Flexible lightweight container

A process for the manufacturing of a lightweight container (1) comprising a base (3), four sidewalls (2) and four corner portions each comprising a pre-cut sheet (10), the corner portions being so arranged as to allow flexibility between adjacent sidewalls (2) so that an upper opening area of the container (1) can be made smaller by forcing the sidewalls (2) towards each other and so that the upper opening area of the container (1) can be made larger by forcing the sidewalls (2) apart;

• that said base (3) and said sidewalls (2) form a carrying framework (20) of the lightweight container (1), wherein at least two adjacent sidewalls (2) are provided with vertical edges, said vertical edges being connected via one of the pre-cut sheets (10) which will act as a hinge allowing a predetermined amount of flexibility in the corner portion between the two adjacent sidewalls (2);
• the process comprising the steps:
• inserting the pre-cut sheets (10) into a mold, the mold being provided with windows to hold the pre-cut sheets (10) in place during molding;
• closing the mold and injecting thermoplastic material into the mold to form the sidewalls (2) and the base (3) of lightweight container (1), the mold further comprising cavities shaped as channels, the channels bonding the pre-cut sheets (10) to the lightweight container (1), the channels forming the carrying framework (20) of the lightweight container (1).