초록

The invention relates to a spray head having a slot-shaped central air outlet opening and preferably a slot-shaped paint nozzle for forming a flat jet of paint in an air-propelled application process.

대표청구항 ▼

1. A spray head for producing a paint fan jet from at least one of a paint spray gun and a paint spray lance, the spray head comprising: an air gate;a paint nozzle having a needle valve;an air cap arranged downstream of the air gate in a direction of air flow;a passage opening for the paint nozzle t

1. A spray head for producing a paint fan jet from at least one of a paint spray gun and a paint spray lance, the spray head comprising: an air gate;a paint nozzle having a needle valve;an air cap arranged downstream of the air gate in a direction of air flow;a passage opening for the paint nozzle to pass, arranged centrally in the air gate;a passage opening arranged centrally in the air cap for at least one of the paint jet and the paint nozzle and a jacket air flow surrounding the at least one of the paint jet and the paint nozzle to pass;at least one air passage opening radially spaced apart from the centrally arranged passage opening in the air gate;at least one air deflecting means arranged on an air passage opening associated therewith in the air cap, and deflecting a passing air jet in a direction of at least one of the paint jet and the paint jet and the jacket air flow surrounding the paint jet;wherein the air passage opening in the air cap and the at least one air passage opening in the air gate have a comparable radial distance from the center of the air cap and the air gate, respectively,wherein the central passage opening in the air cap is made as a slotted air cap opening with a longitudinal length of the air cap opening and a transverse length of the air cap opening, made to be shorter than said longitudinal length,wherein the paint nozzle is made as a slotted paint nozzle opening with a longitudinal length of the paint nozzle opening and a transverse length of the paint nozzle opening, made to be shorter than said longitudinal length,wherein said longitudinal length and said transverse length of the paint nozzle opening extend parallel to said longitudinal length and said transverse length, respectively, of the central air cap opening in the air cap, andwherein the air deflecting means is arranged on a small face of the central air cap opening along said longitudinal length, and a paint jet leaving the spray head is broadened along said transverse length of the air cap opening. 2. The spray head according to claim 1, wherein two air deflecting means are provided symmetrically to the center of the air cap, and at least one relief opening radially spaced apart from the center of the air cap is provided for a relief airstream in the air cap. 3. The spray head according to claim 2, wherein in the air gate, at least one relief air passage is provided a radial position of which corresponds to the radial position of the at least one relief opening in the air cap. 4. The spray head according to claim 3, wherein means are provided which alternatively provide with air either the at least one relief opening or the air deflecting means, and wherein the means are formed preferably by a plate cam having a centrally arranged jacket air passage and at least one control air passage located radially outside of the jacket air passage. 5. The spray head according to claim 2, wherein means are provided which alternatively provide with air either the at least one relief opening or the air deflecting means, and wherein the means are formed preferably by a plate cam having a centrally arranged jacket air passage and at least one control air passage located radially outside of the jacket air passage. 6. The spray head according to claim 5, wherein the plate cam is made to be rotatable in relation to at least one of the air gate and the air cap. 7. The spray head according to claim 2, wherein the at least one relief opening is two relief openings. 8. The spray head according to claim 2, wherein the at least one relief opening is four relief openings. 9. The spray head according to claim 1, wherein the at least one opening in total has approximately the same cross-sectional area as a total of the cross-sectional area of the air passage openings of the air deflecting means. 10. The spray head according to claim 9, wherein in the air gate, at least one relief air passage is provided a radial position of which corresponds to the radial position of the at least one relief opening in the air cap. 11. The spray head according to claim 9, wherein means are provided which alternatively provide with air either the at least one relief opening or the air deflecting means, and wherein the means are formed preferably by a plate cam having a centrally arranged jacket air passage and at least one control air passage located radially outside of the jacket air passage. 12. The spray head according to claim 1, wherein the paint nozzle is connected to the air gate via connecting webs configured integrally by injection molding. 13. The spray head according to claim 1, wherein a produced paint fan jet impinges on a working plane spaced apart from the spray head by a working distance and vertical to the spraying direction, with the longitudinal length of the fan jet and the transverse length of the fan jet, made to be shorter than the longitudinal length of the fan jet, being twisted by 90° about the spraying direction with respect to the longitudinal length of the slotted air cap opening and the transverse length of the slotted air cap opening. 14. The spray head according to claim 1, wherein the at least one air deflecting means is an air horn. 15. The spray head according to claim 1, wherein the spray head is releasably fastened to one end of the one of the paint spray gun and the paint spray lance. 16. The spray head according to claim 1, wherein the spray head is releasably fastened by a union nut which engages in threading on the one of the paint spray gun and the paint spray lance. 17. A spray head for producing a paint fan jet on at least one of a paint spray gun and a paint spray lance, the spray head comprising: an air guide;a paint nozzle having a needle valve;an air cap arranged downstream of the air guide in the direction of air flow;a passage opening arranged centrally in the air guide for the paint nozzle to pass; anda passage opening arranged centrally in the air cap for at least one of the paint jet and the paint nozzle and a jacket air flow surrounding the at least one of the paint jet and the paint nozzle to pass;wherein the center passage opening in the air cap is made as a slotted opening with a longitudinal length of the air cap opening and a transverse length of the air cap opening, made to be shorter with respect thereto,wherein the paint nozzle is made as a slotted paint nozzle opening with a longitudinal length of the paint nozzle opening and a transverse length of the paint nozzle opening, made to be shorter with respect thereto,wherein the longitudinal length and the transverse length of the paint nozzle extend parallel to the longitudinal length and the transverse length, respectively, of the central air cap opening in the air cap, andwherein the air deflecting means is arranged on a small face of the central air cap opening along said longitudinal length, and a paint jet leaving the spray head is broadened along said transverse length of the air cap opening. 18. The spray head according to claim 17, wherein a produced paint fan jet impinges on a working plane spaced apart from the spray head by a working distance and vertical to the spraying direction, wherein the longitudinal length of the fan jet and the transverse length of the fan jet, made to be shorter than the longitudinal length of the fan jet, are pivoted with respect to the longitudinal length of the slotted air cap opening and the transverse length of the slotted air cap opening by 90° about the spraying direction. 19. The spray head according to claim 17, wherein the spray head is releasably fastened to one end of the one of the paint spray gun and the paint spray lance. 20. The spray head according to claim 17, wherein the spray head is releasably fastened by a union nut which engages in threading on the one of the paint spray gun and the paint spray lance.