Design Choices to Reduce Thermoforming Costs

Reducing Secondary Operations

Overview

Secondary operations—such as trimming, drilling, cutting, bonding, and assembly—add time, cost, and variability to thermoformed part production. While sometimes unavoidable, excessive reliance on post-processing reduces overall manufacturing efficiency.

At HIPLEX, we design parts to minimize or eliminate secondary operations, integrating functionality directly into the forming stage.

Why Reducing Secondary Operations Matters

Every additional step introduces complexity and cost.

Common impacts:

• Increased production cycle time

• Higher labor and tooling costs

• Dimensional variability and quality inconsistencies

• Additional handling and risk of damage

• Reduced scalability for high-volume production

Optimizing design upfront leads to streamlined manufacturing.

Key Design Strategies

Well-designed part geometry and radii eliminate the need for many post-processing steps by enabling clean forming and trimming.

Optimized multi-cavity tooling design further reduces handling by enabling efficient, high-volume production in a single cycle.

1. Feature Integration

• Incorporate holes, slots, and cutouts into the forming process

• Use molded-in features instead of post-machining

• Design self-locating and interlocking elements

This reduces the need for drilling, routing, or assembly.

2. Trim Optimization

• Simplify trim lines for clean, repeatable cutting

• Avoid complex contours requiring manual trimming

• Design consistent flange widths
  
  Uniform wall thickness design reduces trimming complexity and eliminates the need for corrective machining.
  Designing with proper draft angles minimizes sticking issues and reduces manual intervention during part removal.

Efficient trimming improves speed and accuracy.

3. Snap-Fit & Assembly Design

• Replace fasteners with snap-fit or press-fit features

• Integrate joining mechanisms into part geometry

• Reduce multi-component assemblies

Fewer parts = fewer operations.

4. Tolerance Alignment

• Design with achievable thermoforming tolerances

• Avoid features requiring tight post-machining

• Align functional requirements with process capability

This prevents rework and secondary corrections.

5. Tooling-Assisted Features

• Use tooling to pre-form critical features

• Integrate embossing, ribs, and locating features

• Minimize reliance on downstream processes

Smart tooling reduces downstream effort.

HIPLEX Design Approach

We apply DFM (Design for Manufacturing) principles to eliminate unnecessary steps:

Design → Tooling Integration → Process Optimization

• Early-stage design review for secondary operation risks

• Feature redesign for in-process formation

• Tooling strategies to integrate functionality

• Cycle time and cost optimization

Before vs After Optimization

Before:

• Multiple trimming and drilling steps

• Manual assembly processes

• High labor dependency

After HIPLEX Optimization:

• Integrated features within formed part

• Minimal post-processing

• Faster, repeatable production

Key Benefits

• Reduced production time

• Lower labor and operational costs

• Improved consistency and quality

• Faster scalability for high-volume production

• Reduced risk of handling damage

Design Guideline Snapshot

• Integrate features into primary forming process

• Simplify trim paths and edges

• Use snap-fit or molded joining features

• Design within process tolerances

• Minimize part count and assembly steps

Conclusion

Reducing secondary operations is a direct path to leaner, faster, and more cost-effective manufacturing. With HIPLEX, every design decision is aligned to eliminate unnecessary steps and maximize production efficiency.

Explore Complete Design Guidelines

Explore our complete Thermoforming Design Guidelines to understand how geometry, tooling, and process optimization work together to deliver consistent, high-quality production.