2º 2º ESO ESO
TECHNOLOGY TECHNOLOGY IES IES Río Río Cabe Cabe Covadonga Covadonga Yugueros Yugueros Valbuena Valbuena
Technical Technical material material
Any Any material material used used to to construct construct an an object object
We We can can classify classify materials materials in in the the following following groups: groups: PLASTIC PLASTIC
METAL METAL
WOOD WOOD MADERA MADERA
TEXTILES TEXTILES TEXTILES TEXTILES
METAL METAL
CERAMIC CERAMIC MATERIALS MATERIALS MATERIALES MATERIALES CERÁMICOS CERÁMICOS
PLÁSTICO PLÁSTICO
STONE STONE MATERIALS MATERIALS MATERIALES MATERIALES PÉTREOS PÉTREOS
Classify the following materials into the correct group and state whether they are natural or processed:
Lycra
steel
silk
latex
Brass
Slate
Cork
Pine
Brick
Plaster
Sand
Paper
Oak
Plywood
Gold
PVC
Wood is a raw vegetable material
Wood comes from
of Trunks and branches
Renewable Wood
Abundant Has excellent technical characteristics
Technical characteristics of Wood Density Density
Hardness Hardness
Wood is a light material
Wood is a hard
Toughness Toughness Wood is a tough
it floats
But this depends on the type of wood
Technical characteristics of Wood Thermal Thermal and and electric electric insulation insulation Wood is a good thermal and electric insulator
Mechanical Mechanical resistance resistance Wood has a good mechanical resistance against
Traction
Compression
Aesthetic Aesthetic characteristics characteristics Pleasing to the senses by smell, color and softness.
Bending Grain Veta
1 Cutting / Felling
5
Sawing
2
3
Remove braches
6
Transport
Drying
4 Removing the bark
7
Planning
Natural wood WOOD
Prefabricated wood
Wood derivatives
Paper Cardboard Cork
SOFT WOOD HARD WOOD PLYWOOD
CHIPBOARD
They come from deciduous trees. Ă rboles de hoja caduca
These trees grow slowly Ă rboles de crecimiento lento
They can be in many different colors Pueden tener diferentes colores
These woods are very strong and resistant
It is difficult to work with them
Maple
Arce
Walnut
Nogal
Ash
Beech
Oak
Mahogany
Fresno
Roble
Cherry
Cerezo
Haya
Caoba
Teak
Teca
They come from evergreen, especially conifers Árboles de hoja perenne
These trees grow quickly Árboles de crecimiento rápido
This wood is usually light-colored Suelen ser de colores claros
These woods are light and resinous Ligeras y resinosas
It is easy to work with them
Pine Pino
Fir
Cedro
Alamo
Redwood Abeto
Cedar
Poplar
Secuoya
They come from wood fibers or chippings
Fibras o virutas de madera compressed and glued together
They are a lot of different sizes and finishes They are not attacked by parasites They are cheaper than natural woods It is easy to work with them
Plywood
Thin sheets of wood glued together and compressed
Contrachapado These wood layers are laid in alternating direction. Always an odd number of wood layers.
Ver +
Chipboard Aglomerado
Made with wood chippings glued together and compressed
Paper Wood is pulped and mixed with water and chemical products to make cellulose paste
This is compressed and rolled out by a machine until it becomes a sheet of paper
Cardboard It is made by compressing several layers of paper while it is wet to thicken it and produce a heavier texture.
Cork Cork is obtained from the bark of the cork oak
Reeds Ca単a
Wicker Mimbre
Esparto Esparto