grid belt conveyors
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NIEIRIAIK FORDERTECHNIK

Cooling lines with bar grid conveyors for unvulcanized rubber When processing unvulcanized rubber, the quality of the starting material and the intended use of the finished rubber product are of decisive importance for the mixing ratio, the mixing process and the shaping of the material into strips, sheets or slabs. Prior to their intermediate storage, the shaped profiles or sheets are cooled down from a processing temperature of 90 - 120 "C to approx. 35 - 40 ”C. NERAK cooling lines for unvulcanized rubber ensure an even cooling of the product. Any partial vulcanization due to residual...

Examples of design and application: After having been shaped on the extruder, the unvulcanized rubber tread is led via a checking and marking unit to the cooling line. This constructional unit is floor-mounted. When the cooling line is arranged on supports, the surface area it occupies in the production hall is limited. Moreover, all units that are arranged further upstream or downstream from the cooling line are positioned very close to each other, which ensures a very easy and efficient operation. Cooling lines for the production of thin profiles and sheets take over the product right...

The cooling agent can be supplied as follows: As cooling by immersion in water is a very cost-effective solution, this is the most frequently chosen process. This type of cooling is highly efficient. Moreover, the lifting force of the water allows the strips or sheets to be treated very gently, without causing them to float on the water surface. A further advantage consists in the easy accessibility of the troughs which are open towards the top. The product can thus be checked at any position. Energy, maintenance and service costs are relatively low as compared to other constructions. This...

Determination of the cooling section length The length of a cooling line is dependent on the necessary residence time of the unvulcanized rubber in the cooling section and can be determined by special calculation programs. Drive Bar grid conveyors are generally driven by variable speed drives. When processing continuously extruded strips, the belt speed has to be scanned at the free loop at the beginning of the belt. The scanning roll transmits a switching signal to an electric control unit which increases or reduces the belt speed as required. Scanning rolls (rocker arms) are arranged at...

As a matter of course, we also deliver single NERAK bar grid conveyors and accessories that are to be integrated into existing lines or needed to realize the customer's own concepts. NERAK bar grid conveyors Sturdy, reliable and proven in practice General description The bar grid conveyor is free from joints and composed of two or more rubber block chains that are arranged in paralled and connected by polyester bars. The top side of the bars supports the product to be cooled. The product surface is thus evenly surrounded by the cooling agent from all sides. Combined with the toothed drive...