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)

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