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WO2001084031A1 - Method to increase ring rigidity in pipes made from plastic-based material - Google Patents

Method to increase ring rigidity in pipes made from plastic-based material Download PDF

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Publication number
WO2001084031A1
WO2001084031A1 PCT/TR2000/000059 TR0000059W WO0184031A1 WO 2001084031 A1 WO2001084031 A1 WO 2001084031A1 TR 0000059 W TR0000059 W TR 0000059W WO 0184031 A1 WO0184031 A1 WO 0184031A1
Authority
WO
WIPO (PCT)
Prior art keywords
plastic
tubes
pipes
based material
layer
Prior art date
Application number
PCT/TR2000/000059
Other languages
French (fr)
Inventor
Teknik Plastik Boru Ve Elemanlari San.Ve Tic.A.Ş Dizayn
Adil Mirmahmutogullari
Ahmet Koyun
Original Assignee
Dizayn Teknik Plastik Boru Ve
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 Dizayn Teknik Plastik Boru Ve filed Critical Dizayn Teknik Plastik Boru Ve
Priority to PCT/TR2000/000059 priority Critical patent/WO2001084031A1/en
Publication of WO2001084031A1 publication Critical patent/WO2001084031A1/en

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
    • F16L9/14—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups
    • F16L9/147—Compound tubes, i.e. made of materials not wholly covered by any one of the preceding groups comprising only layers of metal and 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
    • 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
    • B29C53/64—Winding and joining, e.g. winding spirally helically using internal forming surfaces, e.g. mandrels rotatable about the winding axis and moving axially
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B32—LAYERED PRODUCTS
    • B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
    • B32B1/00—Layered products having a non-planar shape
    • B32B1/08—Tubular products
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
    • B29C48/09—Articles with cross-sections having partially or fully enclosed cavities, e.g. pipes or channels
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/15—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor incorporating preformed parts or layers, e.g. extrusion moulding around inserts
    • B29C48/151—Coating hollow articles
    • 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
    • B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
    • B29C48/16—Articles comprising two or more components, e.g. co-extruded layers
    • B29C48/18—Articles comprising two or more components, e.g. co-extruded layers the components being layers
    • B29C48/21—Articles comprising two or more components, e.g. co-extruded layers the components being layers the layers being joined at their surfaces
    • 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
    • B29L2009/00—Layered products
    • 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

  • ring rigidity The resistance of tubes against the deformation of shape due to suffered loads is called "ring rigidity". It is required that ring rigidity should be as high as possible.
  • one layer of the hot material at welding temperature obtained from extruder is wrapped on the mandrel and a hallow round or rectangular profile from the same material is wrapped on the first layer to provide the required rigidity.
  • the same material is used in all the layers in the present method.
  • the required ring rigidity may be obtain by increasing the tube wall-thickness.
  • the tubes produced by the present method can not be used at any place requiring internal pressure.
  • the tubes manufactured by the method we invented may also be used in the places where internal pressure in needed and it is possible to produce it at a lower cost than the present methods.
  • tubes produced by the present method can not be used in the places where internal pressure is required. But tubas resistant against external load as well as internal pressure can be produced by the method we invented.
  • tubes are produced at the wall thickness required for internal pressure ant minimum in three layers. The first and the last layers are made from plastic and the middle layer is made from metal or different plastic or the same plastic used in the first layer, but with improved mechanical characteristics or any filling material.
  • Figure 1 shows the schematic cross-section of the finished tube.
  • 1-1 and 1-3 are the layers from 1-1 or of metal or of plastic same as 1-1, but with improved characteristics or of any filling material, in tubes used in the places where internal pressure is required. In tubes where only external load exists, it a layer of plastic different from 1-1 or of metal or hollow or full profile from the same plastic with 1-1 with improved mechanical characteristics wrapped adjacently or separately.
  • Figure 2 shows the method to wrap spirally.
  • Cylindrical mandrel equal to the tube inner diameter, rotating around its axis, mounted on rail to move forward and backward.
  • 2-6 First layer on which 2-5 is wrapped.
  • 2-8 Extruder where profile or band from different plastic or from same plastic with improved mechanical characteristics are extruded in 1-2.
  • 2-9 Profile or band extruded by extruder 2-8 or metal profile 2-10 : Rail on which mandrel 2-5 moves.
  • 2-11 Middle layer wrapped on 2-6
  • granulated plastic-based material is extruded into profile and/or band through extruder 2-4 and wrapped on the mandrel 2-5, brought to welding temperature by heater 2-12, rotating at required speed, moving on rail 2-10 at required speed, placing one on top of the other and layer 2-6 is obtained.
  • Plastic-plated, groove cross-section metal-made tube or hollow or full profile obtained from extruder 2-8 is wrapped on mandrel 2-5 moving on rail 2-10, adjacently or separately over layer 2-6.
  • the layer in 2-11 is obtained.
  • granulated plastic-based material is extruded into profile and/or band through extruder 2-4 and wrapped on the mandrel 2-5, brought to welding temperature by heater 2-12, rotating at required speed, moving on rail 2-10 at required speed, placing one on top of the other and thus, layer 2-6 is obtained.
  • Metal-made profile of band or different plastic obtained from extruder 2-8 or profile or band from the same material with improved characteristics is wrapped on mandrel 2-5 moving on rail 2-10, over layer 2-6, placing one on top of the other.
  • layer 2-11 is obtained. This process is continued until required wall thickness is reached.
  • Profile or band obtained from extruder 2-4 is wrapped over layer 2-11 in one layer.
  • plastic-based tubes manufactured by the method we invented may be produced at required ring rigidity, according to the structure of soil, considering ground load where they are used. Tubes may be used in discharging housing and industrial waste water, in drainage systems, in raising or gravity flows. In case that metal is used as profile in places where earth movements occur, tubes protect their flexibility to a certain limit and then become rigid.
  • tubes made from plastic-based material will find a broad usage area.

Landscapes

  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Rigid Pipes And Flexible Pipes (AREA)
  • Extrusion Moulding Of Plastics Or The Like (AREA)
  • Shaping Of Tube Ends By Bending Or Straightening (AREA)

Abstract

Today, the usage areas of the pipes made from plastic-based material are spreading out day by day due to their benefits. Their lightness, their easy mounting, their easy transport, their flexibility, their welding capability are only a few reasons for preferring these pipes. These pipes may be placed in different places according to their purposes of use. Those which are used in discharging housing and industrial waste are placed under-ground. For this purpose it is required that their shapes should not be deformed against loads such as ground load and traffic load, that is, their ring rigidity and their load-resistance should be higher. In this invention, a material different from plastic is filled between two plastic layers wrapped around the pipe spirally in order to increase the rigidity of the pipe. Thus, the resistance of the pipe against external loads increases.

Description

SPECIFICATION
METHOD TO INCREASE RING RIGIDITY IN PIPES MADE FROM PLASTIC- BASED MATERIAL
The usage area of plastic-based materials are spreading out day by day. They are also used largely in manufacturing tubes. However, they are exposed to various external and internal loads depending on the place where there are used. The resistance of tubes against the deformation of shape due to suffered loads is called "ring rigidity". It is required that ring rigidity should be as high as possible. In the present method, one layer of the hot material at welding temperature obtained from extruder is wrapped on the mandrel and a hallow round or rectangular profile from the same material is wrapped on the first layer to provide the required rigidity. The same material is used in all the layers in the present method. The required ring rigidity may be obtain by increasing the tube wall-thickness. The tubes produced by the present method can not be used at any place requiring internal pressure.
It may be used only in the places with a gravity flow. The tubes manufactured by the method we invented may also be used in the places where internal pressure in needed and it is possible to produce it at a lower cost than the present methods.
In our method we invented, in case that there is only external load on the tube and a gravity flow, the material at welding temperature, then an externally plastic plated, groove cross-section metal tube or a hollow or full profile from the same plastic with improved mechanical characteristics or a hollow or full profile from a different plastic is wrapped on the first layer. The tubes produced by wrapping groove cross-section metal tube on plastic protect flexibility to a certain limit and become rigid to protect the tube when this limit is tried to be exceeded.
Those tubes produced by the present method can not be used in the places where internal pressure is required. But tubas resistant against external load as well as internal pressure can be produced by the method we invented. In our method, tubes are produced at the wall thickness required for internal pressure ant minimum in three layers. The first and the last layers are made from plastic and the middle layer is made from metal or different plastic or the same plastic used in the first layer, but with improved mechanical characteristics or any filling material.
If we want to increase ring rigidity by increasing the thickness of the material, tubes become heavier, transportation becomes more difficult and the cost increases. The cost of the tubes wrapped by hallow profile from the same material is a little lower, however it cost more than alternative tubes.
In the method we invented, it is possible to produce lighter and less expensive tubes by use of metal or different plastic or same plastic with improved characteristics or any filling material. It is possible to use low-cost material in middle layers. Even if metal is used, tubes protect their flexibility to a certain limit and become rigid when this 1-unit is exceeded.
Figure 1 shows the schematic cross-section of the finished tube. 1-1 and 1-3 are the layers from 1-1 or of metal or of plastic same as 1-1, but with improved characteristics or of any filling material, in tubes used in the places where internal pressure is required. In tubes where only external load exists, it a layer of plastic different from 1-1 or of metal or hollow or full profile from the same plastic with 1-1 with improved mechanical characteristics wrapped adjacently or separately.
Figure 2 shows the method to wrap spirally.
2-4 : The extruder where the profiles in layers 1-1 and 1-3 are extruded.
2-5 : Cylindrical mandrel, equal to the tube inner diameter, rotating around its axis, mounted on rail to move forward and backward.
2-6 : First layer on which 2-5 is wrapped. 2-8 : Extruder where profile or band from different plastic or from same plastic with improved mechanical characteristics are extruded in 1-2. 2-9 : Profile or band extruded by extruder 2-8 or metal profile 2-10 : Rail on which mandrel 2-5 moves. 2-11: Middle layer wrapped on 2-6
2-12 : Heater letting the profiles weld by heat.
Two different situations may be encountered in tubes. In the first situation, internal pressure is not important, but the resistance of the tube against external load is important. In the second situation, bot internal pressure and external load are important.
For the first situation, granulated plastic-based material is extruded into profile and/or band through extruder 2-4 and wrapped on the mandrel 2-5, brought to welding temperature by heater 2-12, rotating at required speed, moving on rail 2-10 at required speed, placing one on top of the other and layer 2-6 is obtained. Plastic-plated, groove cross-section metal-made tube or hollow or full profile obtained from extruder 2-8 is wrapped on mandrel 2-5 moving on rail 2-10, adjacently or separately over layer 2-6. Thus the layer in 2-11 is obtained.
For the second type tubes having both internal pressure and external load, granulated plastic-based material is extruded into profile and/or band through extruder 2-4 and wrapped on the mandrel 2-5, brought to welding temperature by heater 2-12, rotating at required speed, moving on rail 2-10 at required speed, placing one on top of the other and thus, layer 2-6 is obtained. Metal-made profile of band or different plastic obtained from extruder 2-8 or profile or band from the same material with improved characteristics is wrapped on mandrel 2-5 moving on rail 2-10, over layer 2-6, placing one on top of the other. Thus, layer 2-11 is obtained. This process is continued until required wall thickness is reached. Profile or band obtained from extruder 2-4 is wrapped over layer 2-11 in one layer. After this process is finished, mandrel 2-5 is taken out of the tube and the tube in Figure 1 is produced. Plastic-based tubes manufactured by the method we invented may be produced at required ring rigidity, according to the structure of soil, considering ground load where they are used. Tubes may be used in discharging housing and industrial waste water, in drainage systems, in raising or gravity flows. In case that metal is used as profile in places where earth movements occur, tubes protect their flexibility to a certain limit and then become rigid.
In addition to the mentioned benefits, as we can produce tubes at a lower cost by our method increasing ring rigidity, tubes made from plastic-based material will find a broad usage area.

Claims

It is a method to produce tubes by wrapping adjacently or separately the hallow or full plastic made from metal or made from a different plastic or the same plastic with its mechanical characteristics improved, after one layer of plastic are wrapped on the mandrel for the tubes having only external loads, used in the places where internal pressure is not important.
It is a method to produce tubes by wrapping at least three layers at the thickness required by internal pressure in those tubes having both external load and internal pressure, by filling the middle layer with metal or with a different plastic material or with the same plastic with its mechanical characteristics improved or any other material with a filling purpose.
PCT/TR2000/000059 2000-05-03 2000-11-07 Method to increase ring rigidity in pipes made from plastic-based material WO2001084031A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/TR2000/000059 WO2001084031A1 (en) 2000-05-03 2000-11-07 Method to increase ring rigidity in pipes made from plastic-based material

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
TR98/0048020000503 2000-05-03
PCT/TR2000/000059 WO2001084031A1 (en) 2000-05-03 2000-11-07 Method to increase ring rigidity in pipes made from plastic-based material

Publications (1)

Publication Number Publication Date
WO2001084031A1 true WO2001084031A1 (en) 2001-11-08

Family

ID=21619309

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/TR2000/000059 WO2001084031A1 (en) 2000-05-03 2000-11-07 Method to increase ring rigidity in pipes made from plastic-based material

Country Status (1)

Country Link
WO (1) WO2001084031A1 (en)

Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0111169A2 (en) * 1982-11-15 1984-06-20 Adolf Rundel Multilayered tube

Patent Citations (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0111169A2 (en) * 1982-11-15 1984-06-20 Adolf Rundel Multilayered tube

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