Amaphuzu ayisithupha abalulekile wokubumba komjovo we-pp

Amaphuzu ayisithupha ayinhloko we-pp injection molding.Ukucubungula kwezinto zokusetshenziswa kwepulasitiki ikakhulukazi ukuncibilika, ukugeleza, uhlobo, bese upholisa ube umkhiqizo oqediwe. Kuyinqubo yokufudumeza bese uyapholisa. Kubuye kube yinqubo lapho ipulasitiki ishintsha kusuka kuma-pellets kuya emimoyeni ehlukene. Okulandelayo kuzochaza ukucutshungulwa ngokwemibono yezigaba ezahlukahlukene. Inqubo.

1. Iyancibilika

I-heater ikuvumela ukuthi ulungise izinhlayiya zempahla eluhlaza ukuncibilika kancane kancane ku-fluid flow, okuyinto ngokuyinhloko efanelekile ukulungiswa kwezinga lokushisa kwezinto ezihlukahlukene zokusetshenziswa. Ukwandisa izinga lokushisa kuzovame ukusheshisa ukugeleza kwezinto ezingavuthiwe, okungakhuphula ukusebenza kahle kodwa kungase kungaqinisekisi isivuno. Kufanele kube Ibhalansi efanele.

Ngaphezu kwalokho, umphumela omuhle kanye nezici zokuqhekeka okuphezulu okushisayo kwe-PP ukuthi kungcono ukwenza izinto zokusetshenziswa zigeleze ngokushelela ekufeni ngesikhathi sokukhiqiza ukugwema ukugcwaliswa okwanele noma ukubuyela emuva.. Ukubuyela emuva kusho ukuthi ukugeleza kwezinto zokusetshenziswa kuyashesha kunezinga lokuphumayo. Ukwenyuka kokusebenza kahle kokugeleza okumaphakathi kulingana nokukhuphuka kwe-MFR, okungenye yezindlela ezikhona zokucubungula, kodwa futhi kubangela ukusatshalaliswa kwe-MFR okungavamile, okungase kuholele ekwenyukeni kokungazinzi, okungase kwenyuse izinga lokukhubazeka.

Noma kunjalo, i PP umkhiqizo akuwona umkhiqizo onokunemba okuphezulu kobukhulu ngenxa yohlelo lokusebenza, ngakho umthelela awumkhulu.

2. Kulufa

Iningi le Ukucubungula kwe-PP iqhutshwa isikulufu ukushayela uketshezi, ngakho umklamo wesikulufa unethonya elikhulu. Ubukhulu bobubanzi buthinta okukhiphayo, futhi isilinganiso sokucindezela sithinta inani lokucindezela kanye nokuphumayo kanye nomphumela womkhiqizo oqediwe. Lokhu kuhlanganisa nezinhlobonhlobo zezinto. (Ama-masterbatches ombala, izithasiselo kanye modifiers) ukuxuba umphumela.

Ukugeleza kwezinto zokusetshenziswa ikakhulukazi kuncike ku-heater, kodwa ukushisa okushayisanayo kwezinto zokusetshenziswa kuzophinde kukhiqize ukushisa okungqubuzanayo ukuze kusheshiswe uketshezi, ngakho-ke isilinganiso sokucindezela isikulufa sincane futhi ukugeleza kuncane, futhi isivinini sokuzungeza kufanele sinyuswe. Ukushisa okungqubuzanayo kuzoba ngaphezulu kwalokho kwesikulufu esinesilinganiso esikhulu sokucindezela.

Ngakho-ke, ngokuvamile kuthiwa akukho master in plastic processing, futhi umuntu oqonda ngokucophelela ukusebenza komshini yinkosi. Ukushisa kwezinto zokusetshenziswa akuyona nje i-heater, kodwa futhi ukushisa okungqubuzanayo nesikhathi sokuhlala.

Ngakho lokhu kuyinkinga engokoqobo, kanye nolwazi lusiza ukuxazulula izinkinga zokukhiqiza nokusebenza kahle. Uma isikulufu sidinga ukuba nomphumela omuhle kakhulu wokuhlanganisa, ngesinye isikhathi izikulufu ezihlukene ezinezigaba ezimbili noma izikulufu ze-twin-shaft ziyaklanywa futhi izinhlobo ezihlukene zezikulufu zihlukaniswa zibe izigaba ukuze kuzuzwe imiphumela ehlukahlukene yokuxuba..

3. Isikhunta noma fa ikhanda

Ukubunjwa kabusha kwepulasitiki kuncike kusikhunta noma ekhanda lokufa. Umkhiqizo owenziwe ngomjovo unezinhlangothi ezintathu, futhi isikhunta siyinkimbinkimbi kakhulu, nokuncipha kufanele kucatshangelwe. Ezinye ziyisicaba, hlubula, kanye namakhanda okufa amise njengenaliti yomkhiqizo. Uma kuyisimo esikhethekile, Ihlukaniswa njengomumo okhethekile, futhi udinga ukunaka inkinga yokupholisa nokubumba ngokushesha.

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Iningi lemishini yepulasitiki iklanywe njengezinja zomjovo, futhi amandla e-extrusion aqhutshwa isikulufu azodala ingcindezi enkulu ezindaweni ezincane futhi athuthukise ukusebenza kahle kokukhiqiza. Lapho ikhanda lokufa lenziwe njengendawo eyisicaba, indlela yokwenza izinto zokusetshenziswa zisakazwe ngokulinganayo endaweni yonke kubaluleke kakhulu.

4.Ukupholisa

Ngaphezu kwesango le-sprue lithela impahla eluhlaza, i umjovo isikhunta futhi inomzila wamanzi okupholisa ukupholisa umklamo wempahla eluhlaza. Ukubunjwa kwe-Extrusion ithembele kumzila wamanzi okupholisa ku-roller ukufeza umphumela wokupholisa, ngaphandle kombese womoya, amanzi okupholisa athelelwa ngqo esikhwameni esiphephethayo, kanye nendlela yokupholisa njengokuvuthela okungenalutho.

5.Isandiso

Ukucutshungulwa kabusha kanye isandiso womkhiqizo oqediwe uzothuthukisa umphumela. Ngokwesibonelo, ibhande lokubopha lishayelwa amarola angaphambili nangemuva ngesivinini esihlukene ukuze kubangele umphumela wokunwetshwa. Amandla aqinile wengxenye enwetshiwe eqondiwe yomkhiqizo oqediwe ayaqiniswa futhi akulula ukudabula, kodwa kulula kakhulu ukuklebhula ohlangothini oluvundlile. Ukusatshalaliswa kwesisindo samangqamuzana nakho kuthinta umphumela wokunweba phakathi nokukhiqizwa kwesivinini esikhulu. Yonke imikhiqizo ekhishwe okuhlanganisa imicu inezandiso ezihlukene. Ukwakhiwa kwe-vacuum nokucindezela kungase kubhekwe njengolunye uhlobo lwesandiso.

6, shwabana

Noma iyiphi impahla eluhlaza inenkinga yokuncipha. I-shrinkage ibangelwa ukwanda okushisayo kanye nokuncipha okubandayo nokucindezeleka kwangaphakathi okukhiqizwa ngesikhathi sokwakheka kwekristalu..

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Sengisho nje, ukunwebeka okushisayo nokufinyela kulula ukukunqoba, futhi isikhathi sokupholisa singanwetshwa ekucutshungulweni, futhi ingcindezi ingagcinwa ngokuqhubekayo. Izinto zokusetshenziswa zecrystalline zivame ukuba nomehluko omkhulu wokushwabana kunezinto ezingezona ikristalu, okungaba yinkulungwane ye-PP. Ishumi nesithupha, kodwa i-ABS cishe izinkulungwane ezine kuphela. Le ngxenye yomehluko inkulu kakhulu. Le ngxenye kufanele inqotshwe phezu kwesikhunta, noma izithasiselo zokunciphisa ukuncipha kuvame ukungezwa ukuze kunqobe ipuleti le-extrusion. I-LDPE ivame ukungezwa ukuthuthukisa inkinga yentamo.