PDDB PSDB is a weight-in-loss process. That is, a screw conveyor is installed under the weigh hopper, three (3) weighing sensors are hopper mounted and connected to the screw conveyor that is together with the bag clamp device makes up the weight-in-loss system.
The feeding screw feeds material into the hopper automatically then stops as it approaches the upper target limit. The weighing control system then sends a signal to deliver the material to the bag (s) that are positioned underneath and held onto the packing machine by bag clamps that utilize compressed air. The material will stops conveying when it approaches the preset target. The screw conveyor will feed the material into the bag immediately after the bag clamps are closed. A feature of this system is that there is very little material dust generated during the filling process since the material is gradually fed into the bag as opposed to a single dump weight at one time. As a guilde, 25kg material is fed in approx. (6) six seconds. The bagging spout is made of stainless steel, this prevents material adherence, therefore a high degree of accuracy and sanitation is achieved.
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