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Страница 216
The patterns are mounted on two plates , one for cope and one for drag , so laid
out from the flask pins that the cope and drag ... One type operates by lowering
the mold away from the pattern while another lifts the pattern away from the mold
.
The patterns are mounted on two plates , one for cope and one for drag , so laid
out from the flask pins that the cope and drag ... One type operates by lowering
the mold away from the pattern while another lifts the pattern away from the mold
.
Страница 217
The sand is jarred by means of a foot lever and the boards are then squeezed
into place , the mold rolled over and the pattern drawn away from the mold . For
use in steel foundries on small work this type of machine is one of the best .
The sand is jarred by means of a foot lever and the boards are then squeezed
into place , the mold rolled over and the pattern drawn away from the mold . For
use in steel foundries on small work this type of machine is one of the best .
Страница 218
Do not expect any old flask or pattern arrangement to be good enough . It is quite
possible to produce one or two molds with any sort of flask and pattern , provided
time enough be given , but if you want production in quantities and the casting ...
Do not expect any old flask or pattern arrangement to be good enough . It is quite
possible to produce one or two molds with any sort of flask and pattern , provided
time enough be given , but if you want production in quantities and the casting ...
Страница 219
Vibrator Frame By attaching the patterns to a vibrator frame and having a good
hard - sand match ( Fig . 6 ) , you save the time used in rapping the patterns by
hand and obtain a casting closer to pattern , as the vibrator is attached to the
frame ...
Vibrator Frame By attaching the patterns to a vibrator frame and having a good
hard - sand match ( Fig . 6 ) , you save the time used in rapping the patterns by
hand and obtain a casting closer to pattern , as the vibrator is attached to the
frame ...
Страница 220
7 Patterns Mounted on Wood Boards method makes a very good and cheap
pattern equipment and gives good results . The board should be made from good
dry stock . ( Ash or oak makes a good board . ) The board may be built up with at
...
7 Patterns Mounted on Wood Boards method makes a very good and cheap
pattern equipment and gives good results . The board should be made from good
dry stock . ( Ash or oak makes a good board . ) The board may be built up with at
...
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