plastic injection moulding

1. OBJECTIVE
 Study and calculate Reynolds number during fluid flow
 Study how the type of flow affect the final product during the plastic injection
moulding process.
 Determine the most suitable flow type to conduct this process and the time
duration for the whole process.
SCOPE
Injection moulding is a heat transfer process. We inject a molten liquid into a metal
mould and transfer the heat into the metal, where it is transferred into the cooling
media.Plastic injection moulding is the most important plastic production method. It
is also the most complex processes due to the many delicate adjustments. The flow of
liquid during the process may affect the final quality of the product. So, this
experiment is to determine the initial process parameter setting for the injection
moulding process. Reynolds numbers have been described as three different
ranges: Laminar – where liquids flow in layers, Turbulent – where liquids tumble
over themselves, and Transitional – a boundary range with a mixture of Laminar and
Turbulent flows in one stream of fluid.