What is Flaskless Sand Casting?

Flaskless molding/automated sand casting is a variation of sand casting or green sand molding that has been automated for speed, high volume output and repeatability. The process delivers the true economies of automatically mass produced sand castings, namely greater productivity, lower cost and high quality castings.

Precision Enterprises uses a Roberts Sinto FBO flaskless molding machine that enables us to greatly reduce mismatch problems and achieve a very high level of mold-to-mold consistency.

Is it Really Flaskless?

In spite of its name, flaskless molding does use flasks. A flask must be used on all sand molding for the containment of the sand while the sand is firmed about the pattern or match plate. However, in flaskless molding, the sand filled flask is rebuilt and used over and over in a totally mechanized and automated sand molding process.

Flaskless Molding Benefits

The benefits of flaskless molding are impressive and include uniformity, high density molds, high output of products, elimination of mold shift, and drastically reduced labor expense. Flaskless molding also provides a mold hardness that is consistent throughout the mold and offers rapid core setting, easy inspection of cores, utilization of existing tooling, high casting quality, reduced finishing time and quick pattern changes.

A flaskless molding machine operator can adjust the cope and drag heights and the total squeeze pressure to accommodate different mold densities and mold hardness to meet the demands of the specific molding application. The operator can also adjust the sand fill allowing the adjustment for variations in each pattern. It is possible to produce complex molds and molds with deep pockets, which are difficult with traditional, normal sand casting procedures.

Our new Roberts Sinto FBO flaskless molding machine reduces mismatch problems and achieves greater mold-to-mold consistency.

A line of molds, output from the FBO machine, are ready for casting, are being gravity fed with molten aluminum.