Screw shine mafi mahimmancin sashi naextruder, za'a iya cewa shine zuciyar mai cirewa, zai iya tasiri kai tsaye ga aikace-aikace na extruder da ingantaccen samarwa.Ayyukan dunƙule yana ƙayyade yawan aiki, ingancin filastik, tarwatsewar filler, narke zafin jiki da yawan wutar lantarki na extruder.
Screw shine mafi mahimmancin ɓangaren extruder, za'a iya cewa shine zuciyar mai fitar da wutar lantarki, zai iya tasiri kai tsaye ga aikace-aikacen extruder da ingantaccen samarwa.Ayyukan dunƙule yana ƙayyade yawan aiki, ingancin filastik, tarwatsewar filler, narke zafin jiki da yawan wutar lantarki na extruder.Ta hanyar jujjuyawar dunƙule, dapolymer filastik za a iya extruded, kuma filastik na iya motsawa, matsawa da samun zafi daga gogayya a cikin silinda.A lokacin motsi na Silinda, ana iya haɗa filastik da filastik.
- 1.The dunƙule tsarin na polymer plasticizing da hadawa extruder.
A lokacin aiki, lokacin da kayan ke motsawa gaba tare da dunƙule, yana fuskantar canje-canje a yanayin zafi, matsa lamba, danko, da dai sauransu, wanda ya bambanta a cikin cikakken tsayin tsayin daka.Akwai jihohi uku na zahiri na filastik polymer a cikin extruder: yanayin gilashi, babban yanayin roba da yanayin kwararar danko.Don daidaitawa da buƙatun jihohi daban-daban kuma bisa ga canje-canjen halaye na kayan, za'a iya raba dunƙule zuwa sassa uku: sashin abinci, sashin damfara da sashin homogenize.Ayyukan sashin ciyarwa shine ciyar da kayan da hopper ke bayarwa zuwa sashin matsawa.Yayin motsi na filastik, gabaɗaya ya kasance mai ƙarfi kuma yana narkewa saboda zafi.Tsawon sashin ciyarwa ya bambanta da nau'in filastik.Sashin matsawa (sashin canja wuri) shine rawar da ake samu na matsa lamba na jiki, don haka abu daga m zuwa narke, da kyau daga iska a cikin kayan;Don daidaitawa da halaye na rage ƙararrawa lokacin tura gas a cikin kayan baya zuwa sashin ciyarwa, danna kayan aiki da narke kayan, dunƙule a cikin wannan sashe ya kamata ya haifar da sakamako mai girma da kuma matsawa na filastik.Ayyukan sashin homogenizing (sashin mita) shine ciyar da narkakkar kayan zuwa kan injin a koyaushe ƙara (ƙara) da matsa lamba ta yadda ya kasance a cikin ƙurar baki.Ƙararren tsagi mai karkace a cikin sashin homogenizing daidai yake da wanda ke cikin sashin ciyarwa.
Don guje wa riƙe kayan abu a ƙarshen kusurwar mataccen mataccen mataccen, haifar da bazuwar, shugaban dunƙule sau da yawa ana tsara shi cikin mazugi ko semicircle;Wasu dunƙule homogenization sashe ne – saman ne gaba daya santsi jiki da ake kira torpedo kai, amma akwai kuma kwarzana tsagi ko milling alamu.Shugaban torpedo yana da aikin motsa jiki da sarrafa kayan, kawar da abin da ya faru a cikin ruwa (pulsating) a cikin kwarara, rage kauri daga cikin kayan Layer tare da ƙara matsa lamba na kayan, inganta yanayin dumama, da kuma ƙara haɓaka aikin filastik. .Bisa ga narke kai ka'idar, narke gudãna a cikin dunƙule homogenization sashe a cikin hudu siffofin, da ya kwarara na narkakkar abu a cikin dunƙule tsagi ne hade da wadannan hudu gudana: tabbatacce kwarara - filastik narkewa tsakanin Silinda da dunƙule a cikin shugabanci. na dunƙule tsagi zuwa ga inji shugaban.Madaidaicin magudanar ruwa na yanzu yana kishiyar madaidaicin kwarara, wanda ke faruwa ta hanyar matsi mai matsatsi da ke haifar da juriya na hanci, faranti mai laushi da farantin tacewa.Gudun narke a cikin wata hanya madaidaiciya zuwa bangon zaren yana rinjayar haɗuwa da musayar zafi na narkewa yayin extrusion.Leakage kwarara - koma baya da aka samu ta hanyar matsa lamba tsakanin dunƙule da silinda, tare da axial shugabanci na dunƙule.Daban-daban nau'ikan yawo suna da tasiri mai mahimmanci akan haɗaka iri ɗaya na polymers.
Diamita na dunƙule da ƙayyadaddun tsarin tsari, galibi bisa ga samar da fitarwar samfur, ƙayyadaddun bayanai, nau'ikan kayan sarrafawa da halaye daban-daban na tsarin dunƙule don tantancewa.Gabaɗaya, sashin ciyarwa na dunƙule yana da rami mai zurfi kuma zurfin ragi bai canza ba, sashin matsawa (sashe narke) na zurfafa zurfin zurfafawa tare da jagorar fitarwa daga zurfin zuwa mara zurfi, sashin metering (sashe homogenized) na dunƙule. yana da tsagi mara zurfi kuma zurfin tsagi baya canzawa.
- 2.A dunƙule abu.
Dunƙule shi ne babban ɓangare na extruder, kamar yadda abu na dunƙule dole ne high zafin jiki juriya, sa juriya, lalata juriya, high ƙarfi da sauran halaye, a lokaci guda ya kamata da kyau yankan yi, zafi magani saura danniya, kananan thermal nakasawa da kuma sauran halaye.Don kayan dunƙule extruder, akwai takamaiman buƙatu kamar haka:
- (1) .High inji Properties.Don samun isasshen ƙarfi, don daidaitawa zuwa babban zafin jiki, yanayin aiki mai ƙarfi, inganta rayuwar sabis na dunƙule.
- (2).Kyakkyawan aikin injina.Kyakkyawan aikin inji da aikin maganin zafi.
- (3) Kyakkyawan lalata da juriya.
- (4) Mai sauƙin zana.
Lokacin aikawa: Yuli-15-2019