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Fast Process from Beginning to End for Cement Manufacturer
The Cooperativa La Cruz Azul S.C.L, the third-largest cement manufacturer in Mexico, required an entire packaging line for the flexible and fully automated filling, palletizing, and packaging of different types of new tile mortar.
The BEUMER Group solution won out over the competition, providing everything from one single source. This included the BEUMER fillpac R filling system that was adapted for filling different materials. They also included the BEUMER bag placer to ensure a more efficient filling of high-quality materials. With this new packaging line, Cruz Azul can achieve its projected production capacity.
Gigantic bridges, high-rises, tunnels for roads, subways, and sewage systems: some of the biggest construction projects in Latin America are currently being built in Mexico. This makes the country the second-largest cement market on the continent, right after Brazil. In order to hold their own against national and international competition, Mexican manufacturers are developing more and more high-class materials.
Cooperativa La Cruz Azul, headquartered in Mexico City, is one of them. The production of this leading company, founded in 1881, is aimed exclusively toward the domestic market. The manufacturer operates four plants with a yearly production of around eight million tons of Portland cement per year, which is only one of their end products. The main plant is in Jasso, Hidalgo; A region that is very rich in limestone.
Decisive Factors: Supplier Reliability and Quality
Success plays an important role for Cruz Azul as its cement production represents 22% of the national market. With the goal to further increase this share, the cooperative developed high-quality tile mortar in eight different variations as one of their new products.
"The quality of the building materials is decisive in order to remain competitive," explains Victor Luna, Managing Director at Cruz Azul in Hidalgo. Distributors and end customers also want the products to arrive by the required date and quantity. A small amount of the mortar is sold in big bags, the majority however is sold in 20 and 25-kilogram bags.
This is why the manufacturer needed an entire packaging line that could meet very specific requirements: due to varying material densities, and as a consequence different flow properties of the different variants of the new product line, the filling system had to be adjustable to the different materials as well as to smaller bag sizes without extensive retrofitting of the machine through the employees. The line should then palletize precise and stable bag stacks and package them to protect the content against transport damage and atmospheric influences.
Filling Technology Made in Germany
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 efficiently into two to four-ply paper valve bags," explains Ralph Buchholz, Director General at BEUMER de México. Both companies quickly agreed on the scope and scheduling for the entire packaging line and signed the contract already in April.
"Cruz Azul attaches the greatest value to the quality seal 'Made in Germany'," explains Buchholz. "Those responsible for the project even traveled to our headquarters in Beckum, Germany to accept the systems in person."
Three BEUMER employees from Germany and one from Mexico were in charge of installing the system.
"We had to integrate the line into the existing building structure and bulk storage technology," reports Buchholz. "My colleagues 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," explains Buchholz.
The BEUMER fillpac is equipped with an electronic calibration-capable weighing unit. It ensures that the bags are always filled with the same amount of material. Special software enables filling spouts and scales to constantly compare the weight. If the determined weight is incorrect, the bags are automatically removed, discharged on a chute, and opened. The collected material is then fed back into the process via a spillage screw conveyor and a bucket elevator.
The system has a modular structure. "We equipped the system with the new BEUMER bag placer because the material is so fine and volatile," says Buchholz. A ream magazine for 700 bags was also added to allow Cruz Azul to further increase the efficiency of the filling system. Servomotors drive the application unit and the suction 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-kilogram bags or 2,250 20-kilogram bags per hour with the highest precision.
"The operator can also adjust the BEUMER bag placer to other bag formats," explains Buchholz.
For the subsequent fully automatic, reliable, and most of all fast palletizing, BEUMER Group installed its paletpac layer palletizer. Per hour, it gently and reliably stacks 2,200 bags per hour in 10-bag patterns or in 8-bag patterns on pallets 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," explains Buchholz. The position accuracy of this device offers a great advantage compared to conventional turning machines because the system's components move the bags without mechanically deforming them: two parallel driven belt conveyors move at different speeds and turn the bags quickly into the desired position.
The intelligent control of the twin-belt turning device also takes the dimension and weight of the filled bag into consideration. Exact positioning, specified by the preset packing pattern, is achieved. "No adjustment is necessary even with a product change," says Buchholz.
Packed Fast and Safely
The finished bag stacks are transported over roller conveyors to the BEUMER stretch hood packaging system. It packages 110 pallet stacks per hour with stretch film hoods with film thicknesses ranging from 40 to 100 micrometers.
"It depends on the type of tile mortar," Buchholz explains. "The packaging protects the product against dust and humidity during storage and on long transport routes and ensures that the bags remain stable on the pallet without moving." In order to facilitate the work for the maintenance personnel and to ensure high system availability, the packaging system no longer needs a platform.
Maintenance work, such as changing the blades or the sealing bars, is handled at floor level. Additional benefits include the compact design and the resulting low height and small footprint.
"The BEUMER stretch hood A is extremely energy efficient," emphasizes Buchholz.
A film transport system, which is particularly gentle on the material, introduces the previously cut and sealed film hood into the system. The sealing seam already cools down on the way to the crimping and stretching unit. Crimping can start without any delay. This allows for the elimination of energy-consuming cooling units and efficiency-reducing cooling times. This way the pallets can be packaged at a high bag sequencing.
"The new BEUMER packing line brought the project to success," mentions Victor Luna. This means that the cement manufacturer can reach its projected production capacity. In order to ensure a trouble-free operation, the system supplier's competent specialists stay in close touch with the customer and help out immediately in case of malfunctions or downtimes. BEUMER Group also provided the necessary spare parts. Ensuring high availability of the systems at all times.
Victor Luna is visibly very pleased with the new solution because this packaging line is tailor-made for their needs. He's particularly impressed by the flexible filling technology. It saves a lot of time and brings great peace of mind, the different types or mortar are getting to the customer a lot faster. With this project, BEUMER Group has installed the first BEUMER fillpac R on the American market.
