What is Manufacturing?

Material Processing In what ways can we change materials? Introduction to Material Processing Essential Questions: Identify manufacturing processes as primary and secondary List and discuss major steps in manufacturing processes Define secondary and primary processes Material Processing Material processing - changing the size, shape, and look of materials to fit human needs. Changing the form of materials take 3 steps: Obtaining natural resources Producing industrial materials Making finished products Look around the room what do you see

that has changed from its original state to make a product? Obtaining Resources Methods to obtain resources: Mining digging the material from the earth my means of hole or tunnel Drilling pumping material from below the earths surface through a narrow shaft Harvesting cutting a mature, renewable resource from the land Primary Processing Primary processing methods (1st step in changing the form of materials):

Thermal using heat to change the properties of materials. Hot ores make a chemical reaction that separates metals from impurities. Mechanical materials are cut or crushed. Trees are cut into lumber, veneer, and chips. Rocks are crushed into gravel. They use mechanical force to change the resource. Chemical use chemical reactions to refine raw materials. Plastics formed by chemical reactions and simple compounds are combined to form complex polymer chains called plastics. Primary Processes Thermal Steel making Cooper smelting Zinc smelting

Lead smelting Chemical Aluminum refining Polymer formation Gold refining Papermaking Leather tanning Mechanic Lumber manufacture al Plywood manufacture Particleboard making Rock crushing Secondary Processing Secondary processing secondary processes produce finished products. Leather is made into shoes Lumber is made into a furniture and houses Types of secondary processes: Casting and molding pouring or forcing liquid material into a mold. The material becomes solid and is removed.

Forming using force to cause a material to permanently shape. A die, mold, or roll is used to shape the material. Separating changing a materials size and shape by removing excess material. The materials is cut or sheared in the process. Conditioning using heat , mechanical force, or chemical action to change the internal properties of a material Assembling temporarily or permanently holding two or more parts together Finishing Protecting or improving the appearance of the surface of a material Summary Raw Materials es s s ce o r ry P a m Pri Are obtained by

Mining Drilling Harvesting And are converted by Thermal Processes Chemical Processes Mechanical Proc. into Industrial Goods es s s ce o r P y r da

n o c Se Which are changed by Casting and Molding Separating Conditioning Forming Assembling Finishing into Finished Goods

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