Instructions for Use (IFU) for Investment casting and castable workflows
This document provides application-specific instructions for investment casting and castable manufacturing workflows using 3Dresyns® photopolymer resin systems.
This IFU must be used in conjunction with:
- Instructions for Use (IFU)
- Any relevant printer-specific IFU
- Any relevant application-specific IFU where applicable
This document does not replace the general IFU and applies only to workflows targeting castable patterns, precision casting patterns and related burnout-based manufacturing processes.
Scope of application
This IFU applies to:
- Printed castable patterns for investment casting workflows
- Jewelry and precision casting pattern production
- Photopolymer systems used as sacrificial pattern materials prior to burnout or equivalent downstream removal step
- Relevant SLA, DLP, LCD and inkjet photopolymer workflows where the selected castable material is applicable
This IFU does not replace:
- Foundry-specific or jewelry-laboratory-specific process validation
- Burnout program qualification for the selected investment system
- Material-specific TDS, CRT or structured calibration workflows
- Any downstream metallurgical or foundry process requirements
Nature of castable workflows
Castable performance is not determined by printability alone. Final success depends on the full chain including:
- Resin formulation and version
- Printer technology and curing behavior
- Exposure strategy, wall thickness and support design
- Cleaning and post-curing conditions
- Burnout schedule and investment system
- Geometry-specific thermal behavior during downstream processing
A pattern that prints well may still fail in burnout or casting if the full workflow is not controlled.
Workflow objectives
- Achieve stable and reproducible printed patterns
- Maintain dimensional fidelity and surface detail
- Control support placement and removal on critical surfaces
- Implement cleaning and post-curing conditions that do not compromise burnout performance
- Validate the full pattern-to-casting workflow with the selected downstream process
Printing considerations
- Use validated print settings for the selected castable system.
- Orient parts to reduce support marks on critical visible or functional surfaces.
- Wall thickness, mass concentration and geometry may affect downstream burnout behavior and must be considered during design and validation.
- Changes to exposure strategy or build layout may alter final burnout behavior and should be re-validated.
Cleaning and post-curing considerations
- Cleaning must remove uncured resin without distorting fine casting geometry.
- Over-washing or uncontrolled post-curing may change pattern behavior during downstream thermal processing.
- Post-curing must follow validated conditions for the selected castable material system.
- Final workflow must be qualified with the intended investment and burnout process.
Downstream process responsibility
Investment quality, burnout ramp, hold times, furnace behavior, flask size, geometry mass and foundry practice strongly affect final results. These variables remain outside the scope of the base IFU and must be validated by the user.
Quality control and validation
- Verify printed pattern fidelity before investment.
- Validate burnout compatibility and downstream casting performance using representative geometries.
- Do not extrapolate from one casting geometry or one furnace program to all designs without confirmation.
- Final suitability for the intended casting workflow remains the responsibility of the user.
Interpretation principle
3Dresyns® castable materials must be understood as professional manufacturing materials for pattern production workflows. Successful casting depends on the integration of printing, cleaning, post-curing, investment and burnout into one controlled process chain.