A kind of spraying method that prevents that the hot sign machine of steel plate shower nozzle from stopping up
Technical field
The present invention relates to the hot sign machine of a kind of steel plate shower nozzle spraying control method, particularly a kind of spraying method that prevents that shower nozzle from stopping up.
Background technology
The hot sign machine of steel plate is arranged in the outlet roller-way zone of main rolling line thermal straightening machine, can carry out the character spray printing at hot steel plate upper surface, and the spray printing mode adopts steel plate to pass through dynamic spray printing, and prestissimo can reach 180 meters of per minute kinds.The hot sign machine of steel plate adopts fire resistant water-based coating as the spray printing medium, and the spray printing steel billet temperature is up to 1050 ℃.
The shower nozzle of the hot sign machine of steel plate is provided with coating chamber, primary atomization air chamber and secondary-atomizing air chamber; During spraying, armature attracts the spool in the coating chamber to open coating chamber spout, the coating ejection, and primary atomization air chamber and secondary-atomizing air chamber ejection high velocity air atomize coating, and the coating after the atomizing is injected in and forms mark on the steel plate; After spraying was finished, the spool return was closed coating chamber spout, and cut off the air in primary atomization air chamber and the secondary-atomizing air chamber, fed rinse water cleaning shower nozzle again in the atomizing space air cavity; After cleaning is finished, cut off rinse water, no longer bubbling air or rinse water in this moment atomizing space air cavity, a mark is finished, pending mark next time such as shower nozzle.
This spraying method, after a mark is finished, coating in the coating chamber will be in the face of the baking of the above high temperature steel plate of several Baidu, and do not have cooling medium that it is lowered the temperature, and the coating in the coating chamber can not be realized automatic circulation, even the employing high-temperature resistant coating, this spraying method equally easily causes coating solidification in the coating chamber, stops up shower nozzle.In the production practices, shower nozzle plugging fault rate height, the blow head maintenance workload is big, and operating efficiency is low.
Therefore need improve hot sign machine spraying method of the prior art, prevent that paint solidification from stopping up shower nozzle.
Summary of the invention
In view of this, the purpose of this invention is to provide a kind of spraying method that prevents that the hot sign machine of steel plate shower nozzle from stopping up, it can prevent that paint solidification stops up shower nozzle in the shower nozzle, reduces the faulty nozzle rate.
A kind of spraying method that prevents that the hot sign machine of steel plate shower nozzle from stopping up of the present invention may further comprise the steps:
A, once spraying beginning continue to charge into compressed air in shower nozzle atomizing space air cavity;
B, open the shower nozzle paint spray nozzle, ejection coating;
C, a coating spraying are finished, and close paint spray nozzle;
D, block compressed air, in the atomizing space air cavity, continue to feed cooling water, when spraying beginning next time, block cooling water;
E, repeating step a to d finish up to the mark operation.
Further, the atomizing space air cavity among the described step a comprises primary atomization air chamber and secondary-atomizing air chamber, and compressed air charges into primary atomization air chamber and secondary-atomizing air chamber simultaneously;
Further, cooling water feeds primary atomization air chamber and secondary-atomizing air chamber simultaneously in the described steps d.
Beneficial effect of the present invention: a kind of spraying method that prevents that the hot sign machine of steel plate shower nozzle from stopping up of the present invention, in spraying process, shower nozzle has lasting compressed air cooling spray, after spraying finishes, shower nozzle has lasting water quench shower nozzle, can guarantee that the coating temperature remains in the low scope in the shower nozzle coating chamber, can the influence of invar plate hight temperature not solidify that the faulty nozzle rate is low; The cooling water that continues ejection simultaneously also can play the dedusting effect to airborne coating dust except the effect of cleaning shower nozzle, cooling spray is arranged, the working environment air is more cleaned.
Description of drawings
Below in conjunction with drawings and Examples the present invention is further described.
Fig. 1 is hot sign machine nozzle structure cutaway view.
The specific embodiment
Fig. 1 is hot sign machine nozzle structure cutaway view.
A kind of spraying method that prevents that the hot sign machine of steel plate shower nozzle from stopping up of present embodiment may further comprise the steps:
A, once spraying beginning continue to charge into compressed air in shower nozzle atomizing space air cavity;
B, open the shower nozzle paint spray nozzle, ejection coating;
C, a coating spraying are finished, and close paint spray nozzle;
D, block compressed air, in the atomizing space air cavity, continue to feed cooling water, when spraying beginning next time, block cooling water;
E, repeating step a to d finish up to the mark operation.
This spraying method, in spraying process, shower nozzle has lasting compressed air cooling spray, after spraying finished, shower nozzle had lasting water quench shower nozzle, can guarantee that the coating temperature remains in the low scope in the shower nozzle coating chamber 1, can the influence of invar plate hight temperature not solidify, the faulty nozzle rate is low; The cooling water that continues ejection simultaneously also can play the dedusting effect to airborne coating dust except the effect of cleaning shower nozzle, cooling spray is arranged, the working environment air is more cleaned.
In the present embodiment: the atomizing space air cavity among the described step a comprises primary atomization air chamber 2 and secondary-atomizing air chamber 3, and compressed air charges into primary atomization air chamber and secondary-atomizing air chamber simultaneously; Twice atomizing can make the coating atomizing more abundant, and mark is more clear.
In the present embodiment: cooling water feeds primary atomization air chamber and secondary-atomizing air chamber simultaneously in the described steps d, and is better to the cooling effect of shower nozzle, more can prevent the paint solidification in the shower nozzle coating chamber.
Explanation is at last, above embodiment is only unrestricted in order to technical scheme of the present invention to be described, although the present invention is had been described in detail with reference to preferred embodiment, those of ordinary skill in the art is to be understood that, can make amendment or be equal to replacement technical scheme of the present invention, and not breaking away from the aim and the scope of technical solution of the present invention, it all should be encompassed in the middle of the claim scope of the present invention.