A lokacin samarwa, lokacin da aka yi allurar narke filastik a cikin rami mai ƙarfi a ƙarƙashin matsanancin zafin jiki da matsa lamba kuma an ƙera shi a ƙarƙashin matsin lamba, lokacin da zafin jiki ya faɗi, narke yana yin sanyi kuma yana ƙarfafawa zuwa ɓangaren filastik.Girman ɓangaren filastik ya fi ƙanƙanta fiye da na ƙura, wanda ake kira gajere.Babban dalilan ragewa sune kamar haka.Lokacin yin filastik, ma'aunin giciye na ƙofofin ƙira daban-daban sun bambanta.Babban kofa yana taimakawa wajen ƙara matsa lamba, tsawaita lokacin rufe ƙofar, da sauƙaƙe ƙarin narkewa a cikin rami, don haka yawancin ɓangaren filastik ma ya fi girma, ta haka ne rage raguwa, in ba haka ba zai ƙara raguwa. ƙimar.
Canje-canje a cikin tsarin sinadarai na ƙirar filastik yayin aikin masana'anta.Wasu robobi suna canza tsarin sinadarai yayin aikin gyare-gyare.Misali, a cikin robobi na thermosetting, resin molecule yana canzawa daga tsarin layi zuwa tsari mai kama da jiki.Matsakaicin girma na tsarin mai kama da jiki ya fi na tsarin layin layi girma, don haka an rage yawan ƙararsa, yana haifar da raguwa.Sassan filastik masu siraɗin bango tare da kaurin bango iri ɗaya suna yin sanyi da sauri a cikin kogon ƙura, kuma raguwar adadin yakan zama mafi ƙanƙanta bayan rushewa.Tsawon lokacin ɓangaren filastik mai kauri mai kauri iri ɗaya don yin sanyi a cikin rami, mafi girma ga raguwa bayan rushewa.Idan kauri na ɓangaren filastik ya bambanta, za a sami wani matakin raguwa bayan rushewa.A cikin yanayin irin wannan canjin kwatsam na kauri na bango, raguwar raguwa kuma zai canza ba zato ba tsammani, yana haifar da damuwa na ciki.
Saura danniya canje-canje.Lokacin da aka ƙera sassan filastik, saboda tasirin gyare-gyaren gyare-gyare da ƙarfin ƙarfi, anisotropy, haɗuwa da ƙari na ƙari da zafin jiki, akwai sauran damuwa a cikin sassan filastik da aka ƙera, kuma ragowar damuwa za su zama ƙarami kuma a sake yadawa. sakamakon sassa na filastik Ana kiran gajarta gabaɗaya bayan gajarta.
Lokacin aikawa: Yuli-05-2021