This article contains everything you will need to know about metal conveyor belts and their use.
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A metal conveyor belt features a surface made from metal sheets or woven wire mesh. This metal construction improves the conveyor's ability to manage heavy, sharp, or slippery items, as well as those that may shift during transport. Metal conveyor belts can be crafted from various forms of metal, including plate, woven, and wire, all designed to endure the demands of carrying substantial loads. These belts are often used in harsh environments where other types, like fabric or plastic belts, may fail.
Metal conveyor belts function similarly to other types of belt conveyors, but they are distinguished by their unique material. These belts are specifically engineered to manage materials that are too harsh for roller conveyors, plastic belts, or fabric belts, which could potentially harm standard conveyor systems.
In various sectors, metal conveyor belts are crucial for managing specific materials. For instance, scrap yards use these belts to transport metal pieces into furnaces. Similarly, industries such as die casting, forging, and stamping rely on metal conveyor belts to handle components like forgings, molds, and diverse metals involved in metal forming operations.
Metal conveyor belts are classified based on the types of metals used in their construction. These metals contribute to the belts' strength, capacity, and overall durability. Additionally, the design of metal conveyor belts varies significantly, encompassing different belt types and the mechanisms that power them.
Metal slat conveyor belts are made from metal slats, typically ranging in depth from 4 inches to 6 inches (10.2 cm to 15.2 cm) and thickness from 1 inch to 2 inches (2.5 cm to 5 cm). The width of these slats varies according to the conveyor bed width, with options from 28 inches to 50 inches (71 cm to 127 cm). These conveyors are known for their high capacity and are well-suited for handling challenging loads, including hot components, oily parts, or items with sharp edges. The slats move along a low friction roller chain that supports them as they travel.
Metal slat conveyor belts feature slats secured between chains with bolts, creating a robust and level surface. This design ensures a stable, flat platform ideal for moving assemblies during production and assembly tasks. Metal slat conveyors offer exceptional strength and deliver reliable performance even under heavy load conditions.
Metal slat conveyors, despite having smooth, flat surfaces, are capable of handling incline and curve conveying tasks. This functionality is due to the friction between the slats and their loads, combined with the weight of the loads themselves. A motor powers a chain that moves the slats, creating a cycle akin to that of conventional conveyor belts.
Metal slat conveyors come in various types to suit different needs. Standard slat conveyors are ideal for handling small to medium loads and provide orientation control without accumulation. For heavy-duty applications, especially in the automotive industry, heavy-duty slat conveyors are commonly used. They efficiently transport large, cumbersome, and irregular materials at slower speeds for production processes.
An apron conveyor, utilized prominently in the mining sector, features a distinctive design with interlocking metal plates and sealed edges. This creates a continuous, leak-proof trough that is driven by a chain mechanism. Often referred to as pan conveyors, apron conveyors are ideal for managing feed discharge without any spillage.
A wire mesh conveyor belt refers to various styles of mesh belts, each with unique weaves, patterns, and designs. Due to their versatile construction, these belts can be tailored for different applications. From tightly woven to loosely woven configurations, each type is engineered to meet specific operational needs or requirements.
Compound Balanced Conveyor Belts – Compound balanced conveyor belts have left and right-hand spirals that are compounded together to make a tightly woven flat conveying surface. The tight weave prevents materials from falling through the openings in the weave. As with many of the various types of mesh conveyor belts, compound balanced weave conveyor belts are produced with a wide variety of weaves with each type following a basic pattern or structure.
The manufacture of compound balanced conveyor belts involves a set of precision steps that ensure the quality of the belt and the structure of its weave. Flipping the sections of the belt during production enhances the structure of the belt and ensures that it will track properly. If a compound balanced conveyor belt is properly assembled, it should have variations in color between each of its sections, a factor that guarantees the quality of the weave and the belt.
Balanced Metal Weave Conveyor Belt – Balanced metal weave conveyor belts have right and left-hand spirals that are joined by a crimped connector for each spiral row. The edges of the belt are welded and are available in a limitless number of mesh choices, which are dependent on the application for which the belt will be used. Although balanced metal weave conveyor belts may seem similar to compound balanced weave conveyor belts, the weave of balanced metal weave conveyor belts is less dense, a factor that will allow small pieces to fall through the belt.
The choices of types of balanced metal weave conveyor belts includes the number of spirals per foot, the gauge of connector wires, spiral wire gauge, and second connectors per foot. To further meet the specific needs of an application, spiral pitch and various belt widths are available with pitches ranging from 12 up to 144 and widths of pitches ranging from 3 in up to 0.25 in. Gauges of wire for balanced metal weave conveyor belts range from 1 up to 144 with custom connectors and spirals available on demand.
Gratex Metal Conveyor Belt – Gratex metal conveyor belts have very closely wound spirals connected with a straight metal rod. They have a semi closed mesh, which makes them capable of transporting very small parts. Gratex metal conveyor belts are a compromise between compound metal conveyor belts and balanced metal conveyor belts in that they are woven like balanced conveyor belts but not as loose and more like compound balanced conveyor belts.
The metal rod connector of gratex metal conveyor belts provides stronger connection between the weaves of the mesh, which produces the semi closed structure. It is this factor that makes gratex metal conveyor belts capable of carrying smaller parts and heavier loads.
Chain Link Metal Conveyor Belt - Chain link metal conveyor belts have a simple design that features spiral coils interwoven to create a wire mesh that has knuckle or welded edges. The successive interwoven spiral wires have the appearance of a chain linked fence. The design of chain link metal conveyor belts makes them economical and ideal for lightweight conveying applications.
The three types of chain link metal conveyor belts are standard, reinforced, and double reinforced. Standard chain link conveyor belts have large open areas that allow for easy air flow for heating, cooling, and drying applications. Reinforced chain link metal conveyor belts are sturdier, have less open space, and are built for more rugged applications. Of the three types, double reinforced chain link metal conveyor belts have extremely small openings for superior strength and durability.
Ladder conveyor belts, also referred to as rod conveyor belts, are constructed with cross rods linked together by S-shaped hooks, chain links, and U-shaped links. To enhance the belt's strength, a ring is welded to each cross rod. Visually, a ladder belt resembles a series of small ladders interconnected to form a flat, open surface. These metal conveyor belts are powered by a sprocket drive that engages with the edges of the links.
Primarily used in bakeries, ladder belts are made from materials such as carbon steel, stainless steel, or galvanized steel, which can endure temperatures up to 300°C (572°F). The diameter of the wires in ladder belts ranges from 0.9 mm to 2.35 mm, with a pitch spanning from 4.24 mm to 20.32 mm. They come in various widths to accommodate different applications.
An eyelink metal conveyor belt is made up of eyelink components, which are wire segments featuring eye-shaped ends. To assemble these belts, the eye-shaped ends of the wires are connected to rods that pass through the center of each eye. The belt also includes plate links, which are small, flat, rounded plates with holes near the rounded edges. These holes accommodate rods, allowing the plates to evenly distribute the load across the conveyor belt and support the entire structure.
Eyelink conveyor belts, like other metal conveyor belts, vary in structure and manufacturing methods. They can be classified into several types: welded, pressed, full, spring-wrapped rod, and those featuring bushings and washers between the eyelinks. Additionally, side finishings may include welded edges, chain edges, guide plate edges, plastic block edges, or edge plates.
Honeycomb metal conveyor belts, also referred to as flat wire belts, feature flat metal strips with crimped edges connected by rods welded at the borders. These crimped strips create a lattice structure, through which straight round rods are inserted. The defining characteristic of honeycomb metal conveyor belts is their flat surface, which allows for easy cleaning and straightforward replacement of damaged sections.
Honeycomb metal conveyor belts are perfect for processes like washing, cooling, drying, and cooking due to their open design. These belts are not only lightweight but also strong and durable, and they operate efficiently with a sprocket drive system.
Flexible rod metal conveyor belts feature alternating spiral patterns linked together with rods and chain links on either side. These belts are secured by button heads. Designed for versatility, flexible rod metal conveyor belts can handle spirals, curves, circles, and straight runs. Their side flexibility allows for installation around obstacles and structural elements within a building.
Flexible rod metal conveyor belts are built for exceptional strength and durability, reducing the need for frequent maintenance. They are engineered to navigate around obstacles effortlessly. Additionally, their flexibility can be customized to meet specific application requirements or manufacturing processes by adjusting the belt’s turning radii.
Biscuit baking conveyor belts, also referred to as rolled baking bands or Z belts due to their Z-shaped spiral design, are constructed from lightweight and thin metal spirals. These belts feature low thermal inertia and exceptional durability, ensuring optimal airflow for efficient baking.
Biscuit baking conveyor belts are manufactured by compressing spiral woven mesh through rollers, similar to roll forming techniques. This compression results in a smooth, flat surface with a thin, lightweight construction. The final product is both strong and low in mass. These conveyor belts are driven by friction from a large drum positioned at the end of the conveyor system.
Biscuit baking conveyor belts are designed to transport dough through the baking cycle and can endure temperatures as high as 275°C (527°F). These belts are engineered to deliver consistent heat distribution across both their width and length. The different types of biscuit baking conveyor belts are classified by their Z specifications, which include variations in wire gauge, mesh size, and belt weight.
Flat metal conveyor belts are crafted from metal sheets formed into a continuous belt. Although they resemble conveyor belts made from fabric, plastic, or other materials, these belts consist of interconnected metal sheets, often stainless steel. They offer a flat, smooth surface that ensures the conveyed products maintain their finish. Unlike mesh metal conveyor belts, flat metal versions do not feature gaps or openings.
Initially, conveyor belts were designed as flat belts, suited for a wide range of uses. Flat metal conveyor belts, distinct from wire mesh types, are specialized for tasks needing a robust, even surface. These belts are ideal for applications requiring a smooth, durable material that protects the transported items from damage.
There are numerous metal conveyor belt options available from manufacturers, and the ones mentioned here represent just a fraction of what is offered. Often, clients work closely with manufacturers to create custom conveyor belts tailored to specific applications or processes. The appeal of metal conveyor belts lies in their strength, durability, flexibility, and extended lifespan. They are designed to last for many years with minimal maintenance, making them a cost-effective choice for handling and moving products.
Metal conveyor belts are made from a variety of metals, including different stainless steel alloys, carbon steel, Inconel, Invar, titanium, and aluminum. The selection of metal depends on the customer's needs and the manufacturer's preferences. Engineers and designers favor metals for conveyor belts because of their durability, resistance to corrosion, wear, and temperature, as well as their high tensile and yield strength.
Metal conveyor belts are often made from Series 304 and Series 316 stainless steels, chosen for their resistance to corrosion and ability to withstand temperature fluctuations. Given their widespread use in the food industry, stainless steel is preferred for its non-porous, easy-to-clean surface and remarkable durability.
Stainless steel conveyor belts are available in various types such as mesh, chain rod, flat wire, and balanced weave. These belts are designed for different needs, including mesh for optimal drainage and air circulation. For specialized requirements that demand a non-stick surface, stainless steel belts can be coated with materials like Teflon. The versatility of stainless steel allows it to be fashioned into diverse forms and patterns, including reinforced and knitted designs.
Carbon steel conveyor belts are chosen for their exceptional durability and strength, making them ideal for challenging environments like mining, manufacturing, agriculture, and logistics. These belts feature a hard, smooth surface and are commonly utilized in food processing due to their excellent thermal conductivity.
Fatigue tests reveal that carbon steel can withstand up to two million load cycles before showing signs of fatigue, with a fatigue limit of 460 N/mm2. To ensure the required strength and durability, carbon steel conveyor belts must undergo heat and leveling treatments. A crucial aspect of these treatments is achieving a high level of surface flatness on the belt.
Inconel is a nickel-chromium alloy known for its minimal magnetic permeability and exceptional heat resistance. Much like stainless steel, Inconel is a clean metal that eliminates the need for lubrication and produces no particulate matter. Its resistance to static electricity makes it ideal for handling electronic materials during assembly.
Inconel, similar to stainless steel and aluminum, offers excellent resistance to corrosion, alkaline environments, and oxidizing agents, making it ideal for applications involving chlorides. Inconel conveyor belts are designed to withstand harsh conditions where materials encounter elevated temperatures, high pressure, and substantial loads. When exposed to high heat, Inconel develops a protective oxide layer that enhances its durability.
Invar is an alloy composed of nickel and iron, known for its minimal thermal expansion. Its name is derived from the term 'invariable,' highlighting its stability under varying temperatures. This characteristic is crucial for applications subjected to fluctuating temperatures, where other metal conveyor belts may distort, leading to misalignment and tracking issues. Invar’s consistent behavior under these conditions makes it an effective and economical choice for maintaining precision and stability.
Aluminum conveyor belts are constructed from series 6063 aluminum, which undergoes a T5 heat treatment process. This treatment involves both heating and aging the material. Like other aluminum products, these conveyor belts feature a smooth surface, a unique look, and excellent resistance to corrosion and rust. Typically, aluminum conveyor belts are designed as wire mesh due to the metal's flexibility and ease of shaping.
Wire conveyor belts are crafted through various methods, which may include weaving wires in an over-and-under pattern, twisting the wires, or connecting them with rods. The weaving technique creates both wire cloth and wire mesh. The primary difference between wire mesh and wire cloth is the size of the openings and the thickness of the wires, with wire mesh typically featuring larger openings and thicker wires. Adjustments to the strength and stability of wire mesh conveyor belts can be made by altering the openings, wire thickness, and connection methods.
The selection of wire mesh depends on three main factors: the number of mesh strands per inch, the thickness of the wire, and the quantity of openings in the mesh.
Woven wire mesh resembles woven fabric in that it features intersecting wires arranged in an over-and-under pattern, with the wires crossing each other at right angles. This plain weave type is rigid and offers less flexibility. In contrast, twill weaves provide greater flexibility through a staggered design, where the warp wires follow a parallel diagonal arrangement. The twill technique allows for the use of thicker, larger diameter wires, which is not feasible with a plain weave.
Twill weaves are frequently utilized in metal conveyor belts due to their ability to form intricate, dense grid patterns with enhanced tensile strength. In this weave, each wire weaves over and under multiple other wires, contributing to the overall density. The result is a pattern of diagonal, interlocking wires that offers both strength and stability.
Wire mesh conveyor belts are typically created through a simple weaving technique. Alternatively, various methods exist for producing these belts, with some being exclusive to specific manufacturers.
Ladder – Ladder belts consist of short lengths of wire that are connected by being bent at either end such that they hook together to form one section of the belt. The different ladder sections are hooked to each other to form a complete belt.
Efficient manufacturing processes rely heavily on the transportation of goods, materials, and products through various conveyance systems. These systems can include automated guided vehicles (AGVs) and intricate conveyor setups. Selecting the right in-house conveying method significantly impacts operational efficiency and productivity, necessitating thoughtful evaluation and planning.
Choosing the right belt conveyor involves selecting from a range of materials such as plastics, rubber, polyester, and metal, which make up the belt surface. The selection depends on the specific industry and the nature of the products being handled, as the method of conveyance can affect product quality.
Since the 1700s, conveyors have utilized various flat, smooth surfaces for transport. As products have grown heavier, more delicate, and complex, advancements in conveyor technology have led to safer and more resilient solutions. In the food industry, where high-volume cooking and production are standard, metal conveyor belts have become essential. Ongoing innovations continue to enhance the strength, durability, and precision of these metal belts, adapting to evolving industry needs.
Metal conveyor belts are renowned for their exceptional durability, constructed from metals designed to withstand severe and challenging environments. Unlike other conveyor belt materials, metal belts offer superior longevity, handling heavy loads and sharp objects with ease. Depending on the metal types used, these conveyor belts can be equipped with additional features, such as resistance to corrosion, chemicals, and extreme temperatures.
Maintaining clean conveyor belts is crucial across various industries, including food production, pharmaceuticals, and technology. Metal conveyor belts stand out because they do not emit dust or particulate matter, making them ideal for cleanroom applications. Most metal conveyor belts are frictionless, eliminating the need for lubrication and requiring minimal upkeep. They are also easy to clean and can be sterilized repeatedly without losing their effectiveness.
Metal conveyor belts are highly effective due to their high percentage of openings, making them ideal for various tasks such as coating, cooking, baking, and drainage applications. Their mesh can be adjusted to accommodate products and parts of diverse sizes and shapes. For tasks requiring air flow, metal conveyor belts are preferable as they can be designed with openings of various sizes to meet specific application needs.
One of the properties of metal conveyor belts that has made them so popular is their ability to withstand
Metal conveyor belts are crucial in industries that involve extreme temperatures, whether hundreds of degrees high or fluctuating between very hot and very cold. Their durability under such conditions makes them indispensable for applications like food processing, metal component sintering, and the coating of various components. While their high-temperature tolerance is widely recognized, metal conveyor belts are also uniquely suited for applications where components face a range of temperature extremes that other materials cannot endure.
Metal conveyor belts are adaptable for various settings, making them ideal for transporting materials over long distances, even when obstacles are present. These belts can be modified to navigate around or under barriers, ensuring seamless and efficient movement without interruptions.
Metal conveyor belts are highly valued for their excellent strength-to-weight ratio, making them ideal for transporting bulky or heavy materials with ease, using wire mesh or metal plates. Crafted from thin, lightweight components, these belts are built to withstand the demands of tough and challenging applications. They are commonly used in environments where durability, strength, and resilience are crucial factors.
Manufacturers of metal conveyor belts collaborate extensively with clients to design customized solutions that address unique conveying requirements. This process involves selecting materials that are versatile enough to adapt to different environmental conditions. Metal, in particular, has proven to be a highly adaptable material, suitable for a wide range of applications from mining operations to the production of automotive engines.
In the 1700s, early conveyor belts were constructed from leather and placed on wooden platforms. These manually operated systems were limited in their ability to transport only light materials over short spans. However, with technological advancements, conveyor belts have evolved significantly, now capable of moving items across long distances efficiently on smooth surfaces.
Industries that involve transporting goods within a facility rely on conveyor belts for reducing labor and operational costs. In manufacturing environments dealing with high temperatures, heavy materials, and sharp items, metal conveyor belts are essential for maintaining safety, protecting products, and ensuring operational efficiency.
Food production involves various processes such as mixing, blending, cooking, cooling, and packaging. Historically, the food industry relied on multiple ovens to prepare large quantities of products. This method was both time-consuming and labor-intensive, requiring meticulous handling and protective gear.
During the mid-20th century, a revolutionary advancement in food preparation was introduced at a pizza parlor: the metal oven conveyor. This innovation significantly enhanced the efficiency of baking and food preparation. What started as a modest solution has evolved into an essential tool for safely handling a wide range of food items, from baked chicken to diverse vegetables. Among the various sectors utilizing metal conveyor belts, the food industry has reaped the most substantial benefits from this advancement.
Scrap handling conveyors need to accommodate a diverse range of scrap metal sizes, from tiny fragments to large pieces equivalent to the size of refrigerators. These conveyor belts serve multiple purposes: protecting workers, efficiently transporting scrap metal, and feeding furnaces. Designed with an appropriate pitch, scrap metal conveyor belts ensure secure movement of scrap to the furnace. Due to the demanding nature of scrap metal processing, only metal conveyor belts can withstand the harsh conditions of this operation.
Conveyor ovens play a crucial role in manufacturing durable parts and components. They are engineered to efficiently preheat, cure, bond, dry, and heat treat large quantities of workpieces. These ovens utilize metal conveyor belts that must withstand temperatures up to 260°C (500°F) over extended periods. In addition to enduring high temperatures, these belts are subject to continuous loading and unloading, demanding exceptional performance even under the most demanding conditions.
Metal conveyor belts are indispensable in various sectors, far beyond the examples provided. Their robustness and reliability make them crucial in industries such as food processing, pharmaceuticals, and automotive manufacturing. These belts play a key role in enhancing production efficiency across multiple fields.
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