jueves, 22 de enero de 2015

STONE AND CERAMIC MATERIALS

STONE: marble, granite, slate.
STONE BINDERS: plaster, cement, mortar, concrete.
CERAMICS: Baked clay, earthenware, heat resistant material, stoneware, porcelain.
GLASS
            - Shaping techniques: mould blowing, float glass making and lamination

FABRIC MATERIALS

Fabric materials can be natural or synthetic:

Natural:
- Vegetable origin: cotton, linen, hemp.
- Animal origin: wool, silk.
- Mineral origin: asbestos, metals.

Synthetic:
Nylon, polyester, rayon.

miércoles, 17 de diciembre de 2014

PLASTIC. CLASSIFICATION


There are two main types of plastics and these are named Thermoplastics and Thermosetting Plastics.

Thermoplastics are made up of lines of molecules with few cross linkages. This allows them to soften when heated and to be bent into a variety of shapes and forms. They become stiff and solid again when cold. This process can be repeated many times. The bond between the molecules is weak and become weaker when reheated, allowing reshaping. Thermoplastics tend to be composed of 'long chain monomers. They can be recycled.


Thermosetting Plastics are made up of lines of molecules which are heavily cross linked. It creates a rigid molecular structure. They may be heated the first time and shaped but they become permanently stiff and solid. They cannot be reshaped again. The molecules of these plastics are cross linked in three dimensions and this is why they cannot be reshaped or recycled


PLASTICS

                                    DEFINITION OF PLASTIC

Plastics are man-made materials. Plastics have taken the place of traditional materials like woods and metals.

Plastics differ from other materials largely because of the size of their molecules. Most materials have molecules made up of less than 300 atoms, plastics contain thousands of atoms. We call them Macromolecules.

Some plastics are derived from natural substances such as animals, insects and plants but most are man-made. These are named Synthetic Plastics.
The first plastic based on a synthetic polymer was made from phenol and formaldehyde, with the first viable and cheap synthesis methods invented by Leo Hendrik Baekeland in 1909, the product being known as Bakelite.
Most synthetic plastics come from crude oil but coal and natural gas is also used. 

Monomers are chemical substances consisting of a single molecule. Thousands of these are linked together in a process called Polymerisation to form new compounds called Polymers. They are composed of organic condensation or addition polymers and may contain other substances to improve performance or economics. The vast majority of plastics are composed of polymers of carbon and hydrogen alone or with oxygen, nitrogen, chlorine or sulfur.

lunes, 15 de diciembre de 2014

UNIT 3. MATERIALS. VOCABULARY




A
Ash
Aluminium
Ash
B
Birch
B eech
Branch
Bark
Broadleaf
Bronze
C
Chesnut
Copper
Cotton
Cork
D
Deciduous tree
E
Elm
Evergreen tree

F
Fir
G
Growth  rings
Gold
Glass
H
Heartwood
Hardwood
I
Iron
L
Leaf
Leaves
Leather
M
Metal
N
Needle
O
Oak
P
Pine
Poplar
Petroleum
Plastic
R
Roots 
Rubber
S
Stem
Seed
Steel
Sapwood
Softwood
Sap
Silver
Stone
Silk
T
Timber
Tree
Trunk
W
Wood
Wooden
Walnut
Wool






lunes, 20 de octubre de 2014

VOCABULARY EXAM TECHNICAL DRAWING

1. TRANSLATE INTO ENGLISH

1. PERPENDICULAR:PERPENDICULAR
2RADIO: RADIUS
3. PLANTILLA: STENCIL
4. HIPOTENUSA: HYPOTENUSE
5. BOCETO: SKETCH
6. CROQUIS: OUTLINE
7. MEDIDAS: MEASUREMENTS
8. SCALE: ESCALA
9. AMPLIAR: ENLARGED
10. SCALIMETRO: SCALE RULER
11.PERFIL DERECHO: RIGHT SIDE
12. ALZADO: FRONT VIEW
13.PLANTA: TOP VIEW
14. PELIGROSO: DANGEROUS
15.SEÑAL: SIGN
16.FORMA: SHAPE
17.TAMAÑO: SIZE
18. TRANSPORTADOR DE ÁNGULOS: PROTRACTOR
19. DIBUJO TECNICO: TECHNICAL DRAWING

20. CINTURÓN DE SEGURIDAD: SAFETY BELT

viernes, 19 de septiembre de 2014

BASIC TERMINOLOGY IN TECHNOLOGY

Technology
Practical use of knowledge, extend abilities, satisfy needs /wants & solve problems.
Design
The process of creating things by planning.
Innovation
The process of improving and changing a technology that already exists.
Invention
The process of designing new products.
Criteria
In the design process, things that the product must do or include.
Brainstorming
Group members suggest ideas out loud as they think of them.
Prototype
A working model.
An Engineer
Uses knowledge of science, math & technology to solve technical design problems.
What Technology Does:
Transforms resources into products and services and solves problems.

Units of measure

UNITS OF MEASURE CHART

METRIC UNIThttp://www.abcteach.com/free/m/measurement_chart.pdf

miércoles, 23 de abril de 2014

TIDAL ENERGY


METALLIC MATERIALS


1. TRANSLATE INTO ENGLISH

Aleación: Alloy
Hierro: Iron
Cobre: Copper
Cinc: Zinc
Plomo: Plumb
Estaño: Tin
Aluminio: Aluminium
Mena: Ore
Ganga: Slag
Acero: Steel
Cromo: Chrome
Níquel: Nickel
Arrabio: Cast Iron
Alto horno: Blast Furnace
Fundición: Casting
Latón: Brast
Bronce: Bronze
Alpaca: Alpaca
Titanio: Titanium
Magnesio: Magnesium
Oro: Gold
Plata: Silver
Platino: Platinium