EP2464499A1 - A method to cure roving with resin on a liner - Google Patents

A method to cure roving with resin on a liner

Info

Publication number
EP2464499A1
EP2464499A1 EP10749923A EP10749923A EP2464499A1 EP 2464499 A1 EP2464499 A1 EP 2464499A1 EP 10749923 A EP10749923 A EP 10749923A EP 10749923 A EP10749923 A EP 10749923A EP 2464499 A1 EP2464499 A1 EP 2464499A1
Authority
EP
European Patent Office
Prior art keywords
liner
roving
winding
light
resin
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Withdrawn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
EP10749923A
Other languages
German (de)
French (fr)
Inventor
Peter Beck
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
Publication of EP2464499A1 publication Critical patent/EP2464499A1/en
Withdrawn legal-status Critical Current

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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/56—Winding and joining, e.g. winding spirally
    • B29C53/58—Winding and joining, e.g. winding spirally helically
    • B29C53/60—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels
    • B29C53/62—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels rotatable about the winding axis
    • 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
    • B29C35/00—Heating, cooling or curing, e.g. crosslinking or vulcanising; Apparatus therefor
    • B29C35/02—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould
    • B29C35/08—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation
    • B29C35/0805—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation
    • B29C2035/0827—Heating or curing, e.g. crosslinking or vulcanizing during moulding, e.g. in a mould by wave energy or particle radiation using electromagnetic radiation using UV radiation
    • 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
    • B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
    • B29C53/80—Component parts, details or accessories; Auxiliary operations
    • B29C53/8008—Component parts, details or accessories; Auxiliary operations specially adapted for winding and joining
    • B29C53/8066—Impregnating
    • 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
    • B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
    • B29C63/24—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using threads
    • 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
    • B29L2031/712—Containers; Packaging elements or accessories, Packages
    • B29L2031/7154—Barrels, drums, tuns, vats
    • B29L2031/7156—Pressure vessels

Definitions

  • the present invention relates to a method to cure roving with resin on a liner.
  • Composite cylinder manufacturing is a very well developed technology with the highest technical and safety standards. Independent which kind of fibres and resins are used there is always the need of a curing oven, dependence on the pot life of the resin bath and the accuracy of mixing the resin with the hardener. On the other side there is the need to manufacture the composite cylinders faster at a very competitive price with minimum profit margin, energy saving and a repeatable constant resin and hardener mixture.
  • the roving In today's winding process the roving is introduced to the resin bath, which is most of the time a double wall bath to keep the resin and hardener mixture cold in order to increase the pot life.
  • the pot life is in most cases around 30 minutes and only during this time a constant amount of the resin mixture is sticking at the roving. To refill or to change to a new resin bath with new resin mixture is time consuming.
  • a method to cure roving with resin on a liner at high production speed with light and light conductive flexible length winding shaft and winding shaft equipped with light source from inside the liner with the light beams evenly distributed on to the roving already wedded by the resin during winding process includes the steps of (a) wedding the roving before the wedded roving is placed by the winding program on the liner using a light curing resin in a resin bath, (b) wedding the roving before the wedded roving is placed by the winding program on the liner using at least one winding machines and winding the roving around the liner.
  • this invention relates to Light-Curing (UV-Light and light above a wave length of 430 nm) of composite cylinder during the filament winding process with the curing Light source after the resin bath or the curing Light inside the composite cylinder during the winding process.
  • the curing light beams are coming directly on the roving from the UV bulb, UV LED, LED with wave length above 430 nm to the light conductive flexible length winding shaft inside the liner or the winding shaft equipped with the light source.
  • the method includes inserting a winding shaft into the plastic liner where one end is fixed at the winding machine, the liner insert for the valve builds the second fixation and the third fixation point is inside of the liner at the bottom or outside of the liner bottom.
  • a curing light on winding shaft is in the centre of the liner and the curing of the roving on the liner starts during the winding process from inside the liner to the roving outside the liner, roving layer after roving layer is getting cured which results in a completely cured composite cylinder after the winding process is finished.
  • the cylinder can be removed from the winding machine cured, handled as a finished product, investment for curing oven is eliminated and most importantly reduced resin emissions due to immediate light curing, and by using curing light above 430 nm there is no protection required and no health risk for machine operator since the light source is far away from operator.
  • Fig. 1 shows the light conductive flexible length winding shaft inside the liner and in Fig. 2 the winding shaft equipped with the light source.
  • Fig. 1 shows the light conductive flexible length winding shaft inside the liner and in Fig. 2 the winding shaft equipped with the light source.
  • the present invention provides a method to cure the roving with resin on the liner (4) at high production speed with light (1 ) and light conductive flexible length winding shaft (3) and winding shaft equipped with light source (3a) from inside the liner with the light beams (7) evenly distributed on to the roving already wedded by the resin (5) during winding process.
  • Light curing resin in the resin bath (6) is wedding the roving (2) before the wedded roving (5) is placed by the winding program on the liner.
  • All winding machines (8) are wedding the roving (5) more or less in the same way and wind the roving around the liner (4) by following a special program.
  • Plastic inner liners (4) are used as core material for filament winding of composite cylinder and pressure vessels. These cylinders are used for Compressed Natural Gas (CNG) in Type 4 Cylinder and as alternative replacement of existing LPG steel cylinder.
  • CNG Compressed Natural Gas
  • the composite cylinder curing process is started with first roving placed on the plastic liner from inside the plastic liner.
  • the winding process of composite cylinders with plastic liner (4) is independent from pot life of resin because the curing process is initiated by light, the curing oven is eliminated, there is no harm to the machine operator through light, since the light source is far away from the operator and reduced resin emissions due to immediate light curing.
  • the composite cylinder is cured and can be removed from the winding machine and transported to the storage area or for further processing.

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Moulding By Coating Moulds (AREA)

Abstract

The present invention relates to a method to cure roving with resin on a liner (4) at high production speed, with light (1) and light conductive flexible length winding shaft (3) equipped with light source (3a), from inside the liner with light beams (7) evenly distributed on to the roving already wedded by the resin (5) during winding process. The method includes the steps of (a) wedding the roving (2) before the wedded roving (5) is placed by the winding program on the liner using a light curing resin in a resin bath (6), (b) wedding the roving (5) before the wedded roving (5) is placed by the winding program on the liner using at least one winding machines (8) and (c) winding the roving around the liner (4).

Description

A METHOD TO CURE ROVING WITH RESIN ON A LINER FIELD OF THE INVENTION
The present invention relates to a method to cure roving with resin on a liner. BACKGROUND OF THE INVENTION
Composite cylinder manufacturing is a very well developed technology with the highest technical and safety standards. Independent which kind of fibres and resins are used there is always the need of a curing oven, dependence on the pot life of the resin bath and the accuracy of mixing the resin with the hardener. On the other side there is the need to manufacture the composite cylinders faster at a very competitive price with minimum profit margin, energy saving and a repeatable constant resin and hardener mixture.
In today's winding process the roving is introduced to the resin bath, which is most of the time a double wall bath to keep the resin and hardener mixture cold in order to increase the pot life. The pot life is in most cases around 30 minutes and only during this time a constant amount of the resin mixture is sticking at the roving. To refill or to change to a new resin bath with new resin mixture is time consuming.
On the other side modern resins can also be cured with light sources such as bulbs, SMT LED or conventional LED's. Using light for curing has the advantage of unlimited pot life, of eliminating the curing oven, reduction of energy costs, LED's are environment friendly, LED's can be adjusted to match exactly the curing wave length of the resin and that the curing process can be finished directly at the winding machine without increasing the cycle time.
SUMMARY OF THE PRESENT INVENTION
Accordingly, there is provided a method to cure roving with resin on a liner at high production speed with light and light conductive flexible length winding shaft and winding shaft equipped with light source from inside the liner with the light beams evenly distributed on to the roving already wedded by the resin during winding process, the method includes the steps of (a) wedding the roving before the wedded roving is placed by the winding program on the liner using a light curing resin in a resin bath, (b) wedding the roving before the wedded roving is placed by the winding program on the liner using at least one winding machines and winding the roving around the liner.
The present invention consists of several novel features and a combination of parts hereinafter fully described and illustrated in the accompanying drawing, it being understood that various changes in the details may be made without departing from the scope of the invention or sacrificing any of the advantage of the present invention.
DETAILED DESCRIPTION OF THE INVENTION
A method to cure roving with resin on a liner. Hereinafter, this specification will describe the present invention according to the preferred embodiments of the present invention. However, it is to be understood that limiting the description to the preferred embodiments of the invention is merely to facilitate discussion of the present invention and it is envisioned that those skilled in the art may devise various modifications and equivalents without departing from the scope of the appended claims.
Broadly, this invention relates to Light-Curing (UV-Light and light above a wave length of 430 nm) of composite cylinder during the filament winding process with the curing Light source after the resin bath or the curing Light inside the composite cylinder during the winding process. The curing light beams are coming directly on the roving from the UV bulb, UV LED, LED with wave length above 430 nm to the light conductive flexible length winding shaft inside the liner or the winding shaft equipped with the light source.
The method includes inserting a winding shaft into the plastic liner where one end is fixed at the winding machine, the liner insert for the valve builds the second fixation and the third fixation point is inside of the liner at the bottom or outside of the liner bottom. With this method a curing light on winding shaft is in the centre of the liner and the curing of the roving on the liner starts during the winding process from inside the liner to the roving outside the liner, roving layer after roving layer is getting cured which results in a completely cured composite cylinder after the winding process is finished. With this method the cylinder can be removed from the winding machine cured, handled as a finished product, investment for curing oven is eliminated and most importantly reduced resin emissions due to immediate light curing, and by using curing light above 430 nm there is no protection required and no health risk for machine operator since the light source is far away from operator.
Reference is now made to Fig. 1 which shows the light conductive flexible length winding shaft inside the liner and in Fig. 2 the winding shaft equipped with the light source. The following description incorporates the references to the various features of the present invention as illustrated in the drawing.
The present invention provides a method to cure the roving with resin on the liner (4) at high production speed with light (1 ) and light conductive flexible length winding shaft (3) and winding shaft equipped with light source (3a) from inside the liner with the light beams (7) evenly distributed on to the roving already wedded by the resin (5) during winding process. Light curing resin in the resin bath (6) is wedding the roving (2) before the wedded roving (5) is placed by the winding program on the liner. All winding machines (8) are wedding the roving (5) more or less in the same way and wind the roving around the liner (4) by following a special program.
Plastic inner liners (4) are used as core material for filament winding of composite cylinder and pressure vessels. These cylinders are used for Compressed Natural Gas (CNG) in Type 4 Cylinder and as alternative replacement of existing LPG steel cylinder. The composite cylinder curing process is started with first roving placed on the plastic liner from inside the plastic liner.
With this invention the winding process of composite cylinders with plastic liner (4) is independent from pot life of resin because the curing process is initiated by light, the curing oven is eliminated, there is no harm to the machine operator through light, since the light source is far away from the operator and reduced resin emissions due to immediate light curing. After the winding cycle is finished the composite cylinder is cured and can be removed from the winding machine and transported to the storage area or for further processing.

Claims

1 . A method to cure roving with resin on a liner (4) at high production speed with light (1) and light conductive flexible length winding shaft (3) and winding shaft equipped with light source (3a) from inside the liner with the light beams (7) evenly distributed on to the roving already wedded by the resin (5) during winding process, the method includes the steps of:
(a) wedding the roving (2) before the wedded roving (5) is placed by the winding program on the liner using a light curing resin in a resin bath (6);
(b) wedding the roving (5) before the wedded roving (5) is placed by the winding program on the liner using at least one winding machines (8); and
(c) winding the roving around the liner (4).
2. The method as claimed in claim 1 , wherein the method uses light such as UVA, UVB, UVC or light above a wave length of 430 nm for curing process initiated by a light such as bulb, LED or LED SMT or other light source from inside the liner with or without winding shaft.
3. The method as claimed in claim 1 , wherein the liner (4) is a plastic inner liner.
4. The method as claimed in claim 3, wherein the plastic inner liner (4) is used as core material for filament winding of composite cylinder and pressure vessels.
5. The method as claimed in claim 3, wherein cylinders are used for Compressed Natural Gas (CNG) in Type 4 Cylinder. The method as claimed in claim 3, wherein the composite cylinder curing process is started with first roving placed on the plastic liner from inside the plastic liner.
EP10749923A 2009-08-13 2010-08-12 A method to cure roving with resin on a liner Withdrawn EP2464499A1 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
MYPI20093370A MY161446A (en) 2009-08-13 2009-08-13 A method to cure roving with resin on a liner
PCT/MY2010/000142 WO2011019268A1 (en) 2009-08-13 2010-08-12 A method to cure roving with resin on a liner

Publications (1)

Publication Number Publication Date
EP2464499A1 true EP2464499A1 (en) 2012-06-20

Family

ID=43838290

Family Applications (1)

Application Number Title Priority Date Filing Date
EP10749923A Withdrawn EP2464499A1 (en) 2009-08-13 2010-08-12 A method to cure roving with resin on a liner

Country Status (4)

Country Link
EP (1) EP2464499A1 (en)
CN (1) CN102497965A (en)
MY (1) MY161446A (en)
WO (1) WO2011019268A1 (en)

Family Cites Families (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE1704632A1 (en) * 1967-02-24 1971-05-19 Bayer Ag Winding mandrel and process for the production of pipes made of glass fiber reinforced thermosetting plastics
DE2421619C3 (en) * 1974-05-04 1982-07-08 Stiebel Eltron Gmbh & Co Kg, 3450 Holzminden Process for producing a glass fiber reinforced plastic molded part and device for carrying out the process
US6324833B1 (en) * 1990-04-24 2001-12-04 Cordant Technologies, Inc. Reinforced composite articles and method of making same
JP3950241B2 (en) * 1997-10-17 2007-07-25 三菱重工業株式会社 Resin composition, cured resin, and structure repair method, reinforcement method, repair material, reinforcement material
JPWO2007040023A1 (en) * 2005-10-03 2009-04-16 コニカミノルタオプト株式会社 Method and apparatus for producing uneven pattern film

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011019268A1 *

Also Published As

Publication number Publication date
MY161446A (en) 2017-04-14
CN102497965A (en) 2012-06-13
WO2011019268A1 (en) 2011-02-17

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