Li-extruder tse peli ke mechine e sebetsang tšimong e kopanyang, 'me ts'ebetso ea bona e phahameng le ho ikemela ke melemo ea boemo ba bona. E ka kopanya li-additives le li-filler tse fapaneng ho fihlela libopeho tse fapaneng tsa pellet le thepa e nang le ts'ebetso e fapaneng.
Le hoja mefuta e fapaneng ea li-additives le li-fillers li ka sebetsoa bakeng sa extrusion, mekhoa e meng ea ho fumana lihlahisoa tsena e ka boela ea lebisa litabeng tsa tšilafalo le phallo e tlaase kapa khatello e tlaase libakeng tse ngata ho pholletsa le barrel.
Ts'ebetsong e tsoelang pele joalo ka extrusion, tšilafalo e ka ba le phello e mpe. Ho hloekisa ka extrusion ho atisa ho ba phephetso ho feta mekhoa e meng, 'me li-extruder tse peli-screw li tobana le mathata a maholo hobane tsamaiso e rarahane ho feta extruder e le' ngoe.
Taba ea pele, a re shebeng mekhoa ea ho hloekisa ea li-fahla-screw extruder.
Mokhoa oa ho hloekisa resin:
Ho sebelisa resin ea polyester kapa resin ea epoxy bakeng sa ho hloekisa hangata e sebelisetsoa ho hloekisa lisebelisoa tse ncha kapa ka mor'a hore extruder e sebelisoe ka nako e itseng, hobane lisebelisoa tse ling li lula holim'a screw kapa barrel le gel, lebelo la extrusion le fokotseha butle, 'me mmala. phapang ea mmala phetoho mefuta e fapaneng e kholo. Mokhoa ona o ka sebelisoa. Kajeno, ka moruo oa thepa o tsoetseng pele haholo, ha ho na khaello ea li-screw cleaners (lisebelisoa tsa ho hloekisa li-screw) 'marakeng, tseo boholo ba tsona li theko e boima ebile li na le liphello tse fapaneng.
Hore na ho sebelisoa lihloekisi tsa khoebo ho ipapisitse le bahlahisi ba fapaneng le maemo a tlhahiso; lik'hamphani tse sebetsanang le polasetiki le tsona li ka sebelisa li-resin tse fapaneng e le lisebelisoa tsa ho hloekisa li-screw ho latela maemo a tsona a tlhahiso, tse ka bolokang litšenyehelo tse ngata bakeng sa yuniti.
Mohato oa pele oa ho hloekisa screw ke ho tima plug ea phepelo, ke hore, ho koala sekepe sa phepelo ka tlase ho hopper; joale fokotsa lebelo la screw ho 15-25r / min 'me u boloke lebelo lena ho fihlela ho phalla ho qhibiliha karolong e ka pele ea lefu ho emisa ho phalla. Mocheso oa libaka tsohle tsa ho futhumatsa tsa barrel o lokela ho behoa ho 200 ° C. Hang ha moqomo o fihla mocheso ona, qala ho hloekisa hang-hang.
Ho itšetlehile ka ts'ebetso ea extrusion (ho ka 'na ha hlokahala hore ho tlosoe lefu ho fokotsa kotsi ea khatello e feteletseng karolong e ka pele ea extruder), ho hloekisa ho tlameha ho etsoa ke motho a le mong: opereishene e shebile lebelo la screw le torque ho tloha phanele ea taolo. , le ho shebella khatello ea extrusion ho netefatsa hore khatello ea tsamaiso ha e phahame haholo. Nakong ea ts'ebetso eohle, lebelo la screw le lokela ho bolokoa ka hare ho 20r / min. Tšebelisong ea li-die heads tse nang le khatello e tlaase, u se ke ua tlosa hlooho ea lefu bakeng sa ho hloekisa pele. Emisa 'me u tlose hlooho ea lefu hang-hang ha extrudate e fetoloa ka ho feletseng ho tloha ho sebetsa resin ho hloekisa resin, ebe o qala hape screw (lebelo ka hare ho 10r / min) ho lumella resin ea ho hloekisa e setseng hore e phalle.
Tataiso ea ho qhaqha:
1. Ka letsoho eketsa lisebelisoa tsa ho hlatsoa ho tloha boema-kepe ba ho lahla ho fihlela 'mala oa thepa e fetisitsoeng e tšoana le ea li-pellets tsa thepa ea ho hlatsoa, emisa ho fepa, e tšolle lintho tse bonahalang,' me u emise ho potoloha ha sekoti sa twin-screw extruder;
2. Bula "screw extruder die head" 'me u qale ho hloekisa;
3. Fetolela screw extruder screw 'me u tlose orifice plate ho qhalla lisebelisoa tse setseng tsa ho hlatsoa ka har'a barrel le ho hloekisa poleiti ea orifice;
4. Emisa 'me u ntše screw ho bona hore na e hloekisitsoe,' me ka letsoho u tlose lisebelisoa tse setseng holim'a screw. Kenya screw hape; eketsa lisebelisoa tse ncha ho hlatsoa lisebelisoa tse setseng tsa ho hlatsoa ka har'a barrel le ho emisa ho potoloha ha screw;
- Kenya orifice plate 'me u shoe hlooho ea twin-screw extruder ho phethela ts'ebetso ea ho hloekisa ea twin-screw extruder.
Mokhoa oa ho hloekisa ka mollo:
Ho sebelisa mollo kapa ho besa ho tlosa polasetiki e tsitsitseng holim'a screw ke mokhoa o tloaelehileng ka ho fetisisa le o sebetsang bakeng sa likarolo tsa ho lokisa polasetiki. Sebelisa blowtorch ho hloekisa screw hang ka mor'a ho sebelisoa, hobane ka nako ena screw e jara mocheso ho tloha phihlelo ea ho sebetsa, kahoo screw Kabo ea mocheso e ntse e tšoana. Empa le ka mohla u se ke ua sebelisa lelakabe la acetylene ho hloekisa screw. Mocheso oa lelakabe la acetylene o ka fihla ho 3000 ° C. Ho sebelisa lelakabe la acetylene ho hloekisa screw ho ke ke ha senya feela thepa ea tšepe ea screw, empa hape ho ama haholo mamello ea mochini oa screw.
Haeba lelakabe la acetylene le fetoha 'mala o moputsoa o tsitsitseng ha o baka karolo e itseng ea screw, ho bolela hore mohaho oa tšepe oa karolo ena ea screw o fetohile, e leng se tla lebisa ho fokotseng ho hanyetsa ho apara ha karolo ena, esita le ho ba teng ha ho soahlamana pakeng tsa lera le kgahlano le ho roala le matrix. Ho ebola tšepe. Ho phaella moo, ho futhumatsa sebakeng se nang le lelakabe la acetylene ho tla boela ho baka ho chesa ka lehlakoreng le leng la screw, ho etsa hore screw e kobehe. Li-screws tse ngata li entsoe ka tšepe ea 4140.HT 'me li na le mamello e thata haholo, ka kakaretso ka hare ho 0.03mm.
Ho otloloha ha screw hangata ho ka har'a 0.01mm. Ha screw e apehile 'me e pholile ke lelakabe la acetylene, hangata ho thata ho khutlela ho otlolohileng ha pele. Mokhoa o nepahetseng le o sebetsang: Sebelisa blowtorch ho hloekisa screw hang kamora ho sebelisoa. Hobane screw e jara mocheso ho tloha ts'ebetsong ka nako ena, kabo ea mocheso ea screw e ntse e tšoana.
Mokhoa oa ho hlatsoa metsi:
Ho hlatsoa li-screw: Mochini o hlatsoang li-screw ka botlalo o sebelisa matla a kinetic a ho potoloha ha metsi le matla a karabelo ea screw rotation ho fihlela 360-degree stripping ntle le li-angles tse shoeleng. E na le ts'ebetso e phahameng ea ts'ebetso mme ha e senye sebopeho sa 'mele sa screw. E hlokomela thekenoloji e ncha ea ho hloekisa likoti ka tsela e baballang tikoloho, e sebetsang hantle le e baballang matla. E loketse ho hlobolisoa ho qobelloa le ho tlosoa ha mefuta e sa tšoaneng ea polymer, kahoo ke theknoloji e tala ea ho sebetsa e nang le phello e ntle ea ho hloekisa.
Nako ea poso: Jun-07-2024