EP0077134A1 - Verfahren zur Herstellung eines mit Faserkunststoffschichten verstärkten Schlägers - Google Patents

Verfahren zur Herstellung eines mit Faserkunststoffschichten verstärkten Schlägers Download PDF

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Publication number
EP0077134A1
EP0077134A1 EP82304940A EP82304940A EP0077134A1 EP 0077134 A1 EP0077134 A1 EP 0077134A1 EP 82304940 A EP82304940 A EP 82304940A EP 82304940 A EP82304940 A EP 82304940A EP 0077134 A1 EP0077134 A1 EP 0077134A1
Authority
EP
European Patent Office
Prior art keywords
racket
fiber
resin impregnated
sheets
tailored
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.)
Withdrawn
Application number
EP82304940A
Other languages
English (en)
French (fr)
Inventor
Kun Nan Lo
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
LO, KUN NAN
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of EP0077134A1 publication Critical patent/EP0077134A1/de
Withdrawn legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63B—APPARATUS FOR PHYSICAL TRAINING, GYMNASTICS, SWIMMING, CLIMBING, OR FENCING; BALL GAMES; TRAINING EQUIPMENT
    • A63B49/00—Stringed rackets, e.g. for tennis
    • A63B49/02—Frames
    • A63B49/10—Frames made of non-metallic materials, other than wood

Definitions

  • the present invention is related to composite sheet naterial, particularly a thermoset resin impregnated fiber reinforced plastics skin for a wooden racket.
  • a game racket such as a tennis racket
  • the design and the material from which the frame of the racket is constructed for example, a tennis racket which is constructed with a wooden frame has good torsional stiffness characteristics enabling the player to maintain touch control during strong play, especially when the ball is hit off- center.
  • metal rackets generally have better bending stiffness characteristics than wood rackets, thereby enabling the player to hit the ball with a considerable degree of power and often without feeling the vibrational stress.
  • FIG. 1 A conventional method for manufacturing the fiber reinforced plastics skin is illustrated in Fig. 1; the fiber reinforced plastics skin 10 is formed by press punching a cured fiber sheet according to the outline of the wooden frame. Then, the respective fiber reinforced plastics skin is adhered to the surface of the wooden frame. It is no doubt that some reinforcement might be achieved in this way. Yet inherent effect possessed by the reinforced material is not completely manifested. Further it is not economical to adhere same thickness of the fiber reinforced plastics skin to each portion of the racket frame. Another drawback is that since before tailoring the reinforced fiber sheet has been cured so that the orientation of the fiber has been - fixed and can not be pre-arranged to meet the desired angle. Besides, after press punching, very high percentage of the precured reinforcing fiber sheet will be left unused, hence increasing the production cost.
  • a method for manufacturing a thermoset resin impregnated fiber reinforced plastics skin for a wooden racket comprises steps of: tailoring a first uncured thermoset resin impregnated fiber sheet with the fiber thereof being arranged in cross-ply pattern, each- fiber oriented at an angle ranging from + 25° - + 45 0 with respect to a longitudinal axis of a racket, into the flat shape of respective portion of the racket; tailoring a second uncured thermoset resin impregnated fiber sheets with the fiber thereof being arranged in cross-ply pattern, each- fiber oriented at an angle ranging from 0° + 90° with respect to the longitudinal axis of the racket, to the proper portion of the first fiber sheet; and bending the first tailored fiber sheet with the second tailored fiber sheet. by curing to form a predesigned laminated racket reinforced plastics skin.
  • Another object of the present invention is to provide a method for producing a fiber laminate, in which before tailoring to adapt to the shape of the frame, the resin impregnated.fiber is not yet cured so that the resin impregnated fiber sheet is very easily and economically cut and laminated to the mold.
  • a first uncured thermoset resin impregnated carbon fiber sheet 26 is firstly tailored into a semi-annular shaped layer 23 and a substantially Y-shaped layer 22 which includes a throat portion and a shaft portion corresponding to the respective portion of a wooden racket frame.
  • Each fiber of the semi-annular shaped layer 23 is arranged in cross-ply pattern and the orientation of each fiber is at an angle ranging from ⁇ 25° ⁇ 45 0 , with respect to a longitudinal axis of a racket.
  • the orientation of the - fiber of the Y-shaped layer 22 is identical to that of the semi-annular shaped layer 23 and the fibers of both layers are overlapped at their juncture24. Thereafter, several uncured resin impregnated carbon fiber strips 25 with different length which have their fiber oriented at an angle ranging from 0° - 90°, with respect to the longitudinal axis of the wooden racket, are separately adhered to the necessary part of the surface of the Y-shaped layer 22 and the semi-annular shaped layer 23..
  • each layer is an as yet uncured resin impregnated carbon fiber sheet
  • the number of layers of the laminate can be varied to cater to the need, and the center of gravity of the whole frame-can be adjusted by means of adding additional weight to the Y-shaped layer 22 or to the same annular shaped layer 23.
  • the throat portion which is most commonly subjected to the largest impact, can be reinforced by a further layer of strip-shaped carbon fiber sheet to meet this need.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Materials Engineering (AREA)
  • Health & Medical Sciences (AREA)
  • General Health & Medical Sciences (AREA)
  • Physical Education & Sports Medicine (AREA)
  • Moulding By Coating Moulds (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)
EP82304940A 1981-10-09 1982-09-20 Verfahren zur Herstellung eines mit Faserkunststoffschichten verstärkten Schlägers Withdrawn EP0077134A1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US31000281A 1981-10-09 1981-10-09
US310002 1981-10-09

Publications (1)

Publication Number Publication Date
EP0077134A1 true EP0077134A1 (de) 1983-04-20

Family

ID=23200577

Family Applications (1)

Application Number Title Priority Date Filing Date
EP82304940A Withdrawn EP0077134A1 (de) 1981-10-09 1982-09-20 Verfahren zur Herstellung eines mit Faserkunststoffschichten verstärkten Schlägers

Country Status (1)

Country Link
EP (1) EP0077134A1 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5174568A (en) * 1992-01-08 1992-12-29 You Chin San Racket frame
US6319159B1 (en) * 2000-10-13 2001-11-20 Kuo-Pin Yu Game racket frame with wooden cover layer
US20110136602A1 (en) * 2009-06-18 2011-06-09 Xene Corporation Fiber composite and process of manufacture
ES2564208A1 (es) * 2014-09-18 2016-03-18 Decathlon Raqueta para juego de pelota y método correspondiente

Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB400305A (en) * 1931-05-07 1933-10-26 Laszlo Auer Improved manufacture of tennis and like racket frames
US2878020A (en) * 1949-12-16 1959-03-17 Roy H Robinson Racket for batting games
FR2057942A5 (de) * 1969-08-08 1971-05-21 Pvba Snauwaert Depla
FR2258874A1 (de) * 1974-01-24 1975-08-22 Exxon Research Engineering Co
US4031181A (en) * 1972-04-05 1977-06-21 General Dynamics Corporation Method for molding high strength facing
FR2380038A1 (fr) * 1977-02-09 1978-09-08 Dunlop Ltd Renforcement de cadres d'articles de sport
GB2043460A (en) * 1979-02-22 1980-10-08 Hasegawa Chem Ind Racquet frame
EP0055184A1 (de) * 1980-12-22 1982-06-30 Michel Guyot Rahmen eines Schlägers, insbesondere eines Tennisschlägers, aus mit widerstandsfähigen Fasern verstärktem polymeren Kunststoff und Verfahren zu dessen Herstellung

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB400305A (en) * 1931-05-07 1933-10-26 Laszlo Auer Improved manufacture of tennis and like racket frames
US2878020A (en) * 1949-12-16 1959-03-17 Roy H Robinson Racket for batting games
FR2057942A5 (de) * 1969-08-08 1971-05-21 Pvba Snauwaert Depla
US4031181A (en) * 1972-04-05 1977-06-21 General Dynamics Corporation Method for molding high strength facing
FR2258874A1 (de) * 1974-01-24 1975-08-22 Exxon Research Engineering Co
FR2380038A1 (fr) * 1977-02-09 1978-09-08 Dunlop Ltd Renforcement de cadres d'articles de sport
GB2043460A (en) * 1979-02-22 1980-10-08 Hasegawa Chem Ind Racquet frame
EP0055184A1 (de) * 1980-12-22 1982-06-30 Michel Guyot Rahmen eines Schlägers, insbesondere eines Tennisschlägers, aus mit widerstandsfähigen Fasern verstärktem polymeren Kunststoff und Verfahren zu dessen Herstellung

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5174568A (en) * 1992-01-08 1992-12-29 You Chin San Racket frame
US6319159B1 (en) * 2000-10-13 2001-11-20 Kuo-Pin Yu Game racket frame with wooden cover layer
US20110136602A1 (en) * 2009-06-18 2011-06-09 Xene Corporation Fiber composite and process of manufacture
US8328666B2 (en) * 2009-06-18 2012-12-11 Chien Sheng Hsu Fiber composite and process of manufacture
US10500447B2 (en) 2009-06-18 2019-12-10 Xene Corporation Fiber composite and process of manufacture
ES2564208A1 (es) * 2014-09-18 2016-03-18 Decathlon Raqueta para juego de pelota y método correspondiente

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Legal Events

Date Code Title Description
PUAI Public reference made under article 153(3) epc to a published international application that has entered the european phase

Free format text: ORIGINAL CODE: 0009012

AK Designated contracting states

Designated state(s): AT BE CH DE FR GB IT LI LU NL SE

RAP1 Party data changed (applicant data changed or rights of an application transferred)

Owner name: LO, KUN NAN

17P Request for examination filed

Effective date: 19830907

STAA Information on the status of an ep patent application or granted ep patent

Free format text: STATUS: THE APPLICATION IS DEEMED TO BE WITHDRAWN

18D Application deemed to be withdrawn

Effective date: 19841128