Validate the niche
Pick one lead process, build a 3-5 factory supplier pool, and target 5-10 qualified RFQs per month.
Custom Plastic & Metal Parts, Managed From Prototype to Production
We help overseas buyers source and manage custom plastic and metal parts through vetted Chinese manufacturing partners, with DFM feedback, fast RFQs, and practical quality control.
Drawing review
Supplier matching
Two-option quotation
Pre-shipment check
Built for buyers who need more than a low unit price
The first six months should prove a focused service model: fast communication, controllable suppliers, and quote decisions that protect both cost and production risk.
Close the loop
Turn real jobs into case studies, quote consistently, and push samples into small-batch orders.
Scale what repeats
Double down on the part families that convert, then add SEO content and small paid tests.
SOHO launch roadmap
The first year should be managed like a focused sales experiment: prove one niche, document the work, then scale the part families that keep converting.
Validate one lead process
Choose one primary lane such as injection molded enclosures, low-volume CNC aluminum parts, or sheet metal covers. Build a supplier shortlist, company email, case materials, quote templates, and outreach lists.
Target: 80-150 researched prospects, 5-10 qualified RFQs, 1 paid sample or small order.Build the repeatable close loop
Convert real inquiries into anonymized case pages, tighten quotation rules, and measure supplier response speed, RFQ quality, and sample conversion instead of only watching website traffic.
Target: 10-20 qualified RFQs per month, 2-4 sample projects, 1-2 paid orders.Scale the niche that pays
Add SEO pages, small paid tests, LinkedIn content, and deeper supplier agreements around the parts that produce good margins and fewer quality surprises.
Target: 20+ monthly RFQs, 2-5 monthly orders, 15-25% practical gross margin.Manufacturing capabilities
Use this site as a trust base for active outreach. The first version should show what can be quoted, sampled, checked, and shipped without pretending to be a large factory.
Injection molding
Plastic housings, clips, covers, gaskets, threaded parts, and production tooling review.
CNC machining
Prototype and low-volume aluminum, stainless steel, brass, POM, and fixture parts.
Sheet metal and stamping
Brackets, covers, panels, and repeatable formed parts with surface treatment options.
Assembly and finishing
Silk printing, painting, anodizing, plating, inserts, packaging, and export coordination.
Supplier pool designed for control, not catalog volume
A lean SOHO operation does not need hundreds of factories. It needs a few responsive partners that can quote honestly, accept engineering feedback, and support samples before mass production.
Injection molding partner
Small-batch flexibility, tooling review, T1 sample adjustment, and clear material sourcing.
CNC partner
Fast prototypes, aluminum and stainless options, tapped-hole checks, and finish control.
Sheet metal backup
Bending, laser cutting, stamping, powder coating, and pilot-batch support.
Inspection resource
Dimensional reports, finish photos, packaging checks, and pre-shipment verification.
Material decisions handled with production risk in mind
Quote recommendations should explain performance, stability, finish, and supply risk rather than only listing material names.
Plastics
ABS, PC, PP, PA, POM, PMMA, TPE, silicone, recycled-content options where performance allows.
Metals
Aluminum, stainless steel, carbon steel, brass, copper, zinc alloy, and common sheet grades.
Surface finishes
Anodizing, powder coating, painting, polishing, plating, passivation, brushing, bead blasting.
Drawing inputs
STEP, STL, IGES, DXF, PDF drawings, photos, BOMs, tolerance notes, target price, and application use.
Case study formats that help buyers trust the process
Early cases can be anonymized. Each one should show the material, process, challenge, DFM decision, sample result, inspection method, and shipment outcome.
Waterproof plastic enclosure
Reviewed thread release, O-ring compression, recycled PP risk, and T1 sample route.
Discuss a similar caseLow-volume CNC aluminum bracket
Balanced prototype speed, anodizing color control, tapped-hole inspection, and export packing.
Send machining filesSheet metal equipment cover
Checked bend radius, powder-coat finish, fastener alignment, and pilot-batch acceptance.
Review a drawingPractical quality control before the shipment leaves China
The service promise is simple: confirm requirements in writing, match the job to the right supplier, inspect the parts that matter, and keep the buyer informed before risk becomes expensive.
- 01 Drawing and application review within 24 hours
- 02 Supplier quote comparison by cost, risk, and lead time
- 03 Paid sample, prototype, or T1 sample confirmation
- 04 Dimensional, finish, packaging, and pre-shipment checks
Send an RFQ that can be quoted properly
Share the process, material, quantity, drawing status, and the business goal. A practical first reply should confirm risks and missing information before quoting.
- Target: reply within 24 hours
- Quote: economy option plus stable-production option
- First order: paid sample or small batch before scale-up
A lean sourcing partner, not a faceless trading catalog
Best-fit projects are drawing-driven custom parts, low-to-mid volume production, and orders where communication speed, DFM judgment, supplier control, and inspection matter more than chasing the absolute lowest quote.
Recommended next setup
Connect this site to your domain, Google Search Console, GA4, company email, WhatsApp, and CRM sheet.
contact@proteform.com