Sinoway offers production services and products made through the precision lost wax investment casting process.

The history of the investment casting process can date back to the Bronze Age. The precision investment casting applied in the modern industry evolved from the traditional lost wax casting process.

Sinoway has been involved in the investment casting process since the 1990s. From the water-glass shell process to the silica-sol shell process, we have continued to manufacture more and more accurate and complex casting products used in more and more industries. As a metal casting service supplier, we equipped the foundry with advanced testing instruments such as molten iron analyzers, spectrometers, and metallographic microscopes to guarantee the casting metal’s grade and mechanical properties.

Our lost wax investment casting products ranged from grams to kilograms (usually less than 25kg). The casting materials include carbon steel, alloyed steel, stainless steel, and other metal alloys. Meanwhile, we have our own CNC machining workshop, where we can make wax-pattern molding and subsequent machining of casting blanks to meet customers’ one-stop requirements.

If you have a metal part that needs to be customized, either for prototype or mass production, contact us now and immediately take advantage of our services.

Lost wax casting products made in Sinoway foundry

What is a lost wax investment casting process?

The investment casting process is a kind of metal forming technology with a very long history. And when we use a wax pattern for the casting, investment casting is also known as a lost wax casting process.

The types of alloys produced by the investment casting process include carbon steels, alloy steels, heat-resistant alloys, stainless steels, precision alloys, permanent magnet alloys, and bearing alloys, copper alloys, aluminum alloys, titanium alloys, and ductile iron.

Generally, the lost wax investment casting process suits products with complex shapes better. The minimum diameter of the hole that we can cast out directly reaches as small as 0.5mm, and the minimum wall thickness can reach 0.3mm. We can usually change one product during the production procedures, which is combined initially from several parts, into a single piece that we can make it out entirely via the investment casting process to save more time and raw materials.

The process is complicated and not easy to control. Also, the auxiliary materials are expensive, so investment casting is more suitable for manufacturing products with complex shapes, high precision requirements, and difficulties of being machined, such as turbine engine blades, etc.

There are several procedures involved in the investment casting process.

1. Molding – Design and make the molds used to produce single wax models;
2. Pattern-making – Trim the wax models and assemble them to form a wax pattern tree;
3. Shell-making – Coat the wax patter tree with the shell materials and repeat several times to a specific thickness, and then dry the shell thoroughly in the air at a particular temperature;
4. Dewax – Melt or vaporize the wax pattern tree in the shells and remove the wax;
5. Shell burnout preheating– Bake the shells to remove the moisture and residual wax;
6. Casting – Melt the applied metals and pour the molten metal into the shells;
7. Castings divesting – Knock off the shells and separate the castings, and then cut off the workpieces and grind them to remove the cutting residues;
8. Heat treatment – Apply the heat treatment to the metal castings as per requirements;
9. Machining – If necessary, machine the dimensions to the required tolerances;

Lost-Wax Investment Casting Processes

Advantages of the lost-wax investment casting process include

• The dimensions of the investment casting parts are highly accurate
• The surface roughness of the castings is much smoother than other casting processes
• There is no flash or molding line on the investment casting parts
• Almost any kind of metals suit the investment casting process
• Suitable for products with complex shapes and structures

Why Choose Sinoway foundry for your metal investment casting products?

Based on more than 20 years of practice, and overall technical support from our experienced engineering team, Sinoway can supply customers with the most optimal solution to choose the right casting process and material, which expects to save 10% in costs for their project. Meanwhile, due to our service team’s quick response, we are always there any time when you need us, saving time for both of us.

Benefits of Sinoway cast foundry include:

1. Our production facilities have automated wax injecting machines, wax pattern production lines, automatic shell drying system, electric induction furnaces up to 2T, and testing instruments including molten iron chemical composition analyzer and spectrometer, and metallographic microscopes.
2. Sinoway can manufacture castings made of all kinds of metal alloys from several grams to more than 20kgs. We can meet all your requirements, from prototyping to mass production.
3. A technology supporting team that includes both hands-on production engineers coming from the workshop and professional design engineers from modern universities;
4. In addition to the lost wax investment casting production lines, Sinoway also has other casting processes, including sand casting, lost foam sand casting, pre-coated sand mold casting, and die casting. And Sinoway also supplies other metal part production lines such as sheet metal stamping, drop forging, CNC machining, Welding, and surface treatment to meet customers’ demands for one-stop service of manufacturing the whole set of their products.

Quality control policy of Sinoway foundry

Sinoway has established our quality management policy strictly following the ISO 9001 standard in the casting foundry. We require every step of the order execution to be managed and controlled according to this policy to provide customers consistent quality products and services.

Our quality management policy includes the following aspects.

• Molten metal composition analysis before each casting procedure;

• Sample quality inspection, including dimensions, chemical composition, and mechanical properties;

• Mass production casting procedure monitoring;

• Quality inspection after mass production;

• Packaging and transportation inspection;

• All tests must have traceable inspection reports on file.

Win-Win Cooperation

With our specialty in metal parts production, we have been serving many customers engaged in different industries like Home Appliances, Construction, Automobiles, Heavy Equipment, etc.