Processing of Thermoplastic Composite Structures Gabriel Gumede Department of Mechanical Engineering Durban University of Technology November 2007.

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Presentation transcript:

Processing of Thermoplastic Composite Structures Gabriel Gumede Department of Mechanical Engineering Durban University of Technology November 2007

Slide 2 © CSIR Introduction What is Thermoplastic composite Thermoplastic:Deformable, melts to liquid and freezes to brittle glass state. Recyclable (remelted and remoulded). Composite:Material made from two or more materials with different physical or chemical properties and remain separate and distinct within the finished structure. Thermoplastic composite is a recyclable, reinforced plastic material. Polymeric composite application Automotive, aerospace, marine, civil construction, sports, and many others.

Slide 3 © CSIR Problem Statement

Slide 4 © CSIR Nanocomposites Vacuum Bagging

Slide 5 © CSIR Autoclaving Enhances composite bonding and curing. Resin Transfer Moulding

Slide 6 © CSIR Thermoforming

Slide 7 © CSIR Work already done Kunihiko Murayama - orietation control of short fibres in a - liquid matrix by loading a magnetic field. - Nickel coated graphite fibre - ultrasonic vibration Liu and Chen developed water- assisted injection moulding technology. Water penetrates into the core of the composite and pushes the material into the mould wall thereby aligning the fibres in the mould direction.

Slide 8 © CSIR Manufacturing Processes Pultrusion Extrusion moulding Compression moulding Injection moulding

Slide 9 © CSIR Pultrusion Process

Slide 10 © CSIR Modified Pultrusion/Extrusion Moulding Process creel Fibre spreader Heater rollers Impregnating tool With rollers chiller Pullers Winder

Slide 11 © CSIR Impregnating Tool Rollers Tool mouth Fibre entrance port

Slide 12 © CSIR Extrusion moulding

Slide 13 © CSIR Principle of a Plasticator

Slide 14 © CSIR Compression moulding

Slide 15 © CSIR Injection moulding

Slide 16 © CSIR Thermoplastic Pellets (TP) Glass fibres Process Chart Modified PultrusionTP with glass fibres Heating Extrusion Hot pressing Components Injection moulding

Slide 17 © CSIR Fibre Orientation Factors affecting fibre orientation Moulding processes Gates, Initial Charge and Part Geometry Thickness of the moulded part

Slide 18 © CSIR Outline of Research Develop a technique of aligning glass fibres using extrusion, injection and compression moulding processes. Optimise the mechanical properties by controlling the fibre orientation. Determine critical fibre length Produce complex shaped reinforced thermoplastic composite components. Test and analyse reinforced thermoplastic components.

Slide 19 © CSIR I would like to thank Kenton for their support through the Hystou programme