GB2270633A - Method of making fibre-reinforced plastics cue having a core. - Google Patents

Method of making fibre-reinforced plastics cue having a core. Download PDF

Info

Publication number
GB2270633A
GB2270633A GB9220035A GB9220035A GB2270633A GB 2270633 A GB2270633 A GB 2270633A GB 9220035 A GB9220035 A GB 9220035A GB 9220035 A GB9220035 A GB 9220035A GB 2270633 A GB2270633 A GB 2270633A
Authority
GB
United Kingdom
Prior art keywords
cue
core
mold cavity
outer shell
shaft
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
GB9220035A
Other versions
GB2270633B (en
GB9220035D0 (en
Inventor
Son-Kung Tsai
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.)
Individual
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
Priority to GB9220035A priority Critical patent/GB2270633B/en
Publication of GB9220035D0 publication Critical patent/GB9220035D0/en
Publication of GB2270633A publication Critical patent/GB2270633A/en
Application granted granted Critical
Publication of GB2270633B publication Critical patent/GB2270633B/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • A—HUMAN NECESSITIES
    • A63—SPORTS; GAMES; AMUSEMENTS
    • A63D—BOWLING GAMES, e.g. SKITTLES, BOCCE OR BOWLS; INSTALLATIONS THEREFOR; BAGATELLE OR SIMILAR GAMES; BILLIARDS
    • A63D15/00—Billiards, e.g. carom billiards or pocket billiards; Billiard tables
    • A63D15/08—Cues
    • 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
    • B29C70/86—Incorporated in coherent impregnated reinforcing layers, e.g. by winding
    • 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
    • B29C33/38—Moulds or cores; Details thereof or accessories therefor characterised by the material or the manufacturing process
    • B29C33/40—Plastics, e.g. foam or rubber
    • 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
    • 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
    • B29K2105/06—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts
    • B29K2105/08—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of continuous length, e.g. cords, rovings, mats, fabrics, strands or yarns
    • B29K2105/10—Cords, strands or rovings, e.g. oriented cords, strands or rovings
    • B29K2105/101—Oriented
    • B29K2105/108—Oriented arranged in parallel planes and crossing at substantial angles
    • 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

Abstract

A method of making a fiber-reinforced plastics cue includes moulding a cue core 40 of plastics foam material in a first molding tool containing component parts 20, 24 of the cue. The cue core is then provided thereon with a laminated outer shell formed from a plurality of long fiber fabric sheets 61, 62, 63 preimpregnated in thermosetting resin. The cue core having thereon the laminated outer shell is then arranged in a second molding tool and the moulding tool is heated under pressure so as to cause the outer shell to take the form of the mould cavity as a result of internal pressure generated by the cue core which foams for the second time. <IMAGE>

Description

METHOD OF MAKING FIBER-REINFORCED PLASTIC CUE HAVING A CORE BACKGROUND OF THE INVENTION The present invention relates to a method of making a cue, and more particularly to a method of making a fiber-reinforced plastic cue having a core.
A British Patent GB2060411 discloses a method of making a cue, which includes a process of wrapping windingly a metal mandrel with a plurality of long fiber fabric sheets preimpregnated in thermosetting resin, so as to form a laminated outer shell on the metal mandrel. Such laminated outer shell is heated under pressure to take the form of a cue. Upon the completion of the curing of the cue, the metal mandrel is removed therefrom to form a hollow portion in the cue, which is then filled with a packing mean of plastic nature to form a core.
Such prior art method as described above is defective in that the shape of the laminated outer shell is dependent on the form of the mandrel.
The mandrel used in the prior art method is a slender and highly bendable rod and is therefore vulnerable to distortion. As a result, the rejection rate of the cues having an outer shell of poor quality is relatively high.
The prior art method described above is further defective in that the removal of the mandrel from the cue so made is a difficult task requiring additional man hours.
SUMMARY OF THE INVENTION It is, therefore, the primary objective of the present invention to provide a method of making a fiber-reinforced plastic cue, which requires less man hours.
It is another objective of the present invention to provide a method of making a fiber-reinforced plastic cue, which reduces the rejection rate of the cue so made.
It is still another objective of the present invention to provide a method of making a fiber-reinforced plastic cue having a core that can be united in advance with the cue body in the process.
In keeping with the principles of the present invention, the foregoing objectives of the present invention are accomplished by an improved method of making a fiber-reinforced plastic cue, which includes a process of forming a cue core of plastic foam material having a first predetermined outer diameter and a longitudinal axis, and which includes a subsequent process of forming a laminated outer shell on the cue core by wrapping windingly around the cue core with a plurality of fiber fabric sheets which are provided with fibers arranged at predetermined orientations and which are preimpregnated in thermosetting resin. The outer shell has a second predetermined diameter which is greater than the first predetermined diameter. The cue core having thereon the laminated outer shell is arranged in a molding tool provided with a mold cavity having a shape of a cue intended to be made.The molding tool is heated under a pressure so that the cue core and the outer shell take the form of the cue.
In the method of the present invention described above, the cue core may be made from a solid plastic foam material or a liquid plastic foam material. If the liquid plastic foam material is used, the other components of the cue should be arranged in the molding tool before the liquid plastic foam material is injected into the molding tool, so as to ensure that the other components of the cue are united with the cue core so made.
BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 shows a perspective view of a cue made by a preferred embodiment of the present invention.
FIG. 2 shows a sectional view of a portion taken along a line 2-2 as shown in FIG. 1.
FIG. 3 shows a perspective schematic view of making a cue core embodied in the present invention.
FIGS. 4 and 5 are sectional views taken axially along the closed molding tool containing therein the cue core embodied in the present invention.
FIG. 6 is a perspective schematic view showing that a laminated outer shell is formed on the cue core embodied in the present invention.
DETAILED DESCRIPTION OF THE PREFERRD EMBODIMENTS Referring to all drawings, a cue 10 embodied in the present invention is shown to comprise a front shaft 12 of a tapered construction and a rear shaft 14, which are joined together by means of a threaded joint 16. The tip of the front shaft 12 is provided with a leather tip 18 for hitting a ball, while the rear end of the rear shaft 14 is provided with a cue butt 20 which is protected by a plastic bumper 22.
The method of making the front shaft 12 is similar to that of making the rear shaft 14. Therefore, the following description of the method refers mainly to the rear shaft 14.
The rear shaft 14 is composed of a laminated outer shell 30 and a cue core 40 enclosed in the laminated outer shell 30.
In the process of making the rear shaft 14, a first molding tool 50 having an upper mold 52 and a lower mold 54 is closed so as to define a mold cavity 56 provided with a shape in agreement with a shape of the rear shaft 14 and with a dimension smaller than a dimension of the rear shaft 14.
The threaded joint 16 has a head 24, which is placed at an end of the mold cavity 56 having a small outer diameter, while the cue butt 20 is arranged at another end of the mold cavity 56 having a large outer diameter. The head 24 of the threaded joint 16 has an outer segment 241 and an inner segment 242.
The inner segment 242 is suspended in the mold cavity 56 by means of a projected ring 243 urging the wall of the mold cavity 56, while the outer segment 241 has a porton that is attached intimately to the wall of the mold cavity 56, as shown clearly in FIG. 4. Similarly, the cue butt 20 has an outer segment 201 and an inner segment 202. The inner segment 202 is suspended in the mold cavity 56 by means of a projected ring 203 urging the wall of the mold cavity 56, while the outer segment 201 is attached intimately to the wall of the mold cavity 56, as shown in FIG. 5.
Upon the closure of the upper and the lower molds 52 and 54, a liquid polyurethane foam material is injected into the mold cavity 56, in which a cue core 40 is formed. The injected polyurethane foam material will diffuse into the peripheries of the inner segments 242 and 202 so that both front and rear ends of the cue core 40 are united securely and respectively with the head 24 and the cue butt 20, in view of the fact that the inner segment 242 of the head 24 and the inner segment 202 of the cue butt 20 are both arranged in the mold cavity 56 in a suspended manner.
Upon the completion of the molding of the cue core 40, the cue core 40 is wrapped orderly and windingly with three carbon fiber fabric sheets, each of which is composed of fibers arranged at angles of +30 and 0 and is preimpregnated in epoxy resin, so as to form thereon a laminated outer shell 30, as shown in FIG. 6.
The cue core 40 having thereon the laminated outer shell 30 is then arranged in another molding tool having a mold cavity with a dimension corresponding to the dimension of the rear shaft 14. This molding tool is subsequently heated to a temperature of 160 degrees in Celsius under a pressure of 70kg/cm#, so as to cause the cue core 40 to foam for the second time in order to force the outer shell 30 to expand to attach intimately to the wall of the mold cavity 56. Upon the completion of the curing process of the outer shell 30, the molding tool is opened to remove therefrom a rear shaft 14.
It should be noted here that a pressurized gas may be introduced into the hollow inner portion of the outer shell 30 so as to ensure that the outer shell 30 is forced to expand to attach intimately to the wall of the mold cavity 56.
Therefore, the advantages of the present invention over the prior art have become apparent and are summarized hereinafter.
The cue core of the present inventin is made from the foam material and is therefore able to serve as a source of an internal pressure. In addition, such cue core is used as a mandrel for forming a laminated outer shell and is allowed to remain as a part of the cue. In the prior art method, the mandrel has to be removed upon the completion of the molding of the cue, and the hollow portion formed as a result of the removal of the mandrel has to be filled with a packing means. The present invention is therefore relatively efficient and economically feasible.
The outer shell of the present invention is molded and cured in accordance with the shape of the mold cavity under the circumstance that there is an internal pressure in the outer shell. As a result, the mandrel of the present invention is not vulnerable to deformation at such time when an external pressure is exerted upon the molding tool containing the mandrel.
In the present invention, the carbon fiber fabric sheets are wrapped on the cue core only after the cue core has been united with other components of the cue. In addition, the cue core is caused to foam for the second time so as to ensure that the cue core is united further securely with the outer shell.
According to the present invention, no additional work is needed to attach other components to the cue shaft upon the completion of the molding of the cue shaft. In the present invention, the components are attached with precision to the cue core prior to the formation of the cue shaft.

Claims (6)

WHAT IS CLAIMED IS:
1. A method of making a fiber-reinforced plastic cue having a core, in which said cue comprises a shaft being circular in its cross section and having an outer diameter which becomes progressively greater from an end of the shaft to another end of the shaft, said shaft comprising a laminated outer shell formed by a plurality of fiber-reinforced plastic fabric sheets, said shaft further comprising a cue core of plastic foam material enclosed by said outer shell; wherein said method is characterized in that said shaft is made according to the following steps: (a) forming a cue core of plastic foam material, with said cue core having a first predetermined outer diameter and a longitudinal axis; (b) forming a laminated outer shell on said cue core by wrapping orderly and windingly said cue core with a plurality of long fiber fabric ' sheets which are composed of fibers arranged at predetermined angles and are preimpregnated in thermosetting resin, said outer shell having a second predetermined outer diameter greater than said first predetermined outer diameter; (c) arranging said cue core having thereon said outer shell in a molding tool having therein a mold cavity with a shape in agreement with a shape of said shaft of said cue; and (d) heating said molding tool under a pressure, so as to cause said outer shell and said cue core to take the shape of said mold cavity.
2. The method of claim 1 wherein said step (a) comprises two substeps as follows: (a1) making use of a first molding tool having a mold cavity with a shape corresponding to a shape of said cue core; and (a2) injecting a liquid plastic foam material into said mold cavity, so as to form a cue core having a shape corresponding to the shape of said mold cavity and having a first outer diameter and a longitudinal axis.
3. The method of claim 2 wherein said cue has a plurality of components, which are prearranged at predetermined locations in said mold cavity before said liquid plastic foam material is injected into said mold cavity.
4. The method of claim 3 wherein each of said components has an inner segment and an outer segment, with said inner segment arranged in said mold cavity in a suspended manner.
5. A method of making a fiber-reinforced plastics cue, substantially as hereinbefore described with reference to the accompanying drawings.
6. A cue made according to the method claimed in any one of the preceding claims.
GB9220035A 1992-09-22 1992-09-22 Method of making fiber-reinforced plastic cue having a core Expired - Fee Related GB2270633B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
GB9220035A GB2270633B (en) 1992-09-22 1992-09-22 Method of making fiber-reinforced plastic cue having a core

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
GB9220035A GB2270633B (en) 1992-09-22 1992-09-22 Method of making fiber-reinforced plastic cue having a core

Publications (3)

Publication Number Publication Date
GB9220035D0 GB9220035D0 (en) 1992-11-04
GB2270633A true GB2270633A (en) 1994-03-23
GB2270633B GB2270633B (en) 1995-08-09

Family

ID=10722321

Family Applications (1)

Application Number Title Priority Date Filing Date
GB9220035A Expired - Fee Related GB2270633B (en) 1992-09-22 1992-09-22 Method of making fiber-reinforced plastic cue having a core

Country Status (1)

Country Link
GB (1) GB2270633B (en)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19620218C1 (en) * 1996-05-20 1997-05-15 Thomas Dr Richter Carbon fibre reinforced stick for Mikado game
US6736733B2 (en) * 1999-01-08 2004-05-18 Kuo-Pin Yu On billiard cue
CN106003755A (en) * 2016-07-06 2016-10-12 上海复合材料科技有限公司 Mold and method for forming carrier rocket low-temperature liquid oxygen storage tank made of all-composite material

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112774176B (en) * 2020-12-30 2022-10-21 广联航空工业股份有限公司 Method for manufacturing billiard cue with automatic stress application and adjustable gravity center point

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2060411A (en) * 1979-10-17 1981-05-07 Cerezo V E Cue
GB2209681A (en) * 1987-09-10 1989-05-24 Kuo Teng Hsien Cues

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB2060411A (en) * 1979-10-17 1981-05-07 Cerezo V E Cue
GB2209681A (en) * 1987-09-10 1989-05-24 Kuo Teng Hsien Cues

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE19620218C1 (en) * 1996-05-20 1997-05-15 Thomas Dr Richter Carbon fibre reinforced stick for Mikado game
US6736733B2 (en) * 1999-01-08 2004-05-18 Kuo-Pin Yu On billiard cue
CN106003755A (en) * 2016-07-06 2016-10-12 上海复合材料科技有限公司 Mold and method for forming carrier rocket low-temperature liquid oxygen storage tank made of all-composite material

Also Published As

Publication number Publication date
GB2270633B (en) 1995-08-09
GB9220035D0 (en) 1992-11-04

Similar Documents

Publication Publication Date Title
US5262118A (en) Method for producing a hollow FRP article
EP0170178B1 (en) Removable core for producing tubular structures from fibre composites
US4294787A (en) Method of producing reinforced composite racket frame
US4709757A (en) Method of injection molding and plastic part formed thereby
US5580416A (en) Mandrel assembly
US4873043A (en) Method injection molded a plastic part with a round tubular portion
US5262113A (en) Method of making a plastic encased tool component having a lightweight hollow core
US20090087599A1 (en) Hollow Composite Article and Method for Making the Same
US6183233B1 (en) Apparatus for manufacturing golf club shafts
GB2270633A (en) Method of making fibre-reinforced plastics cue having a core.
US5198058A (en) Method of making golf club of plastic composite material
US4393024A (en) Method of producing a racket frame
JP2931996B2 (en) Manufacturing method of plastic bottle with handle
US4836964A (en) Method of producing a bow holding handle
JPH04294132A (en) Manufacture of hollow product of fiber reinforced thermoplastic plastic
JPH01110379A (en) Method for manufacturing bat of fiber-reinforced plastics
JPH07108562A (en) Molding of golf club shaft
JP2563236B2 (en) Racket frame manufacturing method
JP3359789B2 (en) Pressure bag for internal pressure molding
JP2020138520A (en) Method for manufacturing tubular member for vehicle body
JPS62198448A (en) Manufacture of tubular member made of composite material
US6468465B1 (en) Plastic injection molding with reduced dimensional variations using gas pressure and secondary plastic injection
JP3359790B2 (en) Pressure bag for internal pressure molding
JP2525744B2 (en) Composite resin molded product, its manufacturing apparatus, and its use
WO1992001546A1 (en) Injection-moulded thermoplastic container and methods for producing the same

Legal Events

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

Effective date: 19970922