Audited Supplier
OEM Custom CNC Machining Parts Precision Stainless Steel Casting Parts
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:
Considering the dimension stability, for the parts bigger than 50kgs to 200kgs,
And with our machining workshops, we can provide you with secondary treatment like:
1. Machining (CNC turning, drilling, milling, grinding)
2. Electro-polishing
3. Hand polishing (mirror polishing, satin polishing which roughness stay 0.2-0.4μm)
4. Metal plating(like chrome & nickel plating)
5. Hot galvanizing or cold zinc coating
Regarding the material we offer lots of material according to customer specifications.
Mainly as below:
1. Carbon steel(C20/C40/C45/WCC/WCA)
2. Stainless steel(304/316/316L/1.4404/1.4435)
3. Duplex steel(2204/F51/4A/5A/6A)
| 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 flexibility1. Made in China, Italy& Germany quality, needed certification
2. 90%+ clients from Italy, Germany, Spain, and USA
3. Significant costs reduction.
4. Quick prototyping.
5. Single contact point for the supply of metal parts.
6. Wide range of products.
7. Use of the the most modern technologies.
8. Skilled staff present on the Chinese market.
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.
With own facilities, Tonsin can offer to you all the process from mold design, raw casting production, machining, fabrication in-house, with quality fully control at competitive price .
Tonsin Machinery welcomes the opportunity to handle your complete projects, from raw castings to full machining production. Contact us today and we will help you get the right part at the right time.
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.
Advantages of Investment Casting ( Lost-waxCasting )
› Important cost reduction by getting a high quality and industrialized product.
› Possibility of making products with a complex shape and under cutina single piece by eliminating costly machining or welding.
› Precision melting withvery limit eddimensional tolerances.
› Flexibility of production batches without tooling costs.
› Blow equipment cost that is often depreciated already with the first production order.
› High quality surface finish and possibility of inserting your company logo or code direct lyon the melting.
› Possibility of meltingall materialswhile maintaining their mechanical properties.
A: We are a factory which has been producing metal parts for more than 10 years.
Q: What are your main products?
A: We specialize in manufacturing ball valves and metal parts.
Q: What is surface treatment do you have?
A: Powder coating, zinc plated, nickel plated, tin plated, brass plated, silver plated, gold plated, anodizing, etc.
Q: Can I get the samples?
A: Yes, sample order is available for quality check and market test, and it will be freight collect payment. If simple sample, we will not charge cost; If OEM/ODM samples, we will charge for the sample cost.
Q: What is the MOQ?
A:The MOQ is 100pcs when have the inventory.
Q:What's the delivery time?
A:The standard stamping parts is 3~7days after payment. If OEM or make the mould, we will confirm the delivery time with you.
Q: What's your payment term?
A: Payment terms are flexible for us in accordance with specific conditions. Generally we advise 30%TT deposit, balance be paid before shipment
Q: Do you received OEM/ODM?
A: YES. We have more than 10years OEM experienc.c
