Materials: Wood

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