the polyurethane cover has the advantage that it is more wear-resistant than leather and does not require any maintenance. I'm another advantage compared to the shuttlecock there is also the fact that the ball is wet when it is wet Does not lose grip.
Die. Erfindung wird nachfolgend anhand von zwei in Fig. 1 und Fig. 2 dargestellten Auaführungabeiapielen näher erläutert.The. The invention is explained below with reference to two in FIG. 1 and FIG. 2 illustrated implementation examples explained in more detail.
In Fig. 1 ist die Form mit dem fertigen Ball im Schnitt dargestellt. Die Form besteht aus den Hälften i und 2, die zuvor nach dem Muster eines Originalballes hergestellt worden sind und vorzugsweise aus Silikon bestehen. In den kugelförmigen Hohlraum 3 der Form ragen gleichmäßig über den Umfang verteilt Distanzstücke 4 hinein, die in den Formhälften befestigt sind und dazu dienen, eine in die Form eingelegte Blase 5 so zu æntrìeren daß zwischen der Blase 5 und der sphärischen Begrenzung des Formenhohlraumes ein Zwischenraum 6 von gleichmäßiger Stärke entsteht. Die Blase 5 kann ein handelsüblicher Kunststoffball sein, der gegebenenfalls ein Rückschlagventil 7 besitzt. Die Blase wird mit einem vorgegebenen Luftdruck in die Form eingelegt. Die miteinander verbundenen Formhälften 1 und 2 werden dann verriegelt, und durch einen Angußkanal 8 wird dann in den Hohlraum 6 eine definierte Menge flüssiges aufsohäumbares Polyurethan eingefüllt. Das elastomer vernetzende Polyurethan bildet nach dem Aushärten die die Blase 5 umgebende Hülle, Gegebenenfalls kann vor dem Ventil 7 der Blase eine ffnung 9 gelassen werden, durch die mittels einer Pumpe der Innendruck variiert werden kann. Der Hohlraum 6 wird vorzugsweise zwischen etwa 0,5 bis 1,5 mm in der Dicke bemessen, jedoch richtet sich die Wanddicke, das apezifische Gewicht und die Schaumatruktur der Polyurethanhülle nach dem jeweiligen Verwendungszweck des Balles und es ist dann eine entsprechende Abstimmung dieser Parameter aufeinander erforderlich. In Fig. 1 the shape with the finished ball is shown in section. The shape consists of halves i and 2, which were previously made according to the pattern of an original ball have been made and are preferably made of silicone. In the spherical Cavity 3 of the mold, spacers 4 evenly distributed over the circumference, protrude into it, which are fastened in the mold halves and serve to insert a Bladder 5 to be inside so that between the bladder 5 and the spherical boundary of the mold cavity, a space 6 of uniform thickness is created. The bladder 5 can be a commercially available plastic ball, which optionally has a check valve 7 owns. The bubble is placed in the mold with a given air pressure. The interconnected mold halves 1 and 2 are then locked, and through a sprue channel 8 is then in the cavity 6 a defined amount of liquid boilable Filled with polyurethane. The elastomer-crosslinking polyurethane forms after curing the envelope surrounding the bladder 5, optionally in front of the valve 7 of the bladder an opening 9 can be left through which the internal pressure is varied by means of a pump can be. The cavity 6 is preferably between about 0.5 to 1.5 mm in the Thickness measured, however, the wall thickness, the specific weight and the Foam structure of the polyurethane cover according to the purpose of the ball and these parameters must then be matched to one another accordingly.
Bei dem Ausführungsbeispiel gemäß Fig, 2, bei dem gleiche Teile ~mit den gleichen Bezugaziffern wie in Fig. 1 be#eichnet sind, wird als elastisch nachgiebiges Innenteil in die Form 1,2 ein aus aufschäumbarem Material vorgefertigter Körper 10 eingelegt. Dieser besteht vorzugsweise aus Polyurethan, das spezifisch leichter ist als das Polyurethan der Hülle 6. Zur Zentrierung können hier in vereinfachender Weise Nadeln 11 oder dergleichen verwendet werden, die durch den Körper 10 hindurch gesteckt und nach dem entformen wieder entfernt werden. In the embodiment according to FIG. 2, in which the same parts ~ with The same reference numerals as in Fig. 1 are denoted as elastically resilient Inner part in the form 1, 2 a body prefabricated from foamable material 10 inserted. This is preferably made of polyurethane, which is specifically lighter is than the polyurethane of the shell 6. For centering can be simplified here Way needles 11 or the like are used, which pass through the body 10 inserted and removed again after demolding.
Claims (5)
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712125758 DE2125758A1 (en) | 1971-05-25 | 1971-05-25 | Polyurethane foam sports ball - with the appearance dimensions weight and properties of a leather ball |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19712125758 DE2125758A1 (en) | 1971-05-25 | 1971-05-25 | Polyurethane foam sports ball - with the appearance dimensions weight and properties of a leather ball |
Publications (1)
Publication Number | Publication Date |
---|---|
DE2125758A1 true DE2125758A1 (en) | 1972-12-07 |
Family
ID=5808798
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DE19712125758 Pending DE2125758A1 (en) | 1971-05-25 | 1971-05-25 | Polyurethane foam sports ball - with the appearance dimensions weight and properties of a leather ball |
Country Status (1)
Country | Link |
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DE (1) | DE2125758A1 (en) |
Cited By (15)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2639749A1 (en) * | 1975-03-06 | 1978-03-16 | Hans Winter | Tennis-type game for all grades of player - has telescopic posts, weighted tapes to mark the court and choice of ball which is of soft elastic material |
DE2918193A1 (en) * | 1979-05-05 | 1980-11-06 | Metzeler Schaum Gmbh | Solid football or handball - with plastic foam core surrounded by elastomer shell |
US4241918A (en) * | 1979-04-12 | 1980-12-30 | Massino Chester F | Lighter and softer recreational balls |
FR2572674A1 (en) * | 1985-04-26 | 1986-05-09 | Tassin Charles | Process for manufacturing hollow bodies by low-pressure injection around a prefabricated bladder |
US4660830A (en) * | 1985-01-24 | 1987-04-28 | Home Of Champions, S.A. | Baseball or softball |
DE4001543A1 (en) * | 1989-03-10 | 1990-09-13 | Spalding & Evenflo | MULTIPURPOSE GOLF BALL AND METHOD FOR THE PRODUCTION THEREOF |
EP0429410A2 (en) * | 1989-11-22 | 1991-05-29 | GALLINO COMPONENTI PLASTICI S.p.A. | A method for the manufacture, by the moulding of plastics material, of a motor-vehicle steering wheel which looks like a steering wheel covered with natural leather |
US5181717A (en) * | 1989-03-03 | 1993-01-26 | Adidas Sarragan France | Inflated sports ball |
US5232217A (en) * | 1991-12-13 | 1993-08-03 | Cota Albert O | Triple-play game |
DE19533720A1 (en) * | 1995-09-12 | 1997-03-13 | Primax Electronics Ltd | Method for mfg. track ball for computer operation |
US7740551B2 (en) | 2004-09-17 | 2010-06-22 | Adidas International Marketing B.V. | Bladder |
US7854815B2 (en) | 2002-11-26 | 2010-12-21 | Adidas International Marketing B.V. | Methods of forming three-dimensional panels for a game ball |
US9694247B2 (en) | 2013-02-15 | 2017-07-04 | Adidas Ag | Ball for a ball sport |
US9849361B2 (en) | 2014-05-14 | 2017-12-26 | Adidas Ag | Sports ball athletic activity monitoring methods and systems |
US10523053B2 (en) | 2014-05-23 | 2019-12-31 | Adidas Ag | Sport ball inductive charging methods and systems |
-
1971
- 1971-05-25 DE DE19712125758 patent/DE2125758A1/en active Pending
Cited By (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2639749A1 (en) * | 1975-03-06 | 1978-03-16 | Hans Winter | Tennis-type game for all grades of player - has telescopic posts, weighted tapes to mark the court and choice of ball which is of soft elastic material |
US4241918A (en) * | 1979-04-12 | 1980-12-30 | Massino Chester F | Lighter and softer recreational balls |
DE2918193A1 (en) * | 1979-05-05 | 1980-11-06 | Metzeler Schaum Gmbh | Solid football or handball - with plastic foam core surrounded by elastomer shell |
US4660830A (en) * | 1985-01-24 | 1987-04-28 | Home Of Champions, S.A. | Baseball or softball |
FR2572674A1 (en) * | 1985-04-26 | 1986-05-09 | Tassin Charles | Process for manufacturing hollow bodies by low-pressure injection around a prefabricated bladder |
US5181717A (en) * | 1989-03-03 | 1993-01-26 | Adidas Sarragan France | Inflated sports ball |
DE4001543A1 (en) * | 1989-03-10 | 1990-09-13 | Spalding & Evenflo | MULTIPURPOSE GOLF BALL AND METHOD FOR THE PRODUCTION THEREOF |
EP0429410A2 (en) * | 1989-11-22 | 1991-05-29 | GALLINO COMPONENTI PLASTICI S.p.A. | A method for the manufacture, by the moulding of plastics material, of a motor-vehicle steering wheel which looks like a steering wheel covered with natural leather |
EP0429410A3 (en) * | 1989-11-22 | 1991-07-17 | Gallino Componenti Plastici S.P.A. | A method for the manufacture, by the moulding of plastics material, of a motor-vehicle steering wheel which looks like a steering wheel covered with natural leather, and a steering wheel produced by the method |
US5232217A (en) * | 1991-12-13 | 1993-08-03 | Cota Albert O | Triple-play game |
DE19533720A1 (en) * | 1995-09-12 | 1997-03-13 | Primax Electronics Ltd | Method for mfg. track ball for computer operation |
DE19533720C2 (en) * | 1995-09-12 | 2001-09-20 | Primax Electronics Ltd | Trackball to control cursor movements |
US8622856B2 (en) | 2002-11-26 | 2014-01-07 | Adidas International Marketing B.V. | Three-dimensional panels for a game ball and related methods |
US7854815B2 (en) | 2002-11-26 | 2010-12-21 | Adidas International Marketing B.V. | Methods of forming three-dimensional panels for a game ball |
US8231487B2 (en) | 2004-09-17 | 2012-07-31 | Adidas International Marketing B.V. | Bladder |
US7740551B2 (en) | 2004-09-17 | 2010-06-22 | Adidas International Marketing B.V. | Bladder |
US9694247B2 (en) | 2013-02-15 | 2017-07-04 | Adidas Ag | Ball for a ball sport |
US9849361B2 (en) | 2014-05-14 | 2017-12-26 | Adidas Ag | Sports ball athletic activity monitoring methods and systems |
US10523053B2 (en) | 2014-05-23 | 2019-12-31 | Adidas Ag | Sport ball inductive charging methods and systems |
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