This invention relates to conveyor systems having power-driven conveyor sections and, more particularly, to apparatus for accumulating conveyed articles along a conveyor line as the upstream supply of articles exceeds the downstream demand. One of the most common article accumulation systems used on conveyor lines is the bi-di bidirectional table. Typically, a bi-di table includes a bidirectional conveyor belt arranged to run perpendicular to a main conveyor belt running along a portion of the main conveyor line. As the upstream supply of articles exceeds the downstream demand, articles build up on the main conveyor belt. Backpressure from the backed-up mass of upstream articles pushes articles onto the bi-di table, which runs in a direction away from the main conveyor line to make room for more of the excess articles. As the downstream demand increases, the direction of the bi-di belt is reversed to push the articles accumulated on the bi-di table back onto the main conveyor belt to meet the downstream demand.

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No other warranty is expressed or implied unless otherwise set forth in writing and approved by a representative duly authorized to extend such approval by Intralox, LLC. If exposed to an open flame or to temperatures above Intralox specifications, these products may decompose and emit toxic fumes. Do not expose Intralox conveyor belting to extreme temperatures or open flame. Flame retardant belt products are available in some series.

Contact Intralox. Intralox, LLC warrants products of its own manufacture for a period of one year from date of shipment to the extent that Intralox, LLC will repair or replace any products of faulty material or defective workmanship proven under normal use or service. Intralox, L. Other U. A subsidiary of the Laitram, LLC. All rights reserved worldwide. Intralox is a registered trademark of the Laitram, LLC. Bricklayed modules. With more than 40 years experience, Intralox continues to lead the way in helping customers achieve their goals by offering comprehensive conveyance solutions that create significant economic value.

Intralox delivers innovative, premium technology within a direct business model and a global, industry-specific structure. Working with Intralox allows you to experience our uncompromising commitment to providing solutions and solving problems for our customers. We pushed past the boundaries of traditional conveying systems with the revolutionary invention of modular plastic belting, and continue to move beyond industry standards with new products, equipment, solutions, and services.

Intraloxs commitment to innovation has led to over patents currently in force around the world. If our customers have a need, we invent smart solutions to solve them. Because of modular construction, Intralox belts can be made in almost any width from three links wide. Each belt style incorporates several distinguishing features. Hinge and edge features are described below. Surface, pitch and drive features are described in detail in Belt Selection Process page 5. These are assembled into interlocked units and joined by plastic hinge rods.

Except for narrow belts one complete module or less in width , all are built with the joints between modules staggered with those of adjacent rows in a bricklayed fashion. This structure interlocks the modules, giving the belt inherent lateral strength. The hinge rods do not hold the belt together from side to side, but act only as pivot members in shear. The belt that results from this construction process is intrinsically strong, both laterally due to the bricklaying, and longitudinally due to the rods being placed in multiple shear.

They reduce the possibility of product, or belt, snagging on the frame. DRIVE METHOD shafts transmit torque rotational force without the need for troublesome keys and keyways, they accommodate the lateral expansion differences of the plastic belt material and the metal shafts. Only one sprocket per shaft is retained. The others are allowed to float, moving along the shaft as the belt expands or contracts. Thus, the sprockets are always transmitting torque. Of all belt drive systems tested, the square shaft with square bore sprockets has proven to be the most effective, economical, reliable, trouble free and simple.

Intralox belts are positively driven by plastic or metal sprockets, not friction rollers. The sprockets, another part of the Intralox System, have square bores and are driven by matching square shafts. Note: Sprockets are available with round bores for special applications. Not only do square. Intralox conveyor belts are available in a variety of styles, materials and colors, with many accessory options. In order to make the appropriate selections when designing for a particular application, reliable information about operating and environmental conditions is critical.

Factors to evaluate include: The type of belt system: straight running, radius, or spiral The overall dimensions of the installed belt: length between driving and idling shafts, width, elevation changes The speed of belt travel The characteristics of the product to be conveyed: 1.

The type of drive system: 1. For more detailed information, see Section three: Design guidelines page Choose a Straight running, Radius, or Spiral belt system. Intralox belts and accessories are available in standard and special application materials. For complete descriptions of the standard and special application belt materials see, Standard Belt Materials page 20 and Special Application Belt Materials page Current telephone numbers are listed on the back cover.

For specific recommendations on chemical properties, see Chemical Resistance Guide page Intralox belts are available in 0. Smaller pitch reduces chordal action over similar size sprockets and the space required for product transfer. There are two drive methods used by Intralox: hinge-driven and centerdriven. Where back tension is an important consideration, drive method plays a significant role. Note: Unless otherwise noted, the belts have fully flush edges.

Note: Series Live Transfer edges are also available with bricklayed belts. For more information, see the data pages in Section 2 or contact Intralox Customer Service. Intralox offers belt styles in dedicated widths.

These products come in industry standard widths, and are available in 10 foot 3. Available width: 57 mm excluding tabs. Belt surface wear: As belts slide over carryways, returnways, shoes and other fixed members, some wear is to Analysis for straight running belts: be expected. The most destructive conditions are high After making a tentative selection from the Series and Styles speed, heavy loads, abrasive materials, and dry or non listed above, turn to the Belt Selection Instructions page 31 , lubricated operation.

Product Line, for instructions to determine the Belt Pull 3. Dynamic effects of high speed operation: Two and Adjusted Belt Pull for comparison with the Allowable effects of high speed conditions are belt whipping or Strength for that belt.

In order to make the necessary oscillating in unsupported sections and load surges as calculations for Belt Pull, gather this information: heavy, stationary products are suddenly accelerated to belt 1.

Where possible, both conditions should be avoided. Abrasives will wear away any material, but the correct material choice can significantly increase belt life. In highly abrasive applications, the hinge rods and sprockets are usually the first elements to be affected. Hinge rod wear typically results in excessive belt-pitch elongation. This may prevent proper tooth engagement, increasing the wear on sprocket teeth. Intralox offers Stainless Steel split sprockets and Abrasion Resistant rods that work to increase belt life.

This is due to These belts require a more complex analysis. The following chordal action, which is the rise and fall of a module as it additional information is required: rotates around a shafts center line. It is characteristic of all 9. The variation in speed is Hinge and sprocket wear: The frequency of module rotation about the hinge rods as the belt engages and disengages the sprockets is directly proportional to speed.

The rotary motion can cause wear to both rods and modules. This wear rate, however, is inversely proportional. Contact Customer Service for more information. Call Customer Service for availability and lead-times. Intralox, LLC Europe offers square shafts in standard sizes of 25 mm, 40 mm, 60 mm, 65 mm and 90 mm. Square shafts need turning of bearing journals only.

No keyways for sprockets are required. Only one sprocket per shaft must be retained to prevent lateral belt movement and to provide positive tracking. This is usually done by placing. In the second case, the shaft is being rotated by the drive motor. Resistance from the belts tension introduces torsional twisting stresses. These two types of stresses, maximum deflection and maximum allowable torque, are analyzed separately.

Simple formulas are provided for selecting appropriate shafts. Maximum deflection is governed by adequate belt and sprocket tooth engagement. If the shaft deflects more than 0. On bi-directional conveyors with center-drive, the limit is increased to 0. Proper choice of wearstrip design and material, yielding the best coefficient of friction, reduces belt and frame wear, and power requirements.

Any clean liquid, such as oil or water, will act as a coolant and as a separation film between the belt and the carryway, usually reducing the coefficient of friction. Abrasives such as salt, broken glass, soil and vegetable fibers will embed in softer materials and wear on harder materials.

In such applications harder wearstrips will prolong belt life. Self-set retainer rings and small bore round retainer Plastic belting may produce a static discharge or spark when rings are available which do not require grooves. Lubricating or adding moisture to the The two primary concerns regarding the strength of the conveyor running surfaces is also recommended. Electrically conveyor drive shafts are 1 the ability to pull the belt without Conductive Acetal is available in some belt styles.

Contact the excessive shaft deflection, and 2 the strength to transmit the Intralox Sales Engineering Department for additional torque for driving the belt. In the first case, the shaft acts as a recommendations. Call Customer Servicea to request these programs.


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