Double Plus Chain Conveyor for Automotive Assembly

What Is a Double Plus Chain Conveyor?

A double plus chain conveyor is a high-efficiency conveying system widely used in automotive assembly lines. It uses a special chain structure where the top rollers move faster than the chain itself. This creates a “speed multiplying” effect, allowing products or pallets to move quickly while the chain runs at a lower speed.

Double-plus chain conveyors play an irreplaceable role in modern production. To learn more, please read this article:Double Speed Chain: Structure, Advantages, and Applications Explained 

In automotive factories, this conveyor is commonly used to transport:

• Automotive parts
• Engine components
• Transmission assemblies
• Door modules
• Battery packs
• Vehicle sub-assemblies
• Pallets and fixtures

Compared with ordinary chain conveyors, double plus chain conveyors provide smoother transportation, lower noise, higher efficiency, and reduced wear.

Main Components of a Double Plus Chain Conveyor

A complete automotive double plus chain conveyor system usually includes the following parts:

1. Double Plus Chain

This is the core component.

The chain contains built-in rollers that rotate faster than the chain speed. This allows products to move faster with less friction.

Features:

• High wear resistance
• Low noise
• Long service life
• Stable transportation

2. Aluminum or Steel Conveyor Frame

The frame supports the entire system.

Common materials:

• Carbon steel
• Stainless steel
• Aluminum profile

Automotive assembly lines usually choose heavy-duty steel structures because automotive parts are large and heavy.

3. Sprockets

Sprockets drive the chain movement.

Functions:

• Ensure stable chain transmission
• Maintain synchronization
• Reduce slipping

Precision-machined sprockets are important for long-term reliability.

4. Drive Motor and Gearbox

The motor powers the conveyor.

Usually includes:

• AC motor
• Servo motor
• Variable frequency drive (VFD)
• Reduction gearbox

Automotive lines often require speed control for different assembly stations.

5. Pallets or Fixtures

Products are normally placed on pallets or dedicated fixtures.

Functions:

• Position components accurately
• Protect products during movement
• Enable robotic operations

Custom pallets are common in automotive automation.

6. Guide Rails

Guide rails keep pallets stable during movement.

Benefits:

• Prevent deviation
• Improve positioning accuracy
• Reduce vibration

7. Sensors and Control System

Modern automotive conveyors use intelligent controls.

Typical components:

• Photoelectric sensors
• RFID systems
• PLC controllers
• HMI touch screens

These systems monitor:

• Product location
• Conveyor speed
• Assembly sequence
• Error alarms

This is the double plus chain.Its ingenious design allows materials to be conveyed at 2-3 times the chain speed.

How Does a Double Plus Chain Conveyor Work?

The working principle is simple but highly efficient.

The motor drives the sprocket, which moves the double plus chain forward. The rollers on the chain rotate and create rolling friction instead of sliding friction.

Because the rollers rotate faster than the chain speed, the pallet moves faster than the chain itself.

This design provides several advantages:

• Lower chain wear
• Reduced energy consumption
• Smoother transportation
• Higher conveying speed

In automotive assembly lines, operators or robots can stop pallets at specific stations for assembly tasks while the rest of the line continues running.

This creates flexible and efficient production flow.

Why Automotive Factories Use Double Plus Chain Conveyors

Automotive manufacturing requires:

• High production speed
• Stable transportation
• Accurate positioning
• Low downtime
• Flexible automation integration

Double plus chain conveyors meet these requirements very well.

They are especially suitable for:

• Engine assembly
• Dashboard assembly
• EV battery assembly
• Chassis production
• Door assembly
• Seat assembly

Main Applications in Automotive Assembly

Engine Assembly Line

Heavy engine blocks require stable transportation.

Double plus chain conveyors provide:

• Smooth movement
• Precise positioning
• High load capacity

EV Battery Pack Assembly

Battery packs are expensive and sensitive.

The conveyor helps:

• Reduce vibration
• Protect battery modules
• Improve assembly precision

Door and Interior Assembly

Large automotive parts need synchronized movement.

The system allows:

• Multiple workstations
• Easy manual access
• Robot integration

Robotic Assembly Systems

Double plus conveyors work well with industrial robots.

Applications include:

• Automatic screw fastening
• Welding
• Vision inspection
• Material loading
• Component transfer

Automotive Final Assembly Lines

Vehicles move station by station during final assembly.

The conveyor ensures:

• Controlled flow
• Stable takt time
• Efficient labor utilization

Problems Solved by Double Plus Chain Conveyors

1. Excessive Friction and Wear

Traditional chain conveyors create more sliding friction.

Double plus chains use rolling movement, greatly reducing wear.

Result:

• Longer service life
• Lower maintenance cost

2. High Noise Levels

Automotive factories want quieter production environments.

Double plus conveyors operate more smoothly and quietly than many traditional conveyors.

3. Production Bottlenecks

Fast assembly lines require stable material flow.

The conveyor improves:

• Transportation speed
• Workflow balance
• Production efficiency

4. Difficult Robot Integration

Modern automotive factories rely heavily on automation.

Double plus systems support:

• Positioning accuracy
• Stable pallet transfer
• Synchronization with robots

5. High Maintenance Downtime

Traditional conveyors may require frequent lubrication and repairs.

Double plus conveyors reduce:

• Chain wear
• Roller damage
• System downtime

Comparison With Other Conveyor Systems

Double Plus Chain Conveyor vs Roller Conveyor

Conclusion

Roller conveyors are simpler and cheaper, but double plus chain conveyors are better for automated automotive production.

If you want to learn more about the difference ,pls check out this article:Roller Conveyor VS Double Plus Chain Conveyor

Sometimes double plus chain conveyoor is integrated with roller conveyors.

Double Plus Chain Conveyor vs Belt Conveyor

Conclusion

Belt conveyors are good for light products, but automotive assembly usually requires stronger and more precise systems.

Double Plus Chain Conveyor vs Slat Conveyor

Conclusion

Slat conveyors are durable but often noisier and heavier. Double plus conveyors provide better efficiency for many automotive applications.

Standard Conveyor vs Custom Conveyor

Why Custom Design Matters

Every automotive factory has different:

• Product sizes
• Production speed
• Layout restrictions
• Automation requirements

A custom-designed conveyor system improves:

• Efficiency
• Reliability
• Space utilization
• Automation compatibility

Advantages of Double Plus Chain Conveyors

Higher Production Efficiency

Fast and stable transportation improves production throughput.

Lower Operating Cost

Reduced wear means:

• Less maintenance
• Fewer spare parts
• Lower downtime

Better Automation Compatibility

The system integrates easily with:

• Industrial robots
• Vision systems
• AGVs
• Automatic inspection equipment

Stable Product Transportation

Smooth movement protects automotive components from damage.

Long Service Life

Heavy-duty materials and low friction increase equipment lifespan.

Why Choose a Custom Automotive Conveyor Solution?

Standard conveyors may not fully match automotive production requirements.

A custom double plus chain conveyor can provide:

• Customized pallet design
• Special heavy-load structure
• Flexible workstation layout
• Robot synchronization
• Intelligent control integration
• Future production scalability

For automotive manufacturers, customization often delivers better long-term productivity and lower total operating cost.

Why Choose Us

As a non-standard automation equipment manufacturer, we provide more than just conveyors.

Our advantages include:

• Custom conveyor system design
• Complete automotive assembly line integration
• Industrial robot integration
• PLC and intelligent control systems
• Heavy-duty structural manufacturing
• In-house engineering and production
• Flexible solutions for different vehicle platforms

We help automotive factories build efficient, reliable, and scalable automated production lines.

Contact us or add what’s app to get a professional solution.

Conclusion

Double plus chain conveyors have become an important solution in modern automotive assembly.

Compared with traditional conveyor systems, they offer:

• Higher efficiency
• Lower wear
• Better automation compatibility
• Stable product transportation
• Lower maintenance costs

For automotive manufacturers seeking higher productivity and smarter automation, a custom double plus chain conveyor system is often the best long-term investment.