National Investment Casting Services
Investment Casting Services for Complex Metal Parts
Move from CAD to a ready-to-pour ceramic shell or finished metal casting without conventional wax-pattern tooling. Rapid Precision Castings uses the DirectPour™ process and LAMP™ ceramic 3D-printing technology to support complex parts, design changes, prototypes, and production programs.
- CAD-driven ceramic shells
- No conventional wax-pattern tooling
- Project-specific engineering review
Service Overview
Investment casting built around your CAD—not a dedicated wax tool
Rapid Precision Castings provides tooling-free investment casting services using ceramic shells produced directly from digital part geometry. The workflow removes the conventional wax-pattern die from shell production. That makes it possible to review geometry, revise the digital mold, and move into casting without first creating and qualifying a dedicated pattern tool.
The service can support two paths: a ready-to-pour shell for a qualified foundry workflow, or an end-to-end project that continues through metal casting and the finishing, inspection, and documentation defined for the job. Alloy, dimensional, testing, and delivery requirements are reviewed against the actual part rather than assumed from a generic process claim.
Complex geometry
Use printed shell geometry to address shapes, integrated features, and internal passages that may be difficult to produce with conventional pattern tooling.
Changing designs
Revise the digital mold when part geometry changes instead of rebuilding a physical wax-pattern die before the next casting iteration.
Prototype through production
Start with development hardware and define the appropriate path for repeat parts, qualification, inspection, and production planning.
Program-specific alloys
Review alloy compatibility alongside geometry, thermal requirements, finishing, and inspection needs. See the published casting-grade alloy options.
Supply-chain alternatives
Evaluate a digital shell route when conventional tooling schedules, unavailable legacy tooling, or supplier constraints affect a program.
Engineering review
Align wall transitions, gating, venting, datums, machining stock, and inspection expectations before the shell is released.
Qualification Snapshot
Investment casting capability at a glance
Use this summary to determine whether a project belongs in engineering review. The complete corporate qualifications and technical specifications remain in the DDM Systems capability statement.
Project scope
Choose a ready-to-pour ceramic shell or a finished-casting pathway with finishing, inspection, and documentation defined for the project.
Published LAMP system specifications
24 x 24 x 24 inch build volume and a published surface-finish specification below 4 microns RMS. These are system specifications, not a finished-casting envelope or tolerance claim.
Production fit
Rapid prototyping and low-to-mid-volume production, with quantity, repeatability, qualification, and inspection reviewed against the actual component.
Alloy pathways
Air-melt and vacuum-melt alloy pathways include stainless steels, aluminum alloys, tool steels, and nickel superalloys. Review the published alloy capabilities.
Digital mold route
LAMP™ and DirectPour™ remove the conventional wax-pattern die from ceramic shell production while preserving project-specific foundry, finishing, and qualification controls.
Corporate qualifications
The capability statement lists ITAR registration, AS9100D registration, and active SAM.gov registration. Confirm program-specific requirements during review.
Build volume, surface finish, casting size, tolerances, minimum walls, alloy, downstream operations, and inspection requirements do not describe the same capability. Each is confirmed separately during engineering review.
From File to Foundry
How tooling-free investment casting works
The metal still solidifies inside a ceramic investment-casting mold. The key change is how that mold is created: the shell is generated from the approved digital geometry instead of being built around assembled wax patterns.
Share the project
Provide CAD, drawings, alloy requirements, quantities, critical dimensions, inspection needs, and timing.
Review castability
Engineering reviews geometry, wall transitions, internal features, machining interfaces, gating, and project requirements.
Design the shell
The ceramic mold, gates, vents, and applicable core geometry are prepared around the approved digital model.
Print and prepare
LAMP™ technology produces the ceramic shell directly from the digital shell design for thermal preparation and pouring.
Pour and qualify
The project proceeds as a ready-to-pour shell or through casting, finishing, inspection, and documentation defined in the scope.
Process Comparison
What changes when the shell starts digitally
| Planning area | Conventional investment casting | Tooling-free digital shell workflow |
|---|---|---|
| Mold generation | A dedicated tool produces wax patterns used to build the ceramic shell. | The ceramic shell is produced from the approved digital geometry. |
| Pattern stage | Wax patterns are injected, handled, assembled, and prepared for shell building. | Conventional wax-pattern production is removed from the shell workflow. |
| Geometry changes | A change may require modification or replacement of the pattern tool. | The shell design is revised digitally and reviewed before another build. |
| Internal features | Core strategy depends on tooling, assembly, and available molding methods. | Applicable core and shell features can be integrated into the digital mold design. |
| Project planning | Tool design, construction, pattern work, and shell building are separate planning stages. | Planning centers on digital review, shell production, pouring, finishing, and qualification. |
Casting feasibility, tolerances, surface requirements, alloy selection, inspection, and delivery timing remain project-specific. A tooling-free shell changes the mold-production route; it does not remove the need for engineering review or downstream process control.
Applications
Investment casting services for demanding component programs
The national service page connects the core casting workflow to the industry and application pages that describe more specific operating environments.
Aerospace and defense
Review the dedicated casting-manufacturer page for aerospace and defense component programs.
Space and propulsion
Explore the page for spacecraft components, rocket-engine parts, and high-performance alloy applications.
Power generation and turbines
See casting and component services for industrial gas-turbine applications.
Medical components
Review the dedicated medical casting and precision-component page.
Robotics
Explore investment casting and precision manufacturing for robotic components.
Vehicle electrification
See the page for EV powertrain and structural casting applications.
Technical Planning
Define the casting around function, evidence, and the next decision
A useful request includes more than a part file. Identify the surfaces and dimensions that control function, where machining is expected, what material and process specifications apply, which inspections are required, and what the first casting must prove. That gives the engineering review a clear decision target.
- Geometry: native CAD, drawing revision, wall transitions, internal passages, datums, and machining interfaces.
- Material: requested alloy or performance requirements that will guide alloy review.
- Quantity: initial development quantity and anticipated repeat demand.
- Quality: dimensional inspection, material documentation, nondestructive testing, and first-article requirements where applicable.
- Schedule: the date the first acceptable hardware is needed and the program event that date supports.
Frequently Asked Questions
Tooling-free investment casting questions
Does tooling-free investment casting require a wax-pattern die?
No conventional wax-pattern die is used to produce the ceramic shell. Project-specific fixtures, machining tools, gauges, or other downstream equipment may still be required.
What information should I provide for a casting review?
Provide the current CAD model and drawing, requested alloy, quantity, critical dimensions, machining expectations, inspection requirements, and target date. The review can then address geometry, shell design, process scope, and open technical questions.
Can Rapid Precision Castings provide the shell without pouring the metal?
Yes. The DirectPour™ workflow can support ready-to-pour ceramic shells for foundry customers and supply-chain partners, as well as projects that continue through metal casting and defined downstream operations.
Which casting alloys are available?
Available options depend on the application and project requirements. Review the casting-grade alloys page, then identify the requested specification in the project submission.
What tolerances can the process hold?
Tolerance capability depends on alloy, geometry, section thickness, feature location, downstream machining, and inspection method. Critical dimensions should be identified in the drawing and confirmed during engineering review.
Can the process support both prototypes and production parts?
The service is presented for development and production programs. The appropriate production route, qualification plan, repeatability controls, and inspection scope are defined for the specific component and volume.
How quickly can a project move from CAD to casting?
Timing depends on design readiness, alloy, shell complexity, foundry scheduling, finishing, inspection, and documentation. Removing conventional wax-pattern tooling changes one major part of the schedule, but the delivery plan should be established from the complete project scope.
Start with the part, requirements, and decision date
Share your CAD, drawing, alloy, quantity, inspection needs, and schedule for a project-specific casting review.
Technical Evidence and Primary Sources
These records support the technology and research statements on this page. Government project records describe scope, participants and targets; they do not by themselves establish completion of every target.
Digital investment-casting prototyping
Prototype-to-production decision path
Tooling-free shell production can shorten the mold-development path, but the critical path still depends on technical data, alloy, foundry capacity, inspection, qualification, and customer approvals.
| Decision stage | Minimum useful input | Engineering output | Schedule variable to resolve |
|---|---|---|---|
| Concept and castability screen | CAD or drawing, alloy family, quantity range, and intended function | Initial fit, data gaps, geometry risks, and recommended next review | Geometry maturity and availability of controlling technical data |
| Prototype scope | Approved geometry, target alloy, test purpose, required quantity, and delivery condition | Ready-to-pour shell versus coordinated finished-casting scope | Alloy route, foundry availability, downstream operations, and material lead time |
| First-article and qualification planning | Critical characteristics, NDT, material testing, documentation, source approval, and customer hold points | Inspection, qualification, responsibility, and acceptance plan | Approval timing, first-article requirements, special processes, and test completion |
| Repeat and production planning | Forecast quantity, change-control rules, acceptance history, and delivery cadence | Repeatable manufacturing route, capacity basis, and production controls | Yield, qualified-source capacity, inspection throughput, and customer release cadence |