US1692355A

US1692355A - Block-molding machine

Info

Publication number: US1692355A
Application number: US148674A
Authority: US
Inventors: Francis J Straub
Original assignee: Individual
Current assignee: Individual
Priority date: 1926-11-16
Filing date: 1926-11-16
Publication date: 1928-11-20
Anticipated expiration: 1945-11-20

Description

Nov. 20, 1928.

F. J. STRAUB BLOCK MOLDING MACHINE Filed Nov. 16, 1926 2 Sheets-Sheet 1 Patented Nov. 20, 1928.

FRAN CIS J. STRAUB, OF NEW KEN SIN GTON PENNSYLVANIA.

BLOCK-MOLDING MACHINE.

Application filed November 16, 1926. Serial No. 148,674.

This invention relates to improvements in the manufacture of building material, as blocks, bricks, etc., made from concrete aggregate.

6 It has for its object to produce a block having a finished or trowelled face, by means of vibrating or reciprocating movement of one of the molding surfaces, during manufacture in the usual molding and pressing machine.

Thisinvention consists in certain features of improvement in such a machine, constructed and adapted to operate, as hereinafter more fully described.

In the drawings, showing one preferred embodiment of the invention,

Fig. 1 is a part plan part horizontal section, on the line I, I, of Fig. 2, showing the machine;

Fig. 2 is a longitudinal sectional view on the line II, II, of Fig. 1;

Fig. 3 is a partial view, like Fig. 1, showing a modified construction, in a single block machine;

Fig. 4 is a vertical cross section on the line IVIV, of Fig. 2; i Y

Figs. 5 and 6 are views in side elevation and cross section respectively, showing a modified form of molding wall.

The mold 2 of the machine is mounted on frame 3 and is provided with the usual core bridge 4, cores 5 and pressing plate 6 of standard construction, except as to the modification .in the mold, hereinafter described.

Bottom plates 7 move upwardly and downwardly around the stationary cores 5 by means of links 8 and cranks 9 of hollow actuating shaft 10, the bottom plates having the 1 usual supporting pedestals 11. The presser plates 6 are actuated by inner shaft 12, cranks 13, and

connections

14 and 15 supporting the vertically movable and laterally swinging cross head 16 for the plates as is generally understood.

Bottom plates 7 are connected at each side of the middle reciprocating wall or plate. 17

V by depending stirrups or yokes 18 which conmeet the inner edges of the bottom plates together so that they move up and down as one unit.

In general construction and operation, the machine is of usual standard construction, except that the partition plate 17 is movable instead of stationary, as in the usual double 5 5 block machine.

pressing and ejecting operations.

In my improved machine I mount the partition plate 17 so that it may be alternately moved back and forth during the molding, For such purpose the plate is mounted in guiding housings formed by end extensions 19 of the mold casing, and a shaft 20 extends centrally through the plate, having a guidesleeve 21 at one end. and an actuating terminal stem 22 at the other.

Said terminal is retracted by 'a spring 23 and is alternately pushed inwardly by a plunger 2% under the impelling action of a cam or eccentric 25. Said element, with suit able ball bearings and proper lubrication, is 7 mounted for rotation on shaft 26, extending from gear box 27 to hearing 28 for the outer end of the shaft and for plunger 24.

A motor 29 transmits movement through its shaft and worm or other suitable gearing in gear box 27 at the desired speed to operate shaft 26 and the eccentric. Such movement effects rapid alternating or reciprocatory motion to plate 17 during operation of the motor. The resulting etfect is to impart to the face of the block a trowelling or smoothing action by the vibration of the plate, tending to effect greater density of the aggregate by collecting the particles and effecting flow of the liquid in the same manner as is generally practiced in trowelling mortar.

The desired effect is accomplished by continuing the reciprocation of the partition plate during upward ejection of the blocksf so that upon arriving at the raised position they may be carried away on the usual pallets 30 for drying and storage.

In 3 I show a modified construction in which the casing 2 of the machine is designed for a single block manufacture, with the re ciprocating wall 17 substituted in place of the usual stationary side Wall of the mold. In such case the operation of the machine as to its various parts in the same, together with reciprocation of the movable side wall pro- 10o ducing the same densification of the block at such side.

Figs. 5 and 6 show a modified construction of the movable plate or partition 17 providing for application of an impregnating fluid to the adjacent face of a block or blocks. y

In such case the plate 17 is provided with a self-contained reservoir 31 having a covering top 32 and a supply conduit 33, and disl tributmg ports 34. Durmg reciprocation of 11 y the plate the liquid is applied to the face ofv the block in formation, as more fully described in a companion application filed November 16, 1926, Serial Number 148,677.

The construction and operation of the invention will be readily understood and appreciated from the foregoing description by all those familiar with this class of mechanism. Upon lowering of the usual bottom' plates 7 the pallets 30 are placed thereon after which the mold cavities are filled with aggregate preferably through a superimposed hopper, not shown.

During such filling operation the pressing plate 6 is thrown outwardly beyond the machine by its connectin arms 15, as in Fig. 1,

and the cavity is led with aggregate.

Thereupon the material may be tamped and then finally pressed by lowering the pressing plate, and the bottom plates 7 are then raised,

removing the finished block.

The partition plate 17 during such operation is actively reciprocated, so that the contacting faces of the blocks receive the desired smoothing and condensing treatment.

Due to the varying friction against plate 17, it is desirable to avoid a positive driving ing portions of the. block are of the usual rough porous consistency.

The advantages of the invention will be readily understood and appreciated by all those accustomed to the use of similar machinery,and greatly improves the making of concretblocks, either of the usual aggregate or any special mixture, as a cinders and ashes aggregate, like that of my prior Patent No. 1,212,840.

It will be understood that the invention is not limited to the exact construction shown, and may be changed or varied by the skilled mechanic, within the principle of operation disclosed.

.Having described my invention, what I claim is:

1. A block molding machine provided with a vertically arranged molding casing, a vertically movable bottom plate, a presser plate, a reciprocable side plate forming one confining Wall of the casing and provided with a spring retracted stem, and an actuating eccentric therefor. 7

2. A block molding machine of the class described provided with a casing having a plate housing at one side thereof, and a reciprocable plate forming a side wall in said housing.

8. i. block molding machine of the class described provided. witha casing having a plate housing at one side thereof, a reciprocable plate' forming a side wall in said housing, and means for actuating said plate.

4. In a block molding machine, the combination with the casing, of a reciprocable 'side wall having a reservoir and ports leading therefrom through one side.

In testimony whereof I hereunto afiix my signature.

. FRANois'J. STRAUB.