Njengesixhobo esingundoqo kwishishini lokulungisa iiplastiki, ukusebenza kwe-extruder yeplastiki kuchaphazela ngokuthe ngqo umgangatho wemveliso, ukusebenza kakuhle kwemveliso, kunye nobomi besixhobo. Ubuchule bokusebenza obusebenzayo akuncedi kuphela iinkqubo zemveliso kodwa kunciphisa ukusetyenziswa kwamandla kunye neendleko zokugcina. Oku kulandelayo kuchaza iingcebiso ezisebenzayo zokusebenzisa i-extruder yeplastiki ukusuka kwiimbono ezininzi eziphambili.
1. Phambi{1}}uLungiselelo loQalo
Uhlolo lwangaphambili{0}}lubalulekile ekuqinisekiseni ukhuseleko nokusebenza kakuhle. Okokuqala, qinisekisa ukoma kwezinto eziluhlaza. Iimathiriyeli zeHygroscopic (ezifana ne-PET kunye nenayiloni) kufuneka zomiswe kwindawo yokomisa kumxholo wokufuma ongaphantsi komgangatho ochaziweyo. Ukungaphumeleli ukwenza oko kunokukhokelela kwiingxaki ezinjengamaqamza kunye nokunciphisa amandla. Okwesibini, susa nayiphi na into eseleyo yangaphandle okanye iiplastiki ezixubeneyo kwi-hopper kunye nesikrufu ukunqanda ungcoliseko. Inkqubo yokuthambisa kunye nemigca yamanzi okupholisa kufuneka iqale isebenze{6}}ukukhangela inqanaba le-oyile, ubushushu bamanzi, kunye nemibhobho ukunqanda umonakalo ekutshiseni ngokugqithisileyo okanye ukungqubana ngexesha lokusebenza. Ngaphaya koko, isithuba sokufa kunye nobushushu bekhoyili yesifudumezi kufuneka luhlengahlengiswe ngokweemfuno zemveliso. Ngokuqhelekileyo, umgqomo kufuneka ufudumale kwi-30 ukuya kwimizuzu engama-60 kwangaphambili ukuze kuqinisekiswe ukuba onke amacandelo afikelela kwiqondo lokushisa elizinzileyo (umzekelo, umgangatho wokushisa oqhelekileyo we-PE yi-160 ukuya kwi-200 degree).
2. Ukutya kunye neScrew Control Control
Umlinganiselo wesondlo kufuneka uhambelane nesantya sokujija ukuphepha ukutyisa ngaphantsi okanye ukugcwala. Ukuba isantya sokutya sikhawuleza kakhulu, ukonyuka ngequbuliso koxinzelelo kwincam yesijiva kunokukhokelela kumthwalo omninzi wemoto okanye ukukhutshwa okungalinganiyo. Ukuba isantya sokutya sicotha kakhulu, ukucheba nokungonelanga kunokuthi kwenzeke, okuchaphazela umgangatho weplastiki. Kunconywa ukuba ulungelelanise ngokuguquguqukayo isantya se-screw ngokuqwalasela imitha yangoku (ixesha eliqhelekileyo lokusebenza kufuneka libe ngaphantsi kwe-80% yexabiso elilinganisiweyo) kunye nokufana kokukhutshwa. Kwizinto eziphezulu - ze-viscosity (ezifana ne-PC kunye ne-ABS), isantya sinokuncitshiswa ngokufanelekileyo kwaye ixesha lokuhlala linyuswe ukuqinisekisa iplastiki eyaneleyo. Kwizinto eziphantsi{7} ze-viscosity (ezifana ne-PP kunye ne-LDPE), isantya sinokunyuswa ukwandisa imveliso. Kwakhona, kunqande ukukhawulezisa ngequbuliso okanye ukuncipha ukuze uthintele ukuhamba kwezinto ezingazinzanga ngaphakathi kombhobho.
3. Ubushushu obuchanekileyo kunye noLawulo loxinzelelo
Ubushushu yiparameter engundoqo kwi-extrusion yeplastiki kwaye kufuneka ilawulwe ngezigaba ngokusekelwe kwiimpawu zezinto eziphathekayo. Umzekelo, xa kusetyenzwa i-PVC, iqondo lobushushu kwicandelo lesondlo ngokuqhelekileyo lingaphantsi kwelo likwicandelo lokunyibilika (ukunqanda ukubola kwangaphambi kwexesha). Ukushisa kumacandelo okunyibilika kunye ne-homogenization kufuneka kwandiswe ngokuthe ngcembe ukuya kwi-180-210℃ukuze kuqinisekiswe iplastiki efanayo. Ulawulo loxinzelelo luxhomekeke kuyilo lokungunda kunye nokumelana nokufa. Uxinzelelo oluphezulu kakhulu lunokukhokelela ngokulula ekunxityweni kwezixhobo okanye ukugqabhuka kwetyhubhu, ngelixa uxinzelelo oluphantsi kakhulu lunokubangela ukusilela kwemveliso kunye nemigangatho erhabaxa. Ngexesha lokusebenza, uxinzelelo lwasemva lwe-screw lunokulungelelaniswa (ngokubanzi ngaphakathi koluhlu lwe-0.5-2 MPa) ukunyusa ubuninzi be-melting, ngelixa uqwalasela uluhlu lokuguquguquka kwe-pressure gauge. Uxinzelelo oluzinzileyo lungundoqo kwimilinganiselo yemveliso engaguqukiyo.
IV. Ukuvalwa kunye neMiqathango yoLondolozo
Phambi kokuvalwa, nciphisa kancinci isantya se-screw kwaye ukhuphe umgqomo wayo nayiphi na imathiriyeli eseleyo (ingakumbi ubushushu-izinto ezibuthathaka ezifana ne-PVC, ekufuneka itshintshwe ngesixhobo sokucoca esifana ne-PE ukunqanda i-carbonization). Ngexesha elongeziweyo lokuphumla, vala isixokelelwano sokufudumeza kwaye ucoce nayiphi na imathiriyeli eseleyo kwimold kunye ne-screw surface ukukhusela i-oxidation okanye ukuhlwa. Ngexesha lokugcinwa kwesiqhelo, gxila ekuhloleni ukunxiba kwesikrufu kunye nomgqomo (ukutshintshwa kuyafuneka ukuba ukucocwa kungaphezulu kwe-15% yomgangatho wokuqala), ukusebenza kwe-insulation yee-coil zokufudumeza, kunye nomgangatho weoyile yebhokisi yegiya kwinkqubo yothumelo. Ukutshintsha rhoqo isihluzi (kucetyiswa ngalo lonke utshintsho okanye ngokusekwe kumgangatho wemveliso) kubamba ukungcola kwaye kuqinisekise ukunyibilika.
Ukuqukumbela
Ukusebenzisa i-extruder yeplastiki sikhono esidibanisa ithiyori kunye nokusebenza. Ukusuka{1}kumalungiselelo emveliso ukuya kwinkqubo yolawulo kunye nolondolozo olulandelayo, ingqalelo ecokisekileyo kwiinkcukacha kwinqanaba ngalinye lichaphazela isiphumo sokugqibela. Abaqhubi kufuneka bahlengahlengise iiparamitha ngokuguquguqukayo ngokusekelwe kwiipropati eziphathekayo, iimfuno zemveliso, kunye nesimo sesixhobo. Ngokuqokelela amava aqhubekayo kunye nokusebenza okusemgangathweni, iinjongo zemveliso ezisebenzayo nezizinzileyo zinokufezekiswa.
