Conveyor Belts

Steel Cord Conveyor Belts

As conveyor systems get longer, and handle increased volumes and tonnage, the belt itself needs to get stronger. Steel cable delivers higher strength, and decreased elongation compared to fabric; and steel cord belts deliver cheaper and more reliable performance for any system with long conveying distances or high lifts.

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Benefits

• High Strength: When the belt operating tension has to be higher than KN/m, belts reinforced with steel cord are the only alternative; and there are steel cord belts designed for ratings up to KN/m. Steel cord belts are also an economic alternative to fabric belts with ratings between KN/m and KN/m.
• Lower Factor of Safety: Fabric belts are designed with a factor of safety of 10, but the factor of safety is only 6.67 for steel cord belts. This means that a fabric belt can be replaced with a steel cord belt of a smaller rating, which provides a lifetime savings to the operator.
• Shorter Takeups: the elongation of a material depends on its elastic modulus; and the superior elastic modulus of steel cord; elongation can be less than 0.25%; which allows for smaller takeup lengths.
• Long Centre Distances: Steel cable has much lower elongation than fabrics, and this, in addition to the strength, lets belts be designed with long distances between pulleys; and takeups and transfer points are less constraining.
  
• Smaller Pulley Diameters: With a much thinner carcass than a fabric belt of the equivalent rating, steel cord belts can be run on pulleys with smaller diameters, which leads to energy savings. The superior dynamic modulus of steel over fabric means that fatigue is much less.
  
• High Impact Resistance: Typically, steel cord belt design leads to a greater proportion of rubber in the whole belt compared to textile conveyor belts. Additional rubber means that impact energy is better absorbed by the belt; making steel cord belts a good choice for any application where there can be sudden heavy individual pieces.
• Excellent Troughability: Even the highest rated steel cord belts trough perfectly on deep troughed idler sites. This ensures easy belt training, and gives the belt a larger effective capacity; allowing the user to either increase throughput, or use a narrower belt.
• Long Life Expectancy: Steel cord belts can be supplied with a thinner carcass and thicker cover rubber for the same rating as an equivalent fabric belt; which increases the belt life. The carcass also has a greater life than an equivalent fabric carcass.
• Splice Life and Strength: Properly provided belt splices can last as long as the Belt itself. They can also achieve spliced strength equivalent to almost 100% of the strength of the Belt.
• Easy Reconditioning : Steel cord belts can be repaired with hot or cold vulcanization and the damaged edges can be restored to their original width by hot repair. Worn out covers can be replaced with fresh rubber, durable enough to completely rejuvenate the belt, delivering even greater economy for the customer.

Range

Standard Steel Cord Range (DIN )

ST RatingRecomm-ended Cord Dia (mm)Pitch (mm) ±1.5Belt WidthMinimum Recommended Pulley Diameters (mm) for MAWT utilisation > 60%ABC.................

Standard Steel Cord Range (AS )

ST RatingRecomm-ended Cord Dia (mm)Pitch (mm) ±1.5Belt WidthMinimum Recommended Pulley Diameters (mm) for MAWT utilisation > 60%ABC.613..813...113..313..815...315..515..815..517..917..417..817..419...619..219..819..419...819..

Key Clients

Steelcord Conveyor Belt Construction

The Continental steelcord belt families Phoenix Phoenocord and Flexsteel provide superior impact resistance, with the number and size being selected to meet the desired operating tension and application needs. The insulation gum is specifically designed to encapsulate each steel cord filament to reduce internal friction while providing enhanced adhesion to the cover rubbers. Top and bottom covers provide maximum protection to the steel cord. The cover compounds are specifically designed to meet the demands of the application and are available in a wide variety of rubber types and gauges.

There are four component parts of Phoenix Phoenocord and Flexsteel belting, each one critical to belt performance.

Zinc galvanized steel cord

Phoenix Phoenocord are designed by selecting cord construction to provide the best specification for a particular application. The cords, made up of many wire filaments, are constructed to provide high flexibility, low elongation and permit efficient and high-strength splice designs. The galvanized zinc coating produces a bonding agent between the cord and insulation gum and provides an important barrier against corrosion.

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Insulation gum (core rubber)

Extensive rubber compounding technology has enabled Phoenix Phoenocord engineers to develop a superior insulation gum bonding rubber, which penetrates and adheres to the steel cords. The result is excellent adhesions, corrosion resistance and splice efficiencies.

Top cover breaker

Provides additional localized puncture resistance from heavy impact loads that can lead to premature carcass damage.

Bottom cover breaker

Provides additional localized puncture resistance from trapped material that can lead to premature carcass damage.

Outer rubber covers

The advanced compounds in the top and bottom of Phoenix Phoenocord covers are designed to protect the steel cord strength member against the abusive environmental conditions prevalent in most conveying applications. Compounds are available to withstand abrasion, jagged cutting and gouging, high impact, sub-zero temperatures, moderate heat, hardening effects of ozone attack and fire propagation.

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