Rock Mining Smith runs its investment casting, shot blasting and sand blasting lines out of Udyog Vihar, Gurgaon. Every stage below is shown with the actual reading it runs at — degrees, metres per second, or psi — so what you see is what happens on the shop floor.
Precision Manufacturing for High-Quality Industrial Components
Investment casting, also known as the Lost Wax Casting Process, is one of the most accurate metal casting methods used to manufacture complex and precision-engineered components. The process provides excellent dimensional accuracy, smooth surface finish, and minimal machining requirements.
Rock Mining Smith manufactures premium-quality investment castings for mining, construction, automotive, engineering, railway, and heavy industrial applications using advanced technology and stringent quality control.
After heat treatment, cast components undergo the shot blasting process to remove scale, oxidation, rust, and surface impurities. High-speed steel shots clean the casting surface and prepare it for machining, painting, or coating.
Sand blasting is performed after furnace treatment to remove ceramic shell, casting residue, burrs, and contaminants. Abrasive sand produces a clean, smooth, and uniform surface suitable for machining and protective coatings.
Our investment castings are widely used in mining, construction, oil & gas, railway, agriculture, power generation, heavy engineering, automotive, and industrial machinery. Every product is manufactured to meet international quality standards with precision, strength, and reliability.
Also called lost-wax casting — a wax pattern is built up in ceramic shell, then burned out and replaced with molten metal. Each stage below runs at a specific, controlled temperature.
Molten wax is injected into a metal die to form an exact replica of the finished part, including shrinkage allowance.
Individual wax patterns are attached to a central wax sprue, forming a "tree" that lets several parts be shelled and cast together.
The tree is repeatedly dipped in ceramic slurry and coated with refractory stucco, building up a hard shell over several drying cycles.
The shell is flashed in a steam autoclave under pressure, melting the wax out quickly before the shell can crack from expansion.
The empty shell is fired in a kiln to remove residual wax and moisture, and to develop the strength needed to hold molten metal.
Molten alloy is poured into the still-hot shell straight from the furnace, filling every cavity left by the burned-out wax.
Cast trees cool to room temperature, then the ceramic shell is broken away by vibration and water blasting to expose the metal parts.
Parts are cut from the sprue, ground smooth, then checked dimensionally and for internal defects before moving to finishing.
Once castings come off the furnace line, steel shot is thrown at the surface at high velocity — stripping scale and sand, and compressing the surface layer for better fatigue life.
Castings arrive from the knockout stage still carrying oxide scale and traces of shell sand, and are batched by size for the blast cabinet.
Parts are loaded into a rotating tumblast barrel or hung on a monorail, depending on geometry, so every face gets even coverage.
A turbine wheel throws round steel shot at the castings, knocking off scale and sand and leaving a uniform, slightly peened surface.
Spent shot, dust and broken media fall through a screen deck; a magnetic separator recovers reusable steel shot back into the wheel.
Blasted parts are checked for surface finish and residual scale before being passed on to machining or sand blasting for finer work.
Where shot blasting is the heavy first pass, sand blasting handles the finer cleaning — removing rust, light scale, and preparing surfaces for coating or paint.
Machined faces, threads and datum surfaces that must stay untouched are masked off before the part enters the blast booth.
Silica sand, aluminium oxide or garnet is chosen based on the base metal and the finish the next process — machining or coating — needs.
Media is propelled through a nozzle at controlled air pressure, stripping rust and light scale without gouging the base metal.
A cyclone dust collector pulls fines out of the booth while usable media is screened and returned to the hopper for reuse.
Parts are blown down, wiped free of residual grit, and inspected against the finish spec before packing or coating.
General engineering and structural casting grades.
Corrosion-resistant castings for valve and pump bodies.
Higher-volume components where iron is the right fit.
Every batch checked against drawing before it ships.