Tarihin gwangwani na aluminum
Giya na ƙarfe da gwangwani na abin sha suna da tarihin fiye da shekaru 70. A farkon shekarun 1930, Amurka ta fara samar da gwangwani na giya. Wannan gwangwani guda uku an yi shi da tinplate. Na sama na jikin tanki mai siffar mazugi ne, kuma na sama yana da murfi mai siffar rawani. Siffar ta gaba ɗaya ba ta bambanta da na kwalabe ba, don haka an yi amfani da layin cika kwalban don cikawa a farkon. Sai a shekarun 1950s aka sami keɓaɓɓen layin cikawa. Murfin gwangwani ya samo asali zuwa siffa mai laushi a tsakiyar shekarun 1950 kuma an inganta shi zuwa murfin zoben aluminum a cikin 1960s.
gwangwani na abin sha na aluminum sun bayyana a baya a ƙarshen 1950s, kuma gwangwani na DWI guda biyu sun fito bisa hukuma a farkon shekarun 1960. Ci gaban gwangwani na aluminum yana da sauri sosai. A karshen wannan karnin, abin da ake amfani da shi a shekara ya kai fiye da biliyan 180, wanda shi ne kashi mafi girma a cikin jimillar gwangwani na karfe a duniya (kimanin biliyan 400). Amfanin aluminium da ake amfani da shi don kera gwangwani na aluminum shima yana girma cikin sauri. A 1963, ya kusan kusan sifili. A cikin 1997, ya kai tan miliyan 3.6, wanda yayi daidai da 15% na yawan amfani da kayan aluminium daban-daban a duniya.
An ci gaba da inganta fasahar masana'anta na gwangwani na aluminum.
Shekaru da yawa, fasahar masana'anta na gwangwani aluminum an ci gaba da inganta. An rage nauyin gwangwani na aluminum sosai. A farkon shekarun 1960, nauyin kowane gwangwani na aluminum dubu (ciki har da jikin gwangwani da murfin) ya kai kilo 55 (kimanin kilo 25), kuma a tsakiyar shekarun 1970 ya fadi zuwa 44.8 fam (25 kg). Kilograms), an rage shi zuwa kilogiram 33 (kilogram 15) a karshen shekarun 1990, kuma yanzu an rage shi zuwa kasa da fam 30, wanda kusan rabin wancan shekaru 40 da suka gabata. A cikin shekaru 20 daga 1975 zuwa 1995, adadin gwangwani na aluminium (oz 12 a iya aiki) da aka yi da fam 1 na aluminum ya karu da kashi 35%. Bugu da kari, bisa ga kididdigar da American ALCOA kamfanin, da aluminum abu da ake bukata ga kowane dubu aluminum gwangwani da aka rage daga 25.8 fam a 1988 zuwa 22.5 fam a 1998, sa'an nan kuma rage zuwa 22.3 fam a 2000. American iya-yin kamfanoni sun ci gaba da yin nasara a cikin sealing inji, da kuma sauran fasahar iya ci gaba da yin nasara a cikin sealing inji, da kuma sauran fasahohin na iya rage kauri daga Amurka. 0.343 mm a 1984 zuwa 0.285 mm a 1992 da 0.259 mm a 1998.
Ci gaba mai nauyi a cikin murfi na aluminum shima a bayyane yake. Kauri na aluminum na iya faduwa daga 039 mm a farkon shekarun 1960 zuwa 0.36 mm a cikin 1970s, daga 0.28 mm zuwa 0.30 mm a 1980, zuwa 0.24 mm a tsakiyar 1980s. Hakanan an rage diamita na murfin gwangwani. Nauyin murfin gwangwani ya ci gaba da raguwa. A cikin 1974, nauyin gwangwani na aluminum dubu ya kai fam 13, a 1980 an rage shi zuwa fam 12, a 1984 an rage shi zuwa fam 11, a 1986 an rage shi zuwa fam 10, kuma a 1990 da 1992 an rage shi zuwa fam 9 da 9. 8 fam, an rage zuwa 6.6 fam a 2002. An inganta saurin yin iyawa sosai, daga 650-1000cpm (kawai a cikin minti daya) a cikin 1970s zuwa 1000-1750cpm a cikin 1980s kuma fiye da 2000cpm yanzu.
Lokacin aikawa: Dec-28-2021