CH625997A5 - Process for producing pipes provided with an insulating sleeve of foam plastic - Google Patents
Process for producing pipes provided with an insulating sleeve of foam plastic Download PDFInfo
- Publication number
- CH625997A5 CH625997A5 CH1478277A CH1478277A CH625997A5 CH 625997 A5 CH625997 A5 CH 625997A5 CH 1478277 A CH1478277 A CH 1478277A CH 1478277 A CH1478277 A CH 1478277A CH 625997 A5 CH625997 A5 CH 625997A5
- Authority
- CH
- Switzerland
- Prior art keywords
- insulating sleeve
- pipes
- tube
- insulating
- strip
- Prior art date
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Classifications
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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
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/153—Arrangements for the insulation of pipes or pipe systems for flexible pipes
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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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/36—Bending and joining, e.g. for making hollow articles
- B29C53/38—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges
- B29C53/48—Bending and joining, e.g. for making hollow articles by bending sheets or strips at right angles to the longitudinal axis of the article being formed and joining the edges for articles of indefinite length, i.e. bending a strip progressively
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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
- B29C61/00—Shaping by liberation of internal stresses; Making preforms having internal stresses; Apparatus therefor
- B29C61/02—Thermal shrinking
- B29C61/025—Thermal shrinking for the production of hollow or tubular articles
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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
- B29C63/00—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor
- B29C63/02—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material
- B29C63/04—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like
- B29C63/06—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like around tubular articles
- B29C63/065—Lining or sheathing, i.e. applying preformed layers or sheathings of plastics; Apparatus therefor using sheet or web-like material by folding, winding, bending or the like around tubular articles continuously
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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
- B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
- B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
- B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
- B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
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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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/01—General aspects dealing with the joint area or with the area to be joined
- B29C66/05—Particular design of joint configurations
- B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
- B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
- B29C66/114—Single butt joints
- B29C66/1142—Single butt to butt joints
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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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/72—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined
- B29C66/727—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the structure of the material of the parts to be joined being porous, e.g. foam
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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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one 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
- B29C71/00—After-treatment of articles without altering their shape; Apparatus therefor
- B29C71/02—Thermal after-treatment
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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
- F16L59/00—Thermal insulation in general
- F16L59/14—Arrangements for the insulation of pipes or pipe systems
- F16L59/143—Pre-insulated 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
- B29C66/432—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
- B29C66/4322—Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms by joining a single sheet to itself
-
- 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
- B29C66/00—General aspects of processes or apparatus for joining preformed parts
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of the parts to be joined
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- 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
- B29K2023/00—Use of polyalkenes or derivatives thereof as moulding material
- B29K2023/04—Polymers of ethylene
- B29K2023/06—PE, i.e. polyethylene
-
- 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
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- 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
- B29K2105/046—Condition, form or state of moulded material or of the material to be shaped cellular or porous with closed cells
-
- 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
- B29K2705/00—Use of metals, their alloys or their compounds, for preformed parts, e.g. for inserts
- B29K2705/08—Transition metals
- B29K2705/10—Copper
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- 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
- B29L2023/225—Insulated
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- 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
- B29L2031/60—Multitubular or multicompartmented articles, e.g. honeycomb
- B29L2031/601—Multi-tubular articles, i.e. composed of a plurality of tubes
- B29L2031/602—Multi-tubular articles, i.e. composed of a plurality of tubes composed of several elementary tubular elements
Description
Die Erfindung ist in der Zeichnung an einem Ausführungsbeispiel dargestellt und wird anhand dessen nachfolgend näher erläutert. The invention is shown in the drawing using an exemplary embodiment and is explained in more detail below with reference to the same.
Es zeigen: Show it:
Fig. 1 eine schematische Darstellung des Verfahrensablaufes an einer Vorrichtung zum Herstellen von mit Schaumstoffstreifen isolierten Rohren, 1 is a schematic representation of the process sequence on a device for producing pipes insulated with foam strips,
Fig. 2 einen schematischen Querschnitt durch die Vorrichtung nach Schnitt A-A nach Fig. 1, 2 shows a schematic cross section through the device according to section A-A according to FIG. 1,
Fig. 3 eine schematische Ansicht der Vorrichtung nach Schnitt B-B nach Fig. 1, 3 is a schematic view of the device according to section B-B of FIG. 1,
Fig. 4 eine schematische Ansicht durch die Vorrichtung nach Schnitt C-C nach Fig. 1, 4 shows a schematic view through the device according to section C-C according to FIG. 1,
Fig. 5 einen Querschnitt durch ein isoliertes Rohrbündel, und Fig. 5 shows a cross section through an insulated tube bundle, and
Fig. 6 einen Querschnitt D-D nach Fig. 1. 6 shows a cross section D-D according to FIG. 1.
Mit der in der Fig. 1 dargestellten Vorrichtung werden Schaumstoffstreifen 2 aus einem thermoplastischen und verformbaren Material, die auf Vorratsrollen 1 aufgewickelt sind, zu Isolierhüllen verarbeitet. Der Streifen 2 läuft von der Vorratsrolle 1 über die Umlenkrolle 3 auf den Arbeitstisch 4, auf dem z.B. eine Schweissvorrichtung 5 vorgesehen ist. Diese Vorrichtung 5 wird benötigt zum endlosen Aneinanderfügen der Enden der Streifen 2 bei Rollenwechsel. Von dem Arbeitstisch 4 läuft der Streifen 2 durch das Führungsrollenpaar 6, wo er auf das endlose Band 8 abläuft. Das Band 8 übernimmt die Mitnehmerfunktion für den Streifen 2, zu diesem Zweck weist das Band 8 eine sehr rauhe Oberseite auf, z.B. wie bei Schmirgelband mit beliebiger Körnung. Dieses Band 8 weist eine gute mechanische Haftung zu dem Streifen 2 auf. Dies ist wichtig, da bei der nachfolgenden Wärmebehandlung der Streifen an mechanischer Festigkeit einbüsst und sonst die Gefahr bestünde, dass er nicht gleichmässig mittransportiert oder aber gereckt würde. Das endlose Band 8 wird mit dem Streifen 2 durch die verschiedenen Vorrichtungen geführt und wird am Ende der Andrückvorrichtung 20 umgelenkt und über die Spannrolle 17 wieder zu den Führungsrollen 6 zurückgeführt. Der Antrieb für das Band 8 erfolgt über die Antriebsrolle 22. With the device shown in FIG. 1, foam strips 2 made of a thermoplastic and deformable material, which are wound on supply rolls 1, are processed into insulating sleeves. The strip 2 runs from the supply roll 1 over the deflection roller 3 to the work table 4, on which e.g. a welding device 5 is provided. This device 5 is required for the endless joining of the ends of the strips 2 when changing rolls. The strip 2 runs from the work table 4 through the pair of guide rollers 6, where it runs onto the endless belt 8. The band 8 takes over the driving function for the strip 2, for this purpose the band 8 has a very rough upper side, e.g. as with emery belt with any grain. This band 8 has good mechanical adhesion to the strip 2. This is important because the strip loses mechanical strength during the subsequent heat treatment and there would otherwise be a risk that it would not be transported evenly or would be stretched. The endless belt 8 is guided with the strip 2 through the various devices and is deflected at the end of the pressing device 20 and returned to the guide rollers 6 via the tensioning roller 17. The belt 8 is driven by the drive roller 22.
Nachdem der Streifen auf dem Band 8 aufliegt und transportiert wird, durchläuft der Streifen die Heizvorrichtung 7, siehe auch schematischer Querschnitt nach Fig. 2. Die Heizvorrichtung kann mit Luft, Strahler usw. betrieben werden. Beim Durchlaufen wird der Streifen einseitig, d.h. auf seiner späteren Innenseite erwärmt und in den thermoplastischen Zustand versetzt, wobei die Erwärmung nur so weit über die Dicke des Querschnitts des Streifens vordringt, dass die Rückseite, die spätere Aussenseite, praktisch noch kalt und unpla-stifiziert bleibt und den mechanischen Transport und die Haftung auf dem Band 8 ermöglicht. Die Heiztemperatur und die Heizzeit richten sich nach den Eigenschaften des Schaumstoffes und der Dicke des Streifens. Hierbei ist insgesamt eine Pla-stifizierung, d.h. eine Erwärmung bis in den thermoelastischen oder Übergang in den thermoplastischen Zustand bis etwa zur Hälfte der Dicke des Streifens wünschenswert, wobei die Pla-stifizierung keinesfalls so weit gehen darf, dass die Schaumstoffstruktur zerstört wird. Diese Wärmebehandlung, die der Streifen beim Durchlaufen der Heizvorrichtung 7 erfährt, entspricht etwa einer Temperung. Das Transportband 8 läuft hierbei über die Arbeitsplatte 13. Der Heizraum ist durch die seitlichen Abschirmbleche 9 abgeschirmt, so dass auch ein gleichmässiges Erwärmen des Streifens in den Randbereichen sichergestellt ist. After the strip lies on the belt 8 and is transported, the strip passes through the heating device 7, see also the schematic cross section according to FIG. 2. The heating device can be operated with air, radiators, etc. When passing through the strip is one-sided, i.e. warmed up on its later inside and brought into the thermoplastic state, whereby the heating penetrates only so far beyond the thickness of the cross section of the strip that the back, the later outside, remains practically still cold and unplasticized and the mechanical transport and the liability on the tape 8 allows. The heating temperature and the heating time depend on the properties of the foam and the thickness of the strip. Here is a total of a placement, i.e. heating up to the thermoelastic or transition to the thermoplastic state up to about half the thickness of the strip is desirable, and the placement should not go so far as to destroy the foam structure. This heat treatment, which the strip undergoes when it passes through the heating device 7, corresponds approximately to an annealing. The conveyor belt 8 runs over the worktop 13. The heating space is shielded by the side shielding plates 9, so that even heating of the strip in the edge areas is ensured.
Der teilweise bis zur Plastifizierung erwärmte Streifen 2 wird nach Verlassen der Heizeinrichtung 7 der Einrichtung zum Umformen in den Isolierhüllenquerschnitt zugeführt. Hierbei läuft der Streifen 2 in den Formtrichter 10 ein, der ihn zu dem gewünschten Querschnitt umformt. An den Formtrichter 10 schliesst sich direkt die Formröhre 14 an, deren Innenkontur rund oder oval ist oder sonstwie weitestgehend dem gewünschten Querschnitt der Isolierhülle entsprechen kann. Dieser Querschnitt kann vorzugsweise der Rohr- oder Rohrbündelform angepasst sein. Die Formröhre ist jedoch oberseitig mindestens im Einlaufbereich und auch am Auslaufende mit dem Führungsschlitz 14a ausgebildet, wie auch aus dem schematischen Querschnitt nach Fig. 3 zu ersehen ist. In diesen Führungsschlitz 14a greift zumindest im Einlaufbereich die Führungsschiene 12 ein, die zugleich in die Stossnaht des zum Isolierhüllen-Vorformling 2a geformten Streifens eingreift und diese markiert, so dass ein Verdrehen des Vorformlings beim nachfolgenden Weitertransport vermieden ist. Die Formröhre The strip 2, which has been partially heated to the point of plasticization, is fed to the device for shaping into the cross-section of the insulating sleeve after leaving the heating device 7. Here, the strip 2 runs into the form funnel 10, which forms it into the desired cross section. The form tube 14 directly adjoins the form funnel 10, the inner contour of which is round or oval or otherwise can largely correspond to the desired cross section of the insulating sleeve. This cross section can preferably be adapted to the tube or tube bundle shape. However, the shaped tube is formed on the upper side at least in the inlet area and also at the outlet end with the guide slot 14a, as can also be seen from the schematic cross section according to FIG. 3. In this guide slot 14a, at least in the inlet area, the guide rail 12 engages, which at the same time engages and marks the butt seam of the strip formed into the insulating sheath preform 2a, so that twisting of the preform during subsequent transport is avoided. The shaped tube
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14 ist des weiteren mit der Kühleinrichtung 11 versehen, wobei vorzugsweise Kühlluft in die Formröhre 14 eingeblasen wird. Auf diese Weise ist sichergestellt, dass der Vorformling 2a beim Durchlaufen durch die Formröhre 14 wieder abgekühlt und etwas erstarrt. Auch das Band 18 wird in die Form-röhre 14 eingeführt und passt sich der Innenkontur der Form-röhre an, wodurch auch ein Druck des Vorformlings 2a auf das Transportband 8 ausgeübt wird, so dass trotz der Reibung in der Formröhre ein einwandfreier Transport stattfindet. Die Breite des Bandes 8 kann wesentlich kleiner als die Breite des Streifens 2 sein, beispielsweise ein Viertel bis ein Halb desselben betragen. Am Ende der Formröhre 14 können noch Führungsrollen 16 angeordnet sein, dies ist jedoch nicht unbedingt erforderlich und richtet sich nach der herzustellenden Isolierhülle. Jedoch ist es zweckmässig, auch im Auslaufbereich oberseitig eine Führungsschiene 15 vorzusehen, die in die Stossnaht 39 des Vorformlings 2a eingreift und ein Verdrehen desselben verhindert. Dies ist auch deshalb von Bedeutung, damit die Stossnaht des Vorformlings immer an derselben Stelle das Formrohr verlässt und in dieser Stellung der nachfolgenden Einrichtung zum Verschliessen der Stossformling 2a geschlossen wird, wird jetzt das Rohr 38 bzw. Rohre 38a, b, c von einer oder mehreren Vorratsrollen 37 abgezogen und von oberhalb kommend in einem spitzen Winkel zulaufend durch die offene Stossnaht in den Isolierhüllen-Vorformling 2a eingeführt. 14 is further provided with the cooling device 11, cooling air preferably being blown into the molded tube 14. In this way it is ensured that the preform 2a cools down again when it passes through the molding tube 14 and solidifies somewhat. The belt 18 is also inserted into the molding tube 14 and adapts to the inner contour of the molding tube, as a result of which a pressure of the preform 2a is also exerted on the conveyor belt 8, so that, despite the friction in the molding tube, proper transport takes place. The width of the band 8 can be substantially smaller than the width of the strip 2, for example a quarter to a half of the same. Guide rollers 16 can also be arranged at the end of the shaped tube 14, but this is not absolutely necessary and depends on the insulating sleeve to be produced. However, it is expedient to also provide a guide rail 15 on the upper side in the outlet area, which engages in the butt seam 39 of the preform 2a and prevents the same from twisting. This is also important so that the butt seam of the preform always leaves the molded pipe at the same point and is closed in this position of the subsequent device for closing the molded article 2a, the pipe 38 or pipes 38a, b, c is now one or pulled off a plurality of supply rolls 37 and introduced from above at an acute angle through the open butt seam into the insulating sleeve preform 2a.
Das von einer oder mehreren Vorratsrollen 37 kommende Rohr 38 bzw. Rohrbündel 38a, b, c wird zweckmässigerweise über Rollenführungen 40 oder auch anders gestaltete Führungen geleitet, um eine präzise Einleitung in den Isolierhüllen-vorformling und eine präzise Zuführung für die folgend beschriebene Verbindung, z.B. durch Schweissen der Isolierhüllenkanten zu gewährleisten. Hier nicht dargestellte Spreizen im Bereich der Einführung des Rohres oder der Rohre in den Iso-lierhüllenvorformling tragen ebenfalls zu einem störungsfreien präzisen Arbeitsablauf bei. The tube 38 or tube bundle 38a, b, c coming from one or more supply rollers 37 is expediently guided over roller guides 40 or other designed guides in order to ensure precise introduction into the insulating sleeve preform and a precise feed for the connection described below, e.g. by welding the edges of the insulating sleeve. Spreading, not shown here, in the area of the insertion of the tube or tubes into the insulating sleeve preform also contributes to a trouble-free, precise workflow.
Der noch offene Vorformling 2a wird nun verschlossen, wie beispielsweise durch Verschweissen der Stoffnaht, Verkleben der Stossnaht, gegebenenfalls auch Umhüllen mit einer Folie mit Kleberand, Aufschweissen eines Gleitverschlusses usw. In dem gezeigten Ausführungsbeispiel schliesst sich eine Schweissvorrichtung 19 zum Verschweissen der Stossnaht 39 des Vorformlings 2a an, wie auch aus dem Querschnitt nach Fig. 4 zu ersehen ist. Um ein einwandfreies Verschweissen der Stossnaht zu erhalten, wird der Vorformling 2a mit den Rohren 38 a, b zwischen einem oberen und unteren Niederhalteblech 18a, b geführt, die den Vorformling in einen etwa ovalen Querschnitt drücken, wobei die lange Achse waagrecht angeordnet ist. Die Stossnaht 39 liegt oberseitig, so dass das Heizschwert 19 in die Stossnaht eingreift und die Flächen plastifi-ziert, so dass sie verschweissen. Des weiteren sind seitliche einstellbare Führungsstützen 36 vorgesehen als Seitenbegrenzung. In dieser zusammengedrückten Querschnittsform wird die an der Stossnaht zugeschweisste Isolierhülle 2a direkt in die Andrückvorrichtung 20 eingeführt, die auf einer vorgegebenen Wegstrecke die Isolierhülle 2a in der vorgegebenen Stellung hält, bis die Schweissnaht verfestigt ist. Am Ende der Andrückvorrichtung wird das die Isolierhülle transportierende Band 8 abgezogen und zum Ausgang zurückgeführt, während mittels der Führungsrollen 23 der Weitertransport der Isolierhülle 2b mit den Rohren 38a, b zu einer nachfolgenden Heizeinrichtung 24 erfolgt. The still open preform 2a is now closed, for example by welding the fabric seam, gluing the butt seam, possibly also wrapping it with a film with adhesive edge, welding a slide fastener, etc. In the exemplary embodiment shown, a welding device 19 closes for welding the butt seam 39 of the preform 2a, as can also be seen from the cross section according to FIG. 4. In order to obtain a perfect welding of the butt seam, the preform 2a with the tubes 38a, b is guided between an upper and lower hold-down plate 18a, b, which press the preform into an approximately oval cross-section, the long axis being arranged horizontally. The butt seam 39 is on the top side, so that the heating element 19 engages in the butt seam and plastifies the surfaces so that they weld. Furthermore, lateral adjustable guide supports 36 are provided as a side limitation. In this compressed cross-sectional shape, the insulating sleeve 2a welded to the butt seam is inserted directly into the pressing device 20, which holds the insulating sleeve 2a in the predetermined position over a predetermined distance until the weld seam is solidified. At the end of the pressing device, the belt 8 transporting the insulating sleeve is pulled off and returned to the exit, while the insulating sleeve 2b with the pipes 38a, b is transported further to a subsequent heating device 24 by means of the guide rollers 23.
Die Andrückvorrichtung 20 kann auch zur Erfüllung der funktionellen Aufgaben in anderer Weise ausgebildet werden. In Fig. 6 ist der Querschnitt einer Andrückvorrichtung aufgezeigt. Profilierte Rollen 41 und gegebenenfalls glatte Rollen 42, die in axialer Richtung mehrfach hintereinander angeordnet sein können, fixieren und transportieren die Isolierhülle 2a während des Aushärtens der Stossnaht 39. Das Transportband 8 legt sich den Rollenquerschnitten entsprechend an die Isolierhülle, die sich wiederum teilweise am Rohr 38 abstützt. The pressing device 20 can also be designed in a different way to fulfill the functional tasks. 6 shows the cross section of a pressing device. Profiled rollers 41 and optionally smooth rollers 42, which can be arranged several times in succession in the axial direction, fix and transport the insulating sleeve 2a while the butt seam 39 is curing 38 supports.
Eine Andrückvorrichtung, die gleichzeitig Transportband 8, Rohr oder Rohrbündel 38 bzw. 38a, b, c und Isolierhülle 2a während des Aushärtens der Verbindungsnaht transportiert, kann jedoch auch in unterschiedlich anderer Weise gestaltet sein. A pressing device, which simultaneously transports the conveyor belt 8, tube or tube bundle 38 or 38a, b, c and insulating sleeve 2a during the hardening of the connecting seam, can also be designed in different ways.
Die Rollen 23, die der Andrückvorrichtung 20 nachgeordnet sein können, übernehmen die Aufgabe der Rohrführung. Dann folgt gegebenenfalls die zweite Heizvorrichtung 24, die die Aussentemperung der Isolierhülle 2b durchführt. Beim Durchlaufen der Heizvorrichtung 24 wird die Isolierhülle an ihrer Aussenfläche bis zum Plastifizieren der äusseren Haut erwärmt, jedoch nur kurzzeitig, so dass die Schaumstoffstruk-tur erhalten bleibt. Durch diese Wärmebehandlung werden die letzten in der Isolierhülle in deren Aussenschicht verbliebenen Spannungen ausgetempert, so dass keine Spannungen zurückbleiben, die diese zum ebenen Streifen zurückstellen wollen. Dieser Tempervorgang führt ebenfalls zum Abbau der Längsspannungen und trägt somit ebenfalls dazu bei, dass das Rohr bzw. Rohrbündel gleich lang mit der Isolierhülle ist. Beim späteren Ablängen eines Rohrabschnittes tritt dann praktisch kein Schrumpf der Isolierhülle gegenüber dem isolierten Rohr oder Rohrbündel auf. Nach dem Verlassen der Heizvorrichtung wird die Isolierhülle mit den Rohren wieder abgekühlt, wobei .sie beispielsweise durch das Kühlrohr 27 geführt wird. Das Kühlrohr 27 kann beispielsweise mittels Kühlluft betrieben werden, die über den Eingang 26 zugeführt wird. Vor dem Kühlrohr 27 ist zweckmässig eine Blende 25 angeordnet, die ein einwandfreies Zuführen der Kühlluft sicherstellt. Das Kühlrohr 27 kann auswechselbar sein und in seiner Innenform den jeweiligen herzustellenden Isolierhüllen angepasst werden. Der weitere Abtransport geschieht über die Abzugsrollen 29. Bei biegsamen isolierten Rohren kann dann anschliessend das isolierte Rohr bzw. Rohrbündel z.B. auf eine Vorratsrolle aufgewickelt werden. Bei starren isolierten Rohren erfolgt dann eine Ablängung. The rollers 23, which can be arranged downstream of the pressing device 20, assume the task of pipe routing. Then there follows the second heating device 24, if necessary, which carries out the external annealing of the insulating sleeve 2b. When passing through the heating device 24, the insulating sleeve is heated on its outer surface until the outer skin is plasticized, but only briefly, so that the foam structure is retained. As a result of this heat treatment, the last tensions remaining in the insulating layer in the outer layer are tempered out, so that no tensions remain that would like to return them to the flat strip. This tempering process also leads to the reduction of the longitudinal stresses and thus also contributes to the tube or tube bundle being of the same length with the insulating sleeve. When a pipe section is cut to length later, there is practically no shrinkage of the insulating sleeve compared to the insulated pipe or tube bundle. After leaving the heating device, the insulating sleeve with the tubes is cooled again, whereby it is guided through the cooling tube 27, for example. The cooling tube 27 can be operated, for example, by means of cooling air which is supplied via the inlet 26. In front of the cooling tube 27, an aperture 25 is expediently arranged, which ensures a correct supply of the cooling air. The cooling tube 27 can be exchangeable and its inner shape can be adapted to the respective insulating sleeves to be produced. Further removal takes place via the take-off rollers 29. With flexible insulated pipes, the insulated pipe or tube bundle can then be e.g. be wound up on a supply roll. In the case of rigid insulated pipes, they are cut to length.
Mit dem erfindungsgemässen Verfahren ist auf der beschriebenen Vorrichtung eine spannungsfreie und formschlüssige Isolierung aus Schaumstoffstreifen von Rohren herstellbar. With the method according to the invention, tension-free and positive insulation can be produced from foam strips of pipes on the device described.
Mit dem erfindungsgemässen Verfahren können in einem Arbeitszug isolierte Rohre oder Rohrbündel hergestellt werden, bei denen also die nachträgliche Montage oder das nachträgliche Aufbringen der Isolierhülle auf die Rohre bzw. Rohrbündel entfällt. With the method according to the invention, insulated tubes or tube bundles can be produced in one work cycle, in which case the subsequent assembly or the subsequent application of the insulating sleeve to the tubes or tube bundles is eliminated.
Will man anstelle biegsamer Rohre starre Rohre, z.B. Kupferrohre, isolieren, so ist es zweckmässig, diese Rohre in einer Ebene zu transportieren, während die elastische und verformbare Isolierhülle unter einem spitzen Winkel dem geradeaus geführten Rohr zugeführt wird. Hierbei ist es auch möglich, direkt aus einem Fertigungsprozess kommende Rohre, z.B. vom Extruder kommende extrudierte Kunststoffrohre, mit einer Isolierhülle nach dem erfindungsgemässen Verfahren zu versehen. If you want rigid pipes instead of flexible pipes, e.g. Insulate copper pipes, so it is useful to transport these pipes in one plane, while the elastic and deformable insulating sleeve is fed at an acute angle to the straight pipe. It is also possible to use pipes directly from a manufacturing process, e.g. extruded plastic pipes coming from the extruder to be provided with an insulating sleeve according to the inventive method.
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2 Blatt Zeichnungen 2 sheets of drawings
Claims (8)
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2654879A DE2654879C2 (en) | 1976-12-03 | 1976-12-03 | Process for the continuous production of a pipe provided with an insulating sleeve made of foam plastic |
Publications (1)
Publication Number | Publication Date |
---|---|
CH625997A5 true CH625997A5 (en) | 1981-10-30 |
Family
ID=5994632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
CH1478277A CH625997A5 (en) | 1976-12-03 | 1977-12-02 | Process for producing pipes provided with an insulating sleeve of foam plastic |
Country Status (11)
Country | Link |
---|---|
JP (1) | JPS53102387A (en) |
AT (1) | AT364530B (en) |
BE (1) | BE861390A (en) |
CA (1) | CA1086038A (en) |
CH (1) | CH625997A5 (en) |
DE (1) | DE2654879C2 (en) |
DK (1) | DK150237C (en) |
FR (1) | FR2372690A1 (en) |
GB (1) | GB1543687A (en) |
NL (1) | NL7713384A (en) |
SE (1) | SE7713633L (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
IT1071401B (en) * | 1980-04-24 | 1985-04-10 | Zema S R L | PROCEDURE FOR THE COVERING OF METAL TUBES WITH CLOSURE AND PLASTIC FILM, MACHINE TO IMPLEMENT THE PROCEDURE AND PRODUCT OBTAINED |
DE3235635C2 (en) * | 1982-09-25 | 1985-02-21 | Dynamit Nobel Ag, 5210 Troisdorf | Method and device for the continuous production of thick-walled multilayer insulating pipes from thermoplastic foam strips |
DE3318082A1 (en) * | 1983-05-18 | 1984-11-22 | Dynamit Nobel Ag, 5210 Troisdorf | METHOD AND DEVICE FOR PRODUCING A TUBE PROVIDED WITH AN INSULATING COVER FROM FOAM |
DE3338071A1 (en) * | 1983-10-20 | 1985-05-09 | Felten & Guilleaume Energietechnik GmbH, 5000 Köln | Process for the continuous production of flexible, thermally insulated pipelines |
FR2664850A1 (en) * | 1990-07-17 | 1992-01-24 | Caure Michel | Method of sheathing a bundle of filiform elements, device for implementing it and bundle obtained |
ES2121661B1 (en) * | 1995-04-07 | 1999-06-01 | Hispano Portuguesa De Bobinado | MANUFACTURING PROCESS OF DEMAGNETIZING COILS. |
FR2800665B1 (en) * | 1999-11-05 | 2002-08-30 | Alphacan Sa | METHOD FOR SURROUNDING AN ELEMENT WITH A FOAM LAYER, FOAM ENVELOPE, TUBULAR COMPLEX WITH THE SAME, AND CROWN THEREOF |
FR2800664A1 (en) * | 1999-11-05 | 2001-05-11 | Alphacan Sa | Economical, installer-friendly sheathing of copper pipes with insulating foam is carried out by continuous longitudinal wrapping and edge-adhesion under slight pressure |
DE102012112280B4 (en) * | 2012-12-14 | 2014-11-20 | Henco Industries N.V. | Method for producing an insulating composite pipe |
DE102016115968B4 (en) | 2016-08-26 | 2021-02-04 | Henco Industries N.V. | Method for producing a strip for an insulating pipe of an insulating composite pipe and such an insulating composite pipe |
CN110625918A (en) * | 2018-06-21 | 2019-12-31 | 江苏沃杰高分子材料有限公司 | Novel expanding machine |
KR102112197B1 (en) * | 2019-10-08 | 2020-05-19 | (주)동인엔지니어링 | Low temperature pipe insulation apparatus |
Family Cites Families (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US2960725A (en) * | 1957-03-21 | 1960-11-22 | Dow Chemical Co | Process for preparing thermoplastic tapes of varied cross-sections |
US2971538A (en) * | 1958-01-31 | 1961-02-14 | Moore & Co Samuel | Extruded tubing |
ES332098A1 (en) * | 1965-10-11 | 1967-11-16 | Ab Svenska Metallverken | A method of continuous insulation of pipe or canalization sections. (Machine-translation by Google Translate, not legally binding) |
DE1915768C3 (en) * | 1968-03-27 | 1974-02-07 | The Furukawa Electric Co., Ltd., Tokio | A method and apparatus for continuously manufacturing a tubular article from a sheet of foamed thermoplastic resin |
GB1277038A (en) * | 1969-07-09 | 1972-06-07 | Vladimirsky Nii Sint Smol | A method of manufacturing shaped articles from elastic porous materials |
FR2225681B1 (en) * | 1973-04-13 | 1976-05-21 | Pont A Mousson | |
FR2346138A1 (en) * | 1976-03-31 | 1977-10-28 | Tetra Pak Dev | METHOD AND DEVICE FOR THE MANUFACTURING OF PACKAGING CONTAINERS |
-
1976
- 1976-12-03 DE DE2654879A patent/DE2654879C2/en not_active Expired
-
1977
- 1977-11-28 GB GB4944977A patent/GB1543687A/en not_active Expired
- 1977-11-30 FR FR7736125A patent/FR2372690A1/en active Granted
- 1977-12-01 AT AT860677A patent/AT364530B/en not_active IP Right Cessation
- 1977-12-01 SE SE7713633A patent/SE7713633L/en not_active Application Discontinuation
- 1977-12-01 BE BE183082A patent/BE861390A/en not_active IP Right Cessation
- 1977-12-02 CA CA292,236A patent/CA1086038A/en not_active Expired
- 1977-12-02 JP JP14492777A patent/JPS53102387A/en active Pending
- 1977-12-02 CH CH1478277A patent/CH625997A5/en not_active IP Right Cessation
- 1977-12-02 DK DK539377A patent/DK150237C/en not_active IP Right Cessation
- 1977-12-02 NL NL7713384A patent/NL7713384A/en not_active Application Discontinuation
Also Published As
Publication number | Publication date |
---|---|
FR2372690B1 (en) | 1984-01-27 |
DK539377A (en) | 1978-06-04 |
DK150237C (en) | 1987-10-26 |
DK150237B (en) | 1987-01-19 |
DE2654879C2 (en) | 1982-11-11 |
JPS53102387A (en) | 1978-09-06 |
ATA860677A (en) | 1981-03-15 |
DE2654879A1 (en) | 1978-06-08 |
AT364530B (en) | 1981-10-27 |
FR2372690A1 (en) | 1978-06-30 |
CA1086038A (en) | 1980-09-23 |
BE861390A (en) | 1978-03-31 |
SE7713633L (en) | 1978-06-04 |
GB1543687A (en) | 1979-04-04 |
NL7713384A (en) | 1978-06-06 |
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Legal Events
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PL | Patent ceased |