US1427945A - Mold - Google Patents

Description

G. CUOZZO.

MOLD.

APPLICATION FILED MAR: 9. |921.

G. CUOZZO.

MOLD.

APPLICATION FILED MAR 9. 1921.

1,427,945. Patenasept. 5, 1922. SHEET 2.

2 SHEETS- GEORGE CUOZZO, OF BANGOR, MAINE.

MOLD.

Application led March 9, 1921. Serial No. 450,877.

To zZZ whom t may concern.'

Be it known that I, GEORGE CUozzo, a citizen of the United States, residing at angor, in the county of Penobscot and State of Maine, have invented certain new and useful Improvements in Molds, of which the following is a specification.

This invention is a mold for forming a reinforced concrete pipe upon which Letters Patent No. 1,413,008 were granted to me April 18, 1922. The object ofthe present invention is to provide a mold in which may be produced a pipe having the desired form and which will be of such a structure as to withstand the pressure exerted upon the walls thereof and which is adapted for the production of pipe sections of different lengths. The invention is illustrated in the accompanying drawings and will'be hereinafter fully set forth.

In the drawings- Figure 1 is a side elevation of a mold embodying my invention;

Fig. 2`is a vertical diametrical section of the same;

Fig. 3 is a top plan view;

Fig. 4 is a horizontal section taken on line 4`4 of Fig. 2;

Fig. 5 is an enlarged detail section taken on the line 55 4of Fig. 1;

F ig. 6 is an enlarged detail section particularly showing the means for preventing` spreading of the inner and outer walls of the mold at theirupper ends.

In carrying out my present invention7 I employ a pallet or base Vboard 1 which may be of any desired or suitable material and of any preferred dimensions. In the upper surface of the pallet or base board, I pro-- vide annular grooves which are adapted to receive the beads or flanges 2 on the under side of a plate 3 which is placed upon the upper surface of the pallet and is provided with an annular groove in the upper side of the inner bead or flange to be engaged by the lower end of the inner wall 4 of the mold. Around the inner wall 4, at the lower the ' end thereof, I place a former 5 which may consist of a single annular block or of a plurality of segmental blocks fitted together end to end about the wall. The former is constructed on its inner side with grojec` tions 6 which may be of any desired type and are adapted to pass through openings in the wall 4 and receive locking keys or wedges 7 whereby they will be retained in position. ris shown most clearly in Fig. 4, I prefer to construct the former in sections as 1t may be more easily fitted to the inner wall of the mold and theI meeting ends of adjoining, sections are preferably disposed obliquely, as shown at 8, whereby' a wedging action is obtained to hold the members of the former firmly together. At intervals upon the outer vide lugs 9 which will produce grooves in the inner surfaccvof 'the pipe and it will be readilyunderstood that the former 5 produces an annular recess in the end of the pipe. The wall 4 'is cylindrical and receives 70 the inwardly exerted pressure of the material fed into the mold to produce the pipe. To enable the wall to withstand such pressure and avoid collapse thereunder, I provide the braces 10 which are arranged at 75 any desired intervals in the height of the wall and are/each pivoted at one end, as shown at 11, to suitable lugsy or brackets 12 on the wall and at their opposite ends are provided with againstl the wall so that the wall will be very effectually braced.

I also place upon the pallet 1 an outer wall 14 which is obviously of greater diameter than the inner wall and is to be arranged concentric therewith. In practicing' the invention commercially, the Walls will be provided inl 4(piantities so that by selecting the proper walls a pipe of any desired thickness may be readily produced. The

outer wall 14 is constructed of sections of sheet metal prtwid'ed at their longitudinal edges with angle irons or bars 15 which are provided with openingsy through their outwardly projecting webs to receive locky ing keys 16, tapered pins 17 being driven through the said locking keys so as to bear ,against one angle iron or bracket and draw the head 1S of the engaged key against the outer face of the abutting web, as will ybe readily understood upon reference to Figs.

1 and 4. The several sections of the wall will thus be firmly fastened together and may be readily assembled. The construction also facilitates the removal of the Wall from around a formed pipe. The outer wall is provided at its lower end with a flared portion 19 from which a cylindrical portion 20 extends so as to encircle the former 5 in spaced relation thereto. tion 19 and the cylindrical end portion 2O produce an annular flange upon one end of surface of the former, I pro- 65 heads 13 adapted to bear 80 This flared porthe pipe section and the recess formed by the former 5 will be concentric with the said flange. One of the wall sections is constructed with a longitudinal offsetl which at one end bears upon the pallet l,but at its opposite end is short of the end of the mold. lThis ol'l'set 2l will produce a fiatfaced base or supporting rib on the finished pipe and, immediately adjacent the end of the said abutment, oifse'ts 22 are provided in the wall section which will produce small arallel ribs upon the completed pipe adapted to enter one of the grooves formed by the lugs 9 of the former Other offsets 23 are provided upon the outer wall inembers and these offsets are hollow so as to produce lugs upon the finished plastic pipe. Some of the offsets, it will be noted, have obliquely disposed walls and they will form upon the pipe lugs having obliquely disposed sides. The lugs with obliquely disposed sides on the finished pipe will enter recesses in the meeting end of an abutting pipe section and will leave spaces between the lugs and the sides of the recesses. After the pipe sections are fitted together, it is intended that grout or other plastic binder be poured into the joints so as to fill said spaces and form keys firmly binding the sections together and producing a fluid-tight joint. lf it be desired to produce a pipe of the maximum length possible in a given mold, ller blocks 2li are inserted in the offsets 23 below the extreme top of the outer wall so that the said offsets will be closed and a surface producedwhich is even and smooth from end to end of the mold. lf it be desired to produce a pipe of a length less than the full length of the mold, the filler blocks 24 are not employed and a pipe section will then be produced having lugs disposed upon its upper end but said upper end will be below the upper end of the mold. ln the accompanying' illustration, l have shown three sets of offsets 23 and obviously it will be possible by the use of the one mold to produce pipes of three different lengths.

`lVhen a pipe of a length less than the full length of the mold is to be produced, filler blocks are employed in the offset 2l so that the supporting rib or base produced upon the pipe section will terminate short of the end thereof and these filler blocks, shown at 25 in Fig. 5, are secured in position by screws 26 or similar fastenings inserted through the side walls of the offset 2l. These filler blocks are provided with grooves 27 in their inner edges so that the desired ribs will be formed upon the exterior of the pipe at the smaller end thereof.

To prevent spreading of the mold walls at their upper ends, l secure to the inner wall at intervals hinge plates 28 to which are hingedly connected keepers 29 adapted to extend across and rest upon the upper edges of the walls and lie at their outer ends upon brackets 30 secured rigidly upon the outer surface of the outer wall. Locking keys 3l are inserted through registering openings in the keepers and the said brackets so as to prevent accidental separation of the same and hold them in engagement so that the walls will be maintained in a fixed spaced relation and in parallelism.

The use of the mold is thought to be evident. The parts are assembled, as shown and described, and the cementitious or other plastic material is fed into the space between the walls of the mold and permitted to set. After the pipe has been thoroughly hardened, the keepers 29 are released and the outer wall sections separated and removed from around the pipe. Any convenient tool may then be inserted through the upper end of the mold to release the brace bars l0 and the inner wall will thus be loosened, permitting the formed pipe to be easily lifted from the pallet and the inner wall.

Having thus described the invention, what is claimed as new is:

l. n pipe mold comprising inner and outer walls, the outer wall being provided with hollow offsets, and fillers to lit within said offsets.

2. A pipe mold comprising a pallet, inner and outer walls resting upon the pallet in concentric relation, keepers hinged to the upper end of one of the walls and extending over the upper edges of both walls, and means carried by the other wall to restrain the said keepers.

3. A pipe mold comprising inner and outer walls, a sectional former disposed around the lower end of the inner walls, said sections having their meeting ends disposed obliquely, and lugs on some of said sections.

e. A pipe mold comprising inner and outer walls, a former disposed around the lower end of the inner wall, projections on the inner side of the former extending through the inner wall, and locking devices engaged with said projections at the inner side of the inner wall.

In testimony whereofl aiiix my signature.

enen-en oUoZZo. [L s j

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