An Introduction to Plastic Gears
As an employee of a world-class plastic gear manufacturer for many years, I see how this is an undeniably growing part of the gear industry. I hope to briefly describe how something seemingly simple as a plastic gear requires the culmination of many very state-of-the-art processes.
Within one word I’ll say that at every level precision is required. Initially, a gear engineer must design a gear that meets the design intent while remaining cognizant of all variables that result from using materials such as plastic. This engineer must design a gear electrode that will actually determine the form of the gear. This electrode is then burned into the mold cavity using a method commonly referred to as EDM or electrical discharge machining. It is essential that the gear electrode be cut identical to the finished gear tooth form. Some compensation is normally made for the shrinkage of plastic as well as the overburn that occurs during the EDM process. The gear engineer normally will alter the gear tooth geometry to relieve stress and strengthen the gear tooth form. This alteration is normally done at the base or root of the gear tooth and at the tip or peak of the tooth.
Next, a mold maker then will evaluate what the expected life of the gear program will be so that he can build a mold that is robust and capable producing the many millions of parts with the highest of accuracy. He will ensure that the plastic that will be entering the mold will travel along balanced pathway or runner system that will allow for consistent fill into each mold cavity. His tool for evaluating this flow is done through a computer model commonly referred to as mold flow analysis. He must be capable of understanding what makes a good mold as well as a good gear.
Once the mold is completed it is then set into an injection-molding machine. It is important in the precision gear molding industry that the molding unit has a highly controlled system in place to monitor the molding process. It is equally important during this process that there is a means by which all peripheral variables can be controlled. This is done utilizing a central processor, which will maintain balance on all settings for every parameter. Transducers relay all of their information into a central processor that will monitor and maintain this consistent process.
This article illustrates five major lessons a reader can learn from The Catcher in the Rye. Some of the lessons are about growing up and not being alone, which are two major themes in the novel. By including some universal lessons, this article is able to not only relate to children and adolescents, but also adults who are having the same troubles. Along with the lessons, the article illustrates some of Holden’s important qualities, such as his love for reading and his catchphrase, “phony.”
In the 1920’s the United States economy was booming, and a famous man by the man of Henry Ford came along and had an industry changing idea. He set up the first production line style for producing automobiles. Each assembly line worker had one or two specific tasks to complete on the cars that came through. The process began with a skeleton on the car, and as it went down the line from worker to worker it slowly gained more and more pieces finishing the automobile completely...
Eyewitness testimony is an important area of research in cognitive psychology and human memory. The use of eye-witness testimony is often a primary source of evidence used in the judicial system. When there is no evidence to apprehend the accused, eye-witness testimony becomes an effective tool in apprehending the culprit. Juries tend to pay close attention to eyewitness testimony and generally find it a reliable source of information even when research into this area has found that eyewitness testimony can sometimes be
Behind every product manufactured there are parts, fasteners, gloves, welds, holes that are drilled, and maybe a headache or two. These are all products that are sold and manufactured by the companies W.W. Grainger and Fastenal Company. Both of these companies are in the top ten in revenue for the industrial supply industry and I just so happen to work at one of them, that being Fastenal Co.
The Catcher in the Rye is narrated by Holden Caulfield, a sixteen year-old boy recuperating in a rest home from a nervous breakdown, some time in 1950. Holden tells the story of his last day at a school called Pencey Prep, and of his subsequent psychological meltdown in New York City. Holden has been expelled from Pencey for academic failure, and after an unpleasant evening with his self-satisfied roommate Stradlater and their pimply next-door neighbor Ackley, he decides to leave Pencey for good and spend a few days alone in New York City before returning to his parents' Manhattan apartment. In New York, he succumbs to increasing feelings of loneliness and desperation brought on by the hypocrisy and ugliness of the adult world; he feels increasingly tormented by the memory of his younger brother Allie's death, and his life is complicated by his burgeoning sexuality. He wants to see his sister Phoebe and his old girlfriend Jane Gallagher, but instead he spends his time with Sally Hayes, a shallow socialite Holden's age, and Carl Luce, a pretentious Columbia student Holden treats as a source of sexual knowledge Increasingly lonely, Holden finally decides to sneak back to his parents' apartment to talk to Phoebe. He borrows some money from her, then goes to stay with his former English teacher, Mr. Antolini. When he believes Mr. Antolini to be making a homosexual advance toward him, Holden leaves his apartment, and spends the rest of the night on a bench in Grand Central Station. The next day Holden experiences the worst phase of his nervous breakdown. He wanders the streets, looking at children and talking to Allie. He tries to leave New York forever and hitchhike west, but when Phoebe insists on going with him he relents, agreeing to go back home to protect his sister from the ugliness of the world. He takes her to the park, and watches her ride on the merry-go-round; he suddenly feels overwhelmed by an inexplicable, intense happiness. Holden concludes his story by refusing to talk about what happened after that, but he fills in the most important details: he went home, was sent to the rest home, and will attend a new school next year. He regrets telling his story to so many people; talking about it, he says, makes him miss everyone
Merton primarily focuses on the materialistic goals all Americans are exposed to regardless of their position in society. The structure of society puts enormous pressure on people thus generating deviance. It also emphasizes certain means to attain the goals. Anomie occurs when there’s a breakdown of social norms and they are no longer present in society. This is known as normlessness. Merton suggests that anomie is the strain in the individual when norms conflict with society. Under norm conditions, crime and deviance increases. Norms and values govern people. In every society, there are values, goals and aspirations that are taught to the members. There are two phases of social structure. The first being the agreed upon goals that all the members should have
However, mechanical engineers are involved in the design and production of these parts, not often distribution
Emily Dickinson was ahead of her time in the way she wrote her poems. The poems she wrote had much more intelligence and background that the common person could comprehend and understand. People of all ages and critics loved her writings and their meanings, but disliked her original, bold style. Many critics restyled her poetry to their liking and are often so popular are put in books alongside Dickinson’s original poetry (Tate 1). She mainly wrote on nature. She also wrote about domestic activity, industry and warfare, economy and law. “Her scenes sometime create natural or social scenes but are more likely to create psychological landscapes, generalized scenes, or allegorical scenes.” She uses real places and actions to convey a certain idea or emotion in her poem. She blends allegory and symbolism, which is the reason for the complication in her poems because allegory and symbolism contradict each other (Diehl 18, 19). Dickinson did not name most of her poems. She named twenty-four of her poems, of which twenty-one of the poems were sent to friends. She set off other people’s poetry titles with quotation marks, but only capitalized the first word in her titles. Many critics believe she did not title most of her poetry because she was not planning on publishing her work. As Socrates said, “the knowledge of things is not devised from names… no man would like to put himself or the education of his mind in the power of names”(Watts 130). Dickinson said that the speaker in all...
The Company has invested its big portion on 3D printing equipment’s. Since technology has a limited life span, Whales’ need to upgrade its innovation very frequently.
Merton that sees crime as a function of the conflict between people’s goals and the means available to obtain them. (Siegel, L. J., 2016). The theory states that society puts pressure on individuals to achieve socially accepted goals though they lack the means, this leads to strain which may lead the individuals to commit crimes. (Merton, Robert (1938). "Social Structure and Anomie". American Sociological Review. 3 (5): 672–682.) It is also believed that these strains can also lead to negative emotions like anger and frustration. These emotions cause pressure for the individual which can result in crime. Some individuals may use crime to reduce or escape from the strain or to lessen negative emotions. One example might be if an individual is unemployed for a long time, they may turn to crime such as theft or drug dealing for a source of income. They may also seek revenge from the person or company who fired them. There are several versions of strain theory and why some are most likely to lead to crime, why others increase crime and some strained individuals don’t turn to crime at
Advanced CNC fabrication tools and 3D printing machines have made notable improvements in the construction industry. The benefits of this new approach have been developed over many years to increase...
-sensorimotor - receiving, encoding and processing information about the object properties of the elements of the environment.
Frank was influenced to a life of the American Dream through the lavish life his father led and his mother truly being spokesperson for it. Moving her from France, during World War II to find a means of a better life. The life he grew up living was a picture perfect story of what the American Dream is. To grow up in money and be able to attend a private school in your youth. Franks
that make thousands of types of plastics. Ink pens, car parts and plastic bags are all made
Mechanical engineering is a type of engineering which applies principles of physics and material science for the purpose of analyzing, designing, manufacturing and maintaining of mechanical systems (Gorp, 2005). It is involved with the production and usage of mechanical power in the operation of various machines and tools. Mechanical engineering is considered to be the most diverse engineering and has its breadth derived from the need to design tools and manufacture products which range from small individual parts to large systems. Mechanical engineering, as thought of by scholars, is related to Aerospace engineering, Manufacturing and Mechanical engineering (Van et al, 2011).