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公开(公告)号：US3747852A
公开(公告)日：1973-07-24
申请号：US3747852D
申请日：1971-09-02
Applicant: NORDSON CORP
Inventor： SCARBROUGH D , VILAGI B , NORD E , ROSEN S , RUNSTADLER P
CPC classification number: B05B7/0815 , B05B1/042 , B05B5/03 , B05B5/035
Abstract: A method and apparatus for spraying paint and similar coatings. In one form the paint is sprayed at low pressure from a flat fan nozzle. A flat fan of air impinges upon the fan of paint at an angle of from 30*-70*. The air atomizes the paint to form a soft spray with low forward velocity. In another form of the method, two fans of paint are projected toward one another at an angle and an air fan is directed along the bisector toward the zone of intersection. The air fan atomizes both streams of paint. An electrode can be placed in the air stream to ionize the air stream which in turn charges the paint particles. The width of the paint spray pattern is varied by varying the included angle of the air fan. A spray gun is disclosed having two tubular paint nozzles for projecting two fan-shaped fans of paint. An air nozzle is mounted between the paint nozzles for projecting a fan of air against the paint fans to atomize the paint. The air nozzle is adjustable to provide air fans of different angles for varying the width of the paint spray pattern. An electrode is disposed in the air nozzle for ionizing the air stream. This electrode is energized through a resistor and flexible cable. The cable is spring-urged toward the resistor so that when the resistor is removed, the cable shifts causing a safety switch to open deenergizing the gun. When a nozzle mounting member is removed, the cable and surrounding tube are shifted forwardly to automatically close a valve to seal off the air and electrical conduits. Removable caps are provided on the ends of the tubular paint nozzles for facilitating cleaning of the nozzles.
Abstract translation: 一种用于喷涂油漆和类似涂层的方法和装置。 在一种形式中，油漆在低压下从平坦的风扇喷嘴喷射。 平面风扇以30°-70°的角度撞击在油漆风扇上。 空气雾化油漆以形成具有低向前速度的柔软喷雾。 在该方法的另一种形式中，两个油漆风扇以一定角度彼此相对地突出，并且风扇沿平分线朝向相交区域引导。 风扇使两股油漆雾化。 电极可以放置在空气流中以离子化气流，其又对涂料颗粒进行充电。 通过改变风扇的夹角来改变喷漆图案的宽度。
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公开(公告)号：US3764069A
公开(公告)日：1973-10-09
申请号：US3764069D
申请日：1971-07-30
Applicant: NORDSON CORP
Inventor： RUNSTADLER P , NORD E , WILHELM F , HASTINGS D , SCARBROUGH D
CPC classification number: B05B7/0458 , B05B7/1245 , B05B7/2489
Abstract: A METHOD AND APPARATUS FOR ATOMIZING AND SPRAYING LIQUIDS SUCH AS FUEL, PAINT OR WATER IN THE FORM OF MINUTE DROPLETS UTILIZING A SMALL AMOUNT OF AIR TO PROVIDE THE ATOMIZING FORCE. THE LIQUID UNDER A PRESSURE OF FROM 30-100 PSI IS CAUSED TO FLOW IN A THIN FILM. STREAMS OF GAS AT A SLIGHTLY HIGHER PRESSURE ARE INPINGED AGAINST THE LIQUID FILM SO THAT THE GAS IS SHEARED INTO MICROBUBBLES WHICH ARE ENTRAINED IN THE LIQUID TO FORM A FROTH IN WHICH THE LIQUID IS THE CONTINUOUS PHASE, AND IN WHICH THE AIR TO LIQUID MASS RATIO IS FROM 0.1 TO 1.6. THE FROTH FLOWS THROUGH A SPACE IN WHICH THE PRESSURE DECREASES AS THE FROTH MOVES TOWARD A NOZZLE. DURING THIS FLOW THE FROTH BECOMES HOMOGENEOUS. THE FROTH IS DISCHARGED THROUGH A NOZZLE WHEREUPON THE AIR BUBBLES EXPLODE RUPTURING THE LIQUID FILM AND CAUSING THE LIQUID TO DISINTEGRATE INTO FINELY ATOMIZED
DROPS. THE APPARATUS FOR CARRYING OUT THIS METHOD COMPRISES A LIQUID FILM-FORMING CHANNEL CONNECTED TO A LIQUID INLET LINE SUPPLIED WITH LIQUID UNDER PRESSURE, AN AIR INJECTION CHANNEL TERMINATING ADJACENT TO THE LIQUID FLOW CHANNEL, A FLOW SPACE INTERCONNECTING THE LUQID FILM CHANNEL AND A NOZZLE ORIFICE. IN THE PREFERRED EMBODIMENT THE FILM-FORMING CHANNEL IS ANNULAR WITH AIR BEING INJECTED FROM THE OUTSIDE OF THE CHANNEL. IN A MODIFICATION THE LIQUID FILM-FORMING CHANNEL IS PLANAR WITH AIR BEING INJECTED INTO THE FILM FROM ONE OR BOTH SIDES OF THE CHANNEL.-
公开(公告)号：US3734406A
公开(公告)日：1973-05-22
申请号：US3734406D
申请日：1971-07-30
Applicant: NORDSON CORP
Inventor： RUNSTADLER P , NORD E , HASTINGS D , ROSEN S , SCARBROUGH D , WILHELM F
CPC classification number: B05B7/1245 , B05B1/042 , B05B1/265 , B05B1/34 , B05B7/2489
Abstract: A method and apparatus for spraying a coating material such as paint, in a flat fan pattern. In the gun a stream of paint under a relatively low pressure is caused to flow in an annular film. Streams of gas at a slightly higher pressure are directed against the paint film so that the gas is sheared into microbubbles which are entrained in the paint stream to form a froth. The froth flows through a chamber in which the bubbles disperse uniformly in the paint and is then discharged through a narrow slit nozzle effective to give it a fan shape. As the froth is released to atmospheric pressure, the microbubbles of air expand rapidly and rupture, causing the paint to disintegrate into finely atomized drops. The apparatus includes a cooperating orifice plate and collar which define a thin annular paint flow channel; and a plurality of air injection channels which intersect the paint flow channel. Air is introduced through these channels and is directed against the paint film. In the preferred gun, the nozzle includes a hemispherical endwise portion provided with an elongated discharge slot. A protuberance or ball is disposed within the nozzle and deflects the froth so that the froth passes through a relatively narrow passageway between the ball and nozzle. A modified gun includes a conventional airless flat fan orifice; and does not utilize an internal ball.
Abstract translation: 一种用于以平坦的风扇图案喷涂涂料等涂料的方法和装置。 在枪中，使相对较低压力下的油漆流在环形膜中。 稍高压力的气体流被引导到漆膜上，使得气体被剪切成微气泡，其被夹带在涂料流中以形成泡沫。 泡沫流过其中气泡均匀分散在油漆中的室，然后通过有效地使其成为风扇形状的狭窄狭缝喷嘴排出。 当泡沫释放到大气压力时，空气的微泡迅速膨胀并破裂，导致油漆分解成细雾化的液滴。 该装置包括配合的孔板和套环，其限定薄的环形涂料流动通道; 以及与涂料流动通道相交的多个空气注入通道。 通过这些通道引入空气并且被引导到漆膜上。 在优选的喷枪中，喷嘴包括具有细长排出槽的半球形端部。 在喷嘴内设置突起或球，并使泡沫偏转，使得泡沫通过球和喷嘴之间相对狭窄的通道。 改进的喷枪包括常规的无空气扁平扇形孔; 并且不使用内部球。
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