Vineraj Weighing Automation is likely a manufacturer of screw feeders, which are mechanical devices used to control the flow of dry bulk materials such as powders, granules, and pellets. Screw feeders consist of a screw conveyor, or helix, that rotates within a cylindrical housing to move material from a hopper or bin to a discharge point. The speed of the screw can be controlled to regulate the flow of material, allowing for precise metering and dispensing. Screw feeders are commonly used in a variety of industries, including food processing, chemical production, and material handling, to move and meter materials in a controlled and efficient manner.