Composites ppt
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Transcript of Composites ppt
CONTENTS Fiber glass introduction Application Door mould preparation Actual door production Advantages Disadvantages
Fiber Glass Doors Its a reinforced Plastic where the reinforcement fiber
is specifically glass fiber. The glass fiber may be randomly arranged, flattened
into a sheet (called a chopped strand mat), or woven into a fabric.
The plastic matrix may be a thermosetting plastic – most often epoxy, polyester resin – or vinylester, or a thermoplastic.
Chopped Fiber Glass
Woven Fiber Glass
Fiber glass application Car bodies Boats Insulation in homes Chairs Surf boards Roofs Doors
Fiber Glass Door Manufacturing Process
MOULD PREPARATION Starts with a real wood door Different panels are created The wood is scratched with a wire brush to expose
the grains the panels of the door are assembled in a special
fixture The dimensional accuracy is checked with a laser Special formulation of silicone is poured onto the
wood
Panels of the wood door
Silicone layers
Nickel shell (mould)
Cured overnight The silicone picks up the definition of the wood grains Mirror image copy of the door is created Another formulation of the silicone is injected
between this silicone pad and thin sheet of steel The silicone sheet produced is thinner for better
transfer of heat for the next process Chemical vapour deposition of Nickel vapour
The nickel shell produced has all the detail of the original wood door
This nickel shell is used as the door moulds
Fiber glass doors manufacturing
The fiber glass dough is flattened and cut into strips Strips are placed in the mould , heated and pressed It is then peeled off and the edges are trimmed The doors panels are stained to expose the
transferred wood grains The thickness is checked using a dial gauge
Dough like GRP
Door Press
Insulation and press
Rollers apply glue to the external frame These frames are glued to the ends of the fiberglass door
skin The door arrangement is squeezed though rollers The glue is cured over 24 hours The doors are placed in an insulated press and pressed Poly urethane insulation foam is injected into the doors The fill holes are capped to prevent the foam from
overflowing from the vent holes
Advantages High strength (due to presence of multiple materials) Durability Good looks – appearance Security Warranty Insulation
Disadvantage PRICE!! Standard sizing
ConclusionConvincing solid alternative to WoodEmbossed wooden grain – convincing knock offs (Imitations)
Thank You