Apparatus and method of processing corrugated cardboard blanks for making cardboard boxes

摘要

The corrugated cardboard comprises two outer layers of flat material and at least one inner layer of corrugated material forming inner flutes between said two outer layers. Each of said corrugated cardboard blanks (P) comprises at least one through hole (A) which leaves exposed in the edge thereof openings in communication with said inner flutes. The method comprises the steps of injecting an amount of glue into said inner flutes of the corrugated cardboard blank (P) through the openings exposed in the edge of the hole (A), and then pressing the outer layers of the corrugated cardboard blank (P) against one another in a region (B) around the hole (A) with a pressure sufficient to flatten the corrugated inner layer. The apparatus comprises glue injection means in connection with a nozzle and pressure means for implementing the method.