Roller Mill, AKA Reduction Mills Essay

Roller Mill, AKA Reduction Mills Essay

Length: 1282 words (3.7 double-spaced pages)

Rating: Strong Essays

Open Document

Essay Preview

ROLLER MILL
Roller mills are also known as reduction mills. Roller mills are mills that use cylindrical rollers, either in opposing pairs or against flat plates, to crush or grind various materials, such as grain, ore, gravel, plastic, and others.
Roller mills consist of two to five smooth five rollers operating at different speeds, thus the size reduction is effected by the a combination of compression and shearing action.
The particle size reduction is mainly occurred by the pressure between the two or more rollers present in the mill.
By the attrition of the rollers the reduction in the size takes place and shows free flow properties.



Different roller mill


HISTORY
The invention of the rolling mill is attributed from Leonardo da Vinci. Earliest rolling mills were slitting mills, which were introduced from what is now Belgium to England in 1590. These passed flat bars between rolls to form a plate of iron, which was then passed between grooved rolls (slitters) to produce rods of iron. Later this began to be rerolled and tinned to make tinplate.
The slitting mill was adapted to producing hoops (for barrels) and iron with a half-round or other sections by means that were the subject of two patents in 1679.
Some of the earliest literature on rolling mills can be traced back to Christopher Polhem in 1761 in Patriotista Testamente, where he mentions History of the is wanted to tilt only one bar with a hammer.
Thomas Blockley of England in 1759 for the polishing and rolling of metals got the pantent. Another patent was granted in 1766 to Richard Ford of England for the first tandem mill. A tandem mill is one in which the metal is rolled in successive stands, Ford’s tandem mill was for hot rolling of wire rods.
Rolling mills...


... middle of paper ...


...
DISADVANTAGES:
 If the temperature of the work piece is not uniform the flow of the material will occur more in the warmer parts and less in the cooler.
 If the temperature difference is great enough cracking and tearing can occur.
 Roll deflection
 Maintaining a uniform gap between the rolls is difficult because the rolls deflect under the load required to deform the work piece.
 Little or no effect on fiber materials.




REFERENCES:
1. Lieberman, Herbert A, Lachman, Leon (2009), Industrial pharmacy: Pharmaceutical dosage form-milling. Banglore, Pune. ISBN: 978-81-239-1679-8.
2. Mehta RM, Pharmaceutics-I: Size reduction (1996), Page no: 90.
3. http://www.feedmachinery.com/glossary/equipment/roller_mills.
4. http://en.wikipedia.org/wiki/Rolling_(metalworking).
5. http://www.directindustry.com/prod/neuhaus-neotec/roller-mills-pharmaceutical-industry-3759.



Need Writing Help?

Get feedback on grammar, clarity, concision and logic instantly.

Check your paper »

Roller Coasters And The Roller Coaster Essay

- Imagine getting on a roller coaster. The roller coaster is starting up. It’s slowly reaching the top of the track. Suddenly the roller coaster takes off and is now reaching speeds up to 100 miles per hour. Now imagine the roller coaster is having an error. The roller coaster is breaking down. Innocent lives are getting injured, or worse. Roller coasters now are bigger, faster, and taller. However, roller coasters are now more dangerous than ever before. Roller coasters can cause a lot of pain to people....   [tags: Roller coaster, Amusement park, Cedar Point]

Strong Essays
1427 words (4.1 pages)

A History of Roller Coasters Essays

- Roller coasters are one of the most popular rides when you go to an amusement park with everybody in your family. Why are they so scary for some people while for others it is just another adrenaline rush. Roller Coasters are one of the most complicated rides to build and to actually ride. There are some people who just have fun building something to have a quick adrenaline rush before going to work. Roller coasters have some of the most interesting design and history; they have become one of the world’s famous rides at every amusement park....   [tags: Roller Coasters,]

Strong Essays
2438 words (7 pages)

The World Of Roller Coasters Essay

- Did you know that almost all roller coasters only rely on Earth’s gravity to get the cars down the track. Roller coasters are centered all on physics and I will hopefully teach you some things, big or small about them today. In this essay we will be exploring the world of roller coasters. Some of the topics we will cover will range from the history, to the principles that allow the cars to continue throughout the length of the track, and the general physics surrounding roller coasters. The history of roller coasters is a really cool one if you ask me....   [tags: Roller coaster, Steel roller coaster]

Strong Essays
1944 words (5.6 pages)

Essay on The Roller Coaster At California 's Great America

- As the line for the Grizzly roller coaster at California’s Great America expanded,the loud screaming noises from people above us as they ride the roller coaster at tremendous fast speed. The big tv screen that displayed hilarious pictures of people’s faces as they approached the first drop on the roller coaster.Children legs were shaking uncontrollably as if they were on a cold winter day when they deboarded the roller coaster.Instantly I realized that I am going to encounter my fear of riding a roller coaster with one of my best friends,Stacey, and my sister,Jenny.I had butterflies in my stomach as my heartbeats accelerated as I approach near the seating of the roller coaster.I have waited...   [tags: Roller coaster, Wooden roller coaster]

Strong Essays
966 words (2.8 pages)

Textile Mills: Their Innovation and Impact on Society Essay

- When our group found out that this year’s History Day topic was “impact and innovation” we had an epiphany to exemplify what impacted people’s lives the most, so we concluded to do our on project on the innovation in the textile industry and impact of the textile mills. The textile mills provided people with a cheap source of cloth that had an impact on every person’s lives during the eighteenth and nineteenth centuries. In order to get our information on the innovation and impact of the textile mills, as a group we gathered information from various places and did extensive research on our topic....   [tags: textile mills, history, ]

Strong Essays
502 words (1.4 pages)

The History of Roller Coasters Essay

- The History of Roller Coasters Everyone remembers their first ride on a roller coaster, an experience of terror, joy and excitement, as you tower over amusement parks going through curves and loops. From wooden wonders and steel coasters to twisters and corkscrews, the great rides began with the Russian ice slides in the 17th century and have developed into the ultimate thrill machines of today. The origins of the roller coaster will probably never be a settled issue, historians and coaster enthusiasts could argue where it all began (Harris)....   [tags: Roller Coasters Amusement Parks Essays]

Strong Essays
3751 words (10.7 pages)

Essay about Roller Coasters

- Roller Coasters Roller coasters have come to be one of American’s favorite pastimes. Amusement parks are more popular than ever thanks to the exciting, fast-pace, “scream machine” rides known as roller coasters. Though many people may not know, roller coasters are entirely based upon science, from the speed of the cars to the safety of the ride. For one to understand the thrills as well as fears one experiences on a roller coaster, one must first understand the most basic component of these rides, the physics....   [tags: Roller Coasters]

Strong Essays
1676 words (4.8 pages)

Physics of Roller Coasters Essay

- Roller coasters are driven almost entirely by inertial, gravitational and centripetal forces. Amusement parks keep building faster and more complex roller coasters, but the fundamental principles at work remain the same. A roller coaster is like train. It consists of a series of connected cars that move on tracks. But unlike a passenger train, a roller coaster has no engine or power source of its own. For most of the ride, a roller coaster is moved only by the forces of inertia and gravity....   [tags: Roller Coaster Theme Park Amusement]

Strong Essays
1756 words (5 pages)

Marx And Mills Essay

- Marx And Mills John Stuart Mill suggests that a person’s ethical decision-making process should be based solely upon the amount of happiness that the person can receive. Although Mill fully justifies himself, his approach lacks certain criteria for which happiness can be considered. Happiness should be judged, not only by pleasure, but by pain as well. This paper will examine Mill’s position on happiness, and the reasoning behind it. Showing where there are agreements and where there are disagreements will critique the theory of Utilitarianism....   [tags: Marx Mills Philosophy Philosophical Essays]

Strong Essays
1189 words (3.4 pages)

Roller Coaster Physics Essays

- The very first “roller coasters” were created in Russia in the 1600’s, and were nothing like the typical roller coaster that comes to mind today. People rode down steep ice slides on large sleds made from either wood or ice that were slowed with sand at the end of the ride. These sleds required skill to navigate down the slides, and accidents were frequent. A Frenchman tried to cash in on the popularity of the Russian ice slides by building one in France, but the warm climate quickly ended his attempts with ice....   [tags: physics roller coasters amusement theme park]

Strong Essays
1832 words (5.2 pages)