Ep 19. Pistons and Chimneys

In season 4 episode 19 of 'How It's Made', viewers are taken on a fascinating journey into the manufacturing processes of pistons and chimneys. The episode begins with the production of pistons, which are crucial components of engines. Viewers are shown how the raw materials, predominantly aluminum and silicon, are melted and mixed with other alloys to create a material that is strong, durable, and resistant to high temperatures. The molten material is then poured into molds, which are specially designed to shape the liquid metal into the specific size and shape needed for the piston. The molds are cooled, and the pistons are released and undergo a series of finishing processes, including smoothing, polishing, and coating.

Next, the episode explores the manufacturing of chimneys, which are vital components of many homes and buildings. The process begins with the cutting of steel sheets into specific sizes and thicknesses. These sheets are then rolled and welded into a cylindrical shape, forming the body of the chimney. The chimney body is then fitted with various components, such as the damper, which regulates air flow, and the cap, which prevents rain and debris from entering the chimney. Once the components are in place, the chimney undergoes a series of finishing processes, such as sandblasting and painting, to make it aesthetically pleasing and resistant to the elements.

The episode concludes with a look at the applications of pistons and chimneys. Pistons are shown as part of various machines, including engines for cars, boats, and airplanes. Interestingly, viewers are presented with a comparison between diesel and gasoline engines, with a focus on how the different types of engines use pistons differently to achieve the power needed for their respective applications. Chimneys, on the other hand, are shown in various contexts, such as homes, factories, and power plants. The importance of chimneys in maintaining air quality and preventing damage to the environment is emphasized, especially with regards to the production of electricity through the burning of fossil fuels.

Overall, the episode is a fascinating exploration of two very different, yet equally important, components of modern society. By delving into the manufacturing processes of pistons and chimneys, viewers gain a greater appreciation for the complexity and sophistication of the technologies that power our world. From the raw materials to the finished product, the attention to detail and precision required to create these components is truly remarkable. And, by showcasing the many applications of pistons and chimneys, the episode highlights the essential roles that these technologies play in our daily lives.