Umkhiqizi ochwepheshe wemishini yokushisa ukushisa.
Ulimi
Umkhiqizi ochwepheshe wemishini yokushisa ukushisa.
Ukusebenza kokwakhiwa kwezindlela ezihlukahlukene zokwakha ngokuyinhloko ukugoba nokwelula ishidi elishisiwe ngokwezidingo ezinqunywe kusengaphambili ngokusebenzisa amandla. Imfuneko eyisisekelo kakhulu yokubumba ukwenza ukushuba kodonga lomkhiqizo kufane ngangokunokwenzeka. Izizathu eziyinhloko zobukhulu obungalingani bodonga lwemikhiqizo yilezi: okokuqala, izinga lokwelula ingxenye ngayinye yeshidi elibunjiwe lihlukile; okwesibili, ubukhulu bejubane elinwebekayo, okungukuthi, izinga lokugeleza kwegesi lokukhishwa komoya kanye nokwehla kwamandla emali noma ijubane elinyakazayo lesikhunta, ifreyimu yokubopha kanye ne-pre stretching plunger. Ukwakhiwa kungenye inqubo ebalulekile ngemva kokushisa kwepuleti (ishidi), okuhlanganisa nokulawulwa kwemingcele ebalulekile yezobuchwepheshe njengokwenza izinga lokushisa, ukwakha ingcindezi kanye nesivinini sokwenza.
①Imishini Yepulasitiki Ye-Thermoforming Ukwakha Izinga lokushisa
Ngemuva kokunqunywa kwezinto, uhlobo lwenqubo kanye nemishini, izinga lokushisa lokubumba liyisici esiyinhloko esithinta ikhwalithi yomkhiqizo, esithinta ngokuqondile ubukhulu obuncane, ukusatshalaliswa kogqinsi kanye nephutha le-dimensional lomkhiqizo, futhi kuthinta ukuphakama namandla okuqina komkhiqizo. , futhi ithinta ngisho nesivinini sokwakheka. Ngakho-ke, kufanele kuthathwe ngokungathi sína. Uma ishidi le-thermoforming lishisiswa, qiniseka ukuthi yonke indawo eyakhayo ifudumala ngokulinganayo futhi ukusetha izinga lokushisa kuyafaneleka.
Ngokusho komkhuba, izinga lokushisa elihle kakhulu lokubumba izinga lokushisa lapho ukuphakama kwepulasitiki kuphezulu kakhulu. Uma ukucindezeleka okubangelwa ukucindezela kokubumba kukhulu kunamandla okuqina epulasitiki kulokhu kushisa, ishidi lizokhubazeka kakhulu futhi lonakaliswe. Ngalesi sikhathi, izinga lokushisa lokubumba noma ingcindezi yokubumba kufanele yehliswe. Izinga lokushisa eliphansi lokubumba linganciphisa isikhathi sokupholisa futhi longe amandla, kodwa ukwakheka nokuzinza kwe-dimensional komkhiqizo kuzoba kubi, futhi incazelo yohlaka izoba yimbi. Emazingeni okushisa aphezulu okubumba, ukuguqulwa komkhiqizo kuba kuncane, futhi umumo nosayizi uzinzile. Kodwa-ke, izinga lokushisa eliphezulu kakhulu lizodala ukuwohloka kwenhlaka kanye nokuguquka kombala. Enqubweni yokukhiqiza ye-thermoforming yangempela, kunesikhathi esithile phakathi kokushisisa nokwakheka kweshidi, futhi okunye ukushisa kuzolahleka, ikakhulukazi ishidi elincanyana elinamandla okushisa athile. Izinga lokushisa langempela lokushisisa leshidi liphezulu uma kuqhathaniswa, futhi izinga lokushisa elilungile langempela lokwakheka ngokuvamile linqunywa ngokuhlolwa nokukhiqiza.
Isivinini esinwebekayo sihlobene eduze nezinga lokushisa lapho kwakhiwa ishidi. Uma izinga lokushisa liphansi futhi umthamo wokuguqulwa kweshidi ulincane, ishidi kufanele lelulwe kancane. Uma kwamukelwa isivinini esikhulu sokwelula, izinga lokushisa ngesikhathi sokwelula kufanele lenyuke. Njengoba ishidi lisakhipha ukushisa futhi liphole ngesikhathi libunjwa, isivinini esinwebekayo seshidi elincanyana ngokuvamile siphakeme kuneshidi eliwugqinsi.
②Imishini Yepulasitiki Ye-Thermoforming Ukwakha Ingcindezi
Umphumela wokucindezela wenza ishidi liguge, kodwa impahla inamandla okumelana nokuguquka, futhi i-elastic modulus yayo iyancipha ngokunyuka kwezinga lokushisa. Emazingeni okushisa okubumba, kuphela lapho ukucindezeleka okubangelwa ukucindezelwa kwezinto kukhulu kune-modulus enwebekayo yempahla kulokhu kushisa kungakhubazeka. Uma ingcindezi esetshenziswa ekushiseni okuthile ayanele ukukhiqiza ukwelulwa okwanele kwezinto, ukubunjwa kungenziwa ngokushelelayo kuphela ngokwandisa ingcindezi yokubumba noma ukwandisa izinga lokushisa lokubumba. Ngenxa yokuthi i-elastic modulus yezinto ezihlukahlukene ihlukile futhi inokuncika okuhlukile ekushiseni, ingcindezi yokubumba iyahlukahluka ngohlobo lwe-polymer (kuhlanganise nesisindo samangqamuzana ahlobene), ukushuba kweshidi kanye nezinga lokushisa lokubumba. Ngokuvamile, amapulasitiki ane-high molecular chain rigidity, isisindo samangqamuzana aphezulu kanye namaqembu e-polar adinga ukucindezela okuphezulu kokubumba.
Ngaphezu kwethonya lokushisa lokubumba, izinga lokushisa lesikhunta kanye nomphumela wokudweba, ukunemba komkhiqizo ophelile wezingxenye ze-thermoformed ikakhulukazi kuncike ekucindezelweni okusebenzayo okubumba phakathi kwezingxenye ze-thermoformed kanye nesikhunta.
Ingcindezi yokubumba evamile yokubumba (isikhunta sesilisa): 0.2-0.3mpa yezingxenye ezibunjiwe zendawo enkulu; Izingxenye ezincane kufika ku-0.7MPa. Ukubumba i-vacuum, ingcindezi yokubumba iphansi futhi incike kakhulu ekucindezelweni komkhathi. Ekuphakameni okungu-0, lapho kusetshenziswa iphampu ye-vacuum yekhwalithi ephezulu, ingcindezi yokubumba ingafinyelela cishe ku-1 MPa.
Njengoba ingcindezi ekhiqizwe i-vacuum ilingana nomehluko wengcindezi phakathi kwengcindezi yasemkhathini ohlangothini olulodwa lwempahla yokubumba kanye ne-vacuum ekhiqizwa ngakolunye uhlangothi, ingcindezi yokubumba incike ekucindezelweni komoya kanye nezinga lokuvala. Ngakho-ke, ngisho noma kusetshenziswa iphampu ye-vacuum engcono kakhulu, ingcindezi yokubumba izoqhubeka yehla ngokunyuka kokuphakama.
③Imishini Yepulasitiki Ye-Thermoforming Ukwakha Isivinini
Izizathu eziyinhloko zobukhulu obungalingani bodonga lwemikhiqizo yilezi: okokuqala, izinga lokwelula ingxenye ngayinye yeshidi elibunjiwe lihlukile; okwesibili, ubukhulu bejubane elinwebekayo, okungukuthi, izinga lokugeleza kwegesi lokukhishwa komoya kanye nokwehla kwamandla emali noma ijubane elinyakazayo lesikhunta, ifreyimu yokubopha kanye ne-pre stretching plunger. Ijubane lokwakha libhekisela ejubaneni lokudweba lepuleti (ishidi). Ukwandisa isivinini sokwenza kunganciphisa umjikelezo wokwakha futhi kunenzuzo ekwenzeni ngcono ukukhiqiza. Kodwa-ke, isivinini sokwenza ngokweqile sizothinta ikhwalithi yomkhiqizo. Ngokuvamile, isivinini sokudweba esiphezulu sinenzuzo ekuzakheleni nasekunciphiseni isikhathi somjikelezo, kodwa ukudweba okusheshayo kuvame ukudala ukushuba kodonga lwezingxenye ze-concave kanye ne-convex zomkhiqizo zibe mncane kakhulu ngenxa yokugeleza okwanele; Kodwa-ke, uma ukwelula kuhamba kancane, umthamo wokuguqulwa weshidi uzokwehla ngenxa yokupholisa ngokweqile, futhi umkhiqizo uzoqhekeka.
Isenzo sesikhunta siqhutshwa umfutho we-hydraulic, umfutho womoya noma i-motor. Ngesikhathi sokwakhiwa okushisayo, ipuleti lepulasitiki (ishidi) lizonwetshwa futhi likhubazekile ngaphansi kwengcindezi noma i-plunger. Ijubane elinwebekayo lezinto ezibonakalayo lihlukile ngesivinini sokwenza. Isivinini sokusebenza sesikhunta singalawulwa ngamazinga, futhi imodi yokusheshisa kuqala futhi kancane kamuva ikhethwa ngokujwayelekile. Isivinini sesenzo sesikhunta kufanele sihambisane nesivinini sokwelula kwangaphambili. Uma isenzo sihamba kancane, izinga lokushisa lepuleti lizokwehla, elingenakukwazi ukubunjwa, futhi uma isenzo sishesha kakhulu, ipuleti ingase idabuke. Ngeshidi elinobukhulu obuthile, izinga lokushisa lokushisa lizokwenyuswa ngokufanele futhi isivinini sokwenza ngokushesha sizokwamukelwa.
Umkhiqizi ochwepheshe wemishini yokushisa ukushisa.
