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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 quality.

 

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