New Spiral Chutes from Dorner Provide a Gentle ...

Gravity has never been more useful!

View Details

The new Spiral Chutes from Dorner are an economical way to gently move product down to a lower level&#;with gravity doing all the work.

As product enters the Spiral Chute, gravity takes over to safely slide packages down to the lower level. Spiral Chutes&#; patent-pending stair step design ensures products won&#;t get stuck or jammed when being lowered from overhead conveyors, mezzanines or platforms. Even if packages begin to accumulate as they travel down, the Spiral Chutes&#; design is self-clearing to prevent jams.

Spiral Chutes are ideal for light weight products with a variety of package types, including cardboard, pouches, flexible packaging, corrugated boxes and others. The stair step design allows for different sized packages (lengths as short as 3&#;; weights between one ounce to 50 lbs.) to be lowered at the same time for added flexibility.

Features and benefits of the new Spiral Chutes include:

&#; Two construction options:
o Galvanized Steel with plated fasteners
o #4 Polish 300 Series Stainless Steel with stainless fasteners
&#; Ships assembled for fast and simple installation
&#; Custom infeed and exit chute locations and heights
&#; Clockwise or counter clockwise floor direction
&#; UHMW bottom liner and side wall liner
&#; Tubular steel or stainless-steel stand options

Size Specifications
&#; Chute widths: 8&#;, 12&#;, 18&#; and 24&#;
&#; Wall heights: 4&#; &#; 12&#; (depending on chute width)
&#; Inside radius: 5&#;, 10&#; or 20&#; (depending on chute width)
&#; Maximum infeed height: 144&#;
&#; Minimum discharge height: 18&#;
&#; Infeed and outfeed straight chute lengths:
o Minimum length: 0&#;
o Maximum length: 24&#;

&#; Spiral angles:
o Minimum angle: 90°
o Angle increments: 90°
o Maximum angle: 450°
&#; Angle of decline:
o Minimum angle: 16°
o Maximum angle: 20°

Dorner

When designing and purchasing a spiral gravity chute, several interacting factors goes into the design of them. These design factors include flow rate, pitch, diameter, material, intended use, and environment. How do you choose the correct spiral gravity let down chute for your product? You test it. And, you test it again. Testing on spiral gravity chutes is very important because all products flow down differently. So come to Astro and experiment on our three samples, here at Astro in Hanover, MN. We would love to assist you in the right design because we care!

• 18&#; outside diameter

• 30&#; outside diameter

• 54&#; outside diameter

Testing the Flow Rate, Pitch and Diameter

It is important to know what flow rate you are trying to achieve. This is in order to design a spiral that can achieve it. Therefore, how your product behaves sliding down the chute is the biggest influence to take into account. The whole system is designed around this key element. The required pitch must be finessed to achieve the desired amount of flow that is needed, given the diameter of the chute.  The flow rate is the function of the width, and the pitch you can get on it.

The right pitch is needed for your product to flow faster, but at a safe speed for minimal breakage of the items. This pitch has much to do with how a flight is stretched. The more you stretch it, the more you get a larger pitch.  However, there is a limit to how much a given size flight can stretch.

For more information, please visit Keefam.

Spiral Gravity Chute Material

Our spiral chutes are made with either stainless steel or mild steel. It depends on the intended use and environmental factors, of course.  Do you require food grade vs non-food grade material? Plus, consider temperature and atmosphere when choosing the material and finish.

Common Products to Test on Spiral Gravity Chutes

• Raw and roasted coffee beans
• Peanuts, cashews, nuts & seeds
• Fertilizer
• Packages
• Snacks & candy
• Crackers & cookies
• Dry pasta
• Cereals
• Grains
• Frozen prepared foods, i.e. frozen burgers
• Pet food & animal treats
• Airport baggage handling
• Parcel handling

Collaborative Design on Chutes

Designing spirals is not an exact science. That&#;s why we&#;re here to assist you. All our spiral chutes are customized and fitted precisely to each unique environment and specification. Our team collaborates with our customers on design, fabrication, and implementation. Plus, there are virtually no limitations on the length of our spirals.  However, maximum length of a spiral chute in &#;one piece&#; is 40&#;.

About Astro

It is important to work with experienced designers and fabricators, indeed. We have been manufacturing food processing equipment for over 30 years. Therefore, we have in-house capabilities for development, design, testing, and full fabrication. So call today to make an appointment to test your products!

Download Brochure

Contact us to discuss your requirements of Gravity Spiral Chute. Our experienced sales team can help you identify the options that best suit your needs.