Material flow options for treads
One of the main challenges for the design of the booking system is to bring the treads in the correct orientation.
In order to feed the treads in the right direction into the automatic booking system the flow of material coming from the extrusion line has to be individually planned.
Depending on the requested cycle output, various combined options may be used.
Angular Transfer Station with Vacuum-Flipping
The vacuum-turner flips the bottom side of the incoming treads. While doing so, the arms of the turner equipped with vacuum suction cups dive through the spaces of the feeding roller conveyor in order to suck in the pre-positioned treads from below. The treads are then turned at an angle of 90° and positioned on a transversal belt conveyor. A performance of a cycle output of up to 2, 4 seconds can be achieved.
Angular Transfer Station with Lateral Transfer Station
When operating with high cycle times the lateral transfer station gets as well as the vacuum turner into action, but the tread is not turned. The arms of the lateral transfer station dive through the feeding roller conveyor and take up the tread from below. During this process the tread is kept in constant balance. The tread is transferred in the same orientation to the transversal belt conveyor at an angle of 90°.
Angular Transfer Station
When manufacturing with cycle times greater than 3 (three) seconds, an angular transfer station may be used instead of the lateral transfer station. The roller distance and the distance of the transferring belt conveyor are narrow enough to guarantee a safe transport and support without deforming or stretching the treads.
Batch Turning Device with Rake
The batch turning device is integrated into the angular transfer conveying line in automatic booking system direction. This system collects first a complete batch on the transversal belt conveyor for one side of the booking system.
Two rakes with separate lifting and lowering functions are installed to a rotatable column. One rake lifts the batch and turns it by 180° whilst simultaneously a previously taken up batch is placed down. This solution with two synchronically working rakes guarantees a high cycle output.
Batch Turning Device with Transversal Belt Conveyor with Lifting and Lowering Function
This system is also first collecting a complete batch on the transversal belt conveyor for one side of the automatic booking system. One transversal belt conveyor with lifting and lowering function is integrated into the cross conveying line in automatic booking system direction.
The batch collected is taken over, lifted by the transversal conveyor and placed down again. This solution allows a rotation of the charge as well as a conveying of the charge through without turning.
A simple but efficient solution for turning and handling the treads is the boomerang. The treads are conveyed by means of a boomerang from one level to a second level. By doing so the bottom side of the tread is flipped and the treads’ orientation has turned.
Aligning of Treads
In some cases it makes sense to align the treads upstream of the angular transfer station in longitudinal direction before they are crosswise conveyed. With little space the aligned treads can be collected to a charge. By this means, a small packing density can be obtained.
The alignment is accomplished by means of an INTRALOX-conveyor with cross rolls and a synchronously travelling upright belt conveyor. This belt conveyor can be adjusted to the tread width by using the axle.