US2205035A

US2205035A - Horizontal core machine

Info

Publication number: US2205035A
Application number: US203173A
Authority: US
Inventors: Henry G Floyd
Original assignee: Mcwane Cast Iron Pipe Co
Current assignee: Mcwane Cast Iron Pipe Co
Priority date: 1936-10-27
Filing date: 1938-04-20
Publication date: 1940-06-18
Anticipated expiration: 1957-06-18

Description

June 18, 1940. H G, FLOYD HORIZONTAL CORE MACHINE original Filed oct. 27, 193e 5 Sheets-Sheet 1 June 18, 1940. H. G. FLOYD HORIZONTAL CORE MACHINE Original Filed Oct. 27, 1936 5 Sheets-Sheet 2 torneg June 18, 1940. H. G. FLOYD 2,205,035

HORI ZONTAL COvRE MACHINE Original Filed Oct. 27, 1936 5 Sheets-Sheet 3 Snventor 5y a? @m4/Catering June 18, 1940. H. G. FLOYD 2,205,035

HORIZONTAL CORE MACHINE Original Filed Oct. 27, 1936 5 Sheets-Sheet 4 Jnventor June 18, 1940. H. G. FLOYD HORIZONTAL CORE MACHINE 5 Sheets-Sheet 5 Original Filed Oct. 27. 1936 www ffnry G, Floyd.

v drical castings.

Patented June 18, 1940 "si stars ris McWane Cast Iron Ala.

Pipe Co., Birmingham,

Original application October 27, 1936, Serial No. 107,889. Divided and this application April 20, 1938, Serial No. 203,173

5 Claims.

l The invention relates to new and useful irnprovernents in horizontal core machines for making green sand cores employed in the manuiac ture of cast iron pipes or similar hollow cylin- This application is a division of my copencling application for Letters Patent filed October 27, 1936, Serial No. 107,889, for irnprovements in Horizontal core machines.

Among the several objects of this invention are to provide means for supporting a core bar for horizontal rotation about its longitudinal axis to receive a thin sheet of green sand from a suitable sand feeding means located thereabove; to provide means for continuously rotating the core bar at a constant speed and for retaining the same against endwise movement; to provide a pattern knife for shaping the core being made; to provide means for adjustably setting the knife 'with respect to the core; to provide a knife of removable sections; to provide a holder for the knife which together with the knife constitutes a readily removable unit; to proiride manually operable means for moving the knife from an operative position to an inoperative position whereby the finished core may be removed without contacting the knife, and to provide a deflector associated with the knife for directing surplus sand to the bottoni hopper.

With these and other objects in viewv which will more fully appear, the nature of the invention will be more clearly understood by following the description, the appended claims, and the several views illustrated in the accompanying drawings.

In the drawings:

Figure 1 is an end elevation illustrating the invention,

Figure 2 is an. enlarged rear elevation of the core bar support and pattern knife mounting,

Figure 3 is a left end elevation thereof,

Figure 4 is a right end elevation thereof,

Figure 5 is an enlarged sectional view taken on the line 5-5 of Figure 4,

Figure 6 is an enlarged sectional view taken on the line Eiof Figure 4,`

Figure `7 is an enlarged sectional view taken on theline 'iL-'i of Figure 3,

Figure 8 is an enlarged front elevation of the construction shown in Figure 2,

Figure 9 is a top plan View thereof, the knife supporting channel bar being shown in section,

Figure 10 is an enlarged cross section taken on the line lil-l0 of Figure 8 and showing the pattern knife in operative position, Y

.Figure l1 is a similar view but showing the knife in its inoperative position,

Figure 12 is a detail section showing the stops for the crank shaft,

Figure 13 is a vertical section taken on the line iii-"3 of Figure 2,

eye bolts, and

Figure 20 is a perspective view of another eye bolt.

Like reference numerals designate corresponding parts throughout the several figures of the drawings.

The core bar lThe core bar J includes an elongated tubular body portion M53 of metal having an enlarged end portion illll which is provided with an yannur lar flange 505. See Figures 2, 4 and 8.

The core bar support The ocre bar J is mounted on a support I for horizontal rotation about its axis directly below a sand feeding means generally designated F. The support 1 includes a pair of spaced standardsv it, itil which are mounted on thefloor or ground.

Mounted on the standard 10S is a post 10B which is formed by a metal plate, and rotatably mounted on the upper end thereof are two idler rollers iii, lill of like diameters, and having their axesin a common horizontal plane. These rollers are spaced a short distance apart and conjointly forni a rolling support for the body portion E03 of the core bar. rollers are provided with tires rubber or other suitable -material for frictionally.

contacting ther core bar.

Mounted on the standard |01 is a post H3 which is hollow to forni a gear Journaled in the upper portion of the post I3 are two horizontal driven shafts Elfi, H5 whose axes are in a common horizontal plane. Fixed on the inner ends of these shafts are driven rollers i IB, lil which are of like diameters and are spaced Preferably these Y apart and conjointly form a rolling support for the enlarged end portion |04 of the core bar. These rollers are preferably provided with tires H8, H9 of rubber or other suitable material for frictionally contacting the core bar. Fixed on the shafts and located within the hollow posts H3 are driven gears |26, |26 of like diameters. The gears |20, |26 are rotated in the same directions by a driving gear |2| which is also located within the hollow post H3. This gear |2| is fixed to a drive shaft |22 journaled in the post H3 below the driven shafts H4, H5. The outer end of the drive shaft is provided with a pulley |23 which is driven by a belt |24 from an electric motor |25. See Figure 1. It will therefore be seen that the core bar J is continuously rotated at a constant speed. Access to the gears may be had by removing a cover plate |26 which closes an opening in the rear side 0f the hollow post H3. See Figure 13.

Fixed on the outer end of the driven shaft H4 is a grooved roller |21 which receives the flange |65 of the core bar and thereby retains the latter against endwise movement although permitting rotation thereof. Thus, that portion of the core bar which receives the coating of sand from the sand feeding means F, is maintained in register with said means and with the pattern knife hereinafter described.

The pattern knife and support therefor Secured to the posts |66, i3 of the support are inwardly extending brackets |28, |29, and disposed intermediate said brackets is a supporting bar |36 preferably of channel shape and including a vertical web |3| and top and bottom flanges |32, |33. This supporting bar is disposed in parallelism with the core bar J and is located below and slightly in rear thereof. This supporting bar |36 is rigidly connected to the bracket |28, |29 through the medium of coupling plates |34, which overlap the brackets and the adjacent ends of 'the bar. The inner ends of the plates are welded or otherwise rigidly secured to the web |3| of the bar and the outer ends of the plates are rigidly and removably secured to the brackets by screws |36 and |31.

A holder |4| for the pattern knife K is of angle iron construction and includes an upwardly inclined ange |42 and a downwardly inclined flange |43. Secured to the rear face of the downwardly inclined flange |43, preferably by welding, are spaced transverse supporting arms |44, |44 of similar construction. Each supporting arm is formed at its upper end with a rearwardly and downwardly extending hook' |45, the lower end of the arm. projecting below the flange |43 and formed into a forwardly and upwardly extending hook |46. The hooks |45 are removably pivoted on horizontal pins |41, |41 mounted in the overhanging arms |39, |39. See Figures 10, 11, 15 and 16. The pattern knife K is removably attached to the upper face of the ange |42 of the holder by screws |43 which project through transverse slots |66 in the knife whereby the knife may be adjusted forwardly or rearwardly on the holder. Preferably the knife is formed of a plurality of interchangeable sections |50. See Figures 2 and 14. Thus it will be seen that the knife K is supported for swinging movements about an axis disposed in parallelism with the core bar, whereby the knife may be moved from an operative position to an inoperative position, and vice versa. It will also be. observed that the knife K together with the holder |4| may be readily removed as a unit from the support |30 whenever it is desired to substitute another knife. The ends of each pivot pin |41 project beyond the arms |39, and pivotally supported thereon is a lever |5|. Each lever is formed of metal and includes spaced vertical arms |52, |52 which are connected by upper and` lower webs |53, |54 and an intermediate web |55. The upper Web |53 extends forwardly of the arms |52 to form a downwardly inclined arm |56. The lower web |54 extends forwardly of the arms |52 beyond the forward end of the arm |56 to form a guide arm |51 having a guide opening |58 therein which is located directly below the associated hook |46. It will be observed that these levers 5| are located in front of the supporting bar |30. The intermediate web extends rearwardly beyond the arms |52 to form a cam follower |59. An adjustable stop screw |66 which is threaded into an opening |6| located in each supporting arm |44 between the flange |43 and the hook |46, bears against the downwardly inclined arm |56 of the lever |5| for the purpose of providing means for adjusting the position of the knife edge with respect to the coating of sand on the core bar. This permits the knife to be accurately set for a core of a predetermined diameter. Yieldable means are provided for retaining each stop screw |60 in contact with the arm |56. To this end, the eye |62 of an eye-bolt |63 is engaged` in the hook |46 of the associated supporting arm |44, and the lower end of the bolt is projected through the guide opening |58 of the guide arm |51. A nut |64 is threaded onto the lower end of the bolt and a coil spring |65 is interposed between the guide arm |51 and the nut |64. By means of the nut |64 the yielding contact between the stop screw |60 and the arm |56 may be adjusted to suit conditions. See Figures 10 and 11.

A downwardly and rearwardly inclined deflector plate |8| extends longitudinally above the cam shaft |68 ywith the upper edge thereof underlying the lower edge of the knife K. This plate is attached by screws |82 to the inclined faces |40 of the brackets |38. An intermediate supporting bracket |83 is welded to the upper flange |32 of the supporting bar |30, and the central portion of the deflector plate is attached thereto by a screw |84. The surplus sand from the core which is being formed, gravitates onto the knife K and from the knife the sand is directed by the deflector |8| over the cam shaft |66 and into the bottom sand hopper B. See Figure 1.

In operation, a core bar J is positioned on the rollers of the support I, and the bar is continuously rotated at a constant speed through suitable power transmitting connections |2| from the motor |25. A thin sheet of sand gravitates onto the core bar throughout the length thereof corresponding to the length of the core to be made. As the sand builds up on the core bar, the core thus being formed is shaped by the pattern knife K, and the surplus sand from the core is directed into the bottom hopper B by the deflector plate IBI. As soon as the core has been formed, feeding of sand from the means F is discontinued and the pattern knife K is swung to its inoperative position by the crank handle |16, and the core can then be removed without contacting the knife K.

It is of course to be understood that the details of structure and arrangement of parts may be variously changed and modified without departing from the spirit and scope of my invention.

I claim:

1. In a horizontal core machine, the combination with means for supporting a core bar for horizontal rotation about its longitudinal axis, of a patternknife associated with the core bar for shaping' the core, and manually operable means including a cam shaft and a lever operated thereby for moving the knife from an operative to an inoperative position.

2. In a horizontal core machine, the combination with means for supporting a core bar for horizontal rotation about its longitudinal axis, o-f a knife support located at one side of the core bar and extending longitudinally thereof, a knife holder mounted on the support to swing about an Aaxis disposed in parallelism with the core, a pattern knife mounted on the holder for shaping the core, a lever pivoted on the support, means for yieldably retaining the holder in contact with the lever, a manually operable cam shaft mounted on the support, a cam on said shaft, a cam follower mounted on the lever, and means connecting the lever and the support for yieldably retaining the cam follower in contact with the cam.

3. In a horizontal core machine, the combination with means for supporting a core bar for horizontal rotation about its longitudinal axis, of a pattern knife associated with the core bar for shaping the core, manually operable means including a cam shaft mounted on the support for moving the knife from an operative position to an inoperative position, and a deflector plate mounted on the support above the cam shaft and underlying the knife for directing surplus sand from the knife over the cam shaft.

Ll. In a horizontal core machine, the combination of a pattern knife, drive rollers for supporting and imparting rotation to a core bar in position for having a sand core building up thereon engaged by said knife, spring means for urging the knife into'contact with said building sand core, manually operable rotary cam means for moving the knife out of Contact with said sand core against the action of said spring means, and stop means for limiting rotary movement of the cam means in each direction for determining limits of movement of the knife toward and from the sand core.

v5. In a horizontal core machine, the combination of a pattern knife, drive rollers for supporting and imparting rotation to a core bar in position for having a sand core building up thereon engaged by said knife, spring means for urging the knife into Contact with said building sand core, manually operable rotary cam means for moving the knife out of contact with said sand core against the action of said spring means, stop means for limiting rotary movement of the cam means in each direction for determining limits of movement of the knife toward and from the sand core, and additional adjustable means for varying the knife positioning effect of said rotary movement limiting stop means.

HENRY G. FLOYD.