Gray and Ductile Iron Foundry

A jobbing foundry for short run and production castings

Gray and Ductile Iron Castings for Industry

Since 1912 in Richmond, Virginia

OK Foundry makes gray and ductile iron sand castings from 1 lb. to 400 lbs. No-Bake cope and drag molding for heavier castings and manual jolt squeeze green sand molding for lighter castings.

Serial production of castings in small batches for lean supply of moderate volumes and project casting for special requirements. Obsolete part casting with base of production casting volume. Economic order quantities as low as 500 lbs. net shipment.

Phenolic Urethane No-Bake (PUNB) Binder for Difficult Castings

To support the widest range of casting sizes, shapes, and configurations, OK Foundry utilizes phenolic urethane binders for cope and drag molding. Phenolic Urethane No-Bake binders (PUNB) create the strongest molds and cores.

Cores made with PUNB binders have superior hot strength and PUNB cores in cold boxes are easily reinforced with steel rods to prevent core bending and breakage.

Cope and drag resin bonded sand molding supports the widest range of tooling and most green sand patterns or foundry patterns from other processes can be run in resin bonded sand. No-Bake molding is appropriate for volume production of heavy section, complex cored and large format castings and castings with green sand patterns in small volumes.

Manual Jolt Squeeze Green Sand Molding for Smaller Castings

Manual jolt squeeze green sand molding is the least expensive process for short runs of light castings, about 15 lbs. or less. Even modern patterns from automatic machines like the Hunter HMP-10 and HLM-10, can be molded on a jolt squeeze machine with a 14 x 19 flask for ramp-up or ramp-down production of light castings that have been setup for automatic molding.

Manual jolt squeeze molding is less expensive to setup and breakdown than automatic molding for economical production of lower volumes of castings or complex castings.  When volumes increase, castings can be migrated back into automatic molding for the lowest cost per part.

Metals

Gray Iron ASTM A48 Class 20, 25, 30, 35, 40
Ductile Iron ASTM A536 Grades 80-55-06, 65-45-12
Aluminum 356.0
Silicon Bronze CDA 873 Everdur

Molding

No-Bake urethane resin bonded cope and drag molding
Manual jolt squeeze green sand molding
3D printed molds and cores
Loose piece molding in resin bonded sand

Services

3D CAD engineering and design (Solidworks)
CNC foundry patterns
Traditional wood patterns

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