DE1951204A1 - Device for stretching, drying and heat setting of sieves and cloths made of plastic for paper machines - Google Patents

Description

DR. RUDOLF BAUER DIPL.-ING. HELMUT HUBBUCH

PATENT LAWYERS

753 PFORZHEIM.

WESTLICHE 31 (AM LEOPOLDPtATZ)

TEL .: (07231) 24290

October 8, 1969 I / K

Aktieselskabet Humes Mekaniske Vaerksted, Oslo (Norway)

"Device for stretching, drying and heat setting plastic sieves and giggles for paper machines"

The invention relates to a device for stretching, Drying and heat setting of sieves and cloths made of plastic for paper machines.

Such a device is known to consist of two in the Loop of the endless screen or cloth lying rollers, of one of which can be moved parallel to itself to stretch the sieve or cloth, while the other drives the sieve and for heat setting and drying through a hot air duct pulls. The rollers are often 10 m long and up to 7 tons in weight. Rollers with these dimensions can therefore not be used, as is the case with the rolls of smaller paper machines is sometimes possible, to change the screen by counter pressure on the end of an extended

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Bearing pin, so-called Gantileverzapfens, are exposed on one side. Rather, the rollers in the middle were supported - ^: supported. As long as the supports were needed, the sieve or cloth to be removed and the sieve or cloth to be slipped on had to be folded lengthways several times so that there was space between the support and the bearing, a stress that reduced the service life of the sieve.

This disadvantage is now with the device of the invention avoided by a cantilever protruding into the loop from one side, which supports the roll journals on the opposite side and thereby the removal of the journal bearings and the exposure of the roller ends is permitted. The sieve can then be exchanged over the now free ends of the roller. The cantilever supports are useful to form a structural unit connected so that the journals of both rollers at the same time can be supported or placed in the journal bearings,

The supports are best placed by spring force against the "pegs" printed and deducted from the cones by overcoming them. The supports can also be moved hydraulically Trunnion bearings are best used as sleds or carts on Üehie- - nen movable.

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The drying chamber is best in two parts. The lower part is

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connected to the gantilever device, while the upper part can be moved on rails.

The drawing shows, for example, schematically and partially in section a preferred embodiment of the device of the invention, namely:

Pig. 1 the horizontal projection of the device,

FIG. 2 shows a vertical projection of the device according to FIG. 1 and

Fig. 3 is a side view of the device.

On rails 1 and 2 are the bearings 6, 7 "and 8 for the Journal of the rollers 3 "and 4 as sliding blocks, sledges or trolleys movable. The bearings 7 and 8 contain slide rails 9, in which a bearing block 10 is displaceable by the clamping screws 11 and. This device is used to stretch the sieve loop 23 stretched out between rollers 3 and 4. The bearings 7 and 8 can be fitted with motors 13 and 14 on the rails 1 and 2 can be shifted over a wide range. The end positions of the roller 4 in this area are indicated by dashed lines Lines denoted as 4 'and 4 "(Fig. 2). The rails 1 and 4 have rows of holes 29 through which the bearings 7 and 8 on each Position of the area can be specified.

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The drive roller 3 is rotated by the motor 15.

The drying tunnel is in two parts. The lower part 17 lies in the sieve loop 23 _? the upper part 16 can be moved over it. For this purpose it has legs 18 and 19 which run on rails 20, 21 with wheels. The duct is connected to a hot air generator 22. The air flow is indicated by arrows. Two strong cantilevers 24 and 25 (FIG. 3) are embedded in the floor. They carry the rails 1 and 2 and the lower part 17 of the drying tunnel. In their free baths they are connected by a plate 26. The plate 26 has two support arms and 28 which extend beyond the cantilever arrangement on each side. The support arms 27 and 28 are pressed down by means not shown against spring force during the operation of the device. If these means do not work, the springs relieve the bearings 6 and 8 at the same time from the weight of the journals of the rollers 3 and 4, provided that the roller 4 is brought into the position 4 '. The bearings 6 and 8 can then be withdrawn from the journals and the ends of the rollers 3 and. 4 are free to change the screen. The device works as follows.

To change the screen, the upper part 16 of the drying tunnel is first removed. Then the bearings 7 and 8 are through the Motors 13 and 14- moved into position 4 'of roller 4. the Support arms 27 and 28 are relieved and press the springs the arms against one of the journals of the rollers 3 and 4. The

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Now relieved bearings 6 ″ and 8 are on rails 1 and 2 pushed off the pins to the right and left and the ends of the rollers 3 and 4 are exposed. The sieve or CPuch will replaced, the bearings 6 and 8 are pushed back to the pin and the arms 27 and 28 against the spring action of the Pin pressed off. The motors 13 "and 14- move the bearings 7 and 8 to the right up to the stretched position of the mesh loop 23. The bearings 7 and 8 are then in one of the holes in the row of holes 29, the drying tunnel upper part 16 is moved over the wire loop 23, the hot air is connected and the sieve is stretched by actuating the tensioning screws 11 and 12.

009831/0916

Claims (6)

DR. RUDOLF BAUER · .. DIPLHNG. HELMUT HUBBUCH 753 PFORZHEIM. A. VVESTUCHE 3f tAM LEO PO LD P LATZ) ▼ TEL .:(O723I)2429O October 8, 1969 Patent claims: IiΛ device for hedging, drying and heat setting of Sieves and cloths of plastic for paper machines of at least two rollers lying in the loop of the endless screen or cloth, one of which is for the rear end of the screen or cloth parallel to itself is sliding while the other drives the sieve and for heat fixation and drying »marked through a hot air duct one from one side into the loop (23) of the sieve or Tuches protruding cantilever (24-, 25), from which arms (27, 28) support the roll neck on the opposite side and thereby the withdrawal of the journal bearings (6, 8) and the exposure of the rollers (3, 4) ends. 2. Apparatus according to claim 1, characterized in that that the cantilever support arms (27, 28) for both rollers (3, 4) are connected to a construction unit, which the simultaneous support of the journals of both rollers (3, 4-) allowed » 3. Apparatus according to claim 1 or 2, characterized in that the cantilever arms (27, 28) by spring force pressed against the roll neck and pulled off them by overcoming them by a counterforce. 4 ·. Device according to one of the preceding claims, characterized in that the journal bearings (6, 7, 8) can be moved as slides or carriages on rails (1,2). 5. Device according to one of the preceding claims, characterized in that the journal bearings (7, 8) for the tension roller (4-) can be moved by a motor (15 * 1 ² O over the rails (1,2) and can be locked on the rails (29). 6. Apparatus according to claim 5 * characterized in that that the pins of the tension roller (4) in bearing blocks (10) run, which can be moved by clamping screws (11, 12) in slide rails (9) on the journal bearings (7 ₉ 8). 7- device according to one of the preceding claims, characterized in that the 35cockenkanal is in two parts 009831/0816 ' - 8 - ■■■■ '. ■. (16,17) is -and the lower part (17) in the cantilever construction is attached, while the upper part (16) on legs (18, 19) Rails (20, 21) can be moved. 00983 1/09 16