The China Sand Casting Factory
Dandong Foundry is a professional sand
casting factory in China, with over 50 years sand casting production
experience, machining and exporting capability. The followings are
some brief introduction to the production equipments and some sand
Production Equipments of Sand Casting
1. Manual Green Sand Casting Factory
The molding process is completed by workers, so it is manual
molding. This process is very traditional, however, it is still
widely used worldwide, because its flexibility and low production
costs. Just need sand flasks (sand boxes), no special equipments
needed during molding.
2. Green Sand Automatic Molding
Many Chinese foundries are importing automatic molding equipments to
replace manual molding. This equipment can speed up the production
rate, and keep better uniform quality. However, its sand flasks are
fixed, so has requirements to the size of castings, and the annual
3. Resin Coated Sand Casting Process
Resin coated sand mold is a kind of hard molds, so it is suitable to
produce large iron castings with complex structures or higher
dimensional tolerance. However, furan resin is costly, so caused the
production costs higher.
This process needs a set of automatic sand mixture equipments. The
molding process is still manual method.
4. Pre-coated resin sand shell
This process uses pre-coated resin sand as the main molding
material. After heating in the sand shooter equipments, the resin
sand will become very hard, so can produce high quality iron and
steel castings. However, in China, most of sand casting factories
are using this process to produce iron castings, but not steel
Capability of Sand Casting Factory
Most of sand casting factories in China have certain capability of
machining. Most of rough machining could be completed in their
As for precision machining works in large quantity, most of casting
factories can not do. However, there are many professional machining
workshops near casting factories, so they could do the cooperation
to complete the raw castings and machining works together.
Devices of Sand Casting Factory
1. Chemical Components Inspection - Spectrometer
This device can inspect the chemical components, such as C, Si, Mn,
S, P, Mg, Cr, Mo, Ni, quickly and accurately.
2. Cast Iron Micro structure
Inspection - Metallographic Microscope
This device can visually inspect the micro-structure of ductile iron
and gray iron, including the graphite shapes and nodular rate.
3. Brinell Hardness Tester - Desktop,
These testers could inspect the hardness of rough surfaces of cast
4. Destructive Inspection
During sampling stage, destructive inspection could find the small
shrinkage defects more visual and accurate. It is not suitable for
large quantity production, but very useful for inspecting samples
and improving gating system.
Made in the Factory
The followings are some sand castings made in Dandong Foundry
Gray Cast Iron Gas Stove Burner Head made by Shell
Lawn Tractor Axle Support made by green sand casting process.
Boiler Ash Collector tubes made by resin sand casting
Tractor ductile iron brackets made by green sand casting
Foundation plates, both sides grinded, gray cast iron, made by
resin sand casting process
Ductile iron butterfly valve bodies, made by green sand casting
Cradle brackets for trucks, made by green sand automatic molding
line, after zinc plating.