In solid dosage and powder processing lines, granules discharged from a fluid bed granulator typically proceed through the following downstream unit operations and interconnected equipment:
1. Core Downstream Unit Operations
Inline Milling and Sizing: Discharged granules often contain loose agglomerates or wide particle size variations. Materials first pass through a conical sizing mill or oscillating sieve to achieve a uniform particle size distribution (PSD) tailored for compression or filling.
Final Blending: Sized granules are transferred to an intermediate bulk container (IBC) bin blender or tumbling mixer, where lubricants (e.g., magnesium stearate), disintegrants, or glidants are added to ensure batch homogeneity and steady flowability.
Functional Coating (Optional): For controlled-release pellets or products requiring taste-masking and moisture protection, granules are routed to a bottom-spray Wurster coater or pan coater for film or enteric coating.
Final Forming and Packaging: Uniform granules feed into high-speed rotary tablet presses or automated capsule filling machines, followed by secondary packaging lines (blister packaging, sachet packaging, or bottle filling).
2. Closed-Loop Transfer and Critical Mechanical Components
Modern solid dosage lines connect the fluid bed granulator directly to downstream mills and IBC transfer stations via vacuum conveying systems, minimizing dust emission and cross-contamination in compliance with GMP standards.
To meet the alignment and airtightness demands of these interconnected transitions, Hansheng Automation custom-machines sanitary pneumatic powder valve spools, quick-clamp vacuum conveying couplings, custom sizing mill impellers, and tablet press feeder guide rails based on customer engineering drawings. By maintaining fine surface finishes (Ra≤0.4μm) and tight dynamic sealing tolerances, we provide dependable hardware support for seamless downstream process transitions.
