SANAA
UREMBO NA USTAWI
UJANJA
UTAMADUNI NA HISTORIA
BURUDANI
MAZINGIRA
CHAKULA NA VINYWAJI
UHANDISI WA KINYUME
SAYANSI
MICHEZO
TEKNOLOJIA
VAZI
Tinplate and Galvanized Steel Sheet from Coil
Thin steel rusts, so most sheet is coated in continuous lines that run a coil through at speed. Tinplate, the material of food cans, is cold-reduced steel strip about 0.15–0.55 mm thick electroplated with a thin layer of tin, around 1–11 g per square metre; the strip is then heated just past tin's melting point so the coating flows bright, and passivated and oiled. Galvanized sheet is strip run through a bath of molten zinc, the same coating as batch galvanizing done continuously; excess zinc is wiped off as the strip rises, setting the coating thickness.
Juu
Continuous (industrial)
Maagizo
1
1
Clean the strip
Clean the strip
The cold-rolled coil is uncoiled into a moving strip and cleaned so the coating will bond.
Vifaa kwa hatua hii:
Koili ya feleji1000 kgZana zinazohitajika:
Mstari wa upakaji endelevu2
2
Tinplate: electroplate
Tinplate: electroplate
The strip runs through plating cells that deposit a thin, controlled weight of tin on both sides: 1.1–11.2 g per square metre. Here 2.8 g a side on 0.2 mm strip, about 3.6 kg of tin per tonne.
Vifaa kwa hatua hii:
Kipande cha bati (tin)3.6 kgZana zinazohitajika:
Mstari wa upakaji endelevu3
3
Tinplate: reflow
Tinplate: reflow
The strip is heated just past tin's melting point so the matt coating flows bright, then quenched.
Zana zinazohitajika:
Mstari wa upakaji endelevu4
4
Galvanized: zinc bath
Galvanized: zinc bath
The strip dips through molten zinc and rises out; excess zinc is wiped off to set the coating. Here Z275, 275 g per square metre counting both sides, on 1 mm strip: about 35 kg of zinc per tonne.
Vifaa kwa hatua hii:
Mche wa Zinki35 kgZana zinazohitajika:
Mstari wa upakaji endelevu5
5
Finish and recoil
Finish and recoil
Tinplate is passivated and lightly oiled; the coated strip is recoiled or cut into sheets.
Zana zinazohitajika:
Mstari wa upakaji endelevuVifaa
3- 1000 kgKishikilia Nafasi
- 3.6 kgKishikilia Nafasi
- 35 kgKishikilia Nafasi
Mchoro huu unatengeneza
Blueprint zinazohusiana
Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni
CC0 Umma Wote
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Saidia Mtengenezaji kwa kununua bidhaa kupitia Mchoro wao ambapo wanapata Kamisheni ya Mtengenezaji iliyowekwa na Wachuuzi, au unda marudio mapya ya Mchoro huu na uiunganishe kama kiungo katika Mchoro wako kuchangia mapato.