Sökning: "mould filling"
Visar resultat 6 - 10 av 27 avhandlingar innehållade orden mould filling.
6. Computation of Thermal Development in Injection Mould Filling, based on the Distance Model
Sammanfattning : The heat transfer in the filling phase of injection moulding is studied, based on Gunnar Aronsson’s distance model for flow expansion ([Aronsson], 1996).The choice of a thermoplastic materials model is motivated by general physical properties, admitting temperature and pressure dependence. LÄS MER
7. On Some Positive Effects of the Swirl on Fluid Flow and Heat Transfer During Mould Filling
Sammanfattning : .... LÄS MER
8. On Defect Generation and the Appearance of Injection-Moulded Polymers
Sammanfattning : This thesis addresses the generation of some important manufacturing defects associated with intrinsic limitations of the injection moulding process. These include bulk-surface structural discontinuities, particularly air traps and welds, bulk-surface compositional inhomogeneities and gloss and colour variations. LÄS MER
9. Analysis of heat transfer and fluid flow in the resin transfer moulding process
Sammanfattning : This thesis contains an analysis of fluid flow and heat transfer problems in the resin transfer moulding (RTM) process for manufacturing of polymer based fibre composites and it consists of five separate papers. The permeability of unidirectional fabrics, that are often used in advanced composites, is considered in Paper A and a theory for the permeability dependence on the micro geometry is developed. LÄS MER
10. Void formation and transport in manufacturing of polymer composites
Sammanfattning : In this thesis void formation and removal during the Resin Transfer Moulding process are considered. The problem is examined by doing real moulding as well as mouldings under microscope, model experiment and analytical computations. The materials utilised are in most cases glass fibre reinforcements and vinylester resins. LÄS MER