Injection Molding 101

WHAT IS A MOLD?

A mold is the tooling necessary to make plastic components. The mold is a metal (steel or aluminum) block that is divided into two halves. Each half has a cavity shaped as the negative of the part. The two halves placed together and liquid plastic injected into them is what creates a plastic part.


WHAT IS A CAVITY?

Think of a cavity as an indentation in the mold that will allow the molten plastic to flow into to take shape of the desired product.


WHAT IS A FAMILY MOLD?

A family mold is a mold that consists of two or more parts of the same product, or parts of multiple products. An example would be a container and its lid being produced with the same mold.


WHAT IS A MULTI-CAVITY MOLD?

This is not the same as a family mold. A multi-cavity mold is a mold consisting of cavities of the same product. For instance, a remote control requiring a front, a back, and a battery cover can all be made into a family mold. A multi-cavity mold could be used for plastic forks, for example, where one mold would have many cavities, producing more than one piece per shot.


WHAT IS THE LIFE OF MY MOLD?

We offer entry level, mid level, and mass production molds based on the customer's needs and product specs.

Entry level molds made out of aluminum have an approximate 2,000 unit mold life or more depending on product complexity.

Mid-level molds made out of P20 steel and typically have a life ranging from 10,000 to 50,000 pieces.

Mass production molds are made out of hardened steel and usually have a life of 50,000+ pieces.

For production runs between 2,000-10,000 pieces, our team considers project requirements to determine the most appropriate mold for our clients.