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TECNOLOGIES - Coggle Diagram

- - - - We put a tubular-shaped piece of plastic into a hollow mould which has the same shape as the oblect that we want to make
      - We close the mould and blow pressurised air into it, so that the plastic adheres to the sides of the mould and takes its shape
      - When the object is cold, we remove it from the mould
      - Used to form: hollow oblects, for example bottles and flasks
    - - The outer part of the cavity mould, shaped the same, is closed to compress the material inside
      - The plastic adapts to the shape of the cavity between the two parts of the mould
      - We put thermostable plastic into the base of a cavity mould
      - We extract the oblect when the plastic has cooled and solidified
      - Used to form: different types of containers, machine bodywork and electrical appliances
    - - When the material has cooled and solidified, we extract tt from the mould
      - We inject melted thermoplastic into a mould
      - Used to form: domesttc utensils such as buckets and contatners
- - - - are obtained directly from raw vegetable matenals
      - for example latex
    - - are made from compounds extracted from
        petroleum, natural gas and carbon
    - - During the manufacturing process, we can add matenals such as fibreglass, textile fibres, paper, silica and sawduct to reduce
        production costs, and to develop certain characteristics
      - We can incorporate chemrcal additives to increase flexlbdity and to strengthen the polymers, and we can add pigments to give colour to the plasucs.
  - - - acoustic
      - electrical
      - mechanical
      - thermal
      - other: low, density, tmpermeabihty
    - - Mechanical recycling
        
        Separation and crushing: separate the plastics according to
        type and then crushing
        
        Floating: wash the plastics and then dry them by centrtfugal
        force
        
        Agglutination: compacted and then incorporated
        into other matenals
        
        Extrusion: melt the matenal and then tt's extruded
        
        Pelletising: filaments are then reduced to granules
      - Energetic recycling
        
        we can incinerate plastics and the energy that
        is produced is used tn industry, for heating or producing electricty
      - Chemical recycling
        
        We apply chemical processes to make new matenals from the ongtnal components of plasuc residues
      - are not yet biodegradable
        
        plastics that decompose on contact with certain bactena and
        biological agents
        
        plastic that disorve in hot or cold water
- - - - Mixing
      - Moldelling
      - Preparig the clay
      - Drying
      - Backing
      - Glazing and enamelling
    - - It's soft, porous, resistant to high temperatures and chemically isnert.
      - It has many different. colours; it's abundant in nature and very versatile.
      - Clay is a fine-grained earth composed of aluminium silicates and other. Clay is a fine-grained earth composed of aluminium silicates and other
    - - Structural ceramics
      - whiteware ceramics
- - - - Tool that makes holes in plastics
      - Consistis of unserting a long, thin, round and threaded piece of metal mto the head of the machine that revolves at higth speed for cuting holes
    - - Used to finish the surfaces and edges of hard matenals
      - A rasp has an even rougher surface, covered with "teeth"
      - A file has a rough surface
      - Used to finish the surfaces and edges of soft materials
    - - Fretsaw
      - Jig saw
      - steel bit
      - Power press
      - Scissors
      - Hot metal thread trimmer
      - Cutter
- - - - Standard screw
        
        Used to fasten two obiects
        
        Holes must be drilled first before the screw is inserted
      - Double ended screw
        
        Each end of the screw can be inserted into one of a Each end of the screw can be inserted into one of a pair of object.
      - Nut and bolt
        
        Used to fasten two objets together
        
        Nut used to tighten the bolt
  - - - acrylic cement (liquid, used mainly with PVC and polystyrene)
      - ontact adhesives (liquid, work instantly after appiymg to
        both surfaces, used with all types of plastic)
      - resins with two components (liquid, high water resistance)
    - - Joining thermoplastics using heat and preasure
- - - - linen
        
        naturally
        
        elastic and flexible
        
        from the flax plant
        
        good thermal conductor
      - hemp
        
        extracted from a herbaceous plant
        
        very strong
      - cotton
        
        elastic and flexible
        
        resistant to acids
        
        naturally
        
        comes for one plant
    - - silk
        
        highly resistant and elastic
        
        good thermal and electricaln insulator
      - metals
        
        the reads of gold, sdver and coppe
        
        used to make colth
      - asbestos
        
        fibrous mineral
        
        fireproof
        
        fire-resistants
      - wool
        
        from sheep
        
        very elastic
        
        excelent termal insulator
        
        resistan to acids