US1161188A - Molding-machine. - Google Patents

Description

S. M. COFFMAN.

MOLDINGVMACHINE. APPLICATION FILED MAY 26. 1913.

Patented N on 23, 1915.

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COLUMBIA PLANOGRAPH CO..WI\SHINGTON, D. c,

-S. M. COFFMAN.

MOLDING MACHINE.

APPLICATION FILED MAY 26. 1913.

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nnrrn SAMUEL M. GOFFIVIAN, OF KANSAS CITY, MISSOURI.

MOLDING-MACHINE.

Specification of Letters Patent.

Patented Nov. 23, 1915.

Application filed May 26, 1913. Serial No. 769,865.

To all whom it may concern:

Be it known that I, SAMUEL M. COFFMAN, a citizen of the United States, residing at Kansas City, in the county of Jackson and State of Missouri, have invented certain new and useful Improvements in Molding- Machines, of which the following is a specification. V

This invention relates to improvements in molding machines, and my object is to provide a machine of this character whereby various kinds of cement or concrete blocks and silo staves can be quickly and accurately produced.

In order that the invention may be fully understood, reference will now be made to the accompanying drawings, in which:

Figure 1 is a broken side elevation of the machine. Fig. 2 is a plan view of the machine. Fig. 3 is a broken section on line TITTII of Fig. 2. Fig. 4 is a broken section on line IVIV of Fig. 2. Fig. 5 is a broken side elevation of the machine with some of the parts in raised position. Fig. 6 is a detail of a matrix plate employed in carrying out the invention.

I Tn carrying out the invention, I employ a mounted therein.

' 7 designates a pair of parallel arms pivotally-mounted at their rear ends upon the rock-shaft 6 and unitedat their forward portions by a table 8 and a concave plate 9,

, which latter constitutes the rear wall of an adjustable matrix 10 in which the blocks are molded. The front wall of the matrix 10 is formed by a convex plate 11, and its-side walls by a pair of arms 12 slidably-mounted on the outer surface of the arms 7, their rear portions being loosely embraced and bar 11 secured at its ends to arms 12. Arms 12 are provided at their forward ends with handles 15, whereby said arms and the parts connected thereto may be raised to the position shown on Fig. 5. The arms 12 are supported in raised position by a U-shaped leg 16, the upper ends of which are pivotallysecured to said arms by pins or screws 17 Leg 16 is controlled by a trip-rod 18 pivotally-connected at its rear end to one of the up-turned ends of said leg 16 and bent outward at its forward end to form a handle 19. The forward portion of the trip-rod 18 extends through an eye in a bracket 20, secured to the forward portion of the adjacent arm 12.

21 designates a rectangular hopper slidable on table 8, and guided by a pair of plates 22, secured to the ends of said hopper and slidably-mounted upon a pair of rails 23, one of which is fixed to the outer surface of each arm 12. Backward movement of the hopper is checked byits rear wall contacting two stops 21 extending upward from arms 7 and forward movement of said hopper is limited by the handle 15.

24 designates a pair of connecting-bars pivotally-secured at their forward ends to arms 12 and at their rear ends to cranks 25 secured upon the ends of the rock-shaft 6 by set-screws 26. One of the cranks 25 has an upward extension 27 to which the rear end of arod 28 is connected, said rod extending forwardly through an eye in bracket 20 and having its front end bent at right angles thereto to form a handle 29.

30 designates a plate secured to the upper portion ofone of standards 2 and provided with stops 31 and 32 arranged in the path of one of the cranks 25,v to limit the movement thereof. Each connecting-rod 24 has three holes, designated respectively 33, 34, and 35 to receive a trunnion 36, whereby it is connected to the adjacent crank 25.

37 designates two pins to limit backward movement of arms 12 upon arms 7 by contacting the members 13. Each pin 37 is adapted to enter any one of three holes in each arm 12, said holes being designated, respectively, 38, 39 and 40.

41 designates an off-bearing board adapted to rest upon the forward portion of the.

sills 3 and support the matrix 10, said offadapted to push the off-bearing board 41 forward as will hereinafter appear.

47 designates a removable division plate any number of which maybe employed to divide thexmatrix 1 0 into as many compartments as it is desired to form blocks the blocks.

at the same time. p i p h 478 designates a removableconcave plate placed against one of theend walls of the matrix, and; 49 designates a removable 1 convex plate placedagainst the opposite end wall of the matrix.

In practice, the material fromwhich the blocks are to be produced is,'=pla'ced in the matrix 10 through hopper 21 and tamped to-the desired density, ,The surplus material is then scraped off by the edge 10* of the hopper, latter is pushed backward against the stop pins 213%,. vThe upper surfaces of the blocks are then troweled after which the arms 12 and the convex wall 11 of the matrix are slid forward to allow .said convex wall toclear the corresponding grooves in the adjacent edges of The forward movement of the convex wall 11 and arms 12 is effected by pulling handle 29 forward to ,raise the cranksj25, which push the connecting bars 24 forward, causing themin turn toadvance the arms 12 until the extension 27contacts the 'stop32. As arms 12 adv ance the pins 46 1contact the rear side of the off-bearing board 41 and push the same forward until the convex edges of the blocks thereon clear the concave wall 9 of the matrix. Handles 15 are then grasped and the arms '12 and parts connected thereto swung upward to the position disclosed'by Fig. 5, where they are supported by leg 16 which automatically drops to vertical position and rests upon sills 3 when handles 15.are released. When the matrix 10 is raised to clear thejblocks, the'plates 47 48 and'4 9 are removed from said blocks, before the same are carried ofi. ,The ofi -bearing board 41, containing the blocks, is then removed and another substituted .therefor, which is placed in positionagainst'thegage members 43. If it is desired to temporarily lower the arms 12 and parts carried thereby, it can be readily accomplished by folding leg 16- through the intermediacy of the trip-rod backward movement of arms 12 lowers the cranks 25 through the intermediacy of the connecting-bars 24. The parts are lowered in the same motion in which the arms 12 are pushed backward until the pins 37 contact 'the members 13, which occurs .at the same time that one of the cranks 25 contacts the stop 31. hen the parts are in lowered position,:arms 12 arelocked from accidental backward movement by the connecting bars 24, the pivotal points ,of which pass below the center of rock-shaft 6 and thus prevent the cranks 25 from rising until actuated by rod 28. By thus locking the arms 12 from back-ward movement the front wall 11 of the matrix is firmly held in place while the material in said matrix is being tamped, hence the blocks will be of uniform size.

The matrix can be adjusted to make narrow blocks by placing pins 37 in holes 38, removing trunnions 36 from holes 34, and pushing arms 12 backward until pins 37 contact members 13, .afterwhich trunnions 36 are placed in holes 33 of the connectingbars. Pins ,46 are then placed in the holes 45 in order to=contact the off-bearing board at the proper time. The matrix-can also be readily adjusted to increase the .width of the blocks by placing pins 37 in holes 40, placing the trunnion-s 36 through the holes 35 of the connecting-bars 24, and placing pins 46 in the holes 45.

.By mounting the machineupon runners it can be readily drawn from place to place as required. 7 i

When it is desired to produce blocks without grooves and corresponding beadsor and means controlled the slidable walls to move the offlbearing boardin one direction through part ofthe movement of said slidable walls. p v

2. In a, machine of the character described, an off-bearing board, a support therefor, a matrix adapted torest upon said ofl' bearing board, said matrix consisting of through a part of the movement of tlie slidslidable walls and a relatively stationary able walls. 10 wall some of which have concave and others In testimony whereof I aifix my signature convex surfaces, angle irons secured to two in the presence of two witnesses.

of the sliclable walls and provided with a SAMUEL M. COFFMAN. plurality of holes, and pins adapted to be Witnesses:

placed in any of said holes to engage and F. G. FISCHER,

move the off-bearing board in one direction L. J. FISCHER.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents,

Washington, D. C.

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