Sieving Multi Mill

The Sieving Multi Mill operates on the principle of impact, shear, and attrition for size reduction, combined with mechanical sieving for classification. Material is fed into the chamber where high-speed rotating blades strike and propel it against the chamber walls and screens. This “top-down” approach disintegrates coarse particles into finer ones via mechanical energy. Particles smaller than the screen aperture pass through radially or tangentially for discharge, while larger ones recirculate for further milling. The process ensures a narrow particle size distribution (PSD) by controlling rotor speed, screen size, and feed rate.

Multi Mill Machine Video

Applications

• Pharmaceuticals: Pulverizing APIs, excipients, or granules for tablets/capsules; wet/dry granulation; de-lumping after drying.

• Food: Size reduction of spices, flours, or confectionery powders.

• Chemicals/Cosmetics: Milling pigments, dyes, or fertilizers; emulsification of semi-solids.

• Other: Pesticides, plastics, ceramics—ideal for heat-sensitive or friable materials requiring uniform sizing.

It excels in achieving bioavailability enhancement through increased surface area and dosage uniformity.

Advantages

• Versatility: Handles wet/dry materials; supports granulation, shredding, chopping, and mixing in one unit.

• Precision: Interchangeable sieves ensure narrow PSD and high uniformity, reducing downstream issues like segregation.

• Efficiency: High throughput; 50% faster than conventional mills for low-density materials.

• Compact Design: Small footprint suits cleanrooms; easy mobility and integration with lifting columns.

• Safety/Hygiene: Low noise, easy disassembly for CIP, and GMP-compliant with minimal dust generation.

• Cost-Effective: Low maintenance, energy-efficient, and scalable from lab (5 kg) to production (1,000 kg) batches.

Safety and Validation Considerations

• Safety: Enclosed chamber with interlocks, guards, and emergency stops; vibration dampers reduce noise and wear.

• Validation: IQ/OQ/PQ tests for PSD consistency, throughput at 30-80% loads, and cleaning efficacy.

• Maintenance: Inspect blades/screens quarterly; ensure oil-free operation to avoid contamination.

Considerations

• Limitations: Not ideal for very sticky or oily materials; requires screen changes for different PSDs.

• Customization: Options include vacuum feeding, jacketed chambers for cooling, or explosion-proof designs for volatiles.

• Trends (as of 2025): Integration with continuous manufacturing lines and AI-monitored PSD for real-time adjustments.

Salient Features of Pharmaceutical Multi-Mill

• Compact GMP Model.

• Suitable for dry and wet granules.

• All contact parts are made out of SS304 quality material.

• Castor wheel provided for the ease of mobility.

• Sieves available in sizes of 0.5 to 12mm hole diameter.

• 12 numbers of beaters with knife edges & impact edges & 02 nos. scrapper blades.

• In GMP Model complete body cladded with SS304 and polished to the matt finish & in Standard Model excluding product contact parts, all other parts made out of C.I. or M.S. and colored.

• Machine rated for continuous operation.

• Higher output with process uniformity.

• All contact parts can easily be dismantled and cleaned for change of product.

• Wide range of SS perforated screens available

• Machine portable on castor wheels.

• Reversible direction of blade rotation.

• Different size of screen / speed / number of blade / directions of rotation of blade can be selected.

Design and Construction of Sieving Multi Mill

Unit consists of S.S 316 AISI quality material rotor fitted with 8 Nos. SS blades knife/impact edge having swing action and 2 Nos. scrapper blades. Rotor assembly fitted on SS shaft with suitable bearing. Other end of the shaft directly coupled with suitable H.P./3 PHASE/415V/60CS/2800 RPM flange mounting type motor through love jaw coupling. The speed variation will be achieved through A.C. Frequency drive unit with selected 4 speeds of i.e., 2800RPM/2200RPM/1600RPM/800RPM.

S.S Charging hopper with slide plate arrangement to control the material feed rate. S.S Screen with hold plate is provided to get desired size of granules. S.S discharge hopper with necessary holding arrangement. Drive unit supported on S.S column with S.S base plate fitted with PU castor wheels to achieve portability.

Technical Specification of  Multi Mill

Note: We also having 1 H. P., 5 H. P. and 7.5 H. P. multi mill machines.

* Power voltage can be adjusted as per customer’s domestic power voltage requirements.
* Rights of technical improvements & modification reserved.
* Illustrations & dimensions are shown for information purpose only.