Ama-extruder ama-twin-screw ayimishini esebenza kahle kakhulu emkhakheni wokuhlanganisa, futhi ukusebenza kwawo okuphezulu kanye nokwenza ngokwezifiso kuyinzuzo yesikhundla sawo. Angahlanganisa izithasiselo ezahlukene kanye nama-filler ukuze kufezwe izimo ezahlukene ze-pellet kanye nezakhiwo ngokusebenza okuhlukile.
Nakuba izithasiselo ezahlukahlukene kanye nezigcwalisi zingacutshungulwa ukuze zikhishwe, ezinye izindlela zokuthola le mikhiqizo zingaholela ezinkingeni zokungcola kanye nokugeleza okuphansi noma ingcindezi ephansi ezindaweni eziningi kulo lonke ibhakede.
Enqubweni eqhubekayo njengokukhipha, ukungcola kungaba nomphumela omubi. Ukukhipha i-extrusion kuvame ukuba yinselele kakhulu kunezinye izinqubo, futhi ama-extruder anezikulufo ezimbili abhekana nezinselele ezinkulu ngoba uhlelo luyinkimbinkimbi kakhulu kune-extruder enezikulufo eyodwa.
Okokuqala, ake sibheke izindlela zokuhlanza ze-extruder ezinezikulufo ezimbili.
Indlela yokuhlanza i-resin:
Ukusebenzisa i-polyester resin noma i-epoxy resin ekuhlanzeni ngokuvamile kusetshenziselwa ukuhlanza imishini emisha noma ngemva kokuba i-extruder isisetshenzisiwe isikhathi esithile, ngoba ezinye izinto zihlala ku-screw noma emgqonyeni kanye nejeli, ijubane lokukhipha izinto liyehla, futhi umehluko wombala wohlobo lokushintsha kombala mkhulu. Le ndlela ingasetshenziswa. Namuhla, ngomnotho wezimpahla othuthuke kakhulu, akukho ukushoda kwezinhlobo ezahlukene zokuhlanza izikulufo (izinto zokuhlanza izikulufo) emakethe, eziningi zazo ezibizayo futhi ezinemiphumela ehlukile.
Ukuthi kufanele kusetshenziswe yini izihlanzi zezentengiselwano kuncike kubakhiqizi abahlukene kanye nezimo zokukhiqiza; izinkampani zokucubungula ipulasitiki zingasebenzisa nama-resin ahlukene njengezinto zokuhlanza izikulufo ngokwezimo zazo zokukhiqiza, okungonga izindleko eziningi zeyunithi.
Isinyathelo sokuqala sokuhlanza isikulufu ukuvala ipulaki lokuphakelayo, okungukuthi, ukuvala imbobo yokuphakelayo phansi kwe-hopper; bese wehlisa isivinini sesikulufu sibe ngu-15-25r/min bese ugcina lesi sivinini kuze kube yilapho ukugeleza kokuncibilika ekugcineni kwedayi kuyeka ukugeleza. Izinga lokushisa lazo zonke izindawo zokushisa zebhareli kufanele libekwe ku-200°C. Uma ibhareli selifinyelele kuleli zinga lokushisa, qala ukuhlanza ngokushesha.
Kuye ngenqubo yokukhipha (kungadingeka ukususa idayisi ukuze kuncishiswe ingozi yokucindezela ngokweqile engxenyeni engaphambili ye-extruder), ukuhlanza kumele kwenziwe ngumuntu oyedwa: umqhubi uqaphela isivinini sesikulufu kanye ne-torque evela kuphaneli yokulawula, futhi uqaphela ingcindezi yokukhipha ukuqinisekisa ukuthi ingcindezi yesistimu ayiphezulu kakhulu. Phakathi nayo yonke inqubo, isivinini sesikulufu kufanele sigcinwe ngaphakathi kwama-20r/min. Lapho kusetshenziswa amakhanda esikulufu anengcindezi ephansi, ungasusi ikhanda lesikulufu ukuze uhlanze kuqala. Misa bese ususa ikhanda lesikulufu ngokushesha lapho i-extrudate iguqulwa ngokuphelele kusuka ekucubunguleni i-resin ibe yi-resin yokuhlanza, bese uqala kabusha isikulufu (isivinini ngaphakathi kwama-10r/min) ukuze uvumele i-resin yokuhlanza esele iphume.
Umhlahlandlela wokudiliza:
1. Faka izinto zokuwasha ngesandla kusukela endaweni yokukhipha kuze kube yilapho umbala womugqa wezinto ezikhishwe ufana nowama-pellets ezinto zokuwasha, yeka ukuphakela, khipha izinto, bese umisa ukujikeleza kwesikulufu sokukhipha esinezikulufo ezimbili;
2. Vula ikhanda le-screw extruder die bese uqala ukuhlanza;
3. Phendula isikulufu sokuphuma esinezikulufo ezimbili bese ususa ipuleti le-orifice ukuze ukhiphe izinto zokuwasha ezisele emgqonyeni bese uhlanza ipuleti le-orifice;
4. Misa bese ukhipha isikulufu ukuze ubone ukuthi sihlanziwe yini, bese ususa ngesandla izinto ezisele esikulufini. Faka kabusha isikulufu; engeza izinto ezintsha ukuze ugeze izinto ezisele esikulufini bese umisa ukuzungeza kwesikulufu;
- Faka ipuleti le-orifice kanye nekhanda le-die le-extruder enama-twin screw ukuze uqedele umsebenzi wokuhlanza i-extruder enama-twin screw.
Indlela yokuhlanza ebhakwe ngomlilo:
Ukusebenzisa umlilo noma ukuthosa ukuze ususe ipulasitiki eboshwe esikulufini kuyindlela evame kakhulu futhi ephumelelayo yamayunithi okucubungula ipulasitiki. Sebenzisa i-blowtorch ukuze uhlanze isikulufi ngokushesha ngemva kokusebenzisa, ngoba ngalesi sikhathi isikulufi sithwala ukushisa okuvela kokuhlangenwe nakho kokucubungula, ngakho-ke isikulufi Ukusatshalaliswa kokushisa kusafana. Kodwa ungalokothi usebenzise ilangabi le-acetylene ukuhlanza isikulufi. Izinga lokushisa lelangabi le-acetylene lingafinyelela ku-3000°C. Ukusebenzisa ilangabi le-acetylene ukuhlanza isikulufi ngeke kubhubhise kuphela izakhiwo zensimbi zesikulufi, kodwa futhi kuzothinta kakhulu ukubekezelelana kwemishini kwesikulufi.
Uma ilangabi le-acetylene liphenduka umbala oluhlaza okwesibhakabhaka oqhubekayo lapho kubhakwa ingxenye ethile yesikulufu, kusho ukuthi isakhiwo sensimbi sale ngxenye yesikulufu sishintshile, okuzoholela ekunciphiseni ukumelana nokuguguleka kwale ngxenye, ngisho nokuvela kokuguguleka phakathi kwengqimba yokulwa nokuguguleka kanye ne-matrix. Ukuqhekeka kwensimbi. Ngaphezu kwalokho, ukushisa kwendawo ngelangabi le-acetylene kuzophinde kubangele ukushisa kakhulu kolunye uhlangothi lwesikulufu, okubangela ukuba isikulufu sigobe. Izikulufu eziningi zenziwe ngensimbi engu-4140.HT futhi zinokubekezelelana okuqinile kakhulu, ngokuvamile ngaphakathi kuka-0.03mm.
Ukuqondile kwesikulufu kungaphakathi kakhulu kwe-0.01mm. Uma isikulufu sibhakwa futhi sipholiswa ilangabi le-acetylene, kuvame ukuba nzima ukubuyela ekuqondeni kwasekuqaleni. Indlela efanele nephumelelayo: Sebenzisa i-blowtorch ukuhlanza isikulufu ngokushesha ngemva kokusebenzisa. Ngenxa yokuthi isikulufu sithwala ukushisa okuvela enkambisweni yokucubungula ngalesi sikhathi, ukusatshalaliswa kokushisa kwesikulufu kusafana.
Indlela yokuwasha ngamanzi:
Ukuwasha izikulufo: Umshini wokuwasha izikulufo ozenzakalelayo ngokuphelele usebenzisa amandla okujika kwamanzi kanye namandla okusabela okujika kwezikulufo ukuze kufezwe ukukhumula okungu-360-degree ngaphandle kwama-engeli afile. Usebenza kahle kakhulu futhi awulimazi isakhiwo somzimba sesikulufo. Usebenzisa ubuchwepheshe obusha bokuhlanza izikulufo ngendlela enobungani nemvelo, esebenza kahle futhi eyonga amandla. Ufanele ukukhumula ngenkani nokususa izinto ezahlukahlukene ze-polymer, ngakho-ke uwubuchwepheshe bokucubungula obuluhlaza obunomphumela omuhle wokuhlanza.
Isikhathi sokuthunyelwe: Juni-07-2024