Pattern equipment — names of parts in a three-part moulding box When a pattern requires a three-part flask, which portion is called the “drag”?

Introduction / Context:
In sand moulding, the flask holds the sand and pattern during ramming and mould preparation. Knowing the standard names of flask sections allows clear communication between patternmakers and moulders, especially when complex parting lines require three sections.

Given Data / Assumptions:

• Three-part flask terminology: cope (top), cheek (middle), drag (bottom).
• The question asks specifically for “drag”.

Concept / Approach:
The drag is the lower section of the flask set on the moulding floor or bench first. The cheek is inserted between the cope and drag when the parting line is stepped or when features require additional separation. The cope is the uppermost section that is lifted off the assembly last during mould opening.

Step-by-Step Solution:
Recall standard naming: cope (top), cheek (middle), drag (bottom).Map “drag” to the bottom part.Select “bottom part”.

Verification / Alternative check:
Foundry textbooks and diagrams consistently label the three-part flask in this order; shop practice uses these exact terms.

Why Other Options Are Wrong:

• Middle part: that is the cheek.
• Top part: that is the cope.
• Cheek and cope together: not a single named portion.
• None of these: incorrect since a standard term exists.

Common Pitfalls:
Reversing cope and drag when viewing the mould upside-down; always reference the mould in its assembled orientation.

Final Answer:
bottom part