Abstract: A system includes a heating section configured to heat a sheet of plastic to generate a heated sheet of plastic. The system includes a plate configured to secure a mold associated with a dental arch of a patient. The plate includes a locking mechanism. The mold includes feature configured to interface with the locking mechanism. The system further includes a thermoforming chamber configured to thermoform the heated sheet of plastic to the mold that is secured to the plate via an interface of the locking mechanism with the feature to generate a thermoformed sheet of plastic. The locking mechanism is configured to extend through the mold and overlap an upper surface of the mold to lock the mold in a z-direction that is orthogonal to a plane defined by the plate. The system further includes a cutting tool configured to trim an aligner from the thermoformed sheet of plastic.

Abstract: A mold frame for the production of molded pieces, comprising at least one mold cavity, the at least one mold cavity being defined by a plurality of mold walls, wherein at least one mold wall of the mold cavity is a mold wall that is displaceably attached to the mold frame, and comprising at least one heating element for heating at least a part of the mold frame.

Abstract: A soft lithography template or stamp is made by casting a polydimethysiloxane (PDMS) or other suitable elastomeric precursor onto a master pattern. The master pattern may be formed utilizing known micro-fabrication techniques. The PDMS template includes an inverse copy of the micro-structures on the master pattern, and can be placed into a mold used to prepare a carbon-fiber reinforced polymer composite part or other polymer molding systems where a matrix material passes through a fluid state during the cure process. The liquid resin material flows into the structures on the surface of the PDMS template and hardens during the curing cycle. After the part is released from the mold, the PDMS template can be peeled from the surface of the part to reveal the free standing micro structures which are a replica of the master pattern.

Abstract: Embodiments of a mold for making a retaining wall blocks are disclosed. The mold enables blocks to be made more quickly by enabling separation of each block from the mold housing when the block is cured sufficiently 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. In one embodiment, among others, the mold has a movable bottom tray and a mold housing with at least one door. The mold housing has an opening designed to receive and introduce a fabrication material, such as concrete, into the cavity. Once a block is sufficiently cured, it is separated from the mold housing on the tray through the at least one door, and a new tray is inserted in the mold housing to make another block.

Abstract: The present invention discloses a method and a forming system that reduces the hydrostatic pressure caused by casting freshly mixed concrete or other cementicious material into a vertical form. Reducing the hydrostatic pressure in forms enables relatively weak materials to be used as forms and minimizes the amount of bracing necessary to support the forms—both of which lead to lower construction costs. The method uses the highly thixotropic properties of no-slump or low-slump concrete which enable the concrete to be quickly changed from a semi-solid state to a liquid state and back to a semi-solid state numerous times before it hardens and without affecting the concrete's quality. Since hydrostatic pressure is only present when a liquid state exists, minimizing the amount of liquid concrete in vertical forms will also minimize the hydrostatic pressure present.

Abstract: In one embodiment, a method for treating an infected implant area of a knee joint comprises surgically accessing the implant area, and inserting a tibial component into the tibia using an antibiotic-impregnated material. A femoral component is formed that is configured to interact with the tibial component by stable knee joint articulation and motion. The femoral component is formed of an antibiotic-impregnated material using a mold. The femoral component is attached to the femur using an antibiotic-impregnated material, and the tibial component is interfaced with the femoral component to form a stable temporary knee joint capable of reducing the spread of infection while permitting movement of the knee joint.

Abstract: A molding apparatus for an electronic device comprises a first mold chase, a second mold chase and a middle plate which is configured to be clamped together with the electronic device between the first mold chase and second mold chase during molding. A molding cavity formed in the middle plate is configured for receiving molding compound. A package pin is mounted on the middle plate to be movable with the middle plate, and a portion of the package pin is positioned to protrude into the molding cavity to form a mark in the molding compound when molding compound is molded around the said portion of the package pin.

Abstract: A structural surface design device for creating a design with finishing surface material on a surface, the device having a base with raised projections on the bottom. Such projections have less of an affinity for the finishing surface material than does the surface on which such finishing surface material is to be applied. A handle extends upward from the base. And, optionally, the cross-sectional shape of the base is the same as the cross sectional shape of a container for the finishing surface material with the dimensions of the container and the base being such that the edge of the base, when the base has been inserted into the container, is sufficiently close to the wall or walls of the container that any finishing surface material in said container will not cure.

Abstract: An apparatus for molding dry cast products having a textured side surface is disclosed. The apparatus comprises an open compartment for receiving a dry concrete mixture and a plurality of walls laterally enclosing the compartment. At least one of the walls has a multilevel surface with a plurality of sections in an overhanging relationship with each other and transitional curvilinear steps bridging adjacent one of the sections to impart a textured side surface resembling a natural rockface and allowing stripping of the dry cast products from an open bottom side of the compartment.

Abstract: A thermal insulation stamper includes a first metal layer, a heat insulating layer, an intermediate layer, a conductive coating, and a second metal layer. The first metal layer has a fine pattern on an exposed surface. The heat insulating layer is formed of a heat-resistant resin and overlies the first metal layer. The heat-resistant resin contains oxygen. The intermediate layer overlies the heat insulating layer. The conductive coating overlies the intermediate metal layer. The second metal layer overlies the conductive coating. A region with a high concentration of oxygen is formed in the vicinity of an interface between the heat insulating layer and the intermediate layer. A method for producing such a thermal insulation stamper is also disclosed.

Abstract: A mold and a process for preparing a customized hot pour product formed of a hot pour material. The process comprises the steps of providing a mold having a top part with a pour space and a base part, applying hot pour material into the mold through the pour space and allowing the hot pour material to cool, removing the top part of the mold to provide a first exposed surface, and releasing the base part to provide a second exposed surface. The mold may be customized to include inserts, removable members, projections, recesses, and combinations thereof in the base part and/or top part, thereby providing for a hot pour product with one or more exposed surfaces that are embossed, debossed, or both.

Abstract: A marking device comprises an outer shell in a cylindrical shape with a bottom surface attached to a molding device, a rotatable tube provided inside of the outer shell, an indicator connecting to the bottom of the outer shell and a support mechanism pushing up the rotatable tube from the internal space of the outer shell while the indicator and the outer shell are engaged with each other. The head of the indicator is formed in a frusto-conical shape tapered into the inside of the outer shell. The rotatable tube comprises an inner surface contacting to the outer surface of the head of the indicator, and an outer surface forming a frusto-conical head tapered into the inside of the outer shell from a second carved marks. The outer shell comprises an inner surface contacting to the outer surface of the head of the rotatable tube.

Abstract: A method of forming an identifying imprint on a resin-molded product, includes the step of dividing a material into a first portion and a second portion, to form an identifying surface on at least one of the first portion and the second portion. The method also includes the steps of molding a resin material into the resin-molded product, and transferring an imprint of the identifying surface onto the resin-molded product.

Abstract: A mold coding device and method for providing identifying information on a molded part. The surface of the molded part having at least one multiple identifying information element formed in the molded part and a pointing means on the molded part for selecting the identifying information elements.

Abstract: A wall block comprises an upper surface spaced apart from a substantially parallel lower surface, opposed first and second faces, and opposed side surfaces converging between respective ends of the first and second faces. Blocks in a wall may be stacked on top of each other in either a vertical, set forward or set backward relationship. A three-block system for constructing walls includes a small, medium, and large block, each having two differently sized faces that can serve as the exposed face on one side of a wall. The small, medium, and large blocks can be manufactured using a single mold that is configured to provide a roughened texture resembling natural stone on two opposing faces of each block.

Abstract: A gas-exhausting marking device that is easily attached to the molding device in an appropriate position where the marking device exhibit sufficient gas-exhausting effect. The upper surface and the bottom surface of the marking device according to the present invention are configured to be breathable to allow gas to flow therethrough.

Abstract: A system and method of forming differently sized and/or textured construction blocks from a single mold. The system includes a mold having a base and movable side walls that cooperate with the base to form a mold cavity, and one or more inserts that are configured to be positioned in the mold. The mold is arranged and oriented so that its side walls form the top, bottom, front, and rear surfaces of each block. The inserts may be used individually or grouped together into predetermined sets to form different blocks, such as interior and end blocks, as well as cap stones.

Abstract: A mold for manufacturing a corner-shaped simulated stone product has a mold cavity configured to imprint a stone texture on at least a first side face and a front face of the corner-shaped product. The mold also provides a back face with a desirable molded interior angle. The mold cavity can have a flexible edge around a perimeter of the mold cavity to impart a textured surface to a second side face of the corner-shaped product.

Abstract: A food patty-forming apparatus for forming food patties from pressurized food product includes a mold plate that is guided to reciprocate longitudinally between a fill position and a discharge position. The mold plate has a cavity that is open to the source of pressurized food product when in the fill position. The cavity is exposed when in the discharge position. A mold pattern having open areas and solid areas is arranged adjacent a first face of the cavity, and indented from a second face. A knockout plunger has open areas corresponding to the solid areas of the pattern and solid areas corresponding to the open areas of the mold pattern. The knockout plunger is shaped to allow the solid areas of the plunger to penetrate into the cavity past the first face of the cavity around the solid areas to displace a patty formed in the cavity.

Abstract: The object of the present invention is to provide a removable marking device for a mold that enables to leave two marks of different meanings accurately with simple operation. A removable marking device for a mold has a control mechanism that allows said indicator axle to rotate with said rotatable tube when said indicator axle rotates in the other direction.

Abstract: An insert for a mold comprising a plug, having an insert face, and a receiver defined by a sidewall with one of the plug and the receiver having a groove that receives a guide that extends from the other of the plug and the receiver so as to facilitate rotation of the plug while opposing withdrawal of the plug. In one preferred embodiment, the groove has an inclined entranceway, that facilitates plug insertion and removal, and a transverse portion and extends circumferentially no more than about one and one-quarter rotation about the plug. In another embodiment, the guide is resiliently urged outwardly from the plug to ride in a groove in the sidewall and the sidewall has an access port for prying free the plug from the receiver. A detent assembly comprised of notches on the plug and a detent carried by the receiver permit the plug to be selectively indexed. The insert can be mounted to or carried by an ejector pin having a head constructed and arranged to prevent rotation of the pin during mold operation.

Abstract: Apparatus and methods are disclosed for making masonry blocks with one or more surfaces having a roughened texture resembling that of a split block or natural stone. In one embodiment, a mold comprises a plurality of walls defining at least one mold cavity adapted to receive block-forming material. The mold defines an opening through which a formed, uncured block may be removed from the mold. At least one wall of the mold has a plurality of projections extending into the mold cavity so as to contact an adjacent surface of the uncured block in the mold cavity. The projections are positioned such that when the uncured block is removed from the mold, the projections texture the adjacent surface of the uncured block.

Abstract: A molding apparatus for generating toric contact lenses, comprises a convex inserter, a front convex inserter carrier, a rear convex inserter carrier, and a first and a second fasteners. The convex inserter, used to form a convex outer surface of toric contact lens, has positioning lines on its convex head. It is embedded in the front convex inserter carrier which also has positioning lines on its upper brim, jointing with the convex inserter, and an angle pointing line on its cylindrical surface. A first fastener is used to helically tighten the convex inserter to the front convex inserter carrier while a second fastener joining the front convex inserter carrier with the rear convex inserter carrier. The front convex inserter carrier is embedded in the rear convex inserter carrier which has a number of lines representing angles of astigmatism on its cylindrical surface.

Abstract: Having a body that forms the marking insert body. This body has a central opening into which the marking case will be inserted and a ring being set out externally on the side to be inserted into the mould, on which different motifs to be transferred to the moulded body, will be engraved. Internally it has a nut secured by means of a spring to the closing end-cap, the shaft of the marking unit screwing into said nut, the spring staying in tension while in use, and retaining the marking insert from a possible withdrawal.

Abstract: A form for casting concrete columns which simulate a stack of stone blocks. The form includes first and second side sections, each including two side panels. The side sections are releasably connected together to form a rectangular frame which has closed and open positions. The frame and a base on which the frame rests supports a column side insert. The column side insert has a central opening in which a column is cast. The column side insert imparts a desired appearance to the exterior sides of the cast column. After a column is cast, the side sections are moved to an open position and the column side insert is separated from the column.

Abstract: A contoured wall and method is disclosed for creating the contour and appearance of a wall formed from individual assembled units such as stones. The wall is formed from a plurality of mating form liners each having a reciprocal contoured surface to that of the desired stone wall. The wall is formed from hardenable construction material such as concrete poured between two mold members with the form liners attached to at least one of the mold members. Each of the form liners has a lateral relief mold face adapted to provide a molded surface having the contour of a stone wall. Each lateral relief mold face of the form liners has a latticework non-linear mortar-forming interlocking portion surrounding stone-forming recessed portions. The form liners are positionable in a plurality of arrangements wherein the interlocking portions and recessed portions along the mating edge of each form liner mate along mating edge of the adjacent form liner to form a continuous lateral relief mold face.

Abstract: An impression mold includes a main body and a detachable segment. The main body has an obverse bearing a first intaglioed pattern, and is formed with an opening defined in the obverse thereof. The segment has an obverse bearing a second intaglioed pattern and has a shape complementary to the opening of the main body. Therefore, a complete pattern is formed by the two intaglioed patterns when the segment is fitted in the opening of the main body.

Abstract: A marker having three parts: an annular, enveloping body that is fixed in the location of the mold; and an equally annular intermediate body that is rotatably mounted inside intermediate body and which can rotate relative to the body. Each of these three parts is provided with a signal. Two narrow annular locations are disposed in the area of the marker opposite the operative front, where a helical spring ending in a lug is placed in each of the locations. The lug of the outer spring is the single actuation control of the marker while the lug of the inner spring exhibits play in a small location of the intermediate body. Both springs are oppositely coiled in such a way that strangling of one of the springs takes place simultaneously while the other spring is being released.

Abstract: A method and apparatus for vacuum thermoforming disposable drink cups lids including the step of imparting printing to the lids in two or more colors while they are in contact with the vacuum thermoforming platen.

Abstract: A high volume lens curing system is described. The high volume lens curing system may be configured to cure multiple eyeglass lenses in a continuous manner. An embodiment of the lens curing system includes an apparatus for preparing an eyeglass lens. The apparatus may include ones or more lens curing units, a mold assembly, and/or a mold holder.

Abstract: A method and apparatus for vacuum thermoforming disposable drink cups lids including the step of imparting printing to the lids while they are in contact with the vacuum thermoforming platen.

Abstract: Apparatus and methods are disclosed for making masonry blocks with one or more surfaces having a roughened texture resembling that of a split block or natural stone. In one embodiment, a mold comprises a plurality of walls defining at least one mold cavity adapted to receive block-forming material. The mold defines an opening through which a formed, uncured block may be removed from the mold. At least one wall of the mold has a plurality of projections extending into the mold cavity so as to contact an adjacent surface of the uncured block in the mold cavity. The projections are positioned such that when the uncured block is removed from the mold, the projections texture the adjacent surface of the uncured block.

Abstract: A mould for casting shaped, solid detergent articles is provided. The mold is made of two rigid complimentary dies which upon engagement define a cavity corresponding to a desired shape of the cast article, wherein the engaged dies form a reservoir which on one side is open to receive cast melt and on another side is open to the cavity.

Abstract: A mold structure includes an upper mold and a lower mold. The upper mold is installed with an upper mold core, and the lower mold is installed with a lower mold core. A mold cavity is formed between the upper mold core and lower mold core. A mother plate disposed in the mold cavity is replaceably coupled to one of the mold cores. The mother plate includes a glass substrate with a metal film thereon. The metal film defines a pattern that is transferred to the plastic material molded in the mold cavity.

Abstract: Said marker consists of three parts: an annular, enveloping body that is fixed in the location of the mold; an equally annular intermediate body that is rotatably mounted inside the first body and a central axle that is mounted inside the intermediate body and which can rotate relative to said body. Each of the three above-mentioned parts is provided with signaling means. Two narrow annular locations are disposed in the area of the marker opposite the operative front, wherein a helicoidal spring ending in a lug is placed in each of said locations. The lug of the outer spring is the single actuation control of the marker while the lug of the inner spring exhibits play in a small location of the intermediate body. Both spring are oppositely coiled in such a way that strangling of one of the springs takes place simultaneously while the other spring is being released.

Abstract: A tire mold comprises a molding face for shaping the outside of a tire and a vent structure, wherein the vent structure comprises a hole having an opening in the molding face, an inserted piece disposed in the hole so that the surface of the inserted piece defines a part of a molding face, and a micro-gap of not more than 100 micrometers formed between the inserted piece and the hole for the purpose of vent.

Abstract: A marking device is provided that can confirm a mark imprinted on a molded piece from outside a molding tool and can inscribe a plurality of marks with a sole marker. The marking device consists of a reference sleeve, a top imprint portion, a sleeve, a top imprint portion, and a pin. The reference sleeve is fixedly assembled and has the top reference imprint surface confronting a molding area, a reference imprint mark being formed on the stamp surface. The top imprint portion is rotatably journaled within the reference sleeve and has the top display imprint surface being flush with the top reference imprint surface, on which data imprint marks to be pointed by a reference imprint mark are formed. The sleeve has a base end actuator, on which data display are indicated, formed at a protrusion protruded from a molding area outward.

Abstract: An insert for a mold comprising a plug, having an insert face, and a receiver defined by a sidewall with one of the plug and the receiver having a groove that receives a guide that extends from the other of the plug and the receiver so as to facilitate rotation of the plug while opposing withdrawal of the plug. In one preferred embodiment, the groove has an inclined entranceway, that facilitates plug insertion and removal, and a transverse portion and extends circumferentially no more than about one and one-quarter rotation about the plug. In another embodiment, the guide is resiliently urged outwardly from the plug to ride in a groove in the sidewall and the sidewall has an access port for prying free the plug from the receiver. A detent assembly comprised of notches on the plug and a detent carried by the receiver permit the plug to be selectively indexed. The insert can be mounted to or carried by an ejector pin having a head constructed and arranged to prevent rotation of the pin during mold operation.

Abstract: This invention relates to a method for producing cellular molded article in mold pattern of synthetic resin having surface skin which is used, for example, as an automobile interior trim material or the like and a mold pattern for producing thereof. This invention aims to provide a method for producing cellular molded article of synthetic resin having surface skin which has good production efficiency and which comprises that cellular molded article of synthetic resin obtained by cellular molding of expanded beads in which poor melt bonding does not occur and thermoplastic resin skin material united with this cellular molded article of synthetic resin which has excellent appearance without residing beads pattern on its surface, and a mold used for producing thereof.

Abstract: A multiple axes electroform is created by first locating a plurality of reflex or optical pins and a mold matrix that extends generally parallel to a first axis. A second mold matrix is created by loading into a fixture yet another set of pins that are generally parallel to a second axis. Electroforms are then made from each mold matrix. The resulting electroforms are then placed into yet another fixture whereby a third electroform is made. The third electroform is then placed into a final fixture where a master electroform is made which will be used in the tooling that is used to injection mold the final automotive lens assembly.

Abstract: A microprism master mold is formed from a plurality of flat sheets having two mutually parallel major surfaces. On one edge thereof, there is provided a series of V-shaped grooves having a bottom angle of about 90.degree. and roof-shaped projections having a vertical angle of about 90.degree., successively formed at a fixed repeating pitch and in a direction perpendicular to the major surfaces. The flat sheets are stacked so that the vertices of the roof-shaped projections formed on each flat sheet meet the bottoms of the V-shaped grooves formed on an adjacent flat sheet. The microprism master mold includes two or more different types of roof-shaped projections and the thickness of each flat sheet is equal to 0.6-2.0 times the length of the shorter oblique sides of the roof-shaped projections. The master mold is useful for production of cube-corner type retroreflectors characterized by microprism having high brightness and excellent wide-angle properties.

Abstract: The invention concerns a process and an associated device for the manuface by molding on a countermold (1) by means of a pourable, solidifiable material, a mold intended for molding at least a portion of a tread of a tire, said mold comprising one or more separately made molding elements (4) protruding from said mold. Each element is put in place in a housing (5) in the countermold (1) before the actual production of the mold, in such a manner as to permit easy removal of said mold.

Abstract: A patterned shaped article is produced on a given surface by a method including the steps of disposing a partition body on the given surface, temporarily fixing a plurality of cut pattern pieces to the upper surface of the partition body or the upper surface of a mesh member disposed on the partition body so that the cut pattern pieces are disposed adjacent to each other to constitute a pattern to be formed, unfixing one of the cut pattern pieces from a portion of the upper surface to which a pattern-course material is to be supplied, supplying the pattern course material to the portion, repeating the unfixing and supplying steps until the partition body is filled with a prescribed amount of pattern-course materials, removing the partition body alone or together with the mesh member from the pattern-course materials, and allowing the pattern-course materials to set into the patterned shaped article on the given surface.

Abstract: A mold for molding or injection-molding polymer compounds, having at least one mold ancillary unit, in particular an ejector device (10), preferably an ejector pin, and/or a core pin device is distinguished by the fact that the mold ancillary device (10) has, at least over a region, a marker unit (18) in the region facing the polymer compound during the molding or injection-molding.

Abstract: A marker device insertable in a plastic injection mold, has a hollow body lockable in the mold so that an external surface of the hollow body is flush with an internal wall of the mold, the hollow body being provided with a cylindrical central orifice, a cylindrical head which is tightly placed in the cylindrical central orifice of the hollow body and extending toward an interior of the mold via an internal coaxial rod which pierces the hollow body and has an outer end provided with an external surface which is flush with the internal wall of the mold, the head being turnable on its own axis for varying its angular position with respect to the hollow body, and an actuator unit embedded in the wall of the mold connected to the internal rod of the head and commandable from outside of the mold by an external control unit, the actuator unit turning the head on an axis of the head in any of both rotation directions.

Abstract: A mold designed to be operated easily by one person to form large blocks. Generally, the walls of the mold are attached to the base with a pivoting assembly such that the walls of the mold fall away from the molded material after hardening. Levers and fulcrums of various designs are used to facilitate the mold wall movements. Additionally, quick release and tightening mechanisms are used to secure the mold walls. Also, the wall of the mold can be designed to incorporate patterns such that the blocks formed in the molds can interlock when stacked, forming a very sturdy wall. Further, specially designed inserts can be utilized to quickly modify the mold.

Abstract: The present invention provides a removable marking device for a mold which includes a substantially cylindrical outer member fitted into the mold, an axially rotatable indicator fitted into the outer member and indications formed on top surfaces of the outer member and the indicator which is formed by an indication portion facing an inner surface of the mold and a screw portion extended from the indication portion, the outer member having a three-stepped bore which has an upper bore portion, a middle bore portion extending from the upper bore portion of a cross-sectional dimension larger than that of the upper bore portion and a lower bore portion extending from the middle bore portion of a cross-sectional dimension larger than that of the middle bore portion, the indicator inserted into the bore with the indication portion arranged in the upper bore portion and the screw portion arranged into the middle bore portion, a cover member inserted to the lower bore portion and clinging to the outer member, a nut th

Abstract: A decorative candle that includes an outer wax layer, at least one specifically shaped wax inlay, a wax plug, an inner wax filler, and a substantially rigid wick. The outer wax layer has a color, a first side, a second side, a top with a length, a bottom with a length, an outer surface, and at least one specifically shaped aperture being disposed therethrough. The at least one specifically shaped wax inlay has a color different than the color of the outer wax layer. Each of the at least one specifically shaped wax inlay is disposed in a respective one of the at least one specifically shaped aperture of the outer wax layer. The wax plug has a perimeter, a centrally disposed throughbore and is disposed at the top of the outer wax layer. The outer wax layer and the wax plug define a filler chamber. The inner wax filler has a bottom, a centrally longitudinally disposed throughbore, and is disposed within the filler chamber.

Abstract: An injection plastic mold is provided with its own on-board monitor or counter, which is actuated with each opening and closing cycle of the mold to maintain a count of the operating cycles performed. This count is maintained with the mold, whether the mold is on the press or a storage rack. The counter or monitor is relatively inexpensive and unobtrusive and is capable of withstanding harsh temperatures and shock that are encountered in an injection molding environment. The counter or stroke monitor may be either a mechanical counter or an electrical counter which is incorporated into a mold half to remain with the mold when it is stored away from a molding machine, when operated during an initial set-up operation, and when operated during a production run. Whether an on-board mechanical counter or an on-board electrical counter, the counter is hermetically sealed against the intrusion of damaging liquids or chemicals and is mounted in a protective housing to protect against shock, etc.

Abstract: The present invention is a contoured wall and method for creating the contour and appearance of a wall formed from individual assembled units such as stones. The wall is formed from a plurality of interlocking wall portions that each have at least two non-linear mating surfaces. Each of the wall portions further has a lateral face contoured to resemble the stone wall. The wall is formed from hardenable construction material such as concrete poured between two mold members. Each of the mold members has a lateral mold face with at least one of the lateral faces having a plurality of interlocking contoured relief portions to provide a molded surface having the contour of a stone wall. In one embodiment, at least one of the mold members includes a plurality of individual form liners, or mold modules, each of which includes two non-linear mating edges and a lateral relief mold face.