Abstract: A method and system of vacuum loading powder used in rotational molding are provided. A loader has a hopper with a tangential inlet at the top and a discharge assembly at the bottom. A vacuum source generates a vacuum at the center of the hopper drawing air and raw material into the tangential inlet. A filter assembly between the tangential inlet and the vacuum source partially separating the air from the raw material. One or more load cells between the hopper and a platform measures an amount of raw material present within the hopper.

Abstract: The present invention relates to a method and system of vacuum loading powder used in rotational molding. A loader has a hopper with a tangential inlet at the top and a discharge assembly at the bottom. A vacuum source generates a vacuum at the center of the hopper drawing air and raw material into the tangential inlet. A filter assembly between the tangential inlet and the vacuum source partially separating the air from the raw material. One or more load cells between the hopper and a platform measures an amount of raw material present within the hopper.

Abstract: The invention relates to a device for metering bulk material, in particular plastics granulate, for machines processing plastics granulate, in particular for injection molding machines, wherein at least one material funnel (2) into which bulk material can be filled and which has a material valve is provided. A weighing container (4) connected to weighing scales is optionally arranged below the material valve. A control unit is provided for the weighing scales and material valves. The material valve is designed as a metering valve (3), in particular as a flap-type metering valve. The metering valve (3) consists of a part, a closure (7), movable via a horizontal axis (6) and a fixed part, a scraper (8). The movable part has an operating arm (9) for an actuator (5) and at the end facing towards the fixed part has a closure plate (10) having a scraper projection (11). In the closed state of the metering valve (3) the scraper projection (11) touches the scraper (8).

Abstract: The invention relates to a device for metering bulk material, in particular plastics granulate, for machines processing plastics granulate, in particular for injection molding machines, wherein at least one material funnel (2) into which bulk material can be filled and which has a material valve is provided. A weighing container (4) connected to weighing scales is optionally arranged below the material valve. A control unit is provided for the weighing scales and material valves. The material valve is designed as a metering valve (3), in particular as a flap-type metering valve. The metering valve (3) consists of a part, a closure (7), movable via a horizontal axis (6) and a fixed part, a scraper (8). The movable part has an operating arm (9) for an actuator (5) and at the end facing towards the fixed part has a closure plate (10) having a scraper projection (11). In the closed state of the metering valve (3) the scraper projection (11) touches the scraper (8).