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Uyazazi zonke izici ezidala futhi zithonye ukucindezeleka kwangaphakathi emikhiqizweni ebunjiwe ngomjovo?
1. ukukhiqiza ukucindezeleka kwangaphakathi
Emikhiqizweni ebunjiwe ngomjovo, isimo sokucindezeleka sendawo sihlukile endaweni ngayinye, futhi izinga lokuguquguquka kwemikhiqizo lizonqunywa ukusatshalaliswa kokucindezeleka. Uma umkhiqizo upholile. Uma kukhona i-gradient yokushisa, lolu hlobo lokucindezeleka luzokhula, ngakho-ke lolu hlobo lokucindezeleka lubizwa nangokuthi "ukucindezeleka kokubumba".
Ake sibheke isingeniso se-umshini we-extrusion.
Kunezinhlobo ezimbili zamaphakheji okucindezeleka kwangaphakathi kwemikhiqizo ebunjiwe ngomjovo: enye ingcindezi yokubumba kanti enye ingcindezi yokushisa. Lapho ukuncibilika kungena esikhumbeni ekushiseni okuphansi, ukuncibilika eduze kodonga lwesikhala kuyaphola futhi kuqine ngesivinini esikhulu, ukuze izingxenye ze-molecule chain "ziqandiswe". Ngenxa yokushisa okungekuhle kwesendlalelo se-polymer esiqinisiwe, kudalwa i-gradient enkulu yokushisa ebheke ekujiyeni komkhiqizo. Inhliziyo yomkhiqizo iqina kancane kakhulu, kangangokuthi lapho isango livaliwe, iyunithi yokuncibilika ephakathi komkhiqizo ayikaqini, futhi umshini wokubumba umjovo awukwazi ukukhokhela ukuncishiswa kokupholisa.
Ngakho-ke ukuncishiswa kwangaphakathi komkhiqizo kuphambene nesenzo sesendlalelo sesikhumba esiqinile; ingaphakathi lisesimweni sokungaguquguquki kuyilapho isendlalelo sobuso sisesimweni sokucindezelwa okungaguquki.
Uma ukuncibilika kugcwalisa isikhunta futhi kugeleza, ngaphezu komphumela wokuncipha kwevolumu obangelwa ukucindezeleka. Kukhona futhi ukucindezeleka okubangelwa umphumela wokwandiswa kwe-runner kanye ne-gate outlet; umphumela wangaphambili ubangela ukucindezeleka okuhlobene nesiqondiso sokugeleza kokuncibilika, okwakamuva ngenxa yomphumela wokwandiswa kwe-outlet kuzobangela ukucindezeleka ohlangothini oluqondile nokugeleza.
2. Izici zenqubo ezithinta ukucindezeleka
(1) ngomphumela wokucindezeleka ezimweni zokupholisa okusheshayo, ukuqondiswa kuzoholela ekwakhekeni kokucindezeleka kwangaphakathi ku-polymer. Ngenxa yokuthambekela okuphezulu kokuncibilika kwe-polymer, ukucindezeleka kwangaphakathi akukwazi ukusheshe kukhululwe, okuthinta izakhiwo zomzimba kanye nokuqina kobukhulu bomkhiqizo.
Ithonya lamapharamitha ahlukahlukene ekucindezelekeni kokuqondiswa.
Izinga lokushisa lokuncibilika, izinga lokushisa eliphezulu lokuncibilika, i-viscosity ephansi, ukucindezeleka okuphansi kokucheba kanye nokuma okuncishisiwe; ngakolunye uhlangothi, izinga lokushisa eliphezulu lokuncibilika lizokwenza ukukhululeka kokucindezeleka kusheshe futhi kukhuthaze ikhono lokuqinisa ukungaqondi.
Kodwa-ke, ngaphandle kokushintsha ingcindezi yomshini wokubumba umjovo, ingcindezi yesikhala sesikhunta izokwanda futhi umphumela oqinile wokucheba uzoholela ekwandeni kokucindezeleka kokuqondiswa.
Ukwandisa isikhathi sokubamba kuze kube yilapho umlomo uvaliwe kuzoholela ekwandeni kokucindezeleka kokuqondiswa.
Ukwandisa ingcindezi yomjovo noma ukucindezela kokubamba kuzokwandisa ukucindezeleka kokuqondiswa.
Izinga lokushisa eliphezulu lesikhunta liqinisekisa ukuthi umkhiqizo uphola kancane futhi usebenza njengokungaqondi kahle.
Khulisa ukujiya komkhiqizo ukuze unciphise ukucindezeleka kokuqondiswa, ngoba imikhiqizo enezindonga ezijiyile iphola kancane, i-viscosity iyanda kancane, inqubo yokuphumula kokucindezeleka yesikhathi eside, ngakho-ke ukucindezeleka kokuqondiswa kuncane.
(2) Umphumela ekucindezelekeni kwezinga lokushisa
Njengoba kushiwo ngenhla, ngenxa yokushintsha kwezinga lokushisa phakathi kokuncibilika nodonga lapho kugcwaliswa isikhunta, ungqimba lwangaphandle lokuncibilika oluqina kuqala kufanele lusize ekumiseni ukuncibilika kongqimba lwangaphakathi lokuncibilika oluqina kamuva, okuholela ekucindezelekeni okucindezelekile (ukucindezeleka kokuncibilika) ongqimbeni lwangaphandle kanye nokucindezeleka kokuthamba (ukucindezeleka kokuqondiswa) ongqimbeni lwangaphakathi.
Uma isikhunta sigcwalisiwe bese sibanjwa ngaphansi kwengcindezi isikhathi eside, ukuncibilika kwe-polymer kwengezwa emgodini wesikhunta, okwandisa ingcindezi yesikhala, okushintsha ukucindezeleka kwangaphakathi ngenxa yokushisa okungalingani. Kodwa-ke, uma isikhathi sokubamba sifushane futhi ingcindezi yesikhala iphansi, umkhiqizo uzohlala usesimweni esifanayo sokucindezeleka njengalapho upholiswa.
Uma ingcindezi yesikhala sesikhunta inganele ekuqaleni kwenqubo yokupholisa, ungqimba lwangaphandle lomkhiqizo luzoncipha ngenxa yokuqina futhi lwakhe ukwehla; uma ingcindezi yesikhala sesikhunta inganele esigabeni esilandelayo lapho umkhiqizo usuwenze ungqimba oluqinile olubandayo, ungqimba lwangaphakathi lomkhiqizo luzohlukana ngenxa yokuncipha noma lwakhe umgodi; uma ingcindezi yesikhala sesikhunta igcinwa ngaphambi kokuba isango livalwe, kuzosiza ukwandisa ubuningi bomkhiqizo futhi kuqede ukucindezeleka kokushisa kokupholisa, kodwa kuzokhiqizwa ukuhlushwa okukhulu kokucindezeleka eduze kwesango.
Ngakho-ke kubonakala sengathi uma ingcindezi inkulu esikhumbeni, isikhathi sokubamba side, okuzosiza ukunciphisa ukucindezeleka kokuncipha okubangelwa izinga lokushisa futhi ngokuphambene nalokho kwandise ukucindezeleka kokucindezela.
3. Ubudlelwano phakathi kokucindezeleka kwangaphakathi kanye nekhwalithi yomkhiqizo
Ukuba khona kokucindezeleka kwangaphakathi kumkhiqizo kuzothinta kakhulu izakhiwo zemishini kanye nokusebenza komkhiqizo; ngenxa yokuba khona kanye nokusatshalaliswa okungalingani kokucindezeleka kwangaphakathi, umkhiqizo uzoqhekeka enkambisweni yokusebenzisa. Uma usetshenziswa ngaphansi kwezinga lokushisa lokushintsha kwengilazi, ukuguquguquka okungajwayelekile noma ukugoba kuvame ukwenzeka, okungabangela nokuthi ubuso bomkhiqizo bube “mhlophe” futhi bube namafu, kanye nezakhiwo zokukhanya ziwohloke.
Ukwehla kwezinga lokushisa esangweni kanye nokwenyuka kwesikhathi sokupholisa kuzosiza ekuthuthukiseni ukungalingani kokucindezeleka emkhiqizweni futhi kwenze izakhiwo zemishini zomkhiqizo zibe yinye.
Kuma-polymer acwebezelayo nalawo angewona acwebezelayo, amandla okudonsa ayinto eshisayo. Kuma-polymer angewona acwebezelayo amandla okudonsa ayahlukahluka kuye ngokuthi isango likuphi; lapho isango liseceleni elifanayo nokugcwaliswa kwesikhunta, amandla okudonsa ayancipha njengoba izinga lokushisa lokuncibilika likhuphuka; lapho isango liqonde ngqo esiqondisweni sokugcwaliswa kwesikhunta, amandla okudonsa ayanda njengoba izinga lokushisa lokuncibilika likhuphuka.
Ukwanda kwezinga lokushisa lokuncibilika kuholela ekwandeni kokungaqondi kahle kanye nokwehla kwamandla okudonsa ngenxa yokwehla kokuqondiswa. Ukuqondiswa kwesango kuthinta ukuqondiswa ngokuthonya isiqondiso sokugeleza, futhi ngenxa yokuthi ama-polymer angenasimo angcono kakhulu kune-polymers ekristalu, amandla okudonsa ohlangothini oluqondile nokugeleza makhulu kowokuqala kunalowo wokugcina. Ukujova kwezinga lokushisa eliphansi kune-anisotropy enkulu yomshini kunojova lokushisa eliphezulu, isib. isilinganiso samandla esiqondisweni esiqondile nesigelezayo singu-1.7 emazingeni okushisa aphezulu okujova kanye no-2 emazingeni okushisa aphansi okujova.
Kubonakala sengathi ukwanda kwezinga lokushisa lokuncibilika, kungakhathaliseki ukuthi kuma-polymer acwebezelayo noma angewona acwebezelayo, kuholela ekunciphiseni amandla okunamathela, kodwa ngendlela ehlukile; okokuqala kungenxa yomphumela onciphile ngokuqondiswa.
Okuqukethwe
Njengoba eseneminyaka ecishe ibe ngu-20 embonini yemishini yokukhipha izinto ezihlakaniphile, ubelokhu ephethe izindima ezibalulekile eJwell Machinery, okuhlanganisa noMphathi Jikelele kanye noSihlalo Ojikelezayo. Kusukela ngo-2024, uphathe izinkampani eziningi ezingaphansi kwakhe, eqhuba ukwanda kwebhizinisi kanye nokuthuthukiswa kwezimboni, ngenkathi ehola ukusungula izinto ezintsha ekukhiqizeni izinto ezihlakaniphile kanye nokukhula komhlaba wonke.
