EP3718646B1 - Plate production system with vibrating device - Google Patents

Description

The invention relates to a panel production plant with a vibrating device.

Such vibrating devices often have to be subjected to vibrations during the production process in order to improve the quality of, for example, concrete slabs. For this purpose, unbalanced elements are often used, which are arranged on an axis of rotation, the axis of rotation being driven by at least one motor. Such imbalance units have the disadvantage that long run-up and run-down times occur. These times and the imbalance movements are difficult to change, especially during ongoing operation. Rather, such imbalance units - after the entire system is brought to a standstill - changed their position by hand in order to generate a new imbalance and thus a new vibration movement.

DE 102 49 551 A1 discloses a vibration generator for vibrating stations of stone molding machines with two unbalanced masses located on one axis, which can be driven via drive shafts of drive motors and can be adjusted relative to one another.

It is therefore the object of the invention to provide a plate production system with a vibrating device which allows an unbalanced movement to be changed at any time.

According to the invention, this object is achieved by a jogging device for a board production plant according to claim 1 .

By arranging two unbalanced masses, which can also be changed in their position relative to one another and, in which the speed of the motors can be changed independently of one another, both the adjustment the vibration in its frequency and in its amplitude and also allows the avoidance of undesirable vibration phenomena.

Such vibrators are commonly placed beneath a dosage form, often arranged in a plurality on a common turntable, so that each vibrator can differentially vibrate a dosage form associated with it. As a result, for example, circular vibrations with a changed frequency and different amplitudes, possibly with frequency modulation and amplitude modulation, are possible, as well as directed vibrations that allow a change in frequency.

The essential feature of arranging at least two rotatably mounted imbalance masses along a common imaginary central axis, with their rotational positions being variable relative to one another, means that a space-saving arrangement and design of such a vibrating device is possible. In addition, this vibrating device can be operated continuously by changing the rotational position of the unbalanced masses relative to one another, even if vibration of the dosage form is not desired at the moment. However, a vibration with maximum amplitude and possibly maximum frequency can also be obtained on the opposite side by simply changing the rotational position of the unbalanced masses in relation to one another.

Such vibrating devices are usually used not only for the production of the entire panel, but also for the distribution of a facing material within metering molds, in which the panels of facing material and backing concrete are then produced. The vibrating device, which can be arranged below a vibrating plate, can generate vibration phenomena that can be generated either in a locally limited position or in a number of pressing positions, such as vibration in different positions on a turntable.

The first unbalanced mass preferably has a through-opening running in the direction of rotation, which is suitable for at least partially accommodating the rotatable second unbalanced mass. In this way, the second unbalanced mass can be accommodated within the first unbalanced mass and a vibration with a maximum amplitude can thus be achieved. The frequency is set by the associated motors. For this is the first unbalanced mass can be driven in rotation by a first motor and the second unbalanced mass can be driven in rotation by a second motor. This has the consequence that the first unbalanced mass - if desired - can have a different speed than the second unbalanced mass. However, they can also both have the same speed, provided that both motors are matched to one another in their rotational movement by means of a control device.

The unbalanced masses have a cross section perpendicular to the central axis, which corresponds to the basic shape of a segment of a circle. However, it is also conceivable for the cross section of the unbalanced masses to have any other basic shape. For example, this can be the basic shape of a rectangle or a hammer-like shape. In principle, any basic shape for the formation of unbalanced masses is conceivable with regard to their cross section and also their longitudinal and width direction.

The first unbalanced mass and the first motor are connected to one another either on a common first rotary shaft or at least by two first rotary shafts. However, these first rotary shafts are not arranged parallel to each other but are axially connected to each other. Likewise, the second unbalanced mass and the second motor have second rotating shafts that are connected to one another, or they can be connected to one another with a common second rotating shaft.

The first and second rotary shafts are arranged on the common central axis, so that—if you consider the vibrating device as a whole—the first unbalanced mass is driven from one side and the second unbalanced mass is driven from the other side by means of a motor in each case. The motors can here be servo motors. The imbalances of these imbalance masses, ie the imbalance of the first imbalance mass and the imbalance of the second imbalance mass, are preferably of equal magnitude. This means that although they do not necessarily have to have the same masses, they do have the same degree of imbalance in their effect.

If the unbalanced masses, which can also be referred to as unbalanced elements, are designed in their basic form as circular segments, it is conceivable that the lengths of the unbalanced masses viewed in the circumferential direction can be of the same size running on a circular path. However, they can also be of different lengths.

Advantageously, both the first and the second unbalanced mass can be rotated to the left and to the right by means of the motor. The consequence of this is that with a rotational movement directed in the same direction, a circular vibration is generated by means of the vibrating device and the dosage form connected directly or indirectly thereto. However, the two unbalanced masses can also be rotated in opposite directions, so that a directed vibration can be transmitted to the dosage form by means of the vibrating device.

The unbalanced masses can preferably be set at different angles of rotation relative to one another and can be rotated relative to one another in the same or in the opposite direction at a fixed or continuously variable angle of rotation. The angle of rotation can be changed within milliseconds during operation by slowing down or accelerating one or both motors.

The different angular settings of the unbalanced masses relative to each other are used to optimally adjust the imbalance and thus the oscillation or vibration that is to be transmitted to the dosage form, in order to then continue to generate the same vibration with the fixed angular setting. However, it can also be used to enable an optimal start-up of the plate production by starting with a low frequency and a low amplitude through suitable rotational angle settings of the two unbalanced masses in relation to one another and then using a higher frequency and/or or choose a higher amplitude. The frequency is determined by the servo motors, while the amplitude is determined by the rotational position of the unbalanced masses in relation to one another.

An adjustment is also possible during operation.

In principle, such a vibration generated by a vibrating device can be used to optimize a dosing process within the dosing form, to distribute the facing material and to obtain optimal ventilation within the panel material during production.

Further advantageous embodiments result from the following description in connection with the figures.

• Fig. 1 in einer schematischen Darstellung, eine Plattenproduktionsanlage mit einem Drehteller und einer Mehrzahl an Dosierformen;
• Fig. 2 in einer Querschnittsdarstellung, einen Drehteller einer Plattenproduktionsanlage zusammen mit einer erfindungsgemäßen Rütteleinrichtung;
• Fig. 3 in einer perspektivischen Darstellung eine Rütteleinrichtung gemäß einer Ausführungsform der Erfindung;
• Fig.4 die in Fig. 3 gezeigte Rütteleinrichtung in Explosionsdarstellung;
• Fig. 5a, 5b, 5cmögliche Drehstellungen von Unwuchtmassen der erfindungsgemäßen Rütteleinrichtung zur Erzeugung einer Kreisschwingung; und
• Fig. 6a, 6b, 6c, 6d mögliche Drehstellungen der Unwuchtmassen der erfindungsgemäßen Rütteleinrichtung zur Erzeugung einer gerichteten Schwingung.

Here show:

• 1 in a schematic representation, a plate production system with a turntable and a plurality of dosage forms;
• 2 in a cross-sectional view, a turntable of a plate production system together with a vibrating device according to the invention;
• 3 in a perspective view, a vibrating device according to an embodiment of the invention;
• Fig.4 in the 3 vibrating device shown in an exploded view;
• Figures 5a, 5b 5c possible rotational positions of unbalanced masses of the vibrating device according to the invention for generating a circular vibration; and
• Figures 6a, 6b, 6c, 6d possible rotational positions of the unbalanced masses of the vibrating device according to the invention for generating a directional vibration.

In 1 is viewed from above, a plate production system 1 with a turntable that can rotate about an axis 10 in the direction of arrow 9, is shown. This turntable has a plurality of stations 2, 3, 4, 5, 6, 7, 8, these individual stations also containing dosage forms in which the plate material is introduced and is treated differently in the various stations. For example, a pressing process takes place, a shaking process, the introduction of a facing material, the introduction of the backing concrete material, etc.

In 2 is a cross-sectional view of in 1 shown turntable shown in cross section with the vibrating device according to the invention. As can be seen from this illustration, this is a section 11 which shows a dosage form 12 with a vibrating device 16 arranged centrally underneath. The turntable or table 13 is connected by means of buffers and spring elements 20a and 20b and mold lifting cylinders 14a, 14b to a base frame, which also includes the dosage form 12, which can oscillate relative to the table 13. The vibrating device is for this 16 is firmly connected to the dosage form 12 via plates 17, 18, 19 and executes vibrations by means of a rotary movement, which vibrations are thus transmitted to the dosage form 12. The vibrating device is arranged inside the base frame or an enclosure 15 for better protection from external influences.

In addition to a first and second motor 21a, 21b, the vibrating device 16 has two unbalanced masses or unbalanced elements 22, 23, which are described in more detail below.

In 3 the vibrating device 16 is shown in more detail in a perspective view. It can be seen from this representation that the vibrating device consists of the first and second unbalanced masses 22, 23, which are each connected at the end to a servomotor 21a, 21b. A coupling element 26, 27 is arranged between a motor and an associated unbalanced mass.

All elements are arranged along an imaginary common central axis 24 . The angle of the two unbalanced masses 22, 23 can be changed relative to one another, as shown by the reference number 25, by changing their rotational position using the drive motors 21a, 21b.

In 4 is the vibrating device according to the invention 3 shown in the exploded view. It can be seen from this illustration that the first unbalanced mass 22 is assigned the first servomotor 21b, which is firmly connected to the unbalanced mass 22 by means of an associated rotary shaft section 29a, which engages in a rotary shaft section 29b. As a result, the first rotary motor 21b can drive the unbalanced mass 22 in rotation. The clutch 26 and an associated clutch housing 26a can also be seen in this illustration. Both components are arranged between the servo motor and the first unbalanced mass 22 . Similarly, on the right-hand side, the second servo motor 21a is connected to the second unbalanced mass 23 via the second rotary shaft section 28a, 28b. The clutch 27 and a clutch housing 27a are arranged in between.

In addition, a vibrating housing for receiving the unbalanced masses is shown in the middle.

A control device 30 is able to control the rotary motors 21a, 21b in their direction of rotation and in their speed, depending on or independently of one another.

As can be clearly seen from the illustration, the first unbalanced mass 22 has a through-opening 22a, in which the second unbalanced mass 23 can also be accommodated in a specific rotational position. Their effect is described below with reference to Figures 5a to 5c and Figures 6a to 6d in more detail.

In the Figures 5a, 5b and 5c different rotational positions, which are maintained permanently or can also change continuously, are shown for the two unbalanced masses. In Figures 5a - 5c a circular oscillation is essentially generated by means of frequency and amplitude modulation.

If one can assume that both unbalanced masses 22, 23 have the same unbalance, a 180° position according to FIG Figure 5a the same unbalance acts in both directions and thus no vibration is transmitted to the dosage form even with a rotating vibrating device.

In Figure 5b on the other hand, both unbalanced masses 22, 23 are arranged on the same side or one inside the other, as is possible when the second unbalanced mass 23 is positioned inside the first unbalanced mass 22 inside the cavity 22a. The consequence of this is that the two imbalances of the two unbalanced masses are added and thus a vibration with a maximum possible amplitude is generated.

In Figure 5c on the other hand, a position of the unbalanced masses is shown which differs in terms of its amplitude from the illustrations in accordance with Figures 5a and 5b positions differs. For this purpose, the second unbalanced mass 23 is in a specific rotational position relative to the first unbalanced mass 22 according to the rotational angle 25 (cf. 3 ) in order to obtain a desired adjustment of the amplitude in combination with the frequency.

In the Figures 5a - 5c reproduced direction of rotation of the two unbalanced masses, namely a common direction of rotation, is used to generate a circular vibration.

Opposite is in Figures 6a - 6d a directed oscillation is shown. For this purpose, both unbalanced masses 22 and 23 are rotated or rotated in opposite directions to one another, as can be seen from the direction of the two arrows shown. Resulting forces produce a vibration directed in the direction of the resultant force vector, which can serve to produce a vibration in a specific direction at a specific position of the dosage form.

It will be appreciated that improvements and modifications can be made to the present invention as described in detail above without departing from the scope of the invention which is disclosed in the appended claims.

Reference List

1

plate production plants

9

arrow direction

10

axis

11

cutout

12

dosage form

13

turntable

14a

mold lifting cylinder

14b

mold lifting cylinder

15

enclosure

16

vibrating device

20a

spring element

20b

spring element

21a

first motor/servo motor

21b

first motor/servo motor

22

unbalance mass

22a

passage opening

23

unbalance mass

24

central axis

25

angle of rotation

26

coupling element

27

coupling element

27a

clutch housing

28a

second rotary shaft

28b

second rotary shaft

29a

second rotary shaft

29b

second rotary shaft

30

control device

Claims (6)

1. Slab production plants (1) with a vibrating device (16) with at least one dosing mould (12) to receive slab material, wherein the at least one vibrating device (16) arranged below the dosing mould (12) has along a common imaginary centre axis (24) at least two rotatably mounted unbalanced masses (22, 23), the rotated positions of which are changeable relative to one another, wherein the first unbalanced mass (22) is driven in rotation by a first motor (21b) and the second unbalanced mass (23) is driven in rotation by a second motor (21a), wherein the angle of the two unbalanced masses (22, 23) relative to one another can be changed as their rotated position is changed by the drive motors (21a, 21b), and wherein the first unbalanced mass (22) and the first motor (21b) have first rotary shafts (29a, 29b) connected to one another and the second unbalanced mass (23) and the second motor (21a) have second rotary shafts (28a, 28b) connected to one another, and the first and second rotary shafts (28a, 28b, 29a, 29b) lie on the common centre axis (24), wherein a control device (30) is provided which is capable of controlling the direction of rotation and the speed of the rotary motors (21a, 21b) independently of one another.
2. Slab production plants according to claim 1, characterised in that the first unbalanced mass (22) has a through opening (22a) which runs in the direction of rotation and is suitable for at least partially receiving the rotatable second unbalanced mass (23).
3. Slab production plants according to any one of claims 1-2, characterised in that the unbalanced masses (22, 23) have, perpendicular to the centre axis (24), a cross-section which corresponds to the basic shape of a segment of a circle.
4. Slab production plants according to any one of the preceding claims, characterised in that both the first and also the second unbalanced mass (22, 23) are rotatable both to the left and also to the right by means of the motors (21a, 21b).
5. Slab production plants according to any one of the preceding claims, characterised in that the unbalanced masses (22, 23) can be set with different angles of rotation relative to one another and are rotatable with a fixed or continuously changeable angle of rotation (25) relative to one another in the same direction or the opposite direction.
6. Slab production plants according to any one of the preceding claims, characterised in that the amplitudes and/or the frequencies of the rotating unbalanced masses are continuously changeable together or independently of one another, even during the operation of the vibrating device (16).

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