Paint Line Conveyor Systems: Design, Types, and How to Choose

A reliable paint line conveyor is the central component of any industrial finishing operation. It determines the flow, speed, and efficiency of the entire process. Selecting the correct system impacts finish quality, production capacity, and operational costs. This article explains the types of paint line conveyor systems, key selection criteria, and best practices for integration and maintenance.

The Role of a Paint Line Conveyor in Finishing

The paint line conveyor does more than just move parts. It provides a timed, predictable path through each stage. This includes pretreatment, drying, coating, curing, and cooling. Consistent movement is vital for achieving uniform film thickness and proper cure. The system’s design directly affects accessibility for operators and automation.

Main Types of Paint Line Conveyor Systems

Different applications require different conveyor solutions. The main types are defined by their path and how parts are transported.

Overhead Conveyor Systems

Overhead systems are widely used in paint lines. They transport parts suspended from trolleys on an I-beam track above the floor.

Monorail and Power & Free Overhead Conveyors

• Continuous Monorail: A simple, closed-loop system. It offers constant movement ideal for high-volume production.
• Power & Free Systems: Provide more control. Carriers can stop, accumulate, and switch lines. This allows for different process times.

Benefits of overhead paint line conveyors:

• Maximize usable floor space.
• Facilitate enclosure of process stages.
• Allow parts to drain effectively after pretreatment.
• Can handle a variety of part shapes and weights.

Floor Conveyor Systems

Floor conveyors operate at ground level. Parts are placed on skids, carts, or a moving belt.

Common floor conveyor types include:

• Chain-On-Edge (COE)
• Slat conveyors
• Belt conveyors

These paint line conveyor systems are suitable for:

• Very heavy or bulky items.
• Flat products like panels or boards.
• Operations where overhead suspension is not practical.

Portable and Batch Systems

Not every operation needs a permanent, continuous line. Batch systems offer flexibility.

• Hand-Pushed Trolleys: Cost-effective for low volume or job shops.
• Batch Ovens with Integrated Carts: Parts are loaded onto carts, moved manually between stations, and rolled into a cure oven.

Key Factors for Choosing a Paint Line Conveyor

Selecting the right system requires careful analysis. HANNA consultants focus on these critical areas to recommend the best paint line conveyor.

Assess Your Production Profile:

• Part Dimensions and Weight: Determines required conveyor strength and fixturing.
• Production Volume: Defines the necessary line speed and system capacity.
• Part Shape: Influences how parts are hung or placed for optimal coating and drainage.

Evaluate Your Facility and Process:

• Available Space: Ceiling height, floor plan, and potential for future expansion.
• Process Stages: The number and length of pretreatment, coating, and curing zones.
• Coating Method: Manual spraying, automatic guns, or electrostatic discs have different access needs.

Consider Operational Goals:

• Flexibility: Will you run different products frequently?
• Ease of Maintenance: Can components be easily accessed and serviced?
• Energy Efficiency: A well-designed system minimizes heat loss in ovens.

Integration with Paint Line Components

A paint line conveyor must work seamlessly with other equipment. Proper integration is key to performance.

With Pretreatment Stages:
The conveyor must withstand humid, corrosive environments. Stainless steel components are often used in wash sections.

With Spray Booths:
Conveyor speed controls film build. The path must provide consistent gun-to-part distance. Open areas are needed for manual sprayers.

With Curing Ovens:
Accurate speed control is critical here. The conveyor must maintain a specific dwell time to ensure complete curing. Proper sealing at oven entry/exit points saves energy.

Maintenance for Long-Term Reliability

Regular maintenance prevents costly downtime. A planned schedule keeps your paint line conveyor running smoothly.

Essential Maintenance Tasks:

• Daily: Visual inspection for unusual noise, track obstructions, or loose parts.
• Weekly: Lubricate the chain as specified by the manufacturer (using compatible lubricants).
• Monthly: Inspect drive motors, take-up units, and trolley wheels. Check for wear.
• Annually: Perform a comprehensive system audit and component inspection.

Common maintenance issues include:

• Build-up of coating overspray on trolleys.
• Chain stretch or wear.
• Misaligned track sections.

Partnering with an experienced provider like HANNA ensures you receive proper maintenance guidance and support.

Why Select HANNA for Your Conveyor System?

HANNA designs and builds durable paint line conveyor systems for industrial applications. We focus on robust engineering and practical solutions. Our systems are made to perform in demanding finishing environments year after year.

We offer:

• Custom-engineered conveyor solutions.
• High-quality materials and components.
• Expert integration with all paint line stages.
• Ongoing technical support and service.

A well-designed HANNA conveyor system provides the reliable foundation your finishing process needs.

The choice of a paint line conveyor is a long-term investment in your coating operation’s efficiency and quality. By understanding the system types and carefully evaluating your specific needs, you can make a confident decision. Proper design, installation, and maintenance are the keys to achieving a smooth, productive, and consistent paint line.

Frequently Asked Questions (FAQs)

Q1: What is the main difference between a powder coating and a liquid paint conveyor system?
A1: The core function is identical. However, powder coating lines often emphasize thorough grounding for electrostatic application and may require designs that minimize powder entrapment. Liquid paint lines must manage solvent exposure and potential drips. HANNA engineers design for the specific requirements of each process.

Q2: How is the speed of a paint line conveyor calculated?
A2: Speed is based on the required dwell time in the slowest process stage, usually the cure oven. The formula is: Conveyor Speed = Oven Length / Required Cure Time. For example, a 60-foot oven needing a 20-minute cure requires a speed of 3 feet per minute.

Q3: Can an existing paint line conveyor be modified for higher capacity?
A3: Often, yes. Modifications can include increasing line speed (with motor/drive upgrades), adding more hanging carriers, or extending the track layout. HANNA can assess your current system and propose feasible upgrades to boost capacity.

Q4: What are the cleaning requirements for a conveyor in an active paint line?
A4: Regular cleaning prevents overspray buildup, which can cause contamination and mechanical issues. Daily or weekly wiping of trolleys and hooks is recommended. Periodic deep cleaning of the chain may be needed. Some systems use automatic chain washers.

Q5: What weight capacity should our paint line conveyor have?
A5: Capacity must account for the weight of the heaviest part, plus its fixture or hanger. It should also consider the total system load. Standard systems may handle 75-150 lbs per carrier, but HANNA can engineer heavy-duty systems for loads exceeding 1,000 lbs per carrier. Always include a safety factor in your calculations.