PRODUCTION METHOD FOR PERFORATED AGRICULTURAL FILM ROLL AND AGRICULTURAL FILM ROLL DRILLING DEVICE

摘要

PROBLEM TO BE SOLVED: To provide an agricultural film roll drilling device capable of automatically drilling an agricultural film as it remains rolled even when being rolled.SOLUTION: A drill holding part 13 inserts a drill part 11 into a roll 3 while rotating the same to repeat drilling down and drilling up, thereby opening a hole in the roll 3. At this time, drilling down is deepened gradually by a unit depth. Gradually deepening a hole in this way by repeating interruption and resumption enables the hole to be opened automatically by preventing films from being welded with each other even when an agricultural film is rolled.SELECTED DRAWING: Figure 1