MANUFACTURING PROCESS
Investment Casting
Discover high-precision, near-net-shape components with intricate geometries and excellent surface finishes.
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Manufacturing Capabilities
Choose the Manufacturing Route Around the Part Requirements
The best manufacturing process is not always the process a drawing starts with. Geometry, alloy, annual demand, functional interfaces and inspection requirements should be reviewed together.
TIANHUI MACHINE supports investment casting, sand casting, die casting, forging and CNC machining for drawing-based OEM components. Primary forming, secondary machining, finishing and inspection can be coordinated as one project route where the finished component requires it.
01 / Core Manufacturing Processes
Five Routes for Different Part Requirements
Use the process pages for detailed capability, DFM, tooling, secondary operations, quality controls and typical applications.
MANUFACTURING PROCESS
Sand Casting
Ideal for large, heavy-duty metal components with flexible production volumes and cost-effective tooling.
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MANUFACTURING PROCESS
Die Casting
Efficient high-volume production delivering durable, thin-walled parts with tight tolerances and smooth surfaces.
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MANUFACTURING PROCESS
CNC Machining
Achieve extreme precision, tight tolerances, and custom geometries for both quick prototypes and production runs.
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MANUFACTURING PROCESS
Forging
Engineered for maximum mechanical strength, fatigue resistance, and structural integrity under high-stress applications.
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02 / Process Comparison
Which Manufacturing Process Fits Your Component?
This comparison is a sourcing guide, not a substitute for drawing review. The final route depends on geometry, alloy, quantity, tolerance, surface condition and functional risk.
| Process | Best Fit | Production Logic | Typical Secondary Work |
|---|---|---|---|
| Investment Casting | Complex geometry, fine features, engineered alloys and near-net-shape parts. | Tooling supports development through repeat OEM production where geometry and material justify the route. | CNC machining, heat treatment, cleaning, polishing/passivation and inspection as specified. |
| Sand Casting | Larger or heavier castings, core-intensive passages and practical tooling economics. | Useful from development and lower volumes through repeat industrial production, depending on pattern and molding route. | CNC machining, heat treatment, blasting, coating, pressure/leak testing and inspection when required. |
| Die Casting | Repeat-volume non-ferrous components requiring consistent geometry and efficient cycle production. | Tooling investment becomes more practical when repeat volume and stable geometry justify the die. | Trimming, deburring, CNC machining, finishing, coating and project-specific testing. |
| Forging | Load-bearing, fatigue-sensitive or strength-critical mechanical components. | Tooling and material-flow design support repeat production where mechanical performance is central to the part. | Heat treatment, CNC machining, grinding, induction hardening, NDT and finishing where specified. |
| CNC Machining | Critical dimensions, datums, bores, threads and finished interfaces; also direct-from-stock parts. | Suitable for prototypes, low-volume work, repeat machining and finishing of cast or forged blanks. | Grinding, heat treatment, surface finishing, cleaning, marking, assembly and final inspection. |
Buyer noteIf two processes appear technically possible, compare tooling, machining allowance, annual volume, inspection scope and total finished-part cost—not only the raw-part price.
03 / Engineering & RFQ Review
What We Review Before Quotation and Production
The same component can sometimes be produced by more than one route. These inputs define the manufacturing risk, tooling approach, machining scope and inspection plan.
Part Geometry
Complexity, wall sections, cores, draft, undercuts, transitions and critical features.
Material & Service
Specified grade, mechanical performance, corrosion, temperature, wear and operating environment.
Tolerances & Datums
Critical dimensions, fits, datum structure, machined interfaces and functional relationships.
Surface Requirements
As-produced condition, roughness, sealing faces, appearance and finishing requirements.
Production Volume
Sample demand, forecast quantity, annual volume and repeat-order expectations.
Secondary Operations
Machining stock, heat treatment, surface finishing, assembly and other post-process work.
Inspection
Material, dimensional, mechanical, NDT, functional and customer-specific verification requirements.
OEM Documentation
Drawing revisions, FAI/PPAP where required, traceability, certificates, reports and packaging expectations.
04 / Integrated Manufacturing
From Raw Material or Near-Net Shape to Finished Component
The production route can be planned around the finished drawing so machining allowance, heat treatment, surface requirements and inspection are considered before the first part is produced.
Drawing & DFM
Review geometry, material, quantity, tolerances, functional requirements and likely process risks.
Primary Process
Select casting, forging or direct machining around technical fit and production economics.
Secondary Operations
Plan CNC machining, heat treatment, finishing, testing and assembly where the project requires them.
Inspection & Release
Verify critical requirements and agreed documentation before packaging and shipment.
05 / Secondary Operations & Value-Added Services
Source More of the Finished Component Through One Project Route
Depending on the part, Tianhui can supply raw parts, rough-machined parts or completed components with agreed secondary operations and inspection.
CNC Machining
Finish datums, bores, sealing faces, threads, interfaces and other critical features after casting or forging.
Heat Treatment
Coordinate specified heat-treatment routes around alloy, hardness and mechanical requirements.
Surface Finishing
Support blasting, polishing, passivation, coating and other finishing requirements according to the drawing.
Inspection & NDT
Plan dimensional, material, hardness and project-specific NDT requirements according to part risk and specification.
Functional Testing
Pressure, leakage, balance, torque or application-related checks can be reviewed where relevant to the component.
Assembly, Marking & Packaging
Review sub-assembly, part marking, preservation and export packaging requirements before shipment.
Scope noteNot every secondary operation is performed in-house. Where specialist processes are required, the production and inspection scope can be coordinated with qualified external partners and defined during quotation.
06 / Quality & Documentation
View Quality Control → Evidence Should Follow the Critical Requirements
Inspection is most useful when it is connected to drawing risk, process risk and the final function of the component.
Material Verification
Material grade, chemistry or related documentation can be checked according to the agreed project scope.
Dimensional Inspection
CMM, measuring equipment and gauges are applied according to critical dimensions, datums and drawing requirements.
Process-Specific Testing
Hardness, surface, NDT, pressure/leak or other tests are selected where relevant to the process and application.
Project Documentation
Inspection reports, material records, traceability, FAI or PPAP documentation can be reviewed where the customer requires them.
07 / Real Manufacturing Proof
All Case Studies → See How Process Choices Work on Actual Components
Case studies show the relationship between material, forming route, machining, critical features and inspection on real manufacturing projects.
CASE STUDY
316L Stainless Steel Hydraulic Metering Diaphragm Pump Head
Tianhui manufactures 316L Stainless Steel Pump Head with precision manufacturing processes, quality control and engineering expertise for industrial application...
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CASE STUDY
Stainless Steel Precision Casting For Road Snow Removal System
Tianhui manufactures Stainless Steel Precision Casting with precision manufacturing processes, quality control and engineering expertise for industrial applicat...
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CASE STUDY
Precision Machined Stainless Steel Sluice Valve Components
Tianhui manufactures Stainless Steel Valve Components with precision manufacturing processes, quality control and engineering expertise for industrial applicati...
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08 / What to Send
Give Engineering Enough Information to Review the Part Properly
A complete RFQ reduces assumptions and makes process, tooling and inspection discussions more useful.
Request for Quotation
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Have a Component to Manufacture?
From casting and forging to precision CNC machining, TIANHUI MACHINE provides integrated manufacturing services for custom metal components. Our China factory supports different materials, geometries and production volumes, helping OEM customers select an efficient manufacturing process and achieve reliable quality from prototype to production.
Send your drawing, 3D model, sample or technical requirements. We can review process selection, tooling, secondary operations, inspection scope and quotation assumptions together.