What is a sand casting?
- A sand casting is a manufacturing process that utilizes sand as the molding material to create a metal component “casting”. The sand is mixed with a bonding agent and water so it will hold its shape during the manufacturing process.
How is a sand casting made?
- The sand casting process begins with a pattern. The pattern includes a physical replica of the casting and a gating system, which is the delivery channels for the molten metal. The pattern is comprised of two halves called a cope (top half) and drag (bottom half). Sand is pressed molded around the cope or drag patterns separately. The patterns are removed from the molds, creating negatives of the pattern equipment. The cope and drag molds are placed together and then molten metal is poured down a hole called a sprue to fill the negative areas created by the pattern.
What are the advantages of a sand casting?
- Less expensive than other manufacturing processes such as the investment casting process.
- Sand castings can conform to final shapes, reducing the amount of excess material.
- Shorter lead times due to the manufacturing process of sand castings.
- Pattern equipment is typically less expensive than the other methods of manufacture.
What is the largest size casting you can make?
- The largest size casting we can generally manufacture must fit into a 26" x 26" square.
What is your typical lead time?
- Lead times for initial first run products can range from 3 weeks to 9 weeks depending on a number of factors such as; complexity of pattern construction, the use of cores, auxiliary services such as machining/NDT testing/heat treating. Lead times for production run items typically range from as little as 1 week to 6 weeks also dependent on the auxiliary services.