Please enable JavaScript.
Coggle requires JavaScript to display documents.
Plastics - Coggle Diagram
Plastics
-
3 Formation technique
3.1. Extrusion
- We put thermoplastic,in granular form, Into a previously heated cylinder
- We apply pressure by means of a large, rotattng screw, whtch forces the melted matenal out, through a nuzzle.
- We cool the shaped material slowly In a refngerated water bath until lt's solid
- Finally,we collect the pieces of plastic through a feeder system.
-
3.2. Lamination
Thermoplastic produced by the extrusion method ls passed through a senes of hot cylinders to produce sheets of varying thickness
-
3.3. Vacuum forming
- We put thermoplasttc into a mould.
- We then use a heater to heat the mould and soften the plastic
- We extract the air below the sheet so that the plastic ts pulled against the instde walls of the shaped mould, and the desired form ts created
- We leave the mould to cool, then remove the obiect
-
3.4. Moulding
injection
- We inject melted thermoplastic into a mould
- When the material has cooled and solidified, we extract tt from the mould
-
compression.
- 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.
-
blow moulding
- We put thermostable plasic which can be in granular form, into the base of a cavity mould.
- The outer part of the cavity
mould, shaped the same, is closed to compress the material inside. We then heat it and it becomes soft and maleable
- The plastic adapts to the shape of the cavity between the two parts of the mould
- We extract the oblect when the plastic has cooled and solidified
-
-
-
-
-
We use plastics for makmg containers and packaging. But we also use plastics in many economic and industnal sectors, for example: telecommunications, transport, construction, medccine, agriculture and Information technology. Plastics are materials formed by polymers. The polymers in plastics are made from long chains of carbon atoms.
