US3237268A - Casting device for pressure casting concrete and the like - Google Patents

Casting device for pressure casting concrete and the like Download PDF

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US3237268A
US3237268A US383279A US38327964A US3237268A US 3237268 A US3237268 A US 3237268A US 383279 A US383279 A US 383279A US 38327964 A US38327964 A US 38327964A US 3237268 A US3237268 A US 3237268A
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mold
end members
top plate
pressure
members
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US383279A
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De Witt E Yates
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B28—WORKING CEMENT, CLAY, OR STONE
    • B28B—SHAPING CLAY OR OTHER CERAMIC COMPOSITIONS; SHAPING SLAG; SHAPING MIXTURES CONTAINING CEMENTITIOUS MATERIAL, e.g. PLASTER
    • B28B7/00—Moulds; Cores; Mandrels
    • B28B7/0097—Press moulds; Press-mould and press-ram assemblies

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  • This invention relates to a casting device for the pressure casting of concrete, plastic and similar masses particularly concrete building blocks, patio tile, silo staves and the like.
  • Still another object of this invention is to provide a pres sure casting device having means for simultaneously opening the sides and ends of the device with uniform, controlled movement, initially a shearing movement, to permit immediate removal of the piece without edge deformation.
  • a further object is to provide a pressure casting device in which the mold is precisely and rigidly locked by the downward movement of the press ram.
  • FIGURE 1 is a side view, partly in section, of the casting device with the mold in its locked position.
  • FIGURE 2 is a top plan view of the casting device with the press ram removed to reveal operating details of the mold in both the closed and open position.
  • FIGURE 3 is an end view of the casting device with the press ram in an elevated position.
  • the mold bottom plate 1 is supported on a base 2.
  • Mold side members 3 and mold end members 4 are movably mounted on said bottom plate by means of link pivot pins 5, link arms 6, and wrist pins 7 to permit arcuate movement of said members without change of orientation about the wrist pin axis.
  • Link arms 6 freely rotate about link pivot pins and are extended into the side and end members through suitable slots formed in said members, the slots being sized to permit lateral movement of the link arms.
  • At least one wrist pin associated with each mold side and each mold end member is journalled in said bottom plate and is affixed at its upper extension to the corresponding link arm and at its lower extension to a control arm 8, coupling the link arm and the control arm for simultaneous movement as a single unit.
  • a connecting rod 9 joins each control arm to an actuating lever 10 pivotally mounted between the mold bottom plate and the base.
  • rotation of the actuating lever about its axis produces simultaneous arcuate movement of all mold side members and mold end members at a rate determined by the motion of the actuating lever.
  • the actuating lever may be extended outside of the mold through a suitable slot in the base and serve as an actuating handle 11 for operation by manual or other means, e.g. hydraulic cylinder.
  • the actuating lever may also be made to operate 3,237,268 Patented Mar. 1, 1966 from the underside of the base by affixing the actuating lever to a rotatable shaft 12 journalled in the base and extending therethrough for external control.
  • Other variations for effecting rotational movement of the actuating lever about its axis can, of course, be made to adapt the device to the type of control desired.
  • the mold top plate 13 is mounted onto the pressure plate 14 to which the pressure ram 15 is bolted.
  • On each side of the pressure plate is afiixed at least one, preferably two, mold clamps 16, the mold clamps extending outwardly and downwardly of said mold top plate, the lowermost portion being preferably beveled outwardly at its inner face 17.
  • Each mold clamp preferably carries in its body a vertical hold down plunger 18 which is downwardly biased by spring 19.
  • a stop member 20 on the upper extremity of the hold down plunger limits its downward travel.
  • Both the face of the mold top plate and face of the mold bottom plate p eferably are formed with thin, closely spaced drain grooves 21 therein opening into lateral drain channels (not shown) to assist the removal of water from the mold.
  • Various spacers may be inserted between the base and the mold bottom plate to assist in distributing the pressure more uniformly, provided such spacers are not located so as to interfere with the movement of the connecting rods, control arms, and actuating
  • the mold clamps having locked the side and end members into position
  • the hold down plungers contact the upper surfaces of the side and end members to position them tightly against the mold bottom during the remaining downward movement of the mold top plate.
  • Further downward travel of the pressure ram brings the mold top plate into contact with the casting material as it moves snugly into the chamber formed by the side and end members, forcing water out of the chamber through the drain grooves and channels.
  • the downward movement of the pressure ram automatically and sequentially (1) locks the side and end members in position, (2) seals the side and end members to the mold bottom plate and (3) pressurally applies the mold top plate to the casting material to compact the material with removal of water, entrapped air, etc.
  • the pressure ram is returned upwardly to release the pressure and retract the hold down plungers and mold clamps.
  • the actuating lever is then moved (in a clockwise direction as viewed in FIGURE 2) to the open position, simultaneously removing the side and end members from the molded piece by arcuate movement without change of orientation, each member moving initially in shear to break the adhesion between the molded piece and the mold forming surfaces of the members and to prevent damage to the surfaces and corners of the molded piece.
  • the actuating lever is returned to its closed position to reassemble the side and end members for another cycle.
  • the entire operation can be fully automated by programming the movements of the pressure ram and the control rodactuating lever in a suitable time cycle and providing means for charging the mold chamber and removing the molded piece.
  • a pressure casting device which comprises (1) a mold bottom plate, (2) movable side and end members disposed thereon and pivotally attached thereto by linkage means permitting arcuate movement of each of said members between an assembled mold-forming position and a disassembled mold-releasing position without change of member orientation, (3) actuating means connected to each of said linkage means to effect simultaneously said arcuate movement of all side and end members in a controlled manner, (4) a mold top plate of a configuration fitted snugly within said side and end members in assembled mold-forming position, and (5) mold clamping means in fixed relation to said mold top plate and being movable therewith, said mold clamping means extending outwardly and downwardly therefrom, the lowermost portions thereof being below said mold top plate, to engage and lock said side and end members together in assembled mold-forming position.
  • a pressure casting device which comprises 1) a mold bottom plate, (2) movable side and end members disposed thereon and pivotally attached thereto by linkage means permitting arcuate movement of each of said members between an assembled mold-forming position and a disassembled mold-releasing position without change of member orientation, (3) a single actuating means connected to each of said linkage means to effect simultaneously said arcuate movement of all side and end members, (4) a mold top plate of a configuration fitting snugly within said side and end members in assembled moldforming position, (5) a support plate for said mold top plate, (6) mold clamps in fixed relation to said support plate and extending outwardly and downwardly therefrom, the lowermost portions thereof being below said mold top plate, to engage and lock said side and end members together in assembled mold-forming position, and (7) pressural means for changing the relative separation of said mold top plate and said mold bottom plate.
  • a pressure casting device which comprises (1) a mold bottom plate, (2) movable side and end members disposed thereon and pivotally attached thereto by linkage means permitting arcuate movement of each of said members between an assembled mold-forming position and a disassembled mold-releasing position without change of member orientation, (3) a single actuating lever pivotally disposed under said mold bottom plate and connected to each of said linkage means to effect simultaneously said arcuate movement of all side and end members, (4) a mold top plate of a configuration fitting snugly within said side and end members in assembled mold-forming position, (5) a support plate for said mold top plate, (6) mold clamps associated with said support plate and extending downwardly and outwardly therefrom, the lowermost portions thereof being below said mold top plate, to engage and lock said side and end members together in asssembled mold-forming position, and (7) drainage means in said mold bottom plate and said mold top plate to permit removal of fluids and gases from said mold.
  • a pressure casting device which comprises (1) a mold bottom plate, (2) movable side and end members disposed thereon and pivotally attached thereto by linkage means permitt-ing arcuate movement of each of said members between an assembled mold-forming position and a disassembled mold-releasing position without change of member orientation, (3) actuating means connected to each of said linkage means to effect simultaneously said arcuate movement of all side and end members, (4) a mold top plate of a configuration fitting snugly within said side and end members in assembled moldforming position, (5) mold clamps associated with and extending outwardly and downwardly of said mold top plate, the lowermost portions thereof being below said mold top plate, to engage and lock said side and end members together in assembled mold-forming position, and (6) means associated with said mold clamps to hold said side and end members against said mold bottom plate when locked in assembled mold-forming position.

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  • Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Chemical & Material Sciences (AREA)
  • Ceramic Engineering (AREA)
  • Mechanical Engineering (AREA)
  • Moulds, Cores, Or Mandrels (AREA)

Description

March 1, 1966 D. YATES 3,237,268 7 CASTING DEVICE FOR PRESSURE CASTING CONCRETE AND THE LIKE Filed July 17, 1964 M ME/via)? DEW/7'7 E. YATES 5y 47'70PNEK United States Patent 3,237,268 CASTING DEVICE FOR PRESSURE CASTING CONCRETE AND THE LIKE De Witt E. Yates, Rte. 4, Box 105, Chippewa Falls, Wis. Filed July 17, 1964, Ser. No. 383,279 6 Claims. (Cl. 25-41) This invention relates to a casting device for the pressure casting of concrete, plastic and similar masses particularly concrete building blocks, patio tile, silo staves and the like.
Although a variety of devices have been designed for pressure casting concrete shapes, a relatively simple, positive acting mold permitting mass production without sacrificing unit quality has been desired. When freshly mixed concrete is subjected to high compression with provision for removal of water, it quickly hardens into a plastic mass of suificient solidity to permit rapid removal from the mold. However, deformation of the plastic mass can occur unless the piece is carefully removed, particularly if the piece has sharp edges.
Accordingly, it is an object of this invention to provide a simple and efficient pressure casting device providing mass production capability without edge deformation of the molded block.
Still another object of this invention is to provide a pres sure casting device having means for simultaneously opening the sides and ends of the device with uniform, controlled movement, initially a shearing movement, to permit immediate removal of the piece without edge deformation.
A further object is to provide a pressure casting device in which the mold is precisely and rigidly locked by the downward movement of the press ram.
Still other objects and advantages will be apparent from the following description.
In the drawings similar reference numerals indicate like parts in the several figures.
FIGURE 1 is a side view, partly in section, of the casting device with the mold in its locked position.
FIGURE 2 is a top plan view of the casting device with the press ram removed to reveal operating details of the mold in both the closed and open position.
FIGURE 3 is an end view of the casting device with the press ram in an elevated position.
Referring to the figures, the mold bottom plate 1 is supported on a base 2. Mold side members 3 and mold end members 4 are movably mounted on said bottom plate by means of link pivot pins 5, link arms 6, and wrist pins 7 to permit arcuate movement of said members without change of orientation about the wrist pin axis. Link arms 6 freely rotate about link pivot pins and are extended into the side and end members through suitable slots formed in said members, the slots being sized to permit lateral movement of the link arms. At least one wrist pin associated with each mold side and each mold end member is journalled in said bottom plate and is affixed at its upper extension to the corresponding link arm and at its lower extension to a control arm 8, coupling the link arm and the control arm for simultaneous movement as a single unit. A connecting rod 9 joins each control arm to an actuating lever 10 pivotally mounted between the mold bottom plate and the base. Through the described linkages rotation of the actuating lever about its axis produces simultaneous arcuate movement of all mold side members and mold end members at a rate determined by the motion of the actuating lever. The actuating lever may be extended outside of the mold through a suitable slot in the base and serve as an actuating handle 11 for operation by manual or other means, e.g. hydraulic cylinder. The actuating lever may also be made to operate 3,237,268 Patented Mar. 1, 1966 from the underside of the base by affixing the actuating lever to a rotatable shaft 12 journalled in the base and extending therethrough for external control. Other variations for effecting rotational movement of the actuating lever about its axis can, of course, be made to adapt the device to the type of control desired.
The mold top plate 13 is mounted onto the pressure plate 14 to which the pressure ram 15 is bolted. On each side of the pressure plate is afiixed at least one, preferably two, mold clamps 16, the mold clamps extending outwardly and downwardly of said mold top plate, the lowermost portion being preferably beveled outwardly at its inner face 17. Each mold clamp preferably carries in its body a vertical hold down plunger 18 which is downwardly biased by spring 19. A stop member 20 on the upper extremity of the hold down plunger limits its downward travel. Both the face of the mold top plate and face of the mold bottom plate p eferably are formed with thin, closely spaced drain grooves 21 therein opening into lateral drain channels (not shown) to assist the removal of water from the mold. Various spacers may be inserted between the base and the mold bottom plate to assist in distributing the pressure more uniformly, provided such spacers are not located so as to interfere with the movement of the connecting rods, control arms, and actuating lever.
In the use of the casting device of this invention counterclockwise movement of the actuating handle 11 (as viewed in FIGURE 2) either manually or automatically in a predetermined time cycle, rotates the actuating lever to assemble both side members 3 and both end members 4 on the mold bottom to form an open topped chamber having the desired block configuration. A measured amount of concrete or other casting material is then placed in the chamber and the pressure ram is lowered, eg by hydraulic means. As the ram lowers, the beveled inner faces of the mold clamps first engage the outer surfaces of the side and end members, locking them firmly in closed, mold forming position. As the mold top plate is lowered further, the mold clamps having locked the side and end members into position, the hold down plungers contact the upper surfaces of the side and end members to position them tightly against the mold bottom during the remaining downward movement of the mold top plate. Further downward travel of the pressure ram brings the mold top plate into contact with the casting material as it moves snugly into the chamber formed by the side and end members, forcing water out of the chamber through the drain grooves and channels. Thus, the downward movement of the pressure ram automatically and sequentially (1) locks the side and end members in position, (2) seals the side and end members to the mold bottom plate and (3) pressurally applies the mold top plate to the casting material to compact the material with removal of water, entrapped air, etc.
Once the maximum desired pressure has been achieved the pressure ram is returned upwardly to release the pressure and retract the hold down plungers and mold clamps. The actuating lever is then moved (in a clockwise direction as viewed in FIGURE 2) to the open position, simultaneously removing the side and end members from the molded piece by arcuate movement without change of orientation, each member moving initially in shear to break the adhesion between the molded piece and the mold forming surfaces of the members and to prevent damage to the surfaces and corners of the molded piece. After the molded piece is removed the actuating lever is returned to its closed position to reassemble the side and end members for another cycle. As will be appreciated, the entire operation can be fully automated by programming the movements of the pressure ram and the control rodactuating lever in a suitable time cycle and providing means for charging the mold chamber and removing the molded piece.
Various modifications and alterations of the above described device will be apparent to those skilled in the art without departing from the invention.
I claim:
1. A pressure casting device which comprises (1) a mold bottom plate, (2) movable side and end members disposed thereon and pivotally attached thereto by linkage means permitting arcuate movement of each of said members between an assembled mold-forming position and a disassembled mold-releasing position without change of member orientation, (3) actuating means connected to each of said linkage means to effect simultaneously said arcuate movement of all side and end members in a controlled manner, (4) a mold top plate of a configuration fitted snugly within said side and end members in assembled mold-forming position, and (5) mold clamping means in fixed relation to said mold top plate and being movable therewith, said mold clamping means extending outwardly and downwardly therefrom, the lowermost portions thereof being below said mold top plate, to engage and lock said side and end members together in assembled mold-forming position.
2. The pressure casting device of claim 1 in which the lowermost portions of said mold clamps which engage said side and end members are beveled outwardly to urge said side and end members gradually and simultaneously into assembled mold-forming position.
3. A pressure casting device which comprises 1) a mold bottom plate, (2) movable side and end members disposed thereon and pivotally attached thereto by linkage means permitting arcuate movement of each of said members between an assembled mold-forming position and a disassembled mold-releasing position without change of member orientation, (3) a single actuating means connected to each of said linkage means to effect simultaneously said arcuate movement of all side and end members, (4) a mold top plate of a configuration fitting snugly within said side and end members in assembled moldforming position, (5) a support plate for said mold top plate, (6) mold clamps in fixed relation to said support plate and extending outwardly and downwardly therefrom, the lowermost portions thereof being below said mold top plate, to engage and lock said side and end members together in assembled mold-forming position, and (7) pressural means for changing the relative separation of said mold top plate and said mold bottom plate.
4. A pressure casting device which comprises (1) a mold bottom plate, (2) movable side and end members disposed thereon and pivotally attached thereto by linkage means permitting arcuate movement of each of said members between an assembled mold-forming position and a disassembled mold-releasing position without change of member orientation, (3) a single actuating lever pivotally disposed under said mold bottom plate and connected to each of said linkage means to effect simultaneously said arcuate movement of all side and end members, (4) a mold top plate of a configuration fitting snugly within said side and end members in assembled mold-forming position, (5) a support plate for said mold top plate, (6) mold clamps associated with said support plate and extending downwardly and outwardly therefrom, the lowermost portions thereof being below said mold top plate, to engage and lock said side and end members together in asssembled mold-forming position, and (7) drainage means in said mold bottom plate and said mold top plate to permit removal of fluids and gases from said mold.
5. A pressure casting device which comprises (1) a mold bottom plate, (2) movable side and end members disposed thereon and pivotally attached thereto by linkage means permitt-ing arcuate movement of each of said members between an assembled mold-forming position and a disassembled mold-releasing position without change of member orientation, (3) actuating means connected to each of said linkage means to effect simultaneously said arcuate movement of all side and end members, (4) a mold top plate of a configuration fitting snugly within said side and end members in assembled moldforming position, (5) mold clamps associated with and extending outwardly and downwardly of said mold top plate, the lowermost portions thereof being below said mold top plate, to engage and lock said side and end members together in assembled mold-forming position, and (6) means associated with said mold clamps to hold said side and end members against said mold bottom plate when locked in assembled mold-forming position.
6. The pressure casting device of claim 5 in which said means associated with said mold clamps to hold said side and end members against said mold bottom plate when locked in assembled mold-forming position comprises downwardly biased plungers mounted in said mold clamps.
References Cited by the Examiner FOREIGN PATENTS 532,107 11/1921 France. 732,287 6/1955 Great Britain. 766,748 1/ 1957 Great Britain. 561,768 4/ 1957 Italy.
I. SPENCER OVERHOLSER, Primary Examiner,
G. A. KAP, Assistant Examiner.

Claims (1)

1. A PRESSURE CASTING DEVICE WHICH COMPRISES (1) A MOLD BOTTOM PLATE (2) MOVABLE SIDE AND END MEMBERS DISPOSED THEREON AND PIVOTALLY ATTACHED THERETO BY LINKAGE MEANS PERMITTING ARCUATE MOVEMENT OF EACH OF SAID MEMBERS BETWEEN AN ASSEMBLED MOLD-FORMING POSITION AND A DISASSEMBLED MOLD-RELEASING POSITION WITHOUT CHANGE OF MEMBER ORIENTATION, (3) ACTUATING MEANS CONNECTED TO EACH OF SAID LINKAGE MEANS TO EFFECT SIMULTANEOUSLY SAID ARCUATE MOVEMENT OF ALL SIDE AND END MEMBERS IN A CONTROLLED MANNER, (4) A MOLD TOP PLATE OF A CONFIGURATION FITTED SNUGLY WITHIN SAID SIDE AND END MEMBERS IN ASSEMBLED MOLD-FORMING POSITION, AND (5) MOLD CLAMPING MEANS IN FIXED RELATION TO SAID MOLD TOP PLATE AND BEING
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3730657A (en) * 1969-11-25 1973-05-01 Nat Res Dev Mold assembly for pressing concrete
US3765819A (en) * 1971-07-23 1973-10-16 Dewston Ltd Clamping arrangements for use with moulds

Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US532107A (en) * 1895-01-08 Car- bolster
GB732287A (en) * 1952-04-12 1955-06-22 Giuseppe Olmo Spa Improved manufacture of articles made of spongy or cellular rubber
GB766748A (en) * 1955-01-11 1957-01-23 Lingl Hans Improvements in or relating to automatic moulding presses

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US532107A (en) * 1895-01-08 Car- bolster
GB732287A (en) * 1952-04-12 1955-06-22 Giuseppe Olmo Spa Improved manufacture of articles made of spongy or cellular rubber
GB766748A (en) * 1955-01-11 1957-01-23 Lingl Hans Improvements in or relating to automatic moulding presses

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3730657A (en) * 1969-11-25 1973-05-01 Nat Res Dev Mold assembly for pressing concrete
US3765819A (en) * 1971-07-23 1973-10-16 Dewston Ltd Clamping arrangements for use with moulds

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