Explore our high-precision casting and CNC machined solutions engineered to meet rigorous international standards.
Established in 2014, Dongguan SX Technology Co.,Ltd has built a solid reputation as a leading manufacturer specializing in precision investment casting, CNC machining, and comprehensive assembly services. Over the past decade, we have honed our techniques and advanced our technological infrastructure to respond quickly and reliably to our clients' engineering challenges.
The global demand for high-quality aluminum investment castings is driven by lightweighting requirements across vital modern sectors.
Reducing deadweight translates directly to fuel efficiency and payload capabilities. Modern aerospace structural assemblies depend on aluminum's outstanding strength-to-weight ratio.
With the electrification of vehicles, aluminum castings play a pivotal role. Every kilogram saved offsets the weight of heavy battery arrays, expanding vehicle ranges and boosting structural integrity.
From ocean depths to manufacturing plants, silicon-aluminum compounds resist salt-spray oxidation and handle abrasive stresses under extreme environments, lowering maintenance intervals.
While high-pressure die casting is optimal for thin-walled, high-volume projects, investment casting (lost-wax process) offers unmatched design freedom, near-zero porosity, thinner draft angles, and superior surface finishes. This makes it the preferred route for safety-critical components that must undergo strict radiographic and dye-penetrant testing.
Choosing the correct aluminum alloy determines the success of the investment cast piece. Refer below for key mechanical designations.
Our foundry works under strict metallurgical guidelines to control alloy composition, gas porosity, and cooling rates. This results in uniform mechanical integrity across thin walls and thick junctions alike.
| Alloy Designation | Silicon Content (%) | Magnesium Content (%) | Tensile Strength (MPa) | Primary Application Fields |
|---|---|---|---|---|
| A356 / ZL101A | 6.5 - 7.5 | 0.25 - 0.45 | 220 - 290 | Aerospace structural assemblies, automotive steering knuckles, high-pressure pump housings. |
| A380 / A383 | 7.5 - 9.5 | 0.1 Max | 310 - 330 | Engine brackets, electronic equipment housings, consumer electronics frames. |
| Al-Si-Mg Series | 9.0 - 11.0 | 0.45 - 0.6 | 280 - 320 | Marine propulsion parts, specialized oil valves, heavy-duty electrical fittings. |
| ZL104 | 8.0 - 10.5 | 0.17 - 0.35 | 240 - 270 | Pneumatic tool parts, diesel engine crankcases, lightweight hardware fittings. |
A tour inside Shixin's advanced facility shows how we control consistency and meet strict specifications from raw materials to final finishes.
Equipped with multi-axis CNC milling machines, precision turning equipment, and optimized wax injection units, our plant layout supports both prototyping runs and high-volume output. The integration of CNC machining directly with casting allows us to execute precise secondary operations on critical features, achieving tolerances within narrow bands.
By utilizing high-grade ceramic shell building materials, we reduce surface roughness, minimizing post-processing time. This hybrid capability distinguishes us from standard casting foundries.
At Dongguan SX Technology Co.,Ltd, quality control is the core of our manufacturing processes. We employ professional testing equipment and dedicated QC personnel to monitor dimensional tolerances, chemical compositions, and physical characteristics.
Our facility maintains strict inspection routines, from spectral analysis of incoming raw aluminum ingots to coordinate measuring machines (CMM) and non-destructive testing (NDT) for internal defects. By maintaining high quality control standards, our parts consistently meet the demands of safety-critical fields.
Since starting in this industry in 2014, we have updated our equipment and refined our capabilities to support client requirements for dimensional accuracy and structural integrity.
How our casting and machining services solve physical and environmental challenges across the globe.
Deep-sea exploration demands materials that withstand extreme hydrostatic pressure and chemical corrosion. We supply custom-machined titanium and optimized aluminum alloys designed to resist galvanic degradation.
Typical Parts: Transducer housings, control manifolds, sensor clamps.Components inside transit vehicles must handle high cycle loads and wear. Our casting solutions provide high fatigue limits, reducing component failures and supporting passenger safety.
Typical Parts: Seat mounting links, heavy armrest brackets, security lock components.Impellers and turbomachinery require high dimensional accuracy to prevent aerodynamic imbalance at high RPMs. We integrate five-axis machining with casting to meet these geometric requirements.
Typical Parts: Closed impellers, diffuser rings, compressor casings.Staying ahead in casting technology requires continuous integration of digital modeling and material science developments.
By using SLA and SLS 3D printed patterns, we can skip traditional tooling phases for prototypes, delivering cast parts in days rather than weeks.
Computer-aided solidification modeling helps analyze flow and heat transfer beforehand, predicting hotspots and shrinkage porosity before cutting tools touch metal.
We use recyclable shell binders and energy-efficient induction furnaces to reduce emissions and minimize environmental footprint.
Our production system complies with global standards, ensuring traceability from raw metal batches to final machining steps. Whether manufacturing parts for critical rail infrastructure or complex marine pumps, our processes are designed to deliver reliable performance.
Get answers to common technical and logistical questions regarding aluminum investment casting and CNC machining services.
Generally, the standard linear tolerance for aluminum investment casting is ISO 8062-3 Grade DCTG6 to DCTG8. For tighter requirements, we use secondary CNC milling and turning to achieve tolerances within ±0.01mm, ensuring alignment for critical mating surfaces.
Silicon-magnesium aluminum alloys like A356 or ZL101A offer good corrosion resistance, fluid castability, and high mechanical properties. If needed, anodizing or chemical conversion coatings can provide further surface protection.
We use a combination of solidification software simulation to avoid hot spots, liquid gas testing of molten metal batches, and radiographic (X-ray) inspections when required. This helps verify the integrity of high-stress components.
Standard tooling design and pattern construction generally take 21 to 30 days, followed by sample delivery within 7 to 10 days. For rapid prototype requirements, we also offer 3D-printed patterns to bypass the initial tooling step.
Browse our additional range of titanium, stainless steel, and aluminum components engineered for complex mechanical applications.
SX Machining
