"Sand shell molding machine" may refer to a piece of equipment in sand casting. Sand casting is a common metal casting process in which sand molds are used to create metal castings. Sand shell molding machine is the equipment used to make these sand molds.

Sand shell forming machines play a key role in this process as they are able to prepare sand molds in an efficient manner to meet specific casting needs. These machines may use different technologies and designs, including automated systems, to improve production efficiency and mold quality. The choice of sand shell forming machine usually depends on the size, shape and production needs of the casting.

1. Design and mold preparation:
Part design: First, the designer of a car engine part will design a three-dimensional model of the part. This model will become the basis for preparing the mold.
Preparation of molds: Sand shell forming machine is used to prepare sand moulds. According to the part design, the sand shell molding machine prepares sand molds of a certain size and shape to ensure the accuracy and quality of the parts.
2. Core preparation:
Internal structure design: Some automotive engine parts may require internal cavities or channels. In this case, a sand core needs to be prepared to ensure that the casting has the required internal structure.
Sand core preparation: The sand shell forming machine can also be used to prepare sand cores to meet the requirements of the internal structure of the part.
3. Sand casting:
Material preparation: Before the casting process can begin, a metal alloy suitable for the specific engine part needs to be prepared, usually iron, aluminum or magnesium.
Pouring process: In the sand mold, molten metal is injected through the pouring process to fill the cavity of the sand mold and form the shape of the automobile engine part.
4. Cool and get rid of the mold:
Cooling: Once the metal has solidified sufficiently, you need to wait for the part to cool down to ensure that its structure is stable.
Get rid of the mold: After cooling is completed, the sand mold and sand core are freed through a sand shell molding machine or other tools to expose the final engine parts.
5. Subsequent processing:
Removal of residual material: After casting, the part may have some residual material or sprues that need to be removed, usually by cutting or other machining methods.
Surface Treatment: Some engine parts require surface treatment such as grinding, painting, or other coatings to improve appearance and corrosion resistance.
6. Quality control:
Inspection and Testing: During the manufacturing process, many inspections and tests are performed to ensure that the part meets the design requirements and has the required strength and durability.
By using a sand shell former, the process of manufacturing automotive engine parts can be efficient, precise and relatively cost-effective. This casting method is widely used in the automotive manufacturing industry and provides a reliable process for producing high-performance engine parts.