Investment Casting & Sand Casting Foundry

Castings of Stainless Steel, Alloy & Carbon Steel, Cast Iron, etc.

Lost Foam Casting

Lost Foam Casting Foundry

Lost foam casting, also called full mold casting or cavityless sand casting, uses lost foam patterns made from expandable polystyrene, EPS. The EPS positive patterns are mounted to a dry sand casting system. After dressing, the pattern clusters are inserted into pouring vessels, which are then filled with unbound quartz sand. During casting, the patterns remain in the compacted sand mould. The foam pattern is directly vaporized during the metal casting process, so the lost foam casting does not require mold removal.

For the production of castings with complex structure, RMC Foundry has the lost foam casting system as well as several foam and gluing machines. The lost foaming process is considered to be the most suitable casting process for the large scale metal parts with complex structure, with weights of 0.2 kg to around 500 kg or more.

China lost foam casting factory

Foam Patterns

What We Can Achieve by Lost Foam Casting

 • Max Size of Lost Wax Castings: 1,000 mm × 800 mm × 500 mm

 • Casting Weight Range: 0.5 kg - 100 kg

 • Annual Capacity: 2,000 tons

 • Casting Tolerances: On Request. 

China lost foam casting company

What Metals and Alloys We Cast by Lost Foam Casting

• Cast Iron: Gray Iron, Ductile Iron (Nodular Iron), Malleable Iron
Aluminium and Its Alloys.
• Carbon Steel: Low carbon, medium carbon and high carbon steel from AISI 1020 to AISI 1060.
Cast Steel Alloys: ZG20SiMn, ZG30SiMn, ZG30CrMo, ZG35CrMo, ZG35SiMn, ZG35CrMnSi, ZG40Mn, ZG40Cr, ZG42Cr, ZG42CrMo...etc on request.
• Stainless Steel: AISI 304, AISI 304L, AISI 316, AISI 316L and other stainless steel grade.
• Duplex Stainless Steel, Super Duplex Stainless Steel
• Brass, Bronze and other Copper-based Alloys.
• Wear-resistant Steel, Heat-resistant Steel and Special Steel Alloys.

Foam Patterns for Lost Foam Casting Process

Foam Patterns

Steps of Lost Foam Casting

During lost foam casting process, the sand is kept dry and not bonded and a foam pattern is used to form the shape of the desired casting. The foam pattern is "invested" into the sand at the Fill & Compact process station allowing the sand into all voids and supporting the foam patterns external form. The sand is introduced into the flask containing the casting cluster and compacted to ensure all voids and shapes are supported.
1- Use foam molds to produce foam patterns and casting gating systems
2- Bond the patterns and runners to form a mold bundle module
3- Dip paint on the module
4- Dry the paint
5- Put the module into the sand box and fill it with dry sand
6- Vibrate molding in order to fill the cavity with dry sand and then compact the molding sand
7- Pouring molten metal to vaporize the foam and then forming the desired castings
8- After the castings have cooled, clean the castings. The dry sand can be recycled

shell drying for lost foam casting process

Foam Patterns

What Facilities We Rely On for Lost Foam Casting

Sand Processing Equipment at China casting foundry

Sand Processing

sand process for lost foam cast process

Sand Process

Foam Patterns for Lost Foam Casting Process

Foam Patterns

foam patterns at China casting foundry

Foam Pattern

foam patterns for gray iron castings

Foam Pattern Making

foam pattern making for lost foam casting

Pattern Making

lost foam master for casting foundry

Foam Pattern

Foam Pattern Coating

Typical Lost Foam Castings We Are Producing

lost foam casting-gearbox housing (8)

Cast Steel Parts

gray iron lost foam casting product

Custom Lost Foam Casting

gray cast iron lost foam casting

Gearbox Cover

iron lost foam casting product

Gearbox Cover

lost foam casting gray iron gear housing

Gearbox Housing

lost foam casting gray iron product

Lost Foam Castings

aluminium lost foam casting product

Aluminium Lost Foam Casting

transmission gearbox-gravity die casting-aluminium alloy

Aluminium Casting Gear Housing

We Can Do More by Lost Foam Casting and Others

RMC provides a comprehensive line of lost foam equipment, including flask pouring, flask handling and flask compaction. Our line of foam bead processing equipment is recognized world wide as the industry standard.
- Engineering team whose members are focusing on metal casting field.
- Extensive experience with complex geometries parts
- A broad range of materials, including ferrous and non-ferrous alloys
- In-house CNC machining capabilities
- One-stop solutions for castings and secondary process
- Consistent quality guaranteed and continuous improvement.
- Teamwork including toolmakers, engineers, foundryman, machinist and production technicians.

grey cast iron lost foam casting products

Gray Iron Lost Foam Casting Products