DE2128448A1 - Fire-resistant brick with a metal casing and method and apparatus for attaching a metal casing to a fire-resistant brick - Google Patents

Description

DR. ING. E, HOFFMANN DIPL, ING. W. EITLE DR. RER, NAT. K. HOFFMANN

0-8609 MUNICH 91 · ARA & EUASTRASSE 4 · TCIEFON «Win WWW 2128448

General Refractories Company, Philadelphia, Fa./USA

Fireproof brick with a metal case and method and device for attaching a metal housing »to a fire-resistant brick

The invention relates to a furnace stone consisting of a fire-resistant brick with a metal casing and to a method and an apparatus for attaching a Metal plate as a metal housing on the fire-resistant brick.

Oven bricks consisting of fire-resistant bricks with a metal casing are generally used for industrial applications Construction of stoves used. This type of stove stone is special useful for furnaces intended for metalworking operations. In one built from such stove bricks Furnace hosts the heat generated in the furnace that the

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Melt the metal casing of the furnace bricks together and create a Form a homogeneous lining of the furnace. The molten metal of the housing contributes to the mechanical: strength of the furnace walls at · Further, part of the metal of the housing penetrates into the fire-resistant material of the brick and leaves that Adhere housing to the brick. So the furnace bricks used in the ceiling of the furnace form one from the molten metal the housing existing support structure to which hangers or other devices can be attached. With regard to it is very much on the above properties of the stove stones desirable to use them in the construction of industrial furnaces.

In the technique of wrapping fire-resistant bricks with metal plates it is necessary to create a metal casing which is firmly and tightly connected to the brick. This tight enclosure is necessary to prevent the brick from accidentally sliding out of its housing during handling of the furnace stone to prevent the formation of annoying fire channels in the furnace walls in spaces between the tallgehäusen Me and to avoid the fire-resistant bricks and difficulties in maintaining the alignment of the enveloped Turn off bricks while the furnace is being set up.

It has been commercially available so far because of the uneven size refractory bricks available have been difficult to manufacture refractory bricks with tight-fitting metal housings. The unevenness in size results inevitably from the manufacturing process for fire-resistant bricks. So it is desirable to have a technique for that Attaching a metal case to a fire-resistant one To create bricks that compensate for the uneven brick size.

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Known methods of making metal casings for fire resistant bricks have involved one to four preforms Metal plates are used on the outer surfaces of the brick, these plates being spot welded to one another attached or attached to the brick with glue. In some cases it has been necessary to provide longitudinal slots in the metal plates to accommodate the bending of the plates into shapes to lighten the sides of the brick.

The most common arrangements for metal enclosures have been: (1) Made a one-piece metal enclosure made of partially pre-formed metal plates, the ends of which are fastened together by spot welding; (2) a pair of U-shaped Metal plates that overlap each other on opposite sides of the fire-resistant brick and are spot welded are attached to each other; (2) a pair of U-shaped Panels which are attached to the brick with glue and the ends of which are anetouched on opposite sides of the brick; (4) a pair of L-shaped metal plates attached to the fire retardant brick with glue and butted together Have ends at opposite corners of the brick; and (5) four L-shaped metal plates with overlapping ends on all surfaces of the fire-resistant brick which are fixed to each other by spot welding.

For industrial applications, the metal housing of the furnace brick is preferably held together mechanically. So furnace bricks with metal housings held together by spot welding have been more desirable than furnace bricks with metal housings, which are attached to the surface of the fire-resistant brick with glue. A typical characteristic known furnace bricks with welded metal housings, however, are the loose or poorly fitting housings with the top

$ 109,882 / $ 116

described disadvantages. Furthermore, the use of pre-formed U-shaped metal plates does not allow compensation for the changing brick size.

In known housing arrangements which have an uneven To compensate for brick size, overlapping ends of the metal plates are common on all surfaces of the fire resistant Brick provided. These overlapping arrangements require an excessive amount of metal to clad of the fire-resistant brick, thus increasing the cost of producing the stove brick.

The main object of the invention is therefore to provide an improved furnace stone and a method and apparatus for To create this kiln brick.

Other objects and advantages of the invention are set forth, in part, in the following description, and in part are evident they can be derived from this description or can be recognized in the practical utilization of the invention, the Objects and advantages of the invention can be realized and achieved with the methods, devices and combinations as they are in particular are presented in the claims.

The object of the invention is with a furnace brick with a brick made of fire-resistant material with an outer Surface solved according to the invention in that a metal plate corresponding to the outer surface of the brick for Form a metal casing for the brick to be laid around it, with the opposite ends of the metal plate overlap each other on the outer surface of the brick, and fastening means for mechanically fastening the overlapping Ends of the metal plate to each other and for fastening the metal housing to the brick are provided.

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The invention provides a furnace brick with a metal housing which is tight and firm to the fire-resistant brick is attached. This stove brick does not require the use of glue to ensure that the brick does not slides out of its metal housing. Furthermore, it is not necessary that longitudinal slots in the housing of the furnace brick forming metal plate are designed to ensure that the metal plate is in the right places accordingly the sides of the brick is bent shaped.

The metal casing of the furnace brick is formed from a single metal plate which is in contact with the outer one The surface of the fire-resistant brick is bent. The metal housing has overlapping ends, which through at least a deformation formed in the overlapping ends mechanically are connected to each other. The deformation in the overlapping ends of the metal shell fastens that too Housing on the fire-resistant brick.

In a preferred embodiment of the invention Oven stone, the refractory brick has one longitudinal groove formed along its outer surface, and the opposite one Ends of the metal plate overlap the longitudinal groove. This preferred embodiment also has a plurality of formed in the overlapping ends of the metal plate Deformations to secure the overlapping ends together and for engagement with the brick to secure the metal shell to the brick. Optionally, the overlapping Ends of the metal plate by a plurality of welded joints instead of the deformations with one another be connected.

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The invention further relates to a method of attaching a metal plate to a fire-resistant brick.

The object of the invention is achieved with such a method according to the invention in that the brick on the metal plate in a position midway between the ends of the metal plate, those on opposite sides of the brick located parts of the metal plate are bent into contact with the sides of the brick that are above the brick protruding parts of the metal plate in contact with the top surface of the brick to overlap the ends of the metal plate are bent and the overlapping ends of the metal plate are fastened together to create a metal housing for the brick will.

In the method according to the invention, the fire-resistant brick itself is used as a positive molded part to form a Metal housing used from a single metal plate. The process automatically compensates for the changes in size the fire-resistant brick and creates a furnace brick, which is a metal casing that is tightly and firmly attached to the brick having.

A preferred form of the method is that the metal plate is in contact during bending of the metal plate with the sides of the brick held firmly against the brick and the bent parts of the metal plate while the bending of the metal plate in contact with the top surface of the brick is held firmly against the sides of the brick will. The brick has a centrally located longitudinal groove on its upper surface and a plurality of spaced apart recesses formed in the longitudinal groove. The ends of the metal plate are overlapped at the longitudinal groove and

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are punched through to a multitude of locking deformations to produce in the metal plate, which protrude into the recesses in the brick and the Metallplefcfce mechanically connect with the brick.

The invention further relates to a device for attaching a metal plate to a fire-resistant brick.

The object of the invention is achieved with such a device according to the invention in that the device has a Having structure for forming a negative mold space, means for pressing the bottom surface of the fire-resistant Brick against the metal plate and for moving the brick and metal plate into the negative mold space to bend the metal plate in contact with the sides of the brick is provided means for bending the over the brick upwards protruding parts of the metal plate in contact with the top surface of the brick to overlap the ends of the metal plate disposed in the apparatus, and means for deforming the overlapping ends of the metal plate for attachment of the overlapping ends to each other and to create a metal housing for the fire-resistant brick is.

The device works according to the invention Process and produce a furnace brick with a metal housing that is firmly and tightly attached to the fire-resistant brick is.

In a preferred embodiment of the device there is a device for holding the metal plate against the floor surface of the brick is provided while the brick and the metal plate are pressed in the negative mold space, and one

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Means for holding the bent parts of the metal plate against the sides of the brick while covering the brick protruding parts of the metal plate are bent into contact with the top surface of the brick. The preferred one Embodiment furthermore has at least one breakdown device which is used to form a locking engagement metal curls located with one another in the metal plate for fastening their ends to one another engaged with the overlapping ends of the metal plate is movably attached.

The drawing shows preferred embodiments of the Invention and serves together with the following description to explain the principles of the invention. In the drawing show:

Figure 1 is a perspective view of one according to the invention built stove brick with a fire-resistant brick and one formed from a single metal plate Metal case,

FIG. 2 is a partial sectional view of the furnace brick taken along line 2-2 in FIG. 1;

Fig. 3 is a perspective view of the first station of a Device for attaching a metal plate to a fire-resistant brick made according to the invention is built up and works,

4 and 5 front views of the device according to FIG. 3 * which the operation of the first station of the apparatus in bending a metal plate into contact with the sides of a fire-resistant brick,

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Pig. 6 and 7 front views of a second station of the device, which is the bending of the metal plate in contact with the top surface of the fire-resistant Brick represent, and

Pig. 8 is an enlarged partial sectional view of an element for applying pressure and a breakthrough device, which in the second station of the device are arranged.

According to the invention, a furnace brick comprises a brick of fire-resistant material with an outer surface on.Pig. 1 and 2 show a preferred embodiment of one Furnace stone constructed according to the invention. As shown in Pig.l, the furnace brick 20 comprises a brick 22 made of fire-resistant Material. In the preferred embodiment, the brick has is rectangular in shape and has a bottom surface 24, a top surface 26, and sides 28 and 350. In other In embodiments, the brick may have sloping sides, as in the case of a trapezoidal brick, or it may be irregular Have shape.

In the preferred embodiment, the brick has fire resistant material one along its external surfaces formed longitudinal groove. As shown in Figs. 1 and 2, in the brick 22, the longitudinal groove is in its upper Surface is formed and extends in a direction parallel to sides 28 and 30 of the brick. in case of a rectangular refractory brick as shown, the longitudinal groove is preferably in the middle of the upper one Face of the brick.

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Welter in the preferred embodiment are one A plurality of recesses formed in the longitudinal groove of the fire-resistant brick. According to FIG. 2, the Brick 22 has a plurality of recesses J54, of which one is shown, and which in the longitudinal groove 32 on the upper surface 26 of the brick are molded. The recesses J4 are preferably evenly spaced along the longitudinal groove 32 is arranged.

According to the invention, the furnace brick has a metal plate which surrounds the outer surface of the fire-resistant Brick is shaped and results in a metal housing for the brick. The opposite ends of the metal plate overlap on the outer surface of the brick. As in the exemplary embodiment in FIG. 1 As shown, a metal plate 36 is provided which supports the bottom surface 24, the top surface 26 and the sides 28 and 30 of the fire-resistant brick 22 is shaped accordingly. The metal plate 36 has overlapping ends 38 and 40, which overlap along the longitudinal groove 32 of the fire-resistant brick.

The metal plate of the preferred embodiment is a flat steel plate and can be embossed if desired included to allow expansion. The metal plate does not have to be slotted on the edges of the brick to allow the metal plate to be bent into a housing corresponding to the sides of the brick. The preferred one Embodiment of the furnace brick can have a layer of asbestos material between the fire-resistant brick and have the metal housing to an extent iju enable.

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In the preferred embodiment, one end has the Metal plate a paragraph, which is received in the longitudinal groove of the fire-resistant brick, so that a substantially flat outer surface of the metal housing results in the longitudinal groove. In Fig. 1 and 2 it can be seen that the end 40 of the metal plate 36 is a stepped part 42, which in the longitudinal groove 32 below the end 38 the metal plate is arranged. Since the stepped part is received in the longitudinal groove, the upper surfaces result of the ends 38 and 40 of the metal plate substantially one flat outer surface for the metal casing of the fire-resistant brick.

According to the invention, the furnace stone has fastening means for mechanically fastening the overlapping Ends of the metal plates to each other and for attaching the metal housing to the fire-resistant brick. In the preferred embodiment, the fastening means consist of at least one deformation, which in the overlapping Ends of the metal plate for securing the overlapping ends together and for engaging the brick is molded to attach the metal housing to the brick.

In the embodiment of FIGS. 1 and 2, the deformation consists of a breakdown in the overlapping ends the metal plate. Fig. 1 shows a plurality of punches formed in the overlapping ends 38 and 40 of the metal plate 36 are formed.

In Fig. 2 one of the perforations 44 is shown more clearly. As shown, ends 38 and 40 of metal plate 36 are punched through and are a portion of the metal of each

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End of the metal plate is displaced to engage in locking to form metal curls located with one another. The punched through part of the end 38 of the metal plate results Metal curls 46 and 48. Similarly, the punched through portion of the stepped portion 42 at the end 40 of FIG Metal plate metal curls 50 and 52, which with the Metal curls 46 and 48 are in locking engagement.

The blocking metal curls of the perforations 44 prevent ends 38 and 40 of the metal plate from separating. This is how the metal curls secure the ends of the metal plate to one another to form a mechanically closed metal housing for the fire-resistant brick 22 result.

In addition, there are the metal curling of the copies 44, as they are in corresponding recesses J4 in the fire-resistant Bricks 22 protrude into engagement with the refractory brick and secure the metal casing to the brick. In this way, the fire-resistant brick 22 is prevented from sliding out of the metal housing. Glues are like that or other special means are not required to prevent the tile from sliding out of the sefriem housing.

In another embodiment, the remote Part 42 of the metal plate may be attached to the end 38 of the metal plate by welding. In this embodiment are a plurality of welded joints between the overlapping parts of the metal plate at the longitudinal groove 32 of the brick carried out to a substantially flat to yield outer surface of the metal housing at the longitudinal groove.

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As a device according to the invention, a two-stage device is provided which has a metal housing for the fire-resistant Forms brick from a single sheet of metal. Figures 3 to 5 show the first station of a preferred embodiment of the device, and Figures 6 and 7 show its second Station.

According to the invention, the device has a Structure that provides a negative mold space. In the preferred embodiment, this includes the negative Forming space providing structure a first stationary mold part and a second mold part, which relative to the first stationary mold part movable and removed from this 1st to an opening for receiving the metal plate and the fire-resistant To create brick. The preferred embodiment includes means for biasing and pushing the second mold part to the first stationary mold part a \ jf.

As shown as an embodiment in Fig. 3, the first station of the device has a base plate 5 ^ ·, on which a first stationary mold part 56 is attached. Furthermore, a second molded part 58 is mounted on the base plate 5 ^ so that it can slide with respect to the first molded part 56. The device for biasing in this embodiment is a spring 60, which between the second molded part 58 and a support part 62 fastened on the base plate 54 is arranged is. The spring 60 pushes the second molded part 58 toward the first stationary molded part 56. The pen holds it second mold part normally in such a position that the distance between the mold parts is less than the width of the brick 22 is.

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The stationary mold part 56 and the movable mold part 58 have first beveled surfaces 64 and 66, respectively, and second vertical surfaces 68 and 69, respectively. The beveled surfaces are for engaging parts of the metal plate on opposite ones Sides of the brick provided «around these parts partially to bend towards the sides of the fire retardant brick 22. ' The vertical surfaces are for engaging with the same parts of the metal plate 36 are provided around this Bend parts in contact with the sides of the fire-resistant brick. How these surfaces work when bending the Metal plate is described below.

According to the invention, the device comprises means for pressing the fire-resistant brick against the metal plate to move the bottom surface of the brick and the metal plate into the negative mold space and to bend the metal plate in contact with the seldom of the brick. Vie in the embodiment in Flg. 3 and 4 shown, the device has an element 70 for application downward pressure on the fire resistant Brick 22 on. The element 70 for applying pressure is via a frame 71 and a shaft 72 with a suitable one Actuating device, e.g. connected to a hydraulic cylinder 73 *. The hydraulic cylinder is held by a fixed Platform 74 supported on a plurality of the base plate 54 upstanding support rods 75 attached is. A pair of guide rods 76 extend upwardly from pressure application member 70 and slide in one Pair of openings in platform 74.

The hydraulic cylinder has two hydraulic lines 77 and 78 for receiving fluid under pressure from one source, not shown, for actuating the hydraulic cylinder.

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When the fluid under pressure is supplied to the hydraulic cylinder via the hydraulic line 77, transmits the hydraulic cylinder forces downward as indicated by an arrow 79 on the shaft 72 and the element 70 for applying pressure to the fire-resistant Brick 22 and metal plate 36 as in FIG. 5 shown moving into the negative porm space. When the hydraulic cylinder via the hydraulic line 78 fluid is supplied under pressure, the stem 72 is returned to its original position, as in Pig. 4 shown, lifted.

In a preferred embodiment of the device there are means for holding the metal plate against the floor surface of the fire-resistant brick provided, while the fire-resistant brick and the metal plate in the negative porm space be pressed. As shown as an embodiment, these devices comprise a platform 80 which between The stationary mold part 56 and the movable mold part 58 is mounted vertically movable in the negative Pormraum. As shown in Figures 3 and 4, the platform is in place normally in an upwardly extended position relative to the negative mold space. The platform 80 is at the ends a shaft 81 is attached, which is mounted in an opening 82 in the base plate 5 ^ so that it can slide vertically is.

Means are also provided for biasing the platform in its normally extended position to hold and to exert increasing force on the platform when the brick and metal plate are in the negative Pormraum be moved to hold the metal plate firmly against the bottom surface of the brick. Like in Pig. 4th As shown, the platform 80 and shaft 81 are in a normally elevated position relative to the base plate 5 ^

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a tension spring 84 is biased, which has one end on the shaft 81 and the other end on the base plate 54 is attached.

When the platform 80 and the shaft 81 are fed through the shaft 72 and the element 70 for applying pressure Forces are moved downward, the tension spring 84 exerts an arrow 86 in Pig. 5 indicated increasing force up on the shaft 81 and the platform 80 to the metal plate 36 firmly against the bottom surface of the fire-resistant Keep brick 22.

According to the invention, the device further comprises means for bending the over-the-fire resistant ones Brick upwardly protruding parts of the metal plate in contact with the top surface of the brick and to overlap the ends of the metal plate. In the preferred embodiment, this device comprises a first pivot arm for engaging a portion of the metal plate to partially bend that portion toward the top surface of the brick, and one second pivot arm for engagement with the other part of the metal plate, to partially bend this other part towards the top surface of the brick. Welter instructs this facility a pressure plate which can be moved into engagement with the partially bent parts of the metal plate to bend these parts into contact with the top surface of the brick.

As shown as an exemplary embodiment in FIG. 6, the second station of the device has a first pivot arm 88 which is pivotably mounted on a support arm 92 attached to a block 94 via a pin 90. Of the Block 94 is in a stationary position on a base plate

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appropriate. A second pivot arm 98 is over a pin 100 pivotally mounted on a support arm 102 attached to a block 104. The block 104 is on the base plate 96 slidably mounted relative to block 94. On the block 104 an inclined control surface 105 is formed. The control surface cooperates with a pair of vertically movable cams described below to move the block 104 relative to the block 94, as indicated by an arrow 103, to move.

The device according to Figure 6 has a pressure plate 106 which is attached to a block I08 by a pair of cut bolts 109. The bolts are in the block 108 and are attached in oversized openings in the pressure plate 106 added. A pair of coil springs 110 are on the bolt I09 between the block I08 and the pressure plate arranged. The block I08 is mounted on an operating platform 111, which is supported on guide rods projecting from the base 96 112 is mounted so as to be vertically slidable relative to the base plate.

The operating platform 111 is with a shaft II3 a suitable actuator such as a hydraulic cylinder 114. The hydraulic cylinder is on one Platform 115 attached, which at the upper ends of the guide rods 112 is attached. The hydraulic cylinder 114 is driven by a pair of hydraulic lines not shown applied fluid under pressure. When the fluid is pressurized to the hydraulic cylinder via a is supplied to the hydraulic lines, the hydraulic cylinder exerts downward forces on the shaft 113, to move the operating platform 111 and the pressure plate I06 downward as indicated by an arrow II7 is. When the fluid under pressure passes the hydraulic cylinder

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linder is supplied through the other hydraulic line, the shaft II3 is returned to its original position, as in FIG Fig. 6 shown, lifted.

The preferred embodiment of the device has a pair of cams II9, one of which is shown in FIG and which are mounted on the platform II5. Each cam II9 has an inclined control surface 121 for the Engagement with the control surface 105 of the block 104 to move that block towards the stationary block 94. the Cam are moved vertically down when the hydraulic cylinder U4 is actuated to move the platform 111 in the downward direction. A pair of openings 143 are in the base plate 96 for receiving the cam II9 during their Movement formed downwards. A spring loaded support block 125 is for urging the cams towards block 104 intended.

The device according to the invention further comprises means for deforming the overlapping ends of the Metal plate to secure the overlapping ends together and a metal housing for the fire-resistant To provide bricks. In the preferred embodiment, this device comprises at least one penetration device, which is mounted so that it can be brought into engagement with the overlapping ends of the metal plate punch through the overlapping ends and form locking metal curls in the metal plate around the ends to attach to each other.

As shown in the embodiment in Fig. 6, 1st a puncture device 116 in one in block IO8 formed opening attached. As shown in Fig. 8, the punch has a pointed end II8, which

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is normally located in an opening formed in the pressure plate 106 when the operating platform 111 in its raised position as shown in FIG. When the operating platform 111 is moved down to To bring the pressure plate 106 into engagement with the ends of the metal plate 36, the pointed end II8 of the punch 116 is exposed to the overlapping ends of the metal plate when the pressure plate is relative to the block 108 is moved up and against the coil springs 110. The pointed end II8 of the punch device can so pierce the overlapping ends of the metal plate to prevent locking metal curls, as shown in Fig. 2, in the metal plate to form.

If the overlapping ends of the metal plate are attached to more are to be punctured as one point, the device can be provided with additional puncture devices similar to the puncture device 116. the Penetration devices can be attached in spaced apart openings formed in block I08 will be to a set of copies 44, as in Fig. 1 shown to produce.

In another embodiment of the device, the breakthrough devices of the second station by a Multiple welding heads are replaced. In operation of this apparatus, the overlapping ends of the metal plate 36 are joined together by a plurality of welded joints to secure the metal plate to the refractory brick 22.

In the preferred embodiment of the device according to the invention, a clamping device for holding the bent parts of the metal plate against the sides of the fire

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permanent brick provided if the protruding beyond the brick Parts of the metal plate are bent into contact with the top surface of the brick. As shown in the embodiment, this clamping device consists of one Pair of pressure blocks holding the bent parts of the metal plate on opposite sides of the fire resistant brick grasp to hold these bent pieces against the sides of the brick.

Like in Pig. 6, a first pressure block 120 is on the block via a pair of springs 122 and a lever 123 appropriate. The lever 123 is pivotable on the pressure block

120 and has a longitudinal slot 124 for receiving a pivot pin protruding from the block 94. The lever is provided to guide the movement of the pressure block 120 relative to the block 94. The block 94 has a recess 145 for receiving the pressure block 120.

In addition, a second pressure block 126 is over a pair Springs 128 and a lever 129 attached to the block 104. The lever 129 is pivotally attached to the pressure block 126 and has a longitudinal slot I30 for receiving a pivot protruding from the block 104. The lever is for guidance the movement of the pressure block 126 relative to the block 104 is provided. The block 104 has a recess I3I for receiving it of pressure block 126.

As shown in Figure 6, the springs 128 normally hold the pressure block 126 out of engagement with the recess

121 in block 104. Similarly, springs 122 normally hold pressure block 120 out of engagement with the recess 145 in block 94.

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The preferred embodiment of the device has further a guide device for arranging the metal plates in a predetermined position relative to the negative mold space ► According to FIGS. 3 and 4, the Guide device formed by a set of bearing pins 132, 134 and 136, which from one on the side of the stationary Molded part 56 attached plate I38 vertically protrude upwards. The location pins I32 and 134 touch the Edge of the end 38 of the metal plate 36, and the bearing pin 136 contacts the trailing edge of metal plate 36 to put the metal plate in a predetermined position relative to the negative Bringing mold space, which is formed by the stationary mold part 56 and the movable mold part 58.

The method of the invention will be understood by considering the operation of the apparatus illustrated in FIGS. 4-7 considered. In the process of attaching the metal plate to the fire-resistant brick, parts of the metal plate are made bent into contact with the outer surfaces of the brick, while other parts of the metal plate firmly against it The brick can be held to create a furnace brick in which a metal casing is firmly attached to the fire resistant Brick is connected.

According to the method of the invention, the refractory brick is placed on the metal plate in a position midway between the ends of the metal plate. Referring to Fig. 4, in the first station of the apparatus, the metal plate 36 is placed on the upper surfaces of the mold members 56 and 58, the support member 62 and the platform 80 with their edges in contact with the bearing pins 132, 134 and 136 are . The fire-resistant brick is then placed centrally on the metal plate 36 so that

ends 38 and 40 of the metal plate protrude on opposite sides of the refractory brick.

As mentioned above, it may be desirable to put a layer of asbestos material between the brick and the one from the Provide metal plate molded housing. In this case, a not shown flat layer of asbestos on the Metal plate 36 is arranged adjacent to the brick 22 on the plate.

According to the method of the invention, the parts of the metal plate on opposite sides of the fire-resistant brick bent in contact with the sides of the brick. Referring to Pig. 3 and 4 will Fluid under pressure is supplied to the hydraulic cylinder 73 via the hydraulic line 77, and a downwardly directed, The force indicated by the arrow 79 is exerted on the shaft 72. The shaft transmits the downward directed force on the element 70 for applying Pressure. This element exerts a downward pressure on the fire-resistant brick 22, which the fire-resistant brick, the metal plate and the platform 80 presses against the tension of the tension spring 84 downwards.

When the refractory brick, metal plate and platform 80 are moved downward, metal plate 36 and refractory brick 22 are moved into the negative mold space between mold parts 56 and 58. The metal plate 36 first engages the beveled surfaces 64 and 66 (Fig. 4) of the moldings and the ends 38 and 40 of the metal plate are partially bent into an upper position.

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During the continued movement of the refractory brick 22 and metal plate 36 into the negative mold space the movable molded part 58 is moved against the spring 60, to expand the size of the negative mold space and move the brick and metal plate down between the mold parts 56 and 58 to move. While the brick and move the metal plate down between the mold parts, the metal plate is bent into a U-shaped shape, which corresponds to the floor area and the sides of the fire-resistant brick. Since the movable molded part 58 against the stationary mold part 56 is biased by spring 60, the metal plate is related in a tight-fitting position bent on the fire-resistant brick.

The platform 80 holds under the action of the tension spring 84 the metal plate 36 during bending of the metal plate in Contact with the rare of the brick firmly against the ground surface of the fire-resistant brick. As the platform 80 moves downward, the tension exerted by the tension spring 84 decreases Force to hold the metal plate against the brick gradually increases. The effect of the platform 80 and the mold parts 56 and 58 ensures that the metal plate becomes a snug fit Metal casing for the fire-resistant brick is molded. Then the hydraulic cylinder 73 is connected to the hydraulic line 78 Fluid under pressure is supplied to the shaft 72 and the element 70 for applying pressure in its original Position as shown in Fig. 4 to bring back.

After the metal plate 36 is in a U-shaped shape according to the floor area and the rarity of the fire-resistant Brick 22 is bent, the partially shaped assembly of brick and metal plate is in the second station (Fig. 6) of the Device moves. In the second station, the bending of the metal plate in contact with the refractory brick is completed .

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According to the method according to the invention, the Portions of the metal plate which protrude beyond the fire retardant brick are bent into contact with the top surface of the brick so that the ends of the metal plate overlap. According to FIG. 6, in the second station of the device according to the invention, the partially shaped arrangement made of metal plate and refractory brick placed between blocks 94 and 104. The hydraulic cylinder 114 is operated to operate platform 111 as by the Arrow 117 indicated to move downwards * Initially, the control surfaces 121 of the cams I19 act against the control surface 105 of the block 104 to this block, as by the Arrow 103 indicated to the stationary block 94 towards move·

If block 104 is moved to block 94, will the pressure block 126 and the projecting end of the pivot arm 98 in contact with the upwardly bent portion of the plate 36 On the right side of the fire-resistant brick 22, as seen in SIg · 6, moved. When the movement of the Blocks 104 continues, the fire-resistant brick and U-shaped metal plate are moved to the left until the opposite upwardly bent part of the metal plate? 6 in singular engagement with the pressure block 120 and the protruding The end of the swing arm 88 comes.

At this time, the leftward force applied to the movable block 104 is given by the swing arm transferred to the metal plate 36. This force bends that End 40 of the metal plate partially towards the top surface of the fire retardant brick 22, as indicated by an arrow 140 in FIG. 6 is indicated. At the same time, the pressure block 126 applies a clamping force to the metal plate, to hold the metal plate against the right side of the fire-resistant brick 22 during the partial bending of the end 4o of the metal plate.

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A similar force is applied to the opposite upwardly bent portion of the metal plate 56 by the pivot arm 88. This force partially flexes the end 38 of the metal plate towards the upper surface of the fire-resistant brick " as indicated by an arrow 142 in FIG. 6. At the same time, the pressure block 120 applies a clamping force to the metal plate out to this while partially bending the end 38 of the metal plate firmly against the left side of the fire resistant To keep brick.

After both ends 38 and 40 partially to the top surface of the fire-resistant brick 22 are bent, continued movement of the operating platform 111 leads downward to that the pressure plate IO6 in engagement with the end 38 of the Metal plate is moved. After the pressure plate has come into engagement with this end of the metal plate, it causes further downward movement of the operating platform 111 that the pressure plate the ends 38 and 40 of the metal plate in Contact with the top surface of the fire-resistant brick 22 flexes.

During the final bending of ends 38 and 40 of FIGS Metal plate is first the recessed part 42 of the end 40 of the metal plate into the in the upper surface of the fire-resistant Brick formed longitudinal groove moved (Flg. 7). The end 38 of the metal plate is stepped into an overlapping position with the Part 42 of the metal plate moved down. Note that the metal plate 36 during completion the bending of their ends 38 and 40 by the pressure blocks 120 and 126 is held firmly against the sides of the fire retardant brick 22.

Finally, according to the inventive method the overlapping ends of the metal plate move towards each other b -

* 109842/1161 - ** -

solidifies to make a metal casing for the brick. According to a preferred method, the overlapping ends of the metal plate are deformed to a plurality of deformations in the metal plate, which hold the ends of the metal plate together mechanically. As in the exemplary embodiment shown, the deformations are created by breaking through the overlapping ends of the metal plate, to form interlocking metal curls in the metal plate, which mechanically firmly connect the ends of the metal plate to one another. As explained above, the metal curls are used further to attach the metal casing to the fire-resistant brick.

Referring to Fig. 7, when the ends 38 and 40 of the metal plate are bent into contact with the top surface of the refractory brick 22, the pressure plate 106 is moved upward relative to the block 108 and against the springs 110 about the overlapping ends of the metal plate to the pointed end II8 of the punch 116. Under the action of the downward forces applied to the operating platform 111 by the hydraulic cylinder 114, the pointed end of the piercing means pierces the overlapping ends of the metal plate and deforms the metal of the overlapping ends into the recess} 4 formed in the refractory brick.

As shown in FIG. 2, the deformation formed in the metal plate consists of metal curls that are in locking engagement with one another and protrude into the recess 34. Metal curls 46 and 48 are formed from the deformed metal of the ends 38 of the metal plate, and the deformed metal of the recessed portion 42 of the end 40 of the metal plate become metal curls 50 and 48

-27-

educated. The metal curls are in locking engagement with one another in order to produce a mechanically closed metal housing for the fire-resistant brick. Additionally attach the metal rolls, as they protrude into the recesses formed in the fire-resistant brick, too the metal housing on the fire-resistant brick and prevent the brick from sliding out of its metal housing during handling

As explained above, the device according to the invention can be provided with a plurality of perforations inriohtuhgen 116 when the overlapping ends of the metal plate should be broken through in “more than one place. Thus, a plurality of penetrations in the overlapping Ends of the metal plate in evenly spaced layers be formed with respect to each other to produce a furnace brick as shown in Pig * 1 with a tight-fitting metal housing.

When operating another embodiment of the device according to the invention, in which the second station has dowel heads instead of soling devices, the overlapping ends of the metal plate are connected to one another by SchwelSverblndungen.

In a preferred method according to the invention the fire-resistant brick has one in its upper surface " longitudinal groove formed and a plurality of in the longitudinal groove formed depressions for receiving the deformed metal curls of the punched through parts of the overlapping Ends of the metal plate. However, the preferred method of the invention can, if desired, be modified so that the desired stove brick is made of a fire-resistant brick which does not have such a groove or

has depressions. The modified method additionally includes the following steps: (1) Forming a longitudinal groove, which dch extends over the top surface of the brick, and (2) forming a plurality of recesses in the longitudinal groove.

The method according to the invention can also be used when the metal housing for the fire-resistant brick is formed metal plate used does not have a preformed heel at one of its ends, include the step of having a heel longitudinally one end of the metal plate is formed, which is received in the longitudinal groove of the fire-resistant brick when the Metal plate is bent into contact with the top surface of the brick.

Furthermore, the device according to the invention can be modified in accordance with the principles of the invention to include a metal housing for making a fire-resistant brick which is not rectangular in shape. In this case, the molded parts of the device are designed so that they correspond to the outer surface of the brick "

The invention thus creates a furnace brick made of a fire-resistant one Brick and a metal housing firmly attached to the brick. The metal housing is made from a single metal plate formed with overlapping ends, which are mechanically firmly connected to each other. The metal plate is wider mechanically attached to the brick. In the method according to the invention and the device according to the invention is an automatic Compensation for inconsistent sizes of the refractory bricks that receive the metal casing is provided. This compensation is made automatically in the method according to the invention by using the fire-resistant brick achieved as a positive molded part or as a male mold. As a result, according to the method according to the invention and with the Furnace stone manufactured according to the invention has a tight-fitting metal housing.

109S82 / 116S ~ ²⁹ "

Briefly summarized, the invention comprises a refractory brick having a metal casing. When building the Furnace stones are overlapping ends of a metal plate in a longitudinal groove formed along one surface of the brick attached to each other to form a metal casing for the brick. One end of the metal plate has a shoulder, which is received by the longitudinal groove. The overlapping ends of the metal plate are pierced or welded for fastening the overlapping ends together and for fastening the metal plate to the brick together. According to the method according to the invention for attaching a metal plate to a fire-resistant brick, the brick disposed on a surface of the metal plate in a position between the ends of the metal plate, and the ends of the metal plate are bent using the brick as a positive shape in contact with the sides of the brick. While When bending, the metal plate is held firmly against the bottom surface of the brick. Then the parts of the metal plate, which protrude beyond the top surface of the brick, bent into contact with the top surface, with the ends the metal plate overlap, while the previously bent parts of the metal plate tightly against the rare of the brick being held. Finally, the overlapping ends of the metal plate are firmly bonded together to form a metal housing to surrender for the brick. The device according to the invention for the production of bricks with a metal housing is constructed accordingly.

The breadth of the invention is not restricted to the details shown and described in detail Modifications in the details of the embodiments shown and described can be made without departing from to depart from the principles of the invention.

-30- 109882/1185

Claims (1)

Claims 1. Method of attaching a metal plate to a fire-resistant one Brick «characterized by the fact that the brick on the metal plate is in a position in the middle placed between the ends of the metal plate, the parts of the located on the opposite sides of the brick Metal plate bent into contact with the sides of the brick, the parts of the metal plate protruding beyond the brick in contact with the top surface of the brick to overlap the ends of the metal plate and bent the overlapping ends of the metal plate are attached to each other to create a metal housing for the brick. 2. The method according to claim 1, characterized in that that the metal plate firmly against the brick in contact with the sides of the seal during the bending of the metal plate is held and the bent parts of the metal plate during the bending of the metal plate in contact with the upper surface of the brick held firmly against the sides of the brick, 5. The method according to claim 1 or 2, characterized in that the overlapping ends of the metal plate by deforming to produce a plurality of deformations in the metal plate for mechanically fastening the ends of the metal plate together. 4. The method according to claim 2, characterized in that that deforming the overlapping ends of the metal plate by piercing the overlapping ends to form Metal curls in locking engagement with each other for mechanical Fixing the ends together is carried out. -51- 109882/1168 5. The method according to any one of claims 1 to 4, characterized in that that a longitudinal groove is formed along the upper surface of the brick and a shoulder is formed along it one end of the metal plate to be received in the longitudinal groove of the brick when the metal plate is bent into contact with the upper surface of the brick is formed. 6. The method according to claim 5, characterized in that that a plurality of depressions is formed in the longitudinal groove of the brick and the overlapping ends of the Metal plate for creating a plurality of deformations in the metal plate, which protrude into the recesses in the brick and mechanically attach the metal plate to the brick, be deformed. 7. The method according to claim 6, characterized in that the deformation of the overlapping ends of the metal plate by piercing the overlapping ends of the metal plate takes place at a plurality of spaced apart locations, which correspond to the depressions in the brick to in the locking Engaging metal rolls in the overlapping ones Form ends which are used for mechanical fastening of the overlapping Ends together and protrude into the recesses for fastening the metal plate to the brick. 8. Method of forming a metal casing for a fire-resistant one Brick made from a metal plate according to one of the preceding claims, characterized in that that the bottom surface of the brick as a positive shape against the metal plate and into a negative mold space for bending the metal plate is pressed into contact with the sides of the brick, the ends of the metal plate, which overlie the top surface stick out of the brick, in contact with the upper surface -32- 109882/1165 and overlapping parts of the metal plate are fastened together to create the metal housing for the brick will. 9. The method according to claim 8, characterized in that that the metal plate during the movement of the metal plate and the brick in the negative mold space and during the bending of the metal plate in contact with the sides of the brick is firmly held against the bottom surface of the brick and the bent parts of the metal plate during bending of the metal plate in contact with the top surface of the brick be held firmly against the sides of the brick. 10. A method for inserting a fire-resistant brick into a metal housing, characterized in that i chnet a longitudinal groove is formed along one surface of the refractory brick, a shoulder along one end a metal plate is formed to be received in the longitudinal groove of the brick which is opposite to the longitudinal groove Surface of the brick is placed in the middle of the metal plate, those on opposite sides of the brick Parts of the metal plate in contact with the sides of the brick to create a U-shaped plate around the brick be bent over the brick surface with the longitudinal groove protruding parts of the metal plate in contact with this surface for moving the heel in the longitudinal groove and bent to overlap the other end of the metal plate with the shoulder and the overlapping ends of the metal plate at the groove to create the metal housing for the brick. 11. The method according to claim 10, characterized in that a plurality of depressions in the Longitudinal groove of the fire-resistant brick can be formed -25- 109882/1165 and the overlapping ends of the metal plate are deformed into a plurality of deformations which enter the recesses protrude and connect the ends of the metal plate to each other and the metal plate to the brick. 12. Furnace brick with a brick made of fire-resistant material with an outer surface, characterized in that that a metal plate (j6) corresponding to the outer surface (24, 26, 28, 30) of the brick (22) to form a metal housing for the brick is laid around this, the opposite ends (38th, 40) of the metal plate (36) from each other overlap on the outer surface (26) of the brick (22), and fastening means (44) for mechanical fastening the overlapping ends (38, 40) of the metal plate (36) to one another and for fastening the metal housing to the brick (22) are provided. 13 Oven stone according to claim 12, characterized in that that the fastening means consist of at least one deformation (44) which in the overlapping ends (38, 40) the metal plate (36) for fastening the overlapping ends one to the other and for engagement with the brick (22) for securing the metal housing to the brick. 14. Oven brick according to claim 12 or I3, characterized in that that the brick (22) of fire-resistant material has a plurality of outer surfaces (24, 26, 28, 30) and a longitudinal groove (32) is formed along one of the outer surfaces (26) and the metal plate (36) denotes outer surfaces (24, 26, 28, 30) of the brick is correspondingly shaped, with their opposite ends (38, 40) overlap in the longitudinal groove (32). -34- 109882/1165 15. Furnace brick according to claim 14, characterized in that that the fastening means are formed from a plurality in the overlapping ends (38, 40) of the metal plate (36) Deformations (44) for securing the overlapping ends together and for engaging the tile (22) for securing of the metal housing on the brick. 16.Ofenstein according to claim I5, characterized in that that the brick has a plurality of depressions (34) in the longitudinal groove (32) and in the overlapping ends (38, 40) of the metal plate (36) formed deformations (44) protrude into the recesses (34) and the metal plate (36) mechanically hold the brick (22). 17 Oven stone according to claim 14, 15 or 16, characterized thereby, that at one end (40) of the metal plate (36) a shoulder (42) is formed, which to create a substantially flat outer surface for the metal housing on the longitudinal edge (32) is included in this. 18. Oven stone according to claim 17 * characterized in that that the brick converges in the form and the longitudinal groove is arranged centrally on a surface of the brick. 19. Composite furnace brick, characterized in that a brick (22) made of fire-resistant material has at least one recess in its outer surface, a metal housing for the brick (22) is provided, which consists of a metal plate (36) which is the surface of the Brick is shaped accordingly and the opposite ends (38, 40) of which overlap each other at the recess , and fastening means are provided on the overlapping ends (38, 40) of the metal plate (36) and protrude into the recess in order to prevent the overlapping -35-109882 / 1165 joining the ends of the metal plate and mechanically attaching the metal plate (36) to the brick (22). 20. Composite furnace stone according to claim 19 «characterized in that that the brick has a plurality of depressions (34) which in one of its surfaces (26) and aligned along the surface and the fastening means of a plurality of in the overlapping Ends (58, 4o) of the metal plate (36) are formed deformations (44) which protrude into the recess (34) and mechanically securely connect the metal plate (36) to the brick (22). 21. Composed furnace stone according to claim I9, characterized in that the recess has a longitudinal groove (32) is in the surface (26) of the brick (22) and one of the ends (40) of the metal plate (36) has a stepped portion (42) which to provide a substantially flat outer surface of the metal housing is received on the longitudinal groove (32) in the longitudinal groove. 22. Compound furnace brick according to claim 21, characterized in that the fastening means have a plurality of welded joints between the overlapping ends (38, 40) of the metal plate (36). 23. Device for attaching a metal plate to a fire-resistant one Bricks, characterized in that the device has a structure (56, 58) for forming a negative Having mold space, means (70) for pressing the bottom surface (24) of the fire-resistant brick (22) against the Metal plate (36) and for moving the brick and metal plate into the negative mold space to bend the metal plate (36) in contact with the sides (28, 30) of the brick -36- 109882/1165 see is a device (88, 98 * 106) for bending the parts of the metal plate (34) protruding upwards over the brick (22) in contact with the upper surface (26) of the Brick for overlapping the ends (58, 40) of the metal plate is arranged in the device, and means (116) for deforming the overlapping ends (58, 40) the metal plate (36) to attach the overlapping ends to one another and to create a metal housing for the fire-resistant brick (22) is provided. 24. The device according to claim 23, characterized in that the forming the negative mold space Structure a first stationary mold part (56), a second relative to the stationary mold part (56) movable and molded part (58) arranged at a distance from this to form an opening for receiving the metal plate (36) and the fire resistant brick (22) and a biasing means (60) for pressing the second mold part (58) towards the first Has molded part (56) out. 25. The device according to claim 24, characterized in that the first and second mold parts (56, 58) each have a first beveled surface (64, 66) for engagement with parts of the metal plate (36) on opposite sides of the brick (22) for partial bending of these parts to the sides (28, 30) of the brick during the initial movement of the brick into the negative mold space and a second surface (68, 69) each for engagement with these parts of the metal plate (36) during further movement of the Brick (22) in the negative mold space for bending the metal plate (36) into contact with the sides (28, 30) of the brick. -37- 109882/1165 26. Device according to one of claims 23 to 25, characterized gekennzei chnet that means for holding the metal plate (36) against the bottom surface (24) of the fire-resistant Brick (22) in the form of a normally extended position relative to the negative mold space Platform mounted movably in the negative mold space (80) is provided in a biasing device (84) by which the platform (80) in its normally extended The position is durable and the platform (80) can be supplied with an increasing force when the brick (22) and the metal plate (36) are moved into the negative mold space to hold the metal plate (36) firmly against the bottom surface (24) of the brick to hold. 27. Device according to one of claims 23 to 26, characterized characterized in that the device for bending the parts of the metal plate (36) protruding beyond the brick (22) in contact with the upper surface (26) of the brick a first pivot arm (88) for engaging part of the metal plate (36) to partially flex it towards the upper one Face (26) of the brick, a second pivot arm (98) for engagement with the other part of the metal plate (36) for its partial bending towards the upper surface (26) of the brick and a pressure plate (106) which for Bending the partially bent portions of the metal plate (36) into engagement with the top surface (26) of the brick is movable with these parts. 28. Device according to one of claims 23 to 27, characterized in that the device for deforming of the overlapping ends (38, 40) of the metal plate (36) comprises at least one piercing device (II6) which with the overlapping ends (28, 40) of the metal plate (36) 109382/116 6 for punching through the overlapping ends to form in locking engagement with one another metal curls (46, 48, 50, 52) in the metal plate (36) for Attaching the ends (38, 40) to one another for movement into engagement is. 29. Device according to one of claims 23 to 28, characterized in that a device (70) for Holding the metal plate (36) against the bottom surface (24) of the fire retardant brick (22) while the brick is moving (22) and the metal plate (36) in the negative mold space and a clamping device (120, 126) for holding the bent parts of the metal plate (36) against the sides (28, 30) of the fire-resistant brick (22) when the over the Brick protruding parts of the metal plate in contact with the upper surface (26) of the fire-resistant brick be bent, are provided. 30. Device according to one of claims 23 to 29, characterized in that guide devices (I32, 134, I36) for arranging the metal plate (36) in a predetermined Position relative to the negative mold space are provided. 31. Apparatus according to claim 29, characterized in that the clamping means for holding the bent parts of the metal plate (36) against the sides (28, 30) of the fire-resistant brick (22) have a pair of pressure blocks (120, 126) for engagement with the curved portions of the metal sheet (36) on opposite sides of the fire resistant brick (22) for holding the curved portions against the sides (28, 30) of the brick. -39-1098Ö2 / 116S 32. Device for forming a metal housing for a fire-resistant brick from a metal plate, thereby marking cn net that it includes a (a) first station with (1) a movable platform (80) for supporting the metal plate (36) and the fire-resistant brick (22) and for holding the metal plate against the bottom surface (24) of the fire-resistant brick, (2) first and second spaced-apart mold parts (56, 58) for forming an opening for receiving the movable platform (80) with surfaces (64, 6, 68, 69) for bending the opposite sides of the brick (22 ) located parts of the metal plate (56) in contact with opposite sides (28, 30) of the brick, and (3) an element (70) for applying pressure for the Engaging the top surface (26) of the refractory brick (22) to move the brick, the metal plate and the platform in contact between the first and second mold parts and for bending the metal plate with the rarities of the brick, and (B) a second station with (1) a clamp (120, 126) for holding the bent parts of the metal plate (36) against the sides (28, 30) of the brick, (2) first and second pivot arms (88, 98) which are adapted for engagement with the over the fire resistant brick -40 * 109802/1166 (22) protruding ends of the metal plate (36) are movably attached to partially bend the ends of the metal plate towards the upper surface (26) of the brick. (3) a pressure plate (I06) movable into engagement with the partially bent ends of the metal plate (36) for Bending the ends into contact with the top surface (26) of the brick and overlapping the ends (38, 40) the metal plate, and (4) a device (II6) for breaking through the overlapping Ends (38, 40) of the metal plate (36) for forming in locking engagement with one another Metal curls (48, 50, 52, 54) in the metal plate (36) for fastening the overlapping ends (38, 40) to one another and for creating a metal housing for the brick (22), which is mechanically firmly connected to the brick. 33. Apparatus according to claim 32, characterized in that it has a movable operating platform (111) for supporting the pressure plate (I06) and resilient means (110) for connecting the pressure plate (I06) to the operating platform (111) and allowing relative movement between the pressure plate and the operating platform, and that the device for penetration comprises at least one penetration device (116) which is attached to the operating platform (111) is and a pointed end (II8) for piercing the overlapping Contains ends (38, 4o) of the metal plate (30), the pressure plate (1θβ) an opening for receiving the pointed end (138) of the breakdown device (116) and the fe- -41- iüSii82 / 116S changing means (110) the pressure plate (106) in a normally extended position relative to the operating platform (111) for holding the pointed end (118) of the puncturing device (116) in a concealed position in the opening in the pressure plate (lo6) and when moving the pressure plate (106) against the resilient means (110) when the pressure plate (106) is in engagement with the overlapping ends (38, 40) of the metal plate (36) moved, releasing the pointed end (II8) for penetration the overlapping ends (38, 40) allows. 109882/1 165