Phakathi kwezinqubo ezihlukahlukene zokubumba zokubunjwa kwepulasitiki,ukubumba umjovo iyona esetshenziswa kakhulu. Ithiyori ikhombisa ukuthi ukubumba umjovo kunezinzuzo zokusebenziseka okuqinile kwempahla, ikhono lokubumba imikhiqizo enezakhiwo eziyinkimbinkimbi ngesikhathi esisodwa, izimo zenqubo ezivuthiwe, ukunemba okuphezulu komkhiqizo, kanye nezindleko eziphansi zokusetshenziswa. Ngakho-ke, imikhiqizo ebunjiwe yomjovo ilandisa ngenani lemikhiqizo yepulasitiki ngezikhathi ezithile. Ngokukhula, izinqubo ezihlobene, izinto zokusebenza, isikhunta kanye nezindlela zokuphatha ukusetshenziswa nazo ziye zathuthukiswa ngokushesha.
I-Thermoplastics izingxenye zepulasitiki ezingabunjwa zibe yisimo esithile lapho zishiswa, futhi zinamathele kusimo esiqediwe ngemva kokupholisa. Uma kushisa futhi, kungathambisa futhi kuncibilike, futhi ingxenye yepulasitiki enomumo othile ingenziwa futhi, futhi ingamiswa ngokuphindaphindiwe, ebuyiselwa emuva.
Ngenxa yokuthi ama-thermoplastics ayizinto ezingashisiswa ngokuphindaphindiwe futhi zithambe futhi zipholile futhi ziqine, zingaqiniswa ngokuphindaphindiwe futhi zakhiwe ngokushisisa nokuncibilika, ngakho-ke imfucumfucu ye-thermoplastics ingabuye isetshenziswe futhi isetshenziswe kabusha, okubizwa ngokuthi "impahla yesibili." ”. Ukuncipha kwangemuva kwezingxenye ezibunjwe ngomjovo kusho ukuthi uma izingxenye ezibunjwe ngomjovo zibunjwa, uchungechunge lwezingcindezi lukhiqizwa ngenxa yezinguquko zazo zangaphakathi zomzimba, amakhemikhali, kanye nemishini. Ngemva kokuba izingxenye ezibunjiwe zomjovo sezibunjiwe futhi zaqina, kuba nezingcindezi ezisalayo. Ngemva kokuba izingxenye ezibunjiwe zomjovo zenziwe, ngenxa yokucindezeleka okushiyekile okuhlukahlukene, Kuzokwenza ukuthi usayizi wezingxenye ezibunjiwe zomjovo wehle futhi.
Imvamisa, ingxenye ebunjiwe yomjovo incipha kakhulu phakathi namahora ayi-10 ngemva kokudilizwa, futhi ibunjwa ngemva kwamahora angu-24, kodwa kuthatha isikhathi eside ukufinyelela umumo wokugcina. Ngokuvamile, i-post-shrinkage ye-thermoplastics inkulu kunaleyo yepulasitiki ye-thermoset, futhi ukushwabana kwangemuva komjovo okubunjiwe kanye nezingxenye ezibunjwe ngomjovo kukhulu kunezingxenye ezibunjwe ngomjovo onciphayo.
Isikhathi sokuthumela: Aug-17-2021