Plastics Processing Measuring amplifier Application Amplifiers convert the signals from sensors into voltages and currents, their circuitry needing to meet the highest accuracy requirements. Rugged charge amplifiers now exist which are capable not only of coping with signal conversion under severe production conditions but can also carry out control tasks. A further development of the industrial charge amplifier comes equipped with a special fuzzy-logic chip, which detects the volumetric filling of the cavity and automatically switches the molding machine from the injection pressure to the holding pressure phase. This reduces the setting-up time and leads to higher reproducibility of the process. Molded part characteristics are kept within a narrow tolerance band and scrap is considerably reduced. Signal conditioners are used in application technology as well as research and development. They allow the recording of up to 32 variables from the injection molding process and can be adapted to any measuring task. Use/purpose: Charge amplifier · Ultra accurate · Built for industrial applications SMARTAmp: · Shortens the set-up phase · Achieves high process consistency Use/purpose: Signal conditioner · High flexibility for laboratory systems · Recording of the most diverse quantities Process monitoring and analysis Application The continuous monitoring of mold cavity pressure allows all process fluctuations to be detected. Thus, changes in the characteristics of the molded part ­ due for example to fluctuations in viscosity or machine wear ­ can be detected and corrected directly, so that scrap is minimized. In addition to process monitoring, with many injectionspecific functions, the DataFlow software facilitates documentation of the produc-tion process, enabling manufacturers to meet this important obligation to their customers. Process analysis represents an important step in process optimization. Optimum molded part qualities are achieved only when the cavity pressure curve matches the ideal curve. Kistler systems allow simple analysis and thus appropriate and rapid optimization of the injection molding process. Use/purpose · Automatically detects material and process fluctuations · Automatically documents the production process · Simplifies optimization Process control Application Process control systems automatically detect changes in the process and in the quality of the molded part, as well as automatically correcting the machine adjustment parameters. Thus, optimum quality is guaranteed at all times and without manual intervention. Over the long term, these systems minimize costs and maximize productivity. Kistler applies only state-of-the-art technology to achieve these aims. The SMARTAmp charge amplifier uses fuzzy logic to analyze cavity pressure for fully automatic optimization of the switch point from injection to holding pressure in the production process. Use/purpose · Fully automatic compensation of process and material fluctuations · Minimization of scrap rates · Maximum productivity DataFlow 2805A... System for process monitoring, documentation and analysis. Charge amplifier 5039A... Industrial charge amplifier. Charge amplifier 5049A... Industrial charge amplifier with fuzzy logic for volumetric switching. Signal conditioner 2853A... Modular laboratory system for signal conditioning. Signal conditioner 2859A... Modular signal conditioning system for industrial use. x­t OnLine 800.0 700.0 600.0 500.0 400.0 300.0 200.0 100.0 0 0 2 4 6 Time 8 10 12 Min Cycle No.: 7 Mean Max Cavity 1 Cavity 2 Cavity 3 Cavity 4 22 www.kistler.com