Project Overview

Vacuum casting is a highly efficient prototyping and low-volume manufacturing process used to produce high-quality plastic parts with injection-molding-like appearance and performance.

At DG Proto, we supported a product development project requiring rapid prototype iteration and small-batch functional testing using vacuum casting technology.

The goal was to achieve production-level surface quality and dimensional accuracy while maintaining short lead time and cost efficiency.

Challenge

The client required a solution that could:

• Produce high-quality prototypes closely matching final injection-molded parts
• Support fast design iterations during product development
• Maintain tight dimensional accuracy and consistent replication
• Provide cost-effective low-volume production before tooling investment
• Achieve visual-grade surface finish for presentation and testing

Solution

DG Proto implemented a full vacuum casting prototyping workflow, including master model creation, silicone mold production, and precision resin casting.

Our process included:

• Master Pattern Fabrication
  High-precision CNC machining / 3D printing to ensure accurate master geometry
• Silicone Mold Making
  Durable mold creation for stable replication and multiple casting cycles
• Vacuum Resin Casting
  Air-free casting process using polyurethane resins to eliminate bubbles and defects
• Material Simulation
  Selection of engineering-grade resins to replicate ABS, PC, PMMA-like properties
• Post-Processing & Finishing
  Painting, polishing, and texturing for production-like appearance

Results

The project delivered strong outcomes:

✅ Injection-molding-level surface finish and appearance

✅ High dimensional consistency across small-batch parts

✅ Rapid turnaround enabling faster design validation cycles

✅ Significant cost savings compared to tooling-based injection molding

✅ Functional prototypes suitable for testing, presentation, and pilot use

Why DG Proto for Vacuum Casting

DG Proto provides end-to-end vacuum casting solutions designed for speed, precision, and production realism:

High Precision Replication – Accurate reproduction of master models

Wide Material Range – ABS, PC, PMMA, rubber-like resins, and more

• Fast Prototyping Cycle – Short mold-making and casting lead times
• Production-Grade Finish – Smooth, painted, or textured surfaces available
• Cost-Effective Small Batch Production – Ideal for 1–200 pcs runs
• Full Engineering Support – From design review to final delivery

Applications

Vacuum casting is widely used across multiple industries:

• Product Design & Development – Functional prototypes for validation and testing
• Low-Volume Production – Bridge manufacturing and pilot runs
• Functional Testing – Fit, assembly, and mechanical performance checks
• Marketing & Display Models – High-quality presentation and exhibition samples
• Consumer Electronics – Enclosures, housings, and aesthetic components

Conclusion

This project demonstrates how DG Proto’s vacuum casting capabilities help customers accelerate product development, reduce risk, and achieve near-production quality parts without tooling investment.

By combining precision master model creation, advanced silicone molding, and high-quality resin casting, we deliver prototypes that are both visually and functionally close to final production standards.