In the 1980’s a small artisan company starts to produces robot for packaging, equipped with rechargeable batteries and a feeler, which turned autonomously around pallets of any size, applying stretch film to stabilize the load. This innovative idea was later patented and widespread all over the world. Soon the company became well known as a world leader in semi–automatic machines for the application of stretch film for stabilizing pallet loads, developing a number of other machines to join the robot including: rotating tables, horizontal wrapping machines for elongated products, a ranges of shrink film packaging machines and taping machines. These automatic systems and machines are able to stabilize pallet loads with stretch film capable of catering for up to 100 pallets per hour, thanks to a range of high-tech solutions with excellent levels of productivity. The commercial success for every packaging machine is directly related to a correct balance between costs of equipments (as low as we can) and efficiency in processes (as high as it is possible). Regarding this second aspect, during the last years, the sector noticed a progression of technical solutions toward faster and faster machines. From an engineering point of view, one of the simplest way to speed up a machine is to take particular care to reduce inertial masses. This result can be obtaining modifying geometry or changing the material. This study is focused on the redesign and the optimisation of a pretension roller for the stretching of elastic film and the deposition on pallet. The pretension roller is a fundamental component inside the semi-automatic packaging machine permitting, coupled with other rollers, to accurately calibrate the ratio of stretching for the elastic film (reducing wastes of film), but also the wrapping up pressure on the pack (assuring the stability of pallet and the integrity of goods during the packaging process). Linear and non linear FEM analysis were used together with a theoretical modelling of physical conditions for the pretension roller. The hypothesis to substitute steel with aluminium was considered and accepted. A reduction in thinness and new solutions to guarantee the same level of friction on surface were taken in count.
Pavlovic, A., Fragassa, C., Radovani, A., Kostic, S.C. (2009). Design and Optimisation of Mechanical Solution for high speed components in packaging machines. Sofia : Todor University.
Design and Optimisation of Mechanical Solution for high speed components in packaging machines
PAVLOVIC, ANA;FRAGASSA, CRISTIANO;RADOVANI, ASTI;
2009
Abstract
In the 1980’s a small artisan company starts to produces robot for packaging, equipped with rechargeable batteries and a feeler, which turned autonomously around pallets of any size, applying stretch film to stabilize the load. This innovative idea was later patented and widespread all over the world. Soon the company became well known as a world leader in semi–automatic machines for the application of stretch film for stabilizing pallet loads, developing a number of other machines to join the robot including: rotating tables, horizontal wrapping machines for elongated products, a ranges of shrink film packaging machines and taping machines. These automatic systems and machines are able to stabilize pallet loads with stretch film capable of catering for up to 100 pallets per hour, thanks to a range of high-tech solutions with excellent levels of productivity. The commercial success for every packaging machine is directly related to a correct balance between costs of equipments (as low as we can) and efficiency in processes (as high as it is possible). Regarding this second aspect, during the last years, the sector noticed a progression of technical solutions toward faster and faster machines. From an engineering point of view, one of the simplest way to speed up a machine is to take particular care to reduce inertial masses. This result can be obtaining modifying geometry or changing the material. This study is focused on the redesign and the optimisation of a pretension roller for the stretching of elastic film and the deposition on pallet. The pretension roller is a fundamental component inside the semi-automatic packaging machine permitting, coupled with other rollers, to accurately calibrate the ratio of stretching for the elastic film (reducing wastes of film), but also the wrapping up pressure on the pack (assuring the stability of pallet and the integrity of goods during the packaging process). Linear and non linear FEM analysis were used together with a theoretical modelling of physical conditions for the pretension roller. The hypothesis to substitute steel with aluminium was considered and accepted. A reduction in thinness and new solutions to guarantee the same level of friction on surface were taken in count.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
