| Greensand
Systems
CMI builds durable equipment with field-proven components to withstand
the harsh metal casting environment.
Mold Machines Modifications & Rebuilds
CMI can design, build, or refurbish molding equipment to meet your
specific requirements. Automatic pattern shuttles have been installed
on molding machines to provide quick pattern change and/or inspection.
We have designed and manufactured a complete array of foundry flasks
for automatic mold lines with weighted copes to special round flasks
for floor molding that are 20 feet in diameter. We have also designed
and refurbished many flaskless flasks using special bolt-in replaceable
liners.
Additionally, we have designed and built shockless jolt systems
to replace old and destructive jolting units on older molding machines.
We have also designed, redesigned, and built many squeeze heads
of the compensating design. What’s more, sand aeration has been
added to molding machines to improve the flowability of the molding
sand as it is being placed on the pattern.
Flask
& Mold Handling
CMI has engineered, designed, manufactured, and installed flask
handling equipment for continuous and indexing molding lines. Rates
as high as 300mph with 90 minutes of cooling time have been commissioned.
The lines have been for casting aluminum and ferrous products.
Specialty
Equipment
CMI has been supplying customers with specialty equipment for many
years. In fact, we pride ouselves on specializing in “specialty
equipment”. What it breaks down to is: tell us your problem and
we will design a special machine to solve it.
The machine shown at the right is a special machine that was engineered,
designed, manufactured, and installed by CMI Equipment & Engineering
for a high production ductile iron foundry. The challenge: the customer
was experiencing excessive damage to the castings with his present
two (2) station drag mold casting dumper. The existing unit would
pick up the drag mold at the 6:00 o’clock position in a large wheel,
similar to a ferris wheel. It would elevate it to the 12:00 o’clock
position while inverting the drag mold with castings 180 degrees,
permitting the casting to fall out onto a 45 degree slider plate
and be chuted down onto a casting shake-out deck below. The mold
dumping operation would cause extensive damage and scrap the hot
castings.
The solution, with minimal equipment rearrangement, was to design
a ferris wheel, but design it having four (4) stations. Each station
would have a U-shape yoke that would capture the drag flask (with
bars). The ferris wheel would be lowered (C.C.W. rotation) from
9:00 o’clock mold receiving position to the 6:00 o’clock dump location.
The yoke mold and casting would be rolled 180 degrees C.C.W. dumping
the casting gently onto the S.O. deck. The ferris wheel would rotate
to the 3:00 o’clock position and the flasks would remove from the
yoke. The next index of the wheel would bring the yoke to the 12:00
o’clock position where the yoke would be rotated 180 degrees back
to its original position, ready to receive the next drag mold.
All four yokes are maintained at a “level” position, using sets
of gearing having a stationary sun in conjunction with planetary
and idler gears to constantly position the yoke assembly in a horizontal
location.
In the end, the customer reduced his casting damage and scrap considerably.
Cooling
Blending Equipment
CMI has designed many sand systems that incorporate the following:
A. Blending the sands (S.O., spills,
and new) together while leveling the moisture content.
B. Lump breaking: reducing the
molding sand lumps in the S.O. and spill sands.
C. Cooling: with addition of water
and warm/hot dry air, the sand temperature can be reduced. The air
passing through the drum will remove some of the fines.
D. Sizing: the return sand can
be sized using various screen sizes. This can remove the core butts,
debris, and other undesirable materials from the sand.
We can design a unit that can be installed into your existing sand
system to meet your requirements.
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