Investment Casting
We established precision casting foundry in Ningbo in 1999, and now we have became a famous precision caster in China, we now have more than 150 employees in foundry including 20 quality engineers and 5 technique engineers.
After the establish of our machining workshop, we breaking out of the traditional practice that foundry only providing casting, we also created new concept that are providing finished parts, as well as good customer service.
With expertise in the production of thin wall castings to 0.5mm, LC casting is well equipped to provide complex shapes to close tolerances, high standards of finish, and stringent testing and inspection.
Our advantage
Foundry ISO 9001 certificated.
We have a water class production line and sodium silicate line.
Lead time that are flexible to suit our customer's needs.
Both design and rapid prototyping services are available .
We can suggest a most suitable and economic process to save your budget.
Casting raw Parts are 100% inspected before turn into machining.
Main materials for investment casting
Stainless steel
Carbon steel
Other materials can also be casted, please enquiry us for the details.
The Process of Lost wax casting:
1. Rough Sculptor making: A creative artist makes an original sculptor or mold or an artwork by using raw material like wax, plaster of Paris or clay. A mixture of oil based clay and wax is preferred as these materials retain their softness.
2. Final Mold Making: A mold is then made as per the original sculptor. The mold is made up of two pieces and a key with shim is placed between the two pieces during construction so the mold can be put accurately back together. Molds are generally made using plaster or fiberglass or any other material that may be suitable. An inner mold of latex or vinyl or silicone is put pup preserve the details of the original art work. Generally, the original art work made of plaster mold cracks and breaks during the initial phase of deconstruction. Many a times, numerable molds are required to get the exact replica of the original art work.
3. Filling up the mold: Once the latex and plaster mold is complete and finished, molten wax is poured into the mold till it gets an even coating all around the mold. The thickness of the wax coating is around 1/8 inch. This process is then repeated until the desired thickness is achieved.
4. Removal of wax replica: The hollow wax replica of the original art work is then removed from the mold. The original mold can be used for making more wax replicas, but due to the wear and tear of the original mold the reuse of the mold is limited.
Softening: Each wax mold is then chased or softened using heated metal tools. The metal tools are rubbed around portions that show cracks or the joining line of the mold, where the pieces have come together. Separately molded wax pieces are then heated and attached. The finished mold is then dressed in order to hide any imperfections. The final piece then looks like a bronze sculpture.
5. Making paths for molten bronze: It is also known as "spuring", in short the wax copy is then branched with treelike wax, so that the molten bronze reaches the right parts and also it helps the air to escape. The critical and careful spuring begins from the top of the wax copy. The top of the copy is attached to by wax cylinders to different points on the wax copy.
6. Slurry, burnout, testing, pouring, release, metal-chasing, and painting are the final steps in the process of Lost Wax Casting.
Rentech Industry Technology Co., Ltd is engaged in the professional manufacture of all kinds of investment casting, Sand casting, die casting, as well as forging and precision machining. And we also have multi experience for business in field of oil wellhead equipments, Steel sheet/coil processing machinery. We have rich and professional capability on laser cutting & bending processing. Our products are used in the industry of automobile, mineral machine, railroad, pump&valve, gearbox, hardware tool, building reconstruction, engineering machines etc. The factory has developed more than hundred types and specifications. Some are for domestic market, many of them are exported to districts and areas in Japan, US, Canada and Australia.
In 2006, we built our machining plant, which is specilized in precision machining and quality control from raw material to finish. In the mean time, we also invest another die casting foundry in Zhenhai district, which now own 10 die casting machine.
During the business in the field of precison casting, we also have tried to develop sand casting project with our old customer, and now we have gained much experience in this field. After selecting high quality sand casting supplier in Ningbo and nearby, now we have more than 5 sub-factory which can supply us tens of thousands of tons raw parts per year for machining.
Now we also have tight cooperation with Yuanyang factory which has rich experience for manufacturing of Coil/Sheet steel processing machinery lines. We have more than 80 workers including engineers and quality control people. Our shearing machine line and slitting(Cut to length) machine line have been exported to Eastsouth Aisa, Middle East, Africa and Europe.
From 2015, We established coorpartion with Zhongbo factory, which has more than 10 years in the field of manufacturing of coolers & Aluminum plate-fin heat exchanger.
