Qingdao Xiangmao Machinery Manufacturing Co., Ltd.
Three processes of sand casting
Upload Time:
Jan 20, 2024
There are many forms of sand casting processes, with the three main ones including sand shell molding, green sand casting, and the loss-in-weight method
According to the different sand used in the casting mold, sand casting is a common metal casting process, which can be divided into green sand casting, coated sand casting (shell casting), self-hardening sand casting and dry sand casting (lost foam), etc. kind of craft. Casting and vacuum casting. It uses a sand model as a mold for casting. There are many forms of sand casting processes, with the three main ones including sand shell molding, green sand casting, and the loss-in-weight method. The following is a brief introduction to these three sand casting processes:
1. Sand Shell Molding:
Sand shell molding is a common sand casting process, also known as sand shell casting or shell casting. Its main steps include:
Mold Preparation: The metal templates used to form the sand mold are called core boxes and core boxes.
Sand Shell Preparation: Green sand (usually green sand with some binder) is applied to the core box and the interior surface of the core box.
Sand mold assembly: The core box and the core box are combined to form a complete sand mold, and then vibration or other means are used to ensure that the surface of the sand mold is smooth.
Pouring: Molten metal is poured into a sand mold, filling the mold cavity and forming the final casting.
Cooling and Tapping: After casting, wait for the metal to cool, then tap the sand mold to break the shell and reveal the finished casting.
Green sand casting is a common, cost-effective sand casting process characterized by the use of green sand molds, which often contain a binder. Process steps include:
Sand Mold Preparation: Using green sand mold, fill green sand in core box and core box.
Mold Merger: Merge core boxes and core boxes to form a complete sand mold.
Pouring: Molten metal is poured into a sand mold to fill the mold cavity.
Cooling and Tapping: After casting, wait for the metal to cool, then tap the sand mold to break up the green sand to reveal the finished casting.
3. Investment Casting:
Loss-in-weight casting is a high-precision sand casting process suitable for manufacturing complex and precise parts. Steps include:
Pattern Preparation: Patterns used to form sand molds are usually made of wax or other meltable material.
Model coating: Coating multiple layers of ceramics on the surface of the model to form a ceramic shell.
Sintering: Bake the model so that the wax inside it melts and flows out, creating a cavity.
Pouring: Molten metal is poured into the ceramic shell, filling the cavity.
Cooling and Tapping: After casting, wait for the metal to cool and then tap the ceramic shell to reveal the finished casting.
Each of these three processes has its own characteristics and is suitable for different types of parts and production needs. Choosing the right process often depends on the shape, size and complexity of the part, as well as the accuracy required.
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