阅读说明：本技术 涂敷喷嘴 (Coating nozzle ) 是由 E·雷纳 B·绍尔 T·罗斯劳尔 C·卡梅勒 于 2019-02-05 设计创作，主要内容包括：本发明涉及一种涂敷喷嘴(10),其用于涂敷粘性材料到工件(44)上,包括喷嘴体(12)和在喷嘴体(12)中从材料进入开口(14)延伸直至材料排出开口(16)的用于粘性材料的涂敷通道(18)。按照本发明设置为,在涂敷通道(18)中设置有至少一个填充体(28),所述填充体收窄涂敷通道(18)的横截面且从与用于材料进入开口(14)具有距离设置的第一端部(30)延伸直至在材料排出开口(16)上设置的第二端部(32)。(The invention relates to an application nozzle (10) for applying viscous material to a workpiece (44), comprising a nozzle body (12) and an application channel (18) for the viscous material, which extends in the nozzle body (12) from a material inlet opening (14) to a material outlet opening (16). According to the invention, at least one filling body (28) is arranged in the application channel (18), said body narrowing the cross section of the application channel (18) and extending from a first end (30) arranged at a distance from the material inlet opening (14) to a second end (32) arranged at the material outlet opening (16).)

1. Application nozzle for applying a viscous material to a workpiece (44), comprising a nozzle body (12) and an application channel (18) for the viscous material in the nozzle body (12) extending from a material inlet opening (14) up to a material outlet opening (16), characterized in that at least one filling body (28) is arranged in the application channel (18), which narrows the cross section of the application channel (18) and extends from a first end (30) arranged at a distance from the material inlet opening (14) up to a second end (32) arranged on the material outlet opening (16).

2. An application nozzle according to claim 1, characterized in that the at least one filling body (28) has a cross-section which increases from the first end (30) to the second end (32).

3. Application nozzle according to claim 2, characterized in that the cross section of the at least one filling body (28) increases continuously at least locally from the first end (30) to the second end (32).

4. Application nozzle according to one of the preceding claims, characterized in that the at least one filler body (28) directly adjoins the nozzle body (12) over its entire length.

5. Application nozzle according to claim 4, characterized in that the at least one filler body (28) is formed integrally with the nozzle body (12).

6. Application nozzle according to one of the preceding claims, characterized in that two filling bodies (28) which are preferably identical in terms of their dimensions and have a distance from one another are arranged in the application channel (18).

7. Application nozzle according to one of the preceding claims, characterized in that the cross-sections of the application channel (18) and the filling body (28) add up to a semicircular surface at the material discharge opening (16).

8. Application nozzle according to claim 6 or 7, characterized in that the cross-section of the application channel (18) is M-shaped over the material discharge opening (16).

9. Application nozzle according to one of claims 6 to 8, characterized in that the two filling bodies (28) are arranged mirror-symmetrically with respect to the center plane (34).

10. Application nozzle according to one of the preceding claims, characterized in that the application channel (18) is bent between the material inlet opening (14) and the material outlet opening (16) in such a way that a central longitudinal axis (22) of a starting section (20) of the application channel (18) proceeding from the material inlet opening (14) and a central longitudinal axis (26) of an ending section (24) extending to the material outlet opening (16) form an acute or right angle, in particular an angle of between 30 ° and 60 °.

11. Application nozzle according to one of the preceding claims, characterized in that at least one heating element for heating the viscous material is arranged in the application channel (18).

12. Application nozzle according to claim 11, characterized in that the at least one heating element is arranged in at least one filling body (28).

13. Application nozzle according to one of the preceding claims, characterized in that at least one feed line for application of an additive into the material outlet opening (16) or into the application channel (18) is provided in the application channel (18).

14. Application nozzle according to claim 13, characterized in that the at least one feed line extends through the at least one filling body (28).

15. Application nozzle for applying viscous material to a workpiece (44), comprising a nozzle body (12) and an application channel (18) for the viscous material in the nozzle body (12) extending from a material inlet opening (14) up to a material outlet opening (16), characterized in that at least one heating element for heating the viscous material is arranged in the application channel (18).

16. Application nozzle for applying viscous material to a workpiece (44), comprising a nozzle body (12) and an application channel (18) for the viscous material in the nozzle body (12) extending from a material inlet opening (14) to a material outlet opening (16), characterized in that at least one feed line for an application additive into the material outlet opening (16) or the application channel (18) is provided in the application channel (18).

17. A coating nozzle according to one of claims 11 to 16, characterized in that the at least one heating element and/or the at least one supply line are detachably connected to the nozzle body (12).

18. Method for applying viscous material to a workpiece (44) with an application nozzle (10) having a nozzle body (12) through which an application channel (18) extends up to a material discharge opening (16), in particular with an application nozzle (10) according to one of the preceding claims, in which the viscous material is discharged from the material discharge opening (16) in an application direction (36), characterized in that the application nozzle (10) is moved during the application of the material in a movement direction (38) which is opposite to the application direction (36) or has at least one component opposite to the application direction (36).

19. Method for applying a viscous material to a workpiece (44) with an application nozzle (10) according to one of the preceding claims, in particular according to claim 18, wherein the viscous material is discharged from the material discharge opening (16) in an application direction (36) and forms a material strip (40, 40 ', 140a, 140b, 140c, 140d) extending in the application direction (36), and the material strip (40, 40', 140a, 140b, 140c, 140d) has a number of cavities (42) open at the edges extending in the application direction (36) corresponding to the number of filling bodies (28).

20. Method according to claim 19, characterized in that a strip of material (40, 40', 140a, 140b, 140c, 140d) having one cavity (42) facing the respective work piece (44) or a plurality of cavities (42) facing the respective work piece (44) is applied.

21. Method according to claim 19, characterized in that a material strip (40, 40', 140a, 140b, 140c, 140d) having one cavity (42) facing away from the workpiece (44) or a plurality of cavities (42) facing away from the workpiece (44) is applied, in particular in the bend (46) of the respective workpiece (44).

22. Shaped strip of adhesive material, manufactured by a method according to any one of claims 18 to 21.

Technical Field

The invention relates to an application nozzle for applying viscous material to a workpiece according to the preamble of claim 1.

Background

Known application nozzles of this type have found wide application in applying viscous materials such as adhesives, sealants, sound insulators or thermally conductive glues to workpieces. In the automotive industry in particular, such materials are applied to workpieces, for example body components. For this purpose, the application nozzle is moved relative to the workpiece by means of a robot and the metering system introduces the viscous material under pressure into the application channel, through which the material flows and is discharged from the application nozzle at a material discharge opening and applied to the associated workpiece. Here, so-called round nozzles with a round material outlet opening are generally used, so that a strip of material which is approximately round in cross section leaves the application nozzle. The strip of material applied to the relevant workpiece then has a height corresponding approximately to its width. An excessively large height of the coated material strand can be disadvantageous, in particular when adhesive is applied to the work pieces in order to combine two work pieces. In particular, the less stable workpieces cannot be pressed against one another with sufficient force in order to flatten the adhesive strand.

Disclosure of Invention

The object of the present invention is therefore to further develop a coating nozzle of the type mentioned at the outset in such a way that a relatively flat material strip can be applied.

This object is achieved according to the invention by a coating nozzle having the features of claim 1. Advantageous further developments of the invention are the subject matter of the dependent claims.

The invention is based on the idea of producing a gas jacket in the material strip by means of at least one filling body which is arranged in the application channel and extends as far as the material discharge opening, so that the material strip applied to the workpiece is partially hollow. The cavity may be annularly surrounded by the strip of material or open to the surface of the strip of material. By this measure, the material strip can be compressed considerably more easily and can be flattened in a simpler manner and with less effort when the two workpieces are pressed against one another, in order to achieve a smaller height of the material strip.

Preferably, the at least one filling body has a cross section which increases from the first end to the second end. Preferably, the cross section of the at least one filling body increases continuously at least in places from the first end to the second end. These measures are advantageous in fluid technology, since the discontinuous cross-sectional change in the application channel adversely affects the flow behavior of the viscous material in the application channel.

It is possible for the at least one filler body to be arranged in the application channel at a distance from the nozzle body at least over a part of its length, in particular towards the second end. In such an arrangement, an annularly enclosed cavity or air pocket in the coated strip of material is obtained. Preferably, however, the at least one filler body directly adjoins the nozzle body over its entire length and is in particular formed in one piece with the nozzle body. In this way, the air jacket or cavity in the strip of material is open at the edge. The strip of material can then be applied to the workpiece, on the one hand, in such a way that the open edge of the gas sleeve faces the workpiece and the gas sleeve is thus delimited on one side by the adhesive material and on the other side by the workpiece, or, on the other hand, in such a way that the open edge faces away from the workpiece.

According to an advantageous further development of the invention, two filling bodies, which are preferably identical in terms of their dimensions and have a distance from one another, are arranged in the application channel. In this way, two cavities separated from each other are made in the strip of material. According to a preferred embodiment, the cross-sections of the application channel and the one or more filling bodies add up to a semicircular surface at the material outlet opening. This can lead to an M-shaped cross section of the application channel at the material outlet opening, in particular if two filling bodies are present in the application channel. When two filling bodies are present in the application channel, these are expediently arranged mirror-symmetrically with respect to the center plane, so that the M-shaped cross section of the application channel at the material outlet opening is also mirror-symmetrical.

Preferably, the application channel is bent between the material inlet opening and the material outlet opening such that a central longitudinal axis of a starting section of the application channel, which starts from the material inlet opening, and a central longitudinal axis of an ending section, which extends to the material outlet opening, form an acute or right angle, in particular an angle of between 30 ° and 60 °. Such nozzle geometries are used in particular when the application nozzle is moved in a retracted manner during the application of the material, i.e. in a movement direction opposite to the application direction in which the viscous material is discharged from the material outlet opening.

According to an advantageous further development, at least one heating element for heating the viscous material is arranged in the application channel. This further development according to the invention can also be realized independently of the presence of the at least one filling body in the application channel. This measure takes account of the fact that it is advantageous to heat the viscous material during application in order to reduce its viscosity and to facilitate application. This takes place in the known application nozzle in that the nozzle body of the application nozzle is surrounded by a heating element. For reasons of space, however, the heating element may not extend as far as the nozzle tip, on which the material outlet opening is arranged. If a heating element is provided in the application channel, the viscous material can be heated until it is discharged from the material discharge opening. In particular, the heating element can be arranged in the filling body in the presence of at least one filling body in the application channel.

It may also be advantageous to mix additives to the viscous material when it is applied to the workpiece. This can be a thermally conductive additive in particular. Viscous materials such as adhesives conduct heat poorly and require a long cooling period after application to the workpiece. The cooling duration can be shortened when thermally conductive additives are added. Of course, such additives are often abrasive, so that their addition leads to increased wear of the application nozzles and/or supply lines and/or metering systems for the viscous material. In order to reduce wear, it can therefore be provided that at least one feed line for the application additive into the material outlet opening or the application channel is provided in the application channel. The feed line can be made of a more resistant material so that it does not wear out as quickly. In particular, the metering system for viscous materials is not loaded with additive if the additive is not mixed in until just above or shortly before the material outlet opening. As with the heating element, the at least one supply line can advantageously extend through the at least one filling body. For example, the feed line may extend through the packing body, while the heating element is arranged in the second packing body. However, it is also possible to receive an inlet line for the additive into the application channel when no filler body is present in the application channel.

According to an advantageous further development, it is provided that at least one heating element and/or at least one supply line is detachably connected to the nozzle body. The heating element or the supply line can then be accommodated in the application nozzle as a wear part in a replaceable manner.

Drawings

The invention will be further explained with the aid of embodiments which are schematically shown in the drawing. Wherein:

fig. 1a, 1b show a front view and a side view of an application nozzle;

FIG. 1c shows a portion A of FIG. 1 a;

FIGS. 2a, 2b show cross-sections of a strip of material applied to a workpiece when one or two filling bodies are used and

fig. 3a to 3d show four different forms of cross-section of a strip of material in a bend.

Detailed Description

The application nozzle 10 shown in the figures has a nozzle body 12 in which an application channel 18 extends from a material inlet opening 14 as far as a material outlet opening 16. The application nozzle 10 is used for applying a viscous material to a workpiece, wherein the application nozzle is moved relative to the workpiece and the viscous material is introduced under pressure into an application channel 18 through a material inlet opening 14 and leaves the application channel again at a material outlet opening 16. The application channel 18 has a starting section 20 extending from the material inlet opening 14, which has a constant cross section and extends parallel to a first central longitudinal axis 22. The application channel furthermore has an end section 24 which opens into the material outlet opening 16 and which in turn has a linear extent parallel to a second central longitudinal axis 26 which extends at an acute angle to the first central longitudinal axis 22. The cross-section of the coating channel 18 decreases from the beginning section 20 to the end section 24. The coating channel 18 is curved between a beginning section 20 and an ending section 24.

Two filling bodies 28 are arranged in the application channel 18, which are formed integrally with the nozzle body 12 and whose cross section narrows in the end section 24. Each filling body 28 extends from a first end 30, which is likewise arranged at a distance from the material inlet opening 14, as from the material outlet opening 16, to a second end 32, which is arranged on the material outlet opening 16. The two filling bodies 28 have the same dimensions and are arranged side by side with a distance and extend parallel to one another. They are furthermore arranged symmetrically with respect to a center plane 34, which extends perpendicularly to the drawing planes of fig. 1a, 1c and parallel to the drawing plane of fig. 1b and is a plane of symmetry of the application nozzle 10. The cross-section of the filling body 28 increases continuously from the first end 30 to the second end 32. The cross-sections of the application channel 18 and the filling body 28 add up to a semicircular surface at the material outlet opening 16.

The application nozzle 10 is particularly suitable for applying a strip of material to a workpiece, wherein the application nozzle 10 is moved in a retracted manner. This means that the material is discharged from the material outlet opening 16 in a coating direction 36, while the coating nozzle 10 is simultaneously moved in a direction of movement 38 which is opposite to the coating direction 36 or has at least one direction component which extends opposite to the coating direction 36. A material strip 40, which is substantially M-shaped in cross section, emerges from the material outlet opening 16, wherein the tip of the M is rounded off, having two cavities 42 which substantially correspond to the filling body 28 in cross section. The strip of material may be applied to the workpiece 44 as shown in fig. 2a such that the cavity 42 is contained between the viscous material and the workpiece 44.

In principle, the application nozzle 10 can be realized instead of two filling bodies 28 running parallel to one another, also with only one filling body running in the application channel 18 up to the material outlet opening 16. Fig. 2b shows schematically a cross section of a corresponding material strip 40' which encloses only one cavity 42 with the workpiece 44. Such a material strip 40' can be applied, in particular, if there is a risk that the material strip slides off in one direction on the workpiece 44. The strip of material has a thicker main region 40 'a and a support region 40' b which resists slipping off.

Fig. 3a to 3d schematically show application examples in which the material strips 140a to 140d are applied to the respective work pieces 44 in opposite directions, i.e. so as to face away from the cavities 42 of the work pieces 44. Fig. 3a to 3c in this case show three different embodiments, in which in each case one filling body 28 is used for forming a cavity 42, while fig. 3d shows an embodiment in which two filling bodies 28 are used for forming two cavities 42, corresponding to the application nozzle 10 according to fig. 1a to 1 c. By suitable selection of the cross section of the filling body 28, the geometry of the material strips 140a to 104d can be influenced and adapted to the respective given conditions and requirements. In fig. 3a to 3d, the material strips 140a to 140d each fill one of the folds 46.

The filling body 28 can assume further functions according to further configurations which are not shown in the figures. In this way, it is possible to insert an electrically heatable heating cartridge into at least one of the filling bodies for heating the viscous material in the end section 24, where the heating cartridge is fixedly or removably received. It is also possible for a feed line for, in particular, abrasive additives to extend through at least one of the filling bodies 28, said feed line leading into the end section 24 or into the material outlet opening 16. The supply lines can also be integrated fixedly into the respective packing body 28 or can be arranged removably in the packing body, so that they can be replaced in the event of wear.

The following is summarized as: the invention relates to an application nozzle 10 for applying a viscous material to a workpiece 44, comprising a nozzle body 12 and an application channel 18 for the viscous material in the nozzle body 12 extending from a material inlet opening 14 to a material outlet opening 16. According to the invention, at least one filling body 28 is provided in the application channel 18, which narrows the cross section of the application channel 18 and extends from a first end 30 arranged at a distance from the material inlet opening 14 to a second end 32 arranged at the material outlet opening 16.