PT2008139004W - Method for manufacturing a three-layer corrugated pipe, head therefor and the resulting pipe - Google Patents
Method for manufacturing a three-layer corrugated pipe, head therefor and the resulting pipe Download PDFInfo
- Publication number
- PT2008139004W PT2008139004W PT2007070092A PT2007070092A PT2008139004W PT 2008139004 W PT2008139004 W PT 2008139004W PT 2007070092 A PT2007070092 A PT 2007070092A PT 2007070092 A PT2007070092 A PT 2007070092A PT 2008139004 W PT2008139004 W PT 2008139004W
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- Prior art keywords
- layer
- tube
- corrugated
- triple wall
- pipe
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Classifications
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- 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
- B29C57/00—Shaping of tube ends, e.g. flanging, belling or closing; Apparatus therefor, e.g. collapsible mandrels
- B29C57/02—Belling or enlarging, e.g. combined with forming a groove
-
- 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
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- 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
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/04—Hoses, i.e. flexible pipes made of rubber or flexible plastics
- F16L11/11—Hoses, i.e. flexible pipes made of rubber or flexible plastics with corrugated wall
-
- 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
- F16L11/00—Hoses, i.e. flexible pipes
- F16L11/14—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics
- F16L11/15—Hoses, i.e. flexible pipes made of rigid material, e.g. metal or hard plastics corrugated
-
- 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
- F16L47/00—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics
- F16L47/06—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end
- F16L47/08—Connecting arrangements or other fittings specially adapted to be made of plastics or to be used with pipes made of plastics with sleeve or socket formed by or in the pipe end with sealing rings arranged between the outer surface of one pipe end and the inner surface of the sleeve or socket, the sealing rings being placed previously in the sleeve or socket
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- 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
- 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
- B29C48/03—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
- B29C48/13—Articles with a cross-section varying in the longitudinal direction, e.g. corrugated pipes
-
- 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
- B29L2023/00—Tubular articles
- B29L2023/18—Pleated or corrugated hoses
-
- 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
- B29L2023/18—Pleated or corrugated hoses
- B29L2023/186—Pleated or corrugated hoses having a smooth internal wall
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
11
DESCRIÇÃODESCRIPTION
"MÉTODO PARA O FABRICO DE UM TUBO CORRUGADO DE PAREDE TRIPLA, CABEÇA UTILIZADA NO SEU FABRICO E TUBO ASSIM OBTIDO"" METHOD FOR THE MANUFACTURE OF A CORRUGATED TRIPLE WALL TUBE, HEAD USED IN ITS MANUFACTURE AND PIPE SO OBTAINED "
OBJECTO DA INVENÇÃO É objecto da presente invenção tanto o método de fabrico de um tubo corrugado de parede tripla, como a cabeça utilizada no fabrico da parede exterior do tubo, bem como o tubo obtido por meio do presente método. A presente invenção é caracterizada as próprias etapas de fabrico do tubo corrugado de parede tripla e, de maneira particular, a forma e os materiais utilizados na disposição de uma terceira camada que seria a parede externa do conjunto, bem como o processo posterior de abocardado que tem lugar na extremidade do tubo. A presente invenção é também caracterizada pela configuração e desenho especiais da cabeça utilizada na fabricação da parede externa do tubo corrugado de parede tripla.OBJECT OF THE INVENTION The object of the present invention is both the method of manufacturing a triple wall corrugated pipe, such as the head used in the manufacture of the outer wall of the pipe, as well as the pipe obtained by the present method. The present invention is characterized the manufacturing steps of the triple wall corrugated tube and, in particular, the shape and materials used in the arrangement of a third layer which would be the outer wall of the assembly, as well as the subsequent process of flaring which takes place at the end of the tube. The present invention is also characterized by the special configuration and design of the head used in the manufacture of the outer wall of the triple wall corrugated pipe.
Deste modo, a presente invenção está circunscrita ao âmbito dos tubos estruturados e, de maneira mais precisa, dos tubos corrugados de parede tripla.Thus, the present invention is circumscribed to the scope of the structured tubes and, more precisely, the triple wall corrugated tubes.
ANTECEDENTES DA INVENÇÃOBACKGROUND OF THE INVENTION
No campo da técnica da presente invenção, são conhecidos os tubos corrugados, alguns deles como o tipo de tubos apresentados na patente EP 385465 que, apesar de apresentar um tubo corrugado, não é um tubo de parede tripla e, além 2 disso, é formado por uma série de conjuntos alveolares que emergem de uma superfície plana disposta na base.In the field of the art of the present invention, corrugated tubes are known, some of them as the type of tubes disclosed in EP 385465 which, despite having a corrugated tube, is not a triple wall tube and, in addition, is formed by a series of honeycomb arrays that emerge from a flat surface disposed in the base.
Em outros casos são conhecidos tubos corrugados de parede tripla que são formados por uma camada central e corrugada com qualquer desenho, disposta entre uma camada inferior que seria a parede interior do tubo, cuja camada é lisa e cilíndrica e entre uma camada que seria a parede exterior do tubo, também lisa e cilíndrica.In other cases triple wall corrugated pipes are known which are formed by a central corrugated layer of any design, disposed between a lower layer which would be the inner wall of the tube, which layer is smooth and cylindrical and between a layer which would be the wall outside the tube, also smooth and cylindrical.
No entanto, estes tubos corrugados de parede tripla utilizam polietileno como material para todas as camadas, o qual, embora sirva para cumprir as necessidades para as quais se utiliza o tubo, não cumpre de maneira satisfatória todas as situações e necessidades às quais se poderia submeter o tubo.However, these three-wall corrugated pipes use polyethylene as a material for all layers, which, while serving the needs for which the pipe is used, does not satisfactorily fulfill all the situations and needs to which it could be subjected the tube.
Por outro lado, no método de fabrico dos tubos de parede tripla que existem actualmente, o fabrico da terceira camada não se realiza por meio de uma cabeça de extrusão que aplica a referida terceira camada directamente sobre a alma corrugada do tubo.On the other hand, in the method of manufacturing the three-wall tubes that currently exist, the manufacture of the third layer is not achieved by means of an extrusion head which applies said third layer directly onto the corrugated web of the tube.
Outra dificuldade presente no método de fabrico existente é a ausência de qualquer operação de abocardado nas extremidades dos tubos depois de fabricados, com um desenho concreto que permita realizar a ligação entre secções de tubos corrugados de parede tripla de uma maneira fácil, simples e eficaz.Another difficulty present in the existing method of manufacture is the absence of any flaring operation at the ends of the tubes after they are manufactured, with a concrete design which enables the connection between sections of triple wall corrugated pipes in an easy, simple and efficient manner.
Deste modo, é objecto da presente invenção superar os inconvenientes derivados do método de fabrico existente até o momento no fabrico de tubos corrugados de parede tripla, 3 melhorando as etapas necessárias, os materiais utilizados no fabrico, bem como a maquinaria necessária para a referida finalidade.Accordingly, it is the object of the present invention to overcome the drawbacks deriving from the method of manufacture so far in the manufacture of triple wall corrugated tubes, 3 improving the necessary steps, the materials used in the manufacture, and the machinery required for said purpose .
DESCRIÇÃO DA INVENÇÃO A presente invenção tem como objectivo um método de fabrico de um tubo corrugado de parede tripla, bem como os meios utilizados no fabrico do referido tubo, e o tubo obtido pelo método e os meios descritos. 0 método de fabrico de um tubo corrugado de parede tripla começaria por um conjunto base formado por uma camada corrugada central disposta sobre uma camada inferior ou base, que é lisa e cilíndrica e em conformidade com a camada interior do tubo final e que constaria das seguintes etapas: 0 referido conjunto base é feito passar por uma cabeça de extrusão que aplica a terceira camada que ficaria apoiada sobre as cristãs da parede central ou alma.DESCRIPTION OF THE INVENTION The present invention is directed to a method of manufacturing a triple wall corrugated tube as well as the means used in the manufacture of said tube, and the tube obtained by the method and means described. The method of manufacturing a triple wall corrugated pipe would begin with a base assembly formed of a central corrugated layer disposed on a lower layer or base, which is smooth and cylindrical and in accordance with the inner layer of the end pipe and which would consist of the following steps: Said base assembly is passed through an extrusion head which applies the third layer which would be supported on the Christians of the central wall or web.
Abocardado de pelo menos uma extremidade do tubo que permita o acoplamento e conexão das secções de tubo corrugado de parede tripla de forma estanque. 0 material utilizado no fabrico do tubo de parede tripla é o polipropileno, este material em comparação com o polietileno apresenta um comportamento melhor tanto mecânico como térmico. 0 polipropileno apresenta um dos alongamentos em tracção mais altos, é um dos materiais que apresenta mais resistência ao impacto entre todos os termoplásticos e é mais duro que o polietileno, além de ter uma temperatura de fusão superior à do polietileno e uma 4 memória plástica que permite recuperar a sua posição depois de uma deformação. A cabeça de aplicação da terceira camada no processo de fabrico do tubo corrugado de parede tripla apresenta uma configuração genérica anular que permite uma perfeita aplicação sobre as cristãs da camada central corrugada, além de poder controlar o volume ou espessura da terceira camada.Flanged with at least one end of the tube which allows the coupling and connection of the triple wall corrugated pipe sections in a leaktight manner. The material used in the manufacture of the triple wall tube is polypropylene, this material compared to polyethylene exhibits better mechanical and thermal performance. Polypropylene exhibits one of the highest tensile stretches, it is one of the materials which exhibits the most impact resistance among all thermoplastics and is harder than polyethylene, in addition to having a melting temperature higher than that of polyethylene and a plastic memory which allows it to recover its position after a deformation. The application head of the third layer in the process of manufacturing the triple wall corrugated tube has a generic annular configuration which allows a perfect application on the Christians of the corrugated central layer, in addition to being able to control the volume or thickness of the third layer.
DESCRIÇÃO DAS FIGURASDESCRIPTION OF THE FIGURES
Para complementar a descrição que se realizará a seguir com o objectivo de auxiliar numa melhor compreensão das suas características, encontra-se anexo à presente memória descritiva um conjunto de planos em cujas figuras estão representados, de forma ilustrativa e não limitativa, os pormenores mais significativos da invenção. A figura 1 ilustra uma representação da estrutura e composição de um tubo corrugado de parede tripla. A figura 2 ilustra de forma seccionada uma cabeça de aplicação da terceira camada de acordo com o método de fabrico da terceira camada. A figura 3 ilustra duas secções de tubo dispostos de modo a serem conectados onde sobre uma das bordas de uma secção de tubo foi criado um abocardado. A figura 4 ilustra os tubos anteriores conectados.In order to complement the following description with the aim of assisting in a better understanding of its characteristics, a set of plans in which the figures are represented, illustratively and not limitatively, are attached to the present specification of the invention. Figure 1 shows a representation of the structure and composition of a triple wall corrugated pipe. Figure 2 shows in cross-sectional form an application head of the third layer according to the method of manufacture of the third layer. Figure 3 shows two tube sections arranged to be connected where a flare was created on one of the edges of a tube section. Figure 4 shows the connected front tubes.
FORMA DE REALIZAÇÃO PREFERIDA DA INVENÇÃO 5PREFERRED EMBODIMENT OF THE INVENTION
Tendo em conta as figuras, é descrita a seguir uma forma de realização preferida da invenção proposta. A figura 1 ilustra a configuração estrutural que é apresentada por um tubo corrugado de parede tripla de acordo com a invenção que é formada por uma camada central corrugada (2) disposta sobre uma camada base (1) lisa e cilíndrica que será a parede interior do tubo final. Sobre as cristãs superiores da parede central há uma terceira camada (3) que será a parede exterior do tubo. A geometria e a configuração da parede central corrugada não são limitativas, sendo possível escolher a configuração que melhor se adapte aos fins pretendidos. A essencialidade da invenção consiste no método de fabrico do tubo e, de uma maneira mais concreta, na terceira camada (3) do tubo corrugado de parede tripla, bem como no processo subsequente de abocardado criado em pelo menos uma das extremidades do tubo obtido. A terceira camada (3) é aplicada por meio de extrusão, utilizando-se para este fim uma cabeça extrusora de aplicação que permite o controlo da largura ou espessura da terceira camada (3).In view of the figures, a preferred embodiment of the proposed invention is described below. Figure 1 shows the structural configuration which is presented by a triple wall corrugated pipe according to the invention which is formed by a corrugated central layer (2) arranged on a smooth cylindrical base layer (1) which will be the inner wall of the end tube. On the upper Christians of the central wall there is a third layer (3) which will be the outer wall of the tube. The geometry and configuration of the corrugated central wall are not limiting, it being possible to choose the configuration that best suits the intended purposes. The essential feature of the invention is the method of manufacturing the tube and, more specifically, the third layer 3 of the triple wall corrugated tube as well as the subsequent process of flaring created on at least one end of the obtained tube. The third layer 3 is extruded using an application extruder head for controlling the width or thickness of the third layer 3.
Deste modo, na figura 2 observamos a cabeça (4) de aplicação da terceira camada que apresenta uma configuração genérica anular, que tem um corpo (5) sobre o qual há uma peça ou distribuidor (6) de material da terceira camada (3) . A referida peça distribuidora (6) está disposta de forma concêntrica em relação ao corpo (5) . Conectadas com as peças anteriores há, por um lado, uma peça fêmea (8) destinada a calibrar o diâmetro exterior que teria a terceira camada, bem como uma peça macho (7) que será 6 destinada a definir o diâmetro interior da terceira camada (3) . Finalmente, há um mecanismo (9) que permite controlar a espessura da terceira camada. A cabeça de extrusão (4), logicamente, deve estar conectada, por meio de uma peça de acoplamento (11) através da qual flui o material (10) utilizado no fabrico da terceira camada, com o depósito ou fonte fornecedora do material utilizado na extrusão da terceira camada.In this way, in figure 2, we can observe the head (4) of applying the third layer having a generally annular configuration, having a body (5) on which there is a part or a distributor (6) of material of the third layer (3) . Said distributing member (6) is disposed concentrically with respect to the body (5). Connected with the above parts there is, on the one hand, a female part (8) for calibrating the outer diameter of the third layer, as well as a male part (7) which is intended to define the inner diameter of the third layer ( 3). Finally, there is a mechanism (9) for controlling the thickness of the third layer. The extrusion head 4 must, of course, be connected, by means of a coupling piece 11 through which the material 10 used in the manufacture of the third layer flows, with the reservoir or source supplying the material used in the third layer extrusion.
Na figura 3 está ilustrado um entre os possíveis aspectos que poderia ter o abocardado criado numa das extremidades do tubo depois do fabrico deste.In figure 3 one is shown among the possible aspects that the flared one created in one of the ends of the tube after the manufacture of this one could have.
Observamos que o referido abocardado (17) tomado a partir da parte mais interna do tubo até a sua extremidade livre, seria formado por uma primeira secção inclinada (12) que aumentaria o seu diâmetro interior, seguido por uma secção recta (13) à qual segue um re-espessamento (14) realizado até o exterior que define no interior do tubo um alojamento (15) de uma junta elastomérica (18) (figura 4). O ponto de conexão entre a secção inclinada (12) e a secção recta define um ponto limite (16) até onde o tubo a ser conectado pode penetrar, tal como pode ser observado na figura 4.We note that said flared (17) taken from the innermost part of the pipe to its free end would be formed by a first inclined section (12) which would increase its inner diameter, followed by a straight section (13) to which there is a re-thickening (14) carried out to the outside defining a housing (15) of an elastomeric seal (18) within the tube (Figure 4). The connection point between the inclined section (12) and the cross-section defines a limit point (16) as far as the pipe to be connected can penetrate, as can be seen in figure 4.
As variações de materiais, forma, tamanho e disposição dos elementos componentes, descritos de forma não limitativa, não alteram a essência desta invenção, sendo esta suficiente para a sua reprodução por um especialista na técnica.Variations in materials, shape, size and arrangement of the component elements, described in a non-limiting manner, do not alter the essence of this invention, which is sufficient for reproduction by a person skilled in the art.
Lisboa, 07 de Maio de 2010Lisbon, May 07, 2010
Claims (4)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| PCT/ES2007/070092 WO2008139004A1 (en) | 2007-05-14 | 2007-05-14 | Method for manufacturing a three-layer corrugated pipe, head therefor and the resulting pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| PT2008139004W true PT2008139004W (en) | 2010-06-15 |
Family
ID=38972954
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PT2007070092A PT2008139004W (en) | 2007-05-14 | 2007-05-14 | Method for manufacturing a three-layer corrugated pipe, head therefor and the resulting pipe |
Country Status (3)
| Country | Link |
|---|---|
| ES (1) | ES2370484B1 (en) |
| PT (1) | PT2008139004W (en) |
| WO (1) | WO2008139004A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102390118A (en) * | 2011-10-24 | 2012-03-28 | 广东联塑机器制造有限公司 | Production device and production method of three-wall corrugated pipe |
Family Cites Families (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3372920A (en) * | 1965-07-12 | 1968-03-12 | Nat Distillers Chem Corp | Method for producing thermoplastic sheet material |
| DE2042031A1 (en) * | 1970-08-25 | 1972-05-31 | Reifenhaeuser Kg | Extruding corrugated thermoplast tube - with smooth tube inside or outside bonded to it |
| ATE113356T1 (en) * | 1989-03-03 | 1994-11-15 | Pipelife Rohrsysteme Gmbh | PROCESS FOR MAKING A PLASTIC SEWER PIPE. |
| DE4240268A1 (en) * | 1992-12-01 | 1994-06-09 | Wilhelm Hegler | Method and device for the continuous production of a composite pipe with an essentially smooth outer section |
| DE19504501A1 (en) * | 1995-02-13 | 1996-08-14 | Wilhelm Hegler | Process and plant for producing a multilayer pipe made of thermoplastic, in particular polyolefin |
| DE29616289U1 (en) * | 1996-09-19 | 1996-11-28 | Unicor Rohrsysteme Gmbh | Multi-layer plastic tube |
| ATE288046T1 (en) * | 2000-04-12 | 2005-02-15 | Eureka Immobiliare S R L | SHAFT TUBE WITH EXTERNAL PROTECTIVE FILM |
| US20030090112A1 (en) * | 2001-11-14 | 2003-05-15 | Brad Baughman | Pipe joint assembly |
| US7329113B2 (en) * | 2004-03-19 | 2008-02-12 | Leseman Steven R | Adjustable extrusion die |
| CA2464245C (en) * | 2004-04-08 | 2007-12-04 | Manfred A. A. Lupke | Method of forming corrugated pipe with a pipe spigot seal seat |
-
2007
- 2007-05-14 PT PT2007070092A patent/PT2008139004W/en unknown
- 2007-05-14 ES ES200950055A patent/ES2370484B1/en not_active Withdrawn - After Issue
- 2007-05-14 WO PCT/ES2007/070092 patent/WO2008139004A1/en active Application Filing
Also Published As
| Publication number | Publication date |
|---|---|
| WO2008139004A1 (en) | 2008-11-20 |
| ES2370484B1 (en) | 2012-11-27 |
| ES2370484A1 (en) | 2011-12-16 |
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