BINARY NOZZLE, SPRAY HEAD AND METHOD

Abstract

A binary nozzle for atomizing a mixture of agent to be sprayed and spray air is connected to at least one supply duct via which the mixture or the agent to be sprayed can be supplied to the binary nozzle, wherein a valve is arranged between this supply duct and a nozzle outlet of the binary nozzle. A corresponding spray head and also a method for atomizing a mixture of agent to be sprayed and spray air uses a binary nozzle. The binary nozzle includes a nozzle body formed in a single piece and including the nozzle outlet, wherein a movable assembly of the valve is fastened to the nozzle body by a fastening element and/or held tight against the nozzle body by a spring device.

Claims

1: A two-substance nozzle (30) that atomizes a mixture of sprayed medium and spray air, which nozzle is connected with at least one feed channel (40), by way of which the mixture or the sprayed medium can be supplied to the two-substance nozzle (30), wherein a valve (60) is disposed between this feed channel (40) and a nozzle exit (35) of the two-substance nozzle (30), wherein the two-substance nozzle (30) has a nozzle body (32) that is configured in one piece and comprises the nozzle exit (35), and a movable module of the valve (60) is attached to the nozzle body (32) by means of an attachment body (61), wherein the movable module of the valve (60) is pressed against the nozzle body (32) by means of the attachment body (61) and/or braced against the nozzle body (32) by means of a spring device (69).

2: A spray head (20) for cooling lubrication of at least one die (20) of a forming machine (25) having a lower die (21) and an upper die (22), in particular a die-forging press, which spray head is introduced into a work space (23) between lower and upper die (21, 22) between two work strokes, and carries at least one two-substance nozzle (30) according to claim 1.

3: A method for atomization of a mixture of sprayed medium and spray air by means of a two-substance nozzle (30), in which method the mixture or the sprayed medium is passed to the two-substance nozzle (30) by way of a feed channel (40) and a valve (60), and sprayed out by way of a nozzle exit (35) of the two-substance nozzle (30), wherein a movable module of the valve (60) is pressed against the nozzle body (32) by means of an attachment body (61) and/or by means of a spring device (69).

4: The two-substance nozzle (30) according to claim 1, wherein the attachment body (61) absorbs counter-forces of the spring device (69) and, in particular, the attachment body (61) and the spring device (69) are configured in one piece.

5: The two-substance nozzle (30) according to claim 1, wherein the valve (60), which is disposed between the feed channel (40) that supplies the mixture or the sprayed medium to the two-substance nozzle (30) and the nozzle exit (35) of the two-substance nozzle (30), is opened and closed by means of a pressure in this feed channel (40).

6: The two-substance nozzle (30) according to claim 1, wherein the two-substance nozzle (30) and the valve (60), except for the movable modules of the valve (60) and of the attachment body (61), as well as any adhesives or sealing agents, such as a sealing ring (62), for example, are configured in one piece.

7: The two-substance nozzle (30) according to claim 1, wherein the attachment body (61) is connected with the nozzle body in tightly sealed manner and/or wherein the movable module is a valve lid (65) and/or a press-down spring.

8: The two-substance nozzle (30) according to claim 1, wherein the distance between the nozzle exit (35) and the valve (60) amounts to not more than 10 times the maximal diameter (36) of the nozzle exit (35) and/or wherein the two-substance nozzle (30) has a straight-line path for the mixture or the sprayed medium between the valve (60) and the nozzle exit (35).

9: The two-substance nozzle (30) according to claim 1, wherein the diameter of the nozzle exit (35) amounts to more than 0.5 mm and/or less than 20 mm.

Description

[0028] Further advantages, goals, and properties of the present invention will be explained using the following description of exemplary embodiments, which are particularly also shown in the attached drawing. The drawing shows:

[0029] FIG. 1 a spray head in a perspective view, with multiple two-substance nozzles;

[0030] FIG. 2 a schematic section through one of the two-substance nozzles of the spray head according to FIG. 1; and

[0031] FIG. 3 a schematic side view of a forming machine configured as a die-forging press, with a spray head situated on a spray arm.

[0032] The spray head 10 shown in FIG. 1 has a top side 12 and an underside 14, wherein it has a two-part housing 70, on the one hand, which housing comprises two-substance nozzles 30 directed upward in a first part and corresponding feed channels 40, and two-substance nozzles 30 directed downward in a second part, and corresponding feed channels 40, and on the other hand has a spray head foot 50, which carries a plurality of supply connectors 55, wherein these are combined in the spray head foot 50, proceeding from the housing 70, in accordance with the required control possibility.

[0033] In the case of the present concrete exemplary embodiment, the feed channels 40 serve as sprayed medium channels 45, spray air channels 46 or control channels 47 (see FIG. 2), wherein the control channels 47 and the spray air channels 46 are combined, for the spray head foot 50, in the supply connectors 55, for the upper part of the housing 70 and the lower part of the housing 70, in each instance, and the sprayed medium channels 45 are each passed out individually as supply connectors 55, in each instance, so that these can have a sprayed medium pressure applied to them individually and under the control of separate valves.

[0034] The two parts of the housing 17 each have an essentially semi-circular atomization nozzle 80, which serves to secure the spray head 10 if it were to be exposed to overly high temperatures.

[0035] The individual two-substance nozzles 30 are each configured as Laval nozzles 31, and comprise a one-piece nozzle body 32, which forms a spray air exit 33 and a sprayed medium exit 34 of the Laval nozzle 31, in each instance, and makes a transition, in one piece, into the feed channels 40, which each comprise a sprayed medium channel 45, a spray air channel 46, and a control channel 47. In this regard, the spray air channels 46 and the control channels 47 are each combined in the spray head 10.

[0036] A valve 60 is formed on the nozzle body 32, in each instance, which valve has a membrane-type valve lid 65, which is pressed against the nozzle body by means of an attachment body 61 and a spring device 60, or attached to it.

[0037] A sealing ring 62 is provided between the attachment body 61 and the nozzle body 32, so that the attachment body 61 closes off the control channel 47, forming a seal, on the one hand, and consequently makes available a spring device 69 that acts like a gas spring, and, on the other hand, presses the valve lid 65 tightly against the nozzle body 32 on the outside of the valve lid 65.

[0038] If the pressure in the sprayed medium channel 45 now exceeds the pressure in the control channel 47, then the valve lid 65 will open counter to the gas pressure of the spring device 69. If the pressure is reduced accordingly, then the valve 60 will close due to the higher pressure in the control channel 47 or in the spring device 69.

[0039] It is understood that instead of the configuration of the spring device 69 as a gas pressure spring, a conventional helical spring or a plate spring, for example, can also be used at this location. In this regard, the corresponding mechanical spring can then be pressed against the valve lid 65 by means of the attachment body 61, for example, so as to make the spring force available in this manner. In this regard, it is understood that the attachment body 61 and the mechanical spring device can then also be configured in one piece with one another.

[0040] In a deviating embodiment, the control channel 47 can also be separated from the spray air channel 46. Then the sprayed medium channels 45 can preferably be combined to form one common or two supply connectors 55, so as to be able to pass the control channels 47 out individually, in each instance, and to control them in targeted manner.

[0041] As can be seen in FIG. 2, the spray air exit 33 also defines a nozzle exit 35 having a diameter 36, wherein the distance 39 between the nozzle exit 35 and the valve 60 amounts to approximately 3 times the diameter 36 of the nozzle exit 35. Depending on the concrete implementation, the distance 39 can be selected between 0.5 times and 10 times the diameter 36 of the nozzle exit 35.

[0042] The spray head 10 can be used, for example, in the forming machine 24 shown schematically in FIG. 3, which machine is structured as a die-forging press and comprises two dies 20, a lower die 21 and an upper die 22, which can be moved toward one another and away from one another by means of a press cylinder 25.

[0043] For this purpose, the forming machine 24 comprises a lower yoke 26 and an upper yoke 27, which are spaced apart from one another by way of tension rods 28, wherein the tension rods 28 can counteract the pressing forces that the press cylinder 25 applies.

[0044] A movable yoke 29 is guided on the tension rods 28, which yoke can be moved by the press cylinder 25 for pressing, accordingly, and on which the upper die 22 is attached, so that the upper die 22 can be lowered onto the lower die 21, which is disposed on the lower yoke 26, with every work stroke, with a pressing effect.

[0045] As is directly evident, a work space 23 then occurs between the upper and lower die 21, 22, between two work strokes.

[0046] Depending on the concrete embodiment, as is well known, the tools, in particular the dies 20, must be lubricated and/or blown out, in particular when work pieces are produced in constantly repeating manner, so as to guarantee proper functioning.

[0047] The spray head 10, which can be introduced into the work space 23 by way of a spray arm 18, then serves for this purpose.

REFERENCE SYMBOL LIST

[0048] 10 spray head [0049] 12 top side [0050] 14 underside [0051] 18 spray arm [0052] 20 die [0053] 21 lower die [0054] 22 upper die [0055] 23 work space [0056] 24 forming machine [0057] 25 press cylinder [0058] 26 lower yoke [0059] 27 upper yoke [0060] 28 tension rod [0061] 29 movable yoke [0062] 30 two-substance nozzle (numbered as an example) [0063] 31 Laval nozzle [0064] 32 nozzle body [0065] 33 spray air exit [0066] 34 sprayed medium exit [0067] 35 nozzle exit [0068] 36 diameter of the nozzle exit 35 [0069] 39 distance between nozzle exit 35 and valve 60 [0070] 40 feed channel (numbered as an example) [0071] 45 sprayed medium channel [0072] 46 spray air channel [0073] 47 control channel [0074] 50 spray head foot [0075] 55 supply connector [0076] 60 valve [0077] 61 attachment body [0078] 62 sealing ring [0079] 65 valve lid [0080] 69 spring device [0081] 70 housing [0082] 80 atomization nozzle