Ukubumba kuyinqubo yokwenza izinhlobo ezahlukene zama-polymers (impuphu, ama-pellets, izixazululo noma ama-dispersions) abe yimikhiqizo esesimweni oyifunayo. Kubaluleke kakhulu kuyo yonke inqubo yokubumba impahla yepulasitiki futhi ukukhiqizwa kwazo zonke izinto ze-polymer noma amaphrofayili. Inqubo edingekayo.Izindlela zokubumba zepulasitiki zihlanganisa ukubunjwa kwe-extrusion, ukubunjwa komjovo, ukubunjwa kokucindezela, ukubunjwa kokudlulisa, ukubunjwa kwe-laminate, ukubunjwa kwe-blow, ukubumba kwe-calender, ukubumba i-foam, i-thermoforming nezinye izindlela eziningi, zonke ezinokuguquguquka kwazo.
I-Thermoforming kuyindlela yokukhiqiza imikhiqizo usebenzisa amashidi e-thermoplastic njengezinto zokusetshenziswa, ezingabalelwa ekubunjweni kwesibili kwamapulasitiki. Okokuqala, ishidi elisikwe ngobukhulu obuthile kanye nokuma libekwe ohlakeni lwesikhunta, futhi lishiswe esimweni esiphakeme sokunwebeka phakathi kwe-Tg-Tf, ishidi leluliwe ngenkathi lishiswa, bese ingcindezi isetshenziswa ukuze ivale. kuya esikhunjeni Indawo yokuma ifana nendawo yokuma, futhi umkhiqizo ungatholakala ngemva kokupholisa, ukubunjwa nokusikwa.Ngesikhathi se-thermoforming, ingcindezi esetshenzisiwe isekelwe ngokuyinhloko emehlukweni wengcindezi owenziwe ngokucofa kanye nokwethula umoya ocindezelwe emaceleni omabili eshidi, kodwa futhi nangomfutho wemishini kanye nomfutho we-hydraulic.
Isici se-thermoforming ukuthi ingcindezi yokwakha iphansi, futhi inqubo ye-thermoforming imi kanje:
ibhodi (ishidi) impahla → ukubopha → ukushisisa → ukucindezela → ukupholisa → ukubumba → imikhiqizo eqedwe kancane → ukupholisa → ukunquma. I-thermoforming yomkhiqizo oqediwe ihlukile kubuchwepheshe bokucubungula isikhathi esisodwa njengokubunjwa komjovo kanye ne-extrusion. Akuyona eye-resin yepulasitiki noma ama-pellets okushisa ukubumba noma ukubunjwa okuqhubekayo nge-cross-section efanayo ngokusebenzisa i-die; futhi ayisebenzisi amathuluzi omshini, amathuluzi nezinye izindlela zokucubungula imishini ukusika ingxenye yezinto zepulasitiki. Okulandelayo, ukuthola ijamo nosayizi edingekayo, kodwa ibhodi plastic (ishidi) impahla, Ukushisa, usebenzisa isikhunta, vacuum noma ingcindezi deform ibhodi (ishidi) impahla. Finyelela umumo nosayizi odingekayo, okulekelelwa yizinqubo ezisekelayo, ukuze ufeze inhloso yohlelo lokusebenza.
Ubuchwepheshe be-thermoforming buthuthukiswa ngokusekelwe endleleni yokwakha yeshidi lensimbi. Nakuba isikhathi sayo sokuthuthukiswa singeside, kodwa isivinini sokucubungula siyashesha, izinga lokuzenzekelayo liphezulu, isikhunta sishibhile futhi kulula ukusishintsha, futhi ukuguquguquka kunamandla. Ingakhiqiza imikhiqizo emikhulu njengezindiza nezingxenye zemoto, emincane njengezinkomishi zesiphuzo. Okusele kulula ukugaywa kabusha. Ingakwazi ukucubungula amashidi amancane njengo-0.10mm ubukhulu. Lawa mashidi angaba obala noma opaque, acwebezelayo noma a-amorphous. Amaphethini angaphrintwa eshidini kuqala, noma amaphethini anemibala egqamile angaphrintwa ngemuva kokubunjwa.
Eminyakeni engama-30 kuye kwengama-40 edlule, ngenxa yokwanda okuhlukahlukene kwezinto ezisetshenziswayo ze-thermoplastic sheet njengezinto zokusetshenziswa, ukuthuthukiswa okuqhubekayo kwemishini yenqubo ye-thermoforming, kanye nokusetshenziswa okubanzi kwemikhiqizo, ubuchwepheshe be-thermoforming buthuthukisiwe Ngokuthuthuka okusheshayo, ubuchwepheshe bayo. kanye nezinto zokusebenza ziya ngokuya ziba ziphelele. Uma kuqhathaniswa nokubumba komjovo, i-thermoforming inezinzuzo zokusebenza kahle kakhulu kokukhiqiza, indlela elula, ukutshalwa kwezimali okuncane kwemishini, kanye nekhono lokwenza imikhiqizo enezindawo ezinkulu. Kodwa-ke, izindleko zezinto zokusetshenziswa kwe-thermoforming ziphezulu, futhi kunezinqubo eziningi zokwenziwa ngemuva kokucubungula imikhiqizo. Ngokuthuthuka okuqhubekayo kobuchwepheshe bokukhiqiza kanye nesidingo sokwandisa izinzuzo zezomnotho, imishini ye-thermoforming kancane kancane ilahle yangaphambili njengebhodi lepulasitiki elizimele (ishidi) uhlelo lokubumba impahla, futhi seliqalile ukuhlanganisa nezinye izinto zokukhiqiza ukuhlangabezana nokwakheka. Ulayini wokukhiqiza ophelele wezidingo ezithile, ngaleyo ndlela uthuthukise ukusebenza kahle kokukhiqiza nokunciphisa izindleko zokukhiqiza umkhiqizo wokugcina.
I-Thermoforming ifaneleka ngokukhethekile ukwenziwa kwemikhiqizo enezindonga ezincane nezindawo ezinkulu. Izinhlobo zepulasitiki ezivame ukusetshenziswa zifaka i-polystyrene, i-plexiglass, i-polyvinyl chloride, i-abs, i-polyethylene, i-polypropylene, i-polyamide, i-polycarbonate ne-polyethylene terephthalate.
Isikhathi sokuthumela: Apr-20-2021