EP3318396A1 - Press for the continuous production of material boards - Google Patents

Abstract

The invention relates to a press for the continuous production of material plates, such as chipboard, fiberboard, plywood or plastic plates, with the pressing pressure transmitted and pressing material to be pressed (24) through the press pulling, flexible, endless steel belts (18) around a press table (18). 10) or Preßbär (12) are guided and supported on revolving, with their axes transverse to the strip running direction rolling rods (28) on the press table (10) and Preßbär (12) mounted press plates (16). In this case, the press is provided with one transverse to the direction of production in the press inlet drive (30), with a frame (52) and a shaft mounted therein (34) with gears (36) for guiding the roll bars (28) in the inlet region of the press , The invention is characterized in that the shaft (34) is mounted stationary in a frame (52), and that for adjusting the position of the frame (52) at least one actuator, preferably a linear actuator, is arranged.

Description

The invention relates to a press for the continuous production of material plates according to the preamble of claim 1.

The invention relates to a press for the continuous production of material plates, such as chipboard, fiberboard, plywood or plastic plates, with the pressing pressure transmitting and the pressed material to be pressed through the press pulling, flexible, endless steel belts which are guided around a press table or Preßbär and which are supported on revolving, guided with their axes transversely to the strip running direction rolling rods on the press table and Preßbär mounted press plates, from.

A relevant press is the DE 199 31 176 B4 known. The endless steel belts are guided at the inlet of the press via deflection drums and at the outlet of the press via drive drums. For coarse control of the steel belt run and resetting of a possible steel belt run, the drive drum axles can be adjusted by means of suitable actuators. Pressing table and Preßbär be formed in the press after juxtaposed press racks carrying heatable and / or coolable press plates. Between the steel belts and the press plates, the circulating, guided in guide chains rolling rods are inserted, which are supported on abutments of press table and Preßbär. The roll bars are coiled between the press plates and the steel belts. They are transferred to the steel strips at the inlet of the press with the infeeds. The Axes of the rolling rods are aligned substantially orthogonal to the strip running direction of the steel strips. The infeeds, however, make it possible to bring the axes of the rolling bars in an angle deviating from the orthogonal inclined position, in order to fine tune the steel strip run and resetting a possible course of the steel strip.

Each input drive after the DE 199 31 176 B4 has a guide shaft equipped with sprockets for the chains that guide the rolling rods. The guide shaft itself is rotatably mounted about a shaft axis on a hinge plate. The hinge plate can be rotated about a central bolt by a small angle to bring the rolling bars in a slight inclination to the orthogonal. For the rotational adjustment is a motor-driven eccentric gear, which acts on the push-pull rods at the two ends of the guide shaft.

The disadvantage is that by the rotational adjustment alone of the guide shaft, the rolling rods are lifted out of guide devices or pressed into guide devices, which are provided for guiding the rolling rods. It may be to baffles, guide shoes u. a. m. act for the rolling rods. There are also problems with the rigidity of the guide shaft. In extreme cases, there is the danger of jamming the rolling rods in the guide uncontrolled and / or tilt. As a result, increased wear and, if necessary, an uncontrollable belt run result, in particular if the introduction means arranged on the guide shaft grind or bend. For the control of the infeeds, steel belt tracking sensors are provided, which make contact at the steel belt edges.

The press has proven itself in principle, but can be further improved. In particular, the production of very thin plates can be error prone. The steel bands then tend to bowl and in the pressing area almost come into contact with each other. As a result, the contact signal is falsified at the steel strip edges.

The object of the invention is to remedy these disadvantages, to improve the leadership of the rolling rods in the infeeds and to create a precise, störunanfällige sensors for controlling the infeeds.

The task solving press is characterized in that the shaft is mounted stationary in a frame, and that for adjusting the position of the frame at least one actuator, preferably a linear actuator, is arranged.

The fact that the feeder is adjusted as a complete unit, the roll bars always maintain the same distance, and it is a one-sided clamping prevented.

In a further embodiment, at least one further guide device for guiding and / or aligning the rolling rods can be arranged on the frame. This guide device may consist of guide plates, which follow the wrap angle of the rolling rods around the gears.

Preferably, the actuator on the press and in the direction of passage of the steel bands is arranged laterally on the frame and the frame is connected on the other side with a fixed bearing on the press. In order to effect an adjustment deviating from the longitudinal center plane of the press, the actuators are arranged outside the center of the frame, ie more in the region of the arranged at the ends of the roll bar guide chain.

Particularly preferred are at least two actuators in the direction of passage of the steel bands 18 are arranged on both sides of the frame 52 of the insert drive 30 and each other's other effective side of the press, the infeed 30 is preferably along a linear guide movable. The adjustment of the insert is preferably along a predetermined guide along which the linear actuators move the frame.

As an actuator, preferably a linear drive, an articulated lever, a spindle drive, a direct drive, a single or double-acting hydraulic cylinder pneumatic or hydraulic design is arranged.

Particularly preferably, the frame and / or the linear actuator should be arranged in a basic position relative to the press, preferably for changing the orientation of the rolling rods starting from the basic position.

Alternatively or in combination, it may also be advantageous if the adjustment of the frame is adjustable by means of fixed stops.

Preferably, a sensor for measuring the shear forces acting parallel to the axis of the rolling rods in a pressure plate and / or sensors for measuring the axial course of the rolling rods are arranged.

Particularly preferably, a control or regulating device is arranged in operative connection with the sensor system and the linear actuators in order to set the orthogonal inlet or an angle slightly deviating by the control and regulating device to the orthogonal inlet of the roller bars at the inlet drive.

The invention is explained in more detail below with reference to an embodiment shown in the drawing.

Fig. 1

eine kontinuierlich arbeitende Presse in schematischer Seitenansicht;

Fig. 2

als Einzelheit ein Einlaufwerk der Presse nach Fig. 1;

Fig. 3

eine Vorderansicht des Einlaufwerks;

Fig. 4

eine Einzelheit des Einlaufwerks im Bereich der Anbindung an die Presse nach Figur 3;

Fig. 5

einen Querschnitt durch die Presse bei einem als ideal angenommenen mittensymmetrischem Lauf von deren Stahlbändern;

Fig. 6

einen Querschnitt durch die Presse bei Verlauf von deren Stahlbändern aus der Mittensymmetrie;

Fig. 7

eine schematische Draufsicht auf die Presse nach Figur 1 mit Darstellung einer Stellung des Einlaufwerks bei orthogonalem und davon winkeligem Einlauf der Rollstangen in die Presse.

Show it:

Fig. 1

a continuously operating press in a schematic side view;

Fig. 2

as a detail an input drive of the press after Fig. 1 ;

Fig. 3

a front view of the feeder;

Fig. 4

a detail of the feeder unit in the area of the connection to the press FIG. 3 ;

Fig. 5

a cross section through the press in a supposedly symmetrical center-symmetrical run of their steel bands;

Fig. 6

a cross section through the press in the course of their steel bands from the center symmetry;

Fig. 7

a schematic plan view of the press after FIG. 1 showing a position of the inlet drive in orthogonal and angular angular entry of the rolling rods in the press.

In the FIG. 1 shown, continuous press has a fixed lower press table 10 and a movable upper Preßbär 12 press table 10 and Preßbär 12 are equally formed of juxtaposed press racks 14 which carry heatable and / or coolable press plates 16; The latter form the length of press table 10 and Preßbär 12. About the press plates 16 circulating steel belts 18 are guided above and below, run at the beginning of the press on idler pulleys 20 and output of the press on drive drums 22 and form the press nip for the pressed material 24 to be pressed. The idler pulleys 20 and the drive drums 22 are provided with adjusting mechanisms with which the steel belts 18 can be tensioned and the steel belt run can be influenced. This acts in the sense of a coarse control of the steel strip run. Between the press plates 16 and the steel strips 18 guided on revolving guide chains 26, follower rolling rods 28 are inserted. The rolling bars 28 thus form a revolving roll bar carpet 25, which provides for the rolling support of the steel strips against the press plates 16. Preferably, the rolling rods 28 are connected on both sides via spring rods 27 with guide chains 26 (see. FIG. 3 ).

FIG. 2 shows in an enlargement of the upper inlet area an infeed 30 at the entrance of the press. With the help of the infeed 30, the rolling rods 28 are aligned there through arranged therein gears 36 and guided in the clamping area between the steel strip 18 and the pressure plate 16 is introduced. In general, the rolling bars 28 take an orthogonal position to the tape running direction of the steel belts 18. By suitable adjustment of the feeders 30 but it is possible to deviate from the orthogonality in order to influence the steel strip conveyor in the sense of a fine control.

The infeeds 30 are usually provided with further, only indicated guide means 38 for the rolling rods 28. It may be baffles, guide shoes u. a. m. act.

In Fig. 3 is a schematic front view of an infeed 30, preferably stored on a press frame 14, shown.

In the infeeds 30, the guide chains 26 run on the outside of the rolling rods 28 via sprockets 32, which are arranged at the ends of a guide shaft 34. Between the sprockets 32, the shaft 34 is equipped with gears 36, in the teeth of the rolling rods 28 come to rest, to be aligned accordingly.

In the preferred embodiment, the complete drive-in unit 30, consisting of a frame 52, a shaft 34 mounted in the frame 34 is mounted in a machine bed or on the press. The machine bed for the infeed 30 is realized here as part of the press frame 14, but can also be designed differently. In particular, the inlet region of the press in height to adjust a compression angle can be adjusted in height. The infeed unit will either be integrated in this adjustable inlet area or its machine bed or attachment to the press frame will follow this adjustment. Particularly preferably follows the press frame, which serves as a machine bed, the movement of the inlet area with easy. Guiding bleach 54, as guide means 54 or part thereof, ensure that the roll bars 28 remain neatly within the gears 36 and thus can be guided and aligned.

In an enlarged view shows FIG. 4 a possible embodiment for the connection between the inlet drive 30, respectively the frame 52 to the press frame 14. This is carried out with two double-sided threaded bolt 40, which are guided by bearing eyes 42 on the frame 52. On the threaded bolt 40, a plate spring package 44 is attached, which clamps the feeder unit 30 against the press frame 44. It is possible to underlay the plate spring package 44 with washers to compensate for dimensional tolerances and einjustieren the feeders 30 in a basic position in which the roll bar axes are aligned orthogonal to the strip running direction of the steel belts 18.

In a preferred embodiment, the threaded bolt 40 can now be rotated via a drive 56 and the position of the frame 52 relative to the press frame 14 can be changed. In an advantageous manner, the position of the shaft 34 changes, even with a corresponding arrangement, in such a way that the roller bars 28 do not enter the press orthogonally but at a slight angle to the orthogonal one. This adjustment is preferably carried out automatically via corresponding control and regulation systems (not shown) automatically and on the basis of measured values.

In a further particularly preferred embodiment, however, not shown, the press drives 56 are arranged on both sides, which are responsible for a two-sided adjustment of the frame 52 and thus of the insert drive 30. But it can also be provided other adjustment means which act directly on the machine bed and / or the frame 52, such as hydraulic cylinders or other suitable linear actuators.

The influence that the inclination of the infeeds 30 against the orthogonal to the strip running direction of the steel strips 18 has, is in the FIGS. 5 to 7 shown.

In FIG. 5 the tape is ideally mid-symmetrical. The rolling bars 28 are inserted orthogonally and run under optimal pressing conditions. However, basis weight fluctuations or density differences in the pressed material 24 can lead to a running of the rolling rods 28 and the steel strip 18.

In FIG. 6 The rolling rods 28 of the infeed on the press table 10 tend to extend with the steel strip 18 to the right. This results in that the press plates 16 are pressed in the opposite direction to the left. The rolling rods 28 on Preßbär 12, however, run to the left and press the press plates 16 in the opposite direction to the right. The evasive movement of the press plates 16 is detected by a suitable sensor 48. Alternatively, a direct detection of the forces acting on the press plates 16 shear forces is possible. The migration of the inclined against the orthogonal rolling rods 28 can also be detected with a sensor 50. In general, however, it is sufficient to sense the axis of the rolling bars 28 sensory, which can be done mechanically or optically.

To return to the ideal mittensymmetrischen strip according to FIG. 5 to arrive, it is recommended to regulate the difference of the thrust forces on the press plates 16 of press table 10 and Preßbär 12 to zero.

The measurement of the thrust forces can be made directly with a force sensor or indirectly with a displacement sensor based on the evasive movement that make the press plates 16 under the shear forces. In addition, it is recommended to measure the axis course of the rolling rods 28 and to control the course of the belt thereafter. It can be assumed that the steel strips 18 follow the rolling rods 28.

By adjusting the infeeds 30 to press table 10 and Preßbär 12, at least on one side, horizontally in or against the tape running direction of the Steel belts 18, depending on the roll bar profile, the rolling rods 28 are introduced in the inlet at an angle to the orthogonal to the steel strip 18 (see. FIG. 7 ). The transverse forces of the obliquely incoming rolling rods 28 on the steel strip 18 allow the steel strip 18 to run back into the middle position. The transverse forces of the rolling rods 28 exert a transverse thrust on the press plates 16 on press table 10 and Preßbär 12, which can be measured with the aid of force sensors, a position measuring system, etc. By adjusting the feeders 30 to press table 10 and Preßbär 12 and the corresponding inlet of the rolling rods 28, the difference of the thrust forces on the press plates 16 is minimized.

Ideally, the pressing plates 16 are almost free of shear forces when the rolling rods 28 and thus the steel belts 18 run almost without lateral offset, ie without course, centrally through the press. Thus, the adjustment of the feeders 30 of press table 10 and Preßbär 12 can be optimized by measuring the transverse thrusts on the press plates 16.

The feeders 30 of press table 10 and Preßbär 12 can be at least one side adjusted by an angle orthogonal to the longitudinal axis of the press. The integrated guide means 38 for the roll bars 28, such as baffles 54, roll bar restraints, guide shells and guide rails, are adjusted so that the spatial relationships to each other, the internal geometry, and thus the functionality of the roll bar entry in each position of the infeed 30 remains unchanged.

Reference 1535:

10

press table

12

press ram

14

press frame

16

press plate

18

steel strip

20

Umlenktrommel

22

driving drum

24

compressed material

25

Roll bar carpet

26

guide chain

27

spring bar

28

roll bar

30

infeed station

32

Sprocket

34

wave

36

gear

38

guide means

40

threaded bolt

42

bearing eye

44

Belleville spring assembly

48

sensors

50

sensors

52

frame

54

baffle

56

drive

Claims (9)

Press for the continuous production of material plates, such as chipboard, fiberboard, plywood or plastic plates, with the pressing pressure transmitting and pressing material to be pressed (24) through the press pulling, flexible, endless steel belts (18) around a press table (10) or Preßbär (12) are guided and supported on revolving, with their axes transversely to the strip running direction guided rolling rods (28) on the press table (10) and Preßbär (12) mounted press plates (16),
each having an input drive (30) arranged transversely to the production direction in the press, with a frame (52) and a shaft (34) mounted therein with gears (36) for guiding the rolling rods (28) in the inlet region of the press,
characterized,
that the shaft (34) is mounted stationarily in a frame (52), and that at least one actuator, preferably a linear actuator, is arranged to adjust the position of the frame (52). Press according to claim 1, characterized in that on the frame (52) at least one further guide means (38) for guiding and / or alignment of the rolling rods (28) is arranged. Press according to claim 1 or 2, characterized in that the actuator on the press and in the direction of passage of the steel strips (18) is arranged laterally on the frame (52) and the frame (52) is connected on the other side with a fixed bearing on the press. Press according to claim 1 or 2, characterized in that at least two actuators in the travel direction of the steel belts (18) on both sides of the frame (52) of the inlet unit (30) and in each case the other active side are arranged on the press, wherein the inlet mechanism (30) preferably along a linear guide is movable. Press according to one of the preceding claims, characterized in that the actuator is a linear drive, a hinge lever, a spindle drive, a direct drive, a single or double-acting hydraulic cylinder pneumatic or hydraulic design is arranged. Press according to one of the preceding claims, characterized in that the frame (52) and / or the linear actuator are arranged in a basic position relative to the press, preferably for changing the orientation of the rolling rods (28) starting from the basic position. Press according to one of the preceding claims, characterized in that the adjustment of the frame (52) is adjustable by means of fixed stops. Press according to one of the preceding claims, characterized in that sensors (48) for measuring the thrust forces acting parallel to the axis of the rolling rods in a pressure plate (16) and / or sensors (50) for measuring the axial course of the rolling rods (28) are arranged , Press according to one of the preceding claims, characterized in that a control or regulating device is arranged in operative connection with the sensor system and the linear actuators.

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