For plant managers, engineers and production supervisors in the food processing industry looking for an edge over the competition, reconsidering how a standard business practice is done — like using traditional wire belting for breaded or battered food items — can produce multiple benefits.
In this case, food processing industry professionals can actually add a surprising amount of production line reliability, longevity and, yes — profitability — in this way.
To examine the benefits of implementing conveyor wire belting that can withstand the rigors of the process, this article will review the benefits of this approach. It will explore the challenge, solution and results involved by utilizing “shaped” wire to increase strength and decrease stretch while allowing more coating to fall through for reuse.
Challenge: Food processing wire belt prematurely fails and needs to be replaced when it gets plugged up with breading or batter and is stretched.
Solution: “Shaped” wire belt is engineered to enhance strength and decrease stretch so it lasts up to eight times longer, while allowing more coating to fall through for reuse.
Results: The approach enables substantially less wire belt changeout and production downtime. In addition, it allows more coating reuse to further increase profitability.
Food processors of poultry, pork, seafood, vegetables and cheese products that are breaded or battered using conveyors need wire belting that can withstand the rigors of the process. However, traditional round balance weave belting has changed little in 100 years and is notorious for requiring replacement in as little as a week, causing costly production downtime and excess wasted product.
Food-grade balance weave belts — made of steel or stainless steel, suitable to be run in a conveyor with a sprocket drive, friction drive or chain-driven belt — can cost thousands of dollars, depending on the dimensions and quality. So, even though wear and premature replacement is a serious issue, such wire belting should not be considered a low-cost consumable item.
“If the conveyor’s wire belt gets plugged up with batter or breading or if it gets stretched out, you usually have to replace the whole belt,” said a maintenance supervisor who has worked in various food processing facilities serving wholesale and retail markets for more than 30 years. As such, he has overseen conveyor belt installation and replacement and maintained equipment for a range of food products including breaded or battered chicken, fish, cheese and vegetables.
The maintenance supervisor described the traditional wire belt longevity challenge as he observed it while working at a food manufacturer of breaded appetizers.
“The sprockets where the belt goes around the drive would build up with breading. The breading would stretch the belt until it broke, usually in about a week. So, production was often stopped for at least 45 minutes to change out the belt,” he said.
Additionally, after coating a product, excess breading, batter or seasoning often gets “carried over” to the next processing station (often a fryer) and is wasted — instead of falling through openings in the wire belt and then being reused.
Fortunately, industry innovation in the form of engineered, “shaped” wire belt has minimized these challenges. The design vastly prolongs usable life with increased strength and decreased stretch, which dramatically curtails production downtime and replacement costs.
In addition, this approach enables a significantly greater amount of surplus coating, such as batter, breading or spice, to fall through the wire belt openings to be reused. As a result, this lowers production cost even further.
Although conventional round wire belt has been the industry standard for generations, the geometry of the wire itself contributes to the problem.
Traditional round and even top-flattened wire belt presents a rather narrow opening for any given wire gauge, which makes it more difficult for excess breading or batter to fall through the opening to be reused. Such belting is usually predisposed to “blinding” of its openings. This can hasten breading or batter build-up and the clogging of conveyor sprockets, leading to belt stretch and the need for premature replacement.
In testing, typical round and top-flattened conveyor wire belt have been observed to stretch approximately 7%. Such belt stretch is typically the biggest cause for failure on sprocket-driven conveyor belts. When the belt stretches, the sprocket teeth do not engage evenly and will begin to jump the teeth, damaging the belt and sprockets in short order.
Even though many producers of conveyor wire belt simply import semi-finished product and finish it domestically, at least one U.S.-based manufacturer has gone to the root of the problem.
The solution, it turns out, is to engineer “shaped” wire that is designed to provide more strength and open area in wire belt of a given diameter. This not only significantly prolongs its usable life up to eight times or more, but also facilitates the cost-effective reuse of the excess breading, batter and seasoning that falls through the wire openings.
As an example, one engineered wire belt, called Sidewinder by Lancaster, Pennsylvania-based Lumsden Belting, a manufacturer of metal conveyor belts for industries such as food processing, compresses and expands wire so it is taller than it is wide with flat sides.
To begin with, the patented side-flattened wire’s “I-beam” design provides three times greater structural support for food industry product compared to standard round wire. The added height of the wire also provides a longer wear life without needing heavier wire. Together, the design limits belt stretch to only 1-2%.
When the food manufacturer of breaded appetizers turned to the shaped wire belt, the results dramatically improved longevity.
“Where the traditional belt would last about one week, the shaped Sidewinder belt would last about two months,” said the maintenance supervisor. “The results were excellent, and the heavier the breading or batter the more the design extended belt life.”
In terms of design, shaping the wire into taller thinner spirals than standard enhances the open area. Thus, food processors can use the same wire gauge of their current belt and gain more open area while lasting longer. Or they can increase the wire diameter to make an even stronger belt without sacrificing the critical open area.
The flattened sides of the wire also reduce the “carry over” issue, which otherwise invariably leads to coating product waste. With a minimum curvature at the top and bottom of each wire loop there is less surface area for expensive coating to contact. So, the flat sides of the shaped spiral allow any spare coating to fall through without clogging openings.
“With the Lumsden side-flattened wire belt, there is greater open area with narrower wire for the same wire diameter. So, any extra coating can drop through and be reused,” explained the maintenance supervisor.
While the cost of the shaped wire belt is slightly more than traditional round wire, the gains in production and lifespan make the return on investment (ROI) very quick, according to the maintenance supervisor.
“The side shaped wire belt lasts much longer than anything else out there and does not stretch out so you get higher production with less downtime and fewer headaches. With a larger opening for the same wire gauge, recovering and reusing any extra coating also adds to the bottom line,” he said.
For food processing professionals who have long suffered from excessive production downtime due to short wire belting lifespans on breaded or battered lines, taking advantage of the increased longevity and uptime of engineered, shaped, wire belt can provide an important edge over competitors who do not.
Del Williams is a technical writer based in Torrance, California.