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As part of the HEDRICH GmbH Group, VOGEL moulds and machines AG has continuously developed its product portfolio for the APG process in recent years. The process, which is also known as low-pressure casting, is used, for example, in the manufacture of instrument transformers and medium and high-voltage parts in the electrical industry. Furthermore, the field of application for this efficient process is constantly expanding. When using the APG process, the component to be cast or the negative mold is filled with epoxy resin. The chemical cross-linking of the casting compound then begins under the application of heat - this is known as “gelling”. The material shrinkage that occurs during this process is compensated by a continuous dynamic pressure on the casting material to ensure an optimum filling level of the mold. A further increase in quality can be achieved if not only the casting resin is prepared under vacuum, but the mold is also filled under vacuum. For this purpose, either the casting mold itself can be designed to be vacuum-tight or a conventional casting mold can be installed inside a vacuum chamber on the clamping machine (see photo). The advantages of the so-called VPG process (Vacuum Pressure Gelation) include absolutely void-free components, even with very complex shapes. And compared to the conventional APG process, the dielectric properties of the manufactured products are even better. #APG #VPG #vacuumcasting

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Nach wie vor führend im kombinierten automatischen Vakuum-Druckgelierverfahren. ( Vacuum-APG)

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