Blockage at the feed hopper is a common bottleneck in tablet production, often caused by combined factors of material properties, equipment condition, and operating parameters. Hansheng Automation offers one‑stop custom support-from problem diagnosis to precision adaptation-to help you restore stable production quickly.
1. Precise Control of Material Flowability
Excess moisture: For hygroscopic or sticky materials, use low‑temperature drying (e.g., 50–60 °C) with stepwise heating and weight monitoring to determine the end point, rather than fixed time. We can advise on drying profiles based on your material's thermal sensitivity.
High fines content: Fine powders tend to agglomerate due to static charges. Pass material through 80–100 mesh vibrating screens. We can recommend optimal screen combinations and provide verification protocols according to your particle size distribution.
2. Equipment Cleaning and Parameter Matching
Residue removal: After shutdown, clean the hopper wall with a soft brass brush and 0.6–0.8 MPa clean compressed air along the cone direction. For worn surfaces with increased roughness, Hansheng Automation offers high‑precision polishing and custom surface coatings to reduce friction and prevent thermal adhesion.
Stirrer speed adjustment: Keep speed within 20–40 rpm as a base, but fine‑tune according to the material's angle of repose. We can custom‑make eccentric scrapers or special blades based on your shaft drawings to eliminate dead zones and balance forced feeding with gravity discharge.
3. Operational Strategy Optimization
Feed rate coordination: Start at about 60% of rated capacity and ramp up after flow stabilises, using variable frequency control to avoid over‑compaction. We can assist with custom sensor brackets for early blockage warning.
Visual monitoring: Check the hopper window every 15 minutes during production. If flow slows or stalls, pause feeding immediately and inspect screens. We can supply custom‑designed level sensor supports to enable pre‑warning.
4. Preventive System
Incoming material pre‑check: For each batch, measure angle of repose, bulk density, and moisture content (target 2%–5%). We can provide simple fixture drawings for rapid in‑house testing.
Post‑shift cleaning and wear parts replacement: Clean sealing ring areas thoroughly after each shift using non‑metallic tools. For frequently opened cleanout ports, we support custom sealing gaskets in FKM or silicone rubber-machined to original or improved dimensions for durable sealing and quick access.
These measures effectively reduce hopper blockage, improve yield, and boost overall equipment efficiency. Hansheng Automation is committed to delivering high‑precision custom parts and process adaptations-ensuring every detail performs reliably under high‑speed operation.
