Jeff Hochadel

How to Properly Clean Fine Mesh Screens Without Damaging Your Equipment

Jeff Hochadel
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Over the years I have read many articles about how to reduce screen blinding on vibratory screeners. These solutions range from polyurethane balls to brushes. One of the most frequent questions I get asked is how to clean screens once they are blinded for fine mesh applications. Some customers simply throw out the blinded screens or send them back to our rescreening department for a fresh, new screen to be applied.

A screen does not necessarily have to be a very fine mesh in order to blind. We have seen screens with a mesh as coarse as a 2 or 3 mesh can easily blind due to product lodging in the openings while conveying across a screen deck. Of course, the larger the mesh opening the easier the screen is to clean. A fairly larger opening can simply be cleaned from the “bottom side” of the screen surface with a  simple soft wire or hard nylon brush. We have touched on this type of screen deblinding in previous blogs, you can click here to read more about solutions we suggest for these types of screening applications.

On finer wire mesh screens, let’s say 200 mesh and finer, a soft bristle brush may work but you risk tearing the screen surface or worse yet cutting a couple very fine wire mesh thus turning the 200 mesh opening into a much larger sized opening! If your screen frames are small (3”, 8”, 10”, 12”) Read More…

David Strong

3 Variables to Consider That Influence Material Flow from Vibratory Hopper Feeders

David Strong
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When it comes to vibratory equipment and end user requirements, Cleveland Vibrator has worked with customers that span the range from simply wanting to move material from point A to point B and they’re not terribly concerned with much more than that goal.  Other customers use vibratory equipment to provide bulk material to downstream processes and are looking for more precise control of the material flow.

Recently I had the opportunity to visit a local customer and assist him with setting up a recently completed hopper-feeder unit.  This customer’s goal was to place a dry material into plastic trays while the plastic trays moved on a conveyor belt under the vibratory feeder.  Precise metering of the dry material into the trays is critical to this customer’s success.  As I worked with this customer and our equipment it seemed to me that this would be an excellent basis for a discussion of material flow and what parameters impact the control of the flow. As mentioned the equipment provided by Cleveland Read More…

Glen Roberts

The Evolution of Industrial Vibrators: From Pneumatics to Electric Powered Vibrators in the 20th Century

Glen Roberts
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The Cleveland Vibrator Company started manufacturing air operated vibrators in 1923 and for several years air vibrators is all we pretty much offered. This worked well in our primary foundry customer base through the first half of the 20th century. As we expanded our customer base, we found more and more customers wanting to use electrical power to operate the industrial vibrators. It became obvious that we needed to give our sales staff an alternate source besides air to offer our valued customers.

88-mc-2-electromagnetic-continuous-duty-vibrator-aid-large-chain-of-bakery-plantsWe started with fairly basic electromagnetic vibrators with the MC-1, MC-2 etc. and started to introduce these units into the market place. The MC series is considered the “grandfather” to our current CM-5, CM-10 and CM-30 and more recent Super 30 vibrators. You can see a success story of this product in the field in the case study on the right hand side of this paragraph. In the early 60’s, we contracted with a company from Sweden called Dynapac to market and sell their rotary electric vibrators mostly here in North America. They were supplied in 1800 RPM and 3600 RPM (revolutions per minute) which opened the door to customers having hoppers, bins, chutes, bunkers as well as other applications which include vibratory tables, feeder and screeners. Read More…

Mike Stratis

Air Powered Vibratory Feeders: 3 Things To Know Before Making a Buying Decision

Mike Stratis
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When it comes to handling dry or semi dry bulk material, there are few means to transport the material from point A to point B. The common options are pneumatic conveying equipment, frequently dense or dilute phase, belt conveyors, screw augers or vibratory feeders, flat pan style or enclosed tube style. There certainly is a time and place for each of these options but we will focus on the vibratory feeder design.

Companies looking to make a buying decision on which type of equipment to install that will handle the material typically turn to the vibratory feeders that are powered by a pneumatic or air piston vibrator for one of or a combination of a few reasons:

cleveland-vibrator-vmsac-vibrator-group-shotAir Powered Feeders Work Well Within a Budget – First, and maybe most importantly, the purchase price. The air powered vibratory feeders can be the low cost alternative to the electromechanical or electromagnetic powered vibratory feeders. The biggest cost savings can come directly from the vibratory drive or mechanism and the vibratory controls. Electromechanical feeders typically have two vibratory motors while the electromagnetic feeders typically have one large vibratory drive attached. Each of these electric powered options require an electrical control box, with dual thermal overload protection for the electromechanical vibratory motors, for on/off operation, speed control or intensity of the vibration control. In contrast, the air powered feeders are driven by a single non-impacting piston, for example the Cleveland Vibrator VMSAC design, units and either controlled by a manual ball valve or 2-way, normally closed, solenoid valve. Read More…

Jack Steinbuch

Let’s Clear the Air on Vibratory Drives for Hazardous Locations

Jack Steinbuch
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Over the years I’ve received a number of requests for vibrators or vibratory equipment that need to operate in a hazardous location.  Most requests include the classifications they are either given or think they need, but often aren’t familiar enough with them to know what their application may really require.  I believe for vibrating motors especially, that most confusion stems from recognizing the difference between dust tight and explosion-proof construction.

Our challenge for these applications is to clarify the classification being requested and offer possible alternatives to meet them.  First, to my understanding, pneumatic powered drives are acceptable for any hazardous location. You only need to be concerned if you use an electric activated valve to start/stop it, to make sure it meets the classification of the hazardous area.

hazardous-environments-class-description-cleveland-vibratorThere is a considerable amount of data for classifications, but I referred to an article which I felt handled the topic in a very informative manner.  They started by defining the Class or type of material present as specified by NEC (National Electrical Code) and CEC (Canadian Electrical Code). Class I location is specified as a location containing flammable gases or vapors. Class II locations contain dust that is Read More…

Mike Stratis

Vibratory Compaction Tables: 5 Things to Consider When Working Within A Budget

Mike Stratis
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Are you looking to add a vibratory table to the manufacturing and/or shipping processes of your facility? If yes, great! We’d be glad to help put our experience to work and point you in the right direction. There are a few things to review during the buying process and each of these forks in the road can have an impact on overall cost of the equipment.

For starters, what can vibratory tables do? We commonly see the following reasons to include a table:

  1. Flatten the mound build up or pile of material made from the filling station discharging into center of the Gaylord, tote, box or similar type packaging container
  2. Compact and stabilize bulk bags, FIBCs or super sacks for easier stacking and handling prior to storage or shipment
  3. Fully or semi automate packaging lines by integrating with rollers sections (CDLR and gravity) or belt conveyors
  4. Fill, weigh and compact material
  5. Remove air bubbles in molds and casted products for improved structural and surface finish
  6. Lower labor hours and costs for packaging and processing lines

Read More…

David Strong

Unique Design Options Available for Specific Vibratory Compaction Table Applications

David Strong
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Recently on a long weekend I took the “Behind the Scenes Tour” of the C.F. Martin guitar factory in Nazareth, Pennsylvania.  During the tour the six of us in my group got to see pretty much the whole guitar building process from wood coming in the back door to final set up of the completed instrument.  Along the way we spent a few minutes talking with the guy that actually hand selects the wood for all the Custom Shop guitars, the customer works with a Martin guitar distributor, customizes an instrument and starts the process.  This gentleman reviews the order’s specifications and gets to look through Martin’s selection of some of the most beautiful wood you’d ever want to see to find just the right set to match up with the order.  Custom shop orders start with the basic guitar body style and build on from there, sort of like what Cleveland Vibrator does with its product line.  Cleveland Vibrator is very customer driven; the customer knows their business, process and goals, Cleveland Vibrator asks questions, listens, and often conducts testing, then offers a solution to accomplish those goals.  Similar to Martin Guitars on the “custom build your guitar” portion of their website, modifications to Cleveland Vibrators products is available.

FA Flat Deck Vibratory TableA good example of a product that is often modified by customer requirements is the vibratory table.  Basically a table is designed to vibrate linearly in the vertical direction.  From this very basic concept there are almost an infinite number of options and variables available to accomplish the customer’s goal, regardless of how simple or Read More…

Craig Macklin

What to Expect for Maintenance of Pneumatic Vibrators

Craig Macklin
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As my incredibly knowledgeable associate Mike Stratis just provided a posting about accessories to consider for your installation of a pneumatic vibrator, I thought I would provide a follow-up piece to discuss what to expect AFTER the install. As with any equipment, pneumatic vibrators and their supporting accessories do require some love, attention, lubrication and cleaning from time to time. Here is what to expect if you want to get the longest and most consistent life out of your pneumatic vibrator, whether a piston, turbine or ball.

Air Piston Vibrators 

Cleveland Vibrator Pneumatic Piston Vibrator Group ShotLubrication – First and foremost, check your lubricator with some frequency.  If you operate continuously, you might check and/or refill every 1-3 weeks.  If your use is intermittent or infrequent, you might schedule on a 1-4 months.  The use of internal coating in the vibrator can reduce or remove the need for lubrication.  But, coatings without the use of lubrication will typically wear out faster than a coated or uncoated piston vibrator that is properly lubricated.  Depending on size and duty cycle of your vibrator, you might use a pint of lubricant (we recommend our MXR-12 VibraLube, which is 10W-NR) every 2 weeks to 2 years. Read More…

Mike Stratis

What Are the Costs Associated with Installing Pneumatic Vibrators?

Mike Stratis
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When it comes time to review solutions to the material flow problems inside the hopper, pipe or chute, there are a few things to keep in mind when putting together a budget for the project. Besides the vibratory flow aid itself, there are additional components required before installing the unit. We will discuss these items and estimated costs to acquiring these components. Here is the short list:

  1. Industrial Vibrator – pneumatic piston vibrator, single impact air knocker, pneumatic turbine vibrator, pneumatic ball vibrator
  2. Safety cable
  3. Mounting channel or plate
  4. Hose to connect vibrator to on/off valve
  5. On/off valve
  6. Hose to connect on/off valve to air prep component (filter/regulator or filter/regulator/lubricator)
  7. Lubricant (if necessary)

Depending on the size of the hopper or piece of equipment that the pneumatic vibrator is going to be installed on, the price of the vibrator itself can range from about $100 to as much as $10,000. But, within that range, vast majority of the units are going to be between $100-$1000. Read More…

David Strong

Vibrator Coating Testing Results: Only Time Will Tell

David Strong
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Some time back in the mid-60s Cleveland Vibrator started working with coating technology in an effort to improve the performance and longevity of our line of pneumatic piston vibrators.  For best operation while consuming a minimum of compressed air, the piston and the body of any pneumatic piston vibrator need to be very closely matched.  Clearance between the moving piston and the fixed body is very fine, in certain installation orientations the piston rides on the body of the vibrator creating a metal on metal contact area.  Because of the metal on metal contact it is recommended to supply a pneumatic piston vibrator with lubricated air.  The appropriate amount of oil mist in the air stream will lubricate the moving parts, reducing the co-efficient of friction between the surfaces and extend the life of the vibrator.

Cleveland Vibrator’s investigation into and early use of friction reducing coatings was designed to leverage the benefits of the coating to enhance the performance and extend the life of the vibrator by reducing parts wear due to friction.  If not properly maintained and lubricated a piston vibrator will start to wear due to the piston/body surface contact.  Indicators of excessive wear will be reduced performance, less force output and more air consumed at the same operating pressure.  As the piston and body wear over time the gap between the two parts will increase, with the larger spacing air can “blow by” the piston, blow by air isn’t effectively used by the vibrator to generate force it simply exhausts out of the body.  Read More…

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