Patent Application
20180290331
The present invention generally relates to molds for creating structures, and more particularly, to re-usable molds for creating retaining wall blocks for retaining walls.
Retaining wall blocks are commonly made from concrete or rebar reinforced concrete. A re-usable metal mold is designed to make the blocks and defines their shape, size, and outer geometry. The mold typically has one or more doors at its top and one or more holes at its top for injecting mixed concrete to cure, or harden, over time. Once the mold is designed and fabricated and is in use, rebar is often positioned in the mold, and the mold is filled with concrete. The concrete is permitted to cure, or harden. Once the concrete is cured, which can take many hours, the doors of the mold are opened, and the retaining wall block is removed, oftentimes with a crane due to its heavy weight. The curing time for a retaining wall block is dependent upon the shape, size, and outer geometry, and sometimes it can be a very long length of time, for example, a 24 hour period, which undesirably reduces throughout.
The present disclosure provides various embodiments of a retaining block mold and method for making retaining wall blocks. The mold enables the blocks to be made more quickly than in previous designs by enabling separation of each block from the mold housing when the block is not completely cured but is cured sufficiently enough to enable separation. Once separated, the block can be permitted to fully cure away from the mold housing, while the mold housing is re-used to produce one or more other blocks.
One embodiment, among others, is a mold for making a retaining wall block. The mold has a movable bottom tray and a mold housing. The mold housing has a plurality of sides, an open bottom, and at least one door in one of the sides. The open bottom has the movable bottom tray installed or situated therein to close the bottom of the mold housing. The at least one door is shaped and of sufficient size to define an opening to enable the retaining wall block to be moved through when opened. The at least one door is designed to close the one side of the housing when closed. The mold housing has an internal cavity therein that defines an outer shape of the retaining wall block. The mold housing has an opening designed to receive and introduce fabrication material (e.g., rebar and concrete) into the cavity.
Another embodiment, among others, is a method for manufacturing retaining wall blocks by using the mold defined in the previous paragraph. This method can be broadly summarized as follows: (a) introducing the fabrication material into the cavity of the mold housing; (b) permitting the fabrication material to cure to a sufficient extent to enable withdrawal of a first retaining wall block from the mold housing; (c) separating the bottom tray in combination with the first retaining wall block from the mold housing by opening the doors and moving the combination out of the doors through the one side of the mold housing; (d) moving a second bottom tray into the mold housing and repeating steps (a) through (c) in order to create a second retaining wall block, while the first retaining wall block fully cures separately from the mold housing to an extent to when the first retaining wall block can be lifted by itself without damage.
Another embodiment, among others, is a mold for making retaining wall blocks. The mold has a means for supporting at a bottom of the mold the retaining wall block. The mold as a means for housing and defining, in combination with the supporting means, a cavity, which defines an outer surface of the retaining wall block. The housing means also has a means for introducing fluidized fabrication material into the cavity. Finally, the mold has a means for enabling movement of the retaining wall block, once sufficiently cured, in combination with the support means, from a side of the housing means to separate the combination from the housing means.
Another embodiment, among others, is a method for manufacturing retaining wall blocks by using the mold defined in the previous paragraph. This method can be broadly summarized as follows: (a) introducing the fabrication material into the cavity of the housing means; (b) permitting the fabrication material to cure to a sufficient extent to enable withdrawal of a first retaining wall block from the housing means; (c) separating the supporting means in combination with the first retaining wall block from the housing means by moving the combination out of the one side of the housing means; (d) moving a second supporting means into the housing means and repeating steps (a) through (c) in order to create a second retaining wall block, while the first retaining wall block fully cures separately from the housing means to an extent to when the first retaining wall block can be lifted by itself without damage.
Other embodiments, apparatus, devices, features, characteristics, and methods of the present invention will become more apparent in the Detailed Description of Invention section and accompanying drawings and claims, all of which form a part of this specification.
The various embodiments and features of the invention will be clearly depicted in the following drawings. The components in the drawings are not necessarily to scale, emphasis instead being placed upon clearly illustrating the principles of the embodiments of the present disclosure. Moreover, in the drawings, like reference numerals designate corresponding parts throughout the several views.
The present disclosure provides various embodiments of a retaining block mold 10 of
The blocks 12 can be made from a variety of fabrication materials, but in the preferred embodiment, the blocks 12 are made from rebar re-enforced concrete. The mold 10 can also be made from a variety of materials, but in the preferred embodiment, the mold 10 is made from a metal, such as steel, with sufficient thickness and shape to handle very heavy rebar re-enforced concrete structures.
As illustrated in
The mold housing 14 has a plurality of legs 17 elevating and supporting the main mold housing 14 in order to enable the tray 16 to be received and removed under the housing 14. The mold housing 14 has several sides, an open bottom, and at least one door 24 in one of the sides. In the preferred embodiment, the mold housing 14 has two doors 24a, 24b. When the mold 10 is to be used to make a retaining wall block 12, the open bottom has the bottom tray 16 installed or situated therein to close the bottom of the mold housing 14. The one or more doors 24 are shaped and of sufficient size to define an opening to enable the retaining wall block 12 to be moved through when opened. The one or more doors 24 are designed to close the one side of the housing 14 when closed. One or more suitable bucklings 29, or clamps, of any suitable conventional design are used to maintain closure of the doors 24a, 24b when a block 12 is being made. The mold housing 14 has an internal cavity therein that defines an outer shape of the retaining wall block 12. The mold housing 14 has one or more openings, in this example, openings 26a, 26B, designed to receive and introduce the fabrication material (e.g., concrete) into the internal cavity.
The internal cavity has a sufficient number of sides 28 that angle inwardly from the doors 24a, 24b to enable the retaining wall block 12 with commensurate angled sides 32a, 32b (
In the preferred embodiment, the internal cavity has a generally planar rectangular bottom defined by the bottom tray 16 and interior sides of the mold housing 14 for creating the front portion 23 of the block 12 and a plurality of upwardly extending stem chambers 34 for creating the stems 38 (
It should be emphasized that the above-described embodiments, including the preferred embodiment, of the present disclosure are merely possible non-limiting examples of implementations, merely set forth for a clear understanding of the principles of the invention. Many variations and modifications may be made to the above-described embodiments of the present disclosure without departing substantially from the spirit and principles of the present invention. All such modifications and variations are intended to be included herein within the scope of this disclosure.
As an example of an alternative embodiment, it is possible that the bottom tray 16 could be separated from and returned to the mold housing 14 by means other than with wheels 25 on the tray underside. For instance, the tray 16 could possibly be lowered from the mold housing 14 through the floor, depending upon the outer shape (angles, etc.) of the block 12. There would need to be a sufficient number of sides that angle inwardly from the bottom to enable the retaining wall block 12 with commensurate sides to be removed from the internal cavity along with the bottom tray once the block is sufficiently cured.
As another example of an alternative embodiment, it is possible to make the tray 16 movable in a horizontal direction on a track or within a channel for removing and separating the tray 16 from the mold housing 14 without use of wheels 25 on the underside of the tray 16.
As another example of an alternative embodiment, the retaining wall block 12 can be manufactured with only one or more than two of the stems 38 so that the mold housing 10 will have a corresponding number of stem chambers 34 in the internal cavity.
