Some guidelines to follow to perform an adequate flanging

1. After forming the body of the container, the flanging operation is performed. In the case of cylindrical containers, it is carried out after diameter reduction.

2. The flange is formed at each end of the container body and is necessary to join the body to the lid or bottom. It is composed of a flat part, almost perpendicular to the wall of the container, and an arc that joins this flat part to the body.

3. The flanging operation can be carried out in different ways, depending on the type of container and the machinery used. Some common techniques include spin lashing, in which a rotating head is used to form the tab, and buffer squeeze lashing, in which a head is used to press the tab against the body of the container.

4. During flanging, the inner diameter of the container is calibrated at the ends of the cylinder (in the case of round containers) or the internal dimensions if it is a rectangular, oval or other non-cylindrical body. This recalibration is achieved by slightly flaring the extremities of the body.