Three Roll Mill Electronic Models

When consistency and fineness matter most

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Highlights


The Three Roll Mill Electronic models were specifically designed for manufacturers who need extraordinary precision and control of particle dispersion in small quantities. In applications that range from color blending in printing inks and cosmetics to nano-particle dispersion for electronics, these units provides a means of achieving extremely precise particle size reduction/dispersion in a remarkably reproducible format. The Electronic models are great for product development, pilot plant projects, and small production runs.

Unique Features


Unique Dual Mode Gap Control

  • TRM Electronic models allow you to control the gap between the rollers (and thus the dispersion qualities) in two modes:
    • Gap mode – A quantitative setting to a specific gap value (in microns)
    • Force mode – A quantitative setting to a specific line pressure in the gap (in Newtons/mm)
  • The gaps are continuously monitored and adjusted by the control system to maintain the pre-set value which also provides continuous, automatic roller alignment
  • The gaps can be independently set to simultaneously operate in either mode with independent monitoring and control in the mode selected
  • The operator can change the mode of gap control during operation

Electronic Features


Programmability and Scale-up

The three roll mill electronic control package has several levels of features.

  • Operational parameters can be stored in 99 discreet programs including sub-programs for products requiring multiple process runs
  • Parameters that can be set are roller speed and gap settings (in either mode)
  • The control system will default to last program run on the mill when the main power supply is turned on.
  • EXAKT DataLog software (optional) allows users to transmit real-time operating parameters to a PC via a RS 232/USB interface.
  • The operator control panel provides real-time operational displays in both operating modes that translate to larger volume production conditions (scale-up)
    • In gap mode setting, the user-defined gap setting and the actual force value are displayed
    • In force mode the user-defined force value and both the actual (corresponding) gap and force values are displayed

Safety


New Levels of Safety

  • All Three Roll Mill Electronic models meet or exceed the safety requirements specified in ANSI.
  • Cleaning mode – the mill defaults to the maximum gap spacing and minimum torque.
  • Reverse roller direction – once stopped by either the emergency stop system or during normal operation, the direction of the rollers can be reversed. Once activated, movement in the reverse direction is controlled in steps until the foreign object can be removed from between the rollers.
  • Emergency stop function – in the event of emergency stop activation, the rollers are automatically opened to the widest possible gap.

Roller Options


  • EXAKT 80EChrome-plated hardened steel
  • Aluminum oxide
  • Silicon carbide

All three roll mill models are equipped with the EXAKT universal scraper system. This system allows a cost-effective and rapid exchange of scraper knives. The steel, plastic and ceramic scraper knives offered by EXAKT can be easily substituted based on specific product requirements.

Components


  • Cooling and heating capability in the roller system
  • Stainless steel hopper
  • Universal scraper system
  • Splash tray to facilitate cleaning

Options


  • PFA Coating on scraper aprons and hoppers
  • EXAKT Datalog software
  • Pressurized heating/cooling of rollers (120 EH – 250 & 450)
  • Additional safety stops

Applications


  • Ceramics
  • Composites
  • Cosmetics
  • Dental Materials
  • Electronic Materials
  • Inks

Technical Specifications


Electronic SeriesEXAKT Superfine TRM Models

MODELS
80E
120EH-250
120EH-450
Throughput liters/hour (min. – max.)* 0.02 – 20 0.5 – 30 1-60
Roller diameter mm 80 120 120
Roller lenthmm 200 250 450
Roller speed ration
n1: n2: n3
9:3:1 9:3:1 9:3:1
Roller material chrome-plated
hardened steel
aluminum oxide
optional super finish available
silicon carbide
chrome-plated
hardened steel
aluminum oxide
optional super finish available
silicon carbide
chrome-plated
hardened steel
aluminum oxide
optional super finish available
silicon carbide
Universal scraper system (optional PFA coating) standard standard standard
Scraper knife material steel, plastics, aluminum oxide, zirconium oxide steel, plastics, aluminum oxide, zirconium oxide steel, plastics, aluminum oxide, zirconium oxide
Required power: 2 speed motor kW  N/A N/A N/A
Frequency converter Speed control** motor output kW 1.1 3 3
Rollers which can be cooled and heated up to 60 C standard standard standard
Solvent dispenser standard standard standard
Explosion protection N/A N/A N/A
Dimensions mm (width x depth x height, with scraper system and hopper) 720 x 550 x 550 870****
x 950 x 1320
1070****
x 950 x 1320
Weight kg. ca. 70 ca. 320 ca. 390
Power supply *** 3 x 200-240 V/60 Hz 3 x 200-240 V/60 Hz 3 x 200-240 V/60 Hz