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ISO 08.01.02.064.GB 986731 Rev. May 2001 Rev. May 2001 GraviMaster-FGB-M05 (S) Page 1 Gravimetric Blender 1.0 INTRODUCTION 2.0 CONTROLS 2.1 Blender startup 2.2 Blender status 2.3 Machine-mode 2.4 Production-modes 2.5 Mixer-mode 2.6 Dispense modes 2.7 Batch handling 2.7.1 Production control 2.7.2 Recipe to weight calculation 2.7.2.1 Method Standard 2.7.2.2 Method Percentage 2.7.3 Adding extra materials 2.7.4 Additive to regrind 2.7.5 Regrind control 2.7.5.1 Empty regrind Control 2.7.5.2 Stock Silo Control 2.7.6 Dispensing 2.7.7 Calculations 2.8 Datalogging 2.9 Certifi cates 3.0 USER INTERFACE 3.1 Operator-interface 3.1.1 Keyboard 3.1.2 User control 3.2 Recipes 3.2.1 Change components 3.2.2 Add/change recipes 3.2.3 Change current recipe 3.3 Timely information 3.3.1 Production screen 3.3.2 Material usage screen 3.3.3 Input & Output monitor 3.4 Adjustment of the gravimetric blender 3.4.1 Calibration of the weighbin 3.4.2 Tare of the weighbin 3.4.3 Hardware-reactiontime 3.5 Overview of parameters 3.5.1 Public parameters 3.5.2 Protected parameters 3.6 Reports and overviews Rev. May 2001 GraviMaster-FGB-M05 (S) Page 2 Gravimetric Blender 3.7 Settings of the user-interface 3.7.1 Change the rights of an operator 3.7.2 Change entrycode 3.7.3 Change date and time 3.7.4 Revision code of the system 3.8 Menu hierarchy 4.0 INSTALLATION 4.1 Demanded connections 4.2 Attaching 5.0 ALARMS 5.1 Alarm reports and solutions 6.0 MAINTENANCE AND REPAIR 6.1 Maintenance 6.2 Replacement of parts 6.2.1 Replacement of printed circuit 6.3 Cleaning the machine 6.4 Transportation of the GraviMaster 7.0 TECHNICAL INFORMATION 7.1 General machine specifications 7.1.1 Safety measures 7.2 User-interface specifications 7.3 Valves specifications 7.4 Air pressure cylinders specifications 7.5 Electrical diagrams Rev. May 2001 GraviMaster-FGB-M05 (S) Page 3 Gravimetric Blender 1.0 INTRODUCTION GRAVIMETRIC FEEDING An efficient materials blending system is an essential feature of the modern plastics processing industry. Dosing each component on the basis of weight shows distinct advanta ges over traditional volumetric systems. The quantity of material delivered is precise and unaffected by variations in bulk density, flow characteristics and particle size. Ferlin Plastics Automation now have a range of more than twenty blenders that deliver the benefits of gravimetric blending at a price that makes other gravimetric ... and most volumetric systems ... look distinctly expensive. FGB SERIES GRAVIMETRIC BLENDERS “GraviMaster” blending systems are available in more than twenty diffe rent models with a throughput capacity range from 10 to 750 kg/hr for the standard units. The number of components on the standard unit is two to six. But purpose-built units may designed for additional feeds up to a maximum of ten and a throughput capacity up to 1500 kg/hr. The blending units may either flow-control-valve design or have a combination with auger-feeders. The proven “GraviMaster” blending systems are being used successfully in Injection-moulding, Blow-moulding, Sheet-extrusion and Film-extrusi on. ACCURATE WEIGH SYSTEM Each component is dispensed into a weigh-pan using one set of load cells. When all the components are correctly weighed, the blend is discharged into a mixing chamber. A high efficiency horizontal mixer is programmed to give a uniform blend which discharges to a storage bin with suction device, or directly into the processing machine hopper. The system is capable of extremely accurate measurements of additive, even at very small percentages or ratios. Load cells of the highest accuracy are used, weighing to within 0.01 gm. The accuracy of the process is enhanced by the software system which is designed to compensate in a subsequent batch for any errors arising in a prece ding batch. Overall accuracy of 0.1% can be achieved. COMPACT AND MODULAR CONSTRUCTION The units are designed and built as a modular construction using standard components where possible, so that all components are readily obtainable. All components which are in contact with the raw material are made in stainless steel. This includes hoppers, valves, augers, weigh pan, mixer and mixing chamber. When auger feeders are instal led, these can be quickly accessed for easy cleaning. The mixing chamber and weigh pan can be removed easily for cleaning and access. The construction is in accordance with the essential require ments under the CE regulations. Rev. May 2001 GraviMaster-FGB-M05 (S) Page 4 Gravimetric Blender RELIABLE PROCESS CONTROL The FGB control system incorporates the latest in computer and micro processor technology for total automation of recipe entry and stora ge, inventory control and process monitoring. The control panel (user-interface) is provi ded with a micro-controller and industrial PC with LCD-display, functional keyboard, fiber optic communication cable (or RS-422) and parallel printer port. Features are: • data storage of all plant raw materials. • easy call u...