Gypsum Board Production Technology

Gypsum Board Production Technology

Introduction
Gypsum boards (drywall) require precise manufacturing to meet industry standards for strength, fire resistance, and dimensional accuracy. Hengshui Decheng Machinery & Equipment Co., Ltd offers complete gypsum board production technology, from raw material preparation to final finishing.

Slurry Preparation
High‑consistency mixers combine gypsum powder, water, and additives (e.g., retarders, foaming agents) to produce a stable slurry. Our multi‑shaft mixers ensure uniform dispersion in under two minutes, reducing energy consumption and improving slurry homogeneity.

Forming and Conveying
The slurry is deposited between continuous paper facings via a headbox, forming a “sandwich” that moves along a gauged conveyor. Precision gauges maintain core thickness within ±0.2 mm. Paper feeders upstream and downstream maintain proper tension, preventing wrinkles and misalignment.

Setting and Cutting
As boards travel along the forming table (typically 3–5 m long), initial hydration occurs. An infrared moisture sensor tracks setting progress. Upon reaching the cutting unit, adjustable steel knives produce boards of consumer‑specified lengths with straight, smooth edges.

Drying and Finishing
Cut boards pass through a multi‑zone convection oven, with temperatures ramping from 120 °C to 200 °C over a 30 m tunnel. Exhaust heat is recovered to preheat inlet air. Post‑drying, boards are calibrated with top‑and‑bottom rollers, ensuring parallel faces and uniform thickness.

Edge Profiling and Packaging
Beveling stations can form tapered or square edges as required. Stacking conveyors align boards into neat piles, then automatic strapping and palletizing units prepare them for shipping. Integrated weight sensors confirm stack heights and counts.

Digital Control
All stages are managed via a unified control system. Recipes for different board types (e.g., fire‑rated, moisture‑resistant) adjust slurry composition, conveyor speed, oven profile, and cutting settings. Data logs support traceability and continuous improvement.

Conclusion
By combining precise slurry mixing, forming, automated cutting, energy‑efficient drying, and digital control, Hengshui Decheng’s gypsum board production technology delivers boards that meet rigorous performance criteria while optimizing energy and labor costs.