Cement Americas

WIN 2019

Cement Americas provides comprehensive coverage of the North and South American cement markets from raw material extraction to delivery and tranportation to end user.

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www.cementamericas.com • Winter 2019 • CEMENT AMERICAS 21 FEATURE This trustful relationship is not surprising. BEUMER Group had already supplied an extensive major order for a plant in the state of Puebla. BEUMER provided and installed five bucket elevators and two palletizing and packaging lines in only 26 months. They consist of BEUMER paletpac palletizers and the BEUMER stretch hood high-capacity packaging systems. As with the current project, one of the requirements for this line was to palletize and package various bagged materi- als, without extensive retrofitting of the machines. Luna emphasized that BEUMER Group provided them with an adaptable technology with which his colleagues are work- ing efficiently to this day. Filling Technology BEUMER Group presented the BEUMER fillpac R filling system to Cruz Azul. "Changing the required parameters is simple and quick and the different material is filled effi- ciently into two- to four-ply paper valve bags," said Ralph Buchholz, director general at BEUMER de México. Both companies quickly agreed on the scope and schedul- ing for the entire packaging line, and signed the contract. "Cruz Azul attaches greatest value to the quality seal 'Made in Germany'," explained Buchholz. "Those responsible for the project even traveled to our headquarters in Beckum, Germany, to accept the systems in person." In October 2015, the BEUMER Group provided the sys- tems. Three BEUMER employees from Germany and one from Mexico were in charge of installation. "We had to integrate the line into the existing building structure and bulk storage technology," reported Buchholz. "My col- leagues mastered this challenge because our solutions can be easily adapted to technical and structural conditions." In this case, the engineers had to rework the suspension for the BEUMER fillpac. Precise Degrees of Filling The BEUMER fillpac R operates with eight rotating filling spouts, according to the impeller filling principle. This way it can safely handle even fine-grained tile mortar. The rotating filling impeller is characterized by its speed and maximum material throughput. "The bags are weighed during the filling process," said Buchholz. The BEUMER fillpac is equipped with an electronic calibra- tion-capable weighing unit. It ensures that the bags are always filled with the same amount of material. A special software enables filling spouts and scale to con- stantly compare the weight. If the determined weight is incorrect, the bags are automatically removed, discharged on a chute and opened. The collected material is fed back into the process via a spillage screw conveyor and a bucket elevator. The system has a modular structure. "We equipped the sys- tem with the new BEUMER bag placer because the material is so fine and volatile," said Buchholz. A ream magazine for 700 bags was also added. This allows Cruz Azul to further increase the efficiency of the filling sys- tem. Servomotors drive the application unit and the suc- tion gripper automatically, precisely and energy-efficiently. The gripping system and the application unit apply the bag from the stack safely onto the filling spout. The system can pack 1,800 25-kg bags or 2,250 20-kg bags per hour with the highest precision. "The operator can also adjust the BEUMER bag placer to other bag formats," said Buchholz. For the subsequent fully automatic, reliable and, most of all, fast palletizing, BEUMER Group installed a BEUMER pal- etpac layer palletizer. Per hour, it gently and reliably stacks 2,200 bags in 10-bag patterns or in 8-bag patterns on pal- lets of 1,220 x 1,020 x 245 millimeters in size. "A twin-belt turning device brings the bags in the required, dimensionally stable position," said Buchholz. The position accuracy of this device offers a great advan- tage compared to conventional turning machines, because the system's components move the bags without mechan- ically deforming them: two parallel driven belt conveyors move at different speeds and turn the bags quickly into the desired position.

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