Multihead weigher
Multihead weighers (also combination scales and weighers closely. Multihead weigher combination weigher or ) -provided containers are used among other things (such as bags, boxes, cups, cans or jars ) in the food industry for filling. The ability to meet a specified target weight at high speed accurately, in the automation of packaging processes plays a crucial role.
- 3.1 Single Documents
- 3.2 External links
Description
Function
In a circular multihead weigher the product is supplied centrally above the weighing system ( eg a distribution plates ). The product is conveyed from there radially to the outside of the circularly arranged storage containers (so-called Vorschalen ) and then into the underlying weighing container (so-called weighing dish ). A computer determines from several portions of the combination that comes closest to the target weight and causes the simultaneous Abschüttung. The emptied storage and weighing then be filled immediately. Nowadays, there are, on the circular models addition, also multihead weighers with an arrangement that makes it a simple operator to intervene manually at Produktverklumpungen and dealing with sticky products. The techniques to convey the product from the distributor plate to the shell, including gravity, in conjunction with vibration coreless coil and conveyor belts.
History
After the Second World War resulted in increased demands on the quality of products, government regulations, and shortened production times, a change to more accurate, faster, easier, more reliable and more rational Verwiegungstechnologien. The multihead weigher was invented in 1972 to, weigh green peppers that were packed manually until then quickly and accurately. The new technology was quickly adopted for a number of other foods, including vegetables and snacks. The method " ... literally revolutionized the principles of industrial weighing. For packaged products maximum weight tolerance of ± 1g can be met, regardless of the size and nature of the packaged goods. "
In the seventies and eighties, the use of multi-head weighers spread particularly rapidly in product categories in which it came to highly mobile individual products - such as cherry tomatoes or potato chips. In the meantime, however, were able, thanks to the technical development of Mehrkopwaage increasingly sticky and ' unruly ' products are weighed automatically - including fresh meat, poultry, cheese preparations and salads. In parallel, the automated weighing of products with low piece size was possible, such as coffee granules or black. In addition, multi-head weighers were designed to sensitive products, eg Cookies, or elongated products such as salt sticks to weigh.
For some time used multihead weighers and the rapid creation of product mixtures with constant mixing ratios. For this, the scales are divided vertically and provided with each individual product feeds and outlets. Each partition operates as an independent balance weight with a specific target, where the individual products are brought together in predetermined mixing ratio at the lower end of the balance and discarded together.
Swell
Single Documents
1 Force Measurement Panel ( 2010). A Guide to Dynamic Weighing for Industry. London: The Institute of Measurement and Control. 22-28. ( Downloadable free from www.npl.co.uk / instmc - wfmp ) 2 Kageyama, T. ( 2006). Development Trend of Recent Weighing Machines. Japanese Packaging Institute Journal. 44 (11), 863-867. 3 Ho, E. ( 2009). Form / Fill / Seal, Vertical. In: Yam, KL Encyclopedia of Packaging Technology. 3rd ed, New Jersey: Wiley & Sons. 546