| PERMANENT
MOLD
ATD Engineering & Machine has been designing and building
permanent and semi-permanent mold machines and systems for aluminum
casting production for over 30 years.
Types of permanent mold equipment and systems we provide include:
- Static Cast
- Piston Cast
- Tilt Pour
- Reverse Tilt Pour
- Rotary Turntables
- Low Pressure
Aluminum permanent mold castings are widely used throughout industry.
As the United States government mandates more fuel-efficient cars,
the demand for permanent mold castings has steadily increased. Suspension
components, intake manifolds, pistons, and other functional parts
of internal-combustion engines are typical applications. Other applications
include aviation engines, missiles, motor housings, portable tools,
nozzles, fan cases, outdoor lighting standards, gear cases, lawn
mower chassis, barbecue grills, and kitchen pots and pans.
Advantages of Permanent Mold Castings:
Dimensional accuracy is superior to sand or shell mold castings,
because the mold is rigid and does not allow mold wall movement
during solidification. Additionally, dimensional repeatability is
improved.
Because permanent mold castings are chilled castings, they are generally
sounder than sand castings.
Permanent mold castings are generally stronger than sand or die-castings
and are less porous than die castings.
Castings produced in the permanent mold process have finer dendritic
arm spacing (DAS) and grain structure. The finer structure displays
better strength properties than those cast in similar alloys in
sand castings.
Permanent mold castings have fewer inclusion defects than sand castings.
Therefore, the casting designer has the freedom to use thinner sections
and lighter weight designs.
Permanent mold castings have a higher degree of reliability with
regard to pressure applications of fluids and gases.
Generally, permanent mold castings require less finishing than sand
castings. Permanent mold castings have a smoother as cast surface
finish than sand casting and finishes approaching 100rms can be
achieved. In many cases casting buyers can use as cast surfaces
without subsequent finishing for cooking utensils, hardware items,
automotive parts, and ornamental work.
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