Cast Iron Molding & Tooling
Cast Iron is an iron alloy that contains roughly 2-4% carbon and some amount of silicon and manganese. It is a metal used for injection molding in a myriad of industries. The Chinese produced cast iron as early as the 6th century BC. Cast Iron was used throughout the world in the 18th and 19th centuries and was even used in some of the earliest skyscrapers in the 20th century. Steel came to replace cast iron's many applications in the 20th century; however, cast iron continues to have many industrial applications for molding small metal & plastic parts that don't require high load-bearing strength.
Cast iron is made by reducing iron ore in a blast furnace. The process of cast iron begins with the placing of pig iron in a furnace with other alloys and melting it until a molten mixture can be obtained. Then the mixture is poured in casts or molds shaped to the dimensions of the product or part you wish to manufacture. Lastly, the mixture is left to solidify.
There are four main types of cast iron alloys based on the color and flexibility of the material:
- Grey iron: contains more silicon and is less hard and more machinable
- White iron: contains less silicon but is stronger
- Malleable iron: white iron transformed into graphite and ferrite plus carbon
- Ductile iron: spongy steel properties; flexible and can be cast with larger sections
Advantages of Cast Iron
- Excellent castability: flexible metal that can be molded into many different parts for various industries
- High machinability with graphite cast irons
- Good fluidity
- High wear resistance
- Antivibration properties
- Low-stress concentration
- Resistant to oxidation
- Fire resistant
Cast Iron Industrial Uses
The exact cast iron composition you require depends on the application of the molded metal. Our expert metal molding technicians can help determine if cast iron will work for your intended processes. Mantz Automation’s mold specialists create cast-iron molds for a variety of industries, including:
- Home appliances
- And more
The experts at Mantz Automation, Inc. create cast-iron molds to match your exact specifications and exceed your expectations. Through our specialty CNC machining, we offer domestic and international companies cost-effective production on custom projects.
Different mold making styles for every project
Typical applications for cast iron molds include a wide variety of gears, die inserts, automobile crankshafts, and many other machine parts. We’re able to create molds to your exact specifications through:
- Two-Shot Molding
- Insert Molding
- Thin Wall Molding
- Cavitation Molding
- Direct Injection Molding
- Technical Injection Molding
- Foam Molding
- High Pressure Molding
- Reaction Injection Molding
Although the material cost is higher than steel, when used for specific applications a cast iron mold offers increase the durability while requiring little to no maintenance.
Mantz Automation designs injection molds for a variety of plastic and metal materials including ABS Plastic, Polyethylene, PVC Plastic, Polycarbonate, Polystyrene, Polypropylene, Polymer, Resin and Nylon. We make molds from various metal materials including H-13 Steel, S-7 Steel, P-20 Steel, Aluminum, MoldMAX®, and AMPCO™.