Lost Foam mould casting

Ruican Machinery has more than 10 years experience for sand casting.OEM foundry Lost Foam mould casting,ductile iron casting, green sand casting, aluminum sand casting and all kinds of cast iron.

Material: Ductile iron GGG 40 to GGG 80 / Grey Iron
Carbon steel 1025 to 1045
ASTM 60-40-18 / 65-45-12 / 80-55-06 / 100-70-03
Austempering ductile iron
Heat resistant steel / Wear resistant steel


Product Scope:
Auto Parts Casting
Pump & Valve Casting
Transmission Gear Box
G.E.T. (Teeth & Adaptor) Casting Parts
Hydraulic Machine Castings
Mining Machinery Casting Parts
Railway & Train Casting Parts
Tractor & Agricultural Machinery Parts
Heavy Duty Truck Parts

Capability & Capacity
Certificate      TUV ISO9001 / TS 16949
OEM               OEM & ODM both accepted
Standard        ASTM, SAE, JIS, BS, DIN, ISO, GB
Capacity        1000 - 1500 tons / month
Weight            50g - 100 tons
Software         Pro/E, Auto CAD, Solidwork, CAXA, UG. etc.


The lost foam casting process utilizes injection modeled polymeric foam patterns for the production of metallic components. Foamed polymer patterns of the desired shape are coated with a water-based refractory slurry, dried and embedded in unbonded sand. Molten metal is poured directly on the coated polymer. The polymer undergoes thermal degradation and is gradually replaced by the liquid metal to yield the casting after solidification. Expanded polystyrene (EPS) is the most common pattern material used in commercial practice. The use of EPS patterns with ferrous castings may result in the formation of carbonaceous defects in the casting. Consequently, polymethylmethacrylate (PMMA) and copolymers of EPS and PMMA have been developed for ferrous castings. The thermal degradation of the foamed pattern results in the formation of gaseous degradation products and of a partially depolymerized viscous residue. The fraction of viscous residue increased with temperature and is essentially constant above about 650 C. During the filling of EPS patterns, nearly 60% of the polymer is converted to the viscous residue and 40% is transformed to gaseous products. In the case of PMM, almost 60% of the polymer undergoing degradation at the metal front is transformed to gaseous products. The melt flow velocity during the filling of the mold generally increases with temperature

Advantage:
1).The dimensions and outside shape are similar with investment casting
2)The surface roughness is good
3)The min. thickness can meet 3mm(0.120inch)
4)decrease the internal crack and keep close structure
5)As no joint and defect,the cleaning and machining work can be less


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Ductile iron with 4.5tons

Ductile iron with 5tons

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Foam moulds Sand blasting