Semi-Automatic Weighing Filling and Packing Machine The Semi-Automatic Open Mouth Bag Weighing and Filling Machine is designed for quantitative packaging of powders and fine-grained materials. It combines accurate weighing, controlled feeding and pneumatic bag clamping in one system. The operator manually places the bag, while the machine completes weighing and filling automatically. It is suitable for calcium carbonate, ceramic powder, carbon black, rubber powder, pigments,