DE1561621A1 - Device for deflaking for the production of paper, cardboard or the like. certain fiber - Google Patents

Description

OR-INO. OIPL.-INO. M, SC. OIPL.-ΡΗΥΞ. DB. DIPL. · '

HÖGER-STELLRECHT-GRIESSBACH - HAECKER

PATENT LAWYERS IN STUTTGART

File number P 15 6l 621.4-27 35 82Oe

June 26 , 1969 1561621

e - 133

V ^ üsi-l ^ irügo nouo documents

(eingoreic'.l gom. ArI. 7, § 1, Ab $. 2, No.l of the Amendment Act)

Hermann P i n, c k h Metalltuch- und Maschinenfabrik

7410 Reutlingen.
Kaiserstrasse 68

Device for deflaking of fiber material intended for the production of paper, cardboard or the like

The invention relates to a device for defacing fiber material intended for the production of paper, cardboard or the like, in particular waste paper stock, which has a housing provided with stock inlet and outlet and a rotor which revolves in a housing cavity encompassing its circumference with play, in its between its inner surface and the rotor remaining annular gap cross-sectional constrictions are provided, which gradually converge and alternate with abrupt cross-sectional widenings.

In a known device of this type, the arrangement of the items is made so that the to be treated

0098-14 / 0-836

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35 Ö20 e

June 26, 1969

Suspension is not only de-stippled, but also ground. To achieve such a comminuting grinding action, the narrowest clear gap must be kept very small. These small gap width in turn makes it necessary to remove the heavy foreign bodies contained in the supplied suspension, such as paper clips or the like, through a special, Weed out the collecting device connected behind the headbox. Otherwise the crushing elements would do this known design and that for the most part enclosing the rotor Strainer will be damaged. The combination of a deflaking and a grinding process in one and the same The device also has the disadvantage that light foreign bodies, like plastic foils, on the one hand, they do not get into the separator for heavy materials and on the other hand, they pass through the deflaking and grinder must be crushed so that crushed parts can pass the sieve. A subsequent one Sorting out these shredded, light foreign bodies makes considerable difficulties.

The invention is based on the knowledge that the deflaking effect is to be given much greater importance, and that the deflaking device should therefore be designed in such a way that a grinding effect and, consequently, the removal of foreign bodies of any kind in this device should be completely dispensed with . The sorting can be carried out in a simple way in a downstream, open sorter »as is necessary in a device of the previously known design to recover the suspension that has entered the separator and to separate the light foreign bodies that have reached the good side of the separator

such, downstream of the non-grinding deflaking

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June 26, 1969

Sorters are able to pass through heavy foreign bodies and, in a safe and simple manner, also those that have not been shredded Light foreign bodies (plastic sheeting or the like) got through the deflaking device.

To solve the problem on which the invention is based is provided according to the invention that the housing with essentially parallel to each other and head outlet is designed as a rotary pump housing and the rotor as a conveyor disk, and that to form the Cross-sectional constrictions in the conveying gap taper in a wedge-shaped manner in the direction of rotation, possibly roughened on the gap side Shims are attached to the inner surface of the housing between its thicker end and the circumference of the conveyor disc Leave a clear, narrowest conveyor gap, measured in the radial direction, of at least ten millimeters.

With this novel design of the deflaking device, because of the rotary pump-like housing, a very large Part of the circumference of the rotor for the actual operation be exploited and especially because of the training of the rotor As a conveyor disc, a very high conveying speed of the supplied goods can be achieved. The higher the conveyor speed is, the higher is the one acting on the material to be conveyed Change between narrowing and widening of the conveyor gap, i.e. the frequency of the pulsating pressures in the suspensions to be removed. But because according to the invention between the thick end of the wedge-shaped inserts and the circumference of the conveyor disk a narrowest conveyor gap width of at least ten millimeters is maintained Foreign bodies, be they heavy objects such as staples or the like, or light ones, without reducing the defacification effect film-like foreign bodies, not comminuted and free, above all

-H-

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June 26, 1969 156 16 zl

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without damaging the pump parts by the deflipping device get through.

Tests of the device designed according to the invention have shown that there is a particularly good deflaxing performance, if it is provided that the drive speed of the conveyor disk increases the conveyor speed from etxira 1 m / sec at the head inlet to about 100 to 120 m / sec is coordinated at the narrowest points of the conveyor gap.

It is also important for the deflaking of firmly adhering, so wet-strength parts, if it is provided that the consequence of alternating cross-sectional constrictions to widening of the conveyor gap at a given circumferential speed the conveyor disk is set to an alternating frequency of about 2 to 6 Khz.

To ensure the desired conveying speed, it also makes a significant contribution that the conveying disk over the entire circumference has a shape intended to accelerate the material, e.g. can be provided with a row of teeth.

An embodiment of the invention is shown in the drawing and explained in the following description. Show it:

Figure 1 shows a cross section through the deflaking device (the section is along the cutting line 1-1 in Fig. 2);

.Fig. 2 shows a side view of this (the one in this side view cut deflaker is shown along section line 2-2 in FIG. 1;

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June 26, 1969 iccioi

Pig. 3, on an enlarged scale, a portion of the gap delimiting pieces converging to the gap narrowing. -

For the drive of the defrosting device there is one on a base 11 standing electric motor. 12 provided. On the protruding from the motor housing stub 13 of the motor shaft is with With the aid of a hub 14a, a narrow conveyor disk 1 * 1 is non-rotatable appropriate.

This conveyor disk Ik is surrounded by a housing which in turn consists of a main housing part 15 and a housing cover 16 closing off this main housing part 15. In the main housing part 15, a ^{housing cavity 15a is provided which encloses the conveyor disk I 1} J as tightly as possible, but with little play. A nozzle-shaped head inlet 15b and head outlet 15c open in the tangential direction into this hollow space, which has an approximately circular outline.

The housing cavity 15a is arranged in its outline concentrically to the axis of rotation of the conveyor disk Ik . The gap remaining between the inner circumference of the cavity and the circumference of the conveyor disk is narrowed in the region of the shorter distance between the two supports 15b and 15c by an insert 19 so that only a small amount of play remains between this insert and the circumference of the conveyor disk Ik , which is directed towards the Arrow C revolves.

Enclosures 17 are also attached to the larger section of the part of the inner circumference of the cavity 15a located between the inlet connections 15b and 15c, as seen in the direction of rotation of the disk Ik. These only record one fraction

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part of this peripheral piece of the cavity 15a and also have a distance between them. They are designed as segments that have the cross-section of a curved wedge. They leave an ample passage gap between them and the circumference of the conveyor disk Ik , which, however, is in the area of these segments up to a still quite considerable minimum width of the gap serving as the conveyor gap narrowed. With this arrangement and design of the segments, the clear cross-section of the conveyor gap running in the direction of rotation of the conveyor disk Ik narrows in constant change to a minimum width indicated at χ and then suddenly expands again to the maximum width of the conveyor gap.

The disk Ik - supported by the row of teeth l * »b provided on its circumference - or some other suitable circumferential roughening - is provided by the connecting piece 15b ζJB. at a speed of 1 m / sec incoming material at points χ increased to a conveying speed of 100 to 120 m / sec. During the passage through the conveying gap remaining between the circumference of the conveyor disk Ik and the inner circumference of the cavity 15a or the segments 17, the conveyed material is compressed to a certain amount in constant change when it brushes along the segments 17 and then suddenly relaxed again behind the segments . This alternation between gradual compression and rapid relaxation can be adjusted in its frequency as desired by the choice of the number of segments 17 provided in coordination with the peripheral speed of the conveyor disk Ik , an alternating frequency of 2 to 6 Khz having proven to be favorable. The gap width χ in the area of the narrowest gap points is narrowed to 10 to 25 mm in the exemplary embodiment.

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35 82Oe

June 26, 1969 I OD I

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For the sealing of a central opening 15d of the main housing part 15 with respect to the housing cavity 15a, an annular seal 18 cooperating with the conveyor disk 1H designed as an uninterrupted plate is provided in the main housing part 15. On the other side, the housing cavity 15a is sealed by the cover, which likewise has no openings.

From Fig. 3 it can be seen that the segments 17 are provided with a roughening 17a on their side facing the gap 2u.

009814/0836

Claims (3)

June 26, 1969 e -133 156162Ί - claims 1. Device for deflaking for the production of paper, Cardboard or the like. Certain fibrous material, in particular waste paper material, which is provided with a material inlet and outlet Has housing and a rotor which rotates in a housing cavity encompassing its circumference with play, in which remains between its inner surface and the rotor- .. the annular gap cross-sectional constrictions are provided, which gradually converge and with abrupt cross-sectional enlargements alternate, characterized in that the housing (15a, 16) with substantially parallel Aligned stock inlet and outlet (15b or 15c) as a rotary pump housing and the rotor (14) is designed as a conveyor disc, and that to form the cross-sectional constrictions in the conveyor gap in the direction of rotation Wedge-shaped tapering inserts, possibly roughened on the gap side, are attached to the inner surface of the housing (15) are that between their thicker end and the circumference of the conveyor disk (lA) a clear, in the radial direction Leave the measured narrowest conveyor gap width (x) of at least ten millimeters. 2. Apparatus according to claim 1, characterized in that the drive ^{speed of the conveyor disc Cl 2} *) an increase in the conveying speed of about 1 m / sec at the head inlet (15b) aif about 100 to 120 m / sec at the narrowest points (x) of the Funding gap is coordinated. -9 - 0098U / 0836 ß. »4. 82Oe June 26, 1969 3. Apparatus according to claim * 1 and 2, characterized in that the sequence of each other. alternating cross-sectional constrictions to widening of the conveyor gap at a given circumferential speed of the conveyor ^{disk (I 1} J) is set to an alternating frequency of about 2 to 6 kHz. ¹ J. Apparatus according to claim 1, characterized in that the conveyor disk (I ¹ J) is designed around the entire circumference for accelerating the material Has shaping. for example with a row of teeth (I ¹ Jb). 0098U / 0836 Blank page