UNITARY PAVER MOLD

Description

BACKGROUND OF THE INVENTION

[0001] The present invention relates to a mold for forming molded concrete products, and, more particularly, to a unitary mold for forming molded concrete products.

[0002] There are several problems that occur with prior art machines for forming concrete products which have previously been disclosed and addressed in earlier filed applications. A novel method and apparatus for forming concrete products was designed for the high speed manufacturing of a wide variety of high quality products was disclosed in U.S. Patent No. 5,395,228 to Aeseth et al., for Apparatus for Forming Concrete Products.
That invention increased vibration control in a concrete product forming machine, reduced the amount of time required to mold concrete products, increased the homogeneous consistency of concrete products, and reduced the amount of time required to exchange and align molds in a concrete product forming machine.

[0003] A novel self-aligning mold box assembly for use in a machine for forming concrete products, such as the machine disclosed in U.S. Patent No. 5,395,228 to Aeseth et al., is disclosed in my U.S. Patent No. 5,743,510, and which is directed to the mold box depicted in FIG. 1.

[0004] Another novel mold box assembly for use in a machine for forming concrete products, such as the machine disclosed in U.S. Patent No. 5,395,228 to Aeseth et aL, is disclosed in my U.S. Patent No. 5,542,837 for Method and Apparatus for Securing Partition Plates in a Mold .

[0005] While both the machine for forming concrete products disclosed in U.S. Patent No. 5,395,228 to Aeseth et al. and the two new mold box assemblies disclosed in my U.S. Patent No. 5,743,510 and my U.S. Patent No. 5,542,837 have substantial advantages over the prior art, each involves the use of mold box assemblies which in and of themselves impose limitations on product throughput, and which require labor-intensive assembly prior to use.

[0006] Turning now to Fig. 1A, included therein is an exploded view of a prior art paver grid assembly 100, which includes a paver grid 110 and a paver grid frame 112. In operative condition, paver grid 100 is secured to and contained within frame 112. The upper surfaces of the paver grid and frame are substantially coplanar when the grid and frame are in operative condition.

[0007] Paver grid frame 112 includes a pair of opposed mounting brackets 114, 116. Each of the mounting brackets has a pair of upwardly directed mounting surfaces, like surfaces 118, 120 on bracket 114. Each mounting surface 118, 120 includes a pair of bolt holes therethrough. Mounting bracket 116 includes mounting surfaces and bolt holes that are substantially symmetrical with mounting surfaces 118, 120 and the bolt holes therein.

[0008] A head assembly 122 is, in operative condition, mounted on a machine for making concrete products like that shown in Fig. 1B. The head assembly includes plurality of compression shoes, like shoe 124, which are aligned with corresponding cavities in paver grid 110, also mounted on the machine.

[0009] When the paver grid assembly 100 and head assembly 122 are mounted on the machine, wet concrete product is poured into the cavities in paver grid 110. After wet product is poured into the paver grid, the machine moves head assembly downwardly and the shoes, like shoes 124, compress the product into the paver grid cavities. After sufficient compression, a pallet 126 lowers concurrently with head assembly 122 thus stripping the molded pavers from the grid and leaving them arranged on the pallet as shown in Fig. 1A.

[0010] Turning now to Fig. 1B, indicated generally at 128 is a machine for molding concrete blocks and pavers. Included therein are four blocks, like block 130, arranged on pallet 126. In the view of Fig. 1B, the mold that formed blocks 130 has been removed from the machine. Part of the mounting structure for that mold, as well as for paver grid assembly 100, however, is visible. The visible portion of the mounting structure comprises a die support 131. A pair of bolt heads can be seen extending downwardly from die support 131. Before mounting paver grid assembly 100 on machine 128, the bolts are removed and mounting surface 120 (Fig. 1A) is urged against the lower surface of die support 131. Each of the other mounting surfaces on paver grid assembly 100 are urged against corresponding die supports (not visible). The bolts visible in Fig. 1B are thereafter used to bolt each of the mounting surfaces firmly against the underside of the die support thereby securing paver grid assembly on machine 128.

[0011] The mold box is vibrated by a pair of opposed vertical vibrating rods 132, 133. Another die support (not visible) is located adjacent rod 133. As can be see in Fig. 1A, a semicircular notch between mounting surfaces 118, 120 is formed to accommodate vibrating rod 132. Vibrating rod 133 is similarly accommodated by corresponding structure (not visible) on mounting bracket 116.

[0012] The vibrating rods, like rod 132, vibrate the mold while the shoes, like shoe 124, compact wet concrete product into the cavities. The vibration during compaction increases density, and therefore strength, of the molded concrete product.

[0013] Mold boxes (as shown, for example, in early document US 2,856,668) are still used because heretofore, molds have been limited to the equivalent of three 406.4mm ("16 inch blocks") per mold. The maximum of three "sixteens" per mold has long been recognized as the practical upper limit to the size of a mold which can withstand the high-speed, low-displacement vibration applied to the mold to compact the green concrete once in the mold. In order to increase the "per cycle" throughput of concrete product molding machines, apparatus and methods have been developed in which multiple individual 3 - 203.2mm x 203.2mm x 406.4mm (8"x8"x16") molds are inserted into a single "mold box", which in turn is mounted on the forming machine as described generally in the reference discussed above. While notable advances have been realized in "mold box" technology, the mounting of multiple molds in mold boxes nonetheless represents a significant limitation in the production of formed concrete products.

[0014] FR-A-2 649 139 discloses a unitary mold for the manufacture of cast concrete items.

SUMMARY OF THE INVENTION

[0015] Accordingly, it is a general object of the present invention to provide an apparatus which obviates the need to assemble provide a mold box for supporting multiple molds as part of a mold assembly.

[0016] It is a further object of the present invention to provide a unitary mold for the forming of cast concrete products which includes a greater number of product-shaping voids than individual prior art molds, while still providing adequate support for the green concrete during compaction without the need for an external, peripheral frame.

[0017] It is yet a further object of the invention to provide a unitary mold that retains the advantages associated with using multiple molds inserted into and supported by an external mold box.

[0018] These and other objects and advantages are accomplished by providing a mold as defined in claim 1. In preferred embodiments a unitary mold is provided defining a plurality of cavities for receiving cement which in number exceed that heretofore achievable, and which does not require a mold box for support. The unitary mold of the embodiments of the present invention includes upper and lower surfaces, opposed side and end portions, and internal surfaces which define a plurality of concrete-receiving voids. In preferred embodiments mounting spacers are mounted on the lower surface of the unitary mold adjacent each end. The mounting spacers include precisely positioned holds for receiving locating pins to precisely locate the unitary mold on a support surface. Also mounted on the bottom surface adjacent each side are mounted longitudinal support rails. The longitudinal support rails, in conjunction with the side portions of the limit the vertical deflection when the unitary mold is vibrated to compact the wet concrete. Thus, it can be appreciated that my novel apparatus disclosed above can be used as an alternative to smaller-sized molds inserted into external mold boxes in any concrete product forming machine having a larger mold box support frame.

[0019] The foregoing and other objects, features and advantages of the invention will become more readily apparent from the following detailed description of a preferred embodiment that proceeds with reference to the drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 

Fig. 1 is an exploded perspective view of a prior art mold box assembly.

Fig. 1A is an exploded perspective view of a prior art head assembly, paver grid assembly, and pallet.

Fig. 1B is a front elevation view of a prior art machine that can incorporate the structure depicted in Fig. 1A to make pavers.

Fig. 2 is a top plan view of the unitary mold according to the present invention.

Fig. 2A is an end view of the unitary mold shown in FIG. 2.

Fig. 3 is a side view of the unitary mold shown in FIG. 2.

Fig. 3A is a bottom plan view of the unitary mold shown in FIG. 2.

Fig. 4 is a top plan view of the central mold grid which is incorporated in the embodiment shown in FIG. 2.

FIG. 4A is an end view of the central mold grid shown in FIG. 4.

FIG. 5 is a side view of the central mold grid shown in FIG. 4.

FIG. 5A is a bottom plan view of the central mold grid shown in FIG. 4.

FIG. 6 is a partial enlarged bottom plan view of the central mold grid shown in FIG. 4 showing in greater detail a typical mold opening.

FIG. 7 is a top plan view of a cover plate used to cover the peripheral voids formed in the central mold grid of FIG. 4.

FIG. 8 is a side view of the longitudinal support member shown in FIG. 3A.

FIG. 9 is a top view of the longitudinal support member shown in FIG. 8.

FIG. 10 is a bottom plan view of a mounting spacer which is mounted on the bottom surface adjacent each end of the unitary mold shown in FIG. 2

FIG. 11 is a side view of the mounting spacer shown in FIG. 10.

FIG. 12 is a top plan view of the pan angle that is mounted on the unitary paver mold shown in FIG. 2.

FIG. 13 is a side view of the pan angle shown in FIG. 12.

FIG. 14 is a top plan view of the pallet guide that is mounted on the unitary paver mold shown in FIG. 2.

FIG. 15 is an end view of the pallet guide shown in FIG. 14.

FIG. 16 is a perspective view of a concrete molding machine of the type on which a unitary mold shown in FIG. 2 is mounted.

FIG. 17 is a perspective view of the concrete molding machine shown in FIG. 16 with the unitary mold of FIG. 2 mounted thereon.

Fig. 18 is an exploded perspective view of a head assembly, a paver grid (being another embodiment of the present invention), and pallet.

Figs. 19, 20 and 21 are side, plan and left-end views of another paver grid embodiment of the invention.

Fig. 22 is a perspective view of the paver grid of Figs. 19-21.

Fig. 23 is a view similar to Fig. 22 depicting hidden structure and dashed lines.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0021] Turning now to Figs. 2-6, indicated generally at 10 in Fig. 2 is a unitary paver mold incorporating the present invention. Unitary paver mold 10 includes a mold grid member shown generally at 12 which includes a central mold grid 13 disposed within sides 14 and 16, and ends 18 and 20. Mold grid 13 defines multiple openings 21 which are shaped to form concrete to the desired shape, and which are open on the top and bottom (FIG. 6). Openings 15 are formed in mold grid member 12 to equalize the thermal mass distribution across the span of the mold grid member. Equalization of the thermal mass promotes even heating and cooling of the member during heat treating, and results in less distortion of the member during heating and cooling. Each opening 15 is covered by a plate 17 as shown in FIG. 7, and which is welded into place on the top surface of the mold grid member 12. Mounted on the upper surface of the mold grid member 12 are pan angles 19 and 25 which serve to contain wet concrete in the mold grid member.

[0022] Turning additionally to FIGS. 8 and 9, unitary paver mold 10 includes longitudinal support rails 22 and 24 (22 only shown) which are mounted with bolts 26 to the bottom surfaces of sides 14 and 16 respectfully, and which are parallel to and positioned outside of the lateral edges of mold grid 12. Support rails 22 and 24 in the preferred embodiment are 127mm (5") tall and serve to limit deflection of the mold grid member as described more fully below.

[0023] Turning to FIGS. 10 - 17, a mounting spacer 28 is mounted on the lower surface of the mold grid 12, and serves to precisely space the unitary paver grid 10 above a supporting platen 30 in the molding machine 32 as shown in FIGS. 16 and 17. Once installed in the molding machine, a unitary paver mold according to the present invention is filled with wet concrete, the wet concrete is compacted by a pneumatically activated press 34 as shown in FIG. 14. To aid in the compaction of the wet concrete, the filled mold assembly is vibrated at a relatively high frequency, e.g. 50 hz., and a displacement of from 1.27 to 2.54mm (0.050 to 0.100"). Doing so naturally exerts high bending moments in the mold. In the past, attempts at providing a mold larger in size than the equivalent of 3 - 203.2mm x 203.2mm x 406.4mm (8"x8"x16") blocks have not been successful because such molds, when subjected to vibratory compaction at the levels discussed above, have exhibited excessive vertical bending around the longitudinal mid-point of the mold. It is applicant's experience that vertical bending displacements at the midpoint of the mold which are greater than about 0.254mm (0.010") result in unacceptably poor quality in the resulting molded products and increased wear on the cavity surface. Applicant's invention provides, for the first time, a unitary mold which has a capacity of greater than the equivalent of 3 -203.2mm x 203.2mm x 406.4mm (8"x8"x16") blocks, which exhibits acceptably low bending displacement during vibratory compaction of the wet concrete, and which is readily easily used with existing molding machine designs. In the preferred embodiment, a paver mold as shown in Figs. 2-3A, when vibrated at 50 hz. and a displacement of 2.286mm (0.090") exhibited vertical bending at its longitudinal midpoint of approximately 0.2159mm (0.0085"), which is well within the acceptable maximum of 0.254mm (0.010").

[0024] In Fig. 18, head assembly 122 and pallet 126 are substantially identical to those described in Fig. 1A and retain corresponding identifying numerals in Fig. 18. Paver grid 134 is constructed in accordance with the present invention and includes a substantially planar grid plate 136 in which a plurality of cavities are formed for molding concrete pavers, like those shown on pallet 126. A pair of stiffener rails 138, 140 are bolted to the underside of grid plate 136 as shown. Each end of grid plate 136 includes a mounting plate, like mounting plate 142, bolted thereto via bolts (not shown) received in four bores, like bore 144, in grid plate 136.

[0025] In Figs. 19-23 another embodiment of the paver grid depicted in Fig. 18 is shown. As can be seen, it includes larger cavities, and therefore a fewer number of cavities, for molding larger concrete products than the paver grid in Fig. 18. Numerals corresponding to those used in Fig. 18, however, are used in Figs. 19-23 to identify similar structure.

[0026] Each mounting plate includes a pair of upwardly directed mounting surfaces, like surfaces 146, 148 on mounting plate 142. Mounting plate 142 is received in a recess 150 formed on the underside of grid plate 136, as best view in Fig. 21. Plate 142 is secured to grid assembly 136 via four bolts (not shown) received through countersunk bores, like bore 144, in grid plate 136, and coaxial bores (visible in dashed lines in Fig. 23) in the mounting plate. Rails 138,140 are likewise bolted to the underside of grid plate 136.

[0027] In operation, mounting surfaces 146,148 are urged against the underside of the die supports, like die support 131, on machine 128 and are thereafter bolted in the same fashion as the prior art paver grid assembly of Fig. 1A. Molding a product thereafter proceeds as previously described, and as is well known in the art. Stiffener rails 138, 140 prevent excessive flexing of paver grid 136 during the manufacturing process. Paver grid assembly 134 is cheaper to make than the prior art paver grid of Fig. 1A because it has fewer parts. In addition, the sides of the grid need not be machined to fit in a frame as in the prior art. Only the undersurfaces to which the rails and mounting plates are bolted need be machined to permit securing parts together.

[0028] While a preferred construction for, and methods of practicing the invention have been disclosed herein, it is appreciated that variations and modifications may take place without departing from the scope of the invention as defined by the following claims.

Claims

1. A concrete product-forming mold (10) comprising:

a unitary body (12) having a peripheral edge defined by laterally separated side edges and longitudinally separated end edges; and

an array of cavities (21) formed in the unitary body; characterised in that

a pair of stiffener rails (22, 24) are formed or mounted longitudinally along the unitary body and secured to a lower surface of the unitary body.

2. A concrete product-forming mold (10) according to claim 1 comprising:

a unitary body (12) having opposed longitudinal side walls, opposed end walls, and a central portion defining an array of product-forming cavities, the central portion having a longitudinal midpoint;

the array of product-forming cavities (21) including at least four cavities in the longitudinal dimension.

3. A concrete product-forming mold (10) according to claim 2 wherein the longitudinal midpoint has a bending deflection of not more than 0.254 mm (0.010 inches) responsive to the mold being vibrated at approximately 50 Hz and 2.286 mm (0.090") displacement.

4. A concrete producing-forming mold (10) according to any of the preceding claims wherein the longitudinal rails (22, 24) are laterally offset from the array of cavities.

5. A concrete product-forming mold (10) according to any of the preceding claims, wherein:

the array of cavities (21) is formed through the unitary body and passes from an upper surface of the unitary body to a lower surface; and

the pair of stiffener rails (22, 24) is secured to the lower surface of the unitary body (12) outside of the array of cavities and adjacent the side edges so that a pallet can be moved into position against an underside of the cavities to strip out concrete products formed within the cavities and forced out during a stripping process.

6. A concrete product-forming mold (10) according to any of the preceding claims, further including a plurality of supplemental openings (15) formed through the unitary body adjacent the side edges and outside the array of cavities to equalize a thermal mass distribution across a lateral extent of the unitary body during heating and cooling.

7. A concrete product-forming mold (10) according to claim 6 wherein at least one of the stiffener rails (22, 24) is mounted on the lower surface of the unitary body (12) over the supplemental openings (15).

8. A concrete product-forming mold (10) according to claim 5 or any claim dependent thereon, further including a pair of pan angles (19, 25) mounted on the upper surface of the unitary body (12) adjacent the end edges and outside of the array of cavities (21) which serve to contain wet concrete as it is poured into the array of cavities.

9. A concrete product-forming mold (10) according to claim 5 or any claim dependent thereon, further including a mounting spacer (28) secured to an extending below the lower surface of the unitary body (12) adjacent the end edges so that the mold (10) can be precisely spaced above a supporting platen on a concrete products forming machine during concrete products manufacturing.

10. A concrete product-forming mold (10) according to any of the preceding claims, further including a mounting plate (142) secured adjacent each end edge and having a pair of upwardly directed mounting surfaces (146, 148).

11. A concrete product-forming mold (10) according to claim 10, further including a recess (150) formed in the lower surface of the unitary body adjacent each end edge, said mounting plate (142) being secured within the recess.

Ansprüche

1. Gussform (10) für Betonprodukte, aufweisend:

einen einheitlichen Körper (12) mit einer Umfangskante, die durch seitlich getrennte Seitenkanten und longitudinal getrennte Endkanten begrenzt ist; und

eine Anordnung von Hohlräumen (21), die in dem einheitlichen Körper ausgebildet sind; dadurch gekennzeichnet, dass

ein Paar Versteifungsschienen (22, 24) longitudinal entlang dem einheitlichen Körper ausgebildet oder angebracht und an einer unteren Oberfläche des einheitlichen Körpers befestigt sind.

2. Gussform (10) für Betonprodukte nach Anspruch 1, aufweisend:

einen einheitlichen Körper (12) mit gegenüberliegenden longitudinalen Seitenwänden, gegenüberliegenden Endwänden und einem zentralen Abschnitt, der eine Anordnung an produktformenden Hohlräumen begrenzt, wobei der zentrale Abschnitt einen longitudinalen Mittelpunkt aufweist;

   wobei die Anordnung an produktformenden Hohlräumen (21) mindestens vier Hohlräume in Longitudinalabmessung beinhaltet.

3. Gussform (10) für ein Betonprodukt nach Anspruch 2, wobei der longitudinale Mittelpunkt eine Biegeablenkung von nicht mehr als 0,254 mm (0,010 Zoll) als Reaktion auf eine Vibration der Gussform bei etwa 50 Hz und einer Verschiebung von 2,286 mm (0,090 Zoll) aufweist.

4. Gussform (10) für Betonprodukte nach einem der vorstehenden Ansprüche, wobei die longitudinalen Schienen (22, 24) gegenüber der Anordnung an Hohlräumen versetzt sind.

5. Gussform (10) für Betonprodukte nach einem der vorstehenden Ansprüche, wobei:

die Anordnung an Hohlräumen (21) durch den einheitlichen Körper hindurch ausgebildet ist und von der oberen Oberfläche des einheitlichen Körpers zur unteren Oberfläche verläuft; und

das Paar Versteifungsschienen (22, 24) an der unteren Oberfläche des einheitlichen Körpers (12) außerhalb der Anordnung an Hohlräumen und angrenzend an die Seitenkanten befestigt ist, so dass eine Palette in eine Position gegen die Unterseite der Hohlräume gebracht werden kann, um Betonprodukte, die innerhalb der Hohlräume erzeugt wurden und während eines Ablöseprozesses herausgedrückt wurden, abzuziehen.

6. Gussform (10) für Betonprodukte nach einem der vorstehenden Ansprüche aufweisend eine Anzahl zusätzliche Öffnungen (15), die durch den einheitlichen Körper hindurch benachbart den Seitenkanten und außerhalb der Anordnung an Hohlräumen ausgebildet sind, um eine thermische Massenverteilung über der seitlichen Ausdehnung des einheitlichen Körpers während des Erwärmens und Abkühlens auszugleichen.

7. Gussform (10) für Betonprodukte nach Anspruch 6, wobei mindestens eine der Versteifungsschienen (22, 24) auf der unteren Oberfläche des einheitlichen Körpers (12) über den zusätzlichen Öffnungen (15) angebracht ist.

8. Gussform (10) für Betonprodukte nach Anspruch 5 oder einem darauf rückbezogenen Anspruch, aufweisend ein Paar Schwenkangeln (19, 25), die auf der oberen Oberfläche des einheitlichen Körpers (12) benachbart den Endkanten und außerhalb der Anordnung an Hohlräumen (21) angebracht sind und dazu dienen, nassen Beton zu enthalten, wenn er in die Anordnung an Hohlräumen gegossen wird.

9. Gussform (10) für Betonprodukte nach Anspruch 5 oder einem darauf rückgezogenen Anspruch, aufweisend ein Montage-Distanzstück (28), das auf einem Fortsatz unterhalb der oberen Oberfläche des einheitlichen Körpers (12) benachbart den Endkanten befestigt ist, so dass die Gussform (10) während der Herstellung der Betonprodukte präzise über einer Halteplatte auf einer Maschine zur Herstellung von Betonprodukten beabstandet werden kann.

10. Gussform (10) für Betonprodukte nach einem der vorstehenden Ansprüche, aufweisend eine Montageplatte (142), die gegen jede Endkante gesichert ist und ein Paar nach oben gerichtete Montageoberflächen (146, 148) aufweist.

11. Gussform (10) für Betonprodukte nach Anspruch 10, aufweisend eine Ausnehmung (150), die auf der unteren Oberfläche des einheitlichen Körpers benachbart jeder Endkante ausgebildet ist, wobei die Montageplatte (142) innerhalb der Ausnehmung befestigt ist.

Revendications

1. Moule (10) pour former des produits en béton comprenant :

un corps unitaire (12) ayant un bord périphérique défini par des bords de côté latéralement séparés et des bords d'extrémité longitudinalement séparés, et

un ensemble de cavités (21 ) formées dans le corps unitaire,

   caractérisé en ce que
   une paire de rails de renfort (22, 24) sont formés ou montés longitudinalement le long du corps unitaire et fixé à une surface inférieure du corps unitaire.

2. Moule (10) pour former des produits en béton selon la revendication 1, comprenant :

un corps unitaire (12) ayant des parois de côté longitudinales opposées, des parois d'extrémité opposées et une partie centrale définissant un ensemble de cavités pour former des produits, la partie centrale ayant un point central longitudinal,

l'ensemble de cavités (21) pour former des produits comprenant au moins quatre cavités dans le sens longitudinal.

3. Moule (10) pour former des produits en béton selon la revendication 2, dans lequel le point central longitudinal a une flèche par pliage qui ne dépasse pas 0,254 mm (0,010 pouce) en réaction au fait que le moule est soumis à des vibrations à approximativement 50 Hz et de 2,286 mm (0,090 ") de déplacement.

4. Moule (10) pour former des produits en béton selon une quelconque des revendications précédentes, dans lequel les rails longitudinaux (22, 24) sont décalés latéralement par rapport à l'ensemble de cavités.

5. Moule (10) pour former des produits en béton selon une quelconque des revendications précédentes, dans lequel :

l'ensemble de cavités (21) est formé dans le corps unitaire et passe d'une surface supérieure du corps unitaire à une surface inférieure, et

la paire de rails de renfort (22, 24) est fixée à la surface inférieure du corps unitaire (12) en dehors de l'ensemble de cavités et de manière adjacente aux bords de côté afin qu'une palette puisse être mue en position contre un dessous des cavités pour démouler les produits en béton formés dans les cavités et obligés de sortir pendant un processus de démoulage.

6. Moule (10) pour former des produits en béton selon une quelconque des revendications précédentes, comprenant en outre une pluralité d'ouvertures supplémentaires (15) formées dans le corps unitaire de manière adjacente aux bords de côté et en dehors de l'ensemble de cavités pour égaliser une distribution de masse thermique sur une étendue latérale du corps unitaire pendant le chauffage et le refroidissement.

7. Moule (10) pour former des produits en béton selon la revendication 6, dans lequel au moins un des rails de renfort (22, 24) est monté sur la surface inférieure du corps unitaire (12) au-dessus des ouvertures supplémentaires (15).

8. Moule (10) pour former des produits en béton selon la revendication 5 ou un quelconque des revendications dépendantes de celle-ci, comprenant en outre une paire d'équerres (19, 25) montées sur la surface supérieure du corps unitaire (12) de manière adjacente aux bords de côté et en dehors de l'ensemble de cavités (21) qui servent à contenir le béton mouillé quand il est versé dans l'ensemble de cavités.

9. Moule (10) pour former des produits en béton selon la revendication 5 ou un quelconque des revendications dépendantes de celle-ci, comprenant un écarteur de montage (28) fixé à la surface inférieure du corps unitaire (12) et s'étendant sous celle-ci de manière adjacente aux bords d'extrémité afin que le moule (10) puisse être espacé précisément au-dessus d'un plateau de soutien sur une machine formant des produits en béton pendant la fabrication des produits en béton.

10. Moule (10) pour former des produits en béton selon une quelconque des revendications précédentes, comprenant en outre une plaque de montage (142) fixée de manière adjacente à chaque bord d'extrémité et ayant une paire de surfaces de montage (146, 148) dirigées vers le haut.

11. Moule (10) pour former des produits en béton selon la revendication 10, comprenant en outre un évidement (150) formé dans la surface inférieure du corps unitaire de manière adjacente à chaque bord d'extrémité, ladite plaque de montage (142) étant fixée à l'intérieur de l'évidement.

Drawing