Product Design notes & work
Thursday 29 September 2011
Monday 12 September 2011
Moulding of plastics
INJECTION MOULDING
Injection moulding uses small granules that are poured into a hopper. They are then carried by an Archimedes screw, through heating pads into a split mould.
![](http://open.jorum.ac.uk/xmlui/bitstream/handle/123456789/997/Items/T173_2_024i.jpg)
COMPRESSION MOULDING
Compression moulding also uses heat in its process however in this process two shapes are pushed together with the mould inside of it and forms a specific shape.
![](http://alexpb.com/notes/wp-content/uploads/2007/12/compression_molding.png)
ROTATIONAL MOULDING
The process of rotation uses centrifugal froce to push molten plastic powder to ther outside of a chosen shape. these shapes are hollow and are usually products such as childrens toys.
Injection moulding uses small granules that are poured into a hopper. They are then carried by an Archimedes screw, through heating pads into a split mould.
![](http://open.jorum.ac.uk/xmlui/bitstream/handle/123456789/997/Items/T173_2_024i.jpg)
COMPRESSION MOULDING
Compression moulding also uses heat in its process however in this process two shapes are pushed together with the mould inside of it and forms a specific shape.
![](http://alexpb.com/notes/wp-content/uploads/2007/12/compression_molding.png)
ROTATIONAL MOULDING
The process of rotation uses centrifugal froce to push molten plastic powder to ther outside of a chosen shape. these shapes are hollow and are usually products such as childrens toys.
![](http://www.asia.ru/images/target/photo/51242633/Rotational_Moulding.jpg)
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