Double-walled beaker and a method for producing same

摘要

The invention relates to a method for manufacturing a double-walled beaker (1) with an outer shell (2) and an inner shell (3) arranged therein, which method comprises the following steps of: providing a strip of plastic (11); at least partially heating the plastic to at least the softening temperature; forming inner shells (3) and outer shells (2) in the softened part; punching out the inner shells (3) and outer shells (2); both inner shells (3) and outer shells (2) are punched out with the same punch die (16). In addition, the invention relates to a double-walled beaker (1) comprising an outer shell (2) with a bent first edge and an inner shell having a bent second edge (5) and being placed in the outer shell (7), wherein the first and second edges (4,5) are curled together, wherein the inner main dimension of the opening formed by the first edge together with twice the length of the first edge is substantially equal to the inner main dimension of the opening formed by the second edge together with twice the length of the second edge. <IMAGE>