US680273A

US680273A - Mold.

Info

Publication number: US680273A
Application number: US1539300A
Authority: US
Inventors: William Sink Parker
Original assignee: Individual
Current assignee: Individual
Priority date: 1900-05-03
Filing date: 1900-05-03
Publication date: 1901-08-13
Anticipated expiration: 1918-08-13

Description

No. 680,273. Patentq Aug. 13, um

W. S. PARKER.

MOLD.

(Application filed May 3. 1900.;

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No. 680,273. Patented Aug. I3, l90l. w. s. PARKER.

MOLD.

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UNITED STATES PATENT OFFICE.

WILLIAM SINK PARKER, OF AUSTIN, TEXAS.

MOLD.

SPECIFICATION forming part of Letters Patent N0. 680,273, dated August 13, 1901.

Application filed May 3, 1900. $erial No. 15,393. (No model.)

To (til whom it may concern:

Be it known that LWILLIAM SINK PARKER, a citizen of the United States, residing at Austin, in the county of Travis and State of Texas, have invented certain new and useful Improvements in Molds, of which the following is a specification.

My present invention relates to a novel mold intended more particularly for the molding of conduits of various forms in plastic ma terial or material which during the operation of molding is in a plastic or viscous state and which after being molded is designed to be hardened either while in the mold or after its removal therefrom.

One object of the invention is to produce a mold comprising a plurality of separable sectional members which may be employed as component parts of molds for certain purposes or as complete molds for the casting of conduits,having the configuration of asection of the conduit designed to be cast by the mold in its complete or more extended embodiment.

A further object of the invention is to so construct the mold members that they maybe readily Withdrawn from the surface of the casting Without danger of injury to the surface of the latter.

A further object is to provide efficient means for connecting the members, and the most important object is to provide means for expanding the sectional members of the inner shell of the mold and for permitting its contraction when it is desired to remove the mold from contact with the cast.

To the accomplishment of these several ob-, jects and others subordinate thereto, as will hereinafter more fully appear, my invention consists, essentially, in constructing a mold comprising inner and outer concentric shells, each comprehending a plurality of separable members, each of which latter comprise a plurality of hingedly connected relatively movable sections, suitable means for connecting the members in a manner to permit their ready separation being provided. The invention consists, further, in the em ployment of joint or key sections removably located between the opposing edges of the sectional members of the inner shell of the mold and connected by actuating mechanism, by means of which they are urged in opposite directions to properly expand the inner shell and which permits of their retraction and removal to permit the disassociation of the inner shell from the casting, all as will hereinafter more fully appear.

In the accompanying drawings, Figure 1 is an end elevation or top plan view of my mold organized for the casting of a hollow conduit or pipe and showing in dotted lines the retracted positions of the joint members and the mold-sections deflected upon their hinges to release the cast. Fig. 2 is a diametrical sectional view on the line 2 2 of Fig. 1. Fig. 3 is a side elevation of the mold complete. Fig. 4 is an end elevation, partly in section, of one of the mold members organized for employment as a complete mold. Fig. 5 is a sectional view on the line 5 5 of Fig. 4. Fig. 6 is a detail view of a reversible foundation or base plate. Fig. 7 is a detail View of the end gate, and Fig. 8 is a detail view of one of the foot-plate sections.

Referring to the numerals of reference iu= dicating corresponding parts in the several views, 1 indicates a base or foundation plate of any desired size or material, upon which my mold is designed to rest during the operation of molding. The mold comprehends concentric inner and

outer shells

2 and 3 of any desired cross-sectional contour-as, for instance, cylindrical, polygonal, Ate-but shown in the accompanying drawings as oylindrical for the purpose of defining their essential characteristics. These shells may be 'made from any suitable matcrialas, for instance, wood or metalbut are preferably 7 wood, having reinforcing surfaces or linings of thin sheet metal, the lining on the inner face of the outer shell being designated by the numeral 4 and that on the opposed outer face of the inner shell 2 being designated by the numeral 5. The outer shell is composed of two separable members 6 and 7, preferably of corresponding contour, and the inner shell 2 is likewise composed of two separable members 8 and 9, thecontiguous members of the shells comprehending a member of the mold. Inasmuch as mold members constructed as thus far described might in some instances be effectively employed, I will proceed at once with a description of the means which I employ for connecting the mold leave joint-spaces 11 and 12 intermediate of the contiguous edges of the shell for the reception of interposed joint or

key members

13 and 14, preferably wedge-shaped, as shown, longitudinally coextensive with the inner shell and of a width corresponding to the thickness of the shell, so that when in place the joint or key members will completely fill the spaces between the edges of the shell members and Will have their inner and outer faces located 'flush with the inner and. outer faces of the shell. At suitable points upon the inner faces of the keys or

members

13 and 14 are located inwardly-extending lugs or

ears

15 and 16, to which are pivotally connected the outer ends of links 17 and 18, whose contiguous inner ends are likewise pivotally connected to what may be termed a key-rod or actuator 19, located axially within the inner shell and provided at its upper end with a handle or grip 20, and having its lower end extended into proximity to the face of the base-plate 1 for the purpose of limiting the downward movement of the key-rod 19 in a manner to prevent the projection of the members or keys beyond the outer face of the inner shell and into the mold-chamber. The links 17 and 18 and the intermediate key-rod 19 constitute, in efiect, a toggle, designed, as the key-rod is urged up or down, to release the

keys

13 and 14 or to cause them to be wedged firmly between the opposed edges of the inner shell for the purpose of urging the shell members to their proper relative positions to constitute a core.

The separable members 6 and 7 of the outer shell or mold proper are retained by

lockingbolts

21 and 22, terminally pivoted, respectively, between horizontalsparallel bearingears 23, extending from the outer face of the member 6, for instance, adjacent to its edges. Any number of these bolts may be employed at the sides of the mold, according to the length of the latter; but for the purpose of illustration I have shown only one bolt at each side. The locking-bolts are designed to be swung into recesses 24, formed in the locking-lugs 25, which extend from the outer sur-' connection of the edges may be made more complete by providing one member with a longitudinal tongue 29, extending from its face and engaging a correspondingly-shaped groove in the opposed edge face.

The mold constructed as described comprehends a complete embodiment of my invention in its broadest aspect, since it comprises a mold composed of separable members, and means for retaining them in proper relation to constitute a complete mold and core defining an intermediate mold-space or cast-chamber for the reception of the plastic or other material from which the cast is to be made; but, as premised, I have made pro- .vision for efiecting the removal of the memface of the latter.

In the illustrated embodimentof the invention I form the members 6 and 7 of the outer shell in two sections, 31 and 32 designating the sections of the member and 6 33 and 34 the sections of the member 7, the contiguous edges of the sections of each member being connected by one or more hinges 35, located beyond or outside of the shell. The particu lar manner of mounting the hinges 35 is not essential, provided they permit the shell-sections to be swung back in opposite directions and limit their movement inwardly to such an extent as will produce the contour desired for the mold.

36 indicates ametal strap or band encircling the outer shell and divided at the edges of the members and sections and secured in any suitable manner, the object of this band being to stifien the sections of the shell and prevent warping or other distortion when wood "or other similar material is employed in. the

manufacture of the mold. Handles 37 may be extended from the band 36 upon each section for the purpose of facilitating the removal of the mold from the cast, and, as shown, the locking-lugs 25 maybe formed integral to this band adjacent to the opposite edges of the member 7. The inner shell or core 2 is likewise constructed in sections, the members 8 and 9 of said core each being composed of two

sections

38 and 39 and 40 and 41, the section of each member being connected by hinges 42, located-adjacent tothe inner periphery of the core orinner shell and designed to permit the sections of the members to be swung inwardly away from the inner face of the cast. Attention is here called to the fact that the

hinges

35 and 42 are oppositely disposed-that is to say, they are exterior and tion to the end face of the pipe or conduit cast in the mold. Each section of the footplate is supported upon legs 44, and the inner and outer shells of the mold are provided at the-lower edges of their contiguous faces with oppositely-extending foot-plate flanges 45,- which extend under the opposite edges of the foot-plate and serve to retain the shells in contact with the foundation or base plate when the plastic or viscous materialis being poured into the mold-chamber 10. If preferred, however, the foot-plates 43 may be made contin uous instead of sectional, and in some instances it may be desirable to form them integral with or otherwise fixed to the foundation or base plate, a variation of this latter arrangement being shown in Fig. 6 of the drawings, wherein I have shown a reversible baseplate provided upon its opposite faces with foot-plates or end mold-plates of difierent di mensions and designed for use in connection with molds of diiferent forms, one of said foot-plates being designed for use in connection with the complete cylindrical mold shown in Fig. 1 and the foot-plate on the opposite side of the foundation being designed for use in connection with a culvert, to form which I employ only one of the mold members hereinbefore described.

In Fig. 4 of the drawings I have shown one of the mold members employed as a complete mold, the open longitudinal edges of the mold-space, which in this case is semioylindrical, being closed by an end gate 46,clamped against the diametrical face of the member by means of the locking-bolts 22, received within terminal recesses 47 in the end plates and drawn up by the jam-nuts 27, which in this organization of parts bear against the outer face of the end gate. The inner face of the end gate is grooved, as indicated at 48, opposite the edges of the outer shell for the reception of the tongues 29, extending there from, and where the cast is designed as a section of a transversely-continuous conduit the end gate is provided opposite the mold-chamber 10 with recesses or projections or such other contours as is necessary to impart the required shape to the edges of the cast for the purpose of facilitating the interfitting of two conduit-sections with break-joints at their over a keeper 50 at the] middle of the inner face of the end gate and likewise hooked at their opposite diverging ends into keepers 51, extending from the inner faces of the innershell-member sections. The spaces at the opposite longitudinal edges of the inner shell member constituting one-half of the transverse dimension of the joint members or keys l3 and 14 are filled by means of wedge-shaped longitudinal plug-strips 52, inserted between the members of the end gate and the edge faces of the inner shell member, said wedge-shaped strips serving also to urge the edges of the inner shell member into position.

In operation a mold organized and arranged as shown is filled with concrete or other material in a plastic state, which completely fills the mold-chamber 10, receiving the contigu; ii l,"

ration of such chamber and having its end formed in the desired manner by the footplate or end mold 43. The plastic material is then allowed to harden until it becomes a cast. When the proper time has arrived, the operator by pulling upwardly on the handle 20 of the key-rod 19 causes the keys or

joint members

13 and 14 to be urged inwardly toward the center of the core and out of contact with the opposed longitudinal edges of the inner shell members 6 and 7. The keys and their connected actuating mechanism may then be entirely removed by drawing them endwise out of the cast, after which the sections of the members may be swung inwardly away from the inner face of the cast, and after the separation has been completely effected the inner shell members may be likewise withdrawn from the interior of the cast without liability of injury to the surface of the latter, it being observed that the inward movement of the member-sections withdraws the flanges 44 from beneath the inner edges of the foot-plates. The mold-core or inner shell having been entirely removed, it only remains to release the locking-bolts 22 byunscrewing the nuts 27 and swinging them out of engagement with the locking-lugs. The operator now completes the disorganization of the mold by grasping the handles 37 and swinging the sections of the outer shell members away from the outer face of the cast, simultaneously withdrawing the flanges 44 from beneath the outer edge of the foot-plate. The complete cast is then lifted from the footplate, and the mold is ready for reorganization and a repetition of the operation just described. It may be mentioned in passing, however, that when the mold is being organized the expansion of the joint members or

keys

13 and 14 between the contiguous edges of the inner shell members is effected by urging the key-rod 19 downwardly, the togglekey-aetuating device serving to wedge the keys between the members to urge the latter into their proper positions and to retain them rigidly in place. When a single member is to be employed as a complete mold, the oper ation of molding is carried out substantially IIO plete mold; but while the present embodiment of my invention is at this time deemed preferable I do not desire to limit myself to the structural details defined, but reserve the right to effect such changes, modifications,

and variations as may come properly within the scope of the protection prayed, as it is obvious that the mold might be constructed in various forms to produce conduits or other articles of the desired contour and that the movable sections of the several members might be variously proportioned and arranged to accommodate the removal of the mold from the cast in accordance with the peculiarities of the contour of the latter.

What I claim is- 1. A mold comprising inner and outer shell members each composed of hinged sections, means for drawing the edges of the outer member into position, and means for urgingthe inner member into position.

2. A mold comprising an outer shell member composed of eXteriorly-hinged sections,- an inner shell member composed of interiorlyhinged sections, means for drawing the edges of the outer member into position, and means for urging the inner shell into position.

3. A mold comprising inner and outer shells, the inner shell being composed of members each comprising hinged sections, and means for urging apart the members of the inner shell.

t. A mold comprising inner and outer shells, the inner shell being composed of a plurality of members each comprisingv interiorly-hinged sections, joint members interposed between the opposed edges of the inner shell members, and means for urging the joint members in opposite directions to exes'qa're pand the inner shell or to permit its contraction.

5. A mold comprising separable members each composed of an outer shell having exteriorly-hinged sections, and an inner shell having interiorlyhinged sections, means for drawing the outer shell members together, and means for urging the inner shell members apart.

6. A mold comprising separable members each composed of an outer shell having exteriorly-hinged sections, and an inner shell having interiorlyhinged sections, means for drawing the outer shells of the members together, joint members intermediate of the opposed edges of the inner shells of the members, and means forurging the joint members in opposite directions to expand the inner shell or topermit its contraction.

7. .A mold comprising separable members each composed of an outer shell having exteriorly-hinged sections, and an inner shell having interiorly-hinged sections, locking-bolts pivotally connected to the outer shell of one section, recessed locking-lugs projecting from the outer shell of the contiguous member and designed to receive the locking-bolts, jamnuts carried by said bolts,wedge-shaped joint members intermediate of the contiguous edges of the inner shells of the contiguous members, a longitudinally-movable key-rod,- and links pivotally connected at their oppo site ends to thekey-rod and joint members.

8. A mold comprising a base=plat-e, inner and outer flanged shells, and an intermediate foot-plate extending over the flanges of the shells;

9. A reversible base-plate for molds provided with foot-plates on its opposite faces.

10. A mold comprising inner. and outer shell members, each composed of hinged sections, means for drawing one of said members into position, and means for urging the other member into position.

In testimony that I claim the foregoing as my own I have hereto affixed my signature in the presence of two witnesses.

WILLIAM SINK PARKER.

Witnesses:

J. BoULDIN REoToR, W. F. MOGEHEE'.