Founded with a focus on manufacturing excellence, Dongguan SX Technology Co.,Ltd has developed rich expertise in precision lost wax casting (investment casting), CNC machining, and industrial mechanical assembly. Our manufacturing capabilities serve demanding engineering sectors worldwide, including machinery production, automotive systems, marine and shipbuilding industries, subsea and surface equipment, valves and pumps, electronic appliances, packaging lines, watchmaking, civil construction, and heavy chemical processing.
We work with a broad spectrum of engineering materials to meet exact mechanical requirements. For investment casting, our core specializations include high-grade stainless steel and carbon steel alloys. For post-casting CNC refinement and custom component machining, our capacities cover titanium alloys, stainless steel, carbon steel, aluminum alloys, copper alloys, and cemented carbides. Armed with advanced manufacturing equipment, we ensure rapid lead times and strict adherence to geometric tolerances.
Investment casting, historically known as lost wax casting, is one of the oldest metal-forming techniques, yet it remains at the cutting edge of modern manufacturing. This process is essential for producing parts with complex geometries, tight tolerances, and excellent surface finishes that are difficult or impossible to achieve with other fabrication methods like welding, sand casting, or forging.
At Dongguan SX Technology Co.,Ltd, we have refined the step-by-step casting process to control shrinkage, minimize internal porosity, and optimize mechanical properties:
We begin by designing and manufacturing a high-precision metal die (usually aluminum or steel). Melted wax is injected into this die under pressure to create a highly accurate replica of the final component. Multiple wax patterns are then assembled onto a central wax sprue to form a casting tree.
The wax tree is dipped into a liquid ceramic slurry and then coated with fine sand (stucco). This process is repeated several times, with drying periods in between, to build a thick, heat-resistant ceramic shell around the wax model.
The shell is placed in a steam autoclave where the wax is melted and drained out, leaving behind a hollow cavity. The ceramic shell is then heated to over 1000°C (sintered) to strengthen the mold and remove any remaining trace residues.
Molten metal, verified by optical spectrometry, is poured into the pre-heated ceramic shell. Once the metal cools and solidifies, the ceramic shell is broken away through vibration and media blasting to reveal the raw cast metal parts.
While investment casting offers near-net-shape parts with surface finishes averaging Ra 3.2 to 6.3 microns, critical features such as threaded holes, mating surfaces, and high-precision bores require post-casting machining. Dongguan SX Technology Co.,Ltd provides an integrated, single-source solution by housing both an investment casting foundry and a fully equipped, multi-axis CNC machining shop.
This vertical integration provides major benefits to global buyers:
| Material Family | Casting Capability | CNC Machining Capability | Key Applications |
|---|---|---|---|
| Stainless Steel (e.g., 304, 316, 17-4 PH) | High (Excellent fluid flow & detail) | High (Demands rigid setups) | Valves, marine impellers, food machinery |
| Carbon Steel (e.g., WCB, 1020, 1045) | High (Cost-effective structural parts) | High (Standard tooling) | Agricultural machinery, automotive brackets |
| Titanium Alloys (e.g., Grade 5 / Ti-6Al-4V) | Specialized (vacuum melting required) | Excellent (High-speed, coolant-fed tooling) | Aerospace brackets, medical components |
| Aluminum & Copper Alloys | Medium (Typically die cast, but possible) | Excellent (High-speed machining) | Electronics housings, heat sinks, busbar terminals |
Global procurement teams in the US, Europe, and Asia-Pacific must balance cost efficiency with supply chain resilience and strict quality standards. At Dongguan SX Technology Co.,Ltd, we address these challenges through structured solutions:
Every casting run is linked to a specific heat number. We supply material test reports (MTRs) according to EN 10204 3.1 standards, including chemical analysis and mechanical testing results (tensile strength, yield strength, elongation, and hardness).
Our location in Dongguan gives us access to a complete manufacturing ecosystem. We source high-grade raw metals, waxes, and tooling elements locally. This allows us to offer competitive pricing without compromising on quality or engineering standards.
We work closely with your design engineers before mold-making begins. Through Design for Manufacturing (DFM) reviews, we identify opportunities to add draft angles, optimize wall thicknesses, and avoid sharp internal corners, helping you prevent defects and reduce costs.
Quality is the cornerstone of the manufacturing industry. We firmly believe that only by controlling quality well can we survive, develop, and grow. Therefore, we have worked in this industry since 2014, continuously improving our production capabilities and expanding our inspection infrastructure.
Our quality control workflow includes:
The investment casting sector is evolving with the adoption of advanced manufacturing technologies. Dongguan SX Technology Co.,Ltd follows these industry developments to improve our service offerings:
For low-volume production or prototype verification, we use 3D-printed SLA (stereolithography) wax or PMMA patterns. This bypasses the need for steel tooling, reducing prototype delivery times from weeks to days.
We use solidification analysis software to simulate heat transfer, fluid flow, and shrinkage during pouring. This helps us optimize gate and riser placement, reducing internal porosity defects before physical production starts.
High-performance alloys like Titanium and 17-4 PH Stainless Steel require specialized CNC setups. We invest in high-torque, rigid spindle machining centers to maintain precise tolerances on challenging cast alloys.
SX Machining