EP0719622A1 - Mould with a plurality of moulding spaces for making concrete products - Google Patents

Abstract

The bottom part of the mould has a frame (6) on which is at least one slide-piece (4) horizontally sliding on it. The slide-piece is in the form of a mask with windows (5) with edge parts (14) moulding the underside of over-gripping parts. The top part of the frame has several groups of punches. The punches belonging to different groups are mounted so as to move vertically in relation to each other.

Description

The invention relates to a multi-chamber mold for the mechanical production of moldings made of concrete according to the preamble of claim 1. Examples of the moldings to be produced are shown spatially in Figures 1 and 2 of the drawing. They are concrete paving stones that form a bond even in the vertical direction of loading and are therefore suitable for heavily used paving surfaces such as pedestrian zones, airfields, fire brigade exits and the like. The individual stone cannot be twisted or pulled out in the pavement bandage.

Such moldings are assumed to be known. Their essential design feature is that they have lateral depressions in the lower area and lateral projections in the upper area and can therefore not be produced in conventional molding devices. The moldings in question are to be distinguished from those which have lateral projections in the lower region and therefore require molds with a split load.

Known multi-chamber molds for the production of square concrete paving stones, which alternately have protruding ledges and grooves on their successive sides and thus in a vertical bond with one another stand, have a so-called drawing plate. On this, strips running across the entire width of the mold frame are attached, which form the grooves on two opposite sides of the paving stone to be produced.

The disadvantage is that, on the one hand, the manufacturing process is time-consuming and cumbersome, because before the demolding, which is done by raising the mold frame, the drawing plate must be pulled out of the mold frame horizontally and transversely to the direction of production and must be used again before the next filling.

On the other hand, such a molding device forces the same alignment of all the moldings contained therein, with the result that every second one of these has to be rotated through 90 ° for laying. So the stones cannot be made "ready to install".

So-called rotary table presses for producing such concrete paving stones are also known. Six mold chambers are arranged on a turntable. They are filled, stamped and demolded in an angular cycle. The most important thing is a turning device, with the help of which the individual mold is turned over by 180 ° for demoulding, as when emptying a pudding mold (overhead production).

Such a manufacturing process requires exceptionally high mold costs and is far from meeting today's expectations in paving stone production. The main disadvantage, however, is that the shaped bodies on the visible side, which originally lie at the bottom in these molds, have an uneven structure and therefore surface treatment by sticking, washing or the like is out of the question. This would make the difference in density of the material even clearer.

The invention has for its object to propose a relatively simple and inexpensive molding device for the production of moldings of the type described in the introduction, which can be used in modern high-performance stone pavers and enables the simultaneous production of several moldings in a ready-to-install arrangement.

This object is achieved on the basis of a multi-chamber shape with the intended purpose described in the introduction by the characterizing features of claim 1.

According to this proposal, a split load molding device, i.e. with several relatively vertically movable stamps per molding chamber or molding, supplemented by a horizontal slide, which no longer has to be moved over the entire width or length of the molding frame, but only within a small stroke range in the order of the depth of the lateral recesses of the die to be produced Molded body. The slide is moved with one or a few working cylinders, for example hydraulic cylinders controlled by the production machine, between a working position and a demolding position. As a result, the working speed or production output is practically not reduced compared to the values that can be achieved today in the production of concrete paving stones. Furthermore, as will be explained in more detail below, with a corresponding design of the shaped body, an arrangement-appropriate arrangement of the concrete bodies produced can be achieved with a single slide.

So that the concrete bodies can leave the mold chamber when demolding, the window recesses of the slide must be at least as large as the projection area of a molded body on its base. Certain marginal areas the window recesses form the underside of the overlapping parts in the working position of the slide, in contrast, in the demolding position, these edge parts are withdrawn so far that they pass the overlapping parts of the molded body when the lower mold part is raised.

A group of separate stamps is preferably provided on the upper part of the mold, the printing surface of which corresponds to the projection surface only of the lower grip parts, these stamps leading into the molding material in advance of the stamps which form the higher visible surface in order to cleanly compress these lower grip parts and their surface to shape. To this extent, use is made of the known technique for forming lateral projections in the lower region of the molded body.

To simplify the manufacture of the mold frame, it is proposed that it be provided on its underside with attachment parts which are of the same height as the shape-effective edge parts of the slide and form the side surfaces of the lower grip parts of the molded body. These attachment parts can be used to participate in the horizontal guidance of the slide and to support its weight. For this purpose, it is proposed that the attachment parts have horizontal support projections which partially engage under the slide.

An essential development of the invention consists in that several individually or jointly drivable slides are arranged one above the other on the underside of the mold frame. In particular, two slides running in opposite directions in an axis of movement can be provided, which consist of flat metal and have shape-effective window edge regions of increased thickness, the edge regions of one slider projecting beyond its flat metal surface and into the corresponding window recesses of the other slider intervention. It is only a question of dimensioning the window cutouts in order to achieve that in the extended position, ie in the demolding position of the slide, the remaining opening allows the entire molded body to pass through, ie it is at least as large as its projection surface.

With regard to the goal of a ready-to-install arrangement, it is advantageous to arrange the direction of movement of the slide (s) obliquely to the sides of rectangular mold chambers or the mold frame, in particular to select an angle of 45 °. In this way, square or rectangular moldings can be arranged in a space-saving manner in the mold frame, and nevertheless it is possible to make depressions on two colliding sides of a molded body with a single slide, on both sides or optionally on one of the two sides. With two opposing slides, indentations can optionally be made on all four sides of the molded body, in particular wedge-shaped indentations, which interact with correspondingly pointed projections (lower grip parts).

For the purpose of guiding, the slider or slides can have elongated holes which are penetrated by guide bolts attached to the mold frame. The guide pins can be equipped with roller bearings to reduce friction. In the case of slides movable obliquely to the longitudinal edges of the mold frame, the lifting cylinders provided for driving them can act in the longitudinal direction of the mold frame. This makes it easier to accommodate the lifting cylinders. The drive forces are redirected by the slide guides.

Since the drive cylinders, in particular hydraulic cylinders, belong to the shaping device and are arranged thereon, the shaping device is replaced by a production machine Relieved and accelerated if quick-connect couplings are provided on the hydraulic connecting lines of the cylinders. Also for the articulation of the cylinders or their piston rods on the slides, quick-release and reattachable snap connections are expediently used, since the sliders are expediently removed from the mold frame for cleaning after the end of production (at the end of work) and then reassembled.

If the slides are held on the mold frame with screw elements, for example head disks screwed onto the guide pins, the mentioned, repeated dismantling and assembly of the slides requires a great deal of work for cleaning. In order to reduce this and to facilitate the cleaning of the slide, it is proposed that the slide (s) be held on the mold frame with the aid of rotary latches, spring elements forcing the rotary latch into a closed position. In addition, an (auxiliary) device is proposed, which is placed on the molding table and which is designed such that when the mold frame is lowered onto this dismantling assembly device, the rotary latches are either opened or closed automatically. For this purpose, the last-mentioned device may have height-adjustable stop means, which act on the rotary latches and / or the spring elements when the mold frame is lowered and bring about a movement or relief of the same. So you only need to put this device on the molding table and move the molding frame down in manual control mode. The slides are then uncoupled automatically and remain on the device. After cleaning, they are put back on the device. Then you move the mold frame down again. The sliders are automatically picked up and locked again.

Fig. 1

eine räumliche Darstellung eines Betonpflastersteins mit leistenartigen Unter- und Übergreifpartien,

Fig. 2

in ähnlicher Darstellung einen weiteren Betonpflasterstein, der ringsum abwechselnd Untergreifpartien in Form von dreieckigen Nocken und entsprechende Aussparungen aufweist,

Fig. 3

die Draufsicht des Formrahmens einer Formvorrichtung zur Herstellung des Steines nach Fig. 1,

Fig. 4

einen Teilquerschnitt IV-IV, und

Fig. 5

eine Teildraufsicht des Formrahmens nach Fig. 3 in größerem Maßstab,

Fig. 6

einen Teilquerschnitt VI-VI und

Fig. 7

eine Teildraufsicht eines an dem Formrahmen nach Fig. 3 gelagerten Schiebers,

Fig. 8

einen Teilquerschnitt des zusammengebauten Formunterteils aus dem Rahmen und dem Schieber nach den Figuren 5 und 7,

Fig. 9

eine Teilansicht, und zwar teilweise geschnitten nach der Schnittlinie IX-IX, eines Formoberteils für diese Formvorrichtung,

Fig. 10

einen Horizontalschnitt X-X zweier Stempel an dem Formoberteil nach Fig. 9,

Fig. 11

den Vertikalschnitt XI-XI eines Führungsschlitzes und der dazugehörigen Führungs- und Halteorgane in natürlicher Größe für den Schieber nach Fig. 7,

Fig. 12

einen Teilquerschnitt XII-XII und

Fig. 13

eine Teildraufsicht des Formrahmens einer Formvorrichtung für den Stein nach Fig. 2,

Fig. 14

einen Teilquerschnitt XIV-XIV und

Fig. 15

eine Teildraufsicht des oberen von zwei Schiebern, die mit dem Formrahmen nach Fig. 13 zusammenwirken,

Fig. 16

einen Teilquerschnitt XVI-XVI und

Fig. 17

eine Teildraufsicht des unteren Schiebers,

Fig. 18

einen Teilquerschnitt XVIII-XVIII und

Fig. 19

eine schematische Teildraufsicht des kompletten Formunterteils mit beiden Schiebern in geöffneter Stellung,

Fig. 20

einen Teilquerschnitt XX-XX und

Fig. 21

eine Teildraufsicht des Formunterteils in geschlossener Stellung der Schieber, d. h. in der Stellung vor dem Füllen der Formkammer,

Fig. 22

eine nach der Schnittlinie XXII-XXII teilweise vertikal geschnittene Teilansicht des Formoberteils der Formvorrichtung für den Stein nach Fig. 2,

Fig. 23

einen Horizontalschnitt XXIII-XXIII der Stempelanordnung,

Fig. 24

eine verkleinerte Draufsicht auf den gesamten Formrahmen dieser Formvorrichtung,

Fig. 25

eine schematische Darstellung im Vertikalschnitt XXV-XXV einer Demontage- und Montagevorrichtung für Schieber derartiger Formen und

Fig. 26

eine Horizontalschnitt XXVI-XXVI der Vorrichtung nach Fig. 25.

Embodiments of the invention are explained below with reference to the drawing. In detail shows

Fig. 1

a spatial representation of a concrete paving stone with strip-like under and overlapping parts,

Fig. 2

in a similar representation another concrete paving stone, which alternately has under-grip parts in the form of triangular cams and corresponding recesses,

Fig. 3

the top view of the mold frame of a molding device for producing the stone of FIG. 1,

Fig. 4

a partial cross section IV-IV, and

Fig. 5

3 shows a partial top view of the mold frame according to FIG. 3 on a larger scale,

Fig. 6

a partial cross section VI-VI and

Fig. 7

3 shows a partial top view of a slide mounted on the molding frame according to FIG. 3,

Fig. 8

4 shows a partial cross section of the assembled lower part of the frame and the slide according to FIGS. 5 and 7,

Fig. 9

2 shows a partial view, specifically cut according to section line IX-IX, of an upper mold part for this molding device,

Fig. 10

9 shows a horizontal section XX of two stamps on the upper mold part according to FIG. 9,

Fig. 11

the vertical section XI-XI of a guide slot and the associated guide and holding members in natural size for the slide according to FIG. 7,

Fig. 12

a partial cross section XII-XII and

Fig. 13

3 shows a partial top view of the mold frame of a molding device for the stone according to FIG. 2,

Fig. 14

a partial cross section XIV-XIV and

Fig. 15

a partial plan view of the upper of two slides, which cooperate with the mold frame of FIG. 13,

Fig. 16

a partial cross section XVI-XVI and

Fig. 17

a partial plan view of the lower slide,

Fig. 18

a partial cross section XVIII-XVIII and

Fig. 19

2 shows a schematic partial top view of the complete lower mold part with both slides in the open position,

Fig. 20

a partial cross section XX-XX and

Fig. 21

a partial plan view of the lower mold part in the closed position of the slide, ie in the position before filling the mold chamber,

Fig. 22

2 shows a partial view of the upper mold part of the molding device for the stone according to FIG.

Fig. 23

a horizontal section XXIII-XXIII of the stamp arrangement,

Fig. 24

a reduced plan view of the entire mold frame of this molding device,

Fig. 25

is a schematic representation in vertical section XXV-XXV of a disassembly and assembly device for sliders of such shapes and

Fig. 26

a horizontal section XXVI-XXVI of the device of FIG. 25th

The square concrete paving stone shown in Fig. 1 is vertically connected with its neighboring stones. It has lower gripping strips 1 on two colliding longitudinal sides, which extend almost over the entire side length and are slightly chamfered on the surface in a wedge shape. Corresponding grooves 2 are provided at the bottom on the other two sides, which are at the rear in FIG. 1, which go under the visible surface and can accommodate the lower gripping strips of the neighboring stones. A fragment 3 of an adjacent stone is indicated.

A multi-chamber molding device for producing such concrete paving stones is shown in FIGS. 3 to 11. It is particularly simple since the lower mold part has only one slide 4 with window cutouts 5. The mold frame 6 as a whole is shown in FIG. 3. FIGS. 4 and 5 show only one molding chamber 7 in enlarged detail.

Figures 6 and 7 show only the slide 4 in a corresponding enlargement.

The rectangular mold frame 6 has twelve mold chambers 7. They are all aligned in the same way, so that the stones are arranged to be laid after demolding. The stones of a layer only need to be pushed together for transport on the pallet. The form frame consists of a steel plate with a double wear plate. The mold chambers 7 are z. B. cut out with a laser beam. Protruding strips 8 on two opposite sides serve to receive the mold frame in the machine. The filling truck runs on two prismatic rails 9. The form frame is stiffened by various ribs, not individually identified.

In order to give the molding chambers 7 the required depth, attachment angles 10 z are on the underside of the molding frame. B. attached with the help of screws 11. These have the same height as the slide 4 to be described below. The attachment angles 10 are also cut out of a correspondingly thick flat material. They have the same cross-section over their entire length and are divided into two long legs with short, right-angled inward projections which form the end faces 12 (FIG. 1) of the lower gripping strips 1. Some of the attachment angles 10 have a strip-shaped support projection 13 on the leg extending in the transverse direction of the shape, which serves as an additional sliding guide for the slide 4.

The slide 4, also cut from a steel plate, has relatively thin bars. Its window cutouts 5 are so large that they encompass the molding chambers 7 and the attachment angles 10. The slide bars are widened on the right and lower side of each window recess 5 according to FIG. 7. Those standing in the window widened parts 14 form the grooves 2 of the stone to be shaped. They are chamfered at the top towards the edge. These important parts 14 are able to move into the molding chamber. They then abut the end faces of the small extensions of the attachment angles 10 and form - in plan view - a complete frame with a square opening. However, this square opening does not correspond to the position of the visible surface of the concrete paving stone in the form, as will be explained further.

For guidance, the slide 4 has a plurality of rectangular tabs 15 in the edge, in each of which an elongated hole 16 running at 45 ° is formed. As the cross section according to FIG. 11 shows, a shoulder 17 is worked out on the underside around the elongated hole. In the area of the crossbars, the slide has groove-like cutouts 18 on the underside, which also extend under the widened portions 14. In these cutouts 18, the support projections 13 fit, so that the latter, when assembled, as shown in FIG. 8, reach under the slide and support it without obstructing its mobility and hold it on the mold frame 6.

Forced by the elongated holes 16, the slide is thus movable on the mold frame in the 45 ° direction. It is driven by two hydraulic lifting cylinders 19 (FIG. 3) which are articulated on the one hand on the mold frame and on the other hand on the slide. For this purpose, the slide has tabs 20 projecting laterally, to which, as indicated by bores, the joint caps of the piston rods are screwed on.

11 shows in detail which guide means can be expediently provided. A threaded pin 22 equipped with a ball bearing 21 is from below screwed into the mold frame 6. A head plate 23 is then screwed onto the pin by means of a countersunk screw 24. This head plate 23 engages over the shoulder 17 of the elongated hole and thus locks the slide on the mold frame.

The associated molded upper part is shown in principle in FIGS. 9 and 10. The horizontal section of the pair of punches for a molding chamber is arranged in the same way as the molding chambers themselves. The punches are separated into two groups, the square so-called pressure plates 25 forming one group and the deeper angular punches 26 forming the other group. The punches 26 are fastened directly via pressure rods 27 to a load plate 28, which, moreover, has a stiffening rib mechanism and connecting elements for attachment to the bear of the molding machine. The pressure plates 25, on the other hand, which form the visible side of the concrete paving stone, are fastened via four punch shafts 29 to a common plate 30 which is suspended from the load plate 28 in a freely movable manner by means of supporting bolts 31. The angular punches 26 penetrate deeper into the filled molding chamber, while the pressure plates 25 initially rest on the molding material only because of their own weight. With increasing compression under the action of the vibrating forces, the spacer strips of the plate 30 rest against the load plate 28, as is shown in the left half of FIG. 9 for clarification. This is the final position in the molding process. The rest position of this stamp is shown on the right in FIG. 9.

8 shows the shape in the working position. The slider 4 has moved to the top left according to FIG. 5. The widened portion 14 of the slide projects into the molding chamber 7. When lowering the upper part of the mold, the pressure plate 25 lies with its right and its lower edge (according to FIG. 10) on the corresponding one Edges of the molding chamber 7. It also compresses the material over the widened parts 14 of the slide. The angular punch 26, however, rests on the other two edges of the molding chamber. It compresses the material over the lower gripping strips 1 of the concrete paving stone and forms its surface.

For demolding, the slide is moved to the bottom right out of the molding chamber with reference to FIG. 5, so that the full outline of the molding chamber is exposed and the molded body can thus be removed from the mold by raising the upper mold part and remains on the molding table.

The production of the concrete paving stone shown in FIG. 2 is described as a further exemplary embodiment. It has a square visible surface chamfered on the edge as usual and on each side two projecting cams 40 which are triangular in plan and two recesses 41 which, with their likewise triangular plan form, can suitably accommodate cams from neighboring stones. The cams and recesses on the invisible backs of the concrete paving stone are arranged so that the stones can all be made in the same orientation and then simply pushed together. The cams 40 are chamfered at the top towards the tip. They form the lower grip areas of this stone, while the areas above the cutouts 41 are to be addressed as overlap areas in this case. The vertical surfaces of the cams and the recesses are at right angles to each other and form an angle of 45 ° to the side surfaces of the stone. Several stones pushed together up to the stop stand in a vertical connection to each other. Due to the pointed shape, the cams and recesses easily find one another. The direction of collapse can advantageously deviate from the edge direction by up to 45 °.

The shaping device for producing this concrete paving stone is shown in FIGS. 12 to 24. The last-mentioned figure shows the entire molding frame 42. Six molding chambers 43 are provided and two lifting cylinders 44, each lifting cylinder being articulated on the two slides used here, so that they can be pushed together or apart. FIGS. 12 and 13 show a section of the molding frame 42 with only one molding chamber and on a larger scale. The molding chamber 43 represents the outline of the concrete paving stone to be molded. From the sectional view it can be seen that a relatively thin plate has been used to produce the molding frame , wherein by placing a mold chamber frame 46 on the underside thereof, the mold chamber is given a greater depth. However, this detail is not essential insofar as the slides are arranged below the molding chamber frame 46. The mold frame 42 could therefore have been cut directly from thicker material. 13 also shows the locations of the bores 47 into which the guide pins for the slot guides of the slides are screwed.

An upper slide 48 (FIG. 15) sits immediately below the molding frame 42 and a lower slide 49 (FIG. 17) adjoins this. From the cross sections according to FIGS. 14 and 16 it can be seen that both slides consist of a relatively thin flat material with originally square window cutouts 50 and 51, respectively. In the case of the slide 48, an overall angular shaped piece 52 is inserted into the window cutout, which abuts two window edges and is flush with the surface of the slide at the top. This shaped piece 52 has two projections 53 and two notches 54 on each side. The projections 53 form the recesses 41 of the stone. The notches 54 form the side surface of the protrusions 40 of the stone, while the surface of these protrusions 40 of special stamps which will be discussed later. In the lower slide 49, a shaped piece 55 is inserted into the window cutouts 51 in such a way that it projects above the flat material thickness of the slide 48 over the surface of the slide 49. Both fittings 52 and 55 are of the same height. Both abut the mold chamber frame 46 and are therefore at the same level. With their undersides, the shaped pieces 52 and 55 rest on the molding table. The sections of flat material from both slides lie and slide against each other. Guide pins 56 engage in oblong holes 57 and 58 of the two sliders 48 and 49, respectively, with head disks 59 screwed onto the guide pins 56 (shown in FIG. 18) holding the sliders on the mold frame.

The sectional representations of FIGS. 18 and 20 show the assembled lower mold part in the open or closed position. The top views according to FIGS. 19 and 21 are schematic insofar as parts of the slides which lie under the mold frame are shown in solid lines in the interest of clarity. For the same reason, the surface of the molding 52 of the upper slide is hatched and the surface of the molding 55 of the lower slide is dotted. The elongated holes 57 of the upper slide are shown in broken lines and the elongated holes 58 of the lower slide are shown in solid lines. Figures 20 and 21 show the closed shape, ready for filling. It can be seen that the four projections 53 of the upper slide and the four corresponding projections on the shaped piece 55 of the lower slide project into the window cutout 43 of the mold frame. In this respect, the remaining clear opening according to FIG. 21 differs from the molding chamber 43. The notches 54 of the molding 52 and the corresponding notches of the molding 55 are congruent under the eight notches of the molding frame 42.

In order to complete the understanding of the molding device, the upper mold part and one of the stamp arrangements are shown in FIGS. 22 and 23. Again, two groups of stamps are provided which are attached to two plates 60 and 61 via their stamp shafts or pressure rods. The upper plate is the load plate 60 to be connected to the bear of the production machine. Eight cross-sectionally triangular stamps 62 are fastened to it per molding chamber, as many as the concrete paving stone has cams. These stamps run in the eight vertical channels, which are formed by the notches of the mold plate and the notches of the mold pieces 52 and 55 arranged congruently underneath. The pressure surfaces of these stamps are slightly inclined towards the tips pointing outwards. They first penetrate the molding material and compress it where the cams 40 are formed and form their upper surface. The other group of stamps comprises the six pressure plates 63 of the mold. These square plates are fastened to the plate 61 via their stamp shaft, which are guided on the load plate 60 in a vertically movable manner on support bolts 64, the possible stroke of the pressure plates 63 being limited by the support bolts 64. In the course of the molding process, the punches 62 first penetrate into the molding material. The pressure plates are not yet under pressure. They only reach their end position when, at the end of the process, the plate 61 comes to rest against the load plate 60 via its corresponding spacer bar.

After compression, the lifting cylinders 44 first move the two slides apart into the open demolding position according to FIGS. 18 and 19. This again clears the entire cross-section of the molding chamber. The mold frame 42 moves upwards. The punches 62 follow until finally, when the heads of the support bolts 64 come to rest on the plate 61, the pressure plates 63 also lift off from the molding.

Shapes of a similar design with an oblique slide direction of movement can of course also be used to produce moldings with a design different from the examples. To mention, for example, a concrete paving stone, which has similar gripping strips as the stone according to FIG. 1, but in which these gripping strips are arranged on opposite sides, as well as the grooves which accommodate the neighboring gripping strips. When producing such bricks with conventional sheet metal molds, every second brick had to be rotated before laying. With two slides that are movable against each other at 45 ° to the longitudinal edges, such stones can be produced ready for installation, namely because every second stone is arranged in the shape rotated by 90 °. The slides then have the edge areas forming the recesses in one case on the longitudinal and in the other case on the transverse sides of the window cutouts.

The operation of the slide, even under the toughest conditions, runs without disruption. While the mold is at rest after the end of operation, concrete sludge can solidify in the mold and lead to malfunctions during commissioning. It has therefore proven to be advisable to dismantle, clean and grease the slide valve after the end of operation. In order to be able to carry out this maintenance work more easily and quickly, a largely self-acting dismantling assembly device is proposed, which is shown schematically in FIGS. 25 and 26. In the upper part of FIG. 25, this is an axial section of a guide and connection arrangement between a mold frame 70 and two schematically illustrated sliders 71 and 72.

A guide sleeve 73 is inserted into the mold frame 70 from below and fastened from above with a countersunk screw. In the guide sleeve, which has a radial slot 74 below has, runs a pressure piece 75, which is under the pressure of a strong spring 76. At the lower end of the guide sleeve 73, a rotary bolt 77 is rotatably mounted about a transverse axis 78, which is surrounded by a bearing sleeve 79. Due to the shape of the rotary latch, it has two stable positions, namely the horizontal position shown in solid lines and a steep downward-pointing position, which is indicated by dash-dotted lines and in which the rotary latch 77 is located within the outer circumference of the guide sleeve 73. This guide sleeve fulfills the task of the guide pin, for. B. 56, the examples described above and the rotary latch 77 fulfills the task of the head plate 59, ie it holds the slide on the mold frame. The spring 76 must only be dimensioned strong enough.

The device also includes a base plate 80 and a support plate 81 which is adjustable in relation to the base plate. The support plate has a recess 82 at the top with a gradient region 83 extending in the direction of extension of the rotary bolt. Furthermore, four pins 84 are provided which extend upward from the base plate 80 stand and push through the platen 81. These pins have an approximately triangular cross section and are able to intervene in the gusset between the guide sleeve 73, the bearing sleeve 79 and the rotary bolt 77 and to raise the pressure piece 75 against the spring force at appropriate height conditions.

The device described works as follows: For disassembly, the two plates 80 and 81 lie one on top of the other, as shown in the lower part of FIG. 25. If the lower mold part now lowers and the pins 84 come into contact with the pressure piece 75, the bolt is released for the rotary movement. Under the weight of the two sliders lying on it, it rotates to the position shown in broken lines and the two slides fall onto the Platen 81 down. It must also be mentioned that at least two guide pins, not shown, are attached to the base plate 80 in an upward position. They penetrate the support plate 81 as well as the two sliders and thus guide all four parts mentioned exactly in the vertical direction.

1

Untergreifleiste

2

Auskehlung

3

Nachbarstein

4

Schieber

5

Fensteraussparung

6

Formrahmen

7

Formkammer

8

Streifen

9

Laufschiene

10

Ansetzwinkel

11

Schraube

12

Stirnfläche

13

Tragvorsprung

14

verbreiterte Partie

15

Lappen

16

Langloch

17

Schulter

18

Ausfräsung

19

Hubzylinder

20

Lappen

21

Kugellager

22

Gewindezapfen

23

Kopfplatte

24

Senkschraube

25

Druckplatte

26

Stempel

27

Druckstange

28

Auflastplatte

29

Stempelschaft

30

Platte

31

Tragbolzen

40

Nocken

41

Aussparung

42

Formrahmen

43

Formkammer

44

Hubzylinder

46

Formkammerrahmen

47

Bohrung

48

oberer Schieber

49

unterer Schieber

50

Fensterausschnitt

51

Fensterausschnitt

52

Formstück

53

Vorsprung

54

Kerbe

55

Formstück

56

Führungszapfen

57

Langloch

58

Langloch

59

Kopfscheibe

60

Auflastplatte

61

Platte

62

Stempel

63

Druckplatte

64

Tragbolzen

70

Formrahmen

71

Schieber

72

Schieber

73

Führungshülse

74

Radialschlitz

75

Druckstück

76

Feder

77

Drehriegel

78

Querachse

79

Lagerhülse

80

Grundplatte

81

Auflageplatte

82

Aussparung

83

Gefällebereich

84

Stift

85

Ecke

After cleaning, the support plate 81 is raised to the position shown in broken lines, in which it is at a distance from the base plate 80. This can be done with a suitable lever device or by interposing blocks or the like. As indicated by dash-dotted lines, the slides 71 and 72 are ready on the raised support plate 81. If the molding frame is now lowered onto the slides by manual control of the machine, with the rotary latch standing down, the guide sleeve 73 fits into the slits of the slides lying one on top of the other. As soon as the rotary latch 77 comes to rest against the slope region 83, it is turned to the left, the pressure piece 75 evading upwards. As soon as the highest point at the corner 85 of the rotary latch has been overcome, it snaps into the locking position of its own accord, so that when the mold frame is raised again, the automatically coupled slides go up with it.

1

Lower grip bar

2nd

Grooving

3rd

Neighbor stone

4th

Slider

5

Window recess

6

Molded frame

7

Molding chamber

8th

Stripes

9

Track

10th

Angle of attack

11

screw

12th

Face

13

Support projection

14

widened lot

15

Rag

16

Long hole

17th

shoulder

18th

Milling

19th

Lifting cylinder

20th

Rag

21

ball-bearing

22

Threaded pin

23

Headstock

24th

Countersunk screw

25th

printing plate

26

stamp

27

Push rod

28

Load plate

29

Stamp shaft

30th

plate

31

Supporting bolt

40

cam

41

Recess

42

Molded frame

43

Molding chamber

44

Lifting cylinder

46

Mold chamber frame

47

drilling

48

upper slider

49

lower slider

50

Window cutout

51

Window cutout

52

Fitting

53

head Start

54

score

55

Fitting

56

Guide pin

57

Long hole

58

Long hole

59

Head disc

60

Load plate

61

plate

62

stamp

63

printing plate

64

Supporting bolt

70

Molded frame

71

Slider

72

Slider

73

Guide sleeve

74

Radial slot

75

Pressure piece

76

feather

77

Rotary latch

78

Transverse axis

79

Bearing sleeve

80

Base plate

81

Platen

82

Recess

83

Slope area

84

pen

85

corner

Claims (13)

Multi-chamber mold for the mechanical production of shaped bodies made of concrete, which have lower grip parts (1, 40) offset downwards with respect to their upper visible surface and overlapping parts of reduced height which are offset upwards with respect to their lower contact surface, with which they interlock and overlap each other when aligned horizontally by means of a lower mold part with a mold frame (6) and at least one slide (4) guided horizontally displaceably on the mold frame in the form of a mask provided with window recesses (5) and by an upper mold part with several stamp groups, stamps (25, 26) belonging to different groups are vertically displaceable against each other. Multi-chamber mold according to claim 1, characterized in that the window recesses (5) are at least as large as the projection area of a shaped body, and that edge portions (14) of the window recesses in a working position of the slide (4) form the underside of the overlapping parts and so far in a demolding position are withdrawn that they come past the overlapping parts of the molded body when the lower mold part is raised. Multi-chamber mold according to Claim 1, characterized in that a group of separate stamps (26) is provided on the upper mold part, the pressure surface of which corresponds to the projection surface of the lower grip parts (1) and which, during the molding process, relates to the stamps (25) which are higher ) Form the visible surface (s), leading into the molding material penetrate in order to compress the lower grip sections and to form the upper side. Multi-chamber mold according to claim 1, characterized in that the mold frame (6) is provided on its underside with attachment parts (10) which are of the same height as the shape-effective edge parts (14) of the slide and form the side surfaces of the lower grip parts (1). Multi-chamber mold according to claim 4, characterized in that the attachment parts have horizontal support projections (13) which partially engage under the slide. Multi-chamber mold according to Claim 1, characterized in that a plurality of slides (48, 49) which can be driven in opposite or separate directions are arranged one above the other on the underside of the mold frame (42). Multi-chamber mold according to claim 6, characterized in that two opposing slides (48, 49) are provided, which consist of flat metal and have shape-effective window edge areas (52, 55) of increased thickness, the edge areas of one slider projecting beyond its flat metal surface and into the corresponding Engage the window recesses of the other slider. Multi-chamber mold according to claim 1, characterized in that the direction of movement of the slide (s) extends obliquely, in particular at an angle of 45 °, to the sides of rectangular mold chambers or the mold frame. Multi-chamber mold according to claim 1, characterized in that the slide (s) for the purpose of guiding has elongated holes (57, 58) which are penetrated by guide bolts (47) fastened to the mold frame and optionally equipped with ball bearings. Multi-chamber mold according to claim 1, characterized in that lifting cylinders (19, 44) are provided for driving the slide (s) with respect to the mold frame, said cylinders acting essentially in the direction of a longitudinal side of the mold frame. Multi-chamber mold according to claim 10, characterized in that hydraulic cylinders are used, the connecting lines of which have quick-connect couplings. Multi-chamber mold according to claim 1, characterized in that the slide (71, 72) on the mold frame (70) is (is) held by means of rotary latches (77), spring elements (76) forcing the rotary latch into a closed position, and that a device (80, 81, 83, 84) is provided for automatically disassembling the slide (s) by opening the rotary latches and for automatically assembling the slide (s) by closing the rotary latches after lowering the mold frame on the dismantling assembly device. Multi-chamber mold according to claim 12, characterized in that the dismantling assembly device optionally has height-adjustable stop means (84) which act on the rotary latches (73) and / or the spring members (76) when the mold frame is lowered, and a movement or relief thereof bring about.

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