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

IPC: B05B7/00 ,  B05B7/04 ,  B29B17/00 ,  B05B1/06

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：US3747850A

公开(公告)日：1973-07-24

申请号：US3747850D

申请日：1971-11-16

Applicant: NORDSON CORP

Inventor： HASTINGS D ,  WILHELM F ,  SCARBROUGH D ,  TAMNY S

IPC: B05B5/025 ,  B05B5/16 ,  B05B5/02

CPC classification number: B05B5/1608

Abstract: An electrostatic spray system operable to spray either electrically conductive materials or nonconductive materials. The system includes apparatus for mechanically atomizing the coating material and for electrostatically charging it prior to deposition onto an article, which apparatus is characterized by an improved spray gun having improved electrical isolation between the electrically conductive portions of the gun and the nonconductive portions. Specifically, it includes an improved connector for connecting the gun to a supply hose without having to permanently weld the two together to maintain an effective electrical ''''standoff'''' between the hose and the gun. It also has an improved cartridge for sealing the valve stem of the gun. The system of this invention also includes an improved material storage tank and insulative system for isolating that tank from ground when the system is used to spray electrically conductive materials. It also includes a grounding wire for connecting the tank to ground when the tank is used to spray nonconductive materials.

Abstract translation: 一种静电喷雾系统，可操作以喷射导电材料或非导电材料。 该系统包括用于机械雾化涂层材料并在沉积到制品上之前对其进行静电充电的装置，该装置的特征在于具有在枪的导电部分和非导电部分之间改进的电隔离的改进的喷枪。 具体地说，它包括一个改进的连接器，用于将喷枪连接到供应软管，而不必将两者永久地焊接在一起，以保持软管和喷枪之间有效的电气“间隔”。 它还具有用于密封枪的阀杆的改进的盒。 本发明的系统还包括改进的材料储存罐和用于当该系统用于喷射导电材料时将该罐与地面隔离的绝缘系统。 它还包括一个接地线，用于在罐用于喷射非导电材料时将油箱连接到地面。

公开(公告)号：US3794243A

公开(公告)日：1974-02-26

申请号：US3794243D

申请日：1972-04-26

Applicant: NORDSON CORP

Inventor： TAMNY S ,  HASTINGS D ,  WILHELM F

IPC: B05B5/025 ,  B05B5/16 ,  B05B5/00

CPC classification number: B05B5/1616 ,  B05B5/1608

Abstract: An electrostatic spray apparatus and method for spraying coating materials having conductivities ranging from moderately conductive to highly conductive, which is characterized by freedom from electrical shock and ignition hazards occasioned by a grounded operator inadvertently contacting the hose and/or grounding it during use in an explosive atmosphere. Included is a spray gun which can be moved relative to a stationary source of coating material, an improved shock-free and ignition-free conduit for transporting under pressure moderately and/or highly electrically conductive coating materials from the stationary supply to the movable gun, and a source of high voltage unidirectional current for electrostatically charging the coating material prior to deposition thereof onto the article being coated.

Abstract translation: 一种静电喷涂装置和方法，用于喷涂具有中等导电性至高导电性的导电性的涂层材料，其特征在于，在使用期间接地操作者无意中接触软管和/或将其接地时，不受电击和点火危险 大气层。 包括一个可以相对于固定的涂层材料源移动的喷枪，改进的无冲击和无点燃管道，用于在压力适度和/或高度导电的涂层材料下从静止的供给运送到可移动枪， 以及高电压单向电流源，用于在将涂层材料沉积到待涂覆的制品上之前静电充电涂层材料。

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

IPC: B05B7/04 ,  B05B7/00 ,  B05B7/08 ,  A01N17/02

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。