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| Categories | Vacuum Casting |
|---|---|
| Part Type: | Complex Structural Plastic Component |
| Model Number: | Vacuum Casting |
| Application: | Industrial Equipment |
| Material: | Nylon-Like Polyurethane (PU) |
| Development Purpose: | Engineering Evaluation |
| Place of Origin: | China |
| Key Geometry: | Deep Openings, Ribs & Multi-Directional Features |
| Brand Name: | YS Precision |
| Destination: | Europe |
| Certification: | ISO9001 |
| Quantity: | Approx. 20 pcs |
| Process: | Vacuum Casting / Urethane Casting |
| Company Info. |
| YS COMPANY LIMITED |
| Verified Supplier |
| View Contact Details |
| Product List |
Some industrial plastic parts are difficult to manufacture not
because of their overall size, but because many functional features are concentrated into one compact
component.
This project involved a custom industrial equipment part with
several cylindrical interfaces, deep openings, reinforcing ribs,
side-facing features, mounting areas, and significant differences
in feature height.
The customer required approximately 20 parts for engineering evaluation in Europe.
If every component were produced through CNC machining, the same
multi-side machining strategy would need to be repeated across the
complete batch. For this geometry, that meant more setups, more
repositioning, and more tool-access challenges.
We therefore selected vacuum casting using a nylon-like polyurethane (PU) resin.
The complex geometry was first established in the master pattern,
transferred into silicone tooling, and then reproduced as a
low-volume batch.
| Item | Project Details |
| Application | Industrial Equipment |
| Part Type | Complex Structural Plastic Component |
| Quantity | Approx. 20 pcs |
| Process | Vacuum Casting / Urethane Casting |
| Material | Nylon-Like Polyurethane (PU) |
| Key Geometry | Deep Openings, Ribs & Multi-Directional Features |
| Development Purpose | Engineering Evaluation |
| Destination | Europe |
This component contains several functional zones that cannot all be
reached efficiently from one machining direction.
A tall cylindrical feature rises from the center of the part.
Several lower openings are positioned around the base, while other
features extend sideways or are partially surrounded by ribs.
This creates three practical CNC challenges.
Different features require access from different directions.
Machining the base does not automatically provide access to the
side-facing structures or deeper cylindrical areas. The workpiece
may therefore need to be repositioned several times.
The difference between the upper cylindrical feature and lower
structural areas affects tool reach and machining strategy.
Longer tools may be required for some regions, while surrounding
geometry can restrict the cutting path.
Ribs, deep openings, and adjacent structures can make certain
surfaces difficult to reach without additional orientations or
special tooling.
For one part, this is a machining problem.
For 20 identical parts, it becomes a repeated manufacturing-cost problem.
When sourcing a low-volume plastic part, customers often compare
unit prices.
For complex geometry, that is only part of the picture.
A multi-axis machining route can involve:
If the component needs several setups, those operations are
repeated for every piece.
For this project, that repeatability of machining complexity was
one of the main reasons to consider a different manufacturing
route.
Vacuum casting changes the manufacturing strategy.
Instead of machining the full complex geometry repeatedly, the
effort is concentrated into one qualified master pattern.
The route becomes:
Complex Master Pattern
→ Silicone Tooling
→ Nylon-Like PU Casting
→ Repeated Components
Once the silicone mold captures the geometry, subsequent parts can
reproduce the same cylindrical features, ribs, recessed areas, and
height transitions without repeating the complete multi-direction
CNC sequence.
This is where urethane casting can become useful for low-volume complex plastic parts.
The key benefit is not simply lower tooling cost.
It is the ability to shift repeated geometry from machining into temporary replication
tooling.
Silicone molds provide flexibility that rigid tooling does not.
For suitable parts, this can help reproduce certain local
undercuts, projections, and multi-directional features while
keeping the component as one integrated structure.
For this industrial part, mold planning needed to consider:
The mold split and release strategy therefore remained an important
DFM consideration.
Vacuum casting may reduce repeated CNC operations, but it still
requires thoughtful mold design to reproduce complex geometry
consistently.
The customer required material behavior similar to nylon for the
engineering evaluation parts.
A nylon-like polyurethane casting resin was selected to provide a practical balance of:
This material was suitable for the customer's current evaluation
stage and allowed the complex geometry to be reproduced through
silicone tooling.
Nylon-like PU is not the same as production PA6 or PA66.
If later testing depends on specific nylon properties such as wear
resistance, elevated-temperature performance, chemical resistance,
or long-term loading, parts made from the actual specified
production material may be required.
The quantity alone did not determine the process.
Twenty simple plastic blocks might still be ideal for CNC
machining.
This project was different because the 20 components combined:
Multiple Machining Directions
That combination made repeated CNC machining less efficient.
Vacuum casting provided a practical manufacturing window between
one-off machining and production tooling.
For the customer, the savings came from reducing repeated setup and
machining work across the complete batch.
The approximately 20 components were required for the customer's
product development work in Europe.
The purpose was to obtain physical parts that could be used for:
At this stage, the customer needed more than one demonstration
model, but the project did not yet require production tooling.
This is where low-volume urethane casting can provide value for
industrial equipment development.
This project demonstrates an important manufacturing principle:
The best process is determined by the geometry that must be
repeated—not only by the quantity.
CNC machining remains the better choice when actual engineering
material, tighter tolerances, or specific mechanical properties are
required.
Vacuum casting becomes attractive when a low-volume component
combines complex geometry, repeated setups, suitable tolerances,
and acceptable simulated material properties.
For this project, those conditions aligned.
YS Precision supports vacuum casting and urethane casting for complex industrial equipment components and low-volume plastic parts, including parts with:
Send us your 3D CAD files, quantity, intended production material, critical
dimensions, and testing requirements.
We can review the geometry and determine whether vacuum casting,
CNC machining, or another low-volume manufacturing process provides
the most appropriate route.
For complex parts, process selection should focus on how the
geometry will be manufactured repeatedly—not simply how one
prototype can be made.
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