composite manufacturing on fabrication of final shape

8/8/2019 Composite Manufacturing on Fabrication of Final Shape

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COMPOSITE FABRICATION

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Composite Fabrication

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Pultrusion

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Pultrusion

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2/11

Pultrusion

Advantages

Continuous process.

Can be fully automated

ow cos er an res n sys em usproduce low cost production product.

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Pultrusion

Disadvantages

Only for constant cross section product.

Internally high tolerance part cannot be.

Thin wall cannot be produced.

Only 00 direction can be produced or use

fabric. Parts are constant dimension axially.

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Filament Winding

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Filament Winding

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3/11

Filament Winding

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Filament Winding

Advantages

Very suitable for pressure vessel applicationdue to cost effective and high performance

Low cost tooling system

Automated setting for high volume

production

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Filament Winding

Disadvantages

Limited to produce closed and convexstructure.

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Maximum 60 % of fiber volume fraction canbe achieved.

Hard to obtained unique fiber distribution

and resin content throughout the thicknessof the laminate.

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Wet Lay Up

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4/11

Wet Lay Up

Advantages

Low capital investment due to almostnegligible expensive equipment is used.

Production and material cost is low

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Wet Lay Up

Labor intensive

Mostly suitable for prototyping or largestructure

ua ty o n s part s not cons stent

High fiber volume fraction parts cannotbe produce

The process is messy

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Pre-Preg Lay Up

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Pre Preg Lay Up

Advantages

Can achieve high fiber volume fraction

Easily manufacture the simple and complex

Suitable for making prototype parts

Low tooling cost

Strong and stiff part can be fabricated from

this process

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5/11

Pre Preg Lay Up

Disadvantages

High investment cost

Labor intensive and not suitable for high

Parts are expensive

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Vacuum Bagging

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Vacuum Bagging

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Basic Requirement for vacuumBagging

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6/11

Application Sequence

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Even clamping pressure Control of resin content Custom shapes Efficient laminating Mobility of operation

Advantages

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Limited to small surface area

Disadvantages

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Vacuum bagging

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7/11

Press/Compression Molding

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Press/ Compression Molding

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Advantages

High volume rate production

Low cost production at high volume.

possibilities

Multiparts can be consolidated into onesingle molded part

More rapid design to production schedules.

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Disadvantages

High initial investment cost

Not suitable of making low volume parts or.

Use for nonstructural parts.

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8/11

Resin Transfer Molding

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Resin Transfer Molding (RTM)

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Advantages

Low initial investment cost

Molding can be made close to dimensionaltolerances

Intermediate volume production rate

Can easily incorporated inserts for good joining andassembly features

Low volatile emission due closed molding process.

Less scrap

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Disadvantages

Go through trial-and-error with experimentation

Tooling and equipment cost are higher than

Complex tooling design.

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9/11

SCRIMP

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SCRIMP

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SCRIMP

Advantages

Suitable of making high volume structural

parts at low cost especially.

configurations can be made.

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SCRIMP

Disadvantages

Large capital investment

High tooling cost

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10/11

Mold Release Application

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Peel Ply or Release Fabric

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Release Fil

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Breather/ Bleeder Application

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Sealant Tape

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composite manufacturing on fabrication of final shape

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