DK150237B - PROCEDURE FOR CONTINUOUS PREPARATION OF A PIPE OR PIPE BASED WITH A FOAM SHOULDER INSULATOR - Google Patents
PROCEDURE FOR CONTINUOUS PREPARATION OF A PIPE OR PIPE BASED WITH A FOAM SHOULDER INSULATOR Download PDFInfo
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- DK150237B DK150237B DK539377AA DK539377A DK150237B DK 150237 B DK150237 B DK 150237B DK 539377A A DK539377A A DK 539377AA DK 539377 A DK539377 A DK 539377A DK 150237 B DK150237 B DK 150237B
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- pipe
- strip
- foam
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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
-
- 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
-
- 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
-
- 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
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Manufacturing & Machinery (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
- Thermal Insulation (AREA)
- Shaping Of Tube Ends By Bending Or Straightening (AREA)
Description
150237 i150237 i
Opfindelsen angår en fremgangsmåde til kontinuerlig fremstilling af et rør eller rørbundt med en isolationskappe af termoplastisk skumformstof, hvilken fremgangsmåde er af den nærmere i kravets indledning angivne art.BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for the continuous manufacture of a tube or tube bundle with a thermoplastic foam molding insulation sheath which is of the kind specified in the preamble of claim.
5 Det er kendt, jævnfør f.eks. DE-offentliggørelsesskrift nr. 1.915.768, at fremstille rør af skumformstofstrimler ved de-formering af en kold skumstofstrimmel, hvor alene de langsgående kanter opvarmes til svejsetemperatur, så at disse kan sammensvejses. Denne opvarmning af de til sammensvejsning be-10 stemte kanter foretages først efter at strimlen i kold tilstand er blevet ombukket til rørform.5 It is known, cf. DE Publication No. 1,915,768, to produce tubes of foam molding strips by deforming a cold foam fabric strip, wherein only the longitudinal edges are heated to welding temperature so that they can be welded together. This heating of the edges intended for welding is done only after the strip in cold condition has been folded into tubular form.
Denne kendte teknik kan derfor kun anvendes ved strimler med en begrænset tykkelse i forhold til rørtværsnittet og i forhold til det pågældende skumstofs elasticitet. Ved den såle-15 des kendte teknik kan der således kun fremstilles isolationslag af en meget ringe tykkelse, idet der i strimlen ved deformationen opstår spændinger, der søger at presse strimlen tilbage fra den ombukkede tilstand, når ombukningen som ved denne kendte teknik foretages uden forudgående opvarmning 20 af selve skumstofstrimlen.Therefore, this prior art can only be used for strips of a limited thickness in relation to the pipe cross-section and in relation to the elasticity of the foam material in question. Thus, in the known technique of the insulation, only insulating layers of very low thickness can be produced, in which the stress of the deformation creates stresses which seek to push the strip back from the folded state when the folding as in this known technique is done without prior heating the foam strip itself.
Det er på denne baggrund opfindelsens formål at anvise en fremgangsmåde af den indledningsvis nævnte art, hvor det under undgåelse af de nævnte spændinger er muligt at fremstille rør eller rørbundter med isolationskapper af en be-25 tydeligt større tykkelse end hidtil, og dette formål opnås ved en fremgangsmåde, som ifølge opfindelsen er ejendommelig ved de i kravets kendetegnende del angivne trin. Den kortvarige opvarmning af strimlen på den angivne måde bevirker, at strimlen kan deformeres på tværs af sin længde-30 retning, uden at der opstår blivende indre spændinger af betydning.Accordingly, it is the object of the invention to provide a method of the kind mentioned in the first, wherein, in order to avoid said stresses, it is possible to produce tubes or tubes with insulating sheaths of a considerably greater thickness than heretofore, and this object is achieved by a method which according to the invention is characterized by the steps specified in the characterizing part of the claim. The short-term heating of the strip in the manner indicated allows the strip to be deformed across its longitudinal direction without creating any significant internal stresses.
Opfindelsen skal i det følgende forklares nærmere under henvisning til det på tegningen illustrerede udførelseseksempel på fremgangsmåden ifølge opfindelsen, idet 2 150237 fig. 1 skematisk viser fremgangsmådens forløb på et apparat til fremstilling af med skumstofstrimler isolerede rør, fig. 2 et skematisk tværsnit gennem apparatet efter linien 5 A-A i fig. 1, fig. 3 et skematisk billede af apparatet efter snit B-B ffølge fig. 1, fig. 4 et skematisk billede gennem apparatet efter snit C-C ifølge fig. 1, 10 fig. 5 et tværsnit gennem et isoleret rørbundt og fig. 6 et tværsnit D-D ifølge fig. 1.BRIEF DESCRIPTION OF THE DRAWINGS The invention will be explained in more detail below with reference to the exemplary embodiment of the method according to the invention illustrated in the drawing. 1 schematically shows the process of the process on an apparatus for making foam insulated tubes; FIG. 2 is a schematic cross section through the apparatus along line 5A-A in FIG. 1, FIG. 3 is a schematic view of the apparatus according to section B-B according to FIG. 1, FIG. 4 is a schematic view through the apparatus of section C-C of FIG. 1, 10 FIG. 5 is a cross-section through an insulated tube bundle; and FIG. 6 is a cross section D-D of FIG. First
Ved hjælp af det i fig. 1 viste apparat forarbejdes en skumstof strimmel 2 af et termoplastisk og deformerbart materiale, der er rullet op på en forrådsrulle 1, til en isolationskap-15 pe. Strimlen 2 løber fra forrådsrullen 1 via en afbøjningsrulle 3 ned på et arbejdsbord 4, på hvilket f.eks. findes et svejseapparat 5. Dette apparat 5 behøves til sammenføjning af en endeløs strimmel 2 ved bytning af rulle. Fra arbejdsbordet 4 løber strimlen 2 til et par styreruller 6, 20 hvor den kommer ind på et endeløst bånd 8. Båndet 8 overtager medbringerfunktionen for strimlen 2, og til dette formål har Båndet 8 en særdeles ru overside, f.eks. som ved smergelbånd med vilkårlig kornstørrelse. Båndet 8 har en god mekanisk adhæsion til strimlen 2. Dette er vigtigt, da strimlen ved 25 den efterfølgende varmebehandling mister mekanisk styrke, og der ellers ville være fare for, at den ikke ville blive medtransporteret ensartet eller ville blive strakt. Det endeløse bånd 8 føres med strimlen 2 gennem forskellige apparater, afbøjes ved enden af en tilpresningsmekanisme 30 20 og føres tilbage til styrerullerne 6 igen via en spænd- rulle 17. Båndet 8 drives ved hjælp af en drivrulle 22.By means of the device shown in FIG. 1, a foam strip 2 of a thermoplastic and deformable material rolled up on a supply roll 1 is processed into an insulating cap. The strip 2 runs from the stock roll 1 via a deflection roll 3 onto a work table 4, on which e.g. there is a welding apparatus 5. This apparatus 5 is needed for joining an endless strip 2 when changing rollers. From the workbench 4, the strip 2 runs to a pair of guide rollers 6, 20 where it enters an endless band 8. The band 8 assumes the carrying function of the strip 2, and for this purpose the band 8 has a very rough upper surface, e.g. as with arbitrary grain size arbitrary. The strip 8 has a good mechanical adhesion to the strip 2. This is important as the strip at the subsequent heat treatment loses mechanical strength and otherwise there would be a danger that it would not be co-transported uniformly or would be stretched. The endless belt 8 is passed through the strip 2 through various apparatus, deflected at the end of a pressing mechanism 30 20 and returned to the guide rollers 6 again via a tension roller 17. The belt 8 is driven by a drive roller 22.
Når strimlen 2 ligger på og transporteres af båndet 8, passerer den et opvarmningsorgan 7, se også det skematiske tværsnit ifølge fig. 2. Opvarmningsorganét kan arbejde 35 med luft eller stråler. Ved gennemløbet opvarmes strimlen på den ene side, nemlig på dens senere inderside, 150237 3 og bringes herved lokalt i den termoplastiske tilstand; opvarmningen i strimlens tværsnitstykkelse må kun trænge så langt ind, at bagsiden, den senere yderside, forbliver praktisk taget kold og uplastificeret og muliggør den mekaniske 5 transport og adhæsion på båndet 8. Opvarmningstemperaturen og opvarmningstiden retter sig efter skumstoffets egenskaber og strimlens tykkelse. Det er ønskeligt med en plastificering, dvs. en opvarmning, indtil den termoplastiske tilstand henholdsvis overgang i den termoelastiske tilstand, der går 10 ind til ca. midten af strimlens tykkelse, idet plastifice-ringen i intet tilfælde dog må gå så vidt, at skumstofstrukturen ødelægges. Den varmebehandling eller temperering, strimlen får ved gennemløbet af opvarmningsorganet 7, svarer omtrent til den fra metalbehandling kendte udglød-15 ning. Transportbåndet 8 løber derved over en arbejdsplade 13. Opvarmningsrummet er afskærmet ved hjælp af sideafskærmningsplader 9, således at der også i kantområderne sikres en ensartet opvarmning af strimlen 2.As the strip 2 is mounted and transported by the belt 8, it passes a heating means 7, see also the schematic cross-section according to FIG. 2. The heater can work 35 with air or rays. Upon passage, the strip is heated on one side, namely on its later inside, and thereby brought locally into the thermoplastic state; the heating in the cross-sectional thickness of the strip may only penetrate so far that the back, the later outside, remains practically cold and unplasticized, enabling the mechanical transport and adhesion on the belt 8. The heating temperature and the heating time depend on the properties of the foam and the thickness of the strip. A plasticization is desirable, i.e. heating until the thermoplastic state or transition into the thermoelastic state, which enters 10 to approx. the middle of the strip thickness, the plastic ring being in no case allowed to go so far as to destroy the foam structure. The heat treatment or tempering obtained by the strip at the passage of the heating means 7 is approximately similar to the annealing known from metal treatment. Consequently, the conveyor belt 8 runs over a work plate 13. The heating compartment is shielded by means of side shield plates 9, so that even in the edge regions a uniform heating of the strip 2 is ensured.
Den delvist indtil plastificering opvarmede strimmel 2 føres, 20 efter at den har forladt opvarmnings organet 7, til et apparat, der omformer strimlen, således at tværsnittet svarer til isolationskappens. Dertil løber strimlen 2 ind i en formtragt 10, der omformer den til det ønskede tværsnit.The strip 2, which is partially heated until plastic, is fed, 20 after leaving the heating element 7, to an apparatus which reshapes the strip so that the cross-section corresponds to that of the insulating jacket. In addition, the strip 2 runs into a mold funnel 10 which transforms it to the desired cross-section.
Til formtragten 10 er direkte forbundet et formrør 14, hvis 25 inderkontur kan være rund, oval eller andet, der i videst muligt omfang svarer til det ønskede tværsnit af isolationskappen. Dette tværsnit er fortrinsvis tilpasset efter røreller rørbundtformen. Formrøret er dog foroven i det mindste i indløbsområdet og også ved udløbsenden udformet med en 30 styreslids 14a, som det også ses af det skematiske tværsnit ifølge fig. 3. I denne styreslids 14a indgriber i det mindste i indløbsområdet en styreskinne 12, der samtidig griber ind i stødsamlingen af den til isolationskappe-emnet 2a formede strimmel og markerer denne, således at man undgår vrid-35 ning af emnet under den efterfølgende videretransport. Formrøret 14 er desuden forsynet med et køleorgan 11, idet 4 150237 der fortrinsvis indblæses køleluft i formrøret 14. På denne måde sikres, at emnet 2a ved gennemløbet gennem formrøret 14 igen afkøles og stivner noget. Også båndet 8 indføres i formrøret 14 og tilpasser sig efter formrørets inderkontur, så-5 ledes at der også udøves tryk af transportbåndet 8 på emnet 2a, og trods gnidningen i formrøret finder en fejlfri transport sted. Båndet 8's bredde kan være væsentligt mindre end bredden af strimlen 2, f.eks. en fjerdedel til halvdelen af denne bredde. Ved enden af formrøret 14 kan være anbragt 10 yderligere styreruller 16, men dette er dog ikke ubetinget nødvendigt og afhænger af isolationskappen, der skal fremstilles. Det er dog hensigtsmæssigt også foroven i udløbsområdet at anbringe en styreskinne 15, der griber ind i emnet 2a's stødsamling 39 og forhindrer vridning af dette. Dette 15 er også af betydning for at emnets stødsamling altid forlader formrøret ved det samme sted, og i denne stilling kommer til det efterfølgende.apparat til lukning af emnet 2a.To the mold hopper 10 is directly connected a mold tube 14, the inner contour of which can be round, oval or other, which corresponds as far as possible to the desired cross-section of the insulating jacket. This cross-section is preferably adapted to the tube or tube bundle shape. However, the mold tube is at least at the top in the inlet region and also at the outlet end formed with a 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 region, a guide rail 12, which simultaneously engages the shock assembly of the strip formed for the insulating jacket blank 2a and engages it so as to avoid twisting of the blank during the subsequent forward transport. The mold tube 14 is furthermore provided with a cooling means 11, preferably cooling air is blown into the mold tube 14. In this way, the workpiece 2a is again cooled and solidified as it passes through the mold tube 14. The belt 8 is also inserted into the mold tube 14 and adapts to the inner contour of the mold tube, so that pressure is also exerted by the conveyor belt 8 on the blank 2a, and despite the rubbing in the mold tube, a faultless transport takes place. The width of the strip 8 may be substantially smaller than the width of the strip 2, e.g. one-fourth to one-half of this width. At the end of the mold tube 14 additional guide rollers 16 may be arranged, but this is not necessarily necessary and depends on the insulating jacket to be manufactured. However, it is also convenient to place at the top of the outlet area a guide rail 15 which engages the impact assembly 39 of the blank 2a and prevents twisting thereof. This 15 is also important for the impact assembly of the workpiece to always leave the mold tube at the same location, and in this position comes to the subsequent apparatus for closing the workpiece 2a.
Et rør 38 eller flere rør 38a, b og c tages derefter fra en eller flere forrådsruller 37 og indføres fra oven i en 20 spids vinkel, gennem den åbne stødsamling ind i isolations-kappe-emnet 2a.A tube 38 or more tubes 38a, b and c are then taken from one or more supply rollers 37 and inserted from above at a 20-point angle, through the open bump assembly into the insulating jacket blank 2a.
Det fra en eller flere forrådsruller 37 kommende rør 38 henholdsvis rørbundt 38a, b og c ledes hensigtsmæssigt over rullestyr 40 eller på anden måde udformede styr for tilveje-25 bringelse af en præcis indføring i isolationskappe-emnet og en præcis tilførsel til den nedenfor beskrevne lukning, f.eks. ved svejsning af isolationskappekanten. På tegningen ikke viste spredeorganer ved rørets eller rørenes tilførselsområde i isolationskappe-emnet bidrager ligeledes til et 30 forstyrrelsesfrit, præcist arbejdsforløb.The tube 38 coming from one or more supply rollers 37 or tube bundles 38a, b and c, respectively, is conveniently guided over roll guide 40 or otherwise configured guide to provide a precise insertion into the insulating jacket blank and a precise feed to the closure described below. , eg. by welding the insulation jacket edge. The scattering means not shown in the drawing at the supply area of the pipe or tubes in the insulating sheath blank also contribute to a disturbance-free, precise operation.
Det endnu åbne emne 2a lukkes derefter, f.eks. ved svejsning eller klæbning af stødsamlingen, eventuelt også ved omsvøb-ning med en folie med klæbekant eller påsvejsning af et glidelukke. I det viste udførelseseksempel anvendes et 35 svejseapparat 19 til sammensvejsning af emnet 2a's stød- 150237 5 samling 39, som det også kan ses af tværsnittet ifølge fig. 4. For at opnå en fejlfri sammensvejsning af stødsamlingen føres emnet 2a med rørene 38a, b mellem en øvre og nedre fladklemningsplade 18a, b, der trykker emmet til et 5 omtrent ovalt tværsnit, således at storaksen er vandret. Stødsamlingen 39 ligger foroven, således at opvarmningssværdet 19 griber ind i stødsamlingen og plastificerer fladerne til sammensvejsning. Endvidere findes på siderne indstillelige styrestøtter 36 som sidebegrænsning. I denne 10 sammentrykte tværsnitsform indføres den i stødsamlingen tilsvejsede isolationskappe 2b direkte i en holdetryksmekanisme, som på en forud givet strækning holder isolationskappen 2b i den forud givne stilling, indtil svejsesamlingen er blevet fast. Ved enden af tilpresningsmekanis-15 men 20 bortledes derefter båndet 8, der transporterer isolationskappen 2b, og føres tilbage til indgangen, medens videretransporten af isolationskappen 2b med rørene 38a, b til et efterfølgende opvarmningsorgan 24 sker ved hjælp af styreruller 23.The still open item 2a is then closed, e.g. by welding or bonding the shock assembly, possibly also by wrapping with a foil with adhesive edge or welding a slide closure. In the illustrated embodiment, a welding apparatus 19 is used to weld the blank 2a of the butt joint 39, as can also be seen in the cross section of FIG. 4. In order to obtain a flawless welding of the butt joint, the blank 2a is passed with the pipes 38a, b between an upper and lower flat clamping plate 18a, b which presses the blank to a roughly oval cross-section so that the major axis is horizontal. The shock assembly 39 is at the top so that the heating sword 19 engages the shock assembly and plasticizes the surfaces for welding. Furthermore, adjustable guide supports 36 are available on the sides as a side restriction. In this compressed cross-sectional form, the insulating sheath 2b welded to the butt joint is inserted directly into a holding pressure mechanism which, at a predetermined distance, holds the insulating sheath 2b in the predetermined position until the weld joint has become fixed. At the end of the pressing mechanism 15, the strip 8 conveying the insulating sheath 2b is then discharged and returned to the entrance, while the further transport of the insulating sheath 2b with the pipes 38a, b to a subsequent heating means 24 is effected by guide rollers 23.
20 Tilpresningsmekanismen 20 kan til opfyldelse af funktionelle opgaver også være udformet på en anden måde. I fig. 6 er vist tværsnittet af en tilpresningsmekanisme. Profilerede ruller 41 og eventuelt glatte ruller 42, der i aksial retning kan være anbragt flere gange efter hinanden, fikse-25 rer og transporterer isolationskappen 2a under hærdningen af stødsamlingen 39. Transportbåndet 8 antager form efter rulletværsnittet svarende til isolationskappen, der igen til dels støtter røret 38.The pressing mechanism 20 may also be designed in a different way to fulfill functional tasks. In FIG. 6 is a cross-sectional view of a pressing mechanism. Profiled rollers 41 and optionally smooth rollers 42, which may be arranged in axial direction several times in succession, fix and transport the insulating sheath 2a during the curing of the butt joint 39. The conveyor belt 8 takes shape after the rolling cross section corresponding to the insulating sheath which in part supports the tube 38.
En tilpresningsmekanisme, der samtidig transporterer trans-30 portbånd 8, rør eller rørbundt 38 henholdsvis 38a, b, c og isolationskappe 2a under hærdningen af forbindelsessamlingen, kan dog også være udformet på forskellige andre måder.However, a pressing mechanism simultaneously conveying conveyor belts 8, tubes or tubular bundles 38 and 38a, b, c and insulating sheath 2a during the curing of the connector assembly may also be designed in various other ways.
Rullerne 23, der kan være anbragt efter tilpresningsmekanismen 20, overtager rørstyrets opgave. Derefter følger eventu-35 elt et andet opvarmningsorgan 24, der udfører isola- 150237 6 tionskappen 2b's ydertemperering. Ved gennemløb af opvarmningsorganet 24 opvarmes isolationskappen på dens yderflader indtil plastificering af den ydre hud, men kun kortvarigt, således at skumstofstrukturen bibeholdes.The rollers 23, which may be arranged according to the pressing mechanism 20, take over the task of the pipe guide. Then, optionally, another heating means 24 which performs the outer tempering of the insulating sheath 2b follows. Upon passage of the heating means 24, the insulating jacket is heated on its outer surfaces until plasticizing the outer skin, but only briefly, so that the foam structure is maintained.
5 Gennem denne varmebehandling udtempereres de sidste i isolationskappens yderlag tilbageblevne spændinger, således at der ikke bliver nogen spændinger tilbage, der har tilbøjelighed til at føre kappen tilbage til plane strimler.5 Through this heat treatment, the last remaining stresses in the outer layer of the insulating jacket are tempered, so that no stresses remain which tend to return the jacket to planar strips.
Dette tempereringstrin fører ligeledes til nedbrydning af 10 de langsgående spændinger og bidrager således ligeledes til, at isolationskappen er lige så lang som røret eller rørbundtet. Ved senere afkortning af et rørafsnit indtræder der derved praktisk taget ingen krympning af isolationskappen i forhold til det isolerede rør eller rør-15 bundt. Efter passage af opvarmningsorganet afkøles isolationskappen med rørene igen, idet den eksempelvis føres gennem et kølerør 27. Kølerøret 27 kan eksempelvis drives ved hjælp af køleluft, der tilføres via indgangen 26. Foran kølerøret 27 findes hensigtsmæssigt en ringskærm 25, der 20 sikrer en fejlfri tilførsel af køleluft. Kølerøret 27 kan være udskifteligt og i dets inderform være tilpasset efter den pågældende isolationskappe, der skal fremstilles. Den videre borttransport sker via afgangsruller 29. Ved bøjelige, isolerede rør kan det isolerede rør henholdsvis rør-25 bundt derefter rulles op på f.eks. en forrådsrulle. Ved stive, isolerede rør sker der derimod derefter en afskæring.This tempering step also leads to the breakdown of the longitudinal stresses and thus also contributes to the insulating sheath being as long as the pipe or pipe bundle. Upon subsequent truncation of a pipe section, there is thus virtually no shrinkage of the insulating jacket relative to the insulated pipe or pipe bundle. After passage of the heating means, the insulating jacket is cooled with the pipes again, for example, it is passed through a cooling pipe 27. The cooling pipe 27 can, for example, be driven by cooling air supplied via the inlet 26. In front of the cooling pipe 27, there is suitably a ring shield 25 which ensures a faultless supply. of cooling air. The cooling pipe 27 may be interchangeable and in its inner form adapted to the particular insulating jacket to be manufactured. The further away transport is via exit rollers 29. For flexible insulated pipes, the insulated pipe or pipe-25 can then be rolled up on e.g. a supply roll. In the case of rigid, insulated pipes, on the other hand, a cut-off occurs.
Ved hjælp af den omhandlede fremgangsmåde kan man på det beskrevne apparat fremstille en spændingsfri og formlukket isolering af en skumstofstrimmel på rør. 1By means of the method according to the invention, a voltage-free and mold-closed insulation of a foam strip on pipes can be produced on the described apparatus. 1
Ved hjælp af den omhandlede fremgangsmåde fremstilles isolerede rør eller rørbundter i én arbejdslinie, således at.By the method of the present invention, insulated tubes or tubes are produced in one line of work such that:
' den efterfølgende montage eller efterfølgende påføring af isolationskappe på rørene hénholdsvis rørbundterne bortfalder .the subsequent mounting or subsequent application of insulating jacket to the pipes, respectively, the pipe bundles will lapse.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE2654879 | 1976-12-03 | ||
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 (3)
Publication Number | Publication Date |
---|---|
DK539377A DK539377A (en) | 1978-06-04 |
DK150237B true DK150237B (en) | 1987-01-19 |
DK150237C DK150237C (en) | 1987-10-26 |
Family
ID=5994632
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
DK539377A DK150237C (en) | 1976-12-03 | 1977-12-02 | PROCEDURE FOR CONTINUOUS PREPARATION OF A PIPE OR PIPE BUNDLE WITH A FOAM SHOULDER INSULATOR |
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 BE BE183082A patent/BE861390A/en not_active IP Right Cessation
- 1977-12-01 SE SE7713633A patent/SE7713633L/en not_active Application Discontinuation
- 1977-12-01 AT AT860677A patent/AT364530B/en not_active IP Right Cessation
- 1977-12-02 CA CA292,236A patent/CA1086038A/en not_active Expired
- 1977-12-02 NL NL7713384A patent/NL7713384A/en not_active Application Discontinuation
- 1977-12-02 DK DK539377A patent/DK150237C/en not_active IP Right Cessation
- 1977-12-02 CH CH1478277A patent/CH625997A5/en not_active IP Right Cessation
- 1977-12-02 JP JP14492777A patent/JPS53102387A/en active Pending
Also Published As
Publication number | Publication date |
---|---|
GB1543687A (en) | 1979-04-04 |
NL7713384A (en) | 1978-06-06 |
SE7713633L (en) | 1978-06-04 |
CA1086038A (en) | 1980-09-23 |
JPS53102387A (en) | 1978-09-06 |
AT364530B (en) | 1981-10-27 |
BE861390A (en) | 1978-03-31 |
DK150237C (en) | 1987-10-26 |
FR2372690B1 (en) | 1984-01-27 |
DE2654879C2 (en) | 1982-11-11 |
DE2654879A1 (en) | 1978-06-08 |
DK539377A (en) | 1978-06-04 |
CH625997A5 (en) | 1981-10-30 |
ATA860677A (en) | 1981-03-15 |
FR2372690A1 (en) | 1978-06-30 |
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Legal Events
Date | Code | Title | Description |
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PBP | Patent lapsed |