DE102007034777A1 - Method and device for cross-cutting an aerated concrete block - Google Patents

Abstract

The method involves supporting cutting wires extending horizontal to a carrying element and transverse to longitudinal extension of a porous concrete block, where the cutting wires are stretched gate-like in longitudinal direction of the block. The wires are distributed on a predetermined distance from each other in a rectangular cutting frame (12). The wires are pulled by the block, where the frame with the wires is pivotable diagonally upwards around a horizontal axis running parallel to the extension of the block during cutting. The wires are pulled in the inclination by the block. An independent claim is also included for a device for cross cutting a cuboidal, still plastic porous concrete block.

Description

The The invention relates to a method and a device for cross-cutting a green, still plastic, not hardened cuboid, in a cross cutting station on horizontal lying parallel at a distance juxtaposed grate bars, z. B. 6 m long aerated concrete block, in cuboid porous concrete body.

A cross cutting station of the type according to the invention is z. B. in the DE 195 15 757 C1 recognizable. The grate bars are supported laterally immovably on crossbar bars of a grate carrier frame or on crossbar shafts extending horizontally and at right angles to the grate bars and spaced from each other, wherein on the crossbar shafts rotatable spacer rollers sit on which the grate bars loosely and laterally immovable store ( AT-PS 65 954 . DE-AS 12 74 947 ).

The Cross cutting station has a horizontally arranged, quadrangular Cutting frame on, in the interior space at a distance from each other itself parallel to each other and at right angles to the grate bars extending cutting wires are stretched. The cutting frame is in its corners on stationary vertical columns guided in vertical guides. drive means allow the raising and lowering of the cutting frame to the Columns. To reduce the cutting forces is provided that the cutting wires during startup of the cutting frame oscillating in its longitudinal extent Perform floats, so not only pushing, but also pulling is cut. That's what the wires are for arranged tensioned between horizontal beams, which rotate around their longitudinal axis are arranged in the cutting frame and with corresponding drives in pendulum movements about their longitudinal axis be offset. These are expediently two parallel to each other on each side of the cutting frame arranged beams provided, the opposite pendulum are driven, with adjacent wires not on the same Beams are arranged so that adjacent wires are counter-rotating Carry out cutting movements.

adversely is that the cutting wires that are pulling through through the aerated concrete body bend down, the Spring back leaving the aerated concrete block elastic and spring back while larger fragments from the surface of the aerated concrete block that is too useless Aerated concrete bodies and thus lead to rejects can.

task The invention is characterized by the spring-back of the cutting wires When leaving the aerated concrete block caused to avoid rejects.

These The object is solved by the features of claims 1 and 8. Advantageous developments of the invention are in the of these Claims dependent claims characterized.

The The invention thus provides a method for cross-cutting a cuboid, still plastic aerated concrete block, the horizontal on one planar support element and transversely to the longitudinal extent of the Superabsorbent block extending cutting wires stored. The Cutting wires are in a rectangular cutting frame like a gate, in the longitudinal direction of the aerated concrete block stretched determined distance apart. The cutting frame is used for cutting from bottom to top, with the cutting wires be pulled through the aerated concrete block. While cutting the cutting frame is together with the cutting wires around a running parallel to the longitudinal extent of the cellular concrete horizontal axis pivoted obliquely upwards, so that the cutting wires in an inclined position be pulled the aerated concrete block. It is advantageous if the cutting frame only after reaching half the height of the aerated concrete block is pivoted.

Conveniently, The cutting frame is placed around one in the area of one of its two horizontal Longitudinal beam provided axis pivoted. Especially is advantageous if the cutting wires during cutting in the cutting frame with corresponding drive means in a reciprocating motion or pendulum movement in the direction of her Extension to be offset, with the frequency of the reciprocating motion z. B. to 300, in particular between 2 and 15, preferably between 3 and 8 hertz lies.

An apparatus according to the invention for carrying out the method according to the invention has a horizontal foundation bed supported by the porous concrete block and a rectangular cutting frame which encompasses the cutting bed and comprises two longitudinal beams and two transverse beams. Within the cutting frame, cutting wires are tensioned above the cutting bed in a gap-like manner parallel to the transverse bars at a lateral spacing. In addition, the cutting frame with lifting devices is guided on and abfahrbahr on a fundamentabgestützten support member with guide elements, wherein the cutting frame is arranged together with the cutting wires about a horizontal, parallel to one of the longitudinal beams pivot axis pivotally mounted on the support elements. Conveniently, the pivot axis in the region of a longitudinal beam in hinged connecting elements between the longitudinal beam and the longitudinal beam adjacent arranged th support elements, wherein the connecting elements are guided vertically in the support elements for the raising and lowering of the cutting frame. In this case, according to an embodiment of the invention, guide elements between the other longitudinal beam and the supporting elements adjacent thereto are dispensed with. In particular, it is advantageous if the cutting wires within the cutting frame with corresponding drive means in the direction of their displacement are arranged to move back and forth and each adjacent cutting wires can move back and forth in opposite directions.

To a particular embodiment of the invention, the Tragelemente four fundamentabgestützte lifting devices on, one of each below a corner of the cutting frame is arranged tightly, wherein the lifting devices on the one Longitudinal side of the cutting frame independent of the Lifting devices of the other longitudinal side operable are. Appropriately, stands on a long side the cutting frame outside the two corner areas depending a vertical foundation-based column element, being between the column elements and the cutting frame vertical guide means with a hinged Joint device with horizontal pivot axis for the Pivoting the cutting frame are arranged. Is advantageous if each lifting device at least on one longitudinal side, preferably but on both sides of the cross-cutting device on the foundation side and cutting frame side each one effective when pivoting the cutting frame Having joint.

Based of the drawings, the invention will be exemplified in the following explained. Show it:

1 a perspective view of a complete cutting system for aerated concrete blocks obliquely from above,

2 a perspective front view of a first embodiment of a cross-cutting device according to the invention,

3 an enlarged front view of a portion of the inventive cross-cutting device according to 2 .

4 a front perspective view of the cross-cutting device according to 2 diagonally from above,

5 a perspective rear view of the cross cutting device according to 2 diagonally from above,

6 a perspective view of the front interior of the cross cutting device according to 2 .

7 a perspective front view of another embodiment of a cross-cutting device according to the invention obliquely from above,

8th a rear perspective view of the cross cutting device according to claim 7 during cutting obliquely from above,

9 a perspective view into the front-side interior of the transverse cutting device according to claim 7,

10 a rear perspective view of the cross cutting device according to claim 7 after cutting obliquely from above,

11 schematically an end view of the cross-cutting device with an articulated pivoting device for the cutting frame.

The transverse cutting device according to the invention 1 for cross-cutting an aerated concrete block 2 can be the sub-station of an autoclaved concrete cutting plant 3 be, which also has a bumper 4 and a slitting station 5 having ( 1 ).

The cross cutting station 1 takes a block-shaped aerated concrete block 2 on, the two ends 6 , two narrow sides 7 and two broadsides 8th having. The aerated concrete block lies horizontally with a broadside 8th in a manner known per se, for example, arranged on a distance parallel to each other and parallel to the longitudinal extent of the porous concrete block parallel and horizontally spaced, forming a cutting bed grate bars 9 on ( 3 ) by a foundation base 10 be worn.

On the grate bars 9 sit at right angles and horizontally extending, arranged at a certain distance from each other cutting wires 11 on ( 3 ). The cutting wires 11 are part of a rectangular cutting frame 12 consisting essentially of two longitudinal beams 13 . 14 and two crossbeams 15 . 16 exists, with the crossbars 15 . 16 Appropriately on the end portions of the longitudinal beams 13 . 14 are set up.

Adjacent and parallel to the longitudinal beams 13 . 14 In each case two wire carrier shafts extend inside the frame 17 . 18 , which rotates in below the transom 15 . 16 fixed bearing blocks 19 to store.

Between the wire carrier shafts 17 . 18 are the cutting wires 11 looking forward to being one cutting wire 11 between an outer wire carrier shaft 17 and the one on the other side of the cutting frame 12 arranged inner wire carrier shaft 18 and the adjacent cutting wire 11 between an inner wire carrier shaft 18 and the one on the other side of the cutting frame 12 arranged outer wire carrier shaft 17 are curious.

The wire carrier shafts 17 . 18 be with a z. B. on the crossbar 16 seated engine, z. B. geared motor 20 , via crank rods 21 driven reciprocatingly about its longitudinal axis, in such a way that in each case an outer shaft 17 with the inner shaft arranged on the other side of the frame 18 form a jointly driven simultaneously shaft pair and the shaft pairs are driven in opposite directions pendulum. In this way, a pulling cut can be guaranteed.

The cutting frame 12 is pulled upwards and suspended downwardly lowered in a fundamentfesten frame construction, z. B. consisting of four outside in the region of the corners of the cutting frame 12 foundation-fixed columns 22 , Wherein on the front sides or transverse sides of the cross cutting station 1 the columns 22 on the head side with horizontal crossbeams 24 are braced and at least on one longitudinal side of the cross cutting station 1 the support columns 22 on the head side with a horizontal longitudinal beam 23 can be brave. For the guidance of the cutting frame 12 in the up and down movement are vertical guide elements, preferably only on one longitudinal side, z. B. at the with the longitudinal beam 23 braced columns 22 and the cutting frame corner areas provided, the joints and the cutting frame 12 connect to the frame construction or support pillars.

For this purpose, for example, a vertical guide device, for. B. a vertical guide rail or guide 50 on the accessory side pillars 22 provided, wherein in each case in the guide groove or the guide rail a slider 51 is guided. On the slider 51 is a horizontal parallel to the longitudinal beam 14 lying axis 53 swiveling a connecting bridge 52 hinged, with the longitudinal beam 14 is in firm connection. In the area of the longitudinal beam 13 is how in 11 recognizable, no guidance device on the columns 22 intended.

The cutting frame 12 depends in its corners on there vertical, in particular deflectable tension elements such. B. on guided chains or ropes 25 . 26 or similar. The ropes 25 each run vertically from the longitudinal beam 13 and the ropes 26 each vertically from the longitudinal beam 14 up.

The vertical leading sections of the ropes 25 are each by the crossbar 24 passed on one on the transom 24 mounted deflection pulley 27 and 90 ° parallel to the crossbeam 24 extending deflected to another deflection roller 28 at the other end of the crossbeam 24 is arranged on the crossbar. From the pulleys 28 be the ropes 25 vertically down and parallel to the column 22 running led to each a towing device 29 , which is attached to a foundation base.

The vertical leading sections of the ropes 26 are also each by the crossbar 24 passed on a mounted on the crossbar pulley 30 and also at 90 ° parallel to the crossbeam 24 extending deflected to another deflection roller 31 from which the ropes 26 vertically downwards to the same drawbar 29 be guided. With the drawbar 29 can the cutting frame 12 over the ropes 25 . 26 be moved up and down.

Conveniently, arranged on the one transverse side rollers 31 and 28 with the roles 31 and 28 on the other transverse side of the cutting frame 12 over a wave 32 in conjunction, synchronizing the ropes 25 . 26 guaranteed on both sides.

According to the invention, the cutting frame 12 on the longitudinal side of the accessory on one side, parallel to the longitudinal beam 14 extending horizontal axis tiltable or pivotally arranged, with the ropes 25 the cutting frame in the direction of the arrow 33 tilted upwards and counter to the direction of the arrow 33 can be lowered again ( 4 ). It can be z. B. in each case the drawbar 29 the rope 25 in comparison to the rope 26 pull up at a higher speed.

Alternatively, however, as shown, a lifting device 44 be provided, which is on the frame part 24 supported and with the displaceable arranged in this case roller 27 communicates. The lifting device 44 can the role 27 lift or move forward, resulting in a lifting or tilting of the frame 12 is effected.

According to the invention, an aerated concrete block 2 on the cutting bed consisting of the grate bars 9 and the cross-cut wires 11 with a broadside 8th placed. Then the pendulum movement of the cutting wires with the geared motor 20 initiated and the cutting frame 12 with the drawbars 29 on the ropes 25 . 26 pulled up. In this case, the inclination or the tilting of the cutting frame 12 immediately or during cutting, before the cutting wires 11 the aerated concrete block 2 leave, so that the cutting wires 11 first at the side of the longitudinal beam 13 from the aerated concrete block 2 come out while they are on the other side of the longitudinal beam 14 still in the aerated concrete block 2 are located. Thus, the kerf on the surface of the aerated concrete block travels from one corner to the other corner. ( 6 ). In this way, it is possible to almost obliquely stretched wires and thus relatively stress-free gradually or not at the same time at both ends or with their full length from the porous concrete block, thereby tearing out chunks of material or fragments can be avoided. The angle of inclination with respect to the horizontal depends on the material composition or the cuttability of the cellular concrete material. It is preferably below 20 ° and z. B. between 5 and 10 °, in particular between 6 and 8 °. Likewise, the pendulum speed is based on the composition of the material of the aerated concrete block.

The acceleration speed of the cutting frame 12 Finally, it also depends on the material composition of the aerated concrete block. It is preferably 0.01 to 0.03 m / sec, in particular 0.015 to 0.02 m / sec.

According to a particular embodiment of the cross-cutting device according to the invention, which in the 7 to 10 is shown, the cutting frame stores 12 who with the basis of the 1 to 6 described cutting frame 12 coincides in its four corners on each of a fundamentabgestützten, z. B. the longitudinal beams 13 . 14 under cross-lifting 40 that z. B. can be operated mechanically or pneumatically or hydraulically and expediently has a piston-cylinder unit.

It is also outside the cutting frame 12 each in the corner z. B. a longitudinal beam, z. B. of the longitudinal beam 14 a vertical foundation supported column 41 , Between the columns 41 and the longitudinal beam 14 or the crossbeam 15 . 16 (not shown) is in each case a guide device 42 for a vertical guidance of the cutting frame 12 on or in the support columns 41 which is a joint device 43 having, wherein the hinge means about a horizontal, parallel to the longitudinal beam 14 arranged axis can hinge. In addition, the lifting devices 40 that the cutting frame 12 wear and z. B. the longitudinal beams 13 . 14 support, cutting frame side, z. B. longitudinal beam side each have a hinge device (not shown), so that the angle between the cutting frame 12 or between the plane of the cutting frame and the longitudinal extension of the lifting devices 40 is changeable. Appropriately, the lifting devices 40 holding the longitudinal beams 13 on the support pillars 41 opposite side of the cutting frame 12 support, also a fundamental z. B. same hinge device (not shown).

With the lifting devices 40 placed on one longitudinal side of the cutting frame 12 regardless of those on the other side are operable, the cutting frame 12 be driven up and down, with the cutting frame 12 with the guide device 42 at the columns 41 to be led. In this case, the lifting devices 40 under the longitudinal beam 13 be driven higher, so the cutting frame 12 tilted upwards, passing around the axis of the hinge devices 43 pivots and the hinge devices between the lifting devices 40 and the cutting frame 12 and the foundation-side hinge devices of the lifting devices 40 hinges.

It is within the scope of the invention instead of the described lifting device with ropes or chains, crane-like equipment or hydraulic or to use pneumatic piston cylinder drives.

QUOTES INCLUDE IN THE DESCRIPTION

This list The documents listed by the applicant have been automated generated and is solely for better information recorded by the reader. The list is not part of the German Patent or utility model application. The DPMA takes over no liability for any errors or omissions.

Cited patent literature

• - DE 19515757 C1 [0002]
• AT 65954 [0002]
• - DE 1274947 [0002]

Claims (20)

A method for cross-cutting a cuboid, still plastic porous concrete block, which horizontally on a flat support member and transversely to the longitudinal extent of the porous concrete block extending cutting wires, wherein the cutting wires in a rectangular cutting frame like a like in the longitudinal direction of the aerated concrete block at a certain distance spread apart and the cutting frame to Cutting is moved from bottom to top, wherein the cutting wires are pulled through the porous concrete block, characterized in that during cutting of the cutting frame with the cutting wires is pivoted about an axis parallel to the longitudinal extent of the porous concrete block horizontal axis obliquely upward and the cutting wires in the skew be pulled through the aerated concrete block. Method according to claim 1, characterized in that that the cutting frame only after reaching half the height of the porous concrete block is pivoted. Method according to claim 1 and / or 2, characterized the cutting frame around one in the area of one of its two horizontal longitudinal beams pivoted axis is pivoted. Method according to one or more of the claims 1 to 3, characterized in that the cutting wires during cutting in the cutting frame with drive means put in a reciprocating motion in the direction of their extension become. Method according to claim 4, characterized in that that the frequency of the reciprocating motion is below 15, in particular between 3 and 8 hertz. Method according to claim 4 and / or 5, characterized that each adjacent cutting wires are in opposite directions to move back and fourth. Method according to one or more of the claims 1 to 6, characterized in that the aerated concrete block on a Broadside is cut lying down. Device for cross cutting a block-shaped still plastic porous concrete block, in particular for carrying out the method according to one or more of claims 1 to 7 with a) a horizontal, the aerated concrete block overlapping, grundabgestützten cutting bed, b) a rectangular, the cutting bed embracing two longitudinal beams ( 13 . 14 ) and two crossbeams ( 15 . 16 ) having cutting frame ( 12 ), where c) within the cutting frame ( 12 ) like a gate parallel to the cross bars ( 15 . 16 ) on lateral spacing cutting wires ( 11 ) are stretched above the cutting bed, and d) the cutting frame ( 12 ) is guided with lifting devices on and off mobile on fundamentabgestützt support elements with guide elements, characterized in that the cutting frame ( 12 ) together with the cutting wires ( 11 ) each one horizontal parallel to the longitudinal beams ( 13 . 14 ) extending pivot axis is pivotally mounted on the support elements. Apparatus according to claim 8, characterized in that only one pivot axis ( 53 ) in the area of a longitudinal beam ( 13 or 14 ) is provided, wherein preferably in the region of the other longitudinal beam ( 14 or 13 ) between the cutting frame ( 12 ) and the support elements no guide elements are provided. Device according to claim 7 and / or 8, characterized in that the cutting wires ( 11 ) within the cutting frame ( 12 ) are arranged with drive means in the direction of their extension back and forth movable. Apparatus according to claim 10, characterized in that in each case adjacent cutting wires ( 11 ) are arranged reciprocally moving back and forth. Apparatus according to claim 11, characterized in that the drive means each two pairs adjacent and each parallel to a longitudinal beam ( 13 . 14 ) extending in the region of the transom ( 15 . 16 ) rotatably supporting wire carrier shafts ( 17 . 18 ), wherein between the wire carrier shafts ( 17 . 18 ) the cutting wires ( 11 ) are tensioned by a cutting wire ( 11 ) between the outer wire carrier shaft ( 17 ) on one side of the longitudinal beam ( 13 ) and the inner wire carrier shaft ( 18 ) on the side of the longitudinal beam ( 14 ) and the respective adjacent cutting wire ( 11 ) between the inner wire carrier shaft ( 18 ) on one side of the longitudinal beam ( 13 ) and the outer wire carrier shaft ( 17 ) on the other side of the longitudinal beam ( 14 ) and the wire carrier shafts ( 17 . 18 ) Motor z. B. with a z. B. on the cutting frame ( 12 ) arranged motor drive ( 20 ) via cutting frame supported crank rods ( 21 ) are reciprocally driven to and fro about their longitudinal axis. Device according to one or more of claims 8 to 12, characterized in that the supporting elements of the cutting frame ( 12 ) four outsides, foundation-fixed support columns ( 22 ), which preferably at least on one longitudinal side of the cross-cutting device with a horizontal longitudinal beam ( 23 ) and at the end faces of the cross-cutting device with horizontal crossbars ( 24 ) are braced, wherein the lifting devices are in communication with the support elements. Apparatus according to claim 13, characterized in that the lifting devices in each case in the corner regions of the cutting frame ( 12 ) paired tension elements such as ropes ( 25 and 26 ) or chains, the cables ( 25 ) each vertically above the longitudinal beam ( 13 ) and the ropes ( 26 ) each vertically above the longitudinal beam ( 14 ), the ropes ( 25 ) each by the crossbar ( 24 ), on one on the crossbeam ( 24 ) mounted pulley ( 27 ) at 90 ° parallel to the crossbeam ( 24 ) are deflected to a further deflection roller ( 28 ) at the other end of the crossbeam ( 24 ) is arranged on the transverse bar, wherein of the deflection roller ( 28 ) the rope ( 25 ) vertically downwards and parallel to the column ( 22 ) is guided to a traction device ( 29 ), which is attached to a foundation base, and wherein the rope ( 26 ) also by the transverse bar ( 24 ) is passed on one on the crossbeam ( 24 ) mounted pulley ( 30 ) and there is also deflected by 90 ° and then parallel to the crossbar ( 24 ) extending to a further deflection roller ( 31 ) and from there vertically down to the same drawbar ( 29 ) to be led. Device according to claim 14, characterized in that the rollers ( 31 . 28 ) on one transverse side with the rollers ( 31 . 28 ) on the other transverse side of the cutting frame ( 12 ) over a wave ( 32 ) keep in touch. Device according to one or more of claims 13 to 15, characterized by guide means between the accessory-side columns ( 22 ) and the cutting frame ( 12 ). Apparatus according to claim 16, characterized in that the guide means a vertical guide rail or guide groove ( 50 ) on the columns ( 22 ), in each of which a slider ( 51 ) is guided, wherein the slider ( 51 ) about a horizontal parallel to the longitudinal beam ( 14 ) axis ( 53 ) pivotally a connecting bridge ( 52 ), which is connected to the longitudinal beam ( 14 ) is firmly connected. Device according to one or more of claims 8 to 12, characterized in that the supporting elements comprise four foundation-based lifting devices ( 40 ), of which in each case one below a corner region of the cutting frame ( 12 ) is arranged tightly, wherein the lifting devices ( 40 ) on one longitudinal side of the cutting frame ( 12 ) are actuated independently of the lifting devices on the other longitudinal side. Device according to claim 18, characterized in that the lifting devices ( 40 ) at least on one longitudinal side of the cross-cutting device, preferably on both sides of the base side and the cutting frame side each have an effective pivoting of the cutting frame hinge device. Apparatus according to claim 18 and / or 19, characterized in that outside the two corner regions on a longitudinal side of the cutting frame ( 12 ) a vertical foundation-supported column element ( 41 ) and between the column elements ( 41 ) and the cutting frame ( 12 ) vertical guidance devices ( 42 ) with a hinged joint device ( 43 ) are arranged with a horizontal pivot axis.