Stainless Steel Perforated Flasks

Perforated flasks hold the investment mold for chamber-style vacuum casting, where the holes along the wall let molten metal be drawn into the cavity from every direction rather than only from the sprue. Otto Frei builds these from 12-gauge stainless steel so they survive repeated burnout and quench cycles in a production casting shop.

The perforated wall is what separates these from solid-wall flasks: the vacuum acts on the mold through the sides, which helps fill thin sections and detail that a single downward pull can leave short. Seven sizes cover flask heights from 4″ to 8-1/2″ and diameters from 3-3/8″ to 5″.

Features

• Designed for chamber-style vacuum casting machines
• Perforated sides promote even metal flow into cavities from all directions
• Helps produce more complete, higher-quality castings
• Constructed from heavy-duty 12-gauge stainless steel
• Available in 7 sizes to accommodate a range of casting needs

Available Options

Compatibility

These flasks are made for chamber-style vacuum casting machines. Sizes are given as diameter by height, so match the flask to the chamber opening and the working height of the machine before ordering.