Is injection molding cheap?

Molding costs are related to the number of cavities in the mold. Fewer cavities require less machining effort, reducing manufacturing costs for making injection molds. The complexity of the part design also affects cost, including factors such as surface finish, tolerances, threads, detailing, and a number of undercuts. Adding details like these will add to the cost as they require more tooling.

The most cost-effective type of injection molding is rubber injection molding, which produces high-volume durable products. Additionally, a consistent vulcanization process with precise temperature control can reduce costs by reducing scrap.