Injection Molding Prototypes

A primary concern for any manufacturer is confirming the products they bring to market are optimally designed, aesthetically pleasing and functional. Confirm the plastic components or assemblies your design produces perform as intended with high-quality prototyping services from Bruin Manufacturing.

Request A Quote


Bruin hot runner prototype/bridge mold base with changeable prototype inserts.

Prototype Plastic Injection Molding Services

We are a full-service plastic injection molder specializing in the in-house development of affordable tooling used to produce prototypes, one-offs, and low-volume pieces. This process enables our customers to inspect, test and scrutinize finished products, tweaking and resolving all details to ensure the best possible outcome, without the high cost of a full production run.

There are many reasons to prototype before starting full-scale production. Examples include:

  • Quality assurance purposes
  • Consumer research
  • When significant testing or proving is required
  • Show buyers a finished part instead of a sketch, drawing, or rendering

Injection Molding Prototype Quality

Deciding to prototype doesn’t have to mean lower quality. At Bruin Manufacturing, our prototype molds are made from the same high-quality steels as standard production ones. Mold bases are manufactured from lightweight but corrosion-resistant stainless steel. Hardened tool steel inserts and cores provide robust strength.

When you are ready to begin full-scale manufacturing, we can produce from the prototype die while the full production mold is built. Our approach offers the following benefits:

  • Shortens lead times
  • Reduces costs
  • Improves throughput

Customers seeking orders of more than a few thousand cycles are encouraged to move away from prototype dies and toward standard molds, which can withstand faster cycle times and higher production levels. Every standard mold we fabricate adheres to the Society of Plastics Industry’s Class 101 standard.

Injection-molded prototypes can be very beneficial to making a successful product. It enables you to verify part engineering, display a finished product or eliminate imperfections before investing in mass production. With Bruin Manufacturing, we can help you get there.

For more information about our prototyping services, contact our team.


Headquartered in Marshalltown, IA since 1949

At Bruin Manufacturing, we are the small parts problem solvers. We offer total, integrated custom injection molding services that can meet your needs for quality, time, and price.

About Bruin Manufacturing Our Quality Standards