Please visit: Dri-Air Industries, Inc.
16 Thompson Rd.
PO Box 1020
E Windsor, CT 06088-1020 US
Desiccant Dryers Still the Gold Standard
Desiccant Dryers Still the Gold Standard
Patented, high performance dryer, hopper and optional loading systems. DRI-AIR’s PD Series eliminates press/extruder mounted drying hoppers for fast, safe material changes.
1 dryer, 2 hoppers, and 3 reasons why the H-PDII systems provide maximum flexibility: * Drying and processing from one hopper while pre-drying in the other; on-the-fly material changes eliminates downtime. * Co-injection and/or co-extrusion processes; run two materials at two different temperatures simultaneously. * Reduce valuable floor space; eliminate the need for a second dryer by positioning the portable system between two presses/extruders.
Multiple Hoppers with One Dryer * One dryer connects to multiple hoppers for a centralized drying system. * Dry different materials at each hopper as each has its own booster heater for temperature control. * Processors making one or two materials changes daily can justify the cost of a hopper bank in months.
Since 1974 Dri-Air has been the industry leader in proven desiccant dryer technology, offering the highest quality at competitive pricing. Our constant attention to detail and incredible response time has helped us sell thousands of drying systems worldwide. From 1 pound to 800 pounds per hour, we offer solutions to a wide range of industries from simple solutions to complex custom applications.
Desiccant dryers and drying systems with throughputs from 1 to 1000 lbs/hr. Arid-X dryer series is an industry standard dual desiccant-bed dryer that supplies a continuous -40 F dewpoint. HP4-X series offers a high-performance four-bed dryer that can achieve -100 F dewpoints. Both series include automatic regeneration. Arid-X and HP4-X series available in press-mounted, beside-the-press and portable models with one or two hoppers. Portable system features optional closed-loop loading system that includes single bag filter, controls and blower integrated on a common castered floor frame. Press-mounted hoppers are eliminated and replaced with a small, filterless receiver. Dual-hopper systems suitable for quick material changes and on-the-fly processing. Off-the-press drying/blending systems for virgin, regrind and colorants. Designed for quick changes and on-the-fly ratio changes. Placement of augers under hoppers eliminates hoppers full of premix. Microprocessor control features Safe-Temp regeneration (temperature based) as well as dewpoint and time based. Built-in -49 F dewpoint monitor and automatic seven-day timer. Also has capability for Ethernet connections for machine communication. CA series compressed-air membrane dryers are for smaller machines with drying hoppers from 1/2 to 60 pounds. Hopper mount, floor mount and multple hopper bank systems for fast material changes are available.
Dri-Air Industries has upgraded their volumetric blending system for their PDII dryer. Both feeders are mounted on load cells to monitor and record the actual amount of each material used. A unique algorithm for the PLC was developed to maintain the exact ratio between the different materials. In use, the feeder is automatically filled to a preset amount by opening a gate under the drying hopper. The actual amount of material in the feeder is recorded and compared to the amount left in the feeder after dispensing into the common conveying stream.
This system yields a more accurate ratio from a shot-to-shot basis than other designs by eliminating the mixing chamber. Ratios can be programmed into the touch screen from 1 to 50 percent for processing colorant or regrind. The feeders are easily removed from the dryer for cleaning.
To find out more on the line of gravimetric dryer/blenders, contact Dri-Air Industries: 860-627-5110 or on the web: www.dri-air.com
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Dri-Air Industries has developed a new line of precision hopper mounted dryers - using plant air to dry the material. The hopper mounted compressed air dryers are compact and easy to use. These systems free up floor space and are available for process rates up to 15 lbs/hr.
From 2 pellets to 15 pounds per hour, with drying temperatures from 90 - 350 degrees °F, these new dryers can handle a diverse range of conditions without the hassles of conventional dryers that require cooling water or after coolers. To assure the resin is properly dried, Dri-Air’s Dri-Pak membrane provides the drying process a continuous stream of –49 °F dew point air regardless of the conditions.
The micro line is available in a wide assortment of configurations: from compact all-in-one drying systems that can fit on small extruders or molding machines, to separate systems with 2 oz hoppers and stand alone dryer packages. These low maintenance systems have a simple easy-to-use trouble free design with no moving parts.
Dri-Air’s popular UDC controller is standard, with the Advanced, ADC controller as an available option. The ADC control includes a –49 °F dew point monitor, 7-day timer, and temperature set back to prevent over drying. Both the UDC and ADC controller are easily calibrated for ISO 9000 and 9002.
To find out more how these line of dryers can help you with your process, contact Dri-Air Industries: 860-627-5110 or on the web: www.dri-air.com
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Sinicon Plastics, a world-class custom Injection Molder was founded in 1968 in Pittsfield Massachusetts. Sinicon Plastics specializes in molding engineering resins and liquid silicone for medical, military, aerospace and industrial applications. They offer horizontal/vertical insert molding, micromolding, cleanroon molding, overmolding, secondary machining, assembly and in-house tool building. Production volumes range from prototype to 100,000’s of parts.
They have a dedicated staff, many with over 20 years in the industry, with a focus on providing superior customer service and successfully taking on the most demanding of projects.
In 2010 the company relocated to a newer and larger facility in Dalton, MA (located next to Pittsfield) that more than doubled their space. They renovated the 35,000 square foot building and created a state of the art molding facility that now includes in-house tool building.
The move provided the opportunity for the company to investigate energy savings initiatives and ways to reduce their energy consumption. Focusing on two key areas, resin drying and factory lighting, the company has taken significant measures that have allowed them to keep their electric costs in the new building equal to that of their previous smaller space.
“After we purchased all new energy efficient dryers from Dri-Air and retrofitted more efficient lighting we haven’t seen any increase in our electric bill – although we have doubled in size in our new space,” said David Allen, President of Sinicon.
With this move to the new facility, Sinicon Plastics implemented a more energy efficient plastic drying system using today’s latest drying technology from Dri-Air Industries. “Resin drying is a major component of our energy costs,” adds Allen. “We had a few Dri-Air dryers in house and had been very happy with their performance. But when Dri-Air came to our plant and performed an energy audit for us – showing the benefits of fully converting to their drying systems - it was an easy decision to switch over completely our drying capabilities. The Dri-Air systems have saved us significantly with our energy costs, has improved the quality of resin drying, and reduced the labor associated with our resin drying function.”
New Dri-Air Drying System Uses Half the Energy Of Tray Ovens
Sinicon previously used tray ovens for all their resin drying – with three 10-tray units equipped with timers. The process used to dry material consisted of placing the un-dried material on trays in the ovens where heated ambient air bakes the moisture out of the material. This process takes a considerable amount of time as the ambient air is not dried, nor is the air circulated through the oven – it is more of a convection process than the circulation of the air through the material. Other factors that resulted in extended drying times included the use of solid trays where the air cannot circulate through the material, and the inability to have different temperatures in the oven for different materials. Additionally, labor is required to move the resin from the oven trays to the molding machines. Moving these resins within the trays can lead to contamination issues where one type of resin falls into another - which causes rejects and increases costs.
“The new dryers supplied by Dri-Air use half the amount of energy compared to the tray ovens. With these ovens we were forced to dry different resins all at the same temperature. We would leave the resin in them overnight to dry so that by morning we had resin suitable for production,” said Mr. Allen. “We found with the Dri-Air desiccant bed dryers we cut countless hours of drying out of our process. It dried the resin faster and better and we can customize the drying parameters to accommodate the resin it is drying. The portable dryers also included conveying equipment that moves the resin right into the small receivers on the press – eliminating the need to us to manually move it. The timers allow us to start drying the resin late at night so that each morning we are ready for production.”
Net results of the ovens inefficiency translates to:
Sinicon’s new drying system consists of individual portable desiccant dryers that enable them to dry material at the correct drying temperature for fast, efficient drying using desiccated (dry) air. This air is forced through the resin through the use of a blower, with the heated, dry air dispersed through the material by a properly designed hopper that holds the material. These dryers also convey the material directly to the press, eliminating the need for any additional labor to transport the resin and any contamination from moisture.
Dri-Air dryer efficiencies include:
· 50% reduction in energy consumption
Taking Advantage of Energy Program Rebates
Sinicon Plastics also received a check that subsidized 50% of their dryer purchase from the Western MA Electric Company in the amount of $30,000. “This funding comes from the conservation surcharge that the energy companies use to fund the promotion of energy consumption savings measures. It’s a fantastic program and we were glad to be able to take advantage of it,” said Mr. Allen.
Bob Dvorchik, the Supervisor of Commercial & Industrial Energy Conservation Programs at WMECO, located in Pittsfield, MA adds, “This program offers companies in Western MA an incredible opportunity to examine and reduce their energy consumption by significantly reducing the cost of implementing new energy savings measures. When companies examine their ROI on energy savings investments such as more efficient dryers, they are finding it just makes sense to do it.”
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Auxiliary equipment takes in a broad range of functions, from materials preparation to post-mold finishing.
Yes there are still molders drying with tray ovens. But this processor replaced the last few it had and has reaped some impressive energy-savings benefits.
There will be an extraordinary range of new auxiliary equipment on display at the show.
Portable material drying by truck is the concept behind an initiative launched last month by Poly Clean USA LLC, Charleston, S.C., with Dri-Air Industries.
By focusing on high-tech, quick-turnaround, turnkey solutions, Putnam Plastics has grown into a leader in the field of medical extrusion.
At least 16 companies introduced new dryers at the big show in Chicago. The new models span a range of drying technologies, but most sport features that save space and cost and make the dryers simpler and more reliable.
Visitors to the recent NPE 2009 show in Chicago were looking for materials handling equipment that could do more than dry, blend, or convey resins. It had to do those things while saving energy, providing faster and easier maintenance, speeding product changeovers, reducing labor cost, minimizing waste, and providing better value for money. The new products cited below addressed those needs and more.
The recent NPE 2009 show in Chicago saw the debut of dozens of new and enhanced robots for injection molding. The vast majority of the new models were all-servo types, though some economized by mixing servo and pneumatic axes. These new robots emphasized higher speeds, heavier payload capacity, longer reach, and more intelligent controllers that make programming and troubleshooting easier than ever. Telescoping arms and dual arms were very common among the new entries, as well.
Addressing the need for tighter cost control, several firms will offer new devices for energy monitoring.
All-servo, three-axis traversing robots from Sytrama in Italy are newly available in the Americas from Dri-Air Industries, Inc., E.
A new energy-efficient drying hopper from Dri-Air Industries Inc., East Windsor, Conn., features a non-conductive plastic outer cover that reportedly provides some heat insulation.
Is one type of resin dryer faster or more energy-efficient than another? That question prompts competing claims from suppliers—but very little concrete data. When one vendor performed controlled tests to get some answers, its results, published here for the first time, prompted further debate about the difficulties of making valid comparisons and the many complex issues involved in dryer selection.
Compressed-air membrane dryers are now available in a multi-hopper bank so that different materials can be dried at different temperatures.
A multiple-hopper drying system is said to be the first compressed-air unit that can simultaneously dry different materials at different temperatures.
NPE 2006 held no revolutionary changes in dryers, blenders, feeders, loaders, or conveying controls, but widely adopted improvements make the newest models easier to use and maintain—and easier on the budget, too.
Dryers, feeders, blenders, loaders, metal detectors, level sensors, mechanical and pneumatic conveyors, silos, bins, pumps, filters, valves, box fillers, bag dumpers, and materials-handling control systems constitute one of the biggest categories of products on display at NPE.
Injection MoldingSimplified Hot Runners Save Time & CostA new lower-cost hot-runner alternative to valve gating is suited to less critical cosmetic applications where users need predictable and reliable gate opening but not sequential gate operation.
Processors today face bewildering choices of at least five basic types of dryers, whose capabilities are subject to conflicting claims from equipment suppliers. For the buyer, the most basic questions are: How much drying is needed for the job and which dryer types are up to the task?
The big show in Chicago presented more new loaders, feeders, blenders, and conveying controls than you could count. They’re more flexible, easier to maintain, and easier to control. Many are web-enabled, and some are lower in cost.
Auxiliary equipment is shrinking to catch up with a growing market for small precision parts. Dryers, loaders, blenders, grinders, and chillers have all dropped in size for accuracy and fast product changeovers.