What is tooling?

To put it simply, tooling is the backbone of the physical production of a product.  Much like how you could not make muffins without a muffin tin, many consumer products need their own version of a “muffin tin” in order to be mass-produced. For many, this is the non-glamourous side of production but without it, products simply do not exist.  The term “tooling” refers to any number of implements required to produce a product.

Mold of lion head

Injection Mold

This is one of the most common forms of tooling. Most commonly, this will be a block of steel or alloy that is precision machined as a negative of the part being produced.  In it’s simplest form, it is a two part core & cavity the closes up with hydraulic pressure. A hopper filled with plastic pellets is melted and injected into the cavity under high pressure to take the shape of the part being produced within the mold.  Once cooled, the two halves of the mold are separated and the plastic part is ejected from the mold. There is always some post-processing that takes place to remove any bits of plastic from the injection point but essentially, once it is out of the mold, the part is ready for assembly or post-processing which can include painting, chrome plating, or printing with additional elements like a company logo etc. This is how pen caps, food storage containers and your key FOB are produced.

injection molded plastic

Blow Mold

This is another common form of tooling and one that is simpler in construction than an injection mold because it only requires a cavity and no core.  This type of tool is also precision machined from a block of steel or alloy to create a negative of the part being produced. In production, The two halves of the blow mold cavity come together to pinch a curtain of melting plastic, trapping it within mold.  A small injector (essentially a needle) also trapped between the two halves, blasts air into the middle of the curtain of melting plastic, sending it outward against the walls of the mold to take the shape of the final product. Once cool, the mold opens up and the part is ejected with a hollow inside. This is how pop bottles, water jugs and oil bottles are produced.

Tooling for blow molding

Rotational Mold (Roto Mold)

This is somewhat similar to a blow mold in construction but the process is quite different.  With this type of tool, the two cavities come together with a pre-measured quantity of plastic pellets inside the mold. The mold is then heated while being rotated on multiple axis until the plastic with the mold melts and coats the inside of the mold. The process or “cycle time” is much longer than blow molding but it is well suited to producing very large parts and parts that require a thicker wall.  This is how some kayaks are made as well as large water holding tanks, children’s playground sets etc.


In its most basic sense, a tool is simply a working or manufacturing aid that is required to make a product or part. They can include dies, gauges, molds, jigs, and cutting equipment. While tools can be used for general purposes (cutting equipment and screwdrivers) in the case of most of our clients, when manufacturers are referring to tooling, it’s generally in a highly specialized sense – as one of the molds mentioned above.

rotomold kayak production

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