Trims

Trims

Contents • • • •

What is trims? Why do we need trims? Different Materials used in trims. Role of plastic trims in current market. • Role of trims in NVH

What is trim? • Car trim refers to the items that can be added to the exterior, and interior, of an automobile to increase its appeal.

Car Trim Component

Why do we need trims? • There are several types of car trim. Some are used to protect the car from unwanted damage that can be caused by surrounding vehicles in a parking lot, while others are simply for aesthetics. • Structure borne noise • Airborne noise • Ergonomic • Long life

• Automotive car manufacturers are facing increasing expectations from customers for driving comfort as well as requirements in weight and cost reduction. These requirements make testing, modelling and optimization of sound package design an emerging challenge to NVH Engineers.

 The sound package materials like, • Dash Panel • Carpet Assembly • Seats • Headliner • Package Tray • Hood Liner • Melt Sheet Can Be Used As Absorbers, Barrier And As Damping Treatments To Reduce Vibrations.

Dash Panel

Carpet Assembly

Carpet Assembly

Seats

Package Tray

Hood Liner

Different Materials used in trims • • • • • •

 Paint Plastic Leather Aluminium Stainless Steel Glass

Why plastic trim? • Minimal Corrosion, Allowing For Longer Vehicle Life. • Substantial Design Freedom, Allowing Advanced Creativity And Innovation. • Flexibility In Integrating Components. • Safety, Comfort And Economy. • Recyclability.

Types of Plastic Material in Current Market Polypropylene • Application: automotive bumpers, chemical tanks, cable insulation, gas cans, carpet fibers. Polyurethane (PUR) • Application: flexible foam seating, foam insulation panels, elastomeric wheels and tires, automotive suspension bushings, cushions, electrical potting compounds, hard plastic parts.

Poly-Vinyl-Chloride (PVC) • Application: automobile instruments panels, sheathing of electrical cables, pipes, doors.  ABS(Acrylonitrile Butadiene Styrene) • Application: automotive body parts, dashboards, wheel covers. Polyamide • Application: gears, bushes, cams, bearings, weather proof coatings.

Polystyrene • Application: equipment housings, buttons, car fittings, display bases Polyethylene • Application: car bodies (glass reinforced), electrical insulation. POM (polyoxymethylene) • Application: interior and exterior trims, fuel systems, small gears.

Polycarbonate (PC) • Application: windows, displays, screens. PBT (polybutylene terephthalate) • Application: door handles, bumpers, carburetor components. Polyethylene Teraphthalate (PET) • Application: wiper arm and gear housings, headlamp retainer, engine cover, connector housings.

ASA (acrylonitrile styrene acrylate) • Application: housings, profiles, interior parts  and outdoor applications.

Role of trims in NVH

Trim component with an Acoustic Foam / Porous material

Conclusion • • • •

Structure borne noise Airborne noise Ergonomic Long life