Die casting machines — in a hot-chamber die casting machine, how is the melting pot arranged relative to the machine and shot system?

Introduction / Context:
Hot-chamber and cold-chamber die casting differ primarily in how molten metal is delivered to the shot chamber. Recognizing the configuration of the melting pot helps determine which alloys can be cast and what cycle times and contamination risks are expected.

Given Data / Assumptions:

• Hot-chamber machines typically cast low-melting, non-ferrous alloys (e.g., Zn, Mg, some Pb alloys).
• Cold-chamber machines are used for higher-melting alloys (e.g., Al, brass) where immersion of the shot system would cause erosion.
• Question asks specifically about the melting pot's arrangement in hot-chamber machines.

Concept / Approach:

In hot-chamber die casting, the shot cylinder/shot plunger and the gooseneck are immersed in a molten metal bath that is part of the machine—i.e., the melting pot is integral. Metal is drawn directly into the gooseneck and injected into the die each cycle, enabling very fast production rates. In contrast, cold-chamber machines ladle molten metal from a separate furnace into the shot sleeve each cycle.

Step-by-Step Solution:

Verification / Alternative check:

Manufacturer diagrams of hot-chamber machines show the crucible/gooseneck assembly within the machine body with the plunger operating below the bath surface.

Why Other Options Are Wrong:

Separate furnace applies to cold-chamber machines; “any location” is overly broad; “high temperature and pressure is used” is ambiguous and not distinctive to hot-chamber (both variants use pressure, and “high temperature” is relative).

Common Pitfalls:

Assuming all die casting uses a separate furnace; confusing alloy limitations with machine architecture.

Final Answer:

melting pot is an integral part of the machine