EXAIR Cold Gun Prevents Melting of Chocolate During Filling

With Valentine’s Day coming up in the U.S. many of us will be buying chocolates for our significant other. My wife (somehow) doesn’t particularly care for chocolate, so I buy some for her anyway knowing that it will sit around until I eat it. I think most of us would agree that chocolate is even more delicious when melted and drizzled all over the top of just about anything. But, melted chocolate isn’t always a good thing.

I recently worked with a company that manufactures chocolate products. They came out with a new line of small candies and were encountering an issue during packaging. In their process, the chocolates are formed, cooled, and packaged for resale. During the packaging process they were experiencing a problem that caused the chocolates to melt. The bags are heat-sealed along the sides and bottom. This heat was transferring from the bag to the chocolates and causing them to melt. Rather than having a finished package of individual candies, they were melting together to form one large lump. Not exactly what they are hoping to deliver to their consumers.

 

Video of the bag filling process

Fortunately, EXAIR offers a range of different products that are suitable for cooling. For this application, they utilized a Model 5330 High Power Dual Outlet Cold Gun. With the fan-type nozzle installed, they were able to cool both sides of the package immediately after sealing and just before filling the bags with chocolates.

EXAIR’s Cold Gun was a Product of the Year finalist in 2007. Using only a source of compressed air, the Cold Gun and High-Power Cold Gun produces a stream of clean, cold air 50° (28°C) below your compressed air supply temperature. The Cold Gun is very quiet at only 70dBA and has no moving parts to wear out. Just supply it with clean, dry compressed air and its maintenance free! It’s available as both a standard and High-Power option, providing 2x the cooling power. Each style is available with either a single or dual cold outlet flow.

The Cold Gun is pre-set to an 80% Cold Fraction. In other words, 80% of the compressed air supplied to it will exhaust from the cold end of the tube, 20% from the hot end. This prevents the Cold Gun from freezing up during use and optimizes the gun’s cooling capacity. The Cold Gun is an ideal alternative to messy and expensive coolant mist systems. It eliminates the cost of purchase and disposal of cutting fluids as well as worker related health problems from breathing airborne coolant or slipping on wet floors. Replacing a coolant-based system also eliminates the need for secondary cleaning operations after milling or drilling.

If you have an application that you believe would be better served by the use of an EXAIR Cold Gun, give us a call.

Tyler Daniel
Application Engineer
E-mail: TylerDaniel@EXAIR.com
Twitter: @EXAIR_TD

EXAIR’s Gen4 Power Supplies, the Foundation of Gen4 Static Eliminators

In the fall and winter seasons, the air becomes much drier. You may be familiar with the unpleasant shock you get from the door knob after walking across a carpeted surface. While this type of shock doesn’t generally cause any sort of problems, in many industrial processes this static electricity can cause a wide range of issues. These may manifest as nuisance shocks to an operator – similar to the door knob example, but it can also cause problems with the finish quality of coatings and paint. It will make ink jetted codes unreadable, cause blemishes in printing processes, and short out sensors being relied upon for counts and quality inspections…just to name a few. 

The reason that you experience static shocks more frequently during winter is due to the relative humidity. At colder temperatures air does not hold as much water as it does when it’s warm, and since water conducts electricity, higher humidity keeps static at lower levels. Even though you’re heating your house to a similar temperature, the air that is being drawn into your home and heated is still the dry cold air containing less moisture.

So how do we tackle this static problem that’s running rampant in your processes? EXAIR has a wide range of Static Eliminators available to ship same-day from stock. Each of which is designed to handle different types of applications. At the heart of these Static Eliminators is the EXAIR Power Supply. Available with either 2 or 4 ports, the Gen4 Power Supply is suitable for use with either 115V or 230V via the selector switch on the back. A 6’ modular power cord and lighted power switch are included. The modular cable protects sensitive electronics against electromagnetic interference while easing connections and routing. An integrated fuse (spare fuse is also included) on the primary protects against voltage spikes.

Model 7960 Gen4 Power Supply (top) has two ports; Model 7961 (bottom) has four, depending on how many Static Eliminators you wish to operate from the same Power Supply

Two shielded cables are included with both styles of Power Supply. A standard 3-prong outlet for North American customers, and another that allows you to install your own plug to accommodate any style of electrical outlet. The integrated ground connection on the high voltage side allows for complete connection using just the bayonet connector. A grounding post on the front-face of the Power Supply is available for bonding of the Power Supply to machine frames. Shunting circuitry designed into the Power Supply protects the user against any short circuit on the secondary side.

The Power Supply includes an integrated flange for easy mounting in any orientation. Rugged and durable stainless steel connections are present at the high voltage side vs the plastic connectors of the competition. This facilitates the integrated ground and shockless design of all of our Static Eliminator products. The Power Supply is both RoHS and CE compliant, as well as UR Listed.

Here at EXAIR we’ve helped customers in a wide range of industries solve their static issues within their processes. If you would like to discuss the best option for dealing with your static, give us a call. An Application Engineer is ready on the other line to help diagnose your issue and make a suitable recommendation.

Tyler Daniel
Application Engineer
E-mail: TylerDaniel@EXAIR.com
Twitter: @EXAIR_TD

Super Air Wipe Provides Long-Lasting Solution for Extrusion Blowoff Application

 

The Super Air Wipe has no moving parts to wear out requiring little to no maintenance when supplied with clean, dry compressed air. I recently spoke with a maintenance manager who worked for a company that had been using the same unit for over 7 years. In this application, the Super Air Wipe was used to remove a light coating of oil from the exterior of extruded shapes. Despite showing some obvious signs of wear and tear (and perhaps a little bit of residual oil from the environment), it was still serving the needs of the application as-is.

It may be dirty, but it is still working to remove a light coating of oil from an extrusion!

The Super Air Wipe is available in aluminum construction in sizes ranging from 3/8” – 11” in diameters. All Super Air Wipes comes with stainless steel hardware and stainless steel shims. Sizes up to 4” include a brass tee that supplies one half of the Super Air Wipe while a stainless steel wire braided hose supplies the other side. Sizes over 4” should be piped directly to each ¼ NPT compressed air inlet. In addition to aluminum construction, the Super Air Wipe is also available in 303 stainless steel for corrosive or high temperature applications. The Stainless Steel Super Air Wipe can withstand temperatures up to 800°F and is available in sizes from ½”-4” from stock.

Much like the Super Air Knife, the Super Air Wipe has ¼-20 tapped holes along the downstream side that can be used for mounting. Smaller Super Air Wipes can be supported by rigid compressed air pipe that is used to supply the air into the product. The Super Air Wipe is also infinitely adjustable through the use of shim sets or a pressure regulator. Kits will include the Super Air Wipe, shim set to make gross adjustments to the airflow, an auto-drain filter to keep the air clean and dry, and a pressure regulator. By adjusting the input supply pressure to the Super Air Wipe, you regulate both the force and flow that is projected onto the target material. Increasing the input supply pressure will increase both the force and flow from the Super Air Wipe.

If you’re processing any type of hose, wire, or extruded shapes that could benefit from installing a Super Air Wipe give us a call. With all sizes shipping from stock on an order received by 2:00 pm ET we can have one to you as early as tomorrow!

Tyler Daniel
Application Engineer
E-mail: TylerDaniel@exair.com
Twitter: @EXAIR_TD

Cooling Parts? Super Air Amplifiers May Be For You

Super Air Amplifier Family

When working with a cooling application, many customers will immediately look to the Vortex Tube and Spot Cooling product lines. While this may be the best solution for some applications, cold air is not always the best method that we have available for cooling. EXAIR’s Super Air Amplifiers are very effective at reducing the temperature of a part without requiring cold air, when the temperature differential between the Super Air Amplifier’s airflow and the temperature of the part is significant. Due to their ability to entrain large amounts of ambient air, we can move a lot of volume of air across the surface of the part and quickly lower the temperature.

I like to compare this to blowing on a hot cup of coffee just as it’s been brewed. The temperature of the air coming from your mouth is around 98.6°F, the same as your body temperature. Coffee can be as hot as 185°F when fresh. Due to the temperature differential between your breath and the hot coffee, we’re able to achieve a reasonable amount of cooling just by simply blowing across the surface. Typically, when the target temperature of the hot part or material needs to be around ambient temperature or higher, a Super Air Amplifier can be a good choice. 

While many applications utilize the outlet flow of the Super Air Amplifier to blow off, clean or cool a part or material, the ability of the Super Air Amplifier to entrain large amounts of ambient air can also be utilized to convey light materials or to draw in dust, smoke, or fumes from the surrounding environment. As the plugs on the exhaust side of the Super Air Amplifiers come in sizes of ¾”, 1-1/4”, 2”, 4”, and 8” the exhaust flow can be ducted with standard size hose.

EXAIR’s Super Air Amplifiers utilize a patented shim design to maintain critical positioning of component parts. This allows a precise amount of compressed air to be released at exact intervals toward the center of the Super Air Amplifier. This creates a constant, high velocity outlet flow across the entire cross-sectional area. Free, ambient air is entrained through the unit, resulting in high amplification ratios. The balanced outlet airflow minimizes wind shear to produce sound levels far lower than other similar air movers.

Patented Super Air Amplifier Shims

Super Air Amplifiers are supplied with a .003” thick shim that is ideal for most applications. Flow and force can be increased by replacing the shim with a thicker .006” or .009” shim. The flow of air is also controlled by adjusting the input pressure supplied to the amplifier. Higher pressures increase both the force and flow, while lower pressures decrease both force and flow. All Super Air Amplifiers are available in kits that come with a shim set as well as a suitably sized pressure regulator and auto-drain filter.

EXAIR has a solution for you if you need to move A LOT of air. Reach out to an Application Engineer today if you have an application that you believe could be served with a low-cost, simple solution!

Tyler Daniel
Application Engineer
E-mail: TylerDaniel@EXAIR.com
Twitter: @EXAIR_TD