Differentiate between a pattern and casting.

A pattern is a template or model used to create multiple copies of a specific shape or design. It is typically made from materials such as wood, metal, or plastic and is used in manufacturing processes such as casting, molding, or machining.

Casting, on the other hand, is a manufacturing process in which a liquid material, such as molten metal or plastic, is poured into a mold or cavity created by a pattern. The material then solidifies and takes on the shape of the mold, resulting in a final product that is a replica of the pattern used. Casting is commonly used in the production of metal parts, jewelry, and sculptures.

Pattern

- A template or guide used to create a mold.
- Made of wood, metal, or plastic.
- Accurately represents the desired shape and dimensions of the final object.
- Reusable, allowing for multiple castings.
- Can be more complex and detailed than the casting.

Casting

- A process of creating a metal object by pouring molten metal into a mold.
- The mold is made from a pattern or directly from the original object.
- The molten metal fills the mold and takes the shape of the pattern.
- Once cooled, the metal solidifies into the desired shape.
- Typically mass-produced, with each casting being identical to the others.

Key Differences:

| Feature | Pattern | Casting |
|---|---|---|
| Purpose | Creates a mold | Fills a mold with molten metal |
| Material | Wood, metal, plastic | Metal |
| Complexity | Can be highly detailed | Usually less detailed |
| Reusability | Reusable | Not reusable |
| Production | Made before casting | Made during casting |
| Number of objects | Can produce multiple castings | Usually produces one casting at a time |