Accurate casting of resin into moulds and process equipment - involves measuring pre-filled level in cavity comparing it with reference level and completing filling according to difference in measured levels

摘要

In a process for filling moulds (1) with a resin or fluid the cavities are pre-filled to a given level with a prescribed quantity of fluid. Accurate completion of filling to a determined level is ensured by measuring the level of the pre-filling (3) and comparing it with a given reference point (4) on the mould (1). The difference in levels is used to calculate the amount of fluid necessary in a second filling operation to bring the level to a set mark. Process equipment comprises a measuring unit (6) for determining level differences between the pre-filling (3) and the reference (4) point. Information is fed to a control unit (7) which determines the amount of fluid to be released into the mould (1) to bring the level to the set figure. USE/ADVANTAGE - Process and appts. are used for casting resins into moulds, e.g. encapsulating electronic components. ADVANTAGE - Allows accurate filling of different moulds to a pre-determined level on a continuous and automatic basis.