Summary

Durante la producción a gran volumen de porciones de queso empacadas individualmente, los transportadores entregan el producto a las estaciones de empaquetado. Las estaciones de almacenamiento regulan el flujo para que coincida el empaquetado; Los sensores miniatura certificados por Ecolab detectan la presencia de cada porción después del almacenamiento, lo que activa el ciclo de empaquetado. Los parámetros de sensibilidad para cada tamaño de porción, almacenados en la memoria incorporada del sensor, se pueden actualizar de forma remota sin intervención manual, lo que elimina la necesidad de una desinfección no planificada entre lotes.

Valor al cliente

  • Los sensores certificados por Ecolab son ideales para instalaciones de producción higiénicas
  • Amplio rango de operación acomoda una gama completa de tamaños de porciones
  • Los parámetros de sensibilidad se recuperan o actualizan de forma remota a través de IO-Link
  • Se evita la sanitización innecesaria entre lotes
  • Uno o dos pasos de ajuste optimizan la configuración inicial del sensor
  • La alarma de estabilidad resalta la sensibilidad reducida, evitando paros no planificados
  • Se evita el tiempo de inactividad al eliminar la necesidad de técnicos que asistan a las máquinas

Ventajas específicas de los productos

  • Sensores fotoeléctricos certificados por Ecolab con modo de supresión de fondo
  • Protocolo de conexión en serie IO-Link habilitado en las versiones PNP sin costo adicional
  • Parámetros de sensibilidad preprogramados almacenados en la memoria incorporada del sensor
  • Recuperación de sensibilidad remota o actualización a través de IO-Link
  • Sensores robustos con carcasas de plástico en miniatura (20 mm x 30 mm x 10 mm)

Aplicación cliente

A Swiss manufacturer of premium dairy products produces a range of individually packaged cheese portions in a high-volume hygienic production facility. Once cut to size, cheese portions travel on a food-grade conveyor to a packaging station; the duration of the packaging cycle is dependent on the type of cheese and the portion size.

Prior to packaging, a buffering station produces a regular flow of portions with a predetermined spacing to suit the packaging throughput. The two operations must be synchronized; the manufacturer requires a sensor system that detects the presence of each cheese portion as it leaves the buffering station, triggering the packaging cycle.

Sensors must be food-grade certified and withstand the aggressive cleaning agents used during washdown routines. They must also accommodate the full range of portion sizes without the need for manual adjustment, as this would necessitate sanitization each time the portion size changes. Maximizing throughput is an additional priority; rapid changeover between product batches is essential.

Solución al cliente

Ecolab-certified, diffuse-mode photoelectric sensors with background suppression from the Contrinex C23 product family are ideally suited to this application. These miniature cubic devices, mounted above product conveyors immediately after each buffering station, detect the presence of cheese portions as they pass underneath. Positioning sensors is simple thanks to a range of adjustable stainless steel mounting brackets.

An industry-standard PNP normally open output with an M8 connector ensures optimum flexibility. Additionally, IO-Link, a standardized point-to-point serial connection protocol for sensors and actuators, is enabled on PNP versions at no additional cost, offering the advantages of digital communication without the need for special cabling. A second output provides a stability alarm in the event of reduced sensitivity, flagging the need for preventative maintenance before any performance degradation occurs.

Robust sensor construction, featuring miniature (20mm x 30mm x 10mm) plastic housings, ensures reliable operation in the demanding washdown environment; Contrinex C23 devices are rated to IP67. An operating range between 15mm and 250mm, adjustable via a teach button or via IO-Link, accommodates the range of portion sizes without compromise.

A brief one- or two-step teach procedure simplifies initial set-up. One-button operation allows process engineers to teach the target object and, optionally, the background, each time a new portion size is introduced. Once taught, sensitivity parameters are stored on the sensor’s inbuilt memory and may be retrieved or updated remotely via IO-Link, eliminating the need for manual adjustment.

These rugged miniature sensors meet the customer’s need for reliable operation with little or no manual intervention, while unplanned sanitization is avoided. The solution is highly cost-effective with minimal non-productive time; throughput is maintained at or above target levels.

Products used