As a professional supplier of packaging machinery parts, Hansheng Automation has successfully provided solutions to packaging machinery companies in countries like Mexico and Vietnam. Our products are empowering their production! Below, we will share some knowledge related to automatic packaging production lines, hoping it will be helpful to you.
If the packaging machine is the heart of any automated production line, then the conveyor system is undoubtedly the "arterial system" that runs throughout the entire system. As a core component of the automated packaging line's auxiliary equipment, the design and selection of the conveyor system directly determines the efficiency, stability, and flexibility of the entire line.
This article will delve into several mainstream conveyor systems used in packaging lines-belt, chain, and roller conveyors-and analyze their respective operating principles, structural characteristics, and core application scenarios.
The core role of the conveyor
The primary task of a conveyor is to transport packaging materials and items to be packaged, as well as transfer finished and semi-finished products between packaging processes. However, its role goes far beyond this. In modern packaging processes, conveyors also perform the following functions:
Rhythm Control and Buffering: By adjusting the conveying speed, products can be collected or separated, ensuring a stable material flow for subsequent processes.
Function Integration: Functions such as steering, diversion, merging, detection, and positioning can be integrated into the conveying process, making the production line more intelligent.
Depending on the drive method, conveyors are mainly divided into gravity conveyors and powered conveyors. Gravity conveyors rely on the weight of the items to move along a slide to the designated location, while powered conveyors are divided into belt conveyors, chain conveyors, and roller conveyors. The following focuses on powered conveyors.
Belt conveyor
Belt conveyors are one of the most widely used conveying equipment due to their simple structure, reliable operation, and low cost.
Working Principle and Structure
It consists of a closed-loop conveyor belt (usually made of cotton or synthetic fabric) wrapped between a driving pulley and a driven pulley. A motor drives the driving pulley, which in turn drives the conveyor belt in a circular motion through friction, transporting items placed on it. To support the conveyor belt and the items, a pallet (for light loads and short distances) or rollers (for heavy loads and long distances) are typically installed underneath.
Core Applications and Functions
Variable Speed Convergence and Decoupling: This is a very clever application. When two conveyor belts in series have different speeds (for example, the speed v1 of the front section is greater than the speed v2 of the rear section), items can be accumulated on the rear section, achieving dense feeding. Conversely, the distance between items can be increased, achieving intermittent feeding, creating conditions for processes that require fixed spacing, such as labeling and coding.
Performance improvement: In order to adapt to different working environments, such as humid, oily or anti-static environments, the wear resistance, corrosion resistance and anti-adhesion performance of the conveyor belt can be significantly improved by coating the surface of the conveyor belt with a protective layer such as chloroprene rubber or polytetrafluoroethylene (PTFE).
Legend
1-Drive pulley; 2-Tension pulley;
3-Pulley; 4-Driven pulley;
5-Transport item; 6-Conveyor belt.
Chain conveyor
Chain conveyors demonstrate their unique advantages when conveying heavy items, requiring precise positioning, or when working in environments unsuitable for conveyor belts.Using chains as both traction and load-bearing components, they are primarily categorized as chain and plate chain.
Chain conveyors
Typically consist of two or more parallel roller chains, equipped with specialized attachments (such as pushers or baffles) that directly push or drag items forward. This method offers precise positioning and high load-bearing capacity, making it widely applicable.
Plate chain conveyors
This is a key branch of chain conveyors. Its structure, shown in the figure below, consists of numerous chain plates connected by pins to form a flat, continuous conveying surface. This type of conveyor is a staple in alcohol and beverage bottling lines, specifically designed for conveying stable containers such as glass bottles, PET bottles, and cans. Its chain plates are typically made of stainless steel, meeting food hygiene requirements while being wear-resistant and easy to clean.
Legend
1-Driven Sprocket; 2-Accessory; 3-Drive Sprocket;
4-Supporting Rail; 5-Tensioning Pulley;
6-Conveyor Chain; 7-Conveyed Item
Roller conveyor
Roller conveyors are the most efficient choice for bulky, heavy, and flat-bottomed items.
Operating Principle and Structure
They consist of a series of equally spaced rollers secured by a support plate. Powered roller conveyors typically use a sprocket and chain system, with a motor driving some or all of the rollers to rotate, thereby moving the goods forward.
Core Applications
Roller conveyors are typically used at the end of packaging lines, specifically for conveying finished packages such as corrugated cardboard boxes, plastic transfer boxes, and beer crates. Their robust structure and strong load-bearing capacity make them easily capable of handling large volumes and heavy loads.
Legend
1 - sprocket; 2 - drive chain; 3 - roller; 4 - support plate
In short, belt, chain, and roller conveyors form the backbone of material flow in automated packaging lines. Each has its own unique strengths, complementing each other. Belt conveyors, with their flexibility and affordability, are the preferred choice for light loads and bulk material conveying. Chain conveyors, with their precision and durability, are primarily used for conveying bottles, cans, and heavy items. Roller conveyors, with their high load capacity, are experts in conveying finished cartons. Hansheng Automation, as an expert in packaging machinery, is a great choice for your inquiry if you're interested in the precision and capabilities of our products, precision components, and packaging machinery.