Complex Geometry
倒扣, internal channels and interconnected features can be produced without support attachment points. Enclosed cavities still need access for powder removal.
中国精密工具公司
翻译
» Selective Laser Sintering（SLS）
3D printing / SLS
Selective Laser
Selective Laser
Sintering (SLS)
Functional Nylon Parts for Complex Designs
From functional prototypes to low-volume polymer components, without production tooling.
Why Choose SLS?
SLS fuses polymer powder layer by layer. Surrounding powder supports the build, so suitable complex shapes can be produced without conventional printed supports.
GPT Precision reviews your CAD models, 材料要求, quantities and critical features to assess the manufacturing approach.
Functional Evaluation
Assess fit, assembly behavior and selected mechanical requirements using engineering polymers. Suitability depends on the material grade, geometry, loading and environment.
Flexible Quantities
Avoid injection mold tooling for design revisions, prototypes and selected low-volume parts. Evaluate the economics against part size, finishing and repeat demand.
Efficient Batch Builds
Parts can be packed in three dimensions to share build preparation and processing. Unit cost also depends on build height, 材料, cooling, powder recovery and inspection.
Typical SLS Parts & Applications
Start with what the component needs to do, then identify the features that control performance.
Housings & Protective Covers
Equipment enclosures with integrated mounts and internal clearances.
Review: Wall sections, fastening features and mating interfaces.
Ducts & Airflow Components
Complex routing and internal passages in a single polymer component.
Review: Cleaning access, internal surfaces and leakage requirements.
Clips & Brackets
Snap-fit features, mounting brackets and assembly components.
Review: Deflection, load direction, fit and repeated use.
Lightweight & Robotic Parts
Frames, sensor mounts and equipment attachments.
Review: Load paths, vibration, weight and operating conditions.
Fixtures & Replacement Parts
Assembly aids, positioning tools and selected low-volume end-use components.
Review: Contact surfaces, wear, repeatability and acceptance criteria.
Choose Materials Around the Function
PA12 and PA11 are common starting points for SLS. Compare the actual grade data with the stiffness, flexibility and environment your part requires.
PA12 — Balanced Performance
A balance of stiffness, toughness and dimensional stability for housings, brackets and general-purpose functional parts.
Review: Sustained loading, operating temperature, environmental exposure and critical fits.
PA11 — Greater Ductility
Often considered for flexible clips, snap-fits and impact-loaded parts requiring greater elongation than typical PA12 grades.
Review: Required stiffness, deflection, repeated flexing and fatigue data.
All grades and availability, including PA12 and PA11, require confirmation. Use manufacturer datasheets and agreed testing to assess suitability.
Design for SLS
Plan for printing, cooling and powder removal together. Review these five risks before committing to the finished geometry.
Powder Removal
Closed cavities trap unfused powder. Provide accessible cleaning routes; opening size, number and location depend on the cavity and cleaning method.
Thin Features
Slender walls, pins and edges may distort or break during cleaning. Assess material, 方向, feature length and loading rather than using one universal minimum thickness.
Section Transitions
Abrupt thickness changes can produce uneven cooling and warping. Review gradual transitions, large flat surfaces and long features.
Fits & Clearances
Allow for material behavior, 方向, dimensional variation and finishing. Validate critical moving interfaces and snap-fits with samples before repeat production.
Small Holes & Channels
Partial fusion and retained powder can restrict fine passages. Confirm manufacturability, cleaning access and a practical inspection method.
表面处理 & Post-Processing
SLS starts with a matte, granular surface. Choose a finish around the visible faces, contact surfaces and dimensions that must remain controlled.
Depowdered
- Result
- Matte, fine-grained texture.
- Consider for
- Engineering evaluations where cosmetics are secondary.
- Review
- Accessible powder is removed; the surface is not equivalent to polished or molded plastic.
Mechanical Smoothing
- Result
- Reduced roughness and a more uniform feel.
- Consider for
- Handling and appearance requirements.
- Review
- Tumbling can round edges and alter small features or precision interfaces.
Dyeing
- Result
- Color on compatible polymer parts.
- Consider for
- Visual identification or appearance.
- Review
- Color uniformity and penetration vary with material, geometry and surface condition.
Vapor Smoothing
- Result
- A smoother surface on compatible materials.
- Consider for
- Surface feel and cleanability requirements.
- Review
- Fine details and dimensions can change. Do not assume leak-tightness without validation.
Confirm process availability, material compatibility and acceptance criteria before selecting a finish.
SLS Compared with Other Manufacturing Processes
Different processes solve different manufacturing problems. Select the process based on the finished component's requirements.
Swipe horizontally to compare all columns.
| Process | Best considered when | Main trade-off |
|---|---|---|
| SLS | Functional polymer parts, complex geometry and low-volume batches | Granular as-printed surfaces, powder-removal and dimensional constraints |
| SLA | Fine visual detail and smooth presentation surfaces | Resin properties may not represent the intended production material |
| MJF | Powder-bed polymer parts, batch production and functional applications | Material and process availability, finish and dimensional behavior vary |
| 数控加工 | Defined stock material properties, precise interfaces and machined surfaces | Access limitations, material removal and machining setup |
Considering injection molding? Repeat demand may justify tooling, while design changes add cost. Compare total project cost, material requirements and inspection needs.
Selected SLS parts may benefit from secondary machining, inserts or assembly operations; confirm the scope during review.
From CAD to Finished Parts
Review
Assess the model, drawings, intended function and critical features.
Plan
Confirm material, 数量, 方向, build packing and finishing requirements.
Produce
Print, cool the build and remove accessible unfused powder.
Verify
Complete agreed finishing and inspection against acceptance criteria before delivery.
质量 & Dimensional Control
Define the Critical Features Before Production.
SLS dimensional results depend on geometry, size, 方向, material and processing conditions.
Rather than applying one tolerance value to every feature, identify the dimensions that control assembly, movement or function.
What Should Be Defined?
- Critical mounting holes and locating features
- Mating surfaces and assembly clearances
- Internal passages requiring powder removal
- Wall thickness and structural features
- Surface finish and cosmetic requirements
- Material grade and required documentation
Inspection Based on Part Requirements
Dimensional checks, fit evaluations and other inspection methods can be planned around agreed drawing requirements.
Where tighter control is needed, consider sample validation, design allowances or secondary machining.
Build size, layer thickness and achievable tolerances will be confirmed against the selected manufacturing equipment and project requirements.
常见问题解答
Does SLS require support structures?
Conventional printed supports are normally unnecessary because surrounding powder supports the part. Cleaning access and fragile features still need design review.
Can SLS parts be used in service?
Selected applications may be suitable after material and design review. Load-bearing, fatigue-sensitive, safety-critical or environmentally exposed parts may need additional validation.
Can I specify a smoother finish?
是的, as a requirement for review. Available methods depend on material and geometry; agree on appearance and dimensional acceptance criteria before production.
Can internal channels be cleaned?
Only where geometry and access allow adequate powder removal. Deep or narrow passages need particular review, including how cleanliness will be checked.
Is one part or a batch more economical?
SLS can accommodate individual prototypes and batch builds. 几何形状, 材料, finishing and tooling alternatives determine the economics; more parts do not guarantee a lower unit price.
What determines quotation timing?
Timing follows the initial review of complexity, 材料, quantity and engineering requirements. Send the model, 图纸, application and finished-condition requirements together to reduce clarification rounds.
Request Your SLS Quote
Share your CAD files and what the part needs to do. GPT Precision will review the requirements and discuss a suitable manufacturing approach.
Include with Your Inquiry
- 3D model and applicable engineering drawings
- Quantity and expected repeat batches
- Material preference or mechanical requirements
- Critical fits, loads and operating environment
- 表面处理, inspection and documentation requirements
服务
