TECHNOLOGICAL MATERIALS, TOOLS AND WOOD

TECHNOLOGICAL MATERIALS, TOOLS AND WOOD

1. RAW MATERIALS

   • DEFINITION: Products extract directly from nature.
   • PROCESSED MATERIALS
     • ARTIFICIAL
     • SYNTHETIC

2. PROPERTIES OF MATERIALS

   • MECHANICAL hardness resistance toughness brittleness elasticity plasticity
   • THERMAL expansion thermal conductivity
   • ENVIRONMENTAL toxicity recyclability hazard biodegradability

3. TOOLS

   • Tools for manual labor
   • machine tools

4. WOOD

   • DEFINITION: Fibrous material that trees are made of. It is made up of two main substances: cellulose and lignin
   • TYPES OF WOOD
     • non-resinous
     • resinous
   • PROPERTIES OF WOOD hardness good insulator flexibility not dense and resistance higroscopicity conducts sound splitability
   • FORMS OF WOOD
     • Natural
     • Prefabricated plywood chipboard fireboard
   • WOOD WORKING TOOLS
     • CUTTING saws
     • IMPACT hammers
     • ASSEMBLY spanners screwdrivers
     • SHAVING AND DRILLING TOOLS

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