Feeder module for box-making machine

Abstract

The present invention relates to a feeder module (12) for a box-making machine (1), wherein the feeder module (12) is configured to transport only the sheet located at the bottom of the stack to below the front stopper at one time. The feeder module includes a suction bar (28) configured to apply suction to the underside of the sheet and guide the sheet to below the front stopper, the suction bar comprising a first group (36) of air openings configured to apply suction to the sheet and a second group (40) of air openings configured to blow air onto the sheet.

Claims

1. A feeder module (12) for a box-making machine (1), A loading surface (24) configured to receive a stack of sheets (2), A front stopper (26) is configured to contact the front edge of the stack and to allow only the lowest sheet in the stack to be transported below the front stopper at once, A drive element (30) configured to move the bottommost sheet in the stack forward in the transport direction (T) below the front stopper, Equipped with, The feeder module includes a suction bar (28) configured to apply suction to the lower surface of the lowest sheet and guide the lowest sheet below the front stopper, The suction bar comprises a first group (36) of air openings configured to apply suction to the lowest sheet, and a second group (40) of air openings configured to blow air onto the lowest sheet. A feeder module in which a first group of air openings includes a plurality of suction openings (36'), and a second group of air openings includes a plurality of air blowing openings (40').

2. The feeder module according to claim 1, wherein the first group of air openings (36) and the second group of air openings (40) are arranged in a lateral direction (L) perpendicular to the transport direction (T).

3. The feeder module according to claim 2, wherein the first group of air openings (36) and the second group of air openings (40) are arranged alternately on the same line, and the suction opening (36') from the first group of air openings (36) is located between two air outlet openings (40') from the second group of air openings (40).

4. The feeder module according to any one of claims 1 to 3, wherein the airflow rate through the suction opening (36') is greater than the airflow rate through the air outlet opening (40').

5. The feeder module according to any one of claims 1 to 4, wherein the first group (36) of the air openings is provided with a funnel-shaped inlet.

6. The feeder module according to any one of claims 1 to 5, wherein the second group (40) of the air openings has an elliptical orifice.

7. The feeder module according to any one of claims 1 to 6, wherein the absolute value of the negative air pressure (P1) at the orifice of the suction opening (36') is smaller than the absolute value of the positive pressure (P2) at the orifice of the air outlet opening (40').

8. The negative air pressure (P1) in the air duct (51) connected to the orifice of the suction opening (36') is between 3000 Pa and 5000 Pa, preferably about 4000 Pa. A feeder module according to any one of claims 1 to 7, wherein a positive pressure (P2) exists in the air supply duct (50) connected to the air outlet opening (40'), and is between 200,000 and 500,000 Pa, preferably about 400,000 Pa.

9. The feeder module according to any one of claims 1 to 8, wherein the suction bar comprises an air conduit and a plurality of inclined channels (41) extending therefrom, and the inclined channels have outlets formed by orifices of the air blowout opening (40).

10. The feeder module according to claim 9, wherein the first group (36) of air openings is connected to a suction box that is also in fluid communication with air openings (52) around the drive element (30) on the loading surface (24).

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