Plastic Prototype

A plastic prototype allows our customers to determine the fit and functionality of a plastic injection molding component without the need for large upfront capital investment. Plastic prototype development is considered to be a very important step in the plastic injection molding process. We have found that prototyping allows for better communication as our clients can interact with an actual plastic component sample instead of discussing an abstract idea. Product prototypes also allow us to learn more about the products our customers want produced.

Plastic Prototype Development Process

Below are the steps of our plastic prototype development process.

  • Determine the scope of the project
  • Review/creation of engineering drawing
  • Customer approval
  • Prototype mold created
  • Sampling
  • Pilot production run
  • Final modifications before full production
  • Determine project scope

In most cases, our customers submit a drawing or sketch of their proposed project. Before we manufacture any plastic component or part, we strive to fully understand our clients’ requirements and what they are trying to accomplish. To do this, we meet or speak with our clients to determine features and functionalities they need.

Creation of Engineering Drawing

The next step is designing the blueprint for the product. A drawing, sketch or artwork is reviewed with the client and engineering drawings are created if needed. This allows designers and engineers to better visualize what the plastic component will look like and how it will function.

Customer Approval

Once an engineering drawing is complete, we send over to the client for review and approval. If the drawing is off in any way or if there are missing requirements, modifications to the drawing will be made.

Prototype Mold Created

Once the client has approved the design, a mold is created using plastic injection molding and samples run to make sure the product is exactly as envisioned.


Samples from the prototype mold are then sent to the client for approval before production. If a client’s requirements are not fully met or have changed, the mold will be modified and additional samples will be sent to the client until they are satisfied.

Pilot Production Run

Before full production starts, a pilot production run is done to determine how design and chance variations could affect production on a larger scale. Any necessary modifications will be made based on client feedback.

Final Modifications are Made Before Full Production

Before full production takes place, final modifications will be made to make sure customers get exactly what they need.

For the convenience of our customers, molds are warehoused at Denbro Plastics for easy re-running.

Read more about our custom plastic molding process.

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