EuroCast's Investment Casting Process

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EuroCast's Investment Casting Process

  • Company News
  • 27/07/2018 11:10:53 AM
  • 1580

EuroCast JSC utilizes the advanced investment casting technology for manufacturing of casting products. The company is capable to supply high quality mechanical components in various conditions like raw, semi-finished, finished, or production as per customer’s demand. EuroCast JSC. is able to provide casting products to the various industries according to their standard requirements and also in customized size, wide range of materials. In order to assure the highest product quality, every steps of the production process is trictly controlled and inspected. The following are the investment casting process using inside EuroCast JSC.  

1. Tooling Making


Quy trình đúc mẫu chảy công ty EuroCastQuy trình đúc mẫu chảy công ty EuroCast 2To achieve precision products by investment casting, making tooling is the first step to start investment castings. Such tooling or pattern will be precision machined by CNC center. Then the tooling cavity is polished, surface treatment (if necessary) in order to achieve the required surface quality of product.

 2. Wax Injection

Đúc mẫu sáp 1 

Đúc mẫu sáp 2

Wax sample is made by injection molding process, the liquid wax is injected into the mold (tool), after solidifying (by cooling), the wax sample is ejected from the mold.

3. Wax pattern assembly

Ghép cây các mẫu sáp 1

Ghép cây các mẫu sáp 2

The wax samples are then assembled into wax sample tree on the same sprue. Then, the wax sample trees are cured at room temperature.   

4. Shell building

Tạo vỏ 1

Tạo vỏ 2tạo vỏ 3

In this step, the pattern assembly will be dipped into a ceramic slurry, and coated with a refractory material. This process needs to be repeated several times until reaching a certain thickness and strength. Thus, the ceramic shell is built and then dried in an atmospherically-controlled environment.    

 5. Dewaxing and Heating the shell

Thoát sáp và nung vỏ  1Thoát sáp và nung vỏ  2

Thoát sáp và nung vỏ 3

Placing the shell in a steam autoclave and rapidly heated, so that the wax will be melt and run out through the gate and pouring up under high temperature. The ceramic shell molds must be fired to burn out the last traces of pattern material and to preheat the mold in preparation for casting, usually in the range of 800 - 1200 degrees Celcius. So investment casting also named as “lost wax casting”.

6. Casting

Đúc (rót kim loại nóng chảy vào vỏ) 1

Đúc (rót kim loại nóng chảy vào vỏ) 2

Casting is the key step in the whole investment casting process. After dewax, we will first melt the steel ingots into liquid status, and pour the liquid metal into the sprue, then cool it under room temperature for a while.  

 7. Knock out the shell

Phá vỡ vỏ và lấy vật đúc 1

Phá vỡ vỏ và lấy vật đúc 2

Break the ceramic shell and the casting products are taken out. The breaking shell process is done manually or using the ultrasonic vibration.

 8. Remove the gate, sprue and runner system

Cắt kênh dẫn khỏi vật đúc và mài nhẵn miệng rót

Cắt kênh dẫn khỏi vật đúc và mài nhẵn miệng rót 2Cắt kênh dẫn khỏi vật đúc và mài nhẵn miệng rót 3

Cut the individual investment castings from the sprue. Finally remove the excess metal from casting body by grinding.

9. Shot Blasting/Sand Blasting

Phun cát 1

Phun cát 2

To remove scales and achieve better surface finish, investment castings will be shot blasted or sand blasted by small steel balls. So all the foundries must be equipped with shot blasting machines.

10. Heat Treatment

Nhiệt luyện 1Nhiệt luyện 3

To improve the mechanical properties of casting blanks, heat treatment is usually done after finishing castings. Main heat treatment processes are: Normalizing, tempering, annealing, hardening and tempering, carburizing, ect. The heat treatment is done as per the customer’s requirement.

 11. Inspection and Quality Control

Kiểm tra chất lượng sản phẩm trước khi giao cho khách hàng 1

Kiểm tra chất lượng sản phẩm trước khi giao cho khách hàng 2Kiểm tra chất lượng sản phẩm trước khi giao cho khách hàng 3

Inspection and Quality Control is also a necessary step in our investment casting process for qualified products. Our engineer will do dimensional inspection, 100% surface inspection, inner defects inspection and other inspection jobs according to requirements of products. Only ensure all the products are qualified, can we arrange delivery to our customers.

12. Anti-rust Oil Painting and other Surface Treatments

Sơn phủ dầu chống rỉ hoặc xử lý bề mặt 1Sơn phủ dầu chống rỉ hoặc xử lý bề mặt

Normally, the stainless-steel products do not need to anti rust treatment. However, in order to protect products from rusting, the castings products will be dipped into anti-rust water or oil. Of course, other surface treatments can also be performed in this step like paint spraying, galvanizing, ect.

13. Package and shipping

Đóng gói và vận chuyển 1

Đóng gói và vận chuyển 2

As all the products are exported to overseas market. So, normally we will pack investment castings with polybags, and then put them into standard wooden cases. Of course, all the package must be carried out on the basis of free from damage. We can also supply custom package service according to customers’ special requirements.


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