Nhoroondo yemagaba ealuminium
Metal doro nemagaba ekurongedza zvinwiwa zvine nhoroondo yemakore anopfuura makumi manomwe. Mukutanga kwema1930, United States yakatanga kugadzira doro resimbi. Ichi chigaba chetatu chakagadzirwa netinplate. Chikamu chepamusoro chemuviri wetangi chine-cone-shaped, uye chikamu chepamusoro chine korona-chivharo chivharo. Chitarisiko chayo chakajairika hachina kunyanya kusiyana neiyo yemabhodhoro egirazi, saka girazi rekuzadza bhodhoro raishandiswa pakuzadza pakutanga. Yakanga isiri kusvika kuma1950 apo mutsara wakatsaurirwa wekuzadza waivepo. Chivharo chegaba chakashanduka kuita chimiro chakati sandara pakati pemakore ekuma1950 uye chakavandudzwa kuita chivharo chemhete yealuminium muma1960.
Aluminium zvinwiwa magaba akaonekwa kare mukupera kwema1950, uye maviri-zvidimbu DWI magaba akabuda zviri pamutemo mukutanga kwema1960. Kugadzirwa kwealuminium cans kunokurumidza zvikuru. Pakupera kwezana rino remakore, kushandiswa kwegore negore kwasvika kudarika mabhiriyoni 180, inova chikamu chikuru munyika yose yemagaba esimbi (anenge mabhiriyoni 400). Kushandiswa kwealuminium inoshandiswa kugadzira magaba ealuminium kuri kukurawo nekukurumidza. Muna 1963, yakanga yava pedyo ne zero. Muna 1997, yakasvika mamiriyoni 3.6 ematani, iyo yakaenzana ne15% yehuwandu hwekushandiswa kwezvinhu zvakasiyana-siyana zvealuminium munyika.
Iyo tekinoroji yekugadzira yemagaba ealuminium yave ichiramba ichivandudzwa.
Kwemakumi emakore, tekinoroji yekugadzira emagaba ealuminium yakaramba ichivandudzwa. Huremu hwemagaba ealuminium hwakaderedzwa zvakanyanya. Mukutanga kwema1960, huremu hwechiuru chimwe nechimwe chearuminiyamu magaba (kusanganisira chigaba chegaba nechivharo) chakasvika makirogiramu makumi mashanu neshanu (anenge makirogiramu makumi maviri neshanu), uye pakati pemakore ekuma1970 yakawira ku44.8 mapaundi (25 kg). Makirogiramu), yakaderedzwa kusvika pamapaunzi makumi matatu nematatu (makirogiramu gumi nemashanu) mukupera kwema1990, uye iko zvino yakaderedzwa kusvika isingasviki makirogiramu makumi matatu, inova inenge hafu yemakore makumi mana apfuura. Mumakore makumi maviri kubva muna 1975 kusvika muna 1995, nhamba yemagaba ealuminium (12 ounces in capacity) yakagadzirwa ne1 pound yealuminium yakawedzera ne35%. Pamusoro pezvo, maererano nenhamba dzekambani yeAmerican ALCOA, zvinhu zvealuminium zvaidiwa pazviuru zvega zvega zvealuminium zvakaderedzwa kubva pa25.8 pounds muna 1988 kusvika pa22.5 pounds muna 1998 ndokuzodzikiswa kusvika pa22.3 pounds muna 2000. Makambani ekuAmerica anogadzira makona akaenderera mberi nekuita mamwe mabhindauko ehunyanzvi hwekugadzira michina uye mamwe mabhindauko ekugadzira michina. Aluminium cans muUnited States yakaderera zvakanyanya, kubva pa 0.343 mm muna 1984 kusvika 0.285 mm muna 1992 uye 0.259 mm muna 1998.
Huremu kufambira mberi mualuminium can lids zvakare pachena. Ukobvu hwealuminium hunogona kudonha kubva pa039 mm mukutanga kwema1960 kusvika pa0.36 mm muma1970, kubva pa0.28 mm kusvika 0.30 mm muna 1980, uye kusvika 0.24 mm pakati pemakore ekuma1980. Iyo dhayamita yevhavha yegaba yakaderedzwawo. Huremu hwemagaba mavharo hwakaramba huchidzikira. Muna 1974, huremu hwemagaba ealuminium ane chiuru hwakanga huri 13 pounds, muna 1980 hwakaderedzwa kusvika 12 pounds, muna 1984 hwakaderedzwa kusvika 11 pounds, muna 1986 hwakaderedzwa kusvika 10 pounds, uye muna 1990 uye 1992 yakaderedzwa kusvika pa9 pounds. 8 pounds, yakaderedzwa kusvika 6.6 pounds muna 2002. Kukurumidza-kuita-kukwanisa kwakagadziridzwa zvikuru, kubva pa650-1000cpm (chete paminiti) muma1970 kusvika ku1000-1750cpm muma1980 uye kupfuura 2000cpm ikozvino.
Nguva yekutumira: Zvita-28-2021