Contact welding heating component and automatic welding machine

Abstract

A contact welding heating component and to an automatic welding machine for plasticizing the edges of thermally fusible/meltable material sheets disposed so as to overlap at least partially. A roughening device for the material sheets, which is disposed upstream of the trailing-material edge of the heating component in the direction of movement of the contact welding heating component, protrudes beyond the upper side of the heating component and/or the lower side of the heating component, wherein the roughening device extends transversely to the direction of movement of the contact welding heating component, adjoining the trailing-material edge of the heating component, and includes a number of sharp-edged raised roughening elements extending in the direction of movement of the contact welding heating component, preferably having a variable height in the direction of movement of the contact welding heating component. The automatic welding machine includes a contact welding heat component thus designed.

Claims

1. A contact welding heating component for plasticizing the edges of thermally fusible/meltable material sheets disposed so as to overlap at least partially, which can be inserted between an overlapped lower material sheet and an overlapping upper material sheet and can be moved along the same, comprising an upper side of the heating component for making contact with the upper material sheet and a lower side of the heating component for making contact with the lower material sheet, including a front leading-material side of the component in the direction of movement of the contact welding heating component during the welding operation, and a rear trailing-material edge of the heating component, for the material sheets that are joined to one another by way of the upper side of the heating component and the lower side of the heating component, forming a wedge-shaped contour, and comprising at least one roughening device for the material sheets that are disposed upstream of the trailing-material edge of the heating component in the direction of movement of the contact welding heating component, which protrudes beyond the upper side of the heating component and/or the lower side of the heating component and extends transversely to the direction of movement of the contact welding heating component, adjoining the trailing-material edge of the heating component, and comprises a number of sharp-edged raised roughening elements extending in the direction of movement of the contact welding heating component, wherein the roughening device and the roughening elements have a variable height in the direction of movement of the contact welding heating component.

2. The contact welding heating component according to claim 1, wherein the roughening device and the roughening elements have a maximum height in the direction of the trailing-material edge of the heating component.

3. The contact welding heating component according to claim 1, wherein the roughening devices and the roughening elements have an arcuate progression in the direction of movement of the contact welding heating component.

4. The contact welding heating component according to claim 1, wherein the roughening device and the roughening elements are interrupted in the direction of movement of the contact welding heating component.

5. The contact welding heating component according to claim 1, wherein the roughening device and the roughening elements are interrupted perpendicularly to the direction of movement of the contact welding heating component.

6. The contact welding heating component according to claim 1, wherein the roughening device and the roughening elements have a variable height perpendicularly to the direction of movement of the contact welding heating component.

7. The contact welding heating component according to claim 6, wherein the height of the roughening device and of the roughening elements decreases from the outside to the inside perpendicularly to the direction of movement of the contact welding heating component.

8. The contact welding heating component according to claim 1, wherein the contact welding heating component is made of metal and produced entirely or partially by way of a 3D metal printing method or entirely or partially by way of a laser sintering and/or laser melting method.

9. The contact welding heating component according to claim 1, wherein the contact welding heating component comprises a supporting brace on the inside between the upper side of the heating component and the lower side of the heating component.

10. The contact welding heating component according to claim 1, wherein the contact welding heating component is a hot-air-slot welding nozzle or an electrical hot welding wedge.

11. The contact welding heating component according to claim 10, wherein the contact welding heating component is a hot-air-slot welding nozzle and the hot-air-slot welding nozzle includes a hot air inlet opening, at least one slot-shaped welding air outlet opening, and at least one preheating air outlet opening for a hot air stream disposed upstream of the welding air outlet opening in a direction of movement of the hot-air-slot welding nozzle during the welding operation, and wherein the roughening device extends transversely to the direction of movement of the hot-air-slot welding nozzle, adjoining the welding air outlet opening.

12. The contact welding heating component according to claim 10, wherein the roughening elements extend from the preheating air outlet opening to the welding air outlet opening.

13. The contact welding heating component according to claim 10, wherein the contact welding heating component is an electrical hot welding wedge the electrical hot welding wedge is electrically heated directly or indirectly, and wherein the roughening device extends transversely to the direction of movement of the electrical hot welding wedge, adjoining the trailing-material edge of the heating component.

14. An automatic welding machine for joining the edges of thermally fusible/meltable material sheets disposed so as to overlap at least partially, comprising a contact welding heating component, which can be inserted between an overlapped lower material sheet and an overlapping upper material sheet for plasticization of the material sheets and can be moved along the same, comprising a contact welding heating component according to claim 1.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) In the drawings:

(2) FIG. 1 shows an automatic welding machine according to the invention, which is designed as an automatic hot air welding machine and comprises a contact welding heating component according to the invention in the form of a hot-air-slot welding nozzle, in a perspective view;

(3) FIG. 2 shows an enlarged section from FIG. 1 in the region of the hot-air-slot welding nozzle;

(4) FIG. 3 shows the hot-air-slot welding nozzle from FIG. 2 in a perspective illustration in a view from above;

(5) FIG. 4 shows the hot-air-slot welding nozzle from FIG. 2 in a perspective illustration in a view from beneath;

(6) FIG. 5 shows the hot-air-slot welding nozzle from FIG. 2 in a perspective illustration in a side view; and

(7) FIG. 6 shows a contact welding heating component according to the invention in the form of an electrical hot welding wedge, in a perspective illustration from above.

DETAILED DESCRIPTION OF THE INVENTION

(8) FIG. 1 illustrates an automatic welding machine 1 for joining the edges of thermally fusible/meltable material sheets (not shown in the figure) disposed so as to overlap at least partially, comprising a contact welding heating component 2 according to the invention, which can be inserted between the overlapped lower material sheet and the overlapping upper material sheet for plasticization of the material sheets, and which can be moved along the same. The illustrated exemplary embodiment is a self-propelled automatic hot air welding machine 1, comprising a regulatable hot air blower 3, having the contact welding heating component 2 disposed at the end of an air outlet tube 4 thereof, wherein the contact welding heating component 2 is designed as a hot-air-slot welding nozzle 2. The automatic welding machine 1 is supported by drive rollers 5 and a pressing cylinder 6.

(9) FIG. 2 shows an enlarged section from FIG. 1 in the region of the hot-air-slot welding nozzle 2. The hot-air-slot welding nozzle 2 is provided to plasticize the edges of fusible/meltable material sheets (not shown) disposed so as to overlap at least partially and, at the top and bottom, comprises protruding roughening devices 7 and 7 for the material sheets, which are disposed upstream of a trailing-material edge 8 of the heating component in the direction of movement of the contact welding heating component 2. The roughening devices 7, 7 are disposed so as to directly adjoin the trailing-material edge 8 of the heating component and extend transversely to the direction of movement of the contact welding heating component 2. Each comprises a number of sharp-edged raised roughening elements 9 extending in the direction of movement of the contact welding heating component 2, which act on the material sheets during plasticization thereof.

(10) FIG. 3 shows the hot-air-slot welding nozzle 2 from FIGS. 1, 2 in a perspective illustration, in a view from above, and FIG. 4 shows the same in a perspective illustration, in a view from beneath, in an enlarged illustration, separated from the hot air blower 3. This is detachably attachable to the air outlet tube 4 of the hot air blower 3 and includes a hot air inlet opening 10, a slot-shaped welding air outlet opening 11 and multiple preheating air outlet openings 12 for hot air streams, disposed upstream of the welding air outlet opening 11 in the direction of movement of the hot-air-slot welding nozzle 2 during the welding operation, wherein the respective roughening devices 7, 7 extend transversely to the direction of movement of the hot-air-slot welding nozzle 2, adjoining the welding air outlet opening 11. The hot-air-slot welding nozzle 2 has an upper side 13 of the heating component for making contact with the upper material sheet and a lower side 13 of the heating component for making contact with the lower material sheet, including a front leading-material side 14 of the heating component in the direction of movement of the contact welding heating component 2 during the welding operation, opposite to which, and at a distance therefrom, a rear trailing-material edge 8 of the heating component for the material sheets is disposed. The leading-material side 14 of the heating component and the trailing-material edge 8 of the heating component are joined to one another by the upper side 13 of the heating component and the lower side 13 of the heating component, forming a wedge-shaped contour.

(11) FIG. 5, which shows the hot-air-slot welding nozzle 2 in a perspective illustration in a side view, again illustrates that the roughening devices 7, 7 for the material sheets of the contact welding heating component 2, which are disposed upstream of the trailing-material edge 8 of the heating component in the direction of movement of the hot-air-slot welding nozzle 2, protrude considerably beyond the upper side 13 of the heating component and the lower side 13 of the heating component.

(12) According to FIGS. 3 to 5, the roughening devices 7, 7 are disposed so as to extend transversely to the direction of movement of the contact welding heating component 2, adjoining the trailing-material edge 8 of the heating component, and each comprise a number of sharp-edged raised roughening elements 9 extending in the direction of movement of the contact welding heating component 2. The roughening devices 7, 7 and the roughening elements 9 have a variable height in the direction of movement of the contact welding heating component 2, and have a maximum height in the direction of the trailing-material edge 8 of the heating component. The height of the roughening elements 9 is thus the greatest near the air outlet opening 11 of the hot-air-slot welding nozzle 2. In the illustrated embodiment, in particular, the roughening devices 7, 7 and the roughening elements 9 have an arcuate progression in the direction of movement of the contact welding heating component 2.

(13) FIG. 6 illustrates a contact welding heating component 2 according to the invention, in the form of an electrical hot welding wedge 2, in a perspective illustration from above. The electrical hot welding wedge 2 is provided to plasticize the edges of fusible/meltable material sheets (not shown) disposed so as to overlap at least partially and, at the top, comprises a protruding roughening device 7 for the material sheets, which is disposed upstream of the trailing-material edge 8 of the heating component of the contact welding heating component 2 in the direction of movement of the contact welding heating component 2. The roughening device 7 is disposed so as to directly adjoin the trailing-material edge 8 of the heating component of the electrical hot welding wedge 2 and extend transversely to the direction of movement of the contact welding heating component 2. This comprises a number of sharp-edged raised roughening elements 9 extending in the direction of movement of the contact welding heating component 2, which act on the material sheets during plasticization thereof.

(14) The temperature of the electrical hot welding wedge 2 can be controlled directly by way of an integral heating resistor, or indirectly by way of a cartridge heater accommodated therein. This comprises an attachment device 15 for attachment to a hand-held welding device or an automatic welding machine. The electrical hot welding wedge 2 has an upper side 13 of the heating component for making contact with the upper material sheet and a lower side 13 of the heating component for making contact with the lower material sheet, and a front leading-material side 14 of the heating component in the direction of movement of the contact welding heating component 2 during the welding operation, opposite to which, and at a distance therefrom, a rear trailing-material edge 8 of the heating component, relative to the material sheets, is disposed. The leading-material side 14 of the heating component and the trailing-material edge 8 of the heating component are joined to one another by the upper side 13 of the heating component and the lower side 13 of the heating component, forming a wedge-shaped contour. Otherwise, the roughening device 7 and the roughening elements 9 are designed as described above with respect to the hot-air-slot welding nozzle 2.