Blow molding ke mokhoa oa ho etsa tube e qhibilihisitsoeng (e bitsoang parison kapa preform) ea thepa ea thermoplastic (polymer kapa resin) le ho beha parison kapa preform ka har'a mokoti oa hlobo le ho kenya tube ka moea o hatelitsoeng, ho nka sebopeho sa lesoba le ho phodisa karolo pele o ntsha hlobo.
Karolo efe kapa efe e sekoti ea thermoplastic e ka bōptjoa.
Likarolo ha li felle feela libotlolong, moo ho nang le monyetla o le mong, 'me hangata e nyane ka bophara kapa boholo ho feta boholo ba 'mele. Tsena ke tse ling tsa libopeho tse sebelisoang haholo ho pakang bareki, leha ho le joalo ho na le mefuta e meng e tloaelehileng ea likarolo tse bopehileng, ho kenyeletsoa, empa ha e felle feela ho:
- Lijana tse ngata tsa indasteri
- Mohloa, serapa le thepa ea ntlo
- Lisebelisoa tsa bongaka le likarolo, lintho tsa ho bapala
- Lihlahisoa tsa indasteri ea kaho
- Likoloi-tlas'a likarolo tsa hood
- Lisebelisoa tsa lisebelisoa
Phahamisa Molding Mekhoa ea Tlhahiso
Ho na le mefuta e meraro ea mantlha ea ho etsa blow molding:
- Ho bopa leqhubu la extrusion
- Ho bopa ho hlaba ka ente
- Ente e otlollehang ho bopa
Phapang e kholo har'a bona ke mokhoa oa ho theha parison; ebang ke ka extrusion kapa ente ea ho bōptjoa, boholo ba parison le mokhoa oa ho tsamaea pakeng tsa parison le hlobo; e ka ba e emeng, e tsamayang, e tsamayang ka mela kapa ya rotary.
Ho Extrusion Blow Molding-(EBM) polymer e ea qhibiliha 'me mokelikeli o tiileng oa extruded o ntšetsoa ka lesela ho etsa tube e sekoti kapa parison. Lihalofo tse peli tsa hlobo e pholileng li koaloa ho pota-pota parison, moea o hatelitsoeng o kenngoa ka pinana kapa nale, o o kenya ka sebōpeho sa hlobo, kahoo o hlahisa karolo e se nang letho. Ka mor'a hore polasetiki e chesang e pholile ka ho lekaneng, hlobo e butsoe 'me karolo e ntšoa.
Ho EBM ho na le mekhoa e 'meli ea mantlha ea extrusion, e tsoelang pele le e sa khaotseng. Ka ho tsoelang pele, parison e extruded ka ho tsoelang pele 'me hlobo e fallela hole le hole le parison. Ka nako e sa lekanyetsoang, polasetiki e bokelloa ke extruder ka phaposing, ebe e qobella ka lefu ho theha parison. Hangata hlobo e ema ka tlas'a kapa ho potoloha extruder.
Mehlala ea Ts'ebetso e Tsoelang Pele ke Mechini ea Continuous Extrusion Shuttle le Mechini ea Rotary Wheel. Mechini ea nakoana ea extrusion e ka ba Reciprocating Screw kapa Accumulator Head. Lintlha tse fapaneng li nahanoa ha ho khethoa lipakeng tsa lits'ebetso le boholo kapa mehlala e teng.
Mehlala ea likarolo tse entsoeng ke ts'ebetso ea EBM e kenyelletsa lihlahisoa tse ngata tse se nang letho, joalo ka libotlolo, likarolo tsa indasteri, lintho tsa ho bapala, likoloi, lisebelisoa tsa lisebelisoa le liphutheloana tsa indasteri.
Mabapi le ts'ebetso ea Injection Blow Systems - (IBS), polymer e bōptjoa holim'a mokokotlo ka har'a sekoti ho etsa tube e sekoti e bitsoang preform. Li-preforms li potoloha holim'a molamu oa mantlha ho ea ho hlobo e otlang kapa liforomo tsa seteisheneng sa ho foka moea le ho pholile. Ts'ebetso ena hangata e sebelisoa ho etsa libotlolo tse nyane, hangata 16oz/500ml kapa ka tlase ho lihlahisoa tse phahameng haholo. Ts'ebetso e arotsoe ka mehato e meraro: ente, ho foka le ho ntša, tsohle li etsoa ka mochine o kopantsoeng. Likarolo li tsoa ka litekanyo tse nepahetseng tse phethiloeng 'me li khona ho tšoara mamello e thata-ntle le thepa e eketsehileng ha e etsoa e sebetsa hantle haholo.
Mehlala ea likarolo tsa IBS ke libotlolo tsa meriana, likarolo tsa bongaka, le litlolo le liphutheloana tse ling tsa lihlahisoa tsa bareki.
Injection Stretch Blow Molding- (ISBM) ts'ebetso ea Injection Stretch Blow Molding- (ISBM) e tšoana le mokhoa oa IBS o hlalositsoeng ka holimo, ka hore preform e entsoe ka ente. Joale preform e bōpiloeng e hlahisoa ho hlobo e otlang ka boemo bo hlophisitsoeng, empa pele ho phefumoloha ho qetela ha sebopeho, preform e otlolloa ka bolelele hammoho le radially. Li-polymer tse tloaelehileng tse sebelisoang ke PET le PP, tse nang le litšobotsi tsa 'mele tse matlafatsoang ke karolo e otlolohileng ea ts'ebetso. Ho otlolla hona ho fana ka karolo ea ho qetela e ntlafetseng ea matla le thepa ea lithibelo ho boima bo bobebe haholo le botenya bo betere ho feta IBS kapa EBM-empa, ntle le meeli e meng e kang lijana tse tšoaroang, joalo-joalo. ISBM e ka aroloa kaMohato o le MongleMehato e 'melitshebetso.
HoMohato o le Mongts'ebetso ea ho etsa preform le ho foka ha botlolo li etsoa ka mochini o le mong. Sena se ka etsoa ka mechine e 3 kapa 4 ea seteishene, (Ente, Conditioning, Blowing and Ejection). Ts'ebetso ena le lisebelisoa tse amanang le tsona li ka sebetsana le libotlolo tse nyane ho isa ho tse phahameng tsa libotlolo tse fapaneng tsa sebopeho le boholo.
HoMehato e 'melisebetsa polasetiki e qala ka ho bōptjoa ho preform ho sebelisa mochine oa ho bopa ente o arohaneng le mochini o otlang. Tsena li hlahisoa ka melala ea libotlolo, ho kenyelletsa le likhoele pheletsong e bulehileng ea preform e koetsoeng ea sekoti. Li-preforms tsena lia pholile, li bolokoe, 'me hamorao li fepeloa mochining oa ho bopa o futhumatsang hape. Ts'ebetsong ea Mehato e Meli ea Reheat Blow, li-preforms li futhumatsoa (hangata li sebelisa li-heaters tsa infrared) ka holim'a mocheso oa phetoho ea khalase, ebe li otlolloa le ho butsoe ka moea o nang le khatello e phahameng ka har'a hlobo.
Ts'ebetso ea Mehato e Meli e loketse haholo lijana tse ngata haholo, litara e le 1 ho ea tlase, ka tšebeliso e hlokolosi haholo ea resin e fanang ka matla a maholo, thibelo ea khase le likarolo tse ling.