Rapid prototype housings made by CNC machining, 3D printing and vacuum casting, including a machined aluminum impeller

SERVICE 01

Rapid Prototyping & Low Volume Production

Rapid Prototyping Parts and Low-Volume Production Services

Kewei produces rapid prototype parts for design evaluation, functional testing and low-volume production using CNC machining, 3D printing and vacuum casting. Our engineering team helps customers select the right process, material and finish for each development stage.

CNC Machining
3D Printing
Vacuum Casting

Prototype PartsLow Volume ProductionFunctional Models

Explore Rapid Prototyping

Rapid Prototyping

CNC Machining

Injection Molding

Surface Finishing

Engineering & Flexible Volumes

Detailed Quality Inspection

Global Delivery & NDA Support

Kewei in Numbers

Manufacturing Capability You Can Rely On

Proven project experience, flexible production support and practical engineering communication for global customers.

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5000+

Projects Delivered

Prototype and production projects completed

30+

Engineering Materials

Metals, plastics and elastomers

20+

Manufacturing Processes

From prototyping to production

24H

Engineer-Reviewed Quotation

Submit complete drawings and project requirements for quotation review.

1 Piece

Prototype Starting Quantity

Flexible support for development projects

Global

Shipping Support

Worldwide delivery coordination

Manufacturing services

A broad manufacturing range for technical buyers.

Each process is supported with engineering review, material and finish planning, and practical quotation feedback.

Rapid prototype engineering plastic housings and functional parts

Service 01

Rapid Prototyping

Prototype parts for concept reviews, fit checks and functional validation before production commitment.

Materials: Resin, nylon, PU, aluminum

Parts: Concept models & test fixtures

Focus: Fast iteration & low-volume runs

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Precision CNC machined aluminum, stainless steel and anodized components

Service 02

CNC Machining

Multi-axis milling and turning for precision parts with controlled datums, threads and critical interfaces.

Materials: Aluminum, stainless, brass

Parts: Housings, brackets & shafts

Focus: 5-axis, milling & turning

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Custom injection molded plastic housings, frames, covers and functional parts

Service 03

Injection Molding

Repeatable plastic parts from DFM and mold trials through approved production runs.

Materials: ABS, PC, PA & POM

Parts: Housings, covers & clips

Focus: DFM, sampling & repeat runs

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Open multi-cavity injection mold with machined cavities, guide pillars and locating bushings

Service 04

Injection Mold Tooling

Injection tooling planned around gating, ejection, parting lines and reliable mold trials.

Materials: P20, H13, 718H steel

Parts: Cores, cavities & inserts

Focus: Mold DFM & trial support

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Service 05

Die Casting

Aluminum and zinc castings with post-machining for robust housings, frames and heat-dissipation parts.

Materials: ADC12, A380 & zinc alloy

Parts: Motor, heat-sink & enclosure bodies

Focus: Casting plus CNC finishing

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Industrial SLS, MJF and resin 3D printed functional prototype components

Service 06

3D Printing

Additive prototypes for fit, function and visual review in fine-detail resin, nylon or metal.

Materials: SLA resin, SLS / MJF nylon

Parts: Functional & appearance models

Focus: Fast validation cycles

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Service 07

Vacuum Casting

Low-volume urethane castings for production-like housings, clear covers and appearance evaluations.

Materials: Rigid, clear & rubber-like PU

Parts: Small-batch housings & covers

Focus: Pre-tooling bridge builds

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Structured-light scan of a cast housing compared with reconstructed CAD geometry

Service 08

Reverse Engineering

Physical samples rebuilt into usable CAD, drawings and manufacturing-ready geometry.

Materials: Samples, scan data & CAD

Parts: Legacy & replacement parts

Focus: Scan, rebuild & compare

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Process: 3D Printing

Material: SLA Resin

Application: Product Development

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Why Kewei

Manufacturing support built around clear decisions.

One manufacturing partner from early prototypes to repeat production.

Engineering Review Before Production

Drawings, materials, critical features and manufacturing risks are reviewed before machining or tooling begins.

Flexible Production Volumes

Support for one-piece prototypes, functional testing, pilot runs and repeat production orders.

Quality and Project Visibility

Key requirements, production checkpoints and inspection priorities remain visible from quotation through shipment.

International Communication and Delivery

File-based project communication, export packing coordination and global shipping support for overseas engineering and sourcing teams.

Materials & Surface Finishes

Materials and Surface Finishes Selected Around Part Requirements

Choose from engineering metals, plastics and elastomers, with Surface Finishes selected around function, appearance and manufacturing process.

30+ Engineering Materials

Multiple Surface Finishes for functional and appearance requirements.

View Materials View Surface Finishes

Representative metal, plated and finished components alongside a clear engineering plastic enclosure

Material categories

Compare material families before choosing an exact grade.

Metals

Structural, thermal and corrosion-conscious material choices for machined and fabricated parts.

Aluminum
Stainless Steel
Titanium
Brass
Copper

Engineering Plastics

Material options for housings, mechanisms, electrical insulation and controlled wear interfaces.

ABS
POM
Nylon
PEEK

Elastomers

Flexible material choices for grip, sealing, protection and controlled movement.

Surface Finishes

Surface Finishes selected for function, protection and appearance.

Anodizing

An electrochemical aluminum finish used to support corrosion resistance, wear performance, and controlled appearance.

Bead Blasting

A media-blasting treatment used to create a controlled matte texture and prepare visible metal surfaces.

Polishing

Mechanical surface refinement used to reduce roughness and create smooth satin or reflective metal surfaces.

Powder Coating

A durable dry coating commonly used for sheet metal enclosures, brackets, frames, and cast housings.

Painting

A liquid coating option for controlled color, gloss, texture, and appearance on metal or selected plastic parts.

Need guidance on materials and Surface Finishes?

Share the application, functional requirements, service environment and appearance expectations. Our engineers can suggest suitable material options and Surface Finishes for review.

Request Material Guidance

Coordinate measuring machine inspecting a precision aluminum component

Quality assurance

Inspection Planning Starts with the Drawing

Quality requirements are reviewed around the drawing, material, finish, critical features and intended application before production begins.

View Quality Approach

QC 01

Drawing & Requirement Review

Drawings, tolerances, cosmetic surfaces, assembly interfaces and critical features are reviewed before the manufacturing route is confirmed.

QC 02

Material & Finish Confirmation

Material grades, finishing requirements, colors and visible surfaces are confirmed against the approved project requirements before production.

QC 03

In-Process Inspection Planning

Inspection priorities are planned around drawing risk, critical dimensions, datums and functional interfaces.

QC 04

Final Appearance & Release Check

Visible surfaces, agreed dimensions, quantity, configuration and packing requirements are reviewed before shipment release.

How we work

From Your Drawings to Production and Delivery

A structured manufacturing workflow keeps project requirements, engineering decisions, production checkpoints and shipment preparation clear at every stage.

Step 01

Upload Files & Project Requirements

Share your drawings, 3D data, material, quantity, finish, tolerance and delivery requirements for an initial project review.

NDA review can be arranged before detailed confidential files are shared.

STEP / STPIGES / IGSX_T + PDF drawings

Step 02

Engineering Review & DFM

The proposed process, material, critical features and manufacturing risks are reviewed before quotation and production planning.

Drawing reviewProcess recommendationCritical features

Step 03

Quotation & Schedule Confirmation

Pricing, manufacturing route, quantity, finishing requirements and the proposed schedule are confirmed before the project moves forward.

Quotations are engineer-reviewed rather than generated through instant automatic pricing.

Engineer-reviewedRoute confirmationSchedule review

A multi-axis machining operation producing a metal component

Dimensional inspection of a manufactured component

Step 04

Production & Quality Checkpoints

Production follows the confirmed drawing and project requirements, with updates and inspection priorities focused on critical manufacturing stages.

Production updatesInspection prioritiesRequirement traceability

Finished precision components checked and arranged in protective packing before shipment

Step 05

Final Inspection, Packing & Global Delivery

Agreed dimensions, appearance, quantity and packing requirements are reviewed before shipment, followed by delivery coordination for the project destination.

Final inspectionPacking requirementsGlobal shipping

Confirmed project requirements can support clearer communication for repeat orders and future revisions.

Featured case studies

Process:: Injection Molding
Engineering focus:: Wall thickness, draft, parting line and appearance surfaces

From DFM and mold planning through trial samples, appearance checks and production preparation.

View Project Route

Optical lens holder

Stable housings and alignment features for optical equipment, cameras and sensing systems.

View Industry

FAQ

Common questions before you send drawings.

Do you provide instant automatic pricing?

No. Quotations are reviewed based on the drawing, material, quantity, finish, tolerance and project requirements.

Which files can I upload?

Common formats include STEP, STP, STL, IGES, IGS, X_T and PDF drawings. Supporting images and compressed project packages can also be included.

Can Kewei review an NDA before I share drawings?

NDA review can be arranged before detailed confidential files and project information are shared.

Can you support prototypes and repeat orders?

Yes. Kewei supports prototypes from one piece, functional testing, pilot quantities and repeat production requirements.

What information is needed for a quotation?

Provide available drawings or 3D files together with material, quantity, finish, tolerance, delivery destination and any critical functional or appearance requirements.

Which certifications does Kewei hold?

Certification and documentation requirements should be confirmed with the Kewei team for your specific project before ordering.

Start your project

Ready to Start Your Next Manufacturing Project?

Submit complete drawings and project requirements for quotation review.

Engineer-Reviewed Quotation

Quotations are reviewed against your files, material, quantity, finish and critical project requirements.

Supported Project Files

Upload available 3D data, 2D drawings and supporting project information.

Confidential Project Support

NDA review can be arranged before detailed confidential files are shared.

RFQ Intake

Upload drawings for engineering review

Provide the controlled files and project requirements for an engineer-reviewed quotation. This is not instant automatic pricing.

NameCompanyBusiness emailPhone / WhatsApp (optional)CountryManufacturing processMaterialQuantitySurface finishToleranceDelivery requirementProject description File uploadAccepted CAD, drawing and archive files: STEP, STP, STL, IGES, IGS, X_T, SLDPRT, OBJ, DXF, DWG, PDF, JPG, PNG, ZIP, RAR. Maximum file size: 25 MB.No file selected

NDA required. Arrange confidentiality review before Kewei receives detailed confidential files.I agree that Kewei may use my contact and project information to review this enquiry, according to the Privacy Policy.

Uploaded files are stored privately for engineering review.