Fully Automated Closed Loop Spray System Provides Outstanding Monitoring and Control Capabilities A carpet manufacturer needed an automated spray system to apply a latex-based solution as an anti-slip backing on their carpets. To keep their operations running at peak efficiency, they needed a system that provided outstanding monitoring and control capabilities. Problem: The customer needed to control the application rate of the dry product in a specific range with the application rate remaining constant even at line speeds which varied between 15 m/min and 25 m/min (49 ft/min and 82 ft/min). Since the product being sprayed is very tacky and plant safety is an issue, it was imperative to minimize spray drift, avoid overspray and install an effective rinsing system to keep the system clean. The control system also needed to account for three different carpet widths on the same machine. Finally, the control system needed to monitor two latex spray tanks and determine when a tank was empty so that the other one could be activated. Solution: A fully automated spray system was designed and installed by AutoJet Technologies. The Model 2250 AutoJet Spray Controller met all of the customer's needs using powerful SprayLogic™ software. The controller detects the various carpet widths through proximity switches and automatically switches on the appropriate bank of stainless steel ¼JAUH Automatic spray guns (3 spray gun banks in total). A speed dependent closed loop flow rate control system was implemented. The latex flow rate is measured with an electro-magnetic flowmeter and the Model 2250 spray controller continuously adjusts the flow rate to the spray guns by regulating the RPM of an eccentric worm pump with a frequency driven motor. The continuous flow rate calculations are based on six factors: The setpoint for the desired dry product application rate The measured flow The speed signal coming from the customer's PLC that controls the speed of the production line The dilution ratio of the latex The specific gravity of the latex The measured carpet width In order to prevent clogging of the spray tips, a fully automated rinsing system was implemented. When the system stops spraying for longer than a predetermined length of time, a piston-activated stainless steel rinsing gutter is automatically positioned under the spray nozzles and either a latex spray cycle or a complete rinsing cycle is performed. Operating conditions such as flow rate, liquid and air pressures, tank levels and carpet widths are constantly monitored by the Automatic spray system. Fault detections were established using SprayLogic software which allow the controller to generate alarms and to shut the entire system down under specific conditions. The "System Integrity Checking" program automatically detects spray nozzles that are clogged or worn. The Model 2250 controller then generates alarm messages such as: "Check clogged nozzles" or "Check worn nozzles". The spray controller also has a built-in algorithm that prevents the pump from running dry. The custom AutoJet spraying system has allowed the customer to gain a competitive advantage by adding the anti-slip feature to his carpets, while keeping up with existing production throughput. The automated rinsing system has minimized maintenance and all environmental and safety requirements for applying latex have been met.   También Vea Referencias Guía de selección de boquillas de aspersión Literatura Catálogo General que incluye boquillas de aspersión y accesorios, datos técnicos e ideas para solución de problemas, Catálogo 60B   · Ver   · Solicitar Catálogo General que incluye boquillas de aspersión y accesorios, datos técnicos e ideas para solución de problemas, Catálogo 60B-M - Metric   · Ver   · Solicitar Se requiere la versión 5.0 o mayor de Acrobat para ver documentos PDF . Presione Aquí para conseguir la versión más reciente de Acrobat Reader. Para asistencia con aplicaciones o hacer un pedido de cualquier producto de Spraying Systems Co., póngase en contacto con su Oficina Local de Ventas e Ingeniería.