injection compression molding of head-up display mirror ... · continental automotive gmbh 3 ›...

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Innovation and Precision Injection Compression Molding of Head-up Display mirror with ARBURG

Continental Automotive GmbH 2

› Head-up displays in automobiles

› Types and functionality of head-up displays

› Mirrors as optical part in the head up display

Index

› Mirrors as optical part in the head-up display

› Production of HUD-mirrors with ARBURG injection molding machines

› Outlook

› Projection of all relevant information directly into the view of the driver

› No focusing of the eye during driving

Head-up displays in automobiles - function

› Increase of driving safety, reduce of accident risk

› Linking with modern car assistant systems possible

› Examples:


› requirements for visualization

› sharp and free of visual defects

› straight image (on curved

Head-up displays in automobiles - requirements

s a g age (o cu edwindshield)

› no distortion – static und dynamic

› aspect

› Inclination

› waviness

› mismatching between left and right eye

Types and functionality of head-up displays -comparison

Combiner HUD Windshield HUD

› Small volume, useable even for small cars

› Useful for different types of cars without individual matching

› Att ti i

› Large image

› Projection distance at optimum

› Better image quality› Attractive price

› High quality product

› No interference in view to the road


Types and functionality of head-up displays - function

Mirrors as optical part in the head-up display - function

Combiner HUD Basic Windshield HUD

› function of a HUD mirror

High Class Windshield HUD

› reflection

› magnification

› compensation of curved windshield

› adjustment


Mirrors as optical part in the head-up display –requirements to the plastic part

high level of surface quality and reflection

good adhesion of coating

coatable High dimensional stability

high purity

high temperature stability

high stiffness and low vibration

Mirrors as optical part in the head-up display –requirements to the process

precise

stable – free of environmental influence

controllable in small steps

precise

low demolding forces

Free of contamination

confirmed capability due to automotive standards

repeatable

processable


Production of HUD mirrors with ARBURG machines –Injection compression molding (schematic)

Injection molding Injection compression molding

cavityholding pressure holding pressureholding pressure holding pressure

Clampingforce

Compres-sion force

› very accurate reproduction of surface details

› high degree of freedom due to many different compression modes and controls

› constant load balancing over whole part surface

Production of HUD mirrors with ARBURG machines –Advantages of injection compression molding

› constant load balancing over whole part surface

› low inner stress inside part resulting in low distortion

› gate cutting inside tool possible

methodhydraulic compression

moldingelectric compression

molding

positioning accurance +/- 0,1mm +/- 0,001mm

repeatability + /- 50µm + /- 10µm


› use of ARBURG machines of the following types

› ALLROUNDER 720 A


Production of HUD mirrors with ARBURG machines –machine and environment


› customized for the special requirements of mirror production

› close cooperation between ARBURG and Continental

› complete automatization concept for part handling

› Injection molding machine and robot cell inside clean room class ISO 7

› stable environment

Production of HUD mirrors with ARBURG machines –machine and environment

› stable environment

› 100% process control und traceability

› Tool building in inhouse tool shop


Production of HUD mirrors with ARBURG machines –process control

Mirror at CAD 0

Dishing

Distorsion Stretched edges

Stretching

Distorsion Stretched edges

› The composition of all these factors ensures the degree of precision which is necessary for the product.

Outlook – Augmented Reality HUD

Navigation Lane DepartureWarning

Adaptive Cruise Control

› Overlap of real driving situation with virtual information

› Continuous visualization of vehicle behavior with real-time feedback

› Important requirement for autonomous driving


Outlook – requirements for future mirrors generations

larger

AR-HUD / High-ClassAR HUD

larger

Current mirrors

DMD Windshield HUD

cheaper

commodity productHigh Class Windshield HUD

Thank you for your attention!

Further Information:http://www.continental-head-up-display.com

injection compression molding of head-up display mirror ... · continental automotive gmbh 3 ›...

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