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By Bob Sperber, Plant Operations Editor | 03/08/2011
"It's the inertia of the product and its frictional characteristics that allow it to be conveyed in that fashion," says Steve Johnson, product marketing manager. He compares the technique to the "magic trick" of yanking the tablecloth from the dinner table without disturbing the dishes.
The gentle, sliding motion of a horizontal-motion conveyor might be ideal for moving raisins, granola, nuts and grains along in a granola blend without risking that the parts will separate. "This gives you strong assurance that within any given package, you're going to get very accurate results in a blended product," Johnson says.
Vibratory conveyors, in contrast, can be used for just that – separation and grading. Additionally, vibration, not horizontal sliding, would be more appropriate for conveying a honey-coated cereal that would otherwise stick to a conveyor surface.
There are of course many conveyance methods and vendors. Another one specializing in gentle, accurate handling of bulk wet and dry foods notes, "You can't afford to break materials – we hear this from everyone we're working with," says Karl Seidel, marketing manager at Cablevey Conveyors, Oskaloosa, Iowa.
The company's tubular drag conveyors use a closed-pipe design with internal flights to pull product along while also retaining accuracy in mixes. Being enclosed keeps foreign matter out – that's a big food safety advantage over open conveyors -- and accommodates clean-in-place, as well.
"Sanitary [processing] is no longer an option," Seidel continues. "Current trends indicate that if you're a food processor you need to pay attention to what's going on or you'll be investigated." And oversight will only get tougher in the months and years ahead, he adds.
Integration is an area where equipment manufacturers pick up the slack for dwindling in-house engineering staff. Services can range from turnkey management of control systems on a line to informal solutions.
For example, the story of the Reiser's IQF breakfast burrito didn't end with the installation of the double-screw egg depositor. It was so popular that the vendor didn't just sell a bunch – it did some extra engineering to mate the depositor to machinery from Solbern (www.solbern.com), whose dough folders are popular for Mexican tortillas, Asian rolls, Jewish-style blintzes and the like. "It's not a formal partnership, but we worked with them to develop depositing systems to work with their folders at our customers' sites," McIsaac says.
At the other, more formal end of the "services" spectrum, vendors offer all manner of assistance when a food plant is adding or automating a line.
Key Technology unveiled its Integrated Systems Group (ISG) late last year as "a response to customer requests to provide more integrated solutions for them," Johnson notes. The scope of service includes Key's sorting, conveying and processing systems as well as outside mechanical and automation suppliers.
Additional services include online training and even remote, web-based diagnostics and monitoring of equipment installed at its customers' plants. This allows Key tech-staffers to monitor equipment "and provide that information back to the user to tell them how well their machinery – our machinery – is performing. That's one way we try to assist their in-house maintenance effort over the long haul."
Ross & Son's Banaszek sees small, specialty food companies facing growing pains as they seeking a switch from contract manufacturing to in-house blending. At first, she says, "They turn to us to rent or purchase a blender," then "a matter of weeks or months later, many respond to successful trials and increasing demand by coming back for larger units," which has driven the company to expand its blender stocking program.
Summing up how consumer trends drive processor and ultimately vendor requirements, Vin Faherty, product manager for Harpak-ULMA Packaging, Taunton, Mass., says convenience demands have his customers "looking for more convenience in packaging" adding environmental concerns and nutrition and labeling information as key areas where solutions are needed. Within the next few years, he says breakfast foods will continue trending toward "healthier more nutritious meals, quick and easy convenience [and] portability." Additionally, he sees advances with cook-in microwavable packaging and "packages that are easy to open and convenient for storage."
Adding to Faherty's predictions, Heidi Harfinger, vice president of marketing for Harpak-ULMA, sees processors focusing to meet challenges on several front to reduce costs and increase efficiency. "The emphasis is on driving costs down by managing down time due to changeovers, run outs and equipment failures," she says, noting that plants continue to enlist vendors' expertise to help improve their processes.