SE529435C2 - Two tubes are provided with a thermoplastic coating and have a connecting part with a greater diameter than their main part - Google Patents

Two tubes are provided with a thermoplastic coating and have a connecting part with a greater diameter than their main part

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Publication number
SE529435C2
SE529435C2 SE0600700A SE0600700A SE529435C2 SE 529435 C2 SE529435 C2 SE 529435C2 SE 0600700 A SE0600700 A SE 0600700A SE 0600700 A SE0600700 A SE 0600700A SE 529435 C2 SE529435 C2 SE 529435C2
Authority
SE
Sweden
Prior art keywords
thermoplastic
parts
joint
joint zone
metal
Prior art date
Application number
SE0600700A
Other languages
Swedish (sv)
Other versions
SE0600700L (en
Inventor
Anders Moberg
Original Assignee
Alvenius Ind Ab
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alvenius Ind Ab filed Critical Alvenius Ind Ab
Priority to SE0600700A priority Critical patent/SE529435C2/en
Publication of SE0600700L publication Critical patent/SE0600700L/en
Publication of SE529435C2 publication Critical patent/SE529435C2/en

Links

Classifications

    • 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
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/3404—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint
    • B29C65/342—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" characterised by the type of heated elements which remain in the joint comprising at least a single wire, e.g. in the form of a winding
    • 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
    • B29C65/34—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement"
    • B29C65/36—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated elements which remain in the joint, e.g. "verlorenes Schweisselement" heated by induction
    • 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
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • 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
    • B29C66/74—Joining plastics material to non-plastics material
    • B29C66/742—Joining plastics material to non-plastics material to metals or their alloys
    • 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
    • F16L13/00—Non-disconnectible pipe-joints, e.g. soldered, adhesive or caulked joints
    • F16L13/02—Welded joints
    • F16L13/0254—Welded joints the pipes having an internal or external coating
    • 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
    • F16L47/02—Welded joints; Adhesive joints

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

Two tubes (1,2) are provided with a thermoplastic coating (1a,2a) and have a connecting part (3) with a greater diameter than their main part. When the pipe ends are drawn together, the extending parts (3) of the second tube (2) are drawn over the end parts of the first tube (1). The extending parts are provided with at least an inner layer of thermoplastic (2a). Even the outer parts can be coated with thermoplastic. Even the first tube is provided with both an outer (1a) and an inner layer of thermoplastic. The tube parts have ambient temperature on being joined together and the two thermoplastic coatings (1a,2a) after joining are in contact with each other. Thereafter, a joint zone is heated corresponding to the extending parts up to a temperature of approximately 250 degrees Celsius. The thermoplastic-lined surfaces are essentially softened at this temperature and bind together. After cooling to ambient temperature, a stable joint between the tubes is formed.

Description

529 435 2. 529 435 2.

Tennoplasten skall ha god flexibilitet och medge kraftig böjning och även upprepade höjningar utan att spricka. Draghållfasthet på ca 12Mpa, med en brottduktilitet på mer än 500 % ger en lämplig terrnoplast enligt uppfinningen.The tin plastic must have good flexibility and allow strong bending and also repeated raises without cracking. Tensile strength of about 12 MPa, with a breaking ductility of more than 500% gives a suitable thermoplastic according to the invention.

Hårda termoplaster t ex polykarbonat med aromatríngar såsom plexiglas är inte lämpliga för uppfinningen, inte heller rekommenderas termoplaster med mjukgörare såsom polyvinylklorid.Hard thermoplastics, for example polycarbonate with aromatic rings such as plexiglass, are not suitable for the invention, nor are thermoplastics with plasticizers such as polyvinyl chloride recommended.

Termoplasten är lätt att applicera mot ett underlag och kan även appliceras på mycket komplexa strukturer med garanterad minsta tjocklek över hela ytan.The thermoplastic is easy to apply to a substrate and can also be applied to very complex structures with a guaranteed minimum thickness over the entire surface.

Vid sammanfogning av två termoplastbelagda metalldelar förs delarna samman på önskvärt sätt, tex genom att en del träs över den andra delen, så att två terrnoplastbeklädda ytor kommer att gränsa mot varandra. Därefter värrns kontaktområdet som utgör fogzonen upp till en temperatur mellan 230 - 350 grader, så att plasten mjuknar. Uppvärmningen kan ske genom t ex induktionsuppvärmning eller genom att ett tennoplastskikt med ingjuten värmetråd placerats i fogzonen. De varma ytoma är i kontakt med varandra och en stark bindning mellan plastskikten åstadkommes och efter avsvalning är delarna sammanfogade. Tvärsnittet av en fog visar att termoplasskikten har god vidhäftning mot respektive metalldel och att skiktytorna har blandats och har en god bindning mot varandra. Det har visat sig att detta är tillräckligt för att åstadkomma en god sammanfogning av termoplastbeklädda metalldelar och som uppfyller de krav på hållfasthet som ställs på den färdiga strukturen.When joining two thermoplastic-coated metal parts, the parts are brought together in the desired manner, for example by threading one part over the other part, so that two thermoplastic-coated surfaces will adjoin each other. The contact area that forms the joint zone up to a temperature between 230 - 350 degrees is then protected, so that the plastic softens. The heating can take place by, for example, induction heating or by placing a tin-plastic layer with cast-in heating wire in the joint zone. The hot surfaces are in contact with each other and a strong bond between the plastic layers is achieved and after cooling the parts are joined together. The cross section of a joint shows that the thermoplastic layers have good adhesion to the respective metal part and that the layer surfaces have been mixed and have a good bond to each other. It has been found that this is sufficient to achieve a good joining of thermoplastic clad metal parts and which meets the strength requirements placed on the finished structure.

Det är vanligtvis j ärn-baserade metallegeringar som förses med tennoplastbeläggning, men metoden är tillämplig även för andra metaller som försetts med terrnoplastskydd.It is usually iron-based metal alloys that are provided with pewter coating, but the method is also applicable to other metals that have been provided with thermoplastic protection.

Metoden är tillämplig på ett stort antal system, tex rörsystem av olika grovlek bestående av termoplastskyddade rör för användning i gruv, olje- eller kemisk industri eller andra användningsområden där rörsystemet utsätts för kernisk eller elektrokemisk påverkan.The method is applicable to a large number of systems, such as pipe systems of various sizes consisting of thermoplastic-protected pipes for use in mining, the oil or chemical industry or other areas of use where the pipe system is exposed to nuclear or electrochemical influences.

Metoden är också tillämbar för att bygga upp andra strukturer av termoplastbelagda delar såsom t ex stegar, stolpar, bevattningsutrustnin g odyl vilka är påförda termoplastskikt för att förbättra korrosionsresistensen.The method is also applicable for building up other structures of thermoplastic coated parts such as ladders, poles, irrigation equipment and the like which are coated with thermoplastic layers to improve the corrosion resistance.

Figurbeskrivning Figur 1 visar tvâ rör (1,2) försedda med terrnoplastbeläggning (1a,2a). Rör (2) har en avslutande del (3) med större diameter än huvuddelen av röret. Vid samrnanfogning av 529 435 á rörändarna, träs den utkragade delen (3) av rör (2) över änddelen av rö_r_ (1). Kragdelen (3) är försedd med åtmindstone ett invändigt skikt av termoplast (2a). Aven den yttre delen kan vara termoplastbelagd. Även rör (1) är försett med både ett yttre (la) och ett inre skikt av termoplast. Rördelarna har omgivningstemperatur vid sammanföringen och skikt (la) kommer efter påförandet att vara i kontakt med skikt (2a). Därefter värms en fogzon motsvarande utkragningsdelen (3) upp till en temperatur av ca 250 grader C.Figure description Figure 1 shows two pipes (1,2) provided with a thermoplastic coating (1a, 2a). Pipes (2) have a terminating part (3) with a larger diameter than the main part of the pipe. When joining 529 435 to the pipe ends, thread the cantilevered part (3) of pipe (2) over the end part of pipe_r_ (1). The collar part (3) is provided with at least one inner layer of thermoplastic (2a). The outer part can also be thermoplastic coated. Tubes (1) are also provided with both an outer (1a) and an inner layer of thermoplastic. The pipe parts have an ambient temperature at the joining and layer (1a) will be in contact with layer (2a) after application. Then a joint zone corresponding to the cantilever part (3) is heated up to a temperature of about 250 degrees C.

Skikten (1 a) och (2a) mj uknar väsentligt vid denna temperatur och kommar att bindas samman. Efter avsvalnin g till omgivningstemperatur har en stabil fog mellan rör (1) och (2) bildats.Layers (1a) and (2a) soften substantially at this temperature and will bond together. After cooling to ambient temperature, a stable joint has been formed between pipes (1) and (2).

Figur 2 visar hur uppvärmning av fo gzonen kan åstadkommas medelst ett induktionsvärmeaggregat (4). Induktionsvärmeaggregatet (4) kan anordnas kring fogzonen samtidigt som utkragningsdelen (3) förs över röränden ( 1). Genom att värma metalldelarna kommer de omgivande plastskikten att värmas upp och bindas samman och en fog bildas efter avsvalning.Figure 2 shows how heating of the fo zone can be achieved by means of an induction heating unit (4). The induction heating unit (4) can be arranged around the joint zone at the same time as the cantilever part (3) is moved over the pipe end (1). By heating the metal parts, the surrounding plastic layers will be heated and bonded together and a joint will be formed after cooling.

I figur 3a visas en rörfog där två rör (1) och (2) med raka ändstycken fogats samman medelst ett svep (5). Rörändarna placeras kant-i-kant och svepet (5) förs över skarven.Figure 3a shows a pipe joint where two pipes (1) and (2) with straight end pieces are joined together by means of a sweep (5). The pipe ends are placed edge-to-edge and the sweep (5) is passed over the joint.

Svepet (5) är av metall belagt med termoplast och dess diameter kan regleras med ett antal bultar (6). Figur 3b visar en genomskärning vid område A-A i figur 3a.The sweep (5) is made of metal coated with thermoplastic and its diameter can be adjusted with a number of bolts (6). Figure 3b shows a section at area A-A in Figure 3a.

Figur 4 visar en sarnmanfogning av två rör (1,2), varvid en termoplastremsa (7) appliceras mellan metalldelarnas termoplastskikt (la, 2a). Termoplastremsan (7 ) är försedd med värmetrådar (8) som kan anslutas till ett kraftaggregat. Vid värmning av termoplastremsan (7) kommer även intilliggande termoplastskikt (la, 2a) att uppvärmas och en fog bildas vid avsvalningen.Figure 4 shows a joint of two pipes (1,2), wherein a thermoplastic strip (7) is applied between the thermoplastic layers (1a, 2a) of the metal parts. The thermoplastic strip (7) is provided with heating wires (8) that can be connected to a power unit. When heating the thermoplastic strip (7), the adjacent thermoplastic layers (1a, 2a) will also be heated and a joint will be formed during the cooling.

Uppfinningen är möjlig att tillämpa på mängd olika strukturer.The invention is possible to apply to a variety of structures.

Claims (1)

1. 529 435 Patentkrav . Metod för sammanfogning av två termoplastbeklädda metalldelar (1, 2) kännetecknad av att termoplastbeklädnadenfla, 2a) har bibringats metalldelen efter att metalldelens yta rengjorts så att den är väsentligen fri från oxider och föroreningar och vid sammanfogningen placeras delarna så att två ytor med termoplast är i kontakt med varandra, därefter värmes en fogzon till en temperatur av ca 230 -350 grader varvid ytskikten blandas och en fog bildas vid avsvalning. . Metod enlig patentkrav 1, kännetecknad av att tennoplasten har god flexibilitet och en brottduktilitet på mer än 500 %. . Metod enligt patentkrav 1 eller 2, kännetecknad av att vännningen av fogzonen sker medelst induktionsvärmning. . Metod enlig patenkrav 3, kännetecknad av att metalldelama (l ,2) utgörs av rör som är både ut-och invändigt beklädda med termoplast, varvid en utkragad rörände (3) träs över den andra röränden, så att det invändiga skiktet (2a) i den yttre röränden har kontakt med det yttre skiktet (la) på den inre röränden, och en en induktionsspole anordnas kring kontaktområdet för uppvärmning av en fogzon. . Metod enligt patentkrav 3, kännetecknad av att metalldelarna (1,2) utgörs av rör, beklädda åtminstone på ut- eller insidan med termoplast och med raka änddelar, varvid vid sammanfogningen av änddelarna placeras dessa kant-i-kant och en rörformad hylsanordning (7) med invändigt skikt av tennoplast skjuts över skarven, därefter värmes fogzonen. . Metod enligt krav 5, kännetecknad av att hylsanordningen är försedd med en bult (6) för att reglera hylsanordningens diameter. . Metod enligt krav 1 eller 2, kännetecknad av att en termoplastremsa (7 ) innefattande en in gj uten värmetråd (8) appliceras på en termoplastyta utgörande en del av fogzonen, så att metalldelarna sammanfogas genom uppvärmning av tennoplastremsan och de angränsande termoplastskikten. . Metod för sammanfogning av två metalldelar (1, 2) kännetecknad av att en fogzon hos varje metalldels yta rengjorts så att den är väsentligen fri från oxider och föroreningar och att en termoplastremsa applicerats över fogzonens ytor varvid vid sammanfogningen termoplastremsorna uppvärmes till 230 - 350 grader, varvid god bindning mot metalldelens yta erhålles och tennoplastskiktens ytskikt blandas och en fog bildas vid avsvalning. 529 455 S 9. Termoplastbeklädd metallstruktur innefattande att antal sammanfogade delar varvid delarna är sammanfogade medelst metod enligt någon eller nagra av patentkraven 1-8.1 529 435 Patent claims. Method for joining two thermoplastic clad metal parts (1, 2) characterized in that the thermoplastic cladding fl a, 2a) has been imparted to the metal part after the surface of the metal part has been cleaned so that it is substantially free of oxides and impurities and at the joining the parts are placed in two thermoplastic surfaces. contact with each other, then a joint zone is heated to a temperature of about 230 -350 degrees whereby the surface layers are mixed and a joint is formed during cooling. . Method according to claim 1, characterized in that the tin plastic has good fl flexibility and a fracture ductility of more than 500%. . Method according to Claim 1 or 2, characterized in that the jointing of the joint zone takes place by means of induction heating. . Method according to patent claim 3, characterized in that the metal parts (1, 2) consist of pipes which are both externally and internally lined with thermoplastic, wherein a cantilevered pipe end (3) is threaded over the other pipe end, so that the inner layer (2a) in the outer pipe end has contact with the outer layer (1a) on the inner pipe end, and an induction coil is arranged around the contact area for heating a joint zone. . Method according to claim 3, characterized in that the metal parts (1, 2) consist of pipes, lined at least on the outside or inside with thermoplastic and with straight end parts, these edge parts being placed at the end of the end parts and a tubular sleeve device (7). ) with an inner layer of pewter plastic is pushed over the joint, then the joint zone is heated. . Method according to claim 5, characterized in that the sleeve device is provided with a bolt (6) for regulating the diameter of the sleeve device. . Method according to claim 1 or 2, characterized in that a thermoplastic strip (7) comprising an inlet without heating wire (8) is applied to a thermoplastic surface forming part of the joint zone, so that the metal parts are joined together by heating the tinplastic strip and the adjacent thermoplastic layers. . Method for joining two metal parts (1, 2) characterized in that a joint zone of each metal part surface is cleaned so that it is substantially free of oxides and impurities and that a thermoplastic strip is applied over the surfaces of the joint zone, the thermoplastic strips being heated to 230 - 350 degrees, whereby good bonding to the surface of the metal part is obtained and the surface layer of the tinplate layers is mixed and a joint is formed upon cooling. 529 455 S 9. A thermoplastic-clad metal structure comprising a number of joined parts, the parts being joined by means of a method according to any one or more of claims 1-8.
SE0600700A 2006-03-22 2006-03-22 Two tubes are provided with a thermoplastic coating and have a connecting part with a greater diameter than their main part SE529435C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
SE0600700A SE529435C2 (en) 2006-03-22 2006-03-22 Two tubes are provided with a thermoplastic coating and have a connecting part with a greater diameter than their main part

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
SE0600700A SE529435C2 (en) 2006-03-22 2006-03-22 Two tubes are provided with a thermoplastic coating and have a connecting part with a greater diameter than their main part

Publications (2)

Publication Number Publication Date
SE0600700L SE0600700L (en) 2007-08-07
SE529435C2 true SE529435C2 (en) 2007-08-07

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Family Applications (1)

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SE0600700A SE529435C2 (en) 2006-03-22 2006-03-22 Two tubes are provided with a thermoplastic coating and have a connecting part with a greater diameter than their main part

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Also Published As

Publication number Publication date
SE0600700L (en) 2007-08-07

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