Spreading roller systems guarantee high quality in each process step

Constant tire cord width and uniform thread distribution are key factors in top-quality tire production. Tire cord is first impregnated and stretched in hot-stretching systems, after which it is fed to a calender for the rubber coating process. Here, it is important that the web is always run with the same width and a constant thread distribution through the individual process steps. The spreading rollers and systems from Erhard+Leimer meet these requirements. 

Function

Two curved spreading rollers that are split in the middle form the basis of the web width control system. Depending on the pivot angle, the two mechanically coupled rollers either stretch or compress the tire cord.

Area of use

In particular on calender lines or in hot-stretching lines ahead of the rewinding section, the use of spreading rollers is essential in order to ensure uniform thread distribution.

Application

The CordAliner spreading system can be mounted in all positions. The infeed length should be at least half a web width, and the outfeed length should be kept as short as possible. 

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Function 

The spreading system XPander comprises two roller units each with three rollers. Each side has two fixed rollers and one movable roller. The width of the cord can be controlled by varying the immersion angle of the movable center rollers. Spreadability can be optimized by manually adjusting the correction angle.

Area of use

XPander spreading systems are used exclusively in hot-stretching plants ahead of the pulling station in order to achieve consistent web width and uniform thread distribution.

Application

The XPander spreading system can be mounted in all positions. The infeed length should be at least half a web width, and the outfeed length should be kept as short as possible.

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Function 

The EPILiner edge spreading system comprises two spreader units, each of which has a three-finger roller arrangement. The two fixed rollers are always in contact with the cord, and the movable roller dips in in the edge area of the cord. The width of the cord can be controlled by varying the roller immersion angle. Spreadability can be optimized by manually adjusting the correction angle. 

Area of use 

In particular, on calender lines ahead of the calender gap, or in hot-stretching lines ahead of the dip or ahead of the rewinding section, the use of an edge spreading system is essential in order to ensure uniform thread distribution. 

Application

The EPILiner edge spreading system can be mounted in all positions. The infeed length should be at least half a web width, and the outfeed length should be kept as short as possible. Optimum web width control can only be achieved with the aid of a web guider arranged in the run-up. 

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