How V-Guide Strips Can Help with Belt Tracking

Dotted V Guide Strips

To assist with positive tracking, a guide strip(s) is often used on the pulley side of conveyor belts. V–guides are the most common shapes used. However, square and rectangular shapes are also available. In addition, Sparks has designed and developed round dot-guides for traveling over very small pulleys.

.Tracking assistance is often required on:

  • Short, wide conveyors
  • Conveyors with side-loading
  • Reversing conveyors

Guide strips will not guarantee tracking success on a conveyor or conveyor belt that is poorly manufactured or lacking dimensional accuracy. The conveyor system and conveyor belt should be manufactured to reasonably track by normal means so that the use of guide strips can further ensure trackability.

The conveyor pulleys, bed and/or idler rollers should have an opening that is 1/4” wider and 1/16” deeper than the guide strip on the conveyor belt. Or conversely, the guide strip furnished on the conveyor belt should be 1/4” narrower and 1/16” shallower than the opening in the pulley, bed and/or idler rollers of the conveyor system. Guide strips are intended to improve tracking. They are not designed to drive the belt!

In general, a larger pulley is required when guide strips are used in conjunction with the belt. Smaller sized guide strips will operate over smaller pulleys better than larger guide strips. Guide strips made of softer durometer materials (i.e. PVC) will operate over smaller pulleys better than harder durometer materials (i.e. Polyurethane). Notched or segmented guide strips will navigate smaller pulleys better than solid guide strips.

Guide strips can be supplied down the center of the bottom of the conveyor belt or off-center to reduce wandering (side to side movement).

While it seems logical that two guides are better than one, it isn’t always true! Two guide strips require more precision in the conveyor design and in the placement of the guides on the belt. However, when two guide strips are required, the critical dimension is the center to center distance of the guide strips from each other. This is far more accurate (due to width tolerances in belting) than measuring from each edge of the belt to the center of each guide strip!

The Purpose of Textiles in Conveyor Belting

Conveyor belts are the driving force in conveying operations. There are many different types and materials for the abundance of applications in the market. However, there are a few different textiles that serve an important purpose in conveyor belting.

Purpose of Textiles in Conveyor Belting

  • Provides Strength for Tensioning
  • Provides Strength for Handling the Load
  • Adds Rigidity or Stiffness, “Gives it Body”
  • Improves Mechanical Fastener Retention
  • Improves Wear Against the Conveyor Bed
  • Reduces Sliding Drag on Product or Conveyor Bed

Types of Textiles/Fibers Used in Conveyor Belting

Natural:

Cotton & Wool

Solid woven cotton is often used in baking applications where belts must “breathe”, absorb, and/or handle warm products. It is also used in applications to handle warm, green rubber products. Cotton is used in length, width, or in both directions of multiple plied conveyor belting to increase the bulk of the overall product on applications which require resistance to impact without requiring high strength.  Most commonly, it is placed either on the top or bottom ply of multiple plied belts to provide lower drag against the conveyor bed or some conveyed products – like cartons.

Characteristics & Properties

  • Moderate Strength
  • High Bulk – a course, thick fiber
  • High absorbing
  • Low modulus – high elongation
  • Low cut and abrasion resistance
  • Moderate temperature resistance
  • Low mildew resistance

Man-Made:

Synthetic – Aramid, Nylon, Polyester 

Nylon:

A nylon core is used to provide high strength as required in some flour, paper, box, and wood applications for conveying products or transmission of power. It is used as the width fiber (fill yarn) in conveyor belting to increase rip resistance and fastener retention as well as to resist abrasion from building material products.

Characteristics & Properties

  • High Strength
  • High Elasticity – Stretch and Shrink
  • Moderately Absorbing
  • Moderate elongation
  • High Cut and Abrasion Resistance
  • High Mildew Resistance

Polyester: 

Solid woven polyester is used as a durable and low cost option for general conveyance, with specific uses in parcel, package, and baggage applications. Polyester is used in the length (warp), width (fill), or in both directions of the weave as an inexpensive carcass for multiple plied conveyor belting. Spun polyester generates less noise and is used when higher speeds are used on long(er) slider bed applications.

Characteristics & Properties

  • High Strength
  • Low Elasticity – Stretch and Shrink
  • Moderately Absorbing
  • Moderate Elongation
  • Moderate Cut and Abrasion Resistance
  • Low Temperature Resistance
  • High Mildew Resistance

Aramid (Kevlar):

Kevlar is used in glass applications where belts must withstand hot temperatures and retard flames, in heavy applications near industrial furnaces or conveying hot products being discharged from heat processes, and in heavy applications where resistance to high or heavy impact is important.

Characteristics & Properties

  • High Strength
  • High Bulk – A Coarse, Thick Fiber
  • High Modulus – Low Elongation
  • High Flame Resistance
  • High Impact Resistance
  • High Temperature Resistance

Blending of Textiles

A blend of textiles is often used to gain the benefits of a variety of features that provide solutions and enhance belt 

Folder Gluer Machine Feeder Belts

Folder Gluer Machine Feeder Belts

Folder Gluer Belts…

Perfect offers Folder Gluer & feeder belts for packaging & gluing machines, box folding & corrugated cardboard industry. These belts exhibit:

  • High co-efficient of friction for exceptional gripping
  • High dimensional stability
  • High resistance to abrasion, oil & solvents.
Technical Specifications
Grade Construction Traction Layer Total Elongation Min Pulley
  Top Cover Bottom Cover   Thickness at 1 % strain Dia
  Material Colour Material Colour   mm N/mm mm
PT-30 NBR Light Green NBR Yellow Polyamide 3.00
3.7
30.00
PT-40 NBR Light Green NBR Yellow Polyamide 4.00
3.9
40.00
PT-50 NBR Light Green NBR Yellow Polyamide 5.00
7.0
60.00
PT-60 NBR Light Green NBR Yellow Polyamide 6.00
7.0
60.00

NBR:    Nitrile Butyl Rubber

We also offer Customized Belts Grades.
All above products can also be supplied in Toray Polyamide Sheet imported from Japan.

 

WhatsApp chat
We are Offline
We are Offline ×

Are you sure you want to quit ?

Yes No

Please wait..
Thank you for contacting us, We will be in touch shortly.
This message will appear when chat is set in offline mode

Thank you for chatting with us !

Chat Again