GB2178998A - Fishing rod manufacturing method - Google Patents

Fishing rod manufacturing method Download PDF

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Publication number
GB2178998A
GB2178998A GB08618343A GB8618343A GB2178998A GB 2178998 A GB2178998 A GB 2178998A GB 08618343 A GB08618343 A GB 08618343A GB 8618343 A GB8618343 A GB 8618343A GB 2178998 A GB2178998 A GB 2178998A
Authority
GB
United Kingdom
Prior art keywords
preg
cross
sectionally
tape
fishing rod
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
Application number
GB08618343A
Other versions
GB2178998B (en
GB8618343D0 (en
Inventor
Koi Inoue
Jiro Usuda
Nobuhiro Takada
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.)
Globeride Inc
Original Assignee
Daiwa Seiko Co Ltd
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 Daiwa Seiko Co Ltd filed Critical Daiwa Seiko Co Ltd
Publication of GB8618343D0 publication Critical patent/GB8618343D0/en
Publication of GB2178998A publication Critical patent/GB2178998A/en
Application granted granted Critical
Publication of GB2178998B publication Critical patent/GB2178998B/en
Expired legal-status Critical Current

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Classifications

    • 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
    • B29D99/0046—Producing rods
    • 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
    • B29C70/04—Shaping composites, i.e. plastics material comprising reinforcements, fillers or preformed parts, e.g. inserts comprising reinforcements only, e.g. self-reinforcing plastics
    • B29C70/28—Shaping operations therefor
    • B29C70/54—Component parts, details or accessories; Auxiliary operations, e.g. feeding or storage of prepregs or SMC after impregnation or during ageing
    • B29C70/542—Placing or positioning the reinforcement in a covering or packaging element before or during moulding, e.g. drawing in a sleeve
    • 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
    • B29L2031/06—Rods, e.g. connecting rods, rails, stakes
    • 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
    • B29L2031/70—Agricultural usage or equipment
    • B29L2031/7002—Agricultural usage or equipment for fishing

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Composite Materials (AREA)
  • Fishing Rods (AREA)
  • Moulding By Coating Moulds (AREA)
  • Casting Or Compression Moulding Of Plastics Or The Like (AREA)

Abstract

A method for manufacturing a fishing rod comprises the steps of winding a pre-impregnated layer (2), (pre-preg), around a metal core (1) having a substantially circular cross-section. A tape (3) is then spirally wound around the pre-preg (2). The resultant product is then placed in a mold defined by a pair of mold members (4) together forming a cavity having a non-circular cross section. The product is then pressure molded to the same non-circular cross-section. The molded product is thermally hardened whilst still in the pressure-molded state. Thereafter the tape (3) and the metal core (1) are removed. The tape (3) prevents the pre-preg from contacting the mold (4) and thus no wrinkles occur on the pre-preg. The tape also prevents the occurrence of hollows amongst fibres in the pre-preg. The mould cavity may be elliptical, Figure 2, or polygonal, Figure 5 (not shown). <IMAGE>

Description

SPECIFICATION Fishing rod manufacturing method Field of the invention: This invention relates to a method of manufacturing a hollow fishing rod having a non-circular crosssectional shape, such as an elliptic cross-sectional shape and a polygonal cross-sectional shape.
Description of the prior art: A cross-sectionally hexagonal fishing rod and a cross-sectionally elliptic fishing rod are known, which have an excellent directional stability with respect to a bending force applied thereto. In order to make such a fishing rod of a currently-available fiber-reinforced resin, a pre-preg wound around a cross-sectionally circular metal core is placed in an outer mold having a cross-sectionally non-circular hollow, to then subject the wound pre-preg layer to the pressure-molding in which the pre-preg layer is deformed forcibly in accordance with the shape of the hollow of the outer mold. Therefore, the fibers in the pre-preg layer are moved due to the friction occurring between the pre-preg layer and outer mold during the pressuremolding. This causes wrinkles to occur on the pre-preg layer, and hollows to occur among the fibers.
As a result, recesses and projections occur on the outer surface of a tube obtained through a hardening step, and the strength of the tube decreases. Moreover, since the coefficients of thermal expansion of the outer mold and pre-preg are different, the outer mold contracts when the tube which has been thermally hardened is colled, so that strain occurs in the pre-preg. This causes the tube to be bent.
Summary of the invention: An object of the present invention is to manufacture a cross-sectionally non-circular fishing rod of a fiber-reinforced resin with a high efficiency without causing a decrease in the strength of the product, by using a metal core and an outer mold.
The present invention is directed to a method of manufacturing cross-sectionally non-circular fishing rods using a pre-preg, from which these faults are eliminated. The first characteristics of this method reside in the following. When a pre-preg layer wound around a metal core is pressure-molded forcibly to a cross-sectionally non-circular body by a pair of outer molds, a tape is wound around the pre-preg layer in advance so as to present the outer molds from directly contacting the pre-preg. This prevents the occurrence of wrinkles, recesses and projections on the surface of the pre-preg, i.e. the surface of a fishing rod, and hollows among the reinforcing fibers forming the pre-preg, which constitutute the faults of a fishing rod obtained by a conventional method.Therefore, a decrease in the strength of the resultant fishing rod can be reliably prevented, and a cross-sectionally circular, high-quality fishing rod can be manufactured simply and efficiently.
The second characteristics of the present invention reside in the following. The tape layer between the pre-preg layer and outer molds prevents strain, which is ascribed to the difference between the coefficient of expansion of the pre-preg and that of the outer molds in which the pre-preg is hardened, from occurring in the pre-preg layer. This enables a cross-sectionally non-circular fishing rod having no bent portions to be manufactured.
The gist of the present invention resides in a fishing rod manufacturing method consisting of the steps of covering a pre-preg layer, which is wound around a cross-sectionally circular metal core, with a tape by spirally winding the tape around the outer circumferential surface of the pre-preg layer; placing the resultant product in an outer mold having a crosssectionally non-circular hollow and composed of a pair of opposed members; pressure-molding the same product to a cross-sectionally non-circular body; thermally hardening the cross-sectionally non-circular body while leaving the same in a pressure-molded state; and removing the tape and metal core to obtain a cross-sectionally non-circular tube.
The above and other objects as well as the advantageous features of the invention will become apparent from the following description of the preferred embodiments taken in conjunction with the accompanying drawings.
Brief description of the drawings: Figures 1-3 are sectional views showing the manufacturing steps in the method according to the present invention; and Figures 4-6 are sectional views showing the manufacturing steps in another embodiment of the method according to the present invention.
Description of the preferred embodiments: The details of the present invention will now be described with reference to the drawings which show the embodiments thereof. A pre-preg 2 is wound by a generally-used method around a cross-sectionally circular metal core 1, and a tape 3, such as a polyethylene, polypropylene or cellophane adhesive tape is wound spirally in an overlapping manner around the outer circumferential surface of the prepreg so as to cover the same therewith. The resultant product is placed in a pair of outer molds 4, 4 having a cross-sectionally elliptic hollow therebetween, to apply a pressure gradually thereto and thereby mold the same so that it has a cross-sectionally elliptic outer circumferential surface.The molded product is heated as it is left in the pressure-molded state, to thermally harden the same so that the thermosetting resin with which the pre-preg 2 is impregnated is fluidized and hardened in the pre-preg 2. As a result, the pre-preg 2 is molded unitarily in a hardened state with its outer circumferential surface formed elliptically as shown in Figure 3.
The molded product is then taken out from the outer molds 4, 4, and the metal core 1 is withdrawn therefrom, the tape 3 being peeled off to obtain a hollow, cross-sectionally elliptic fishing rod.
The tape 3 is wound around the pre-preg 2 to such a thickness that does not cause any wrinkles to occur on the pre-preg, and any hollows to occur among the fibers in a woven cloth or a sheet of non-twisted fiber threads, which constitutes the pre-preg 2, while the pre-preg 2 is pressure-molded by the outer molds 4, 4.
The pre-preg 2 consists of the same material as is used for the production of a conventional fishing rod of a fiber-reinforced resin. Namely, it consists of a woven cloth or a sheet of non-twisted fiber threads, which is composed of reinforcing fiber of a high strength, such as glass fiber and carbon fiber, impregnated in a semi-dried state with a thermosetting resin, such as epoxy resin and polyester resin. If the outer molds 4, 4 are heated in advance, the pressure-molding of a pre-preg layer to a non-circular cross section by the outer molds 4, 4 can be done easily and suitably. The thermal hardening treatment employed in the present invention is not different at all from a conventional generally-used treatment.
In an embodiment shown in Figures 4-6, a pre-preg 2 around which a tape 3 is wound is pressure-molded by outer molds 4, 4 which have a cross-sectionally hexagonal hollow, to manufacture a hollow, crosssectionally hexagonal fishing rod.
According to the present invention described above, when a pre-preg wound around a cross-sectionally circular metal core is placed in a pair of outer molds which have a cross-sectionally non-circular, for example, elliptic hollow therebetween, to apply a pressure thereto and thereby deformation-mold the pre-preg forcibly, a tape is wound around the outer circumferential surface thereof so as to prevent the pre-preg from directly contacting the outer molds.
Therefore, wrinkles do not occur on the pre-preg layer, so that the outer surface of the resultant fishing rod has no recesses and projections. Also, no hollows occur among the fibers in the pre-preg, so that the strength of the fishing rod does not decrease. The tape referred to above prevents strain from occurring in the pre-preg even if the pre-preg and outer molds expand and contract differently due to their different coefficients of thermal expansion in the thermal hardening step and the subsequent cooling step.
Accordingly, a hollow, cross-sectionally non-circular fishing rod having no bent portions can be manufactured simply and efficiently.
The present invention is not, of course, limited to the above embodiments; it may be modified in various ways within the scope of the appended claims.

Claims (4)

1. A fishing rod manufacturing method comprising the steps of winding a tape spirally around the outer circumferential surface of a pre-preg, which is wound around a cross-sectionally circular metal core, to thereby cover said pre-preg therewith, placing the resultant product in an outer mold consisting of a pair of mold members and having a cross-sectionally non-circular hollow, pressure-molding said product to form said pre-preg to a cross-sectionally non-circular shape, thermally hardening this molded product while leaving the same in a pressure-molded state, and removing said tape and said metal core to obtain a cross-sectionally non-circular tube.
2. A fishing rod manufacturing method according to Claim 1, wherein the hollow defined by said two mold members is formed to a cross-sectionally elliptic shape.
3. A fishing rod manufacturing method according to Claim 1, wherein the hollow defined by said two mold members is formed to a cross-sectionally polygonal shape.
4. A method of manufacturing a rod substantially as hereinbefore described with reference to the accompanying drawings.
GB08618343A 1985-07-30 1986-07-28 Fishing rod manufacturing method Expired GB2178998B (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60168355A JPS6228231A (en) 1985-07-30 1985-07-30 Manufacture of angling rod

Publications (3)

Publication Number Publication Date
GB8618343D0 GB8618343D0 (en) 1986-09-03
GB2178998A true GB2178998A (en) 1987-02-25
GB2178998B GB2178998B (en) 1989-01-18

Family

ID=15866535

Family Applications (1)

Application Number Title Priority Date Filing Date
GB08618343A Expired GB2178998B (en) 1985-07-30 1986-07-28 Fishing rod manufacturing method

Country Status (2)

Country Link
JP (1) JPS6228231A (en)
GB (1) GB2178998B (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO1990000111A1 (en) * 1988-07-04 1990-01-11 Saab-Scania Aktiebolag Method of producing integral articles
GB2223711A (en) * 1985-02-19 1990-04-18 Sven Erik Malmstrom Moulding fibre reinforced structural members
GB2250412A (en) * 1990-11-19 1992-06-10 Articoli Pesca E Sport S N C F Fishing rods
US5262118A (en) * 1991-03-22 1993-11-16 Yamaha Corporation Method for producing a hollow FRP article
EP1281317A1 (en) * 2001-07-31 2003-02-05 Ymbc Fishing rod with improved profile
US8281513B2 (en) * 2006-07-06 2012-10-09 D-Flex Limited Fishing rod
RU2551735C2 (en) * 2010-05-10 2015-05-27 АЛЬСТОМ Риньюэбл Текнолоджиз Crimping module for impregnated conductor rods of large-sized electrical machines and crimping mechanism equipped with above crimping module
CN112997979A (en) * 2021-02-23 2021-06-22 威海市新会渔具有限责任公司 Light high-strength hollow fishing rod and demolding equipment thereof
US11261349B2 (en) * 2015-07-17 2022-03-01 Tesa Se Method for molding a body in a mold

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2577385B2 (en) * 1987-07-03 1997-01-29 リョービ株式会社 Manufacturing method of laminated tube
JPH03187725A (en) * 1989-12-18 1991-08-15 Yokohama Rubber Co Ltd:The Preparation of fiber-reinforced plastic pipe
JP6353735B2 (en) * 2014-08-08 2018-07-04 三ツ星ベルト株式会社 Method for producing filter molded body

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1230710A (en) * 1968-09-28 1971-05-05

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB1230710A (en) * 1968-09-28 1971-05-05

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2223711A (en) * 1985-02-19 1990-04-18 Sven Erik Malmstrom Moulding fibre reinforced structural members
GB2223711B (en) * 1985-02-19 1991-01-09 Sven Erik Malmstrom A method of manufacturing a elongate structural member.
WO1990000111A1 (en) * 1988-07-04 1990-01-11 Saab-Scania Aktiebolag Method of producing integral articles
GB2250412A (en) * 1990-11-19 1992-06-10 Articoli Pesca E Sport S N C F Fishing rods
GB2250412B (en) * 1990-11-19 1994-06-01 Articoli Pesca E Sport S N C F Fishing rod
US5262118A (en) * 1991-03-22 1993-11-16 Yamaha Corporation Method for producing a hollow FRP article
EP1281317A1 (en) * 2001-07-31 2003-02-05 Ymbc Fishing rod with improved profile
FR2828063A1 (en) * 2001-07-31 2003-02-07 Ymbc IMPROVED PROFILE FISHING ROD
US8281513B2 (en) * 2006-07-06 2012-10-09 D-Flex Limited Fishing rod
RU2551735C2 (en) * 2010-05-10 2015-05-27 АЛЬСТОМ Риньюэбл Текнолоджиз Crimping module for impregnated conductor rods of large-sized electrical machines and crimping mechanism equipped with above crimping module
US11261349B2 (en) * 2015-07-17 2022-03-01 Tesa Se Method for molding a body in a mold
CN112997979A (en) * 2021-02-23 2021-06-22 威海市新会渔具有限责任公司 Light high-strength hollow fishing rod and demolding equipment thereof

Also Published As

Publication number Publication date
GB2178998B (en) 1989-01-18
JPH0374903B2 (en) 1991-11-28
JPS6228231A (en) 1987-02-06
GB8618343D0 (en) 1986-09-03

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Legal Events

Date Code Title Description
PCNP Patent ceased through non-payment of renewal fee

Effective date: 19990728