Three Considerations to Make When Choosing a Metal-Casting Process

3 October 2018
 Categories: , Blog


Two of the most common methods of creating designs out of bronze are investment casting and die casting. Investment casting involves the creation of a wax pattern on a ceramic container. The wax is melted and the resulting structure used to create designs. On the other hand, die casting involves forcing pressurised, high-temperature metals into a die cavity. When the metal cools down, it takes the shape of the die cavity. There are factors to consider when deciding between die casting and lost wax casting.

The complexity of the design

Die to cast is ideal for designs which are simple and uncomplicated. Since the die cavities are permanent, you cannot keep reshaping them and incorporating small details such as logos and other writing. On the other hand, lost wax casting offers you a lot of flexibility when you need intricate designs and features to be part of the final product of your design. Lost wax casting is also better when it comes to precision of dimensional results.

Production scale

Die casting involves less preparation and tooling costs, which makes it ideal for productions that are generic and where volumes are needed. On the other hand, investment casting will not be suitable for large-scale production because it does not handle applicability of design as well as die casting. If you have a large production, die casting is the way to go.

Size and tolerance

Die casting is less restrictive than lost wax casting when it comes to large and heavy objects. When investment casting is used for large-scale projects, the pattern will have to be gated to reduce the possibility of dripping, and this puts a limitation to the maximum design size. Die casting on the other hand only depends on the dimensions of the die made to determine the size of the resulting object.

Finishing needs

When bronze is fabricated using die casting, it ends up with rough edges which need a lot of machining to smooth over. On the other hand, parts that are made with investment or lost wax casting are more precise, which means they need less machining and finishing to look perfect.

Other considerations to make include tolerance of the product and the cost of production. Before deciding on a casting method to handle your bronze casting processes, think about your desired result. Pick the way you feel will give you the best outcome while at the same time maintaining effective production efficiency.