| Customization: | Available |
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| Casting Method: | Thermal Gravity Casting |
| Process: | Lost Wax Casting |
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We provide all kinds of OEM casting services including silica sol casting, water glass, composite, aluminum zinc die casting, sanding casting, gravity
casting, low pressure casting and so on.
For investment casting, we have two processes:
| Product Description | |
| Process | investment casting, lost wax process, silica sol, water glass, composite gravity casting, sand casting, shell molding, aluminum zinc die casting |
| Certification | ISO 9001:/2015; Ad2000/W0; PED 97/23 |
| Material | Steel, Stainless steel, low-medium carbon steel, alloy steel, etc. |
| Application | Food Machinery, valve, pump, Mechanical & engineering, hardware |
| Standard | UNI, DIN, ASTM, AISI, BS, etc. |
| Heat treatment | Normalizing, Quenching, Annealing, carburizing. nitriding, etc. |
| Surface treatment | blasting, polishing, painting, nickel chromium plating, phosphating, anodizing. |
| Machining | CNC turning, milling., drilling, boring, broaching. |
| Packing | Wooden case |
| As per customers' requirements | |
WHY Tonsin?
Leader in raw and processed precision castings: high quality, on-time delivery, competitive prices, and flexibility
Ningbo Tonsin Machinery Industry Inc. was formed in 2006 with the merger of Tonsin Machinery and Xiangshan Hengli Foundry & Machine Company. We have now grown to become one of the most professional investment casting manufacturers.
Investment casting introduction
Investment casting is one of the most used processes in the production of castings with high quality and finishing both in small and large production batches.
The modern derivation of the ancient lost wax process. The wax models are realized using machined or electro discharge machined aluminium moulds. Then, they will be placed into special tanks containing thermosetting resins and micro ceramic granules.
These two elements polymerize together, giving rise to an external coating that withstands the high temperatures of the molten metals.
In order to minimize the issaunce of microporosity on the castings, the so-called "casting cluster" or "Shell" is introduced into a high-temperature autoclave for the complete evacuation of residual wax, obtaining in this way a negative mould ready for the next operation.
At this point, after having preheated the "Shell" or "casting cluster", the molten metal is poured into it and left to cool in an environment with controlled temparature in order to avoid any metal work hardening.
The external coating will be destroyed and the castings will be removed singularly, before being submitted to machining or surface finishing.
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