Rotary Solutions from DIDION represent the most efficient and economical processing machinery in the industry. Didion customers have actually achieved payback in less than a week. How? Rotary is easier to install. Rotary is cheaper to run and maintain. Rotary is quieter and more environmentally friendly. And most of all , rotary systems offer superior performance in a large majority of applications. Think about it. We have the testimonials to prove it.
The list of rotary processing machinery DIDION designs and builds is impressive, just take a look below. Think of them all as Rotary Profit Centers. So for your next upgrade or expansion, all you have to do is think performance.
Rotary Sand / Casting Separators


Poured molds are delivered into the intake end of the rotary drum. As the molds tumble through the drum, the sand is separated from the casting, crushed to grain size, and dissipated through apertures in the lining to the outer chamber, where it is conveyed to the sand discharge point. The cleaned castings travel to the casting discharge end of the drum, where they exit and move to the next stage of processing in the cleaning room. The tumbling action in the DIDION crushes sand lumps, removes core butts, and empties sand pockets. The apertures in the patented lining act as a rotary screen to prevent tramp metal, core butts, and other foreign material from entering the sand system. Moreover, the sand is homogenized and uniform in temperature, since cooler sand from molds entering the DIDION is constantly mixed with hotter sand as it passes through the lining into the sand chamber. This allows for better sand control at the muller.


The DIDION is designed for use in any type of molding system-from conventional to automatic. The configuration of the lining is specifically designed for each installation in order to provide the most efficient separation of sand and castings, while minimizing excess tumbling of the castings. Standard sand discharge locations at either end of the unit provide easy installation into new or existing foundry systems. A custom-designed intermediate sand discharge (located at almost any point along the drum) will allow sand to be discharged onto existing sand return conveyors.
Rotary Media Drums
The Safe, Clean, & Efficient Alternative to Vibratory Shakeouts

Forget shakeouts, call them rollouts. The DIDION Rotary Media Drum® has revolutionized the whole vibratory shakeout process. Now in use in 55 countries, the patented dual chamber design of the machine accomplishes many tasks in one easy step.
  • First, it separates green sand from core sand and dramatically improves sand conditions.

  • Second, it screens the sand, eliminating the need to buy and maintain more equipment.

  • Third, it produces cleaner castings, greatly reducing shot blast time and reducing labor in the knockout and finishing departments.

  • Fourth, it cools the castings enough to handle with gloves.

  • And finally, it eliminates phone calls from irate neighbors claiming they just lost another family heirloom due to vibrations from your foundry.
The DIDION Rotary Media Drum® comes in ten standard sizes, or can be built specifically to your requirements. It is ideally suited for high speed, high pressure, flaskless molding systems. It can handle no-bake and shell molding and can clean brass, bronze, ductile, gray, malleable, and steel castings.
Installation is a breeze - no pits or special foundations. Its efficient design has proven to reduce maintenance costs for many customers and it reduces airborne silica dust from sand carryover for a cleaner, safer environment. It also eliminates stress problems and white caps in your coffee mug. So, next shut down or long weekend, remember... the only thing shaking in your foundry will be our competition. Forget shake, forget rattle, think roll.

Rotary Lump Crusher / Sand Reclaimers

Dealing with spent sand has always been a challenge for foundries, but with environmental regulations getting more stringent all the time, reclaiming one's sand is becoming much more critical to success than ever.
The DIDION Rotary Lump Crusher / Sand Reclaimer represents the most efficient and reliable foundry sand reclaimer in the industry. It is environmentally friendly and has the lowest operating cost, per ton, worldwide. It crushes, scrubs, separates, screens and classifies large mold lumps into reusable grain size sand while automatically discharging tramp metal and debris.
Standard models process lumps from 2 to 50 tons per hour either in batches or continuously and the versatile design allows sand to be discharged at either end. Custom machines can also be built to accommodate specific applications.
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The DIDION's extra heavy duty construction saves on maintenance and reduces downtime while its efficient design helps minimize utility costs and dust. Plus, since no operator is required, extra labor savings can be enjoyed. With an optional variable jet burner, one can even reclaim wet, outside and dump sand as well.
Installation is simple as the DIDION Lump Crusher / Sand Reclaimer requires no pits or special foundations.


Rotary Sand Screens

Without a doubt, the DIDION Rotary Sand Screen is the most economical, efficient and reliable machine on the market.
No other piece of equipment can blend, condition, and remove core butts and tramp metal from return sand in one easy step.

  • DIDION's revolutionary internal sand distribution system utilizes 100% of the screen area
  • Adapts to numerous feeding applications due to its unique open-end design.
  • Easy to maintain due to its extra heavy duty design and off-the-shelf components.
  • Easy to install - just set it down and turn it on - no special foundations required.
 
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Rotary Sand Blending / Cooling Drums

These machines blend, cool, condition, screen, and classify green return sand efficiently to improve the sand system and increase production. You'll reduce scrap and cleaning costs with lower sand temperature and superior sand conditioning. Integral sand screening eliminates down stream screening equipment. Low energy consumption, low CFM requirements, minimum installation time and low operating cost increases profitability. Machine sizes range from 25 to 750 tons per hour of green sand.
  • Reduces scrap and cleaning costs due to lower sand temperature and improved sand conditions.
  • Provides more uniform sand to muller, improving muller efficiency and consistency of sand conditions.
  • Rugged, durable construction requires minimum maintenance.
  • Open end design with no center shaft allows for easy loading by feeder or chute.
  • Simple, smooth drive system does not generate high frequency vibrations, thus eliminates the need for special foundations and large spare parts inventories.
  • Precision laser alignment of the main support bearings allows the drum to run level, thus eliminates thrust loads and minimizes wear.
  • Lifter bars and helical flights improve sand conditions by blending and mixing the sand.
  • Integral sand screen.
  • All drive components are standard, off-the-shelf items that are easily accessible.
  • Low horsepower, low CFM requirements, minimum installation requirements and low operating costs are cost saving features.
  • Easily adapted to programmed automatic control.



Rotary Dross / Slag Metal Reclaimers
Dross & Slag Metal Reclamation Systems

DIDION Rotary Dross / Slag Metal Reclaimers liberate and reclaim valuable metallics from large slag & dross chunks using a patented design. The machine features a Dynamically Isolated Articulated Concentric Crusher with serrated teeth that provides a positive action for reducing large chunks. The material is first screened in an aggressive attrition chamber through an extra heavy-duty cast alloyed wear-resistant liner which is two inches thick for long life. The material is tumbled again in the Star Chamber and then enters the final screening system where the slag & dross is separated and air classified from the reclaimed metal.



Rotary Sprue Crusher / Cleaners​​​​

High rotary tumble action crushes core butts and cleans the sand off gates, runners, and sprue. Melting efficiency is increased with clean and condensed melting stock. The sand is recovered and slag handling and disposal costs are greatly reduced as well. The machine eliminates shot blasting of the melt returns and can process large mold/core lumps. Additional savings include the elimination of the cleaning room bottleneck as well as the need for expensive jaw crushers.
DIDION Rotary Sprue Crusher / Cleaners require less energy, less maintenance on shot blast equipment, and install easily. By helping keep the sand in the sand system, the machines also significantly reduce clean up costs and keep one foundry much cleaner.
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