1 Define Your Product Idea

Start by clearly defining the problem your product will solve. Identify the target user, key features, approximate dimensions, and how the product will be used.

A simple sketch can help communicate your idea before creating a digital design. Consider the product's shape, moving parts, assembly requirements, and expected working conditions.

2 Create a 3D CAD Model

Once the idea is clear, convert your sketch into a 3D computer-aided design (CAD) model. The model defines the product's dimensions, geometry, assembly features, and other design details.

CAD software allows designers to adjust dimensions, check clearances, and prepare a model for 3D printing. For plastic products, wall thickness, snap-fit features, and part orientation should be considered during the design stage.

Need help with the design stage? Explore product design and reverse engineering services to develop your concept into a usable digital model.

3 Select the Right 3D Printing Material

The material depends on what you need to evaluate. Some prototypes are made to check shape and appearance, while others need to withstand handling, movement, or basic functional testing.

Always select the material based on the prototype's intended use, required strength, surface finish, temperature exposure, and testing conditions.

4 Print Your Physical Prototype

After preparing the CAD model, export it in a compatible format such as STL or 3MF, then prepare it using slicing software. The slicing process converts the model into instructions for the 3D printer.

Important settings include:

• Layer height and print resolution
• Infill percentage and internal structure
• Wall thickness and shell count
• Support structures and print orientation
• Printing speed and material temperature

These settings affect the prototype's appearance, strength, printing time, and cost. After printing, remove supports and complete any required finishing before evaluation.

5 Test, Evaluate, and Improve

A prototype helps you identify design issues before committing to production. Check the model against your original requirements and record any changes needed.

• Verify dimensions and overall fit.
• Check assembly and moving components.
• Evaluate grip, ergonomics, and ease of use.
• Identify weak areas or unwanted interference.
• Collect user feedback where appropriate.
• Update the CAD model and print another version if required.

Several iterations may be necessary. Making changes digitally and printing an updated version can be more practical than committing to tooling before the design is validated.

6 Move From Prototype to Manufacturing

Once the design has been validated, assess how the product will be manufactured at the required quantity and cost. The best production method depends on the product's geometry, material, expected demand, finish, and quality requirements.

For many plastic products, injection moulding may be suitable for higher-volume production. However, mould design, tooling costs, tolerances, and manufacturability should be reviewed before proceeding.

Plastic Junction can help you explore the next steps through product development and manufacturing-related services: