An Introduction to Plastic Gears :: essays papers

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.

Bayfield Mud Company Essay

The Bayfield Mud Company has had some problems with their 50 pound bags of treating agents. They sent shipped some bags to Wet Land Drilling, Inc. that were found to be short-weight by approximately 5%. Wet Land first did their own research on how many bags were short and by how much. They randomly sampled 50 bags and found the average net weight to be 47.51 pounds. Wet Land then contacted Bayfield Mud about the situation. Bayfield gave a 5% credit to Wed-Land for the mistakes. But We Land not completely satisfied with the credit because the errors in the weight of the bags could impact their operations. Wet Land informed Bayfield Mud that if something like this happened again, they would take their business elsewhere. Bayfield’s response to all this was to expand a one-shift to a two-shift operation. Then, they had to expand to a three-shift operation. The additional night-shift bagging crew consisted of all new employee. The most emphasis was placed on increasing output. It was very likely that only occasionally were bags double checked on their weight. This is where the statistical control has come into place. The problem that Bayfield Mud faces includes the possibility of losing a customer in Wet Land, Inc. Another problem is putting out a product that is not acceptable. This problem could lead to more than just the loss of one customers, but perhaps an even greater amount. Based on the information given in the following charts and numbers, especially the control chat, it is obvious that the bag problem is out of control. Out of the 72 times that samples were taken, 14 were out of control. That is unacceptable for a company who intends on satisfying the customer and maintaining business. Something must be done in this company to correct the problem that has arisen. I think if the company still getting the more products but sacrifice the quality, the problem cannot not be solved actually. The company needs to ensure that the bag really does weigh 50 pounds. If they are going to offer a 50 pound product, then make it 50 pounds. It seems that the times that most of the bags are less than 50 pounds are around the nighttime shifts. Also, the times that it seems more bags are over 50 pounds are during the daytime shifts. They need to develop a y to ensure the accuracy of weighing the bags. Whatever they would  implement would have to increase quality, while not impacting the output numbers. There is a large demand for their product, so they must be able to meet the demand. And Bayfield needs to change their strategy or even do an entire makeover of their management team in order to get a better way for developing. Feng Bing (Yvonne) Student ID: 11-613222

Chapter 5 Of The Windows Internals Textbook - 1076 Words

Windows Internals, Part 1, 6th ed, Chapter 5 Chapter 5 of the Windows Internals textbook written by Mark Russinovich, David Solomon and Alex Ionescu covers Windows processes, threads, and jobs. This chapter goes over how processes are managed, describes the kernel mode and user mode, and process blocks. One of the topics I am covering for my final is the similarities and differences between processes and threads in Windows and FreeBSD so this source will help provide information about the properties of threads, processes and jobs in Windows and how they are managed. Windows Internals, Part 2, 6th ed, Chapter 8 Chapter 8 of the Windows Internals textbook written by Mark Russinovich, David Solomon and Alex Ionescu covers the Windows I/O system. This chapter goes over device drivers, I/O system components and features, and Plug and Play. One of the topics I am covering for my final is the similarities and differences between the Windows and FreeBSD I/O system so this chapter will assist me in explaining how the I/O system in Windows operates and unique factors that Windows has when it comes to I/O. Windows Internals, Part 2, 6th ed, Chapter 10 Chapter 10 of the Windows Internals textbook written by Mark Russinovich, David Solomon and Alex Ionescu covers Windows memory management. This chapter goes over virtual address space, copy-on-page writing, and paging. One of the topics I am covering for my final is the similarities and differences between memory management in WindowsShow MoreRelatedMgmt 6355 Final Questions1638 Words   |  7 PagesCHAPTER 13 1. | |    |   Imagine comparing a manufacturing operation using regular lot-sizing and the same operation with a Kanban/lean production approach. 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