Casting Service from a China Manufacturer & Supplier

Need complex metal parts without high machining cost? YiguProto is a China factory and supplier for investment casting, sand casting, and die casting. Send your drawing and get a quote in 24 hours.

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Casting parts made at YiguProto China manufacturer
Molten metal becomes a finished casting at our China factory

The problem

Your metal part is hard to machine or too expensive to tool

Many buyers come to us with the same issue. The shape is complex. The wall is thin. The volume is not high enough for injection molding. CNC machining wastes material and money.

Other suppliers are slow. Quotes are vague. Nobody explains the best process. Files get passed around with no confidentiality.

  • “I need metal parts, but I am not sure which casting method fits.”
  • “My supplier quoted CNC because they do not run a foundry.”
  • “I want factory price, not reseller markup.”
  • “I need samples before mass production.”

That is where a real casting manufacturer helps.

Our solution

One China casting company for prototype to production

YiguProto is a custom manufacturing company and supplier based in China. We help global buyers turn drawings into cast metal parts. We support prototypes, bridge runs, and production orders.

Why buyers choose our casting service

  • Factory-direct pricing: you talk to a manufacturer, not a trading middleman.
  • Process advice: we tell you when sand, investment, or die casting is cheaper.
  • DFM review: engineers check wall thickness, draft, shrinkage, and gates.
  • Material help: aluminum, steel, stainless steel, bronze, brass, iron, zinc.
  • One stop: casting + CNC machining + surface finish + inspection.
  • Export experience: packaging, documents, and global shipping handled.

What you get after the quote

  1. Clear price breakdown.
  2. Recommended casting process.
  3. Tolerance and material confirmation.
  4. Sample or batch plan.
  5. Production photos and inspection report.
  6. Tracked delivery to your door.
Upload Drawing for Quote

Casting methods

Investment casting, sand casting, die casting — explained simply

Not sure which one you need? That is normal. Below is the plain-English version.

Method Simple meaning Best for Typical parts
Investment casting
(lost-wax)		 Molten metal fills a ceramic mold made from a wax pattern. Complex shapes, smooth surface, tight tolerance. Valve bodies, pump parts, impellers, brackets.
Sand casting Molten metal is poured into a sand mold. Larger parts, lower tooling cost, medium/large size. Housings, frames, machine bases, covers.
Die casting Molten metal is forced into a reusable steel mold. High volume, thin walls, repeatable metal parts. Aluminum enclosures, zinc fittings, auto parts.

Still unsure? Send the drawing. Our engineers will recommend the right process for cost, strength, and lead time.

Ask an Engineer

Capabilities

Casting capabilities at a glance

Real numbers so your purchasing team can evaluate us quickly.

ItemYiguProto capability
ProcessesInvestment casting, sand casting, die casting
MaterialsAluminum, steel, stainless steel, bronze, brass, cast iron, zinc alloy
As-cast toleranceAround ±0.1 mm to ±0.5 mm, depending on process and size
Part sizeSmall precision parts to medium/large sand cast components
Volume1 piece prototype, small batch, bridge run, full production
Lead timeUsually 10–25 business days; faster options reviewed case by case
Extra workCNC machining, drilling, threading, heat treatment, anodizing, plating, painting, powder coating
QualityDimension check, material check, visual inspection, sample report

How it works

From CAD file to finished casting in 5 steps

1

Send drawing

Upload STEP, STP, IGES, STL, DWG, or PDF. Add quantity and material.

2

Get quote + DFM

We reply in hours on business days. Max 24 hours. We suggest the best process.

3

Approve sample

We can make a sample or prototype before full production.

4

Cast & machine

Molten metal is cast, then finished by CNC or surface treatment.

5

Inspect & ship

We check dimensions, pack securely, and ship worldwide with tracking.

Start My Casting Project

Why YiguProto

A China manufacturer that acts like your sourcing office

Experience

We work with global buyers in robotics, automotive, industrial equipment, electronics, medical accessories, and energy parts. We know how purchasing managers think: price, lead time, quality, and traceability.

Expertise

Our team reviews draft angles, wall thickness, shrinkage, gating, and machining allowance. We do not just say “yes” to every drawing. We help you make the part cheaper and stronger.

Authority

YiguProto is operated by Dongguan Yigu Technology Co., Ltd. We run custom manufacturing services from China and support export documentation, Incoterms, and batch records.

Trust

  • Your files stay confidential. NDA available.
  • Quotes are itemized, not vague.
  • Production photos on request.
  • Inspection reports included.
  • One accountable contact from quote to delivery.

Materials

Common casting alloys we work with

Choose from standard alloys or tell us your spec. We source material from qualified mills.

Material typeExamplesTypical use
AluminumA356, ADC12, LM6Enclosures, brackets, housings, automotive parts
SteelCarbon steel, low alloy steelHeavy frames, gears, machine parts
Stainless steel304, 316, 17-4PHValves, marine parts, food equipment
Bronze & brassPhosphor bronze, aluminum bronzeBearings, bushings, marine hardware
Cast ironGray iron, ductile ironBases, pulleys, pump housings
Zinc alloyZamak 3, Zamak 5Small die cast parts, handles, fittings

Need a special alloy? Send us your material spec or ASTM grade. We will confirm availability before quoting.

Quality

How we check every casting

Quality is not a separate step. It is built into every stage.

Before casting

  • DFM review of your drawing.
  • Material confirmation with mill certificate.
  • Tooling or pattern check.

After casting

  • Dimensional inspection with calipers, CMM, or gauges.
  • Surface finish check.
  • Visual inspection for porosity, cracks, or shrinkage.
  • Optional: X-ray, ultrasonic, or pressure test.
  • Machining verification for critical holes and threads.
Ask About Our QC Process

Who uses our casting service

Industries we support

Industrial equipment

Frames, housings, covers, and brackets that must survive vibration and load.

Automotive

Brackets, mounts, housings, and small structural parts for prototypes and production.

Robotics

Lightweight aluminum parts with complex internal channels and thin walls.

Medical

Small precision components for devices and equipment. NDA available.

Energy & marine

Valve bodies, pump parts, and corrosion-resistant components.

Consumer goods

Decorative metal parts, handles, and fittings with consistent finish.

FAQ

Casting — frequently asked questions

Send your drawings or 3D files. Most quotes come back within a few hours on business days, never more than 24 hours.
Yes. All customer files and ideas are treated as confidential. We sign NDAs when needed.
Yes. Our engineers review your design and suggest changes that cut cost, improve quality, or speed up delivery.
For Casting, we support one-off prototypes and full production runs. There is no strict MOQ.
Yes. We can make samples for your approval. Sample cost depends on the process, and it can be credited back on a production order.
Casting lead time usually starts from 10–25 business days, depending on process, material, tooling, quantity, and complexity.
Yes. We support one-off prototypes, small bridge runs, and full production volumes from the same process family.
Send us your drawing. We compare cost, tolerance, surface finish, and quantity. Then we recommend the best option for your part.
Yes. We provide CNC machining, drilling, tapping, and surface finishing in-house. You get a ready-to-use part, not just a raw casting.
Yes. We ship worldwide by air or sea. We handle export documents, packing, and tracking.

Need casting from a trusted China manufacturer?

Send your files and get a factory-direct quote within 24 hours. No middleman. No vague answers.

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