Triple Roller Mill for Offset Ink

PTM Triple Roller Mill for Offset Ink
Precision Shear for Extreme Viscosity Pastes (Up to 3,000,000 cps)

The PTM Precision Triple Roller Mill is the ultimate grinding solution for highly viscous, non-flowing materials where conventional bead mills fail. Utilizing three horizontally positioned chilled alloy rollers rotating at differential speeds, it generates immense shear force at the nip gaps to crush pigment agglomerates. Equipped with an advanced internal roller water cooling system, it strictly controls frictional temperature rise (ΔT < 10°C), making it indispensable for producing premium offset printing inks, conductive silver pastes, and cosmetic creams.

Core Technology & Working Principle

Differential Speed Shear

Three rollers rotate in opposite directions at different speeds (slow, medium, fast). The tight clearance between the rollers generates massive shear forces to break down pigment agglomerates.

Internal Roller Water Cooling

High shear creates extreme frictional heat. The PTM series features deep internal water manifolds within the rollers, strictly controlling temperature rise (ΔT < 10°C) to prevent ink degradation.

Chilled Alloy Rollers

Rollers are cast from high-hardness chilled alloy steel, precision ground and mirror-polished. This ensures absolute parallelism and micron-level gap accuracy across the entire roller length.

Working principle: Paste is fed between the slow and middle rollers. It transfers from the slow roller to the middle roller, experiencing its first intense shear. It then transfers to the fast roller for a second shear stage before a tight discharge apron scraper blade peels the perfectly refined ink into the collection apron.

Precision Engineered Details

Chilled Alloy Rollers

Mirror-polished high hardness alloy steel ensuring precise gap tolerances.

Copper End Dams

Adjustable side dams prevent thick paste from escaping the grinding nip area.

Precision Handwheel Control

Micro-adjustment handwheels allow operators to fine-tune the shearing gap.

VFD Digital Control Panel

Variable frequency drive integration for precise roller speed matching.

PTM Technical Parameters

Model	Roller Dia. (mm)	Roller Length (mm)	Motor Power (kW)	Output Range (kg/h)
PTM-150	150	300	2.2 kW	10 - 20
PTM-260	260	650	7.5 kW	20 - 50
PTM-406	406	1000	22.0 kW	50 - 150

*Note: Maximum processing capacity depends heavily on initial paste viscosity and required fineness. Customizations including hydraulic roller tensioning systems and Ceramic (Alumina/Zirconia) rollers are available upon request.

Our Manufacturing Advantages

POLYC 9000 m2 Precision Machinery Manufacturing Facility in Wuxi China

POLYC's 9,000 m² manufacturing facility in Wuxi. We handle 100% of precision roller machining, gear transmission assembly, and dynamic balancing in-house.

Real Manufacturer

Direct production in Wuxi, Jiangsu. We control roller grinding, alignment, and hydraulic assembly internally — no trader markups.

24-Hour Online Support

Engineering team responds within 24 hours across time zones for commissioning guidance, gap adjustment, and spare parts.

100% Customizable

Custom motor voltages, explosion-proof builds, and optional Alumina/Zirconia ceramic rollers for metal-free processes.

30-45 Days Fast Delivery

Standard PTM models ship in 30-45 days from confirmed drawings, thanks to our vertical in-house production.

Strict Quality Control

ISO9001 and CE certified. Every mill undergoes strict roller alignment checks, water manifold pressure testing, and dry-run tests.

3-Year Warranty

Backed by a 3-Year Global Warranty on the main structural frame, drive gearboxes, and electric motors.

Target Application Spectrum

Offset & UV Inks

Conductive Silver Pastes

Cosmetic Creams

Heavy Adhesives & Sealants

Get a Configured Quote Within 24 Hours

Tell us your paste viscosity and target capacity — our Wuxi engineers will return a drawing and direct factory price fast.

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Technical FAQ

Why use a triple roller mill instead of a bead mill for offset ink?

Offset inks possess extreme viscosities (up to 3,000,000 cps) which would instantly clog a standard bead mill. A triple roller mill utilizes high-pressure nip gaps between three counter-rotating rollers to physically crush agglomerates in stiff, non-flowing pastes.

How does the PTM series prevent the ink from overheating?

Extreme shear generates significant frictional heat. Our PTM series features internal water cooling manifolds within the chilled alloy rollers. This precision thermal control maintains the temperature rise (ΔT) to strictly below 10°C, preventing thermal degradation of sensitive ink pigments.

How is the roller gap adjusted?

Standard PTM models feature precision manual handwheel adjustment for the roller nip gap. Fully automated hydraulic gap tensioning systems with digital PLC readouts are available for high-end industrial models.

What materials are the rollers made from?

The rollers are cast from high-hardness chilled alloy steel, precision-ground and mirror-polished to ensure perfect parallelism. Aluminum oxide or Zirconia ceramic rollers are available upon request for metal-free electronic pastes.

What is the lead time and warranty for POLYC triple roller mills?

Standard PTM models are delivered in 30-45 days from drawing confirmation. Every unit is backed by a 3-Year Global Warranty covering the main structural frame, drive gearboxes, and electric motors.