US1480131A - Squeeze machine - Google Patents

Description

Jan. 8 1924. 1,480,131

T. K. WEBSTER, JR

SQUEEZE MACHINE Filed May 26. 1921 2 Sheets-Sheet 1 Jan. 8 1924.

T. K. WEBSTER, JR

SQUEEZE MACHINE File y 26. 1921 2 Sheets-Sheet 2 6 .1 8 111; I11 Q Q uh & B \h 6 Q n \g same purpose.

Patented Jan. 8, 1924.

TOWNER K. WEBSTER, JR., OF WINNE'I'KA, ILLINOIS, ASSIGNOB TO FRANK D. CHASE,

INC., OF CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

SQUEEZE MACHINE.

Application filed May 26, 1921.

Z '0 all whom it may concern Be it known that I, TOWNER K. WEBSTER, J12, a citizen of the United States, residing in l/Vinnetka, in the county of Cook and State of Illinois, have invented a new and useful Improvement in Squeeze Machines, of which the following is a specification.

This invention relates to machines for compressing or compacting sand in foundry flasks.

It has for its principal object the provision of a machine of more eflicient action and which may be constructed of lighter material than those previously used for the The machines in use prior to my invention to compact or compress the sand in a flask through the utilization of power as contradistinguished from hand ramming have been of two characters; one of these is the plain squeeze machine which compacts the sand by pressure exerted upon it and the other is a machine wherein the flask with its sand body is jolted or jarred.

My invention contemplates relatively rapid and less violent action upon the sand producing a shaking and vibratory action as contradistinguished from a jolting or jarring one. Furthermore, it contemplates the application of these arch preventing and destroying impacts from the side. The repeated impact forces thus supplied are not in the line of the compressing force which has formed the arch but transversely there of. Pressure is applied to the sand and the vibratory action prevents the forming of arches of sand particles resisting the press ing forces and breaks the arches if they form.

The invention has for a further object the material shortening of the time required in connection with a molding machine to produce a flask charged with sand of desired compactness and to permit of the proper filling of a deeper flask.

My invention contemplates in this regard the provision of a molding machine or flask ramming machine, which by reason of its construction and operation will materially increase the fluidity of the sand charge deposited in the flask. During the applica tion of pressure rapidly recurring vibrations are imparted to the sand body so that its individual particles are in continued motion. They move, therefore, over each other with a sliding, as contradistinguished from Serial No. 472,791.

a starting, friction and the pressure is thus transm tted to the face of the pattern and the desired compactness attained even within the pockets and throughout the sand body.

Another object of the invention is the provision of simple, easily controlled means for operating upon the sand, and which will not be likely to require adjustment or frequent repair or replacement of parts.

Numerous other objects and advantages of the invention will be apparent as it is better understood from the following description, which, taken in connection with the accompanyingdrawings, discloses a preferred embodiment thereof.

Referring to the drawings, 7

Figure 1 is a side elevation of an apparatus embodying my present invention;

Fig. 2 is a transverse vertical partial section; and

Figs. 3 and 4 are enlarged sections through the control valve.

For the purpose of illustrating my present invention I have shown on the drawings a standard squeeze machine to which struc ture a form of my invention has been added. This machine comprises the usual frame 11 which may be mounted upon rollers 12 or otherwise as may be desired and is provided with a cross-web 13 carrying an hydraulic cylinder 14 in which is mounted an hydraulic piston (not shown in detail) from which extends a piston rod 15 carrying at its top a support 16. Upon this support is mounted a flask receiving table 17 upon which the flask 18 is adapted to be placed and locked in position by pins 19 disposed through openings 21 in the flask. peripheral flange 22 and into apertures 23 in the support 16. The table with the flask is lifted against an overhead compression member 24: held stationary during the compression action. This overhead compressor member is carried upon an arbor 25 through the ends of which extend threaded rods 26 and is locked in adjusted position by nuts 27. The rods 26 are secured at the lower ends in sleeves 28 extending up from collars 29 fixed on a cross-shaft 31 mounted in bearings 32 in the bottom of the web 13. Upon the shaft 31 are lined collars 33 and each of which engages a spring 34:, the other end of which is connected or disposed behind the web 13 or hydraulic cylinder 14. This arrange ment permits the arbor with its upper com J bratortl oi the fluid pressure type. Pockets 46 are provided in the upp'o'rl'a'ce oi" the support and these register with pockets e7 provided in the under face otthe table to re ceive balls or other anti-friction rolling ele- 7 merits 48. The pocketsare curved or otherwise 't'or'med, as shown, so that when the table is shifted laterally under the action of the fluid pressure plunger i5 the surfaces oi the pockets act in wedge fashion upon the balls with thetendency to-li'mit the movement and to lift the flask in a further compressive action. Fluid under pressure is supplied fro'm'any suitable source for example the pipe 49 to a valve 51 which c01itrols, in the present instance, the entire sand compressing action. Froni this valve a pipe line 52 leads to the vibrator ll.

Theconstruction of this valve is such that when its handle 5 l is manipulated, fluid under-pressure is first introduced to the vibrato'r and then to the compressor cylinder and after the actionis completed is first cut off from the vibrator and later from the compressor. Two sections through this valve are shown and it will be noted that in addition to the ca'sing 51 there are two concentric movable valve members 55 and Fig. 3 shows a section taken through the port 57, which discharges to the vibrator and, Fig. 4 shows a section tl'irongh the port 58 discharging to the cylinder l l.

The inner valve member 56 is the one attached to the handle 5% and is provided with a pin 59 engaging in a" slot 61 in the member 55. The inlet port, indicatedby reference character 62, connected at its inlet side to a vertical passage 63 having a slde extension pocket 64L. The valve member 56 has a drametric port 65 adapted to be brought into registration with the port 57 and in contact with a port 66 through the valve members 55 at one side and with a wider port 67 in this member at the other side. The arrangement shown in Fig. 3 is that assumed by the parts when the vibrator ll is opened to pressure. When it is desired to close this port the ha'nd'leis turned moving the pin 59 in a clockwise direction causing the pressure to be immediatelyinterrupted by movement of se ta a over the port 66. Continued movement, as will be presently described, lief at the compressor cylinder 14 ovement' of the valve member 55. v This out lor 55 halt formed by port 63 and extension 6 lthereof and moves the part 0 up toward port 57 but not across it. It now the handle is moved in the opposite direction the member55remains stationary while the pin 59 is moving in the slot 61 so that the part a oi valve member 56 uncovers the port 66 and immediately reestablishes communication between the vibratorcylinder and before movement of the valve member 55 has taken place.

The valve 56 is the part that controls the admission of fluid, under pressure to the compressor cylinder let. 4

Referring now to F 4: it will be noted that the valve member 55 has a port v'Tl adapted to be'brought into registration with the port 62, already mentioned, and a second and wider port 72 that is adapted to be brought into communication with the port 58 01' an outlet of exhaust port 73 through the side of the valve casing. The ports 58 and 73 have extension toward each other, as indicated at M and 75, to permit the widened port 72 to establish communication between the cylinder 1 1- a'nd theexhaustport when the valve 58 is movedin' avclocle wise direction from the position shown in Figa l.

At the. level opposite the outlet 5'8 the inner valve member 56 is partly cut away at 76 so that this valve'momber willn'ot in teri'erein any position with the delivery of fluid to the cylinder 14. When arranged as in F at it will be noted that communication is established between the source of fluid under pressure and the cylinder 14. When, however, the handle is moved in a clockwise direction the inner valve member 56 is stationary until the pin 59 engages the opposite end of the slot 61. At this point, as has been stated, the vibrator has become inoperative and further movement or the handle results in accon'i'panying movement at tl'ic valve part 55 causing its port cl to close the inlet port 62 and at the same time aarrange, the port- T2 in communication with the extensions Tet and 75 of the ports 58 and 73. I

i Vhen the valve handle is moved in the opposite direction to bring the compressor into action the valve member 56 n10ves first permitting lluid under pressure to' be admitted to the vibrator, already described, the valve part being stationary until the pin has arrived at the opposite end of the slot, further movement thereafterarranging the parts as shown in Fig. 4;. I

will be notedth'at the vibrator may be attached to machines already constructed and in use by merely arranging theballsbe-I tween the table and support, adding the bracket with its vibrator and substituting the control system with its piping for that previously use.

is a meagre that are alienate tria- Hire-v lll) of its attendant advantages will be understood from the foregoing description, and it will be apparent that various changes may be made in the form, construction and arrangement of the parts without departing from the spirit and scope of the invention or sacrificing all of its material advantages, the form hereinbefore described being merely a preferred embodiment thereof.

I claim:

1. In a machine for forming sand molds, the combination of squeezing mechanism -for compressing the sand in the mold a support with respect to which a part of the mold is transversely movable, and means for vibrat ing the sand during its compression by reciprocation of said movable mold part.

2. In a. machine for forming sand molds, the combination of squeezing mechanism for compressing the sand in the mold a support with respect to which a part of the mold is transversely movable, and means for vibrating the sand laterally of the squeezing pressure during the compressing of the sand by reciprocation of said movable mold part.

3. In a machine for forming sand molds, the combination of squeezing mechanism for compressing the sand in the mold a support with respect to which a part of the mold is transversely movable, and means for imparting short stroke, rapidly recurring vibration to the sand during its compressing by reciprocation of said movable mold part.

4. In a machine for forming sand molds, the combination of squeezing mechanism for compressing the sand in the mold, and means for vibrating the sand both across and in the line of pressure during the compressing.

5. In a machine for forming sand molds, the combination of a movable compression member, a fixed compression member, said members being adapted to receive a mold therebetween, a. support with respect to which the mold is transversely movable, and means for vibrating the mold by lateral reciprocation of said movable member.

6. In a machine for forming sand molds, the combination of a compressor, a support, a table carried by said support, anti-friction devices between said table and support, a compression member located above the table, and means for vibrating said table during the exertion of pressure by said compression members upon the sand in the flask.

7. In a machine for forming sand molds, the combination of a compressor, a support,

a table, said table and said support having registering pockets, anti-friction rolling elements mounted in said pockets, and means for vibrating the table during the exertion of pressure by said compressor on the sand in a flask upon said table.

8. In a machine for forming sand molds, the combination of a compressor, a support, a table, said table and said support having registering pockets, anti-friction rolling elements mounted in said pockets, and means for vibrating the table during the exertion of pressure by said compressor on the sand in a flask upon said table, said pockets being of form to produce a wedging and resulting increased compression action under the action of said vibrating means.

9. In a machine for forming sand molds, the combination of a fluid pressure compressor, a fluid pressure vibrator, a source of fluid under pressure, and a common control valve for said compressor and vibrator.

10. In a machine for forming sand molds, the combination of a fluid pressure compressor, a fluid pressure vibrator, a source of fluid under pressure, a common control valve for said compressor and vibrator, said valve introducing fluid under pressure to said vibrator in advance of said compressor.

11. In a machine for forming sand molds, the combination of a fluid pressure compressor, a fluid pressure vibrator, a source of fluid under pressure, a common control valve for said compressor and vibrator, said valve relieving said vibrator of pressure prior to the relief of said compressor.

12. In a; machine for forming sand molds, the combination of a fluid pressure compressor, a fluid pressure vibrator, a source of fluid under pressure, a common control valve for said compressor and vibrator, said valve introducing pressure to said vibrator in advance-of said compressor and insuring delivery of pressure to said compressor after relief of said vibrator.

TOWNER K. WEBSTER, JR.

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