The Long History of Investment Casting
Investment castings are one of the oldest forms of casting in the world. In fact, ancient civilizations used investment casting long before modern factories and manufacturing processes use the technique. The fact that the investment casting process is still in use today just goes to show that just because a process is old, does not mean that it is the best method for the job. Explore the history of investment casting and discover why this ancient process is still in use in modern manufacturing.
Ancient civilizations used investment casting made from beeswax over 5,000 years ago. The ancient process of creating the castings was slightly different from today’s method, but the basic process was the same. The craftsman created the casting from beeswax, using hot tools, melted wax, and shaving tools to create the desired shape. The craftsman then made a mold based on the wax shape. The craftsman then filled the mold with a thin coating of melted wax. The craftsman then coats the wax mold in ceramic to create a perfect mold of the wax shape. The craftsman then allowed the ceramic mold to dry and used it to create a metal object that looked like the original wax design. This process was commonly used to create religious objects, decorative objects, and jewelry.
The investment casting process of today is similar to the ancient process. The main difference between the two processes are the tools and materials involved. The basic construction process remains the same. Modern factories may make molds from rubber, ceramic, metal, or wood. They also make the finished objects from a variety of materials, including metal, plastic, and ceramic. Many of our modern objects still use this creation process, including toilets, rotors, machine parts, and many other pieces.