A Complete Buyer’s Guide for Modern Manufacturing

Introduction

In modern manufacturing and intralogistics systems, conveyor technology is no longer a simple transport solution—it is a strategic component that directly impacts productivity, labor efficiency, and product quality. Among the most widely used systems, roller conveyors and double plus chain conveyors (also known as accumulation chain conveyors) stand out due to their versatility and adaptability.

However, choosing between these two is not always straightforward. Each system operates based on different mechanical principles and serves distinct production scenarios. For buyers, engineers, and plant managers, understanding these differences is essential to making a cost-effective and future-proof investment.

This guide explores roller conveyors and double plus chain conveyors in depth, covering their concepts, working principles, key features, applications, and selection strategies. It also highlights the growing importance of customized (non-standard) automation solutions in today’s manufacturing landscape.

What Is a Roller Conveyor?

A roller conveyor is a material handling system that uses a series of cylindrical rollers mounted within a frame to transport goods. The rollers can either rotate freely (gravity roller conveyors) or be driven by motors through belts, chains, or line shafts.

In a typical operation, products move across the rollers with minimal friction, making this system highly efficient for transporting cartons, pallets, and rigid-bottom items. The simplicity of its structure makes it one of the most widely adopted conveyor types across industries.

From a mechanical perspective, the driving force is transferred either directly to each roller or indirectly through a transmission mechanism. This allows for flexible configurations such as accumulation zones, curves, merges, and transfers.

Roller conveyors are often chosen for their reliability, ease of maintenance, and relatively low initial investment. However, their performance depends heavily on product characteristics such as weight distribution and bottom surface stability.

This is a Roller Conveyor  used as a processing prduction line.

What Is a Double Plus Chain Conveyor?

A double plus chain conveyor is a powered conveyor system that uses a special chain design where the chain speed is higher than the speed of the conveyed pallet or workpiece carrier. This is achieved through rolling elements integrated into the chain links, reducing friction between the chain and the product carrier.

The defining feature of this system is its accumulation capability. Products can stop and queue without stopping the entire line, which makes it ideal for assembly lines and buffer zones.

Unlike roller conveyors, which rely on direct contact with rollers, double plus chain systems often use pallets or fixtures to carry products. This provides greater control over positioning and enables integration with automated workstations such as robotic assembly, inspection, and testing.

The system is widely used in automotive, electronics, and appliance manufacturing, where precise movement, controlled flow, and synchronization are critical.

This is a double plus chain conveyor,also called Accumulation Conveyor.

Working Principles Compared

Understanding how these systems operate helps clarify their strengths and limitations.

Roller Conveyor Principle

In a powered roller conveyor, a motor drives a series of rollers via belts or chains. When the rollers rotate, friction between the roller surface and the product moves the product forward. In gravity systems, movement is achieved through incline and gravity.

Accumulation can be achieved through sensors and zone control, allowing sections of the conveyor to stop independently. However, accumulation is typically less smooth compared to chain-based systems.

This is a turn of a roller conveyor.

Double Plus Chain Principle

The double plus chain uses a rolling friction mechanism. The chain itself moves at a higher speed, while rollers embedded in the chain reduce friction against the pallet. This creates a relative speed difference that enables smooth accumulation without damaging products.

When a pallet stops, the chain continues moving underneath it, preventing system-wide stoppages. This feature is particularly valuable in complex assembly lines.

These are two double plus chains.It’s worth noting that different chain materials will be selected depending on the usage scenario.

Key Features and Performance Comparison

Below is a practical comparison of the two systems based on real-world usage considerations:

Application Scenarios: When to Choose Each

From a buyer’s perspective, the choice depends less on the machine itself and more on the production objective.

Roller Conveyor Use Cases

Roller conveyors are ideal when the goal is efficient transportation over distance with minimal complexity. In logistics centers, they are commonly used for carton handling, sorting, and distribution. In manufacturing, they are suitable for moving finished goods or semi-finished products between stations.

They are particularly effective when products have flat, rigid bottoms and do not require precise positioning. For example, e-commerce warehouses, packaging lines, and general material transfer systems benefit significantly from roller conveyors.

Double Plus Chain Conveyor Use Cases

Double plus chain conveyors excel in assembly environments where workflow control is critical. In automotive production lines, for instance, each workstation requires the product to stop precisely for operations such as welding, fastening, or inspection.

Because the system supports accumulation without stopping upstream processes, it enables continuous production while allowing localized interruptions. This improves overall efficiency and reduces downtime.

Industries such as electronics assembly, appliance manufacturing, and precision equipment production frequently rely on this system.

Buyer Considerations: Beyond Basic Specifications

When evaluating conveyor systems, buyers often focus on price and speed. However, long-term performance depends on a broader set of factors.

First, product characteristics play a decisive role. Items with irregular shapes or unstable bases may not perform well on roller conveyors without additional fixtures. In such cases, a double plus chain system with pallets provides better stability.

Second, process complexity must be considered. If the production line involves multiple workstations, inspections, or robotic operations, a chain-based system offers better synchronization and control.

Third, scalability is increasingly important. As production demands change, the ability to modify or expand the system becomes a key advantage. This is where customized solutions outperform standard equipment.

The Rise of Non-Standard (Custom) Conveyor Systems

In today’s competitive manufacturing environment, standard conveyor systems often fall short of meeting specific operational needs. This has led to a strong shift toward non-standard, customized automation solutions.

Custom conveyors are designed based on actual production processes, product dimensions, takt time, and factory layout. Instead of adapting operations to fit the equipment, the equipment is tailored to optimize the process.

For example, a double plus chain conveyor can be integrated with lifting units, transfer modules, and robotic interfaces to create a fully automated assembly line. Similarly, roller conveyors can be customized with sensors, diverters, and sorting systems to handle complex logistics tasks.

This approach not only improves efficiency but also reduces labor costs and error rates.

This is the integration of double plus chain conveyor and roller conveyor.This system also includes an industrial robot.This is a small-scale logistics and warehousing system.You can click on the picture to see how it works.

Real Performance Impact: Before vs After Automation

The benefits of choosing the right conveyor system—especially when customized—can be significant.

These improvements are not theoretical; they reflect common outcomes observed in automated production upgrades.

Practical Selection Advice from Industry Experience

Selecting between a roller conveyor and a double plus chain conveyor should begin with a clear understanding of production goals rather than equipment specifications.

If the objective is fast and cost-effective transportation of goods with minimal process interaction, a roller conveyor is often the best choice. It offers simplicity, reliability, and scalability for logistics-heavy environments.

On the other hand, if the production process requires controlled movement, accumulation, and integration with automated workstations, a double plus chain conveyor provides a more robust solution.

It is also advisable to work with an experienced automation supplier who can evaluate your workflow and recommend a tailored system. A well-designed custom solution often delivers higher ROI than off-the-shelf equipment.

Why Choose Us as Your Roller Conveyor or Double Plus Chain Conveyor Partner?

Selecting an automated conveyor is not just a technical choice—it’s a strategic investment that impacts efficiency, labor costs, and scalability. That’s why choosing the right automation partner is essential.

With strong expertise in non-standard automation, we deliver solutions tailored to your real production needs—not generic designs. Whether you need a cost-effective roller conveyor for logistics or a precision double plus chain system for assembly, we can ensure that the design meets your production requirements ,and we have the ability to integrate it with robots, inspection systems, and MES.

We design, manufacture, and commission all systems in-house, ensuring quality, faster delivery, and cost control. More importantly, we focus on outcomes—offering process analysis, clear ROI insights, and flexible designs that support future expansion.

Ultimately, we do not just deliver conveyors—we build integrated production systems. From simple transport using roller conveyors to complex, high-precision assembly lines with automated assembly equipment powered by double plus chain conveyors, our goal is to create solutions that scale with your business and strengthen your competitive advantage.

Conclusion

Both roller conveyors and double plus chain conveyors play essential roles in modern manufacturing and logistics. While roller conveyors excel in simple, high-volume transport scenarios, double plus chain systems provide superior control and flexibility for complex assembly processes.

The decision ultimately depends on your production requirements, product characteristics, and long-term automation strategy. As industries continue to evolve, the trend toward customized conveyor solutions will only become more pronounced.

Investing in the right system today is not just about solving current challenges—it is about building a scalable and efficient production future.

If you want to get a customizable conveyor solution, leave us a message or add my what’s app/wechat :+8615376383002(Sophia)