Break roller systems

Good briquettes discharging from the presses are surrounded by a flash which is produced on the land areas between the pockets on the rollers (see Section 4.2.2.4.7). These flashes break off during handling and are separated on the screens (17 and 20) producing so-called chips—relatively hard, compacted particles that require crushing prior to feeding back into the system. 

The product from the compaction process is the flake. The thickness of the potash flake varies from plant to plant but on average is about 20 mm. After compaction the flake is cured in the conveying system. For potash the normal design of the plant provides about 3 minutes of curing time. The flake is broken into smaller pieces immediately below the roller. Pin-type breakers and coarse tooth roll crushers are used to break the flakes. 

For an optimal consolidation it is necessary to apply a consolidation pressure in the winding process. After the polymer is molten the rovings/tapes are wound (with consolidation pressure) on the mandrel. Generally, there are two different ways to apply the required consolidation pressure. In the first system the consolidation force is applied only with the tape tension as a result of the break system used (Fig. 7.6). The acting consolidation pressure depends on several factors, besides the acting tension, for example material temperature and viscosity, and the consolidation zone is not well defined. Furthermore, the applied tape tension can induce significant residual stresses in the component. The consohdation roller of the second system apphes... 

A two component, PUR laminating adhesive system for panel construction, for extrusion or roller application, offering little or no foaming tendency and a very high elongation to break. 

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