Rapid Prototyping with Yijin Solution

Pick by what the prototype needs to prove. CNC machining is the choice when the prototype must behave like the production part under load, fit, or tolerance test. Sheet metal fabrication fits any part the production version will be cut, bent, or welded from flat stock. 3D printing is best when geometry is too complex to machine, or when iteration speed matters more than final material properties. Injection molding is the right call when you need to validate gating, shrink, or wall-flow behavior before cutting hard production tooling.

If you are not sure which one fits, send the CAD file across. Our engineering team picks the route based on the part geometry, the material requirement, and whether the prototype is for visual review, functional testing, or production validation.

Most prototypes ship within 3 to 7 business days from quote approval. 3D printed parts in standard materials can ship in 1 to 3 days. CNC machined and sheet metal prototypes ship in 3 to 7 days. Injection molded prototypes take 2 to 4 weeks because the timeline includes cutting aluminum prototype tooling before parts can run.

Quotes themselves come back within 24 hours of CAD file upload. Express options are available for time-critical work, with shipping tracking provided on every order.

Across the four processes we cover most production-grade engineering materials.

CNC machining runs aluminum (6061, 7075, 2024), stainless steel (303, 304, 316, 17-4 PH), tool and carbon steel, titanium (Grade 2, Ti-6Al-4V), brass, copper, nickel superalloys, and engineering plastics like POM, PA, PC, PEEK, and PMMA. Sheet metal fabrication covers aluminum, stainless, mild steel, brass, and copper from 0.5 to 12 mm thick. 3D printing supports PLA, ABS, PA, photopolymer resins, and metal alloys including stainless. Injection molding runs PA, PC, ABS, PP, POM, and TPU.

Every order ships with mill certificates and heat-lot traceability.

Tolerance varies by process. CNC machining holds ±0.05 mm as standard, with ±0.02 mm achievable on 5-axis programs and Swiss-type lathe work. Sheet metal fabrication holds ±0.1 mm on cuts and ±0.5° on bend angles. 3D printed parts hold ±0.1 mm to ±0.3 mm depending on the technology and material. Injection molded prototypes match production tolerances for the chosen resin, typically ±0.05 to ±0.1 mm.

We provide First Article Inspection reports on request. Critical batches are verified using Zeiss CMMs, laser interferometers, and optical comparators.

Rapid prototyping covers the small-batch parts you need to validate a design. Quantities range from a single piece to a few hundred. The focus is on speed of iteration and proving the part will work.

Rapid manufacturing is the production version of the same part, run in larger quantities once the design is locked. At Yijin Solution both happen on the same shop floor with the same engineering team, so the prototype and the production part come off the same machines with the same programming. There is no re-qualification step when you scale.

Yes. Your prototype is built on the same CNC centers, press brakes, stamping lines, or molding presses we use for production runs. The programming, tooling, and inspection routines carry forward when you move to volume.

That continuity removes the most common scale-up risks: process variation between vendors, re-qualification cycles, and supply chain handoffs. Customers typically stay with us from the first prototype through to production volumes ranging from hundreds to over a million parts per year.

We accept STEP (.step, .stp) y STL (.stl) files for 3D models. Please include critical dimensions, tolerances, and surface finish requirements where applicable.

Upload your file through the contact form or email it to us. Our engineering team will review your design and provide a DFM assessment and quote within 24 hours, including pricing, lead time, and recommendations to optimize cost and manufacturability.

No. We run single-piece prototypes through the same machining centers as production batches of 100,000 or more parts. The same QC standards apply at every quantity.

For low-volume bridge runs between prototype and full production, we typically run 50 to 10,000 parts on aluminum prototype tooling for injection molding, or unlimited counts on CNC and sheet metal lines.