Our Forge & Foundry Blog Series continues with an overview of our shot blasting machines most frequently used on these specific types of work pieces.
It is important to understand your work piece and process requirements including whether components will be processed continuously or in batches. When it comes to finishing forgings, non-sand castings, and powdered metal components, our shot blasting machines are divided into three categories based on how the work pieces are fed into the machine: continuous, batch, and specially engineered shot blasting machines.
Continuous Shot Blasting Machines
RMBD Continuous Tumble Belt Machine
The high-capacity, continuous feed RMBD is available in a heavy-duty version for large forgings and castings, which is equipped with 6 x 40 HP turbines, a steel-slatted work piece transport belt, and a magnetic separator.
With extensive experience in the forge and foundry industries, Rosler Metal Finishing understands that no two shot blasting processes and work pieces are alike. With that in mind, we continue our Forge & Foundry Blog Series with an overview of our machines offering excellent finishing for sand castings.
If you demand precise, repeatable results when shot blasting sand castings, consider the following machines. As always, the experts at Rosler are also available to develop a customized machine to accommodate your unique work pieces and challenges.
RMBD Continuous Tumble Belt Machine
The high-capacity, continuous feed RMBD is available in a heavy-duty version for foundry applications equipped with 6 x 40 HP turbines, a steel-slatted work piece transport belt, and a magnetic separator.
Building upon the information shared in our last Forge and Foundry Series post about sand casting, we now turn to the process of selecting and designing machines to specific sand casting operations.
Selecting the right shot blasting machine for your process and work piece means understanding how the work pieces and machine will interact. Here are common questions Rosler Metal Finishing receives when developing perfectly specified solutions for sand casting.
How do work piece
delicacy, size, and weight influence the machine choice?
Before choosing a machine, the following questions
must be asked:
Are the parts sturdy, allowing for aggressive processing, or must they be handled gently, without any part-on-part contact?
Is batch processing possible or must it be continuous?
Which work piece handling system is best: rotary drum, troughed belt, wire mesh belt, overhead monorail system, or heavy-duty crane or trolley on rails for extremely heavy work pieces weighing several tons?
Can the work pieces be handled by robot or is a custom-engineered shot blast system the best solution?
It is extremely important to find a supplier that
can offer a machine that is perfectly matched to the work piece
Our Forge and Foundry Series continues with a deeper look at sand castings. While more than 60 percent of all metal castings are made with a sand casting process, the specific shot blasting machines used to remove surface contaminants vary. Rosler Metal Finishing is uniquely qualified to identify the right shot blasting machine for your process and can help determine what settings and media will produce the best results with every cycle.
Sand Casting Basics
Sand casting, also known as sand molded casting,
is a metal casting process using different kinds of sand as mold material. The
sand is usually “glued” together with a bonding agent like clay, water, oil,
resin, or sodium silicate.
A sand mold consists of two or more sections.
Liquid metal is poured into the cavities formed by the mold.
Once cooled, sand molds pass through a shakeout
device, where they are destroyed to extract the metal castings. The raw
castings then undergo a fettling procedure, where sprews, gates, runners, and
risers are separated, and coarse burs are removed.