Патент USA US2403994код для вставки
July _16, 1946. 2,403,994 4H. J. PAYNTERv SPRAYING MACHINE 5 Sheets-Sheet 1 Filed June 19, 1944 O\ _ mmio Í M\ _ _ì w_ Qmëwë NIT .mmm „ S ä à _ _ _. ä Q_ äîw. \ / N» _ _ Q_»N «QN» ëä__@mà, _/Q \-l w _E __ ä . _ à _` \ \M \l _ %W\ ._ _ _ NYM .__ ._, è l ` ' INVENTo-R Ä y@ m July 16, `1946. H. J. PAYNTER SPRAYING MACHINE Filed June 19, 1944 'il ` ' 2,403,994 ' 5 sheets-sheet 2 IN VEN TOR. à. WM @f5/bam@ A T Toe/Q5 x5 July 16,1946. H. J. PAYNTER 2,403,994 SPRAYING MACHINE Filed June 19, 19451j 5 Sheets-Sheet 3 July 16, 1946._ H. J; PAYNTER i 2,403,994 SPRAYING MACHINE Filed June 19, ' 5 Sheets-Sheet 5 .l l- l fl JTTOE/YE'YS 2,403,994 Patented July 16, 1946 l UNITED STATES PATENT OFFICE 2,403,994 n SPRAYING MAcHiNE Horace J. Paynter, Union, N. J., assignor to American Can‘Company, New York, N. Y., al corporation of New Jersey ' Application June 19, 1944, Serial No. 540,927 10 Claims. . 1 » This invention relates to a machine for spra - ing surfaces of articles with a coating material and has particular reference to varying the quan tity of coating material in the spray in accord ance with a variation in the distance between the point of discharge and the surface being sprayed to provide an even coating of the material on (Cl. 91-45) 2 and sharp cut-off of the valve may be had while the gun is rotating. Numerous other objects and advantages of the invention will be apparent as it is better under stoodfrom the following description, which, taken in connection With the accompanying drawings, discloses a preferred embodiment thereof. Referring to the~ drawings: such surface. ` . Figure 1 is a longitudinal sectional view of prin In the spray coating of articles, the spray gun used and the article being sprayed> usually are ll) cipal parts of a spraying machine embodying the present invention withv parts broken away and moved relative to each other. When spray coat showing a spray gun in position prior to insertion ing irregular shaped articles according to usual into a can body; methods, portions of the article which are spaced Fig. 2 is a rear elevation of the machine shown farther away from the spray gun receive a thin ner coating of the sprayed material than do por 15 in Fig'. 1, with partsïbroken away; Fig. 3 is an enlarged view similar to Fig, l tions closer to the gun. This results in uneven showing the spray gun in spraying position Within coating which in most instances is undesirable. the can body; The present invention contemplates overcoming Figs; 4 and> 5 are transverse sectional views such difficulties by regulating the discharge from the gun in d1rect proportion to the distance of the 20 taken substantially along the lines 4-4 and 5-5 in Fig. 1; sprayed surface from the point of discharge to Fig. 6 is a perspective detail of parts shown in control the quantity of coating material sprayed upon the surface. An object of the invention is the provision of a Fig. 3; Figs. 7 and 8 are transverse sectional views machine for spraying surfaces with a coating 25 taken substantially along the lines 1_1, 8-8 in Fig. 3; and material wherein the quantity of coating material Fig. 9 is an end View of a rectangular can body discharged from the spraying devices for appli indicating. diagrammatically several positions of cation onto the surfaces is controlled in accord the spray projected against the inside surface of ance with the distance between the surface being the body as an incident to spray> coating such a sprayed and the spraying devices so that a ñlm of surface. > . coating material of uniform thickness will be ap As a preferred embodiment of the instan-t in plied to all surfaces being sprayed. vention the drawings illustrate a machine for Another object is the provision in such a ma spraying a uniform ñlrn of coating material onto chine cf devices for effecting relative movement the inside surfaces of oblong rectangular sheet between an irregular shaped article to be sprayed metal can bodies. However,. the invention is and a spray gun having an orifice controlled by equally well adapted' to spraying outer as well as a needle valve wherein the needle valve is oper other inner surfaces and to other articles having ated in time with the movement and in accord' curved, irregular, or plane surfaces and a more ance with the distance between the gun and the varying surfaces of the article to insure the ap 40 or" a less elaborate machine can be used while ful filling the same principles of invention. plication to the surfaces of a film of coating In the instant machine the can bodies, indi material of uniform thickness. cated by the letter A,A are carried in a. horizontal Another object is the provision in a machine positionfthroug'h a vertically disposed circular of this character of a valve controlled spray gun path of travel which extends through a spraying which is rotatable and insertableinto an article station' X (Figs. 1 and'2). The bodies are ad of irregular contour while the article is held sta vanced in an intermittent or step-by-step man_ tionary for spraying the inside surface of the ner and come to rest individually at the spraying article while varying the quantity of coating ma station for the spraying operation. While at the terial discharged from - the gun in accordance spraying station, a continuously rotating horizon with the contour of the article so that a ñlm of 50 tally disposed spray gun B then in line with the coating material of uniform thickness maybe applied to the surfaces. Another object is the provision in such a ma chine of control devices for the valve in the spray gun wherein quick opening, sensitive regulation, middle of the can body at rest in the station, moves into and out of the body and sprays its interior' walls. Such a gun has a discharge nozzle arranged to direct a single spray against a side 2,403,994 3 4 wall of the body. During this spraying opera tion the quantity of coating material discharged by a spur gear 5| (Figs. 1 and 3) which surrounds from the nozzle is controlled in accordance with the distance between the nozzle and the wall the gun and which is keyed in place on the gun. This gear meshes with and is driven by a. gear being sprayed, It is this controlled operation of 52 which is formed integrally with a wide driving the spray that results in the uniform applica tion of the coating material. _ ì gear 53 constituting a composite gear unit. This lcomposite gear unit is mounted loosely on the u In the instant case where the can body has an oblong rectangular cross section, as best shown 'turret shaft 23 between a pair of retaining bear ings 55, 56 formed on the slide bracket 45. The in'Fig. 9, the distance between the parts of the surface being sprayed and the nozzle varies as ^ ‘ ' the spray gun rotates within the body. The far-` „ . ther away the surface is from the nozzle, the greater will be the area of wall spacecovered -' ‘ by the spray from the nozzle and accordingly the less dense the spray will be. The diagrammatic showing of diñerent locations of the spray stream in Fig. 9 graphically indicates this. With a con stant spray as used in >conventional practices, a thinner film of coating» material will be applied to the more distant surface parts of the body since the spray stream is spread out over a greater surface. In the instant invention this Variation in dis tance is utilized for controlling the nozzle dis charge so that an increased quantity of coating material will be ejected from the nozzle as the distance between the nozzle and the area sprayed increases. In this manner a uniform film of even . Rotation of the spray gun B is brought about retaining `bearings provide support for` the turret shaft intermediate its main .bearings 24, 25 and also retain the composite gear unit in place within the slide when the latter moves, as` will be here inafter explained. The composite gear unit is ' .continuously rotated by a main driving gear 51 carried on the inner en-d of the drive shaft 3|. The spray gun B is shifted into and out of the can body A for the spraying operation by movement of the slide bracket 45 along its slide ways 41 while the body is at rest at the .spraying station. This movement of the slide bracket is brought about by cam action. For this purpose the slide bracket carries a cam roller 6| which operates in a cam groove 62 formed in a barrel cam 63 mounted on and continuously rotated by the drive shaft 3|. The cam shifts the slide bracket and the spray gun carried thereon when the carrier turret 2| is at rest. - Referring now to the details of the spray gun thickness of the coating material is applied to the 30 itself it will be observed that it is made up pri body surface regardless of the contour of the body marily of an outer cylindrical shell 65 (Figs. 3 being sprayed. . ' r‘and ’1) and an inner tube member 66 concentri Reference'will now be had to a more detailed 4cally disposed within the shell and in spaced description of the machine and its operation. relation. This construction sets olf an annular Movement of the can bodies A through a circular air passageway 61 therebetween. The outer ends path of travel toward and away from the spray .of the shell and the tube member, i. e., the end ing station is effected by a rotatable carrier tur adjacent theturret 2|, are secured in a, nozzle ret 2| (Figs. 1, 3 and '1) having a plurality of head 68. The nozzle head is formed with a, ta pockets 22 which are spaced aroundthe periph pered valve seat embodied in Aa needle valve 1| ery of the turret and in which the can bodies are which is located at the horizontal center of the carried. The bodies are deposited in the turret tube member 66. . pockets and are ejected therefrom in any suit -l-Iead 68’is formed with an L-shaped channel able manner. 12 adjacent to and on one side of the valve seat. The carrier turret 2| is mounted on the outer The horizontal leg of the channel communicates end of a horizontal turret shaft 23 (see also Fig. 45 lwith the annular air passageway 61 while the 2) which is carried in a pair of spaced bearings vertical leg of the channel terminates adjacent 24, 25 formed in brackets 26 which extend up -the outer end of the tapered Valve seat and is from opposite ends of a frame 21. This latter disposed at right angles to the valve thus pro~ constitutes the main frame of the machine. ‘viding a. single outlet. The inner or opposite end The turret shaft 23 and the turret 2| carried 50 of the shell 65 carries a stuffing box nut 15 which thereon are intermittently rotated by a conven surrounds the tube member 66 and which holds tional indexing device located at the end of 'the a tapered sealing gasket 1G in place between the machine opposite the turret. The indexing de shell and the tube member. This seals the inner vice includes a Geneva wheel 28 (see also Fig. 5) and a cooperating Geneva actuating arm 29. 55 end of the passageway 61. Compressed air is introduced into the air pas The Geneva wheel is mounted on the turret shaft sageway 51 by way of a pipe 8| which leads from 23. The Geneva arm 29 is secured to one end any suitable source of compressed air. The gun of a drive shaft 3| journaled in spaced bearings end of the pipe is threadedly connected into the 32, 33 (Fig. 1) formed in the main frame of the machine. The ydrive shaft may be driven from 60 upper> half of the split bearing 42 and communi an outside source of power in any suitable man ner, as for example through a gear 34 -mounted on the outer end of the shaft. cates with a recess 62 formed in the bearing. A port 83 in the gun shell 65 constitutes a con nection from the bearing recess to the air pas sageway 61 and directs now of air from the The spray gun B at the spraying station X of the machine is disposed in a horizontal position 65 recess into the passageway as the gun rotates. A flexible ring stufûn-g box device 64 is located in line withvthe middleof a can body brought to in theV bearing recess 82 and surrounds the outer rest at this station by the turret 2|. The gun at shell 65 of the gun. This prevents leakage of air all times is parallel to the turret shaft 23. The pastthe bearing. The stuiiing box device is held gun in general is cylindrical in shape and vis in place by a collar nut 85 threadedly engaged mounted for rotation in a pair of longitudinally in one end of the bearing 42. spaced split bearings 4| , 42 formed in a horizontal Compressed air introduced into the circular air slide bracket 45 (Figs. 1, 3 and 4). The slide passageway 61 flows along the length of the gun bracket is formed with slide tongues 46 (see also and into the L-shaped channel 12 in the nozzle Fig. 5) which operate in longitudinal slideways ¿i1 in the main frame 21. . head 68. The air continually discharges from the outlet end of >the channel in a single jet issuing 7 .2,403,994 8 in a cam groove |67 of a face cam |68 formed in This cam surface is shaped in accordance with the contour of the can body being sprayed, i. e., the outer end of the slide bracket barrel cam 63. The timing of the face cam |68 is thus tied-in with the rotation of the barrel cam 63 and with in accordance with the distance the spray stream must travel at any moment during the gun’s the reciprocationof the slide bracket 45. rotation. Hence on a forward stroke of the slide bracket 45 to insert the spray gun B into the can body A to be sprayed, the face cam |68 rocks the cam lever |55 and the arm |62 and thus lifts the foot Since the control cam is formed as a part of the valve rod and rotates with the spray gun it is always in time with the single jet of spray issuing from the gun nozzle and this insures ac |58 formed thereon. These parts remain in this 10 curate registration of the parts involved in spray position during the entire spraying operation. ing the irregular surface of the body. It is this This lifting of the foot through the actuating control cam that insures the application to the roller |57 thus rocks the bell crank |53 in a clock inner surface of the can body, of a ñlm of coating wise direction (Fig. 3). This movement of the material having a uniform thickness extending bell crank draws the plunger |45 outwardly and 15 over the entire surface sprayed, as hereinbefore shifts the valve actuating sleeve ||| outwardly explained. through the yielding action of the spring |45. It is thought that the invention and many of The yielding action of the compression spring |46 compensates for any overthrow 0f the face its attendant advantages will be understood from the foregoing description, and it will be apparent cam |68 and permits full operation of the cam 20 that various changes may be made in the form, |68 even after the movement of the sleeve in its construction and arrangement of the parts with bearing H2 is arrested by the stopy screw |4l. out departing from the spirit and scope of the This yielding feature permits of accurate adjust invention or sacrificing al1 of its material ad ment for the amount of initial opening of the vantages, the form hereinbefore described being needle valve `|| by utilizing the stop screw to reg 25 merely a preferred embodiment thereof. ulate the travel of the sleeve. I claim: The sleeve movement affects the movement of l. In a machine for spraying a coating mate the valve rod Si to open the valve by the cam rial on a surface, the combination of an elongated roller |36 moving with the sleeve, This roller spray gun having a discharge orifice, said gun presses against the valve control cam surface |35 30 being rotatable on its longitudinal axis, the sur on the rotating flange ||5 of the valve stem |0|. face sprayed being stationary and said gun hav Movement is toward the right asin Fig- 3. Spring |3| is compressed and the rotating disc H8 is pressed tightly against lthe stationary stop plate |2 |. The longitudinal movement imparted to the 35 valve rod Eil withdraws the valve face Q6 from its seat and thus opens the discharge valve 1|. The coating material under pressure within the tube member 86 thus discharges from the valve. ing longitudinal movement relative to said sur face at different distances throughout a spraying operation, a valve rod located in said gun for con trolling the effective size of said orifice, means mounted adjacent said gun for moving said valve rod in opposite directions respectively to open and close said orifice, and means operating adjacent said gun in accordance with the relative distances The air issuing from the outlet end of the 40 between the gun and the surface 'being sprayed channel ‘l2 adjacent the valve 1| blows the dis .- for altering the position of said valve rod when charging coating material into a spray of finely said orifice is open to vary the size of said orifice divided particles and projects it at right angles to and thus control the quantity of coating material the nozzle and against the inside surface of the passing through said orifice to insure a coating can body A. This spray continues while the gun of even thickness on the said surface. moves forward (toward the left as in Fig. 3) 2. In a machine for spraying a coating mate into and through the body and also while the gun rial on the surface of »an irregular shaped tubular moves back in a return stroke. Thus the entire article, the combination of an elongated spray inner surface is covered with a ñlm of the coat gun having a discharge orifice, said gun being ing material. . 60 rotatable on its longitudinal axis, the tubular As the nozzle leaves the edge of the sprayed article being stationary While being sprayed and can body, on the return stroke of the gun, the valve il is immediately closed to prevent waste of coating material. This is brought about by said gun being longitudinally movable relative to said article being sprayed at different distances from the gun, a valve rod located in said gun for a reverse Shifting of the actuating sleeve ||| 65 rcontrolling the effective size of said orifice, means which now moves toward the left, as viewed in mounted adjacent said gun for moving said valve Fig. 3. This is brought about by lowering of the rod in opposite directions respectively to open and foot |58 which first relieves the pressure on the close said orifice, and devices disposed adjacent spring |45 whereupon the sleeve ||| is free to said gun and having a shape corresponding to move. The spring |3| now becomes thiprime 60 the contour of the article surface being sprayed mover and forces the valve rod 97 forward (left) and operating in accordance with the relative first reseating the valve face 36. This closes the distances between the gun and the surface being valve. sprayed for altering the position of said valve rod The description of the opening and closing of when the orifice is open to control the quantity the discharge valve '|| up to the present time has 65 of coating material passing therethrough t0 in not included the further control of the discharge sure a coating of uniform thickness on the said valve 'H to insure the discharge of the coating article. material in carefully measured amounts in ac 3. In a machine for spraying a coating mate rial on the interior surface of an irregular shaped the nozzle head 68 and the wall of the can body 70 tubular can body, the combination of an elon being sprayed. This additional partial opening cordance with the distance intervening between and closing of the discharge valve is brought about by cam surface |35 on the rotating fiange ||5 of the valve rod stem |01 operating over the roller |36 then rotating on a stationary axis. gated spray gun having an orifice for discharging a coating material and an air orifice for ejecting a blast of air at an angle to said discharge orifice for spraying the discharged coating material laterally of said gun onto said can body While the 2,403,994. 9T 10 interior surface thereof, a valve rod located in latter is stationary, said gun being> movable into said gun for controlling the effective size of said said can body and having rotation on its longi orifice, means for shifting the ,sleeve independ tudinal axis throughout a spraying operation, a ently of the slide to move said valve rod to open valve rod located in said gun for controlling the and close said orifice, and devices carried by effective size of said orifice, `means mounted ad said sleeve and operable in accordance with the jacent said gun for moving said valve rod to open distance between the gun and that portion of and close said orifice, and devices connecting with the interior surface of the stationary can body said valve rod and rotatable with said gun and being sprayed for shifting the valve rod after the operating in accordance with the distance be tween the gun and that portion of the surface 10 orifice is open for altering the size of said orifice to control the quantity of spraying material dis of the can body being sprayed for altering the charging therefrom to -provide an even thickness size of said orifice to controlv the quantity of coating material discharging therefrom, whereby a uniform thickness of coating material is applied to the interior surface of the can body irrespec tive of the varying distances of the sprayed sur faces of the can body from said spray gun orifice. 4. In a machine for spraying a coating mate rial on the interior surface of an irregular shaped tubular can body, the combination of an elon gated spray gun having a discharge orifice, said gun being rotatable on its longitudinal axis and longitudinal movement into and out of the can body while the latter is held stationary for a spraying operation, a valve rod located in said gun for controlling discharge of coating material from said orifice, means disposed adja cent said gun for closing said valve rod against said orifice, a cam located adjacent said gun and rotatable therewith, said cam having a surface contour which is variable in accordance with the relative distances between the said orifice and the can body surface for preventing the operation of said valve closing means and for changing the position of said valve rod to vary the quantity of coating material discharging from said orifice so as to provide an even thickness of coating on said can body surface, and means for rendering said cam ineffective when said valve closing means becomes effective. coating on the interior surface of the can body. 7. In a machine for spraying a coating material 15 on the interior surface of an irregular shaped tubular can body, the combination of an inter mittently rotatable support for holding a can body stationary during a spraying operation, an elongated rotatable spray gun having a discharge orifice and being movable longitudinally of its axis into the stationary can body for spraying the interior surface thereof, an elongated valve rod located in said gun and rotatable therewith on ieir longitudinal axes and for controlling the 25 effective size of said orifice, a spring carried by said valve rod for moving the same to close said orifice, and a cam carried by said valve rod and rotatable therewith said cam having a surface of irregular contour for variably overcoming the ac 30 tion of said spring to alter the size of said orifice and thus regulate the quantity of spraying mate rial discharging therefrom, the irregular contour of said cam surface constituting an increment of the distance between the gun and that portion of the interior surface of the can body being sprayed to provide an even thickness coating for the interior surface of the can body. 8. In a machine for spraying a coating mate rial on the interior surface of an irregular shaped 40 can body, the combination of an intermittently rotatable support for said can body, an elongated 5. In a machine for spraying a coating ma spray gun having a discharge orifice for spray terial on the interior surface of an irregular ing the interior surface of a can body while tem shaped tubular can body, the combination of an porarily held stationary on said support, means indexing turret for advancing a can body through 45 for rotating said spray gun on its longitudinal the machine and for holding the body in a sta axis, means connected with said rotating means tionary Aposition during a spraying operation, a for longitudinally reciprocating said gun into and slide having reciprocal movement adjacent- said out of said stationary can body during the spray turret, a rotatable spray gun carried on said ing operation, a valve rod carried by and operated slide and having a discharge orifice, said gun 50 in said gun for controlling the effective size of said being movable by said slide longitudinally of orifice, and devices actuated by said rotating means for longitudinally moving the valve rod to said held can body for spraying the interior sur alter the size of said orifice and thereby vary the face thereof, avalve rod located in said gun for quantity of spraying material discharging there controlling the effective size of said oriiice, means mounted on said slide for moving said valve rod 55 from to apply an even thickness coating to the interior surface of the can body, said variation to open and close said orifice, and devices carried by said slide and having independent movement of spraying material being dependent upon the distance between the gun and that portion of the thereon in accordance with the distance between interior surface of the can body being sprayed. the gun and that portion of the interior surface 9. In a machine for spraying a coating material of the held can body being sprayed for further 60 on the interior surface of an irregular shaped can moving said valve rod after the orifice has been body, the combination of a turret for presenting opened for altering the size of said orifice to con can bodies for a spraying operation, a spray gun trol the quantity of spraying niateriai discharg having a discharge orifice, a valve rod carried by ing therefrom to provide an even thickness coat 65 and operated in said gun for controlling the effec ing on the interior surface of the can body. tive size of said oriñce, means for moving said tur 6. In a machine for spraying a coating mate ret intermittently and for holding a can body rial on the interior surface of an irregular shaped stationary, means for reciprocating said spray gun tubular can body, the combination of a support to move its discharge orifice into said stationary for holding a can body stationary during a sprayn ing operation, a slide having reciprocal movement 70 can for spraying, means for continuously rotat ing said spray gun to pass said discharge orifice adjacent said support, a sleeve carried on said along the interior surface of the irregular shaped slide and movable thereon, a rotatable spray gun can body, and devices for actuating the said valve carried on said slide and having a discharge ori rice, said gun being movable by the slide longi 75 rod in accordance with the distance between the gun and that portion of the interior surface of tudinally into the held can body for spraying the 11 2,403,994 the can body being sprayed to regulate the quan tity of spraying material discharged from said orifice to insure an even thickness coating on the interior surface of the can body. l0. In a machine for spraying a coating mate rial on the interior surface of an irregular shaped tubular can body, the combination of an inter mittently rotatable turret for successively pre _12 body to be sprayed, a valve rod movable Within said gun for controlling discharge of coating ma terial from said orifice, a cam located adjacent said gun and having rotation therewith, said cam having a cam surface constituting an increment of the shape of said can body, a sleeve movable with and relative to said gun and enclosing said cam, an adjustable stop for limiting said sleeve senting can bodies for a spraying operation, a ro movement, and means carried by said sleeve for tatable spray gun having a discharge nozzle, said engaging said cam surface to alter the position gun being movable longitudinally into a station 10 of said valve rod to vary the quantity of coating ary can body for spraying the interior surface material discharging therefrom, whereby an even thereof, means for intermittently rotating said turret for temporarily holding stationary a can thickness coating is applied to the said surface. HORACE J. PAYN'I‘ER.