METHOD AND MACHINES FOR TRANSFORMING INITIAL SEALED PACKAGINGS INTO IRREGULAR CUBIC OR POLYHEDRAL PACKAGINGS BY MEANS OF SEALING AND CUTTING FLAPS

摘要

The aim of the invention is to transform an initial packaging consisting of a flexible material such as roll film and sealed by at least two welded joints with a liquid substance inside, into a packaging having a cubic shape with at least three faces. The method and installation using a machine comprise the following steps: 1 - the initial packaging is blocked and immobilised by means of holding clamps which maintain a constant pressure at all times, towards the inside of the initial packaging, but with regulatable damping; 2 - an impact clamp (6) hits any of the edges or sides of the initial packaging head-on, so that the packaging inflates, thereby taking on the cubic shape, and the flaps are created; and 3 - the flaps are then sealed and cut. The most significant advantages of the invention are that very small cubic packagings can be produced, and at the same time the logistical costs are reduced as a result of the absence of flaps.