Identification

Maintain the weight

Avoid damage of pattern

Avoid weaken the strength

Treat the particular surface

Improve the weight

Improve the strength

Improve the working qualities

Core in irregular shape

Core in rectangular shape

Core in concave shape

Core in convex shape

According to shape and size

Pattern allowance

Structure of pattern

Production of casting

Prepare the pattern single piece

Prepare the pattern more than three pieces

Prepare the pattern more than four pieces

Prepare the pattern in more than two pieces