yini ethinta ukwehluleka kokubumba umjovo ngokunemba

Isisekelo sokwahlulela ukunemba umjovo udini ukunemba kwemikhiqizo ebunjwe ngomjovo, leyo, ukubekezelelana kwe-dimensional, ukubekezelelana kwejiyomethri kanye nobulukhuni bobuso bemikhiqizo.

Ukwenza ukubumba komjovo ngokunemba, kufanele kube nemibandela eminingi efanele, futhi okubaluleke kakhulu yizici ezine eziyisisekelo zezinto zepulasitiki, imijovo isikhunta, inqubo yokubumba umjovo kanye nemishini yokubumba umjovo.

Lapho uklama imikhiqizo yepulasitiki, ubunjiniyela izinto zepulasitiki kufanele kukhethwe kuqala, kanye namapulasitiki obunjiniyela angabunjwa umjovo ngokunemba kufanele akhethe lezo zinto ezinezakhiwo eziphakeme zomshini, ukuzinza kwe-dimensional, ukumelana okuhle kwe-creep, kanye nokumelana nokuqhekeka kokucindezeleka kwemvelo.

Okwesibili, ezifanele umshini wokubumba umjovo we-china kufanele kukhethwe ngokusho kwepulasitiki ekhethiwe, ukunemba komkhiqizo okuqediwe, isisindo sengxenye, Izidingo zekhwalithi kanye nesakhiwo sokubumba esilindelekile.

Enqubweni yokucubungula, Izici ezithinta imijovo yokuhlobisa ukujovelwa ngokukhethekile ngokunemba kokubumba, umjovo shrinkage, kanye nobubanzi bezinguquko ekushiseni kwemvelo kanye nomswakama womkhiqizo.

Ngokunemba umjovo udini, Isikhunta kungenye yezikhiye zokuthola ukunemba kwemikhiqizo yepulasitiki ehlangabezana nezidingo zekhwalithi. Isikhunta esisetshenziselwa ukubumba okuqondiswa ngokunembile kufanele sihlangabezane nalolu sidingo sosayizi womkhiqizo, ukunemba kanye nokwakheka.

Kepha noma ngabe ukunemba nosayizi wesikhunta kuyafana, Usayizi wangempela wemikhiqizo yepulasitiki ebunjiwe ngeke ihambisane ngenxa yomehluko eShrikage. Ngakho-ke, kubaluleke kakhulu ukulawula ngokuphumelelayo izinga lokuncipha kwemikhiqizo yepulasitiki kubuchwepheshe bokubumba umjovo ngokunemba.

Ukuthi ukwakheka kwesikhunta kunengqondo noma cha kuzothinta ngqo izinga lokushwabana lomkhiqizo wepulasitiki. Ngoba ubukhulu bomgodi wokubumba bubalwa ngokungeza izinga lokuncipha elilinganiselwe kusayizi womkhiqizo wepulasitiki., izinga lokuncipha linconywa ngumkhiqizi wepulasitiki noma imanuwali yepulasitiki yobunjiniyela.

Ayihlobene kuphela nefomu lesango, isikhundla sesango kanye nokusabalalisa kwesikhunta, kodwa futhi ku-crystal orientation (i-anisotropy) zepulasitiki zobunjiniyela, ukuma nobukhulu bemikhiqizo yepulasitiki, ibanga lokuya esangweni kanye nendawo ehlobene.
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Izici eziyinhloko ezithinta ukuncipha kwepulasitiki ukuncipha kokushisa, ukuncipha koshintsho lwesigaba, ukuncipha kwe-orientation, Ukucindezelwa shrinkage, kanye nokubuyiselwa okuningana. Lezi zinto ezinethonya zihlobene nezimo zokubumba noma izimo zokusebenza kwemikhiqizo enobumbano yokuhlobisa.

Ngakho-ke, Ubudlelwano phakathi kwalezi zinto ezithonya kanye nemibandela yokujova kanye nezici zabo zokubukeka kufanele kubhekwe lapho kuklanywa isikhunta, njengengcindezi yomjovo kanye nengcindezi ye-cavity kanye nesivinini sokugcwalisa, Ukulimala kuncibilika izinga lokushisa nokushisa okubumba, ukwakheka kwesikhunta kanye nefomu lesango nokusatshalaliswa , Kanye nethonya lezinto ezinjengendawo yesango, Ubukhulu bodonga lomkhiqizo, Ukugcizelela okuqukethwe kweFiller ngezinto zokwakha zepulasitiki, I-Crystalloltity kanye ne-Oriental of Plastic Materials.

Ithonya lalezi zinto ezingenhla lihlukile ngenxa yezinto ezihlukile zepulasitiki, ezinye izimo zokubumba njengokushisa, ukuswakama, I-Crystallization eqhubekayo, Ukuxineka kwangaphakathi ngemuva kokubumba, kanye nezinguquko emshinini wokubumba umjovo. Ku

Ngoba inqubo yokubumba umjovo inqubo yokuguqula ipulasitiki kusuka ku-solid (powder noma pellets) uketshezi (ncibilikisa) ukuqina (umkhiqizo). Kusuka kuma-pellets ukuncibilika, bese kuthi kuncibilike kuMkhiqizo, Inkambu yokushisa, inkambu yokucindezela, inkambu yokugeleza, nensimu ye-density iphakathi.

Ngaphansi kwesenzo esihlanganisiwe salezi zinkambu, amapulasitiki ahlukene (thermosetting noma thermoplazity, ukukhala ngokucoba ngenhlaka) Noma i-non-crystalline, kuqinisiwe noma okungaqinisiwe, njll.) Iba ne-polymer ehlukile ye-morphology kanye nezakhiwo ze-rheological.
Zonke izinto ezithinta okushiwo ngenhla “idlelo” nakanjani kuzothinta izakhiwo ezingokomzimba nezemishini, ubungako, uhlobo, Ikhwalithi yokunemba nekhwalithi yemikhiqizo yepulasitiki.

Ngale ndlela, ukuxhumana kwangaphakathi phakathi inqubo yenqubo futhi Izakhiwo ze-Polymer, I-ORCRACTIC MORPHOOYS NEMIBHALO EZIZOBUCHWEPHESHI BOLOKWE NGOKUFINYELELA NGAMABHIZINISI. Ukuhlaziywa okucacile kwalokhu kuxhumana kwangaphakathi kubaluleke kakhulu ekwakheni inqubo yokuhlobisa umjovo, ukuklama ngokwesilinganiso nokukhiqiza isikhunta ngokuya ngemidwebo, futhi ngisho nokukhetha ngokuhlonza imishini yokuhlanganisa.

Ukubumba okuqondiswa ngokunembile nokubumba okujwayelekile kokujoyina nakho kuhlukile ekucindezelweni kanye nezinga lokujova. Ukubumba ukuqondiswa kokunemba kuvame ukusebenzisa umjovo wengcindezelo ephezulu noma ephezulu kakhulu yokucindezela kanye nomjovo wejubane eliphezulu ukuthola isilinganiso esincane sokubumba sokubumba.
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Kususelwa ngenxa yezizathu ezingenhla, Ngaphezu kwezinto ezijwayelekile zokuklama isikhunta, Amaphuzu alandelayo kufanele abhekwe lapho uklama Isikhunta sokuchazwa ngokunemba:
① Sebenzisa ukubekezelelana kosayizi ofanele;
②prevent Ukubumba amaphutha acwebezelayo;
Ukuguqulwa kokujova kwe-③prevent;
④Prevent demounsing deformation;
⑤ Ukunciphisa iphutha lokukhiqiza isikhunta;
⑥ Vimba amaphutha ngokunemba okubumbayo;
Qeda ukunemba kokubumba.

Uma unemibuzo ku imboni yepulasitiki,-kwethu Iqembu le-FLYSE Izokunikeza insiza engcono kakhulu!

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