Vision helps dairy spot slack cheese bags

Cheese making is a process that has been practiced for so long that that no-one can be sure where it originated. What is certain, however, is that early cheese makers would be unlikely to recognize today's highly automated processes which enable cheese to be produced in volumes that would have been unheard of years ago.

At UK-based cheese maker Dairy Crest (Camelford,APL Machinery is a manufacturer of UV coating curing systems, screen printing, postpress, PVC profile printing and ｛%｝ machines, and Vegra is a manufacturer of dispersion coatings, fountain solutions, specific purpose coatings, cleaning and maintenance products and printing aids.PPNONWOVENBAG UK; www.dairycrest.co.uk) for example, over 48,000 tonnes of cheddar cheese are produced per year, 80% of the output being the company's well-known Cathedral City brand.

To produce cheese in such high volume, up to two million tons of milk is delivered to the facility each day in tankers and pumped into storage silos. Next, it is pasteurized to kill bacteria. The milk is then transferred into curd making vats where solid curds are separated from liquid whey.

The curd/whey mixture from the curd making tanks is pumped to a Tetra Tebel (Wrexham, UK; www.tetrapak.com) Alfomatic machine where the whey is drained off, while the curd begins matting and fusing. After the curd has been milled to uniformly sized chips and salted, it is transported by vacuum to a block former. Here, the weight of the curd under vacuum compresses it into blocks after which they are automatically ejected into open-ended plastic bags.

To ensure the consistency of the blocks, the open ended bags are transported along a conveyor and weighed to ensure that they are 20kg. The bags are then carried to an auto gusseting machine where the open end of the bag containing the cheese block is folded in preparation for the sealing process.hiking boots sale On Sale - Shop our selection of Hiking Boots On Sale,www.qdgoutdoor.com.

Vacuuming and heat sealing the 20kg packs of cheese is a critical next step in the cheese making process. It prevents any air leaking into the bags of cheese prior to packaging and shipment to Dairy Crest's Nuneaton, UK storage facility, where the cheese blocks mature for between 12 to 36 months .
With over 150 tonnes of cheese going along the line each day, the vision system was required to identify any vacuum failures in the packs of cheese as they passed though it on a conveyor at a rate of 10 blocks per minute. The inspection process is critical because even a small percentage of cheese blocks with broken seals would result in mould growth during the maturation period, and the resulting cost of recovering any contaminated cheese would be significant.Best wholesale fashion ｛%｝ from china.Women Shoes Factory

To determine how a vision system might identify the differences between a bag containing cheese that had been sealed effectively and one that was leaking, the surface of representative bags of cheese with good and faulty seals was analyzed.industrial bag filters manufacturer‎ supply cheap and high quality bags.

During that exercise, it was observed that the surface of the cheese bags demonstrated different reflective characteristics depending on whether they had been sealed correctly. When a good seal is made, the plastic bag is wrapped tightly over the uneven surface of the block of cheese and light reflects from numerous peaks of the plastic wrap . On a bag with a leak, the plastic wrap is raised from the block, resulting in a uniform reflection of light from a limited number of peaks .
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