Vertical Pin Type Bead Mill

A vertical pin type bead mill uses a vertical, pin-studded agitator shaft immersed in a stationary, jacketed chamber. The vertical layout gives a compact footprint and a top discharge screen for fast media removal and cleaning. A horizontal bead mill places the grinding chamber horizontally and is generally tuned for higher continuous throughput. The vertical pin mill is the better fit when your runs are batch or semi-continuous and changeovers are frequent.

The PZL series is rated for a fineness range of 1 to 15 micron, and with small 0.2 to 1.5 mm zirconia media it reaches the nanometre range for suitable low-to-medium viscosity products. Exact particle size depends on the material, bead size and residence time, so POLYC confirms it with a representative material trial before final sizing.

It is designed for low-to-medium viscosity materials, typically up to about 1,000 mPa.s (1,000 cP). For higher-viscosity pastes in the tens of thousands of cP, a horizontal bead mill or a basket mill is usually the better choice. The jacketed chamber keeps temperature stable during longer grinding cycles.

Power is input by the forced displacement of media through an inner and outer peg annulus, with a pre-dispersing zone and internal media recirculation. Separation is by centrifuging, so there is no fine screen to clog; screen or gap separator options are matched to the media size you use. Product discharges through a removable protection screen on top of the inner stator.

Chamber volume spans 5 to 100 L with motor power from 7.5 to 45 kW. The PZL model range (0.2 to 30 L) scales the same vertical pin principle up to a 0.5 to 1,000 L production line, so the machine covers lab, pilot and industrial batch duties.

Yes. The open-top chamber design simplifies media charging, inspection and cleaning, and the top protection screen is removable without draining the mill. That makes it practical for facilities running many colours or product types where downtime between batches matters.

It serves printing inks and electronic pastes (including inkjet, gravure and LCD filter ink), pigment pastes and masterbatches, agrochemical suspension concentrates and suspo-emulsions, cosmetics, pharmaceuticals, food, textiles and ceramics. These are typically low-to-medium viscosity fine or nano grinding duties.

Start from your material viscosity, target fineness and batch volume, then choose chamber size and bead size (0.2 to 1.5 mm for nano targets). Tell POLYC your material and process so engineering can confirm power, cooling duty and separator type. Final particle size and throughput are validated with a representative material trial before manufacture.