METHOD FOR OPERATING A BAGGING MACHINE

Abstract

The invention relates to a method for operating a bagging machine (01) having at least one vibration sensor (15, 18, 19) and a vibration evaluation device (16), wherein airborne and/or structure-borne signals can be measured with the vibration sensor (15, 18, 19), and wherein the measurement signals of the vibration sensor (15, 18, 19) can be evaluated with the vibration evaluation device (16), wherein

a) airborne and/or structure-borne signals produced by the filling material during operation of the bagging machine (01) are measured with the vibration sensor (15, 18, 19) on the format tube (06),

b) the measurement signals of the vibration sensor (15, 18, 19) are evaluated by the vibration evaluation device (16),

c) a function signal is output depending on the evaluation results.

Claims

1. A method for operating a bagging machine (01) with a film web (03) that can be unwound from a supply roll (02), a forming shoulder (04) for forming the film web (03) into a film sleeve (05), a film outlet (07) that acts against the film sleeve (05) for further moving the film sleeve (05), a vertically aligned format tube (06) for receiving and filling the film sleeve (05) with a filling material (12), a longitudinal sealing device for welding the film sleeve (05) parallel to its transport direction by means of a cross seam, a cross sealing device (08) with cross jaws (09) that can be moved against each other and weld the film sleeve (05) transverse to the transport direction to generate cross seams, a separating device (11) for separating finished bags (10) from the film sleeve (05), and with at least one vibration sensor (15, 18, 19) as well as a vibration evaluation device (16), wherein the vibration sensor (15, 18, 19) can be used to measure airborne or structure-borne sound signals, and wherein the vibration evaluation device (16) can be used to evaluate the measurement signals of the vibration sensor (15, 18, 19), wherein a) during the operation of the bagging machine (01), airborne or structure-borne sound signals generated by the filling material are measured with the vibration sensor (15, 18, 19) on the format tube (06), b) the measurement signals of the vibration sensor (15, 18, 19) are evaluated by the vibration evaluation device (16), 0 c) a function signal is output depending on the evaluation results.

2. The method according to claim 1, wherein the vibration sensor (15) is arranged at the upper end of the format tube (06) under a preformatting container or funnel (14), wherein the vibration sensor (15) is used to measure the airborne or structure-borne sound signals generated by the filling material in the preformatting container or funnel (14).

3. The method according to claim 1, wherein the vibration sensor (18) is arranged between the upper end and the lower end of the format tube (06), wherein the vibration sensor is used to measure the airborne or structure-borne sound signals generated by the filling material (06) as it passes through the format tube (06).

4. The method according to claim 1, wherein the vibration sensor (19) is arranged at the lower end of the format tube (06) above a cross sealing unit (08), wherein the vibration sensor (19) is used to measure the airborne or structure-borne sound signals generated by the filling material as it hits the cross sealing jaws (09).

5. The method according to claim 1, wherein the vibration sensor (18) is arranged in the area of a preformatting flap (17), wherein the vibration sensor (18) is used to measure the airborne or structure-borne sound signals generated by the filling material as it hits a preformatting flap (17).

6. The method according to claim 5, wherein a function signal is output depending on the evaluation results, with which the drop pulse of a scale (13) used to weigh the filling material (12) above the preformatting flap (17) is synchronized with the opening pulse of the preformatting flap (17).

Description

[0011] The method according to the invention will be exemplarily described below based on the drawing.

[0012] Shown on:

[0013] FIG. 1 is a schematically illustrated bagging machine while implementing the method according to the invention in cross section.

[0014] FIG. 1 shows a schematically illustrated bagging machine 01, wherein FIG. 1 only shows the parts of the bagging machine 01 that are necessary for understanding the invention. A film web 03 is unwound from a supply roll 02, and then formed into a film sleeve 05 on a forming shoulder 04. The film sleeve 05 slides downwardly on the exterior side of a format tube 06, driven by a film outlet 07, wherein the film sleeve 05 is longitudinally sealed parallel to its transport direction by means of a longitudinal sealing device not shown on FIG. 1.

[0015] Located below the format tube 06 is a cross sealing device 08 with two cross jaws 09 for generating cross seams, with which the film sleeve 05 is cross welded into individual bags 10. A separating device 11 is integrated into the cross jaws 09, with which the individual bags 10 can be separated from each other after cross welding.

[0016] The filling material 12 for filling the bags 10 is measured with a measuring device, for example a scale 13, in such a way as to reach the respective fill quantity provided for a bag 10. An opening pulse in the scale 13 causes the measured filling material to drop into the funnel 14 lying thereunder. The filling material is merged to the diameter of the format tube 06 via the funnel 14. A first vibration sensor 15 is located at the upper end of the format tube 06 and below the funnel 14, and can be used to acquire the airborne and/or structure-borne signals as the filling material passes through the funnel 14. The corresponding measurement signals are relayed via a cable to a vibration evaluation device 16, so that the measurement signals are evaluated, and interference in the area of the funnel 14 can be detected. For example, suitably comparing the vibration signal patterns with prestored target patterns makes it possible to identify interference with the vibration evaluation device 16, and then to initiate a machine stop as a function thereof, for example.

[0017] After the filling material 12 is passed through the funnel 14, it continues to drop down through the format tube, and hits an initially still closed preformatting flap 17. The closed preformatting flap 17 initially holds back the filling material 12, until the bag lying thereunder is transported further, and sealed through cross sealing by means of the cross sealing device 08, so that the next bag can be filled. The airborne and structure-borne signals that arise as the filling material 12 hits the upper side of the preformatting flap 17 can be measured with a vibration sensor 18. The measurement signals of the vibration sensor 18 are likewise evaluated in the vibration evaluation device 16, and suitable function signals are output depending on the measuring result.

[0018] In particular the drop pulse of the scale 13 can here be synchronized with the movement control of the preformatting flap 17 by suitably evaluating the sound signals acquired by the vibration sensor 18.

[0019] As soon as the preformatting flap 17 is opened after the further transport of the bag lying thereunder, the filling material drops onto the still closed cross sealing jaws 09 of the cross sealing device 08. The airborne and/or structure-born sound signals that arise in this process can be acquired with a vibration sensor 19 and evaluated by means of the vibration evaluation device 16. In particular, this makes it possible to determine if no filling material has dropped down, wherein an undesired interference caused by blockage of the filling material 12 has come about in the format tube 06, for example.