ISO 9001:2015 Certified by SGS
Certified Quality Management SystemPump Replacement Case Study · Large Aluminium Bronze Impeller
A replacement impeller was required for a vertical pump that had remained in service for more than 20 years. With no original pattern available, the damaged impeller became the engineering reference for reconstructing and manufacturing one C95500 aluminium bronze replacement.
The Replacement Challenge
The pump had been operating for more than 20 years. Its removed impeller showed cracking and cavitation/corrosion damage, and the original pattern and tooling were not available.
Only one replacement impeller was required. The new component therefore had to be reconstructed from the damaged physical reference while preserving the relationships needed for the existing pump assembly.
The project required casting and machining to be completed within a four-week project window.
Manufacturing Decision
With no original pattern available and only one replacement impeller required, the project followed a patternless manufacturing route. The damaged component was used as the engineering reference, reconstructed in CAD, and converted into a 3D-printed sand mould for casting.
Reverse engineering was not a simple scan-and-copy exercise. Damaged geometry had to be interpreted during CAD reconstruction.
Engineering-to-Manufacturing Workflow
Total project window: four weeks through completed machining.
Review the removed impeller and identify usable reference geometry, wear, cracking and cavitation/corrosion damage.
Record principal dimensions and the interfaces needed for reconstruction.
Capture the complex physical geometry of the damaged reference component.
Rebuild the component as manufacturable engineering geometry rather than copying the damaged condition directly.
Prepare the reconstructed geometry for mould production and casting.
Produce the one-off sand mould directly from the prepared digital data without an original pattern.
Cast the replacement impeller in ASTM B148 C95500 aluminium bronze.
Complete the required machining of the replacement component.
Perform the checks and balancing included in the original project.
Project Evidence Gallery
The available published project figures show the one-off sand mould during preparation and the finished impeller after machining.
Detailed historical inspection records from this earlier project are not presented on this page.
Published Technical Evidence
This vertical-pump impeller project is included in Speed 3D Mold’s published documentation on using 3D sand printing for replacement-part production.
Using 3D Sand Printing Technology in Part Replacement · Metal Casting Technologies, 2017
Read the Published DocumentationEngineering Boundary
Every replacement project is reviewed individually. Geometry, alloy, inspection requirements, machining scope and lead time depend on the condition of the reference component, the available engineering information and the operating requirements. The four-week project window is a documented result from this case, not a standard lead-time promise for every future project.
It can be possible when enough usable geometry and interface information remain on the component. The physical part can become the starting point for reverse engineering and CAD reconstruction.
Yes, subject to engineering review. Damage and wear mean the measured condition cannot simply be copied; usable reference geometry must be separated from areas requiring reconstruction.
They are interpreted using the remaining geometry, measurable relationships, available engineering information and the interfaces that must be retained. Feasibility depends on the condition and completeness of the reference.
Only one impeller was required and no original pattern was available. The approved digital geometry could therefore be used to produce a one-off sand mould without recreating conventional pattern tooling. The metal impeller itself was cast in the printed sand mould.
No. Four weeks through completed machining is the documented window for this case. Future timing depends on geometry, alloy, reference condition, quantity, machining and inspection scope.
Send available photographs, principal dimensions, drawings or CAD data, material information, required quantity and the requested machining or inspection scope for an initial engineering review.
Technology Representation
Speed 3D Mold Co., Ltd. is listed by ExOne as a sales representative in Thailand, supporting local coordination for industrial sand 3D-printing solutions.
Verify our listing on ExOne’s official global support network.
View Official ExOne Listing
