Yes, Shell casting is a type of investment casting. Shell casting, also known as investment casting or lost wax casting, is a process in which a shell is formed by coating a fusible model with refractory materials, then heating the model to melt and discharge it, and finally injecting molten metal into the shell.
The core of investment casting is to first make a mold with fusible materials, then cover the mold surface with refractory materials layer by layer to build a shell. When the mold melts, the shell can be discharged smoothly, thus forming a casting without a parting surface.
The specific steps of shell casting include:
Mold preparation: Make a fusible mold according to the shape of the part to be cast.
Mold coating: Use refractory materials (such as ceramsite, quartz sand, etc.) mixed with a binder and coated on the surface of the fusible mold to form a uniform shell. It is usually necessary to apply multiple times, and wait for it to dry after each application.
Shell hardening: After the shell is dry, it is hardened to improve its strength and refractory properties. The hardening method can be natural hardening or hardening by heating.
Burn out the mold: Put the shell containing the fusible mold into a high-temperature furnace to melt and discharge the fusible mold, leaving a cavity.
Casting: Pour the metal preheated to the appropriate temperature into the cavity so that it fills the entire shell mold. The metal cools and solidifies to form a casting.
Knock or break the shell mold: After the metal solidifies, the casting is taken out by knocking or breaking the shell mold.
Cleaning and processing: Clean the residual material on the surface of the casting and perform necessary processing procedures such as trimming and polishing.
The advantages of shell casting include:
High precision: parts with complex shapes and rich details can be manufactured with high precision and surface quality.
Good dimensional stability: The dimensional stability of the parts is good and remains consistent in different batches of production.
High degree of automation: It can achieve high automation and improve production efficiency and consistency.
Reusable investment mold: The fusible mold can be reused to reduce the cost of mold preparation.
Applicable to a variety of metals: Applicable to a variety of metals such as steel, stainless steel, and alloys.
Of course, if you need investment casting metal parts, you can choose to cooperate with Mulan Metal. Mulan Metal has 12 years of metal casting experience, specializes in a variety of casting processes, and serves customers in more than 30 countries. Looking forward to your consultation.
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