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CASTING - Coggle Diagram
CASTING
- Expendable Mould Casting.
- It's a method that utilizes single-use or temporary mold to produce the final casting, as the mold will be broken to get the cast product out.
ADVANTAGES
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Easy removal of castings: Since the mold can be expanded or broken away, it's easier to remove the casting without causing damage.
Shorter lead times: Since the molds are easier to create and modify, lead times for production are often shorter.
Suitable for low to medium production volumes: Expandable molds are ideal for smaller to medium-sized production runs.
DISADVANTAGES
Limited durability: Expandable molds are generally not suitable for high-volume production as they degrade over time and need to be replaced frequently.
Surface finish: The surface finish of castings produced through expandable molds might not be as smooth as those from permanent molds.
Material limitations: Certain materials may not be suitable for expandable mold casting due to the stresses involved in the expanding process.
- Nonexpendable/Permanent Mould Casting
- Uses a permanent mold that can be reused after each production cycle. Examples include; Pressure die casting, gravity die casting, centrifugal casting, and continuous casting.
ADVANTAGES
High durability: Permanent molds are typically made from durable materials like steel, which allows for high-volume production over an extended period.
Consistent quality: Since the mold remains unchanged through multiple casting cycles, it ensures consistent part dimensions and surface finish.
Better mechanical properties: Permanent mold casting often results in castings with better mechanical properties due to the controlled cooling process.
Cost-effective for high volumes: Once the mold is made, the cost per part decreases significantly for high-volume production runs.
Lower cycle time: Permanent mold casting usually has shorter cycle times compared to other casting methods.
DISADVANTAGES
Higher initial cost: The tooling costs for permanent molds are generally higher compared to expandable molds.
Limited design flexibility: Permanent molds are more suitable for simpler shapes and designs without intricate details.
Longer lead times for mold creation: The process of creating permanent molds can take longer, leading to longer lead times for production.
Difficulty in removing castings: Removing castings from permanent molds can be more challenging and may require additional processing steps.