Molao-motheo oa tlhahiso ea lisebelisoa tsa ho bopa tse nang le sekoti le mokhoa oa eona oa ho bopa Seo ho thoeng ke mochini oa ho bopa o bitsoang blow blow molding mochini o boetse o bitsoa mochini o bopang o sekoti.Polasetiki e qhibilihisoa 'me e ntšitsoe ka bongata ka har'a screw extruder, ebe e thehoa ka filimi ea molomo, ebe e pholile ka selikalikoe sa moea, ebe e phunyeletsoa ka har'a hlobo.Mokhoa o ntseng o hola ka potlako oa ho lokisa lipolasetiki.Parison ea polasetiki e nang le tubula e fumanoeng ka extrusion kapa ente ea resin ea thermoplastic e behiloe ka har'a hlobo e arohaneng ha e ntse e chesa (kapa e futhumetse ho fihlela boemong bo bonolo), 'me moea o hatelitsoeng o kenngoa ka har'a parison hang ka mor'a ho koala hlobo ho letsa parison ea polasetiki. .E atoloha mme e khomarela haufi le lerako le ka hare la hlobo, 'me ka mor'a ho pholile le ho senya, lihlahisoa tse sa tšoaneng tse sekoti li fumanoa.
Mochini oa ho bopa o ile oa qala ho sebelisoa ho hlahisa linkho tsa polyethylene tse tlase haholo nakong ea Ntoa ea II ea Lefatše.Ho elella bofelong ba lilemo tsa bo-1950, ka ho tsoaloa ha polyethylene e phahameng haholo le nts'etsopele ea mechine ea ho bopa, ho ne ho sebelisoa haholo theknoloji ea mechine ea ho bopa.Bophahamo ba linkho tse sekoti bo ka fihla lilithareng tse likete, 'me tlhahiso e 'ngoe e laoloa ke lik'homphieutha.Lipolasetiki tse loketseng ho bopa li kenyelletsa polyethylene, polyvinyl chloride, polypropylene, polyester, joalo-joalo, 'me lijana tse se nang letho tse fumanoeng li sebelisoa haholo joalo ka lijana tsa ho paka tsa indasteri.
Kenyelletso ea mokhoa oa ho bopa oa ho etsa sekoti:
Ka lebaka la phapang ea thepa e tala, litlhoko tsa ts'ebetso, tlhahiso le litšenyehelo, mekhoa e fapaneng ea ho bopa e na le melemo e fapaneng ea ho sebetsana le lihlahisoa tse fapaneng.
Ho bopa ha lihlahisoa tse se nang letho ho kenyelletsa mekhoa e meraro ea mantlha:
1. Extrusion blow molding: haholo-holo e sebelisetsoang ts'ebetso ea parison e sa tšehetsoeng;
2. Ente e otlang ho bōptjoa: haholo-holo e sebelisoang bakeng sa ts'ebetso ea parison e tšehetsoeng ke motheo oa tšepe;
3. Ho bopa ho otlolla ho otlolla: ho kenyelletsa ho bopa ha extrusion-stretch-blow, ho bopa ka mokhoa oa ente-ho otlolla mekhoa e 'meli, ho ka sebetsana le lihlahisoa tse shebaneng le biaxially, ho fokotsa haholo litšenyehelo tsa tlhahiso le ho ntlafatsa ts'ebetso ea sehlahisoa.
Ho phaella moo, ho na le mefuta e mengata ea li-layer blowing, compression blow molding, dip coating coating, foam blow molding, three-dimensional blow molding, joalo-joalo Empa 75% ea lihlahisoa tsa ho bopa ke extrusion blow molding, 24% ke ente blow , 'me 1% ke mefuta e meng ea ho bopa;har'a lihlahisoa tsohle tsa ho bopa, 75% ke ea lihlahisoa tse shebaneng le biaxially.Melemo ea ho bopa ha extrusion blowing ke ts'ebetso e phahameng ea tlhahiso, theko e tlase ea lisebelisoa, khetho e pharaletseng ea hlobo le mochini, 'me mefokolo ke sekhahla se phahameng sa sekhechana, ts'ebeliso e mpe ea ts'ebeliso ea sekhechana, taolo ea botenya ba sehlahisoa le ho senyeha ha thepa.Ka mor'a moo, ho hlokahala ho etsa ts'ebetso ea ho fokotsa.Molemo oa ho bōptjoa ha ente ke hore ha ho na litšila ts'ebetsong ea ts'ebetso, 'me botenya ba lerako la sehlahisoa le ho hasana ha thepa ho ka laoloa hantle.Bothata ke hore thepa ea ho bopa e theko e boima 'me ho isa tekanyong e itseng e loketse feela lihlahisoa tse nyenyane tse bōpiloeng.
Maemo a ts'ebetso ea ho bopeha ha sekoti a hloka hore moea o hatelitsoeng o kenyang parison ka har'a hlobo o tlameha ho hloeka.Khatello ea moea bakeng sa ho bōptjoa ha ente ke 0.55 ho 1 MPa;khatello ea ho bōptjoa ha extrusion blown ke 0.2l ho 0.62 MPa, 'me khatello ea ho otlolla ho otloloha hangata e hlokahala hore e be holimo ho 4 MPa.Ha ho tiisoa ha li-plastiki, khatello e tlaase e etsa hore khatello ea ka hare ea sehlahisoa e fokotsehe, khatello ea khatello ea kelello e fapane haholo, 'me khatello e tlaase e ka ntlafatsa ho tsitsisa, tšusumetso, ho khumama le lintho tse ling tsa sehlahisoa.
Nako ea poso: Nov-21-2023