WO2004000522A1 - Verfahren zur herstellung von glasfaserverstärkten rohren - Google Patents
Verfahren zur herstellung von glasfaserverstärkten rohren Download PDFInfo
- Publication number
- WO2004000522A1 WO2004000522A1 PCT/EP2003/005185 EP0305185W WO2004000522A1 WO 2004000522 A1 WO2004000522 A1 WO 2004000522A1 EP 0305185 W EP0305185 W EP 0305185W WO 2004000522 A1 WO2004000522 A1 WO 2004000522A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- glass fiber
- sand
- layer
- layers
- sand layer
- Prior art date
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L9/00—Rigid pipes
- F16L9/12—Rigid pipes of plastics with or without 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
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/003—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor characterised by the choice of material
-
- 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
- B29C41/00—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor
- B29C41/02—Shaping by coating a mould, core or other substrate, i.e. by depositing material and stripping-off the shaped article; Apparatus therefor for making articles of definite length, i.e. discrete articles
- B29C41/04—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould
- B29C41/042—Rotational or centrifugal casting, i.e. coating the inside of a mould by rotating the mould by rotating a mould around its axis of symmetry
-
- 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
-
- 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
- B29K2105/12—Condition, form or state of moulded material or of the material to be shaped containing reinforcements, fillers or inserts of short lengths, e.g. chopped filaments, staple fibres or bristles
-
- 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
- B29K2709/00—Use of inorganic materials not provided for in groups B29K2703/00 - B29K2707/00, for preformed parts, e.g. for inserts
-
- 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
- B29L2023/00—Tubular articles
- B29L2023/22—Tubes or pipes, i.e. rigid
Definitions
- the invention relates to a process for the production of, in particular, centrifuged glass fiber-reinforced plastic pipes, liquid curable resin, which may contain a filler, together with glass fibers and additives for curing, including sand, being introduced into a rotating die and several layers of sand being used.
- WO 01/83185 describes a process for producing sand-filled, spun glass-fiber reinforced plastic tubes, in which the glass fiber content in the reinforced layers can be increased. This is important if the pipes have a large wall thickness, i.e. a large diameter, or are to be designed for large internal pressures, since otherwise the heat development can become too high.
- liquid curable resin which may contain a filler, is introduced into a rotating die together with glass fibers and additives for curing, as well as with sand.
- several layers of sand are used to compact the individual layers reinforced with glass fibers.
- Standard glass-fiber reinforced plastic pipes that meet the requirements for tightness and deformability usually have transition layers between the glass-fiber-reinforced armors with regard to the requirement for deformability in the circumferential direction, especially in the case of large diameters. parts and the middle sand layer.
- the transition layers contain glass fibers (roving) in an amount of 3 to 10% and the middle sand layer contains glass fibers in an amount of 0 to 3%.
- the tubes have a roving layer about 1 mm thick with good axial orientation and a glass fiber content of about 30%. This is followed by an approximately 1 mm thick roving layer with orientation mainly in the circumferential direction and a glass fiber content of approximately 35%.
- these two layers together form the barrier layer.
- a roving layer with a circumferential orientation and an even higher glass fiber content serve to withstand the internal pressure together with the roving outer layers.
- the standard values for the glass fiber content in the outer part are 70% for the roving layer with circumferential orientation and 62% for the roving layer with axial orientation.
- the layer thicknesses depend on the pipe diameter, nominal pressure and rigidity. Only the thicknesses of the two barrier layers mentioned are constant, namely essentially 1 mm per layer.
- the invention has for its object to produce, in particular, centrifuged glass fiber reinforced tubes with larger diameters and for higher pressures at low cost, the risk of crack formation being avoided.
- a glass fiber reinforced plastic tube with several layers of glass fibers, synthetic resin, sand and additives according to the invention is specified in claim 7.
- liquid curable resin which may contain a filler
- glass fibers and additives for curing also with sand.
- sand Several layers of sand are used. The middle sand layer is divided by a glass fiber layer, the Glass fiber amount is dimensioned according to a desired nominal pressure.
- the construction of a sand-filled glass fiber reinforced plastic pipe according to the invention is such that the tightness and deformation requirements are met.
- the middle sand layer is partially replaced in a corresponding amount by glass fiber with regard to the desired increased requirements, so that the glass fiber content is sufficiently high to meet higher pressure requirements.
- the central glass fiber layer is surrounded by layers of sand, it is strongly compacted by these layers of sand.
- the compression reduces the content of polyester resin and the glass fiber layer does not heat up as much.
- the risk of cracking in the pipe, which is present in pipes with only a middle layer of sand is reduced and the raw material costs are reduced compared to pipes with only a middle layer of sand.
- the divided middle sand layer is advantageously provided with a transition layer on the inside and outside, which contains sand, resin and glass fiber, in order to better meet the requirements for tightness and deformability.
- Cut glass fiber (roving) with lengths of 25 to 100 mm is preferably used.
- the fiber lengths are usually 25 mm and in those with circumferential orientation 50 mm. Larger roving lengths (> 50 mm) are used for diameters from DN 100 (100 mm).
- the glass fiber proportions are expediently 0 to 3% for the middle sand layer, 3 to 10% for the transition layers, 30% for the axially oriented roving layers and 35% for the roving layers in the inner part oriented in the circumferential direction.
- the compression in the central roving layer increases to approx. 70%.
- the glass fiber parts of the outer part have higher values.
- the method according to the invention can also be applied to winding tubes. Continuous roving is used for these. However, cut roving is used on the inside and in the sand layer, with the transition layers usually being omitted. As a result of the increased water absorption compared to hurled pipes, the water absorption is greater and it is even more important to reduce the heat generation in order to reduce the risk of cracking.
- Fig. 1 to 6 for three examples, the construction of pipes for different sizes and pressures.
- the structure of a tube as illustrated in FIG. 2 and from which the invention is based is described below.
- the pipe is a multi-layer pipe DN 1000 (nominal width 1,000 mm), PN 10 (nominal pressure 9.8 bar), SN 10,000 (nominal rigidity 10,000 N / m 2 ). It has a medium layer of sand with a thickness of 14 mm and two transition layers. The amount of glass fiber in the tube is 15 kg per meter.
- the tube is designed to meet the requirements for glass fiber reinforced pressure tubes.
- the glass fiber content must be increased to 33 kg per meter, i.e. by 18 kg per meter. This amount of sand in the middle layer of sand is replaced by glass fiber.
- the glass fiber layer is strongly compacted by the neighboring sand layers, down to a glass fiber content of about 70%. According to the calculation, 5 mm of the sand layer are replaced by a glass fiber layer.
- the resulting tube is shown in Fig. 1.
- the raw material costs are reduced by 7% compared to the tube of FIG. 2.
- the construction of a second example of a pipe according to the invention is illustrated in FIG. 3, a pipe with a construction according to FIG. 4 being considered first.
- the pipe is again a multi-layer pipe DN 1,600 (nominal width 1,600 mm), PN 6 (nominal pressure 5.9 bar), SN 10,000 (nominal rigidity 10,000 N / m 2 ).
- the pipe has a sand layer in the middle with a layer thickness of 26 kg per meter.
- the glass fiber content In order to design the pipe for a nominal pressure PN 16 (15.7 bar), the glass fiber content must be increased to 61 kg per meter, i.e. by 35 kg per meter. This means that 5.6 mm of sand is replaced by glass fiber.
- the resulting tube is shown in FIG. 3.
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Rigid Pipes And Flexible Pipes (AREA)
- Moulding By Coating Moulds (AREA)
- Laminated Bodies (AREA)
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
AU2003236667A AU2003236667A1 (en) | 2002-06-20 | 2003-05-16 | Method for producing glass fibre reinforced tubes |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10227578.5 | 2002-06-20 | ||
DE2002127578 DE10227578A1 (de) | 2002-06-20 | 2002-06-20 | Verfahren zur Herstellung von glasfaserverstärkten Rohren |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2004000522A1 true WO2004000522A1 (de) | 2003-12-31 |
Family
ID=29719298
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/EP2003/005185 WO2004000522A1 (de) | 2002-06-20 | 2003-05-16 | Verfahren zur herstellung von glasfaserverstärkten rohren |
Country Status (4)
Country | Link |
---|---|
AU (1) | AU2003236667A1 (de) |
DE (1) | DE10227578A1 (de) |
TR (1) | TR200403479T2 (de) |
WO (1) | WO2004000522A1 (de) |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1475580A1 (de) * | 1964-11-06 | 1969-03-27 | Hoeganaesmetoder Ab | Kunststoffrohr und Verfahren zu seiner Herstellung |
DE2042073A1 (de) * | 1969-09-12 | 1971-04-01 | Basler Stueckfaerberei Ag | Faserverstaerktes,flexibles Kunststoffrohr und Verfahren zu dessen Herstellung |
WO2001083185A2 (de) * | 2000-04-27 | 2001-11-08 | C-Tech Ltd. | Verfahren und anlage zur herstellung von geschleuderten glasfaserverstärkten rohren |
-
2002
- 2002-06-20 DE DE2002127578 patent/DE10227578A1/de not_active Withdrawn
-
2003
- 2003-05-16 TR TR2004/03479T patent/TR200403479T2/xx unknown
- 2003-05-16 WO PCT/EP2003/005185 patent/WO2004000522A1/de not_active Application Discontinuation
- 2003-05-16 AU AU2003236667A patent/AU2003236667A1/en not_active Abandoned
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE1475580A1 (de) * | 1964-11-06 | 1969-03-27 | Hoeganaesmetoder Ab | Kunststoffrohr und Verfahren zu seiner Herstellung |
DE2042073A1 (de) * | 1969-09-12 | 1971-04-01 | Basler Stueckfaerberei Ag | Faserverstaerktes,flexibles Kunststoffrohr und Verfahren zu dessen Herstellung |
WO2001083185A2 (de) * | 2000-04-27 | 2001-11-08 | C-Tech Ltd. | Verfahren und anlage zur herstellung von geschleuderten glasfaserverstärkten rohren |
Also Published As
Publication number | Publication date |
---|---|
DE10227578A1 (de) | 2004-01-08 |
AU2003236667A1 (en) | 2004-01-06 |
TR200403479T2 (tr) | 2005-03-21 |
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