Accurate proportioning of raw materials directly determines final product performance in construction chemicals production. İsnatec dosing systems feed powders, granules, and liquids into the mixer in precisely defined quantities with high repeatability. Three main technologies are offered: belt feeders (coarse, free‑flowing materials), screw weigh feeders (powders and poor‑flowing materials), and loss‑in‑weight feeders (very low‑rate additives and continuous processes). Liquid additives are dosed with diaphragm pumps and mass flow meters (Coriolis).
Screw weigh feeders are İsnatec’s most common solution. A metering screw under a hopper mounted on load cells reduces speed (two‑ or three‑stage feeding) as the target weight approaches, minimizing overfeed. Accuracy ranges from ±0.2% to ±0.5% depending on material type. Loss‑in‑weight feeders are preferred for micro‑additives (0.1‑2% – pigments, fibers, chemical additives). The system continuously weighs the entire feeder hopper and adjusts feed rate via PID control to maintain constant flow.
İsnatec’s dosing software automatically optimizes sequencing for multi‑component recipes. For example, sand is weighed first, then cement, then calcite, and finally additives. This minimizes cross‑contamination. After each component, weighing tolerance is checked; an out‑of‑tolerance component is automatically re‑dosed or the batch is cancelled. The system can handle up to 12 different components. All weighing data is linked to raw material batch tracking via barcode or RFID for full traceability.
Calibration and verification are performed periodically by İsnatec service. Self‑check routines (zero drift, linearity test, temperature compensation) are included. Load cells are protected with protective covers and pressure‑balanced bellows for dusty environments. Liquid dosing pumps feature self‑adjusting control algorithms for viscosity changes. İsnatec dosing solutions give construction chemicals producers gram‑accurate, fast, and reliable dosing, nearly eliminating standard deviation in product quality.
