High-Pressure Heated Material Line for Robotic Automotive Bonding Cells

Introduction

Automotive adhesive systems must deliver a repeatable quantity of material during every production cycle.

The pump, metering unit and dispensing valve may be operating correctly, but unstable material temperature inside the connecting hose can still affect the final bead.

A high-pressure heated material line for automotive robotic dispensing maintains adhesive or sealant temperature while withstanding the pressure required to move highly viscous materials.

The hose can be customized for domestic and imported dispensing equipment, including configurations associated with SCA, ATN, GRACO and other automotive adhesive systems.

The Hose Influences Robot Dispensing Accuracy

Robotic dispensing relies on consistent material behaviour.

When adhesive temperature changes, viscosity and pressure response may also change. This can affect how quickly material reaches the nozzle and how accurately the system starts or stops dispensing.

Possible production problems include:

• Uneven adhesive-bead width

• Delayed dispensing response

• Pressure fluctuation

• Excessive pump load

• Incomplete material filling

• Localized hose blockage

• Increased material waste

• Unplanned robot-cell downtime

The heated hose therefore forms part of the complete dispensing-control system.

Combining High Pressure and Temperature Maintenance

Automotive adhesives and sealants may require substantial pressure to move through long hoses, valves and application heads.

At the same time, the material must remain within its recommended processing-temperature range.

The hose must therefore combine:

• High-pressure reinforcement

• Stable internal heating

• Thermal insulation

• Flexible robot-cell routing

• Reliable fluid fittings

• Accurate temperature sensing

• Equipment-specific electrical connections

Matching only the pressure rating is not sufficient. The complete thermal and electrical configuration must also match the machine.

Temperature Capability

The automotive production-line hose supports temperatures up to:

200°C

The correct setting should be based on the adhesive or sealant manufacturer’s process requirements.

Excessive temperature may accelerate material degradation, while insufficient temperature may increase viscosity and system pressure.

Ultra-High-Pressure Performance

The 3/8-inch catalog model has a reference working pressure of:

475 bar / 6,888 psi

Its listed burst pressure is:

1,900 bar / 27,550 psi

Final allowable pressure depends on:

• Operating temperature

• Hose diameter

• Fittings

• Crimping structure

• Pressure pulses

• Robot movement

• Hose installation

• Complete assembly design

Applications in Vehicle Manufacturing

The hose can be customized for:

• Structural adhesive dispensing

• Body seam sealing

• Windshield bonding

• Roof-panel bonding

• Battery-pack assembly

• Underbody sealant

• Door and panel bonding

• Robotic mastic application

• Sound-insulation material

• Electric-vehicle production lines

Managing Robot Movement

Automotive production hoses may move repeatedly with a robot, dispensing arm or application head.

Dynamic installations should consider:

• Minimum bending radius

• Hose-support position

• Robot movement path

• Torsion

• Repeated flexing

• Acceleration and deceleration

• Distance from sharp components

• Electrical-cable routing

The hose should not be twisted or bent below the specified minimum radius.

Equipment-Matching Options

Reference Product Data

The data above is taken from the product catalog. Final operating limits must be confirmed for the complete hose assembly.

Replacement Hose Information

To reproduce an existing automotive hose, please provide:

• Adhesive or sealant type

• Operating temperature

• Normal and maximum pressure

• Hose length

• Inner diameter

• Voltage

• Heating power

• Sensor type

• Pump-side fitting

• Gun-side fitting

• Electrical plug

• Pin arrangement

• Robot movement conditions

• Equipment brand and model

• Original hose photographs