Labaran Kamfani

A lokacin samarwa, lokacin da aka yi allurar narkewar filastik a cikin ramin mold a ƙarƙashin zafi mai yawa da matsin lamba mai yawa kuma aka ƙera shi a ƙarƙashin matsin lamba, lokacin da zafin ya faɗi, narkewar ta yi sanyi ta kuma tauri ta zama ɓangaren filastik. Girman ɓangaren filastik ya fi na ramin mold ƙanƙanta, wanda ake kira shorten. Manyan dalilan ragewa sune kamar haka. Lokacin yin robobi, girman giciye na ƙofofin mold daban-daban sun bambanta. Babban ƙofar yana taimakawa wajen ƙara matsin lamba na rami, tsawaita lokacin rufe ƙofar, da kuma sauƙaƙe kwararar narkewa cikin rami, don haka yawan ɓangaren filastik shima ya fi girma, ta haka yana rage saurin ragewa, in ba haka ba zai ƙara saurin ragewa.

Canje-canje a cikin tsarin sinadarai na mold ɗin filastik yayin aikin ƙera shi. Wasu robobi suna canza tsarin sinadarai yayin aikin ƙera shi. Misali, a cikin robobi masu daidaita yanayin zafi, molecule na resin yana canzawa daga tsarin layi zuwa tsarin kamar jiki. Girman girma na tsarin kamar jiki ya fi na tsarin layi girma, don haka jimlar girmansa yana raguwa, wanda ke haifar da raguwa. Sassan filastik masu sirara tare da kauri bango iri ɗaya ana sanyaya su da sauri a cikin ramin mold, kuma saurin ragewa yakan zama mafi ƙanƙanta bayan rushewa. Tsawon lokacin da aka yi amfani da ɓangaren filastik mai kauri tare da kauri bango iri ɗaya don sanyaya a cikin rami, mafi girman raguwar bayan rushewa. Idan kauri na ɓangaren filastik ya bambanta, za a sami wani matakin raguwa bayan rushewa. A cikin yanayin irin wannan canji kwatsam a cikin kauri bango, ƙimar ragewa zai kuma canza ba zato ba tsammani, wanda ke haifar da ƙarin damuwa na ciki.

Sauyawar damuwa. Lokacin da aka ƙera sassan filastik, saboda tasirin matsin lamba na ƙira da ƙarfin yankewa, anisotropy, haɗa ƙarin abubuwa marasa daidaituwa da zafin mold, akwai damuwa a cikin sassan filastik da aka ƙera, kuma damuwar da ta rage za ta ragu a hankali ta sake yaduwa, wanda ke haifar da sassan filastik. Rage raguwar kuma galibi ana kiranta bayan ragewa.