Window adhesion machine and material cutting and feed device

Abstract

The invention relates to a device (7) for cutting continuous material (19) into material sections (12) and feeding the material sections (12) to blanks (3) for joining them, comprising a suction belt (11) extending in a V-shape between deflections (14, 15, 16) for conveying the continuous material (19) and the material sections (12), a cutting tool (10) arranged transversely to the suction belt (11) with a cutting edge (17), and a feed-side retainer (20) for the continuous material (19), wherein a distance (I) between the cutting edge (17) and a discharge-side deflection (16) is less than a distance between the cutting edge (17) and a feed-side deflection (14). The invention further relates to a window gluing machine (1) with a material cutting and feeding device.

Description

Field of the invention

[0001] The invention relates to a material cutting and feeding device and a window gluing machine according to the preamble of claims 1 and 13 respectively. Technological background

[0002] US 10 232 579 B2 describes a window gluing machine for gluing film sections cut from a film roll onto windowed cardboard blanks for the production of packaging boxes. A film web resting on a V-shaped suction belt section of a circulating suction belt is lifted from the suction belt towards a cutting blade at a rate corresponding to the window length by means of a timed film web retainer. The cutting blade is positioned vertically and centrally between two deflection rollers of the suction belt V and cuts through the film web, forming film sections, which then fall back onto the suction belt with a gap between the separating edges. The film sections produced in this way are stripped off the suction belt onto the cardboard blanks glued around the window edges and joined to these to form film window boxes.

[0003] The known device is limited in terms of separation quality and size, making it impossible to reliably produce short window sections. For example, the deflection rollers cannot be arranged as close to one another as desired, and the resulting short film sections are neither reliably sucked onto the suction belt nor released by it. Furthermore, the gluing complexity increases with short film sections, resulting in quality problems with the nozzle assembly, particularly in the form of glue marks on the windows. Furthermore, the nozzles are maintenance-intensive. Overall, the known window gluing machine results in inaccurate and incomplete separations, detachments, and poor bonding with short film sections. Uninterrupted operation is not possible, and operating costs are high. Summary of the invention

[0004] The invention is therefore based on the object of creating a material cutting and feeding device and window gluing machines according to the preamble of claim 1 and 13 respectively, which enable shorter window lengths with improved production quality and reduced maintenance effort.

[0005] This object is achieved according to the features of claims 1 and 13, respectively.

[0006] This creates a material cutting and feeding device with a cutting tool whose distance from a material-discharging deflection of a suction belt is smaller than from a material-feeding deflection. The distance between the cutting tool and the material-discharging deflection can be less than 70 mm, less than 60 mm, less than 50 mm, or 55 mm + / - 1 mm, + / - 2 mm, + / - 3 mm, or + / - 5 mm. It can be 2% to 48%, preferably 5% to 40%, 10% to 30%, or 10% to 20% of the distance between the material-discharging and material-feeding deflection. The distance is expediently measured along a tangent extending from the cutting edge toward the deflection.

[0007] This allows for reliable cutting of shorter material sections. A particularly reliable and improved cutting effect is achieved by tilting the cutting tool, and especially the cutting edge, against the feed direction, and preferably also perpendicular to the feed direction. Thanks to the tilting of the cutting edge, a tearing action is exerted on the film web with cutting-like precision. Reliability is increased by stripping and / or pressing devices with contoured and angle-adjustable fingers that can engage in recesses in deflections. A gluing device, which features both cliché and nozzle elements, can reliably and cleanly apply glue to the short, cut material sections.This results in improved production quality with reduced maintenance effort, so that a window gluing machine with the gluing and material cutting and feeding device according to the invention enables shorter window lengths in mass production.

[0008] Further features and embodiments of the invention will become apparent from the following description of exemplary embodiments, the figures and the claims. Short description of the characters

[0009] Fig. 1 shows a window gluing machine. Fig. 2 illustrates the cutting tool angle. Fig. 3 illustrates the cutting edge angle relative to the material web. Fig. 4 illustrates a stripping device. Fig. 5 illustrates a pressing device. Fig. 6 illustrates an embodiment of a stripping or pressing device. Fig. 7 illustrates a gluing device. Fig. 8 to 13 illustrate further designs. Detailed description of implementation examples

[0010] The Fig. 1 The window gluing machine 1 shown comprises a feeding device 2 for windowed blanks 3 which, after being applied with glue 4 by a gluing device 5 in the transport direction 6, are covered by a material cutting and feeding device 7 with window film sections 12 cut to length from a film roll 8 via a strain relief 9 onto a suction belt 11 interacting with a cutting tool 10 for the production of film window boxes 13 or the like.

[0011] The basic structure of the gluing device 5, the strain relief 9 and the material cutting and feeding device 7 is known from US 10 232 579 B2.

[0012] The suction belt 11 is guided in a V-shape between deflections 14, 15, and 16. The cutting tool 10 here is a knife, possibly serrated and / or provided with points, with a cutting edge 17 facing the suction belt 11, which is arranged closer to the discharge-side deflection 16 than to the feed-side deflection 14. A distance 18 is preferably less than 20 mm. A film web 19 unwound from the film roll 8, for example 30-40 micrometers thin or approximately 70 micrometers thick, which can generally be between 10 micrometers and 2mm, preferably between 10 micrometers and 200 micrometers and expediently between 20 micrometers and 100 micrometers thick, is held in place in a timed manner by a feed-side retainer 20, here in the form of two stoppable rollers, whereby the film web is released into position 19' from the suction belt 11 and pressed against the cutting edge 17 and severed by it.The window film sections 12 thus produced are returned by means of a feed roller 21 to the suction belt 11, which has already moved further, forming a spacing of successive window film sections 12.

[0013] Preferably, the cutting tool 10 and / or the cutting edge 17 is inclined relative to the vertical by an angle α > 0° against the feed direction, see Fig. 2 The angle α can be between 5° and 10°.

[0014] The cutting tool 10 and / or the cutting edge 17 can also be arranged at an angle β > 0° transverse to the feed direction, see Fig. 3 The angle β is advantageously between 10° and 15°. As a result, when tensioned to position 19', the film web 19 encounters a cutting edge inclined relative to the film web surface, and thus, during the cutting process, it encounters the cutting edge earlier on one side than on the opposite side.

[0015] A stripping device 23 for stripping the material sections 12 from the suction belt 11 can be provided on a lower deflection 22, see Fig. 4 . Above the discharge-side deflection 16 and in particular on the feed roller 21, a suitably identically constructed pressing device 24 for pressing the material sections onto the suction belt can be provided, see Fig. 5 .

[0016] The devices 23, 24 expediently have fingers 25, for example as in Fig. 6Represented in the form of comb-like, spaced and contoured, in particular arcuately shaped sheets, which engage in recesses or grooves of the deflection 21 or feed roller 22 and, if applicable, in the suction belt 11 and / or can be angle-adjustable and / or pivotally mounted on a shaft 26 for maintenance purposes. The sheets can be 0.2 mm to 1 mm or up to 2 mm thick or, through L- or U-shaped bending, can have a contact surface of up to 5 mm or 10 mm wide with the film web. A contour of the stripping device 23 can taper against the feed direction of the film sections 12 and / or a contour of the pressing device 24 can taper against the feed direction of the film 19, see Fig. 4 or 5.

[0017] According to the invention, the gluing device 5 comprises both a nozzle device 27 for gluing in the feed direction 28 and a cliché device 29 for gluing transversely to the feed direction 28, see Fig. 7The cliché device 29 preferably extends along the length of the window cutouts 30. The nozzle device 27 can preferably have one or, as shown by way of example, several nozzles 31, spaced here transversely to and / or in the feed direction 28. The nozzle device 27 places gluing points and / or gluing lines on the blanks in a program-controlled manner, in particular adjacent to the window cutout 30. Both the nozzle and the cliché device can extend across the entire width of the web, since the program control and / or the cliché exchange enable individual gluing adaptation to the blank.

[0018] Fig. 8 illustrates a further embodiment of the material cutting and feeding device 7 with Fig. 1 opposite transport direction 6. Instead of two underside deflections, only one wider deflection 22 is used.

[0019] The cutting device with the cutting tool 10 and the feed roller 21 cannot be arranged very close to each other in technical implementation, see Fig. 9 , which is why the cutting tool 10 can be arranged off-center to the deflection 15 as shown and thus closer to the deflection 16 than to the deflection 14. As shown in Fig. 10 As shown, the cutting tool 10 can have an angled free cutting end in all embodiments or can be inclined overall in order to bring the cutting edge 17 even closer to the deflection 16. A distance between the cutting edge 17 and the axis of the deflection roller 15 is expediently more than 0.5 cm, 1 cm or 2 cm, see Fig. 9 to 12 .

[0020] As in Fig. 11 , 12 As illustrated, the distance 18 can be measured along a deflection tangent extending from the cutting edge 17 in the direction of the discharge-side deflection 16 up to the pressing position 32 there for the film web 19.

[0021] Fig. 13 illustrates the lower stripping device 23 with fingers that engage in grooves of the suction belt 11 and / or the deflection 22.

[0022] The material cutting and feeding device, the stripping device, the pressing device and the gluing device are each independent and divisible inventive concepts that are preferably used together in a window gluing machine. Reference symbol

[0023] 1 Window gluing machine 2 Feeding device 3 Cutting device 4 Glue 5 Gluing device 6 Transport direction 7 Material cutting and feeding device 8 Film roll 9 Strain relief 10 Cutting tool 11 Suction belt 12 Window film section 13 Film window board 14 Deflection 15 Deflection 16 Deflection 17 Cutting edge 18 Distance 19 Film web 20 Retainer 21 Feed roller 22 Deflection 23 Stripping device 24 Pressing device 25 Finger 26 Shaft 27 Nozzle device 28 Feed direction 29 Cliché device 30 Window cutout 31 Nozzle 32 Pressing position αAngle βAngle

Claims

1. Device (7) for cutting continuous material (19) into material sections (12) and feeding the material sections (12) to blanks (3) for connection thereto, comprising a suction belt (11) arranged in V-shape between deflections (14, 15, 16) for carrying the continuous material (19) and the material sections (12), a cutting tool (10) arranged transversely to the suction belt (11) with a cutting edge (17), and a retainer (20) on the feed side for the continuous material (19), characterized in that a distance (I) between the cutting edge (17) and a deflection (16) on the discharge side is smaller than a distance between the cutting edge (17) and a deflection (14) on the feed side.

2. Device according to claim 1, characterized in that the cutting tool (10) and / or the cutting edge (17) is inclined at an angle α > 0° relative to the vertical, in particular against the direction of rotation of the suction belt.

3. Device according to claim 2, characterized in that the angle α is between 2° and 15°, between 4° and 12° or between 5° and 10°.

4. Device according to claim 1 or 2, characterized in that the cutting tool (10) and / or the cutting edge (17) is arranged at an angle β > 0° transverse to the feed direction.

5. Device according to claim 4, characterized in that the angle β is between 2° and 20°, between 8° and 18°, or between 10° and 15°.

6. Device according to one of claims 1 to 5, characterized in that the distance (I) between the cutting edge (17) and the deflection device (16) on the discharge side is less than 70 mm, less than 60 mm, less than 50 mm or 55 mm ± 1 mm, ± 2 mm, ± 3 mm or ± 5 mm.

7. Device according to one of claims 1 to 6, characterized in that the distance (l) is measured along a deflection tangent extending from the cutting edge (17) in the direction of the deflection on the discharge side (16).

8. Device according to one of claims 1 to 7, comprising the suction belt (11) circulating continuously between the deflections (14, 15, 16, 22) for feeding the continuous material (19) to a cutting device and the material sections (12) from the cutting device to the cut pieces (3), characterized in that a stripping device (23) having a finger (25) is provided at a lower deflection (22) for stripping the material sections (12) from the suction belt (11), and / or a pressing device (24) with a finger (25) is provided on an upper deflection (16) and / or a feed roller (21) for pressing the material sections (24) onto the suction belt (11).

9. Device according to claim 8, characterized in that the stripping and pressing devices (23, 24) are of the same design.

10. Device according to claim 8 or 9, characterized in that the fingers (25) are formed by metal sheets, in particular spaced apart in a comb-like manner.

11. Device according to claim 10, characterized in that the metal sheets are contoured, in particular in the shape of an arc.

12. Device according to any of claims 8 to 11, characterized in that the fingers (25) are mounted on a shaft (26) in an angle-adjustable manner.

13. Window gluing machine (1) with a feed device (2) for windowed blanks (3), in particular packaging blanks, and a gluing device (5) for gluing the blanks (3) along a window edge, characterized by a material cutting-to-length and feed device (7) for cutting continuous material to length into material sections and applying the material sections to glued blanks for the purpose of joining the material sections to blanks, according to one of claims 1 to 12, wherein the gluing device (5) has a nozzle device (27) for gluing in the feed direction (28) and a printing plate device (29) for gluing transversely to the feed direction (29).

14. Window gluing machine according to claim 13, characterized in that the nozzle device (27) is designed for program-controlled setting of gluing points and / or gluing lines on the blanks (4).

15. Window gluing machine according to claim 13 or 14, characterized in that the nozzle device (27) has several nozzles (31) spaced transversely to and / or in the feed direction.

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