EP2718071B1 - Block molding machine and method for vertically adjusting a block molding machine - Google Patents

Description

The invention relates to a block forming machine and a method for height adjustment of a block forming machine.

Stone forming machines are known in various embodiments in the prior art. Essentially, it is a matter of providing a mold in a clocked process, of filling a concrete quantity into the mold cavities of the mold, compacting the concrete quantity with a stamp and / or a vibrating device and then demoulding the moldings. Here it has proven useful to insert underlay pallets in the stone forming machine and lower downwards and downwards open forms on the underlay palettes. The concrete quantity is filled from a concrete bunker into a filling car and let into the mold from the filling car. Subsequently, the concrete is compacted with a vibrating device and with a punch pressing on the concrete. In the next step, the punch and the mold are raised and the base pallet with the moldings is removed from the stone forming machine.

In the EP 0 382 653 A1 a stone forming machine with a vibrator is disclosed. In order to prevent the unbalance exciters of the vibrator between the individual steps must be permanently switched on and off, here a mold plate for compressing the vibrator lowered (shaking the mold plate) and lifted off again (no jarring the mold plate). The eccentrics of the vibrator run continuously regardless of the position of the mold plate and are less stressed.

Stone forming machines can be used to produce differently shaped stones. These may differ in height, in particular. For example, concrete slabs have a height of about 30 mm, while curbs can have a height of about 300 mm. In order to produce stones with different heights, the stone forming machine must be adjustable. Conventional stone forming machines have a main frame, inside which a height-adjustable subframe is arranged. For height adjustment spindle drives are usually provided. These can be turned by hand or with electric motors to the desired height.

It has been shown that the spindle drives allow a very accurate adjustment. A disadvantage, however, considered that the adjustment of the height is associated with a high workload, because the subframe in the main frame after a height adjustment must be adjusted consuming. In addition, the height adjustment with spindle drives is slow.

Against this background, it is the object of the invention to show a stone forming machine in which a height adjustment can be made easily and quickly. Furthermore, a method for height adjustment of a main frame of a block making machine will be shown.

The objective part of this object is achieved by a block forming machine with the features of claim 1. Advantageous embodiments of the invention will become apparent from the dependent claims. The procedural part of the object is achieved by a method having the features of claim 15.

The block making machine has a bearing block and a main frame which can be fixed in height adjustable manner on the bearing block, wherein in particular on the main frame at least one mold lifting device is provided for raising and lowering a stone mold. The main frame is movable relative to the bearing block by actuation of the supported on the bearing block Formhubvorrichtung, in particular raised or lowered.

The bearing block may be an arbitrarily designed support structure, such as a frame, a subframe or the like, or a foundation.

It is therefore used anyway, but intended for other purposes, device for moving the mold to raise or lower the entire main frame with the possibly existing attachments relative to the bearing block and the support palettes. Thus, the subframe, the spindles and spindle drives omitted, the machine is cheaper to manufacture and easier to maintain because fewer parts or drives are available. Since the Formhubvorrichtung is already adjusted, also further adjustments can be saved after a height adjustment. Another advantage is that the Formhubvorrichtung is usually relatively quickly moved, so that a total height adjustment takes less time.

Preferably, the Formhubvorrichtung comprises at least one Formhubzylinder and / or a form of traverse. Due to the mold cross-member, the device is stabilized so that lifting with only one lifting cylinder is possible. Also, a wider shape can be used. With a Formhubzylinder not only higher forms over a larger stroke are quickly relocated, but according to the invention, the entire machine.

Appropriately, the Formhubvorrichtung is supported over at least one Abdrückklotz relative to the bearing block. The use of an ejector block ensures that the former and the pedestal do not come into direct contact. This is advantageous, on the one hand to provide the largest possible stroke of the mold lifting device for normal production operation and on the other hand, the stroke of the molding device need not be extended in addition to provide the lifting function for the main frame of the machine. In this context, it can be provided that the Abdrückklotz is only used in the stone forming machine when a height adjustment of the main frame is to take place.

Furthermore, at least one coupled to the bearing block and the main frame shape guide rod can be provided. The shape guide rod has the task to guide the Formhubvorrichtung. In this way it is ensured that the orientation of the Formhubvorrichtung is always the same. This is particularly advantageous when multiple Formhubzylinder be used, since they can not be operated as uniform in the rule, as would be necessary for a uniform lifting of the stone forming machine.

It is particularly advantageous if the mold lifting device is fixed to the mold guide rod. The shape guide rod is then mounted on floating bearing on the main frame or on the bearing block. It has been found that a Formhubvorrichtung fixed to the mold guide rods is not tilted.

Furthermore, a punch lifting device for raising and lowering at least one punch can be provided on the main frame. Preferably, the punch lifting device comprises at least one punch lifting cylinder and / or a stamping crosshead.

Preferably, at least one of the bearing block and the main frame coupled punch guide rod is provided. The purpose of the punch guide rod is to keep the punch lifting device and the punch attached to the punch lifting device in a constant orientation regardless of the stroke position. In this way, a uniform contact pressure over the entire stamp support surface is achieved.

It is particularly advantageous if the punch lifting device is also fixed to the punch guide rod. The punch guide rod is then mounted on floating bearing on the main frame or on the bearing block. It has been found that a punch lifting device, which, like a carriage, is moved along stationary punch guide rods, due to the high-acting forces and the partial uneven application of force tends to tilt. This is prevented by the attachment of the Stempelhubvorrichtung to the punch guide rod.

In addition, it can be provided that the Formhubvorrichtung is coupled to the punch guide rod and / or the Stempelhubvorrichtung is coupled to the mold guide rod. This mutual coupling increases the precision of alignment even with a particularly high force input. The arrangement is also space-saving.

There may be provided two mold guide rods and two punch guide rods parallel to each other, wherein the mold guide rods are arranged diagonally opposite one another. This arrangement, in which the mold guide rods and the punch guide rods define edges of an imaginary cuboid, makes it possible to guide the stamp and / or the mold in a space-saving arrangement particularly stable against tilting.

The mold guide rod and / or the punch guide rod can be guided by at least one guide unit in the bearing block and / or in the main frame. The guide unit is a floating bearing. In the guide unit, a guide rod is guided with high precision at low friction.

Furthermore, it is expedient if the block making machine has a main frame which can be fixed in height adjustable manner by at least one main frame locking unit on the bearing block. Thus, the main frame relative to the bearing block can be lowered by loosening the Hauptrahmenfeststelleinheit.

The advantage of this solution is the fact that the lowering can be done very quickly because the main frame no longer needs to be cranked down spindle drives. When lowering, in turn, the Formhubvorrichtung can be used. Before releasing the locking unit, the mold lifting device can be moved so that it is supported on the bearing block. This makes it possible to lower the main frame in a controlled manner by releasing the locking unit by retracting the lifting cylinder. If the main frame is at the desired height, this height can be fixed by tightening the locking unit.

Preferably, the main frame on at least one longitudinal guide element, such as a mandrel or a shaft, the bearing block with the locking unit can be fixed. The mandrel has a double function here. First, it ensures accurate alignment of the main frame in the horizontal plane. On the other hand, it allows a precise height adjustment of the main frame.

The method according to the invention for height adjustment of a block making machine comprises the steps of the method of a forming device in a position supported on a bearing block; solving a main frame detecting unit for a main frame; operating the mold lift device such that the main frame is raised; and tightening the main frame detecting unit for the main frame.

The main frame detection unit may be designed as a jaw.

Fig. 1

eine Seitenansicht der erfindungsgemäßen Steinformmaschine im Produktionsprozess bei angehobener Stempelhubvorrichtung;

Fig. 2

eine Schnittdarstellung entlang der Linie A-B in Fig. 1;

Fig. 3

eine Schnittdarstellung entlang der Linie C-D in Fig. 1;

Fig. 4

eine Seitenansicht der erfindungsgemäßen Steinformmaschine von Fig. 1 im Produktionsprozess bei abgesenkter Stempelhubvorrichtung;

Fig. 5

eine Schnittdarstellung entlang der Linie E-F in Fig. 4;

Fig. 6

eine Seitenansicht der erfindungsgemäßen Steinformmaschine von Fig. 1 beim Anheben des Hauptrahmens; und

Fig. 7

eine Schnittdarstellung entlang der Linie G-H in Fig. 6.

The invention is explained in more detail with reference to an embodiment shown in the figures. Show it:

Fig. 1

a side view of the block forming machine according to the invention in the production process with raised Stempelhubvorrichtung;

Fig. 2

a sectional view taken along the line AB in Fig. 1 ;

Fig. 3

a sectional view along the line CD in Fig. 1 ;

Fig. 4

a side view of the stone molding machine according to the invention of Fig. 1 in the production process with lowered punch lifting device;

Fig. 5

a sectional view taken along the line EF in Fig. 4 ;

Fig. 6

a side view of the stone molding machine according to the invention of Fig. 1 when lifting the main frame; and

Fig. 7

a sectional view taken along the line GH in Fig. 6 ,

In the FIGS. 1 to 7 an embodiment of the block molding machine 1 according to the invention is shown in several views and operating conditions. The stone forming machine 1 comprises a main frame 2, which is mounted on a bearing block 3. Main frame 2 and bearing block 3 are referred to together as a frame 4. The bearing block 3 has in the embodiment shown here a rectangular platform 5 with legs 7 in the form of rectangular tubes. In principle, however, the legs 7 can also be designed in any other way.

From the platform 5, four longitudinal guide units extend in the form of thorns 8 in the vertical direction VR upwards, at which the main frame 2 is guided and adjustable in height can be fixed. For this purpose, a main frame locking unit 9 and a main frame guide unit 10 are assigned to each mandrel 8 on the part of the main frame 2. The main frame 2 is a frame construction of profiles 11 welded together. The main frame 2 is in the representations of Fig. 1 . 4 and 6 trapezoidal and in the side views of Fig. 2 . 3 . 5 and 7 rectangular.

On the bearing block 3 and the main frame 2 a plurality of devices are attached. On the bearing block 3 longitudinal beams 12 are provided. The longitudinal beams 12 are also referred to as a static bridge. In the spaces 15 between the longitudinal beams 12 webs 16 of a vibrating table 17 are arranged, on which underlay palettes 13 can be pushed cyclically. On the support pallets 13, the moldings 14 are produced. The vibrating table 17 is mounted on the bearing block 3 via spring elements 18. On the support pallet 13 can be lowered with a Formhubvorrichtung 19 vertically from above a downwardly and upwardly open stone mold 20 (short: shape). Molds 20 are available in various designs to represent a wide range of production. For example, there are molds 20 for stone slabs, paving stones, hollow stones and curbs. As a rule, the molds 20 have a plurality of mold cavities 21 for a plurality of moldings 14.

The mold cavities 21 can be filled via concrete filling devices 22, 23 with a concrete amount 24, 25. For this purpose, in the machine shown, two concrete filling devices 22, 23 are provided, of which the first one fills a so-called core concrete quantity 24 and the other serves to apply a facing concrete amount 25 as a cover layer to a layer of core concrete quantity 24. The concrete filling devices 22, 23 each have a concrete bunker 26, 27, which can be filled via concrete feeders 28, 29 with the concrete amount 24, 25. The core concrete bunker 26 has a larger volume than the header concrete bunker 27. On the floors 30, 31 of the concrete bunker 26, 27 is in each case a closure plate 32, 33 is provided. The concrete amount 24, 25 can be passed from the concrete bunker 26, 27 in a filling carriage 34, 35. The filling carriage 34, 35 is open at the top and bottom. A table plate 36, 37 forms the bottom for the concrete amount 24, 25 in the filling carriage 34, 35. The filling carriage 34, 35 is displaceable with a hydraulic cylinder 38, 39 on the table frame 36, 37 fixed to the main frame 2. If the loading carriage 34, 35 is moved in the direction of the mold 20, then the filling carriage 34, 35 pulls the closure plate 32, 33 fastened to it via support elements 40, 41 into a position closing the concrete bunker 26, 27. In the filling concrete 34 for the core concrete amount 24, an oscillating grate 42 is arranged to be able to fill the core concrete amount 24 evenly in the mold nests 21. After the concrete amount 24, 25 is filled in the mold nests 21, the filling carriage 34, 35 is retracted back to the retracted position ES with the hydraulic cylinder 38, 39. In the retracted position ES of the filling carriage 34, 35, the closure plate 32, 33 are pulled into a concrete bunker 26, 27 opening position OES.

In the embodiment shown here, the stone forming machine can process differently colored intent concrete amount. For this purpose, the Betonfüllvorrichtung 23 for the intent concrete amount 25 three feed hopper 44-46. These can stockpile 25 different colors such as black S, red R and yellow G stockpiled. From the feed hoppers 44-46, the header concrete amount 25 can be conveyed via conveyor units 47 into a hopper 48, from which it can be introduced via a horizontally movable hose 49 into the bunker 27 for the header concrete amount 25.

The mold 20 can be lowered with a Formhubvorrichtung 19 on the support pallet 13 and raised after filling the mold nests 21 with concrete amount 24, 25 and its compression again to demold the moldings 14. The mold lifting device 19 comprises a mold cross-member 50 with a mold holder 51 for a mold 20. The mold cross-member 50 is in the side view of Fig. 1 . 4 and 6 U-shaped. At the upper transverse web 52 of the form traverse 50 engage laterally two Formhubzylinder 53 at. The Formhubzylinder 53 are attached via a bracket 54 on the main frame 2. In order to ensure a precise alignment of the mold lifting device 19, the mold traverse 50 is coupled to first guides 55 consisting of two vertical guide rods 57 and second guides 56 consisting of two vertical guide rods 58. The guide rods 57, 58 are associated with respect to their longitudinal axes LA parallel to each other and each one of the four corners 61 of the mold cross member 50. The mold lifting device 19 is fixedly connected to two diagonally opposite guide rods 57, the mold guide rods 57, in particular via locking units 62, 63. On the other two guide rods 58, the mold cross member 50 can slide along. These guide rods 58 are guided by a guide unit 64 in the form of traverse 50. The guide rods 57, 58 are coupled to the frame 4 via floating bearing 65 on the main frame 2 and the bearing block 3 vertically displaceable.

After filling the concrete amount 24, 25 in the mold nests 21, the concrete amount 24, 25 is compressed. For this purpose, the support pallet 13 is set in vibration with the vibrating table 17. Subsequently, one or more punches 67 are lowered with a punch lifting device 66, cf. especially Fig. 4 and 5 , The punch lifting device 66 comprises a stamping crosspiece 68. The stamping crosspiece 68 has a punch holder 69 for exchangeable receiving stamps 67. The stamping crosshead 68 is moved by a centrally arranged stamp lifting cylinder 70. The Stempelhubzylinder 70 is also attached via the bracket 54 on the main frame 2. The stamping crosshead 68 is coupled to the second guides 56 consisting of two guide rods 58 and the first guides 55. The two diagonally opposite guide rods 58, which are not form guide rods 57, are referred to as punch guide rods 58 because they are attached to the stamping crosshead 68 via lock units 71. The stamp crosspiece 68 may slide along the mold guide rods 57 via guide units 73 along.

The mold lift device 19, the Stempelhubeinrichtung 66 and the guide rods 57 are double symmetrical with respect to two central longitudinal planes MLE1, MLE2.

In order to raise the level of the table top 36, 37 with respect to the support pallet 13 to the height of the upper edge 75 of the mold 20, the main frame 2 in height is displaced. In order to raise the main frame 2, the mold cross member 50 is displaced downward until it is supported on the bearing block 3 via four Abdrückklötze 76 associated with the guide rods 57, 58, in particular the guide rods 57, 58 embracing. The further extension of the Formhubzylinder 53 of the Formhubvorrichtung 19 causes the main frame 2 is raised with all attachments. Before and after lifting, the main frame locking units 9 are to be loosened or tightened. The lowering of the main frame 2 can be done in the simplest case by controlled release of the main frame locking units 9. The lowering can be supported by the Formhubvorrichtung 19 by the mold crosshead 50 is moved into a supported on the bracket 3 position AP before releasing the Hauptrahmenfeststelleinheiten 9 and retracted after release of the Formhubzylinder 53. When the desired height has been reached, the main frame 2 is fixed by the main frame locking units 9 to the spikes 8 of the bearing block 3 with the main frame locking unit 9.

reference numeral

1 -

Block making machine

2 -

main frame

3 -

bearing block

4 -

frame

5 -

platform

6 -

corners

7 -

leg

8th -

mandrel

9 -

Main frame judgment unit

10 -

Main frame guide unit

11 -

profile

12 -

stringers

13 -

underlay palette

14 -

molding

15 -

gap

16 -

web

17 -

shaking table

18 -

spring element

19 -

Formhubvorrichtung

20 -

stone shape

21 -

cavity

22 -

Betonfüllvorrichtung

23 -

Betonfüllvorrichtung

24 -

Core concrete mixture

25 -

Facing concrete mixture

26 -

concrete bunker

27 -

concrete bunker

28 -

concrete feed

29 -

concrete feed

30 -

ground

31 -

ground

32 -

Sealing sheet

33 -

Sealing sheet

34 -

charging car

35 -

charging car

36 -

table sheet

37 -

table sheet

38 -

hydraulic cylinders

39 -

hydraulic cylinders

40 -

supporting member

41 -

supporting member

42 -

rust

44 -

hopper

45 -

hopper

46 -

hopper

47 -

delivery unit

48 -

funnel

49 -

tube

50 -

Traverse form

51 -

mold support

52 -

crosspiece

53 -

Formhubzylinder

54 -

console

55 -

First tour

56 -

Second leadership

57 -

guide rod

58 -

guide rod

61 -

corner

62 -

Locking Unit

63 -

Locking Unit

64 -

Guide unit

65 -

movable bearing

66 -

Stempelhubvorrichtung

67 -

stamp

68 -

stamp Traverse

69 -

stamp holder

70 -

Stempelhubzylinder

71 -

Locking Unit

73 -

Guide unit

75 -

top edge

76 -

Abdrückklotz

AP -

Supported position

ES -

Engaged position

G -

yellow

LA -

Longitudinal axis of 57, 58

MLE1 -

Center longitudinal plane 1

MLE2 -

Middle longitudinal plane 2

OES -

Opening position

R -

red

S -

black

VR -

Vertical direction

Claims (15)

1. A block moulding machine including a pedestal (3) and a main frame (2), which is vertically movable and fixable on the pedestal (3), wherein at least one mould lifting device (19) is provided on the main frame (2) for raising and lowering a block mould (20), characterised in that the main frame (2) is movable with respect to the pedestal (3) by actuation of the mould lifting device (19) supported on the pedestal (3).
2. A block moulding machine as claimed in Claim 1, characterised in that the mould lifting device (19) includes at least one mould lifting cylinder (53) and/or a mould crossbeam (50).
3. A block moulding machine as claimed in Claim 1 or 2, characterised in that the mould lifting device (19) is supported by means of at least one jack block (76) on the pedestal (3).
4. A block moulding machine as claimed in one of Claims 1 to 3, characterised in that at least one mould guide rod (57, 58) coupled to the pedestal (3) and the main frame (2) is provided.
5. A block moulding machine as claimed in Claim 4, characterised in that the mould lifting device (19) is fixed to the mould guide rod (57).
6. A block moulding machine as claimed in one of Claims 1 to 5, characterised in that provided on the main frame (2) there is a ram lifting device for raising and lowering at least one ram (67).
7. A block moulding machine as claimed in Claim 6, characterised in that the ram lifting device (66) includes at least one ram lifting cylinder (70) and/or a ram crossbeam (68).
8. A block moulding machine as claimed in Claim 6 or 7, characterised in that at least one ram guide rod (58) is provided, which is coupled to the pedestal (3) and the main frame (2).
9. A block moulding machine as claimed in Claim 8, characterised in that the ram lifting device (66) is fixed to the ram guide rod (58).
10. A block moulding machine as claimed in one of Claims 4, 5, 8 or 9, characterised in that the mould lifting device (19) is coupled to the ram guide rod (58) and/or the ram lifting device (66) is coupled to the mould guide rod (57).
11. A block moulding machine as claimed in one of Claims 8 to 10, characterised in that two mould guide rods (57) and two ram guide rods (58) are provided parallel to one another, wherein the mould guide rods (57) are arranged diagonally opposite to one another.
12. A block moulding machine as claimed in one of Claims 4, 5 or 8 to 11, characterised in that the mould guide rod (57) and/or the ram guide rod (58) are guided by at least one guide unit (65) in the pedestal (3) and/or in the main frame (2).
13. A block moulding machine as claimed in one of the preceding claims, characterised in that the main frame (2) is lowerable with respect to the pedestal (3) by releasing a main frame fixing unit (9).
14. A block moulding machine as claimed in Claim 13, characterised in that the main frame (2) is fixable to at least one longitudinal guide unit (8) of the pedestal (3) with the main frame fixing unit (9).
15. A method of vertically moving a block moulding machine (1), characterised by the following steps:

    moving a mould lifting device (19) into a position (AS) in which it is supported on a pedestal (3);

    releasing a main frame fixing unit (9) for a main frame (2);

    actuating the mould lifting device (19) such that the main frame (2) is raised;

    and

    tightening the main frame fixing unit (9) for the main frame (2).

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