Twin-screw extruders sune injunan aikin doki a cikin filin hada-hadar, kuma mafi girman aikinsu da daidaitawa shine fa'idodin matsayinsu. Yana iya haɗuwa daban-daban additives da fillers don cimma daban-daban siffofin pellet da kaddarorin tare da daban-daban yi.
Yayin da za a iya sarrafa nau'o'in additives da fillers don extrusion, wasu hanyoyin samun waɗannan samfurori kuma na iya haifar da matsalolin gurɓatawa da ƙananan kwarara ko ƙananan matsa lamba a wurare da yawa a cikin ganga.
A cikin ci gaba da tsari kamar extrusion, gurɓatawa na iya yin mummunan tasiri. Tsarkakewa a cikin extrusion yakan zama mafi ƙalubale fiye da sauran matakai, kuma masu fitar da tagwaye suna fuskantar kalubale mafi girma saboda tsarin ya fi rikitarwa fiye da guda ɗaya.
Da farko, bari mu dubi hanyoyin tsaftacewa na tagwayen-screw extruders.
Hanyar tsaftacewar guduro:
Yin amfani da resin polyester ko resin epoxy don tsaftacewa ana amfani dashi gabaɗaya don tsaftace sabbin kayan aiki ko kuma bayan an yi amfani da extruder na ɗan lokaci, saboda wasu kayan sun kasance a kan dunƙule ko ganga da gel, saurin extrusion kayan yana raguwa, kuma launi. bambancin canjin launi iri-iri yana da girma. Ana iya amfani da wannan hanyar. A yau, tare da tattalin arzikin mawuyacin kwamfuta sosai, babu ƙarancin tsabtace masu ƙyalli (dunƙule tsabtatawa) a kasuwa, yawancinsu suna da tsada kuma suna da tasiri daban-daban.
Ko yin amfani da masu tsabtace kasuwanci ya dogara da masana'antun daban-daban da yanayin samarwa; Kamfanonin sarrafa filastik kuma na iya amfani da resins daban-daban azaman kayan tsaftacewa na dunƙule gwargwadon yanayin samar da nasu, wanda zai iya adana kuɗi da yawa don rukunin.
Mataki na farko na tsaftace dunƙule shine kashe filogin ciyarwa, wato, rufe tashar abinci a kasan hopper; sannan rage saurin dunƙulewa zuwa 15-25r/min kuma kula da wannan gudun har sai ruwan narke a ƙarshen ƙarshen mutuwa ya daina gudana. Ya kamata a saita zafin jiki na duk wuraren dumama ganga a 200 ° C. Da zarar ganga ya kai wannan zafin jiki, fara tsaftacewa nan da nan.
Dangane da tsarin extrusion (yana iya zama dole don cire mutun don rage haɗarin matsananciyar matsa lamba a gaban ƙarshen extruder), tsaftacewa dole ne mutum ɗaya ya yi: mai aiki yana lura da saurin gudu da jujjuyawa daga sashin kulawa. , kuma yana lura da matsa lamba na extrusion don tabbatar da cewa tsarin tsarin bai yi yawa ba. A yayin aiwatar da duka, yakamata a kiyaye saurin dunƙule cikin 20r/min. A cikin aikace-aikacen ƙananan matsi sun mutu, kar a cire shugaban mutu don tsaftacewa da farko. Tsaya kuma cire shugaban da ya mutu nan da nan lokacin da extrudate ya juyo gaba ɗaya daga aikin guduro zuwa resin tsaftacewa, sa'an nan kuma sake kunna dunƙule (gudun cikin 10r/min) don ƙyale resin tsaftacewa ya fita waje.
Jagorar rarrabawa:
1. Da hannu ƙara kayan wankewa daga tashar fitarwa har sai launin kayan da aka cire ya kasance daidai da na pellets kayan wankewa, dakatar da ciyarwa, komai kayan, kuma dakatar da juyawa na twin-screw extruder screw;
2. Bude dunƙule extruder mutu shugaban kuma fara tsaftacewa;
3. Juya tagwayen dunƙule extruder dunƙule da kuma cire Orifice farantin don fitar da ragowar kayan wanke a cikin ganga da kuma tsaftace Orifice farantin;
4. Tsaya kuma cire dunƙule don lura ko an tsaftace shi, kuma da hannu cire ragowar kayan da ke kan dunƙule. Sake shigar da dunƙule; ƙara sabon abu don zubar da ragowar kayan wanki a cikin ganga kuma dakatar da jujjuyawar dunƙule;
- Shigar da farantin bangon kuma mutu shugaban tagwayen-screw extruder don kammala aikin tsaftacewa na tagwayen-screw extruder.
Hanyar tsaftacewa ta wuta:
Yin amfani da wuta ko gasawa don cire robobin da aka gyara akan dunƙule shine hanya mafi dacewa kuma mafi inganci don sassan sarrafa filastik. Yi amfani da hurawa don tsaftace dunƙule nan da nan bayan amfani, saboda a wannan lokacin kullun yana ɗaukar zafi daga ƙwarewar aiki, don haka dunƙule Rarraba zafi har yanzu bai dace ba. Amma kada a yi amfani da harshen acetylene don tsaftace dunƙule. Zazzabi na harshen acetylene zai iya kaiwa 3000 ° C. Yin amfani da harshen wuta acetylene don tsaftace dunƙule ba kawai zai lalata kaddarorin ƙarfe na dunƙule ba, amma kuma yana tasiri sosai ga juriyar injin ɗin dunƙule.
Idan harshen acetylene ya koma launin shuɗi mai tsayi lokacin yin burodin wani yanki na dunƙule, yana nufin cewa tsarin ƙarfe na wannan ɓangaren na dunƙule ya canza, wanda zai haifar da raguwar juriya na wannan ɓangaren, har ma abin da ya faru na abrasion tsakanin anti-wear Layer da matrix. Bawon ƙarfe. Bugu da ƙari, dumama gida tare da harshen acetylene kuma zai haifar da zafi a gefe ɗaya na dunƙule, haifar da dunƙule don lanƙwasa. Yawancin sukurori an yi su da karfe 4140.HT kuma suna da juriya sosai, gabaɗaya cikin 0.03mm.
Madaidaicin dunƙule shine yawanci tsakanin 0.01mm. Lokacin da aka toya dunƙule kuma aka sanyaya shi da harshen acetylene, yawanci yana da wahala a dawo zuwa madaidaiciyar asali. Hanya madaidaiciya kuma mai inganci: Yi amfani da hurawa don tsaftace dunƙule nan da nan bayan amfani. Saboda dunƙule yana ɗaukar zafi daga tsarin sarrafawa a wannan lokacin, rarraba zafi na dunƙule har yanzu daidai yake.
Hanyar wanke ruwa:
Screw Wanke: Injin wanki mai cikakken atomatik yana amfani da makamashin motsi na jujjuyawar ruwa da ƙarfin jujjuyawar juzu'i don cimma tsiri-digiri 360 ba tare da matattun kusurwoyi ba. Yana da babban aiki yadda ya dace kuma baya lalata tsarin jiki na dunƙule. Yana gane sabuwar fasahar tsabtace dunƙule a cikin abokantaka na muhalli, inganci da hanyar ceton kuzari. Ya dace da ƙwanƙwasa tilastawa da kuma cire nau'ikan kayan polymer, don haka fasaha ce mai sarrafa kore tare da kyakkyawan sakamako mai tsabta.
Lokacin aikawa: Juni-07-2024