Click to Visit Pharmapproach Marketplace Click to Visit Pharmapproach Marketplace Click to Visit Pharmapproach Marketplace
  • About Us
  • Contact Us
  • Advertise With Us
Sunday, January 24, 2021
Pharmapproach.com
  • Home
  • Post Categories
    • Pharmaceutical Technology
    • Clinical Pharmacy
    • Pharmaceutical Microbiology
    • Pharmacology
    • Pharmaceutics
    • Pharmacy Management
    • Pharma Companies
    • Articles
    • Pharmatips
    • Pharmaceutical Machines
  • Pharma MarketplaceNew!
Post Ads For Free
Pharmapproach.com
  • Home
  • Post Categories
    • Pharmaceutical Technology
    • Clinical Pharmacy
    • Pharmaceutical Microbiology
    • Pharmacology
    • Pharmaceutics
    • Pharmacy Management
    • Pharma Companies
    • Articles
    • Pharmatips
    • Pharmaceutical Machines
  • Pharma MarketplaceNew!
Post Ads For Free
Pharmapproach.com
No Result
View All Result

Roller Mill

by Pharmapproach
July 5, 2020
in Particle Size Reduction Equipment
0
1
SHARES
9.6k
VIEWS
Share on FacebookShare on Twitter

Roller mill is a form of compression mill that uses a single, double, or triple cylindrical heavy wheel mounted horizontally and rotated about their long axis either in opposing pairs or against flat plates, to crush or grind various materials. One of the rollers is run by a motor and the others are rotated by friction as the material is drawn through the gap between the rollers.

Roller mills use the process of stress (which is applied by the rotating wheels) and attrition in milling of solids in suspensions, pastes or ointments, and some solid materials. The rollers rotate at different speeds and the material is sheared as it passes through the gap.

To obtain the desired particles size, the following should be controlled;

  • The gap between the rollers
  • The speed differential between the rolls
  • Feed rate

imahe of a roller mill housing frame

The design of a roller mill differs depending upon its application and they are usually named according to the work they perform e.g;

  • Crackers – A mill used to crack grain or other types of friable materials.
  • Flakers – Mills used to flake grains or other materials
  • Grinders (Rollers mill grinders) – Roller mills that are used to grind in a feed mill.
  • Crimpers – Roller mills that crimp grains
  • Crimper – Crackers a roller mill that cracks and at the same time crimp grains.
  • Crumbler – A roller mill specially designed for breaking up pellets into smaller particles.

Two variants of roller mill are recognized and they are;

a. Multiple or corrugated rollers

b. Ribbed or saw-toothed rollers.

image of Fully Hydraulic Three Roller Mill

Contents

  • 1 Pharmaceutical uses of Roller Mill
  • 2 Advantages of Roller Mills   
  • 3 Disadvantages of Roller Mills
  • 4 References

Pharmaceutical uses of Roller Mill

1. It is used in the preparation of ointment; paste, creams, and other semi-solid preparations.

2. Roller mills are used for crushing seeds prior to extraction.

Advantages of Roller Mills   

1. Produce more uniform, fewer fines, and oversized particles when it comes to product quality.

2. Generates less heat (0 – 3 0C) unlike hammer mill that generates up to 10 0C

3. Less moisture loss

4. Better work environment due to low machine noises level

5. It is energy efficient/energy saving

6. Reducing working hazard due to dust generation from the milling material.

Disadvantages of Roller Mills

1. Not effective on fiber or two-dimensional products. Works best on easy to grind materials like corn, cereal grains, etc.

2. Additional operator inputs are required since the rolls need to be adjusted to suit grind requirements.

References

  • Michael E. Aulton, and Kevin Taylor (2013). Aulton’s Pharmaceutics: The Design and Manufacture of Medicines fourth edition. Elsevier Ltd, NY.
  • Sud Sushant and Kamath Archana (2013). Methods of Size Reduction and Factors Affecting Size Reduction in Pharmaceutics. International Research Journal of Pharmacy. 4(8): 57-64.

Tags: Milling Equipment
Previous Post

Pin Mill

Next Post

Vibration Mill

Related Posts

image of a vibration mill
Particle Size Reduction Equipment

Vibration Mill

July 5, 2020
image of a pin mill
Particle Size Reduction Equipment

Pin Mill

July 5, 2020
Picture of a Hammer mill
Particle Size Reduction Equipment

Hammer Mill

July 5, 2020
image of a fluid energy mill
Particle Size Reduction Equipment

Fluidized Energy Mill

July 5, 2020
image of edge-runner mill and end-runner mill
Particle Size Reduction Equipment

Edge-Runner Mills and End-Runner Mills

July 5, 2020
picture of a cutter mill
Particle Size Reduction Equipment

Cutter Mill

July 5, 2020

Leave a Reply Cancel reply

Your email address will not be published. Required fields are marked *

Post Flash

Pharmaceutical Companies in Nigeria

Techniques Available for Tablet Coating

World Health Organization (WHO) Country Offices and Contact Details

Elixir for Sourcing of Candidates and Retaining Them

Estimating the Financial Needs of a Business

Preformulation Studies: Solubility analysis

WHO Western Pacific Region Country Offices

Differences Between Hard Gelatin Capsules and Soft Gelatin Capsules

Regulations, Guidelines and Clinical Trials

Drugs, Chemical and Herbal Regulations
Drugs, Herbal, and Chemical Guidelines
Clinical Trials

Important Links

Drug Manufacturing Companies in Nigeria
National Agency for Food & Drugs Admin & Control
Pharmacists Council of Nigeria
Pharmaceutical Society of Nigeria
Journal of Pharmaceutical Development and Industrial Pharmacy
Job Opportunities for Pharmacists

Subscribe via Email

Enter your email address to subscribe to this blog and receive notifications of new posts by email.

Join 812 other subscribers

Submit Articles

Click to Submit Your Article

Archives

  • About Us
  • Advertise With Us
  • Terms and Conditions
  • Privacy Policy
  • Contact Us

© 2021 Pharmapproach Limited. All Rights Reserved .

No Result
View All Result
  • Home
  • Post Categories
    • Pharmaceutical Technology
    • Clinical Pharmacy
    • Pharmaceutical Microbiology
    • Pharmacology
    • Pharmaceutics
    • Pharmacy Management
    • Pharma Companies
    • Articles
    • Pharmatips
    • Pharmaceutical Machines
  • Pharma Marketplace

© 2021 Pharmapproach Limited. All Rights Reserved .

x
This website uses cookies. By continuing to use this website you are giving consent to cookies being used. Visit our Privacy and Cookie Policy.