AU706688B2

AU706688B2 - Device for the continuous-flow treatment of textile material or similar

Info

Publication number: AU706688B2
Application number: AU59442/96A
Authority: AU
Inventors: Gerold Fleissner
Original assignee: Fleissner GmbH
Current assignee: Truetzschler Nonwovens GmbH
Priority date: 1995-07-14
Filing date: 1996-07-10
Publication date: 1999-06-24
Anticipated expiration: 2016-07-10
Also published as: AU5944296A; BR9603073A; EP0753619A3; EP0753619B1; EP0753619A2; JP3939385B2; JPH0931827A

Description

i I liB The invention relates to the continuous-flow treatment of textile material, fleeces or paper with a gaseous or liquid treatment medium circulated in the device with a permeable sheet-metal drum as transport element, said drum being under suction and having bases on the ends, and at its perimeter being covered with a screen-type layer, and between the screen-type layer and the drum body as a girder to increase the distance between the drum body and this layer there are disposed parallel over the whole length of the drum from base to base straight sheet-metal strips, the sheet-metal drum 15 fitting directly on to the radially inwardly-situated edges of the metal strips, and these metal strips being closely connected with the outer perimeter of the sheet-metal drum body. This is the subject-matter of the main application P 44 22 508.3.

The particular advantage of this screen drum construction in which the girder known from DE 38 738 Al, in a drum sheet-metal casing construction, is replaced by upright sheet-metal strips which extend parallel over the whole length of the drum unbent from one end of the drum to the other, is an inexpensive drum construction with extremely high air permeability in the region of the textile material lying on it, although the sheet-metal casing which is not so permeable and is in itself an obstacle, remains unchanged. These metal strips serve only to increase the distance of the screen cloth from the sheet-metal casing and increase the distance between the screen drum body and the screen cloth in such a way, that the lesser air permeability of the perforated drum is not a significant factor. In this construction the increase in the screen drum body's resistance to denting is also important.

a.

Sheet-metal strips extending in a two-dimensional plane can only be attached to the screen drum by welding. But not only does the welding process result in structural changes in the metal, but the welding seams can also in *999 the long run tear under extreme thermal stress, for instance through constant temperature changes on the •0 screen drum as when cold and wet material come in as 0 opposed to the dry and hot material which has just left. Expensive repairs are then necessary.

The purpose underlying this invention is further developing a screen drum with a basic construction according to the main application, in such a way that the air permeability remains constant over the whole surface of the material and yet the problems mentioned no longer exist.

This purpose is fulfilled according to the invention by providing the radially inwardly-situated edges of the i I metal sheets with a flange and it is now this flange that is tightly connected to the drum body. In this way it is possible to attach the sheet-metal strips to the drum body with rivets or bolts.

It is particularly advantageous if at the free end of the flange a further sheet-metal strip is attached at right angles to a double sheet-metal strip bent in a Ushape. The flange or the base of this double sheet- 10 metal strip should be perforated in the same way as the screen drum body, so that not only can the holes of the perforation be used for fastening but also so that the air permeability of the drum is not, or only slightly, reduced by the area of the flange or the base of the Ushaped double sheet-metal strip. Since, however, some or other of the holes in the perforation are closed by the nuts or bolts used in fastening, the invention provides, as a more advantageous arrangement, for the metal strips projecting radially upright also to be 20 perforated. In this way the air permeability of the areas with the perforation holes that are closed by bolts is adjusted to that of the areas lying between the fastening flanges.

The drawing shows an embodiment, given by way of example, of the device according to the invention.

Depicted are: Fig. 1 a longitudinal section of a normal screen drum device, the casing of which consists here of a perforated metal drum with sheetmetal strips standing vertically on it and in addition the screen cloth radially outside, Fig. 2 an enlarged diagram of a detail of the sheetmetal casing of this screen drum device in a section vertical to that of Fig. 1.

Fig. 3 an enlarged diagram of another detail of the metal casing of this screen drum device and Fig. 4 an enlarged diagram of a further detail of the metal casing of this screen drum device.

A screen drum device consists basically of a substantially rectangular casing which is divided by a partition wall into a treatment area and a blower area In the treatment area the screen drum is mounted pivotally and a blower is mounted concentrically to it in the blower area The blower area can of course be disposed in a special blower casing, separate from the screen drum casing (1) and not shown here. In any case the blower places the inside of the drum under suction. The drum construction in a wet treatment device, which can also serve just to draw off fluid is also the subject-matter of the patent. The total construction has then to be adapted accordingly.

According to Fig. 1, above and below the blower are disposed heating units which consist of pipes through which heating medium flows. In the area which is not covered by the textile material the screen drum is shielded internally from the suction by an inner cover The effective casing of the screen drum is formed 10 by the perforated metal sheet described below together with a structure of 3heet-metal strips according to oSe Fig. 2 4. This is surrounded externally by a finemeshed screen which on the end face of the drum is held taut on to the two bases (11, 12) by means of rings.

i:o The sheet-metal strip structure consists of axially extended metal strips, the radially aligned height of which is clear from Fig. 2 4. Thus the screen-type S 20 covering is only lying on the radially externallysituated edges of the metal strips. The metal strips lie with their radially inwardly-situated edge directly on the screen drum body and are disposed at a defined distance beside one another on the screen drum body So that this distance and the exact alignment of the metal strips (10) is fixed over the working width of the drum, the radially inwardly-situated edges of the I I metal strips (10) are, contrary to the disclosure of the main application, provided with a flange (14) which projects at a right angle from the metal strip and is bolted on to the screen drum body through its perforation or connected with a rivet The head (17) of the bolt can lie on the inner side of the drum or, better, be inserted by attachment to the mounting hole as shown in 17'. In any case the nut (18) of the bolt is disposed on the outside of the 10 flange (14) or of the drum body The flange (14) is provided with perforation, like the screen drum body, the perforations align exactly.

It is advantageous if at the free end of the flange (14) an additional metal strip is attached at a right angle to a double sheet-metal strip bent in a U- Sshape (10, 14, This double sheet-metal strip 14, according to the example, then covers two rows of the perforation holes (19) of the drum body *tahaa 20 and a further two rows of perforation holes (19) then remain free. The holes used for fastening should be staggered, some in the one row, some in the other.

(Fig. 2).

So that the holes used for fastening and therefore closed to the passage of air do not have a disadvantageous effect on the uniform air permeability of the drum over its whole extent, the walls standing radially upright and therefore the sheet-metal strips (10,10') themselves are also provided with holes The width of the flange (14) or of the base of the double sheet-metal strip (10, 10') should be chosen so that the sheet-metal strip (10) or, on a double sheetmetal strip, both sides (10, 10') of the U-shaped cross section extend radially over an unperforated crosspiece (21) of the drum casing. Thus the material of 10 the sheet-metal strip (10, 10') does not impede the air permeability of the drum.

pp THE CLAIMS DEFINING THE INVENTION ARE AS FOLLOWS:- 1. Device for the continuous flow-treatment of textile material, fleeces or paper with a gaseous or liquid treatment medium circulated in the device with a permeable sheet-metal drum as transport element, said drum being under suction and having bases on the ends, and at its perimeter being covered with a screen-type layer, and between the screen-type layer and the drum body as a girder to increase the distance between the drum body and this layer there are disposed parallel over the whole length of the drum from base to base straight sheet-metal strips, the sheet-metal drum fitting directly on to radially inwardly-situated edges of the metal strips, and these metal strips being closely connected with the outer perimeter of the sheet-metal drum body, characterised in that the radially inwardly-situated edges of the sheet-metal strips are provided with a flange that is tightly connected to the drum body.

2. Device according to claim 1, characterised in that the flange projects at a right-angle from the metal strip.

3. Device according to claim 2, characterised in that at the free end of the flange a further sheet-metal strip is attached at a right-angle to form a double sheet-metal strip bent into a U-shape.

20 4. Device according to any one of claims 1 to 3, characterised in that the drum is perforated.

5. Device according to claim 4, characterised in that the flange or the base of the double sheet-metal strip is bolted together with the perforated drum.

25 6. Device according to claim 4, characterised in that the flange or the base of the double sheet-metal strip is riveted on to the perforated drum.

7. Device according to either claim 5 or 6, characterised in that the usual perforation provided for the air permeability of the drum is used for the a attachment of the flange or of the base of the double sheet-metal strip to the 30 drum body.

8. Device according to either claim 5, or claim 7 in combination with claim 5, characterised in that the bolt has a bolt head, wherein the bolt is oriented radially with respect to the drum body and the bolt head lies inside the drum body.

35 9. Device according to either claim 7 or 8, characterised in that the head of the bolt or the rivet is sunk in the respective hole of the drum body.

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Claims

11. Device according to any one of claims 1 to 10, characterised in that the sheet-metal strips have radially-upright walls of sheet-metal which are perforated.

12. Device according to any one of claims 1 to 11 in combination with claim 4, characterised in that the sheet-metal strip or, in a double sheet-metal strip, both sides of the U-shaped cross-section, extend radially over a cross- piece of the drum body that is not perforated.

13. Device for the continuous flow-treatment of textile material, fleeces or paper with a gaseous or liquid treatment medium circulated in the device with a permeable sheet-metal drum as transport element substantially hereinbefore described with reference to Figures 2 to 4 of the accompanying drawings. Dated this Nineteenth day of April 1999 SFLEISSNER GMBH CO. KG MASCHINENFABRIK Patent Attorneys for the Applicant: F B RICE CO A A bs t racat The permeable drum for the wet or dry treatment of textile material, paper or other permeable materials of a certain width comprises a normal perforated sheet- metal drum, on which, along the length of the drum, projecting sheet-metal strips are attached at a distance from one another. The attachment is achieved by means of bolts or rivets, which are inserted into a flange of the metal strip which is perforated like the perforation of the drum and extends vertically to the sheet-metal strips. The sheet-metal strips increase p. the drum's resistance to denting and improve the uniform ventilation of the material lying externally on the edges of the sheet-metal strips on the screen-type *4ppplayer.