By S. K. Sundaram
The 75th Glass challenge convention is geared up in line with the subsequent issues: Glass Melting, Forming, Energy and Environmental, Refractories, Sensors and keep watch over, Modeling
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Extra info for 75th Conference on Glass Problems : Ceramic Engineering and Science Proceedings, Volume 36, Issue 1
5gram gob weight discrepancy was observed. A fine tune step was performed. 6 gram of the set points. All gob weights were within the gob weight variation tolerance for this particular production. 75th Conference on Glass Problems · 33 Multi Gob Weight Production Figure 6. The test results on a customer machine (SG, 8 sections, three gob weights) Figure 7 shows the field results on a second customer machine, which is a 12 section, double gob, 2 gobs weight production. The target gob weights are 933gram and 952gram.
This provides a variable capacitance, which can be detected without any wired connection to the moving plunger, avoiding problems with flexing and breaking connections, or sliding contacts. In addition the design is rugged enough and proper materials are utilized to allow it to withstand elevated temperatures experienced within the plunger housing. 42 · 75th Conference on Glass Problems Closed Loop Control of Glass Container Forming Figure 6. Emhart PPC system Closed Loop Control Strategy The Plunger Up Control controls utilizes an FPS (Flexible Pressure System) control valve which can be set to supply four different pressure values (three different positive values and zero) to the plunger’s pneumatic cylinder over the duration of the pressing cycle.
12 section machine). 75th Conference on Glass Problems · 45 Closed Loop Control of Glass Container Forming A comparison of open loop and closed loop PUC for multiple machine sections is shown in, Figure 11, which plots data for all three cavities of Section 7 through 12 (labels S7,S8… S12) of a twelve section triple gob (3 cavity) machine. Considerable variation in rise time is evident while in open loop (prior to cycle 1200). It can be seen that this variation is dramatically reduced once the closed loop control is switched on.
75th Conference on Glass Problems : Ceramic Engineering and Science Proceedings, Volume 36, Issue 1 by S. K. Sundaram