Food & Drink Process & Packaging Issue 21 2018 | Page 32

Powder Metering at ultra-low levels Bulk Solids dosing equipment for feed rates above one kilogram per hour are readily available. A few companies can offer flow or batch rates below 50 grams per hour however, for applications requiring true micro dosing at quantities below this, the equipment becomes difficult if not impossible to obtain. Trantec have been developing a micro dosing screw feeder capable of extremely low feed rates and unrivalled accuracy. Combining Trantec’s modern, in-house computer-controlled machine tools with their twenty plus years of experience producing Powder Metering Feeders, the “Nano” Feeder has gone from concept to working prototype in record time. Accurate feed rates below 5 grams per hour are now achievable. In-keeping with Trantec’s policy of continual development, the Nano Feeder is currently undergoing refinement and intensive product testing to iron out any manufacturing issues and improve production times, an important factor to keep the Nano Feeder competitively priced. Micro batch dosing presents numerous challenges which are simply not present on larger machines. The miniaturisation of the Nano Feeder’s components demands new techniques of manufacture and even tighter tolerances than usual. Careful design and experimentation have enabled us to create robust parts which can tolerate repeated handling in an industrial or laboratory environment. From the initial machine concept, Trantec utilised 3D modelling and high- resolution 3D printing to produce concept components. The 3D printed parts were assembled into a working prototype which allowed actual material trials on feed rates and accuracy. 32 FDPP - www.fdpp.co.uk Once proven, the design was further Our exclusive design ensures that enhanced to the highest specification wastage of expensive materials is kept to required by the Bulk Solids industry by a minimum, with very little residue being introducing pharmaceutical standards left in the feeder. to the build quality. Metal detectable blue silicone gaskets, PTFE dry running Complimenting the Nano Feeder’s shaft seals, dismantling without tools for mechanical capabilities, Trantec offer easy cleaning and autoclave compatible weigh control systems for both loss in components are now available as optional weight and gain in weight applications features. including Gravimetric type continual weight loss monitoring and correction. A typical Nano Feeder comprises a Nano Feeders can be mounted on a conditioning chamber within the feeder dedicated weigh unit which offers even body, complete with variable speed greater accuracy and control. rotating agitator and variable speed rotating Auger, which provide constant Selection of the correct Nano Feeder or intermittent feeding to suit the configuration is essential for achieving application requirements. The agitator optimum performance and accuracy. The manipulates the product to a uniform nature and characteristics of the product density to ensure consistent loading of is an important factor when choosing the the auger. size of the Auger Screw and configuration of the agitator. The agitator employs highly efficient contra rotating blades to break ‘bridges’ Trantec offer a free, comprehensive and ‘rat holes’ using technology borrowed product testing service to all our clients. from ribbon blade mixers. Upon completion of testing, we will provide you with a report, detailing our The product is then administered into findings and our recommendations an auger screw, which can be rotated for trouble-free feeding. Alternatively, at variable speeds, ensuring accurate customers can witness material trials metering at a constant volume of 1% to first-hand or request a video with your 2% typically. report. Modular in design, Trantec’s Nano- For more information feeders offer easy access to all parts for Tel: 01282 777566 or send your enquiry optimum cleaning and maintenance. to [email protected]