US3457607A

US3457607A - Vibratory mold assembly

Info

Publication number: US3457607A
Application number: US603355A
Authority: US
Inventors: Jost Peikert
Original assignee: Peikert Bau AG
Current assignee: Peikert Bau AG
Priority date: 1965-12-20
Filing date: 1966-12-20
Publication date: 1969-07-29
Anticipated expiration: 1986-07-29
Also published as: CH430553A; FR1505243A

Description

July 29, 1969 J. PEIKERT 3,457,607

' VIBRATORY MOLD ASSEMBLY Filed Dec. 20, 1966 2 Sheets-Sheeti mVENTOH'. Josi Pkikefl BY MFWMW ATTORNEYS July 29, 1969 J. PEIKERT 3,457,607

VIBRATORY MOLD ASSEMBLY Filed Dec. 20, 1966 2 Sheets-Sheet 2 INVENTOR. 3 05% eiker c ATTORNEYS United States Patent VIBRATORY MOLD ASSEMBLY Jost Peikert, Zug, Switzerland, assiguor to Peikert Ban A.G., Zug, Switzerland Filed Dec. 20, 1966, Ser. No. 603,355 Claims priority, application Switzerland, Dec. 20, 1965, 17,614/65 Int. Cl. B28]: 1/08 US. CI. 25-41 6 Claims ABSTRACT OF THE DISCLOSURE A vibratory mold assembly having a plurality of vertically extending concrete slab molds defined by vertical walls supported by a plurality of beams defining base carriers, the walls carrying a small number of vibrator carriers each carrying a mechanical vibrator, the whole assembly being connected together rigidly for permitting a small number of vibrators to effectively vibrate all of the molds, the rigid connection being effected by tensioning devices connected between the base carriers and the vibrator carriers and producing a degree of tension which creates a rigid connection among all of the elements of the assembly.

BACKGROUND OF THE INVENTION The present invention relates to molds for concrete plates and particularly to an assembly constituting a battery of such molds.

Various types of mold assemblies have already been suggested for simultaneously molding a plurality of concrete plates, or slabs. Of the known types are those in which the entire assembly is mounted on a vibratory table which, due to the heavy weight of the mold assembly, must be sturdy and heavy and must be provided with a very powerful vibration generator. As a result, these devices are quite expensive to produce and costly to operate.

Other types of mold batteries employ a large number of vibrators, with at least several vibrators being associated with each mold. It will be appreciated that because a large number of vibrators must be provided, batteries of this type are expensive to produce and tend to require a great deal of repair and maintenance.

It is a primary object of the present invention to overcome these drawbacks.

A more specific object of the present invention is to effectively vibrate a large number of concrete molds by means of but a few vibrators.

Another object of the present invention is to provide a mold assembly, or battery, which is extremely rigid and hence capable of being satisfactorily vibrated by but a few vibrators.

Still another object of the present invention is to provide an arrangement which can be readily assembled and disassembled.

Yet another object of the present invention is to provide an arrangement whose degree of rigidity can be readily adjusted in a simple and rapid manner.

SUMMARY OF THE INVENTION These and other objects according to the present in vention are achieved by an improved battery of vibratory molds for manufacturing concrete slabs, which battry is of the type including a plurality of casing walls disposed parallel to one another and separated from one another by interspaces defining slab molds, and base carrier means Supporting the walls. According to the present invention, an improved assembly is obtained by providing two vibrator carriers disposed atop the walls and 3,457,607 Patented July 29, 1969 "ice extending transversely thereto, two vibrators each carried by a respective one of the vibrator carriers in the central region thereof, and bracing means connected between each end of each vibrator carrier and the base BRIEF DESCRIPTION OF THE DRAWINGS FIGURE 1 is a front elevational view of a vibratory battery arrangement according to the present invention.

FIGURE 2 is a schematic sectional view taken along the plane defined by the line IIII of FIGURE 1.

DESCRIPTION OF THE PREFERRED EMBODIMENT The illustrated vibratory mold battery according to the present invention includes base carrier means constituted by a plurality of supports, or base carriers, 1 which .are parallel to each other, these carriers 1 being supported on a foundation 3 by short elastic feet 2 made, for example, of rubber. The view of FIGURE 2 shows eleven casing walls 4 standing on the carriers 1, each wall 4 consisting of two parallel plates 6 connected together by U-beams 5. In order to simplify the illustration, the plates and beams are indicated only by heavy lines.

Horizontal angle beams 7 are connected between adjacent walls 4, at the lower parts thereof, these beams 7 serving as spacers between the walls and also for defining the lower limits of the mold interspaces 8 into which the concrete for forming the plates is to be poured. The walls 4 are also held apart by further spacers in the form of vertical angle beams (not shown) which also serve to define the lateral vertical limits of the interspaces 8. Small plates 9 extend into the upper extremities of the interspaces 8, these small plates being welded to the lower sides of two vibrator carriers in the form of thick I-beams 10, the small plates serving to maintain the beams 10 in their proper position with respect to the walls 4.

At each side of the resulting battery there are two or more vertical beams 11 which are connected to each other at their top and bottom by tie rods 12. In practice, these tie rods may be provided with threaded ends, and the beams provided with matching threaded bores, so that the rods can be readily disconnected from the beams 11 when desired.

Each of the two I-beam carriers 10 carries, at the midpoint of its upper flange, a vibrator 13 consisting of a rotary unbalance weight and an electric drive motor whose housing is rigidly connected with the carrier 10. The rigid connection between the motor housing and carrier 10 has the desirable effect of preventing a preferential vibration direction from being imparted to the carrier such .as would occur if the motor were mounted in another manner, e.g., through the intermediary of pendulum bearings.

Arranged near each end of each carrier 10 is a loop 14 of a steel cable which is held in place by suitable abutments 15 mounted on a respective end of the associated carrier 10. Further steel cable loops 17 run about the ends of the base carrier 1, which are directly below the ends of the carriers 10, the loops 17 being held in place by abutments 16 mounted on the lower surfaces of base carriers 1. The

loops

14 and 17 of each pair of opposing loops are connected to each other by way of bracing means in the form of a tensioning device 18 which includes two nuts 19 which are oppositely threaded and which are connected to the respective loops by shackles 20 and hooks 21. De-

3 vice 18 further includes a screw 22 having two opposing threads each of which engages a respective one of the nuts 19. The screw 22 carries an arm 23 by means of which the screw 22 can be turned.

The tensioning device 18 can be readily adjusted, by rotating arm 23, to connect rigidly the entire assembly constituting the vibrator mold battery. To achieve this result, it is important that the sides of plates 9 which abut against the walls 4 be slightly inclined by an amount which is not readily discernible in the drawing so that when the tensioning devices 18 are tensioned the plates 9 act as wedges which firmly press the opposite plates 6 of each wall 4 toward each other. The vibratory mold battery according to the present invention can be readily assembled and disassembled by means of a crane, and to facilitate handling of the parts by a crane, suitable suspension means are provided, in particular two eyes 24 on each of the carriers and two eyes 25 on each of the walls 4.

The liquid concrete to be molded is brought, in suitable containers, to the mold by means of a crane and may be poured directly into each mold 8 at the top thereof, and the resulting concrete plates or slabs, are ultimately removed also by a crane. To facilitate this removal, the plates may be reinforced and provided with iron loops or the like which project from the concrete and which allow the plates to be picked up by a crane.

The vibrator mold battery according to the present invention distinguishes itself favorably over heretofore known mold batteries mainly by the simplicity of the vibrating means, consisting of the

elements

13, 10, 14, 18, 17, 1, which require only two vibrators 13. By way of comparison, certain conventional vibratory batteries have their entire base, corresponding approximately to the carriers 1, built on a vibratory table which, due to the heavy weight of the battery, must be very sturdy and heavy and must be provided with a very powerful vibration source. As a result, these devices are quite expensive. In other heretofore known vibratory batteries, the vibrators are accommodated directly in the hollow casing walls 4, there being, for example eight vibrators in each wall. This means that in a battery for producing ten plates, eighty-eight vibrators are needed instead of two (eleven casing walls being required to define ten molds). The costs of such a vibratory battery are therefore very high to say nothing of the fact that the assembly and disassembly of the parts is substantially more complicated than is the case with the present invention. The same applies to conventional vibratory batteries in which each casing Wall is vibrated by means of vibrators which are attached to at least one of its ends.

Despite the simplicity of the vibratory means according to the present invention, experience has shown that the vibratory effect is more than satisfactory so that, insofar as quality and manufacturing speeds are concerned, the vibratory battery according to the present invention is in no way inferior to the prior art devices.

It will be understood that the above description of the present invention is susceptible to various modifications, changes, and adaptations and the same are intended to be comprehended within the meaning and range of equivalents of the appended claims.

I claim:

1. In a battery of vibratory molds for manufacturing large concrete slabs and including a plurality of casing walls disposed parallel to one another and separated from one another by interspaces defining slab molds, and base carrier means supporting said molds, the improvement comprising, in combination:

(a) two vibrator carriers disposed atop said walls and extending transversely thereto;

(b) two vibrators, one for each said carrier, each said vibrator being carried by its respective carrier and being disposed at the center of its respective carrier; and

(c) bracing means connected between each end of each said vibrator carrier and said base carrier means for bracing said vibrator carriers with respect to said base carrier means.

2. An arrangement as defined in claim 1 wherein said base carrier means comprises a plurality of base carriers extending parallel to said vibrator carriers; said arrangement further comprises a plurality of elastic feet supporting said base carriers; a respective one of said base carriers is disposed directly below each of said vibrator car riers; and said bracing means are connected between each end of said vibrator carriers and the corresponding ends of those of said base carriers which are disposed directly below said vibrator carriers.

3. An arrangement as defined in claim 2 wherein said bracing means comprise a plurality of tension applying units each associated with a respective end of one of said vibrator carriers and the corresponding end of its associated base carrier.

4. An arrangement as defined in claim 1 wherein each of said vibrators is disposed in a housing which is rigidly connected to its respective vibrator carrier.

5. An arrangement as defined in claim 1 wherein said bracing means hold said vibrator carriers, said casing walls, and said base carrier means together in rigid engagement.

6. In a battery of vibratory molds for manufacturing concrete slabs and including a plurality of casing walls disposed parallel to one another and separated from one another by interspaces defining slab molds, and base carrier means supporting said walls, the improvement comprising, in combination:

(b) two vibrators, one for each said carrier, each said vibrator being carried by its respective carrier and being disposed at the center of its respective carrier;

(c) bracing means connected between each end of each said vibrator carrier and said base carrier means for bracing said vibrator carriers with respect to said base carrier means, and

(d) wedge-shaped spacers mounted on the lower surfaces of said vibrator carriers, extending into the upper extremities of said interspaces, and bearing against said casing walls for applying a lateral pressure to said casing walls when said vibrator carriers are braced with respect to said base carrier means.

References Cited 2 UNITED STATES PATENTS I. SPENCER OVERHOLSER, Primary Examiner J. S. BROWN, Assistant Examiner US. Cl. X.R. 25954