Is Prototyping a Custom Injection Mold Important?

September 22, 2024

Creating a custom injection mold for your product or component can be a substantial commitment of time and resources, therefore it makes sense to take advantage of any opportunity to spot design flaws and identify potential improvements at the earliest stage possible. Prototyping custom molded plastics, especially with the rise of fast, cost-effective 3D printing, is one of the most efficient ways to do so.

What Is a Custom Injection Mold?

A custom mold is not just the creation of a new mold to make a plastic product which hadn't existed before that time. Properly done, custom molding is a multi-step process starting with a review and analysis of product specifications, prototype or custom mold design and creation, testing, and finally, production.

Why Should You Prototype a Custom Injection Mold?

Prototyping a custom mold is a worthwhile investment in the early stages of production, saving you time and resources in the long run, by providing opportunities to:


  • Spot design flaws which are likely to make production too slow or costly.
  • Identify areas to enhance a product's design, appearance, durability, and functionality.
  • Explore the look and feel of the real product rather than a two-dimensional representation, a step which frequently prompts design adjustments.
  • Evaluate material choices for their suitability, including such aspects as strength and durability.
  • Allow product testing as early as possible in the manufacturing process, so any weaknesses or functional concerns can be addressed.
  • More accurately assess realistic manufacturing costs, including production time and materials.
  • Envision ways to simplify or streamline product design or aspects of production such as by combining components or adjusting needed mold tooling specifications for added efficiency and reduced costs.
  • Reevaluate a product's usefulness and marketability before committing to full-scale production.


At Bennett Plastics, we offer decades of experience with a full range of plastics manufacturing services, from design and prototyping to production and fulfillment. Contact us today to learn more about our capabilities.

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