1
the generalid process for gravity sand casting
input
output
process
green kingdesign "method"
cast metal
accept/reject casting
component geometry
good casting
inspect for defects
make pattern in wood,
成员英语
metal or plastic
make mould in sand bonded with resin or clay (greensand)
2
gravity sand casting
•covers a range of process
–resin bonded sand (picture)
•polymer binder to glue sand grains together
–"green" sand (picture)
•unfired (green) natural clay (bentonite) bond to stick sand grains together
Gravity sand casting greensand mould
3
gravity sand casting
•ud for
–iron
•up to 250 tonnes (big casting picture)
–steel
•up to 250 tonnes (big casting picture) (small casting picture)–aluminium
•up to 5 tonnes
–magnesium
•up to 2 tonnes
覆灭的意思–copper
•up to 100 tonnes (Picture from Westley)
4
casting example
iron
5 casting
example
steel
6
7
casting example
copper
8
高考政治答题技巧gravity sand casting
step1
•mould and cores made in sand (picture)
•horizontal or vertical split horizontal may be many split lines (picture)
•resin or clay ud to bond sand grains
•metal or graphite chills ud to promote
日语人工翻译lective higher cooling •facing sands or尖酸刻薄的人
chromite or zirconia ud to promote some chilling
gravity sand casting
•manufacture
•automated
–up to 400 moulds/hour
•by hand
–weeks to make
9
gravity sand casting
•consumables added to mould学英语网>曹其军
•insulation (alumino-silcate bad) for slower cooling •exothermic powders and proprietary products for even slower cooling
10
gravity sand casting
•pouring
•by hand
•mi-automated
•automated
urgent怎么读11
gravity sand casting
•in-mould metal treatments
•filters
12
