Designing for Mouldability: How to Save Time and Cost in Plastic Part Development

If you want your next injection moulded product to launch smoothly, mouldability needs to be built into your design from the start.

At Great Central Plastics, our in-house team regularly supports customers with early stage design reviews to help them avoid common pitfalls, saving both time and tooling costs.

Here’s how smart design reduces cost and delays:

• Wall thickness: Uniform walls help prevent defects like warping or sink marks.

• Draft angles: These allow the part to release cleanly from the mould.

• Material choice: Some plastics flow better than others; match material to geometry.

• Branding elements: Embossed logos or textures should be engineered with tooling in mind.

• Undercuts and parting lines: Avoid unnecessary complexity where possible. Simple geometry speeds up tooling and reduces wear over time.

• Ejection and cooling: Proper allowance for ejector pins and cooling channels supports faster cycle times and part consistency.

The Benefits of Early Collaboration

By partnering with an experienced plastic injection moulder early in your design process, you reduce the risk of costly rework and delays when it matters most. This collaboration ensures your product is optimised for manufacturability from day one.

Our team works with businesses of all sizes, from start ups launching their first product to experienced buyers fine tuning a new part.

Whether you're creating reusable cups, branded merchandise, or technical components, our plastic injection moulders bring decades of experience to help you get it right the first time.

For more information on Designing for Mouldability: How to Save Time and Cost in Plastic Part Development talk to Great Central Plastics Ltd