Ho tjheseletsa ka polasetikike tjheseletso bakeng sa thepa ea polasetiki e felileng, 'me ho ISO 472 e hlalosoa e le mokhoa oa ho kopanya libaka tse nolofalitsoeng tsa thepa, hangata ka thuso ea mocheso (ntle le li-solvents).Welding ea thermoplastics e etsoa ka mekhahlelo e meraro e latellanang, e leng ho lokisa holim'a metsi, ho sebelisa mocheso le khatello, le ho pholisa.
Ho chesoa ka khase e chesang
Ho tjheseletsa ha gase e chesang, e tsejoang hape e le ho cheseletsa moea o chesang, ke mokhoa oa ho cheselletsa ka polasetiki o sebelisang mocheso.Sethunya sa mocheso se entsoeng ka mokhoa o khethehileng, se bitsoang hot air welder, se hlahisa jete ea moea o chesang e nolofatsang likarolo tseo ka bobeli li tla kopanngoa le molamu oa polasetiki, tseo kaofela li tlamehang ho ba tsa polasetiki e tšoanang kapa e tšoanang haholo.(Welding PVC to acrylic ke mokhelo molaong ona.)
Ho cheselletsa moea o chesang / khase ke mokhoa o tloaelehileng oa ho etsa thepa ea ho etsa lintho tse nyane joalo ka litanka tsa lik'hemik'hale, litanka tsa metsi, lisebelisoa tsa mocheso le lisebelisoa tsa lipeipi.
Tabeng ea li-web le lifilimi ho ka 'na ha se ke ha sebelisoa molamu oa ho tlatsa.Lipampiri tse peli tsa polasetiki li futhumatsoa ka khase e chesang (kapa ntho e futhumatsang) ebe li phuthoa hammoho.Ena ke mokhoa o potlakileng oa ho cheselletsa 'me o ka etsoa kamehla.
Ho tjheseletsa ha ntlha ya lebelo
Ka ho cheselletsa ka lebelo, cheseletsa ea polasetiki, e ts'oanang le tšepe ea solder ka chebahalo le metsi, e kentsoe pompo ea phepelo bakeng sa molamu oa weld oa polasetiki.Lebelo la lebelo le futhumatsa molamu le substrate, ha ka nako e ts'oanang e hatella molamu o entsoeng ka ho qhibiliha hore o be boemong.Sefaha sa polasetiki e nolofalitsoeng se behiloe ka har'a lenonyeletso, 'me likarolo le molamu oa weld li behiloe.Ka mefuta e meng ea polasetiki e kang polypropylene, molamu o qhibilihisitsoeng oa welding o tlameha ho "tsoakoa" le lisebelisoa tsa motheo tse entsoeng ka semi-melted tse ntseng li etsoa kapa li lokisoa.Mekhoa ena ea ho cheselletsa e 'nile ea ntlafatsoa ha nako e ntse e ea' me e 'nile ea sebelisoa ka lilemo tse fetang 50 ke litsebi tsa masela a polasetiki le ba lokisang machaba.Mokhoa oa welding oa lebelo ke mokhoa o potlakileng haholo oa ho tjheselletsa 'me ka ho itloaetsa o ka sebelisoa likhutlong tse thata.Phetolelo ea "thunya" ea lebelo ha e le hantle ke tšepe ea solder e nang le ntlha e pharaletseng, e sephara e ka sebelisoang ho qhibilihisa motsoako oa weld le thepa ea ho tlatsa ho theha tlamo.
Ho cheseletsa ka extrusion
Extrusion welding e lumella ho sebelisoa ha li-welds tse kholoanyane sebakeng se le seng sa weld.Ke mokhoa o ratoang oa ho kopanya thepa e fetang 6 mm botenya.Molamu oa welding o huleloa ka letsohong le lenyenyane le ts'oaroang ka polasetiki e entsoeng ka polasetiki, e entsoeng ka polasetiki, 'me e qobelloa ho tsoa ka har'a extruder khahlano le likarolo tse kopantsoeng, tse nolofalitsoeng ka sefofane sa moea o chesang ho lumella tlamahano hore e etsahale.
Ikopanye le welding
Sena se ts'oana le ho cheselletsa matheba ntle le hore mocheso o fanoa ka ho tsamaisa litšepe tsa pincher ho fapana le ho tsamaisa motlakase.Likarolo tse peli tsa polasetiki li bokelloa hammoho moo malebela a futhumetseng a li phunyeletsang, a qhibiliha le ho kopanya likarolo ts'ebetsong.
Ho tjheseletsa poleiti e chesang
E amanang le ho ikopanya le welding, mokhoa ona o sebelisoa ho tjheseletsa likarolo tse kholoanyane, kapa likarolo tse nang le geometry e rarahaneng ea weld joint.Likarolo tse peli tse lokelang ho chesetsoa li behoa ka har'a lisebelisoa tse khomaretsoeng lipoleiting tse peli tse hanyetsanang tsa mochine oa khatiso.Letlapa le chesang, le nang le sebōpeho se lumellanang le geometry ea weld joint ea likarolo tse lokelang ho chesetsoa, e tsamaisoa ka boemo pakeng tsa likarolo tse peli.Lipoleiti tse peli tse hanyetsanang li tsamaisa likarolo ho kopana le poleiti e chesang ho fihlela mocheso o nolofatsa li-interfaces ho ea sebakeng se qhibilihang sa polasetiki.Ha boemo bona bo finyelloa hot plate e tlosoa, 'me likarolo li hatelloa' me li ts'oaroe ho fihlela motsoako oa weld o pholile le ho tiisa hape ho theha tlamo e sa feleng.
Lisebelisoa tsa ho cheselletsa li-hot-plate hangata li laoloa ka pneumatically, hydraulically, kapa motlakase ka li-servo motors.
Ts'ebetso ena e sebelisetsoa ho tjheseletsa likoloi tlas'a likarolo tsa hood, likarolo tsa kahare tsa koloi, lisebelisoa tsa ho hloekisa tsa bongaka, lisebelisoa tsa lisebelisoa tsa bareki, le likarolo tse ling tsa ka hare ho koloi.
High frequency welding
High Frequency welding, e tsejoang hape e le Dielectric Sealing kapa Radio Frequency (RF) Heat Sealing ke theknoloji e holileng haholo esale e le teng ho tloha ka bo-1940.Maqhubu a phahameng a maqhubu a motlakase mofuteng oa Radio Frequencies a ka futhumatsa li-polymer tse itseng ho fihlela li nolofatsa lipolasetiki hore li kopane.Li-plastiki tse futhumetseng, tlas'a khatello li cheseha hammoho.Mocheso o hlahisoa ka har'a polymer ka ho tsosolosoa ka potlako ha lik'hemik'hale tse ling tsa dipoles tsa polymer, e leng se bolelang hore ho futhumatsa ho ka etsoa sebakeng sa heno, 'me ts'ebetso e ka tsoela pele.
Ho tjheseletsa ka ho kenya letsoho
Ha insulator ea motlakase, joalo ka polasetiki, e kentsoe ka thepa e nang le motlakase o phahameng, joalo ka tšepe kapa likhoele tsa khabone, welding e ka etsoa.Lisebelisoa tsa welding li na le coil ea induction e matlafalitsoeng ke motlakase oa radio-frequency.Sena se hlahisa sebaka sa motlakase sa motlakase se sebetsang ho sesebediswa sa motlakase kapa sa ferromagnetic workpiece.Karolong e sebetsang ea motlakase, phello e ka sehloohong ea ho futhumatsa ke ho futhumatsa ho hanyetsang, e leng ka lebaka la maqhubu a bakoang ke metsi a bitsoang eddy currents.Induction welding ea carbon fiber e matlafatsang thepa ea thermoplastic ke theknoloji e sebelisoang hangata indastering ea lifofane.
Ka har'a sesebelisoa sa ferromagnetic, lipolasetiki li ka kenngoa ka hare-hare ka ho li etsa ka metsoako ea tšepe kapa ea ferromagnetic, e bitsoang susceptors.Li-susceptors tsena li monya matla a motlakase ho tsoa ho coil ea induction, lia chesa, 'me li lahleheloa ke matla a tsona a mocheso ho thepa e potolohileng ka ho tsamaisa mocheso.
Ho tjheseletsa ka ente
Ho cheselletsa ente ho tšoana / ho tšoana le ho cheselletsa extrusion, ntle le hore, ho sebelisa malebela a itseng holim'a mochini o ts'oarellang ka letsoho, motho a ka kenya ntlha ka har'a masoba a sekoli a polasetiki a boholo bo fapaneng mme a a lokise ho tsoa kahare.Molemo ke hore ha ho na mokhoa o hlokahalang oa ho kena ka morao ho lesoba le nang le sekoli.Ntho e 'ngoe ke patch, ntle le hore patch e ke ke ea kolobisoa ka polasetiki ea mantlha e potolohileng botenya bo lekanang.PE le PP li loketse ka ho fetisisa bakeng sa mofuta ona oa ts'ebetso.Drader injectiweld ke mohlala oa sesebelisoa se joalo.
Ultrasonic welding
Ka ultrasonic welding, maqhubu a phahameng (15 kHz ho 40 kHz) ho sisinyeha ha amplitude ho sebelisoa ho etsa mocheso ka tsela ea likhohlano pakeng tsa lisebelisoa tse lokelang ho kopanngoa.The segokanyimmediamentsi sa sebolokigolo ea likarolo tse peli e etselitsoe ka ho khetheha ho tsepamisa maikutlo matla bakeng sa palo e kahodimodimo matla weld.Ultrasonic e ka sebelisoa hoo e batlang e le linthong tsohle tsa polasetiki.Ke theknoloji e potlakileng ea ho koala mocheso e fumanehang.
friction welding
Ho friction welding, likarolo tse peli tse lokelang ho bokelloa li kopantsoe hammoho ka lebelo le tlase (hangata 100-300 Hz) le amplitude e phahameng (hangata 1 ho 2 mm (0.039 ho 0.079 in)) ho feta ultrasonic welding.Khohlano e bakoang ke motsamao o kopantsoeng le khatello ea ho koala pakeng tsa likarolo tse peli e baka mocheso o qalang ho qhibiliha libaka tsa ho kopana pakeng tsa likarolo tse peli.Nakong ena, lisebelisoa tse entsoeng ka polasetiki li qala ho etsa lihlopha tse kopanang, e leng se etsang hore ho be le weld e matla.Qetellong ea motsamao oa ho sisinyeha, likarolo li lula li ts'oaretsoe ho fihlela lenonyeletso la weld le fola le polasetiki e qhibilihisitsoeng e tiea hape.Motsamao oa likhohlano o ka ba oa mela kapa oa orbital, mme moralo o kopaneng oa likarolo tse peli o tlameha ho lumella motsamao ona.
Spin welding
Spin welding ke mofuta o itseng oa tšubuhlellano ea likhohlano.Ka ts'ebetso ena, karolo e le 'ngoe e nang le motsoako o pota-potileng weld e ts'oaroa e eme, ha karolo ea ho nyalana e potoloha ka lebelo le phahameng' me e hatelloa khahlanong le karolo e emeng.Khohlano ea ho potoloha pakeng tsa likarolo tse peli e hlahisa mocheso.Hang ha libaka tse kopanyang li fihla boemong ba ho qhibiliha, karolo e ohiang e emisoa hang-hang.Matla holim'a likarolo tse peli e bolokoa ho fihlela motsoako oa weld o pholile 'me o tiisa hape.Ena ke mokhoa o tloaelehileng oa ho hlahisa mabili a polasetiki a sa sebetseng hantle le a mahareng, mohlala, bakeng sa libapalisoa, likariki tsa mabenkele, meqomo e sebelisoang hape, joalo-joalo. Ts'ebetso ena e boetse e sebelisoa ho cheselletsa menyetla e fapaneng ea boema-kepe hore e be likoloi tse ka tlas'a hood.
Ho chesoa ka laser
Mokhoa ona o hloka hore karolo e 'ngoe e fetisetsoe ho beam ea laser 'me karolo e' ngoe e monye kapa e koahetsoeng ka har'a sehokelo hore e khone ho monya.Likarolo tse peli li behoa tlas'a khatello ha lebone la laser le ntse le tsamaea moleng o kopanyang.Beam e feta karolong ea pele 'me e kenngoa ke e' ngoe kapa ho roala ho hlahisa mocheso o lekaneng ho nolofatsa sebopeho se etsang weld e sa feleng.
Li-lasers tsa semiconductor diode hangata li sebelisoa ho cheselletsa polasetiki.Maqhubu a bolelele ba 808 nm ho isa ho 980 nm a ka sebelisoa ho kopanya metsoako e fapaneng ea thepa ea polasetiki.Maemo a matla ho tloha ka tlase ho 1W ho isa ho 100W a hlokahala ho latela thepa, botenya le lebelo la ts'ebetso le lakatsehang.
Solvent tjheseletsa
Ka tjheseletsa ea solvent, solvent e sebelisoa e ka qhaqhang polymer ka nakoana mocheso oa kamore.Ha sena se etsahala, liketane tsa polymer li lokolohile ho tsamaea ka har'a mokelikeli 'me li ka kopana le liketane tse ling tse qhibilihisitsoeng ka mokhoa o ts'oanang karolong e' ngoe.Ha ho fanoe ka nako e lekaneng, solvent e tla phunyeletsa ka polymer le ho tsoa tikolohong, e le hore liketane li lahleheloe ke ho tsamaea ha tsona.Sena se siea boima bo tiileng ba liketane tsa polymer tse kentsoeng tse etsang cheseletso e qhibilihang.
Mokhoa ona o atisa ho sebelisoa bakeng sa ho hokahanya pipe ea PVC le ABS, joalo ka lipeipi tsa malapa."Ho kopanya" hammoho le mefuta ea polasetiki (polycarbonate, polystyrene kapa ABS) le eona ke ts'ebetso ea ho tjheseletsa ka solvent.
Nako ea poso: May-10-2018