DE102016119956B4 - Press for the continuous production of material plates and methods for steel strip control in such a press - Google Patents

Abstract

The invention relates to a press for continuous production and a method for steel strip control in a press 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), which are guided around a press table (10) or Preßbär (12) and which are guided on revolving, with their axes transverse to the strip running direction rolling rods (28) on the press table (10) and Preßbär (12) Preßplatten (16 ). In each case in the Preßbär (12) and press table (10) transversely to the production direction in the inlet region of the press via an adjustable actuator drive (30), with a shaft mounted therein (34) with gears (36) for guiding the rolling rods (28) The press is characterized in that in the area of the press plates (16) a sensor system (48, 50) for measuring the thrust force acting parallel to the axis of the rolling bars (28) on the press plates (16) arranged as abutments for the rolling bars (28) ) and / or the axial course of the rolling rods (28) is arranged 1536.

Description

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

The invention further relates to a method for steel strip control in such a press according to the preamble of claim 3.

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 pressing 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 out EP 1 484 169 A2 , of the DE 44 08 099 A1 and 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 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 belts then tend to bowl and almost come into contact with each other in the pressing area. As a result, the contact signal is falsified at the steel strip edges.

The object of the invention is to remedy these disadvantages and to provide a press and a method for steel strip control, which has a precise, störunanfällige sensors for controlling the steel strip conveyor respectively the feeders for the rolling rods.

The task solving press is characterized in that in the region of the press plates, a sensor for measuring the thrust force acting parallel to the axis of the rolling rods is arranged on the press plates arranged for the rolling rods as an abutment.

Particularly preferred in the press, a control or regulating device is arranged in operative connection with the sensors and the actuators of the inlet drive to adjust the orthogonal inlet or a slightly different by the control and regulating device angle to the orthogonal inlet of the rolling rods at the inlet.

The object of the method for steel strip guide is that at least one thrust force acting parallel to the axis of the rolling bars on the press plates arranged as abutments for the rolling bars are detected by means of a sensor system.

Particularly preferably, a control or regulating device will process the measured values of the sensor system and output nominal values for the insert drive or the position of the insert drive to the corresponding actuators of the insert drive and / or the actuators for the drive drums.

In a further preferred embodiment, the separate measured values of the press table and the press bear are preferably offset in the control or regulating device with the specification that the difference of the shear forces and / or the course, preferably increasingly, cancel each other out.

In a particular embodiment, the feeder unit is adjusted as a complete unit and not, as in the prior art, only the shaft. As a result, the rolling bars always maintain the same distance, and it is a one-sided clamping prevented. The input drive has in the preferred Embodiment on a movable frame in which the shaft is mounted to align the rolling rods.

In a further embodiment, at least one further guide device for guiding and / or aligning the rolling rods can be arranged on the frame of the insert drive. 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 on both sides of the frame of the feeder unit and each other's other effective side are arranged on the press, wherein the feeder unit is preferably movable along a linear guide. The adjustment of the insert drive 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.

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

• 1 eine kontinuierlich arbeitende Presse in schematischer Seitenansicht;
• 2 als Einzelheit ein Einlaufwerk der Presse nach 1;
• 3 eine Vorderansicht des Einlaufwerks;
• 4 eine Einzelheit des Einlaufwerks im Bereich der Anbindung an die Presse nach 3;
• 5 einen Querschnitt durch die Presse bei einem als ideal angenommenen mittensymmetrischem Lauf von deren Stahlbändern;
• 6 einen Querschnitt durch die Presse bei Verlauf von deren Stahlbändern aus der Mittensymmetrie;
• 7 eine schematische Draufsicht auf die Presse nach 1 mit Darstellung einer Stellung des Einlaufwerks bei orthogonalem und davon winkeligem Einlauf der Rollstangen in die Presse.

Show it:

• 1 a continuously operating press in a schematic side view;
• 2 as a detail an input drive of the press after 1 ;
• 3 a front view of the feeder;
• 4 a detail of the feeder unit in the area of the connection to the press 3 ;
• 5 a cross section through the press in a supposedly symmetrical center-symmetrical run of their steel bands;
• 6 a cross section through the press in the course of their steel bands from the center symmetry;
• 7 a schematic plan view of the press after 1 showing a position of the inlet drive in orthogonal and angular angular entry of the rolling rods in the press.

In the 1 shown continuously working press has a fixed lower press table 10 and a movable upper press bear 12 , press table 10 and Preßbär 12 are equally of juxtaposed press racks 14 formed, the heatable and / or coolable press plates 16 wear; the latter form the length of press table 10 and Preßbär 12 , About the press plates 16 are circumferential steel bands 18 led up and down, at the beginning of the press on deflection drums 20 and exit of the press via drive drums 22 run and the press nip for the pressed material to be pressed 24 form. The tail pulleys 20 and the drums 22 are equipped with adjusting mechanisms with which the steel bands 18 strained and the steel strip 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 bands 18 are on circulating guide chains 26 guided, moving rolling rods 28 inserted. The roll bars 28 thus form a revolving Rollstangenteppich 25 , which for the rolling support of the steel strips against the press plates 16 provides. The roll bars are preferred 28 on both sides via spring bars 27 with guide chains 26 connected (cf. 3 ).

2 shows in an enlargement of the upper inlet area an infeed 30 at the beginning of the press. With the help of the inlet drive 30 become the rolling rods 28 about gears arranged therein 36 aligned and guided in the clamping area between steel strip 18 and the press plate 16 brought in. Generally, the roll bars take 28 an orthogonal position to the strip running direction of the steel strips 18 one. By suitable adjustment of the infeeds 30 However, there is the possibility of deviating from the orthogonality in order to influence the steel strip conveyor in the sense of fine regulation.

The infeeds 30 are usually with more, only hinted leadership facilities 38 for the rolling rods 28 Mistake. These may be baffles, guide shoes and so on.

In 3 is a schematic front view of a feeder 30 , preferably stored on a press frame 14 represented.

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

In the preferred embodiment, the complete enema is 30 consisting of a frame 52 , one in the frame 52 stored wave 34 stored in a machine bed or at the press. The machine bed for the input drive 30 is here as part of the press frame 14 realized, 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, the press frame, which serves as a machine bed, follows the movement of the inlet area with easy. Leitbleiche 54 , as a management facility 54 or part of it, make sure that the rolling rods 28 neat inside the gears 36 remain and thus be guided and aligned.

In an enlarged view shows 4 a possible embodiment for the connection between the input drive 30 , respectively the frame 52 to the press frame 14 , This is with two double-sided threaded bolt 40 executed, which by bearing eyes 42 at the frame 52 are guided. On the threaded bolts 40 is a plate spring package 44 plugged in, which is the input drive 30 against the press frame 44 braced. There is the possibility of the plate spring package 44 with washers to compensate for dimensional tolerances and the infeeds 30 einjustieren in a basic position, in which the roll bar axes orthogonal to the strip running direction of the steel bands 18 are aligned.

In a preferred embodiment can now via a drive 56 the threaded bolt 40 twisted and the location of the frame 52 opposite the press frame 14 to be changed. Advantageously, the position of the shaft thus changes even with a corresponding arrangement 34 such that the rolling rods 28 not orthogonal but running at a slight angle to the orthogonal in the press. 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, which is not illustrated, the presses are actuators on both sides 56 arranged for a two-sided adjustment of the frame 52 and thus the input drive 30 to draw responsibly. But it can also be provided other adjustment means, directly on the machine bed and / or the frame 52 attack, 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 5 to 7 shown.

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

In 6 tend the roll bars 28 of the input drive on the press table 10 with the steel band 18 to go to the right. This causes the press plates 16 pressed in the opposite direction to the left. The roll bars 28 at the Preßbär 12 while running 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 using a suitable sensor 48 detected. Alternatively, a direct detection of the press plates 16 acting thrust forces possible. The emigration of the rolling rods leaning against the orthogonal 28 can also with a sensor 50 be detected. In general, however, it is sufficient, the axis of the rolling bars 28 Sensory to detect what can happen mechanically or visually.

To return to the ideal mittensymmetrischen strip according to 5 To get it, it is recommended, the difference of the shear forces on the press plates 16 from press table 10 and Preßbär 12 to zero out.

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 the press plates 16 perform under the pushing forces. In addition, a measurement of the axis course of the rolling rods is recommended 28 and control of the band history thereafter. It can be assumed that the steel bands 18 the roll bars 28 consequences.

By adjusting the infeeds 30 at press table 10 and Preßbär 12 at least on one side, horizontally in or against the strip running direction of the steel strips 18 , depending on the roll bar, the rolling bars 28 in the inlet at an angle to the orthogonal to the steel strip 18 introduced (cf. 7 ). The lateral forces of the sloping incoming roll bars 28 on the steel band 18 leave the steel band 18 walk back to the middle position. The lateral forces of the rolling rods 28 exert a transverse thrust on the press plates 16 at press table 10 and Preßbär 12 which can be measured with the help of force sensors, a position measuring system and so on. By adjusting the infeeds 30 at press table 10 and Preßbär 12 and the corresponding inlet of the rolling bars 28 is the difference of the shear forces on the press plates 16 minimized.

Ideally, the press plates 16 almost free of thrust when the roll bars 28 and with it the steel bands 18 almost without lateral offset, ie without course, run in the middle through the press. Thus, the adjustment of the inlet drives 30 from press table 10 and Preßbär 12 by measuring the transverse thrusts on the press plates 16 be optimized.

The infeeds 30 from press table 10 and Preßbär 12 can be adjusted at least on one side by an angle orthogonal to the longitudinal axis of the press. The integrated management devices 38 for the rolling rods 28 For example, baffles 54 , Roller bar restraints, guide shells and guide rails, are adjusted with, so that the spatial relationships to each other, the internal geometry, and thus the functionality of the roll bar insertion in each position of the inlet drive 30 remains unchanged.

LIST OF REFERENCE NUMBERS

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 (5)

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 transverse to the strip running direction rolling rods (28) on the press table (10) and Preßbär (12) mounted press plates (16), each with a Preßbär (12) and Pressing table (10) arranged transversely to the production direction in the inlet region of the press via actuators adjustable Einlaufwerk (30), with a shaft mounted therein (34) with gears (36) for guiding the rolling rods (28), characterized in that in the region of the press plates ( 16) has a sensor (48, 50) for measuring the parallel to the axis of the rolling rods (28) acting thrust on the for the rolling rods (28) as Widerl Ager arranged press plates (16) is arranged. Press after Claim 1 , characterized in that a control or regulating device is arranged in operative connection with the sensor system (48, 50) and the actuators of the associated infeed unit (30). Method for steel strip guide in a continuous press for the production of 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), which via a press table (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), each with a Preßbär (12 ) and press table (10) arranged transversely to the direction of production in the inlet region of the press via actuators adjustable Einlaufwerk (30), with a shaft mounted therein (34) with gears (36) for guiding the rolling rods (28), characterized in that the steel strip guide at least one parallel to the axis of the rolling rods (28) acting thrust on the for the rolling rods (28) arranged as an abutment press plates by means of a sensor (48, 50) is detected. Method according to Claim 3 , characterized in that a control or regulating device processes the measured values of the sensor system (48, 50) and outputs set values for the inlet drive (30) or the position of the inlet drive (30) to the corresponding actuators. Method according to Claim 3 or 4 , characterized in that the separate measured values of the press table (10) and the press bear (12) are preferably offset in the control or regulating device with the requirement that the difference of the thrust forces preferably cancel each other increasingly.

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