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Plastics - Coggle Diagram
Plastics
1
Plastic has a big part in our daily live. We all know that is used for packing or making containers.
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1.2- Plastic properties
Mechanical: malleability, ductility, mechanical resistance
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Other properties: low density, impermeability
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3-Formation techniques:
3.1- Extrusion
1.
We put thermoplastic, in granular form, into a previously heated cylinder.
2.
We apply pressure by means of a large, rotating screw, which forces the melted material out, through a feeder system.
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Finally, we collect the pieces of plastic through a feeder system.
3.2- Lamination
Thermoplastic produced by the extusion method i passed through a series of hot cylinders to produce sheets of vaying thickness. With this technique, we can produce different finishes, for example, glossy, matt or textured. This depends on the outer coating applied by the final cylinder.
3.3- Vacuum forming
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4.
We leave the mould to cool, then remove the object.
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3.
We extact the air bellow the sheer so that the plastic is pulled against the inside walls of the shaped mould, and the desired from is created
3.4- Moulding
Compression
1.
We put thermostable plastic, which can be in ranular form, into the base of a cavity mould.
2.
The outer part of the cavity mould, shaped he same, is closed to compress the material inside. We then heat it and it becomes soft and malleable.
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Blow
2.
We close the mould and blow pressuried air into it, so that the plastic adheres to the sides of the mould and takes the mould.
3.
When the object is cold, we remove it from the mould.
1.
We put a tubular-shaped piece of plasic into a hollow mould which has the same shape as the object that we want to make.
Injection
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2.
When the material has cooled and solidifield, we extract it from the mould.
