US1342208A - Mold for making building-tile - Google Patents

Description

L. H. DE FERNELMO N T. MOLDIFIOR-MAKING BUILDING TILE.

APPLICATION FILED MAY 8| 191B 4 Patented June 1, 1920.

UNITED STATES PATNT OFFICE.

MOLD FOR MAKING. BUILDING-TILE.

Specification of Letters Patent.

Patented June 1, 1920.

Application filed May 8, 1918. Serial No. 233,218.

[0 all whom it may concern:

hollow building tiles, more especially for the construction of partitions or walls for interior work, the form of the tile being such that it shall provide continuous ventilating apertures extending in parallel relation through the finished wall, and said apertures so formed as to break up the sound waves in such manner that the wall will become substantially sound-proof against the transmission of articulate speech, the said wall requiring only a relatively small thickness and thereby resulting in economy in material.

My invention has for a further object the construction of the mold of parts detach? ably assembled which enables the cores, which mold the hollow passages through the tile, to be withdrawn freely from the plaster material when set, and thereafter the separation of the rectangular frame on diagonally opposite corners to release the molded plaster.v

My invention consists of a rectangular frame formed of two right-angled frames detachably connected on diagonally opposite corners, one of said right-angled frames formed with a deep groove along its inner edges, and the other of said right-angled frames formed with ribs along its inner edges, said rectangular frame combined with a plurality of parallel cores extending through apertures formed in opposed grooved and ribbed walls of the two rightangled frames, said cores adapted to be withdrawn longitudinally without dismantling the rectangular frame. I

My invention further consists in having the aforesaid cores tapered and at the smaller end said taper abruptly reduced and continued in an extended portion of greatly less diameter, said reduced portion arranged adjacent to the grooved inner edge of the rectangular frame. v

My invention also comprehends details of construction, which, together with the tea tures above specified, are more fully de scribed hereinafter and particularly pointed out in the claims;

My invention will be better understood by references to the drawings, in which Figure 1 is a plan View of the mold in completed form ready for use; Fig. 2, is a section; thereof taken on line 22; Fig. 3 is a section thereof taken on line 33; Fig. 4 is an elevation of one of thecores removed; Fig. 5 is a perspective view of a portion of one of the right-angled frames which make up the rectangular frame; Fig. 6 is a vertical section through a portion of a wall composed of the hollow tiles molded by use of my improved mold, and Fig. 7" is a perspective view of one of the tiles which may be molded by my improved molding apparatus.

2 and 3 are opposite bars or sides of the mold, bar 2 being grooved as at 13 and'bar 3 being ribbed as at 10. Similarly, 4 and 5 are opposite bars or sides of the mold and are respectively grooved at 1.3 and ribbed at 10 as in the case of bars 2 and 3. The two grooved bars 2 and 4 are secured together at 7 to form a right-angled frame forming one-half of the mold frame proper;

and similarly, the two ribbed bars 3 and 5 are secured together at 6 to form a rightangled frame forming the other half of the mold frame proper. These two right-angled frames are then placed in contact to form a rectangular frame and the diagonally arranged corners are detachably clamped by screws 8 and 9, respectively. The free ends of the two rectangular frames are suitably shaped so that they snugly fit inpairs and when secured together by the screws 8 and 9, the frame is quite rigid.

The general cross section of bars 2 and 4 are the same and similarly the general cross section of bars 3 and 5 are the same; and the rib portions 10 are of a shape which would fit into the grooves 13 so that when they act tomold the plaster the abutting edges of adjacent tiles interengage as indicated in Fig. 6. The side walls 11 of the ribs 10 are oppositely inclined and similarly the side walls'14 of the grooves 13 areoppositely inclined and the flare or taper in the two cases is reversed so as to permit easy withdrawal of the mold parts from the plaster, as will be readily understood byreference to Fig. 3. The thicknessofthebars 2, 3, 4 and 5 is uniform so as toprovide an even thickness to the molded tile and the an upper guide surface for guiding the wiping tool in the act of molding the tile.

The opposite bars 2 and '3 are respectively provided with holes 19 and 20 for receiving the cores 16 which are employed to mold the parallel apertures 22 (Fig. 6) through thetile 21 formed by use of the mold. These cores 16 are tapered and made hollon for lightness, and at the smaller end of the core it is shouldered as at 18 and provided beyond the shoulder with the slightly tapered extension 17 of relatively small diameter. It will be understood that the grooved wall of the bar 2 is formed with small tapered apertures 19, whereas the ribbed portion of the opposite bar 3 is provided with large tapered'apertures 20. The cores fit through these apertures 19 and 20 very snugly, so asto make a clean molded tile. In the case of the large ends of the cores 16 they are preferably of a diameter which just equals the greatest width at the base of the rib 10, as will be understoodby reference to Figs. 2, 3 and 5, while in the case of the smallends of the cores 17 thereof are considerably less in diameter thanthe width of the groove, so as to permit a continuous rib of plaster to be molded as shown in Fig. 7 and furthermore, to provide shouldered apertures 27 in the tile to break up the sound vibrations, as more fully described hereinafter.

An important feature in the shape of the,

bars 2,. 3, 4 and 5, resides in the inclined 1 side flanges 12, which in the assembled mold,

provide undercut portions adapted to producebeveled shoulders 24 and 25 in the tile itself (Figs. 6 and 7). These beveled shoulders 24 and 25 in adjacent tiles, when assembled, provide-V shaped channels, which are subsequently filled with plaster as at 28, Fig. 6, to'form a smooth continuous wall. The tapered ribs 23 of one tile snugly fit the tapered or flaring groove 13 (Figs. 6 and 7) in the adjacent tile, so that the assembled tiles constituting the wall are firmly positioned. and interlocked by .reason of the shapes ofthe groovesand ribs formed by thermold.v

It will be observed that while the two 1"ightangled frames of the mold are held together by the clamping screws 8 and 9, the

tapered cores 16 may be avitlicli'zuvn from the molded plaster, the rectangular mold frame holding the plaster, against distortion or cracking during this operation. If the cores should bind they may be loosened by slight pressure on the ends 17 or by slight rotation and pulling on the large end. The cores may beslightly greased if so desired to facilitatetheir removal, but being-tapered from one end to the other, they may be readily withdrawn, once they are started.

After the Withdrawal ofthe cores and sufficient setting or hardening of the plaster, the clamping screws 8 and 9 maybe withdrawn and theright-angled frames released and separated from the edges of the molded tile. These frames being of right-angled construction are each in effect. V shaped in their contact with the bounding edges of the tile and hence readily removable without.

danger of injuring the plaster. It will be noted that every part of the mold which contacts with the plaster is tapered or beveled so as to be freely removable and hence a perfectmolded tile is possible. The factthat cores are independently removable from.

the rectangular frame is most important,

and this is further enhanced by reason of,

the fact that the several cores arealso independently removable, all of whichfacilitates i the liberation of the molded tile and hence reduces the danger of breakage-thereof.

As before stated, the shape of the tile V such that it is provided with a plurality of parallel apertures 22, choked at one end by the shouldered portions formed in therib 23 and through which the apertures are continued in small ,holes 27. The advantage of this resides in providingventilating apertures which provide dryness and atthe same.

time so shaping the apertures that they are bad conductors of sound by reason of. the:

shown in Figs. 6 and 7 is desirable between apartments and oflices.

I do notrestrict myself to any particular character of plaster material from which to mold thetiles, as any suitable material here. tofore in use may be employed, but the improved tile shall have its edges partly grooved and partly ribbed with flaring or inclined shoulders at each side of the grooves and ribs, and further providedwith a plu-.

rality of parallel tapered apertureshaving shouldered and contracted passages at one endwhere they extend into one ofthe ribbed edges. In this application I make no claim to the tile as an article of manufacturenor to the wall composed of such tiles, nor to the method. of forming the wall with the said tiles, as these form subject matter of a divisional application Serial Number,

293,599, filed April 80th, 1919.

It will now be apparent that I have devised a novel and useful construction which embodies the features of advantage enumerated as desirable, and while I have inthe,

present instance shown. anddescribed the:

preferred embodiment thereof which has been found in practice to give satisfactory and reliable results, it is to be understood that I do not restrict myself to the details, as the same are susceptible of modification in various particulars without departing from the spirit or scope of the invention.

Having now described my invention, what I claim as new and desire to secure by Letters Patent, is:

1. A mold for molding wall tiles, comprising two right-angled frames one of which has its inner face grooved and the other of which has its inner face ribbed and of the same general cross section as the grooves, and the bounding flanges on each side of the ribs and grooves made flaring in opposite directions, the flare of said flanges at each side of the mold being such that if continued they would intersect at substantially a common point, means for detachably clamping the two frames together to form a rectangular mold frame separable into two parts at diagonally opposite corners, and a plurality of tapered cores extending entirely across the mold frame, the large ends of the cores seated in the ribs of one of the right-angled frames and the small ends of the cores seated in the bottom of the groove of the other right-angled frame, said cores removable longitudinally without separating the mold frame.

2. A mold for molding wall tiles, comprising two right-angled frames one of which has its inner face grooved and the other of which has its inner face ribbed and of the same general cross section as the grooves, and the bounding flanges on each side of the ribs and grooves made flaring in opposite directions, the flare of said flanges at each side of the mold being such that if continued they would intersect at substantially a common point, means for detachably clamping the two frames together to form a rectangular mold frame separable into two parts at diagonally opposite corners, and a plurality of tapered cores extending entirely across the mold frame, the large ends of the cores seated in and extending through the ribs and bar of one of the right-angled frames and the small ends of the-cores provided with shoulders and extensions of still smaller diameter seated in and extending through the bottom of thegroove and bar of the otherrightangled frame, said cores throughout their 1 length being circular in cross section and adapted to be rotatable upon their axes and removable longitudinally without separating the mold frame.

3. A mold comprising a rectangularframe open at its top and bottom and formed of two right-angled frames detachably connected on diagonally opposite corners, one of said right-angled frames formed with a deep groove along its inner edges and the other of said right-angled frames formed with a rib along its inner edges, combined with a plurality of parallel tapered cores having straight axes and extending through apertures formed in opposed grooved and ribbed walls of the two right-angled frames,

said cores throughout their length being circular in cross section and adapted to be rotated while being withdrawn longitudinally without dismantling the rectangular frame;

4:. A mold comprising a rectangular frame open at its sides and detachably connected on its corners for easy separation and removal from the molded object in two right angled parts, one of said parts having bars formed with a deep groove with flaring walls terminating in flange portions also tapered with greater flare and the other-of said parts having bars formed with a rib with inclined walls and flange portions also inclined to flare in opposite directions, combined with a plurality of tapered cores having their large ends extending through the rib of one of the mold parts and its small end extending through the bar having the groove of the other mold part, the'said cores removable in the direction of their length without separating the two parts of the rectangular mold frame.

5. A removable core for a mold consisting of a long straight body of tapered form iaving solid smooth walls and also having its end of smaller diameter abruptly reduced in diameter by a bluntly tapered cone-like portion and continued in a short extension of relatively small diameter beyond the cone- Y like portion, and in which the core throughout its length is circular in cross section so that it may be rotated'within the molded mass when. being withdrawn.

In testimony of which invention, I hereunto set my hand.

LEONARD H. DE FERNELMONT,

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