Small Cast Door
Small cast door is
the small doors made by cast iron, which
was also called as small casting door,
stove casting door or cast iron door.
There are many types of cast doors
according to the application. Such as
the cast doors used on the boilers, they
are called ash door, the cast doors used
on the furnaces, fireplaces and stoves.
You could call them as stove door. Small
cast door means their size is small,
usually from dozens of millimeter to
hundreds of millimeter.
The materials were used for small cast
doors include grey iron, ductile iron,
alloy cast iron. Most of material is
grey cast iron
ASTM A48 Class 30, Class 20
,or gray iron
DIN EN1561 EN-GJL-200,
EN-GJL-150, or grey iron FC150, FC200.
In order to improve its fire-resistant
property, usually require to add some
content of Chrome (Cr) alloy. 1% Cr
should be good for this purpose.
As for the small cast door,
Dandong Foundry usually made
the larger cast doors by green sand
floor molding process, made the smaller
cast door by resin sand shell molding
process. Usually, the automatic molding
line is not suitable for small cast
doors since the hot cast doors need to
stay in the sand molds for over one
night to avoid the deformation.
Of course, for cast doors, the surface
quality must be very good. In order to
meet the surface quality, Dandong
Foundry use the fine sands and precoated
resin sands as the molding materials.
As for buyers, the surface quality will
be the first inspection point, then the
flatness will be also very important.
Although material is not very important,
the suppliers should meet the standard
for materials, otherwise, the cast doors
are easily crashed.
Usually, most of cast doors do not need
polish. If you need, you
should denoted them on the drawings or
in your inquiry, and the coating
requirements are also important to the
cast doors, such as painting,
galvanizing, anti-rust methods.
There are many iron foundries in China
could produce cast iron doors, however,
only few of them could make them very
well. The most difficulty for producing
them is keeping the good surface