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Material Processing

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.

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Material Processing

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  1. Material Processing In what ways can we change materials?

  2. 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

  3. 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?

  4. 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 earth’s surface through a narrow shaft • Harvesting – cutting a mature, renewable resource from the land

  5. 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 Processing

  6. 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 material’s 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

  7. Raw Materials Are obtained by Mining Harvesting Drilling And are converted by Chemical Processes Mechanical Proc. Thermal Processes into Industrial Goods Which are changed by Separating Forming Casting and Molding Conditioning Assembling Finishing into Finished Goods Summary Primary Processes Secondary Processes

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