US1499022A

US1499022A - Sand-blast equipment

Info

Publication number: US1499022A
Application number: US400594A
Authority: US
Inventors: Charles W Mckinley; Earl E Hoffman
Original assignee: Willys Overland Co
Current assignee: Jeep Corp
Priority date: 1920-08-02
Filing date: 1920-08-02
Publication date: 1924-06-24
Anticipated expiration: 1941-06-24

Description

June 24, 1924. 3,49%(122 C. W. M KINLEY ET AL SAND BLAST EQUIPMENT Filed g g. 2. 1920 4 Sheets-Sheet 1 Fig.

INVENTOR. Charles VMSKmIey.

Earl. E. Hoffman. BY/ Ir 7' m' June 24, 1924. 7 1,499,022

c. w. MCKINLEY ET AL SAND BLAST EQUIPMENT Filed Aug. 2 1920 4 Sheets-Sheet 2 Fig. 11.

INVENTOR. Charles V. MEKmk-y. E 2 r1 E. Hoffman.

I N V EN TOR. Charles V M -Kmley. BY Er-I E. Hoffman.

June 24 1924. 1,499,022

C. W. M KINLEY ET A l SAND BLAST EQUIPMENT Fild A 2, 1920 4 Sheets-Sheet June 24 1924.

c. w. MCKINLEY ET AL SAND BLAST EQUIPMENT Filed Aug. 2. 1920' 4 Sheets-Sheet 4 E. III

uwlu llllauuvu I IT 2:-

' INVENTOR. Charles VMSKinley BY Eal E. ofman 7 To all whom it may concern:

Patented June 24, 1924.

3QUN1E s ares PATENT OFFICE.-

CHARLES W. MCKINLEY, OF TOLEDO, OHIO, AND EARL E. HOFFMAN, OF CITY ISLAND, NEW YORK, ASSIGNO'RSTO THE WILLYS-OVERLAITD COMPANY, OF TOLEDO, OHIO,

A CORPORATION OF OHIO.

SAND-BLAST. EQUIPMENT.

Application filed August 2, 1920. Serial No. 40Q,594.

, Be it known, that we, CHARLES IV. Mo- KINLEY and EARL E. HOFFMAN, residin at Toledo, county of Lucas, Ohio, and ity Island, New York County, New York, respectively, have invented certain new and useful Improvements in Sand-Blast Equipment, of which we declare the following to be .a full, clear, and exact description.

' Our invention relates to improvements in sand blast equipment of the type shown in our co-pending application Serial No. 326,- 627, filed September 26, 1919,"and has for its object to provide improved means for handling the abrasive material ,forcleaning different articles of manufacture, particu I larly with respect to the means for collectingthe fine or dust particles of sand or other abrasive material used in the cleaning process.

Another object of the invention is to provide a sand blast house or enclosure for cleanin relatively large bodies such as automo ile bodies and the like, with improved means for conveying different arti- .VGIltlOIl include the hopper construction and cles of manufacture through the enclosure.

Another object of the invention is to provide a sand collecting hopper of improved construction in combination with means for subjecting the particles of sand,

or other abrasive material descending into Another ob ect of the invention is to provide an improved method of removing the dust from the spent sand or other abrasive material used in cleaning articles of manufacture.

Another object of the invention is to. pro vide improved means for removing tliepai ticles of dust adhering to the articles to be cleaned after the same have moved through the compartments in which the sand blasting is effected.

To these and other ends the invention comprises certain novel features of construction and arrangement of parts as will be hereinafter more fully pointed out and claimed, it being apparent to those skilled in the art that the invention shown and described herein is susceptible of various modifications," embodiments and arrangements to suit special or varying conditions and we wish it to be understood that the terms which we have-used are merely descriptive and not limiting and that it is our intention to include any and all modifications which come within the scope of the invention as defined in the appended claims.

A structure constituting one embodiment of our invention is illustrated in the accompanying drawings in which;

I Figure I is a plan view with certain parts the manner of taking 03 or withdrawing 'the dust particles from the spent abrasive material together with the construction of the sand blast enclosure in such a manner as to permit the placing of the mechanism for conveying the articles to be sand blasted outside of the enclosure and also includes the means adapted to be attached directly to the articles within the enclosure for supporting the same. It further includes the improved means provided for effectingtheremoval of dust from the bodies in the last compartment through which they are movedf The remaining portions of the structure shown in' the drawings having been fully described in our co-pending application above referred to, will only be mentioned briefly in connection with the description of the structures forming the essential features of the present invention. While the present structure is designed particularly for use in sand blasting automobile bodies, it will be understood that the same may readily be employed for sand blasting various articles of manufacture not referred to herein. 7

In the present embodiment of the invention, a sand blast house or enclosure is provided having front, intermediate and

rear compartments

10, 11 and 12 respectively, the compartment being that in which the rear end. and cowl of the body is'sanci blasted and the compartment 11. that in which the sides of the body are sand blasted while the compartment 12 is that in which the cleaning or removal of the dust from the body is effected. The compartments 10 and 11 are angularly disposed as shown in Figure I and constitute an L-shaped enclosure. A curtain 13 closes the outer end of compartment 10 and compartments 11 and 12 are separated by a flexible curtain 14 while the outer end of the compartment 12 is closed by a flexible curtain 15 as shown in Figure III. The

side walls 16 and 17 and the end wall. 18 of the enclosure are supported by uprights 19 which are connected with the cross members 20 by suitable gussets 21 while the lower cross members 22 are connected with the uprights 19 by means of gussets 23.

Depending-from the cross bars 20 are the vertical and the

inclined angle bars

24 and 25 respectively, the lower endsof which are connected with the brackets 26 which in turn are connected with the metal roof plate 27 on the opposite side of the center of the enclosure. Secured to the bottom of the roof plates 27 adjacent the-inner edges thereof are the stiffening angles 28 with which are suitably connected transverse brace members 29 having their outer ends connected with the uprights 19 by means of the gussets 30 as shown in Figure IV.

The brace bars 29 and gussets 30 are flanged to receive the lining or ceiling of the compartment which preferably comprises the boards 31 as shown in- Figure IV. In place of the boards however, any other relatively soft material may be used for linin the interior of the sand blasting and 0 can.- ing compartments, it being understood that a lining of this nature will last longer and is very much more satisfactory for the purpose than a metallic lining such as that used heretofore. The side walls of the compartments are also lined with similar material as indicated at 32 and 33, the in- Wardly inclined portions 33 of the side walls serving to prevent the collection of the abrasive material on the bottom of the compartment at the sides thereof and serving also to] discharge said material into the hoppers below the compartments which will presently be described. Windows or screens 34 in the side walls ofthe enclosure serve to permit the attendants to View the work from time to time to determine whether or not the articles are being properly sand blasted and. openings are provided in the ceiling of the enclosur over which are placed the lam reflectors 35 carrying electric lights provided for illuminating the interior of the enclosure to permit the attendants to more readily observe the sand blasting operations. Air for ventilating the compartments may be drawn in through the opening 36, at the center of the ceiling and through the windows or screens 34 if desired. Relatively narrow openings may be provided in the side walls of the compartments to permitthe use of hand operated sand blasting purpose of cleaning any rela itively small areas of the body, not reached by the automatically operated sand blast guns, such as the backs of theseats of the body and other more or less inaccessible parts thereof, said openings being preferably protected by overlapping flexible .members such as soft rubber pads as indicated at '36 in Fig ure III of the drawing; During any hand controlled sand blasting operations, the attendants will of course be\ able to view the articles to be cleaned through the screens or windows 34 as the interior of the compartment is properly illuminated by a suitable lighting system as mentioned above. Sand blast.

guns

37 and 38 project into the compartment 10 and ;are adapted to play upon the front and rear portions of the automobile body while the guns 39 project into the com artment 11 for playing upon the sides 0 the body as indicated in Figure IV. The

guns

37, 38 and 39 are supported and connected in the manner shown, to mechanism for giving thenozzles an oscillatory movement, the operating mechanism being driven by the motor 40. The conveyer mechanism for support-. ing, guiding and moving the bod of the automobileand for preventing tie same from turnin when passing through the L-shaped'encfisure is mounted upon a track 41 and comprises the yoke 42 upon which is swivelled the depending bar 43 carryuns for the ing intermediate its'ends the bracket 44 from which extends the cables 45 to connect with the front and rear portions of the body as shown in Figure III. At the bottom of the depending bar 43 is provided the laterally extending tubular arms or members 46 in which are adjustably mounted the rods 47 to accommodate bodies of different widths and which are provided on their outer ends with the hookshaped holders 48 adapted to hook over the edge of the body as shown in Figure IV whereby it is prevented from tilting and is held in substantially a horizontal position when supported by the cables 43. If desired the hooks or holders 48 may engage the body on the inside thereof to form a support therefor as well as means for maintaining the equilibrium of the same. By suspending the body in this manner with the cables lying in a vertical plane assing through the longitudinal center 0 the said body moves from betweenthe cur tains.

The means for blowing the dust from the body within the compartment 12 comprises the two horizontally disposed pipes 49, each of which is provided with an upstanding.

pipe connected with .a transverse plpe 51 from which extends the longitudinally arranged pipe 52 connected with the laterally extending pipe 53 -leading to the compressed air tank 54 to which air is furnished by the compressor 55 driven by the motor 56 shown in Figure III. Depending from the horizontally disposed pipe 49 on each side of the compartment 12 are a plurality of flexible connections 57,. to the lower ends of which are secured the short pipes 58 each of which is provided with a series of small outlet apertures, through which air is discharged under pressure from the tank 54 against the sides of the automobile body to blow the dust therefrom when the body is passing through the compartment 12 it being understood that when compressed air is released from the tank 54 the short pipes 58 and flexible connections 57 may beset motion to more effectively cause the an being discharged therefrom to play upon the body of the automobile. A short pipe 59.

extends downwardly from the pipe 49 and is provided at its lower end with a flexible ex tension 60 through which'air may be dis charged into the interior of the automobile body for blowing the dust therefrom. The tank 54 is also-1 adapted to furnish compressed air to the

nozzles

37, 38 and 39 through the' pi es 53 and 61, the nozzles 39 being connecte with the pipe 61 by means of the branch pipes 62 and the

nozzles

37 and 38 by means of the

branch pipes

63 and 64 respectively which are connected with the pipe 61 by means of the pipes 65 and 66 as shown in Figure I.

Beneath compartment 10 is a hopper 67 and beneath compartment 11 are the hoppers 68and 69 as shown in Figures II and III. The abrasivematerial discharged upon the articles to be cleaned by the sand blast guns descends by gravity into the several hoppers through a screen from whence it is drawn for subsequent use in sand blasting other articles to be conveyed through the several compartments of the enclosure. The .hop

pers

67, 68 and 69 are of the same general construction and a description of one will suffice for all. Positioned within the hoppers and slightlyabove the side walls thereof are placed the downwardly and inwardly inclined plates 71 for discharging the abrasive material into the center of the hopper. Between said plates and the sides of the hopper are formed suction passageways 72 through which the fine or dust articles of the abrasive material are drawn y suctionwhile said abrasive material is descending into the bottom of the hopper, after passing through the screen 70. Communicating with said passageways 7 2 are suction conduits 73, the outer ends of which are connected with a longitudinally extending conduit 74 which extends upwardly at 75 and downwardly at 76 to discharge into a receptacle 77 beneath which is positioned a hopper 78 from-which the accumulated dust is removed from time to time. The dust is drawn into the receptacle by means of a fan or blower 79 which is driven preferably by an electric motor 80 shown. 1n Figures I andII. Beneath the dust removing compartment 12 of the sand blast enclosure are'screens 81 through which dust is blown from the.

article to be cleaned is drawn into the hoppers 82, with which is connected the suction tube 83, adapted. to discharge into the up.- right suction conduit 75 as indicated in Fig-1 um I. It will be seen therefore that the dust which is blown from the articles to be i cleaned in the compartment 12 together.

with that which is separated from the spent abrasive material descending into the

hoppers

67, 68 and" 69 is all forced into the collector 77 by means of the fan or blower 79. The hopper 69 is connected with the sand blast guns 39 by means of the flexible connection 84 and the hop er 67 is connected with the sand blast gun 3 7 by means of the flexible connection 85, while hopper 69 is connected with sand blast gun 38 by means of the flexible connection '86.

In the sand blasting of automobile bodies or other substantially rectangular objects from which it is desired to remove grease and other forei matter, it is desirable that either the Fddies themselves I be held stationery and the sand blast guns moved relatively thereto or else thatthe sand blast guns be relatively fixed and th'e'body moved in a certain predetermined direction-or di- 'rections in order that thenozzles may play upon the several angularly disposed surfaces to be sand blasted. In the present invention ,we have provided means b which a body is conveyed through a sand lasting compartment or enclosure and'have preferably positioned all of the sandblast guns at relatively fixed points in the path of travel of the body and have mounted them in such a man-f ner as to obviate the necessity of the attend ants entering the enclosure during the sand blasting operation. The enclosure which we have provided is" preferably L-shaped, as 1 shown in Figure I and the body preferably arranged to be brought into the outer end of the enclosure and while passing through compartment 10, the rear end of the body is sand blasted by the automatically operated sand blast gun 38 which is preferably mounted exteriorly of the compartment and adapted to play upon the body through an opening in the wall thereof. The front end or cowl of the body is at the same time or substantially-the same time sand blasted by the gun 37 having its nozzle extending through the lower portion 87 of the ceiling of the enclosure at an angle sli htly to the vertical as shown in Figure III. The body is then passed into the second compartment without turning and while moving therethrough the sides of the body are automatically sand blasted by the guns 39. The sand blast guns 39 for playing upon the sides of the body are likewise relatively fixed and move only within certain limits to accommodate the curved or converging sides of the articles which move the pipe 59 as shown in Figure III all of which are connected with the compressed air tank 54. The body or other article is then passed out of the dust removing compartment and is disconnected from the cables 45 held by the carrier or conveyor which is preferably continuously driven.

While we have illustrated and described one embodiment of our invention, it will be obvious that those skilledvin the art may construct modifications thereof without departing from the spirit of the invention and we wish therefore not to be restricted or limited to the precise embodiment shown except in so far as the-same is limited by the appended claims.

What we claim as new and desire to secure by Letters Patent is:

1. In a device of the class described, a sand blasting enclosure, a hopper beneath the same, one side of which comprisessubstantially parallel inclined spaced walls forming an outlet passage adjacent the top of the hopper, a dust exhausting duct connected with said outlet passage, and means for exhausting dust through said duct.

2. In a device of the class described, a sand blasting enclosure, a hopper beneath the same having an outlet passage adjacent its bottom and an inclined outlet passage adjacent its top, the inner end of which is nearer the center of the hopper than the outlet end, and dust exhausting means connected with the outlet end of said inclined passage.

3. In a device of the class described, a sand carrying hopper having upper and lower inclined spaced walls, the lower ends of the former terminating above the bottom of'the hopper, said spaced walls forming dust outlet passages inclined upwardly and outwardly, and means connected with the outlet ends of said passages for exhausting dust therethrough.

4. In a device of the class described, a sand carrying hopper having upper and lower inclined spaced walls, the lower end of the former terminating above the bottom of the hopper, said spaced walls forming dust outlet passages inclined upwardly and outwardly, means connected with the outlet ends of said passages for exhausting dust therethrough, and a sand blast gun connected with the bottom of the hopper.

5. A device of the class described comprising in combination a sand blasting compartment, a dust removing compartment adjacent thereto, a curtain for separating said compartments, means for sand blasting an article within the first mentioned compartment, means for blowing the dust'from the article within said second mentioned compartment, sand and dust collecting recepill] cent thereto, a curtain for separating said compartments, means for sand blasting an article within the first mentioned compartment, means for blowing the dust from the article within said second mentioned compartment, sand and dust collecting receptacles respectively beneath said blasting and dust removing compartments, each having a dust discharging conduit leading therefrom, a suction producing apparatus connected with said conduits, and means for moving an article to be cleaned through said compartments.

7, A device of the class described comprising in combination a sand blasting compartment, a dust removing compartment adjacent thereto, means for moving an article through said compartments, sand blast guns mounted to oscillate and adapted to play upon the opposite sides of the article through openings in the walls of the sand blasting compartment when the article is moving therethrough, means for effecting the oscillation of the guns, means for blowing the dust from the article within said dust removing compartment, sand and dust collecting receptacles respectively beneath said blasting and dust removing compart-,

ments, each having a dust discharging conments to convey said body therethrough,

and adapted to automatically return to normal closed position when the body is moved out of the sand blasting compartment, a conveyor mounted to travel above said compartsuspension means for the body depending from the conveyor and lying wholly in a vertical plane co-extensive with the line of separation of said curtains, means for sand blasting the body in the first mentioned compartment, and means for removing the dust from the second mentioned compartment.

9. In a device of the class described, a sand blasting compartment, a dust removing compartment, divided flexible curtains between said compartments suspended in a manner to be separated by a body moved from one of the compartments to another and adapted to automatically return to normal closed position when the body is moved out of the sand blasting compartment, a conveyor mounted to travel above said compartments to convey said body therethrough, suspension means depending from the conveyor and adapted to travel in the dividing plane of said curtains, means for sand blasting the body in the first mentioned compartment, means for removing the dust from the body in the second mentioned compartment, and

adjustable means carried by said suspension means adapted to engage the opposite sides of the body to prevent tilting of the same.

10. In a device of the class described, a cleaning compartment having its ends closed by a pair of divided flexible curtains suspended in a manner to be separated by a body moved into or out of the compartment, said curtains being adapted to automatically return to normal closed position when released by the body, an overhead conveyor for moving said body through said compartment, suspension means for the body depending from said conveyor and adapted to travel in the dividing plane of said curtains, means for cleaning the body within said inclosure, and arms carried by the lower extremity of said suspension means and adjustable laterally to engage the sides of the body to maintain the equilibrium' thereof.

In testimony whereof, we aflix our signatures.

CHARLES W. McKINLEY. EARL E. HOFFMAN.