Investment casting, also known as lost wax casting, includes processes such as pressing wax, wax repairing, tree grouping, dipping, wax melting, molten metal casting and post-processing. Lost wax casting is to use wax to make a wax mold of the part to be cast, and then coat the wax mold with mud, which is a mud mold. After the clay mold is dry, put it in hot water to melt the inner wax mold. Take out the clay mold that has melted the wax mold and then bake it into a pottery mold. Once roasted. Generally, the pouring port is left when the mud mold is made, and then the molten metal is poured from the pouring port. After cooling, the required parts are made.

Introduction oF HNYB Investment Casting （Lost Wax Casting）Process

When wax is used to make the shape, investment casting is also called "lost wax casting". Investment casting usually refers to a casting scheme in which a shape is made of fusible materials, a shell is made of refractory materials on the surface of the shape, and then the shape is melted to discharge the shell, so as to obtain a casting shape without parting surface, which can be filled with sand after roasting at high temperature. Because the appearance is widely made of wax material, investment casting is often called "lost wax casting".

The shape of investment castings（Lost Wax Casting） is generally complex. The minimum diameter of the hole that can be cast in the casting is up to 0.5mm, and the minimum wall thickness of the casting is 0.3mm. In the production of some original parts from a combination of parts, by changing the structure of the parts, design into a whole part and directly from investment casting, in order to save the processing time and metal material consumption, make the parts structure more reasonable.

The weight of investment castings （Lost Wax Castings）is mostly from zero to dozens of cattle (from a few grams to ten kilograms, generally not more than 25 kilograms), and it is more difficult to produce heavy castings by investment casting.

The process of investment casting（Lost Wax Casting） is complicated, difficult to control, and the materials used and consumed are expensive. Therefore, it is suitable for the production of small parts with complex shape, high precision requirements, or difficult to carry out other processing, such as turbine engine blades.

What Materials Can Be Cast Used INVESTMENT CASTING（Lost Wax Casting）?

The types of alloys that can be produced by investment casting are carbon steel, alloy steel, heat-resistant alloy, stainless steel, precision alloy, permanent magnet alloy, bearing alloy, copper alloy, aluminum alloy, titanium alloy and ductile iron, etc.

·       HNYB investment castings （Lost Wax Castings） Advantage

Investment castings(lost wax casting) have high dimensional accuracy, generally reaching CT4-6 (sand casting is CT10~13, die casting is CT5~7). The surface finish of investment castings(lost wax casting)  is higher than that of general castings, generally reaching Ra.1.6~3.2 μm. The surface finish of investment castings(lost wax casting)  is higher than that of general castings, generally reaching Ra.1.6~3.2μm. It can cast complex castings of various alloys, especially high temperature alloy castings. For example, the blade of a jet engine has a streamlined outline and an inner cavity for cooling, which can hardly be formed by machining. The investment casting(lost wax casting)  process can not only achieve mass production and ensure the consistency of castings, but also avoid the stress concentration of residual knife lines after machining.