Ptfe ke e 'ngoe ea mefuta ea polasetiki ea fluorine, e sebelisetsoang ho sebetsa le ho kenya lera, ka lebaka la ptfe ka ntlha ea ho qhibiliha 327 ℃, le e phahameng ho feta ntlha ea ho qhibiliha 360 ℃ ho sebelisa mekhoa ea ho bōptjoa ha li-push extrusion sintering, ts'ebetso e thata haholoanyane, ts'ebetso. ho laola boleng ho kenyelletsa lintlha tse ngata, hang ha taolo e se e ntle, e ka etsa hore ts'ebetso ea extrusion e hlahe kapa e hlahelle mefuta eohle ea bothata ba boleng;Hang ha extrusion le sintering e sa atlehe, e tla etsa hore karolo ea thepa kapa likheo tsohle, theko ea ptfe e theko e boima, kahoo e bakile litšila tse kholo.
Ptfe ke e 'ngoe ea mefuta ea polasetiki ea fluorine, e sebelisetsoang ho sebetsa le ho kenya lera, ka lebaka la ptfe ka ntlha ea ho qhibiliha 327 ℃, le e phahameng ho feta ntlha ea ho qhibiliha 360 ℃ ho sebelisa mekhoa ea ho bōptjoa ha li-push extrusion sintering, ts'ebetso e thata haholoanyane, ts'ebetso. ho laola boleng ho kenyelletsa lintlha tse ngata, hang ha taolo e se e ntle, e ka etsa hore ts'ebetso ea extrusion e hlahe kapa e hlahelle mefuta eohle ea bothata ba boleng;Hang ha extrusion le sintering e sa atlehe, e tla etsa hore karolo ea thepa kapa likheo tsohle, theko ea ptfe e theko e boima, kahoo e bakile litšila tse kholo.Ka hona, hoa hlokahala ho laola ts'ebetso ea extrusion ea ptfe ka mokhoa o utloahalang, ka botlalo le ka katleho, e leng boemo bo hlokahalang ho netefatsa boleng ba sehlahisoa le ho fokotsa litšila.
E Thehiloe holim'a kopo le tshebetso tshebetso ya ptfe lintho tse bonahalang ka lithapo tsa motlakase le lik'hebole le phihlelo e sebetsang, pampiri e fana ka kakaretso e khutšoanyane ea tshebetso ptfe insulation extrusion, ka tšepo ea ho thusa litheknishiene tlhahiso ho etsa khetho e nepahetseng le taolo ka tshebetso ptfe extrusion.
Mokhoa oa theknoloji:
1. Sieve F4 phofo
Ptfe phofo ke likaroloana tsa phofo ka mor'a polymerization, e bonolo, matla a manyane haholo, ha a le ka har'a sephutheloana se bolokiloeng habonolo ka boima ba 'mele kapa ho sisinyeha ha moferefere ha ho tsamaea ka har'a sehlopha, ho kopanya ntho e sa tšoaneng, kahoo pele ho kopanya ho tlameha ho amohela litlhaloso tse itseng tsa skrine ea letloo ho sieve. ptfe phofo, sefa lisebelisoa tse kholoanyane tsa ho pheha starch, lintlha tsa skrineng sa mesh ho 8 le 12 mesh lia bohlokoa.Haeba agglomeration e tebile, phofo e lokela ho behoa ka mocheso o tlase, ka mor'a nako e itseng, haeba agglomeration e bontša matšoao a ho lokoloha, joale ho hlahlojoa.Phofo e lokela ho bolokoa sebakeng sa mocheso o tlase, 'me e lokela ho tšoaroa ka bonolo ha e ntse e sebetsa, e le ho qoba ho kopana ho matla ha phofo ea ptfe' me e ke ke ea sebelisoa.Ho phaella moo, bohloeki ba tikoloho bo lokela ho netefatsoa 'me litšila kapa lerōle ha lia lokela ho kopanngoa le phofo ea ptfe.Ka lebaka la matla a electrostatic adsorption ea ptfe powder, ho bonolo ho adsorb moea kapa litšila tse nyenyane le lerōle ho pota-pota, kahoo ho boloka tikoloho e hloekile ntle le lerōle, sebaka sa setshelo sa ho paka se lokela ho hloeka pele se bula sekoahelo.
2. Phekolo ea toner kapa pulp
Ha insulation e hloka mebala bakeng sa boitsebahatso, karolo e itseng ea toner kapa slurry e lokela ho eketsoa ho ptfe powder.Toner ke ka mor'a ho sila ha mocheso o phahameng o hanyetsanang le organic kapa inorganic pigment powder, ho bonolo ho monya mongobo, agglomeration, kahoo esale pele e lokela ho futhumala kalafo, ho tlosa mongobo, le skrine, ho sefa likaroloana tse kholoanyane.Ka kakaretso, lintlha tse 180 le 200 tsa mesh skrineng li nepahetse.Haeba skrine ea skrine e le nyane ho feta 180 mesh, joale likaroloana tsa pigment ka mor'a ho sefa li kholoanyane, tse sa lumellaneng le ts'ebetso ea insulation ea lera la ho pata.Mesh ea skrine e feta 200 mesh.Leha ts'ebetso ea insulation ea layer e tiisitsoe, ho thata ho sefa.Paste ea mebala ke motsoako oa toner le mokelikeli o mafura, toner sebakeng sa ho emisoa ha mokelikeli o nang le oli, empa e eme ka nako e itseng e tla theoha, ka hona, pele ho ts'ebeliso e lokela ho sisinyeha le ho tsoakoa, e le hore likaroloana tsa toner tsa precipitate li emisoa ka mokhoa o ts'oanang ka mokelikeli o mafura hore o sebelisoe. .
3. Metsoako
Batching ke tokisetso ea bohlokoa pele e kopanya, ho ea ka karo-karolelano ea phofo ea polytetrafluoroethylene le thuso ea extrusion, kapa phofo ea 'mala kapa peista ea mebala e loketse, ka mor'a motsoako.
Ho na le mefuta e meng ho fetaextruder, tse kang yan 20 aviation peterole, toluene, petroleum ether, kapa oli e 'ngoe e sa tsitsang ea solvent, solvent organic, joalo-joalo, lebelo le fapaneng la extruder volatilization le fapane, ho ea ka boemo ba sebele ba thepa, lebelo la extrusion ho khetha extruder e loketseng.Mothusi oa extrusion o fetoha ka potlako haholo, leha a ka khutsufatsa nako ea ho omisa le ho ntlafatsa lebelo la extrusion, o hloka nako e thata ea ts'ebetso bakeng sa ho lokisoa pele ho extrusion, mme nako ea ts'ebetso ea ho itokisa ha ea lokela ho ba telele haholo, ho seng joalo mothusi oa extrusion oa sekheo o tla ba teng. e se sebetse ka lebaka la ho feto-fetoha ho feteletseng .Extruder e lieha haholo ho fetoha mouoane, 'me le hoja ho ka' na ha e-ba le nako e lekaneng ea ho lokisetsa, nako ea ho omisa e tlameha ho atolosoa kapa litlhoko tse phahameng tsa matla a thepa lia hlokahala.Karolo ea extruder e lokela ho ba 18% le 23%, 'me e lokela ho fetoloa ho latela litlhaloso tsa mokhanni, botenya ba lera la insulation,extrusionlebelo le khatello ea extrusion.Ka kakaretso, litlhaloso tsa terata li kholoanyane, botenya ba ho kenya letsoho bo tebile, lebelo la extrusion le potlakile, khatello e nyane, karolo ea extruder e ka ba nyenyane ka ho loketseng;Ho fapana le hoo, litlhaloso tsa terata li nyane, botenya ba insulation bo bobebe, lebelo la extrusion le ea butle, khatello e kholoanyane, karolo ea extruder e ka ba kholoanyane ka nepo.
Li-toner li bitsa chelete e tlaase 'me li ntse li sebelisoa le kajeno.Ho sebelisa li-pigments ho daea, PTFE insulation dispersion in toner as peste, toner le ptfe powder ke motsoako o omileng, le li-additives tsa toner le tse nyenyane haholo, ho bonolo ho baka lihlopha tsa ho kopanya, ho qhalakanngoa ho futsanehile, ha ho bonolo ho kopanya, ho tla lebisa ho chromatism e tebileng. karolo e fapaneng ea ho kenya letsoho, kahoo boholo ba eona bo nyane ka hohle kamoo ho ka khonehang ha u khetha litlhoko tsa toner, boleng ba toner bo tsoang linaheng tse ling bo molemo.Ka ho kopanya toner, o lokela ho khetha pigment phofo mocheso mamello ka holimo 400 ℃, ho seng joalo ka mor'a hore mocheso o phahameng sintering (sintering mocheso ka kakaretso motheo ka 350, 400 ℃) ka 'na hlaha sehlahisoa fading ketsahalo.Ka kakaretso, li-pigments tsa inorganic li na le khanyetso e ntle ea mocheso o phahameng, athe li-pigments tsa tlhaho li na le khanyetso e mpe ea mocheso o phahameng.Ka hona, ts'ebeliso ea li-pigment tsa inorganic e le toner e tšepahala haholoanyane, empa ts'ireletso ea eona ea tikoloho e fokola.Karolelano e tšoanang ea toner hangata ha e fete]%, tlhahisong ea 'nete e ka ba ho latela mofuta oa toner, boleng ba toner, litlhoko tsa mebala, botenya ba lera la insulation, joalo-joalo.
Le hoja litšenyehelo tsa pente ea mebala li phahame, li lumellana le ho tšoana ha motsoako 'me ke khetho e nepahetseng, e ka netefatsang ka katleho boleng ba sehlahisoa, ts'ebetso e bonolo, ts'ebetso e phahameng le litšila tse fokolang.Ha o kopanya pente ea mebala, pente ea mebala e ka ekeletsoa ho thuso ea extrusion mme e kopantsoe ka ho lekana.Ka lebaka la palo e batlang e le ngata ea extruder, e kolobile e kopantsoe le phofo ea ptfe, kahoo ha ho na bothata ba toner agglomeration, 'me ho hasana ho molemo haholo, ho bonolo ho kopanya ka mokhoa o ts'oanang.Karolo ea pente ea mebala hangata e pakeng tsa 0.3% le 0.5 ‰, 'me 3 ‰ e le bongata.Ke linyeoe tse 'maloa feela tse khethehileng tse hlokang karolo ea 0.5 ‰.Ha karolo ea 0.5 ‰. Ha sekhahla sa lera la lera botenya bo batla bo le tšesaane, karolo ea 'mala oa peista e lokela ho eketseha ka tsela e nepahetseng ka 0,1%, 0,2.
4. Motsoako
Ho kopanya ke ho kopanya phofo ea polytetrafluoroethylene ka thuso ea extrusion, kapa phofo ea mebala kapa peista ea mebala ka ho lekana, ho etsa bonnete ba hore extrusion insulation lubrication le mebala e ts'oanang.Bakeng sa ho nolofatsa ho kopanya junifomo, bophahamo ba botlolo ea motsoako o akaretsang (botlolo ea molomo o pharaletseng) e loketse lilithara tse 4, 5, boleng ba ho jara bo ka bang 800, 1 000 g, bophahamo ba molumo bo nkang karolo ea 2/3 ea botlolo e kopanyang. molumo o motle, kahoo ho na le sebaka se lekaneng sa ho kopanya.
Motsoako oa 'mala oa tlhaho (haholo-holo o sebelisetsoang ho phunya mohatla oa mohala oa maqhubu a seea-le-moea) ha o hloke ho eketsa toner.Ha o kopanya, kenya phofo ea ptfe ka botlolong ea ho kopanya pele.E sebelisoa ho etsa hore batho ba leke ho se kopane le ho kopanya botlolo ea lebota la botlolo, ka seqo ho pepeta thuso e fumanehang letlapa le hloekileng sesebelisoa se tla kopanya ka bonolo ka har'a botlolo bohareng ba bokaholimo ba phofo ea ptfe ho lerako la botlolo, etsa setsi sa eona sa bokaholimo ho theha botlolo. botebo ba hoo e ka bang 2, 3 c ea sekoti sa conical, joale batho ba sebelisoa ka ho toba ka tekanyo e itseng ka sekoting sa taper;Ka mor'a moo, botlolo ea ho kopanya e tla koaheloa le ho tiisoa ka thata ho thibela extruder hore e se ke ea senyeha.Taba ea pele, botlolo ea ho kopanya e tla sisinyeha ebe e tsoakoa ka letsoho ka nako e ka tlase ho metsotso e 5, ebe botlolo ea ho kopanya e tla beoa mochining o kopanyang ho sisinyeha le ho roala metsotso e fetang 30 ho fihlela motsoako o lekana.
5. Compact
Phello ea ho hatella (material) billet ke ho hatella phofo e hlephileng ea polytetrafluoroethylene ho billet e batlang e kopane, ho tlosa li-pores le moea tse teng ho eona bakeng sa tšebeliso ea extruding.Ka kakaretso e lokela ho ba tikolohong ea 20 ℃ ka holim'a khatiso e se nang letho, e tla ba homogenized phofo butle-butle tšela ka har'a silindara ea khatello, ka nako e ts'oanang e lokela ho etsa bonnete ba hore pelo ea molamu le khatello ea silindara e concentric, 'me ka bonolo sisinya moqomo oa khatello ka har'a lintho tse bonahalang holim'a, 'me joale eketsa khatello ea sekoahelo ho eona.Khatello e lokela ho ba e loketseng, e ngata haholo kapa e nyenyane haholo e tla ama boleng ba extrusion.Haeba khatello ea sekheo e le khōlō haholo, extruder e bonolo ho hatelloa haholo, 'me ts'ebetso ea lubrication nakong ea extrusion e fokotsehile, khatello ea extrusion e eketseha,' me khatello ea ho kuta ea thepa e kholoanyane, e lebisang ho fibrosis e feteletseng, e leng ha e lumellane le botsitso ba bophara ba ka ntle ba ho kenngoa ha extrusion, 'me tekanyo ea shrinkage ea sintering e kholoanyane, eo hape e leng bonolo ho baka ho phunyeha ha insulation.
6. Finyella ka ntle
Mosebetsi oa ho lokisetsa ptfe insulation extrusion haholo-holo o akarelletsa ho khetha compression karo-karolelano, preheating le futhumatsang ea extrusion silindara le shoa, phetoho ea lekhalo la nale pakeng tsa shoe sleeve le die konokono, tjhaja letho, mokhanni tlhahlobo, ho phunya conductor, tokiso ea khoele tsitsipano, motsoako ho tiisa. ea hlooho ea mochini le silindara ea extrusion, joalo-joalo, e tla hlahisoa ho tse latelang.
Karo-karolelano ea compression ea mefuta e fapaneng ea phofo ea ptfe nakong ea extrusion e boetse e fapane.e nepahetseng compression karo-karolelano e lokela ho ikemiseditse ho ea ka thepa ea ptfe phofo ho etsa bonnete ba tshebetso tshebetso le boleng nakong extrusion.Extrusion compression ratio e bolela karo-karolelano pakeng tsa sebaka sa annular sa extrusion die le sebaka sa annular sa sekheo.Ka kakaretso, li-cylinders tsa extruder li arotsoe ka boholo bo tharo: tse nyane, tse mahareng le tse kholo.Bophara ba cylinder e nyenyane e ka bang 38 mm, cylinder e bohareng e ka bang 50 mm, 'me cylinder e kholo e ka bang 65 mm. Ka tlhahiso ea sebele, litlhaloso tsa extruder cylinder li lokela ho khethoa ho ea ka sebaka sa karolo ea karolo ea extruder insulation layer.
E le ho boloka mocheso o tsitsitseng oa sekheo le ho thusa ho volatilization ea extruder ka mor'a extrusion, cylinder ea extrusion le hlobo li lokela ho futhumala hantle.Mocheso oa preheating oa silinda ea extrusion e lokela ho ba 30 kapa 40 ℃, 'me mocheso oa ho futhumatsa oa hlobo o lokela ho ba 50 kapa 60 ℃.
The extrusion e lokela ho ba ho ea ka litlhaloso tsa e tsamaellanang le hlobo hlobo le ho ea ka sebaka sa kopano, le hlobo sleeve behang line molaleng baahi le nale tube pakeng tsa sebaka (lekhalo) ho boemo bo loketseng.Sebaka se seholo haholo kapa se senyenyane haholo se tla ama boleng ba lera la extruded insulation.Haeba lekhalo le le lenyenyane haholo, lebelo la extrusion ea thepa ea ptfe ho ea ka ntle ho hlobo e tla potlakisa, 'me thepa e tla khaoloa ka mokhoa o feteletseng, e leng se lebisang ho fibrosis e feteletseng, e leng se fellang ka ho fokotseha ha matla a pota-potileng a lera la ho pata, sehlahisoa se sekametse ho mapetsong a longitudinal kapa mapetsong a ka hare a ho kenya letsoho, 'me sekontiri le sekontiri sa mokhanni ha se thata (ho na le "sekoahelo se hlephileng").Lekhalo le leholo haholo, le tla etsa hore ptfe e be thepa e ka ntle ho hlobo ea extrusion velocity butle butle. , khatello ea thepa ho mokhanni oa eketseha, hangata etsahala extrusion ho se tsitse kapa etsa hore conductor compression rolling le hlahisa "pine" bothata, 'me mokhanni a ke ke a feta ka nale polaka phenomenon.
Nako ea poso: Jan-01-2018