US20070292547A1 - Former Head With Rotary Drum - Google Patents
Former Head With Rotary Drum Download PDFInfo
- Publication number
- US20070292547A1 US20070292547A1 US11/659,385 US65938505A US2007292547A1 US 20070292547 A1 US20070292547 A1 US 20070292547A1 US 65938505 A US65938505 A US 65938505A US 2007292547 A1 US2007292547 A1 US 2007292547A1
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- United States
- Prior art keywords
- drum
- bearing
- segments
- former head
- ring
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
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- 239000000835 fiber Substances 0.000 claims description 7
- 239000000463 material Substances 0.000 claims description 4
- 238000002347 injection Methods 0.000 claims description 3
- 239000007924 injection Substances 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 description 5
- 239000000203 mixture Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 229920003043 Cellulose fiber Polymers 0.000 description 1
- 206010053567 Coagulopathies Diseases 0.000 description 1
- 230000035602 clotting Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 230000003993 interaction Effects 0.000 description 1
- 239000000725 suspension Substances 0.000 description 1
Images
Classifications
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/736—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged characterised by the apparatus for arranging fibres
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
-
- D—TEXTILES; PAPER
- D04—BRAIDING; LACE-MAKING; KNITTING; TRIMMINGS; NON-WOVEN FABRICS
- D04H—MAKING TEXTILE FABRICS, e.g. FROM FIBRES OR FILAMENTARY MATERIAL; FABRICS MADE BY SUCH PROCESSES OR APPARATUS, e.g. FELTS, NON-WOVEN FABRICS; COTTON-WOOL; WADDING ; NON-WOVEN FABRICS FROM STAPLE FIBRES, FILAMENTS OR YARNS, BONDED WITH AT LEAST ONE WEB-LIKE MATERIAL DURING THEIR CONSOLIDATION
- D04H1/00—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres
- D04H1/70—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres
- D04H1/72—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged
- D04H1/732—Non-woven fabrics formed wholly or mainly of staple fibres or like relatively short fibres characterised by the method of forming fleeces or layers, e.g. reorientation of fibres the fibres being randomly arranged by fluid current, e.g. air-lay
Definitions
- the present invention concerns a former head of the kind that includes at least one rotary drum, which at each end is mounted in a bearing gable in which a needle roller is mounted, and which is used for dry forming of fibrous web, where a fibre material mixed with air may be fed by injection into the rotary drum.
- former head where a mixture of fibres and air is injected into the ends of rotating perforated drums. Inside the drums, a needle roller is mounted which is also rotatable, and which keeps the individual fibres floating so that no clotting occurs.
- the former head is disposed over an endless running former wire opposite a vacuum box so that the fibres, under the action of the vacuum, are sucked through the perforation in the drum and fixed on the underlying former wire.
- the known former heads usually there are two drums, where one is rotated in the direction of movement of the former wire and the other is counter-rotated in relation thereto. Alternatively, there may be another number of drums.
- the needle rollers which are provided with radially extending spikes, are usually rotated against the direction of rotation of the respective drums.
- drums have been suspended in bearing gables in a frame supporting the former head, and usually also the vacuum box and the former wire.
- the needle rollers have been supported in bearing brackets disposed beyond the ends of the drums.
- the former heads have a width of about four meters.
- the needle rollers are to rotate with a speed up to 1200-1400 rpm in order to attain desired capacity.
- the drums are normally rotated with a speed of about 200 rpm.
- the perforations in the drum have a design which has been determined from the fibres, used for the manufacturing of the fibrous web or tissue. There is a need for changing the drums so that perforations with suitable shape are used when making fibrous webs or tissues of different types of fibres and/or fibre mixtures. For example, for making paper products or napkin products, cellulose fibres are primarily used which may be mixed with longer binding fibres.
- the drum is composed of at least two partly cylindric, readily separatable segments which are mounted on a bearing ring at each of their ends, the bearing ring projecting from the bearing gable and into the drum, that the drum segments are held together on the bearing ring by a corresponding segmented clamping ring, and that the needle roller is mounted on a bearing bracket in the bearing gable.
- drum Since the drum is made of segments, it is possible to let the needle roller remain on its bearing brackets when replacing the drum. It is only required to open the clamping ring and release the drum segments. These drum segments may be lifted up freely in the interspace between the bearing gables. This or those additional drum segment(s), which is/are not lifted free and which is/are disposed on a downwards facing side of the bearing ring, is/are turned upwards, whereafter they are also lifted free from the bearing ring. After removing the drum segments, it will be possible to place new drum segments, as these are lifted in place on the bearing ring between the two bearing gables. When the drum segments are placed on the bearing ring, the clamping ring is mounted again, whereafter the former head is ready for operation.
- the clamping ring will typically be made of a number of segments corresponding to the number of drum segments, and these segments will typically be provided with clamping surfaces or flanges, needing 1-2 screws for clamping the clamping ring segments together.
- clamping surfaces or flanges needing 1-2 screws for clamping the clamping ring segments together.
- the former head is peculiar in that clamping ring segments, drum segments and bearing rings have means for releasable securing of the clamping ring segments and the drum segments to the bearing rings.
- Such means may preferably be provided in the form of screws passing through holes in the clamping ring segments and drum segments and which are screwed into the bearing rings.
- all clamping ring segments may be separated from each other without any risk of the downwards facing drum segments and clamping ring segments falling down. During dismounting and mounting thus there will be no risk of damaging the drum segments during mounting and dismounting.
- the former head according to the invention is peculiar in that the bearing ring has an outer diameter corresponding to the inner diameter of the drum, that a projecting back is provided on the outer side of the bearing ring, and that the end parts of the drum segments are profiled for forming a groove for accommodating the back of the bearing ring.
- the interaction between the projecting back and the groove with simultaneously serve as secure and correct positioning of the drum segment during mounting.
- clamping ring segments are made with an internal groove which is adapted for accommodating the profiled end parts of the drum segments, a further advantage is obtained by a secure clamping with the end parts of the drum securely clamped between the bearing ring disposed inside the drum and the clamping ring disposed externally on the drum. It is preferred to use a number of clamping ring segments corresponding to the number of drum segments. However, it will also be possible to use different numbers of clamping ring segments and drum segments.
- further segmented clamping rings may be disposed at one or more intermediate positions between the ends of the drum. It is noted that such further clamping rings will be disposed at mutually displaced positions over the length of the drum on succeeding drums. Hereby is enabled a uniform laying of fibres, even if such additional clamping rings are used.
- the need for additional clamping rings will depend on the width of the former head/length of the drum and the dimensions of the drum segments.
- the bearing brackets of the needle rollers are supporting the needle rollers spaced apart from the ends thereof.
- part of the needle rollers may be situated in the bearing gable or outside these bearing gables in the connecting pipes that connect succeeding drums with each other for achieving a circulating flow of fibres through the drums.
- drums made of drum segments it is possible to assemble a drum from segments having different perforations in order thereby to adapt the properties of the product. Thus variation in hole shape and hole size may be performed. However, it will also be possible to compose a drum of drum segments having the same perforations.
- FIG. 1 shows a side view of a former head according to the invention
- FIG. 2 an exploded perspective view of drums and needle rollers for a former head according to the invention
- FIG. 3 an enlarged partial view illustrating a detail in FIG. 2 ;
- FIG. 4 a partial sectional view corresponding to FIG. 3 .
- FIG. 1 a former head 1 according to the invention.
- the former head 1 is disposed over an endless former wire 2 which is moved according to the arrow 3 , so that a fibrous web or tissue 4 is formed at the top side of the former wire 2 .
- a vacuum box 5 is provided below the former wire 2 , at a position opposite to the former head 1 .
- the former wire is passed around reversing rollers 7 .
- the formed fibrous web or tissue 4 is removed from the former wire by means of transfer unit that are known in the art.
- Fibre material mixed with air is supplied to the former head 1 via a pipe 8 for injection at the end of one of two drums 9 , 10 provided in the former head.
- the supply pipes 8 are connected to shredding devices in form of hammer mills or other equipment which shreds the fibre material so that individual fibres, or individual fibres containing very few agglomerates, are formed.
- the former head includes two rotating drums 9 , 10 , each containing a needle roller indicated by 11 , 12 .
- the fibres fed into the drum 8 is circulated through the two drums 9 , 10 , as these are connected with transfer pipes 13 at both sides, which are well-known in this type of former head.
- FIG. 2 shows a perspective view of certain parts from the former head 1 .
- the drums 9 , 10 are made of two semi-cylindric segments 9 A, 9 B, 10 A, 10 B.
- the drums 9 , 10 are mounted on bearing rings 14 (only one is visible) which is projecting from bearing gables 15 , 16 at each end of the drums 9 , 10 .
- the needle rollers 11 , 12 at each end is mounted on a bearing bracket 17 (only one is visible) which is disposed in or directly on the bearing gables 15 , 16 .
- the drum segments 9 A, 9 B, 10 A, 10 B are secured on the bearing rings 14 , using clamping ring segments 18 which are provided as semi-circular clamping ring segments as well.
- Each of the clamping ring segments have a hole 19 that may be aligned with a hole 20 in the associated drum segment for receiving a screw which is used for securing the drum segments and the clamping ring segments on the bearing ring 14 .
- FIG. 3 shows an enlarged view illustrating the joining of drum segment 9 B and clamping ring segments 18 on bearing ring 14 .
- bearing ring 14 has a projecting back 21 , and that the end part of the drum segment is profiled for forming a groove 22 for accommodating the back 21 . Furthermore, it is seen that the clamping ring segment 18 is profiled with a groove 23 which serves to accommodate the projecting back 21 , with the profiling 22 of the drum segment 9 B interposed between.
- the clamping ring segments are provided with holes 24 for the reception of screws for joining and clamping the clamping rings.
- FIG. 3 two holes 24 are shown on a clamping face, being threaded holes for receiving screws which are disposed in through-going holes (not shown) in the interacting clamping ring segment.
- countersunk screws are used, so that no projecting parts appear on the cylindric clamping ring.
- the formed clamping rings will clamp the drum around the bearing ring 14 for rotating together with it.
- the bearing ring 14 will be seated in the bearing gable 15 in order to be rotated with a desired speed.
- FIG. 2 shows that the needle rollers are provided with a groove 25 in which they rest upon the bearing bracket 17 .
- the bearing bracket 17 is mounted on the side plate of the bearing gable 16 . Also, there is provided a bearing bracket for the second end of the needle rollers and drive means for these, so that they are driven with a desired rotational speed in a known way.
- FIG. 4 shows a sectional view through the bearing ring at a position opposite the joint of the clamping ring segments and the drum segments, as illustrated in FIG. 3 . It appears that the bearing ring 14 is disposed in the bearing gable 15 where it is seated.
- drums can be made with other perforations than the shown circular openings. Any shape and size may thus be possible for the perforations of the drums.
- the bearing gables as an integrated part of a machine frame and/or as an integrated part of the vacuum box 5 . Furthermore, it is possible to make the bearing gables pressure-tight and to connect these with a pressure source via a pipe connection 26 so that maintaining an overpressure in the bearing gables is ensured.
Landscapes
- Engineering & Computer Science (AREA)
- Textile Engineering (AREA)
- Folding Of Thin Sheet-Like Materials, Special Discharging Devices, And Others (AREA)
- Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
- Nonwoven Fabrics (AREA)
- Registering, Tensioning, Guiding Webs, And Rollers Therefor (AREA)
- Replacement Of Web Rolls (AREA)
- Paper (AREA)
- Preliminary Treatment Of Fibers (AREA)
- Tyre Moulding (AREA)
Abstract
There is disclosed a former head (1) with rotating drums (9, 10), in which is mounted needle rollers (11, 12), and which is used in dry forming of fibrous web or tissue (4). The drums (9, 10) are composed of at least two semi-cylindrical segments (9A, 9B; 10A, 10B) readily separating in axial direction, and which are mounted on a bearing ring (14) protruding into the drums (9, 10). The drum segments are held together on the bearing ring (14) by means of a segmented clamping ring (18). By such design, it is possible to perform rapid mounting and dismounting of the drum without need for dismounting the needle rollers (11, 12).
Description
- The present invention concerns a former head of the kind that includes at least one rotary drum, which at each end is mounted in a bearing gable in which a needle roller is mounted, and which is used for dry forming of fibrous web, where a fibre material mixed with air may be fed by injection into the rotary drum.
- From the industry there are known former head where a mixture of fibres and air is injected into the ends of rotating perforated drums. Inside the drums, a needle roller is mounted which is also rotatable, and which keeps the individual fibres floating so that no clotting occurs. The former head is disposed over an endless running former wire opposite a vacuum box so that the fibres, under the action of the vacuum, are sucked through the perforation in the drum and fixed on the underlying former wire.
- In the known former heads, usually there are two drums, where one is rotated in the direction of movement of the former wire and the other is counter-rotated in relation thereto. Alternatively, there may be another number of drums. The needle rollers, which are provided with radially extending spikes, are usually rotated against the direction of rotation of the respective drums.
- Until now the drums have been suspended in bearing gables in a frame supporting the former head, and usually also the vacuum box and the former wire. The needle rollers have been supported in bearing brackets disposed beyond the ends of the drums.
- Typically, the former heads have a width of about four meters. In such former heads, it is normal that the needle rollers are to rotate with a speed up to 1200-1400 rpm in order to attain desired capacity. The drums are normally rotated with a speed of about 200 rpm. Thus demands are made on the suspension of both drums and needle rollers.
- If a former head is to have an operational width of about 4 m, the needle rollers cannot be rotated with the desired speed without risking occurrence of natural oscillations. This impairs the quality of the dry formed product.
- The perforations in the drum have a design which has been determined from the fibres, used for the manufacturing of the fibrous web or tissue. There is a need for changing the drums so that perforations with suitable shape are used when making fibrous webs or tissues of different types of fibres and/or fibre mixtures. For example, for making paper products or napkin products, cellulose fibres are primarily used which may be mixed with longer binding fibres.
- By changing former heads from one type of fibres/fibre mixture to a different kind, it is necessary to replace the drums. Until now, this replacement has been slow and space demanding. In order to replace a drum, it has been necessary to dismount the needle roller and to pull it out of the end of the drum. Thus there was need for free space beside the former head corresponding to the width of the former head, as the needle roller extends throughout the entire length of the drum, and thereby also the width of the former head. After taking out the needle roller, the drum may be dismounted from its bearing brackets and removed, whereafter a new drum is mounted. Then the needle roller can be re-mounted in the new drum. The period of time for such a replacement would be up to about 10 hours.
- It is the purpose of the present invention to indicate a former head which is designed in a way that enables simple replacement of the drums, and where no demands are made to substantial space beside the former head for performing the replacement, and where at the same time it is possible to reduce the risk of natural oscillations in the needle roller.
- According to the present invention, this is achieved with a former head of the kind mentioned in the introduction, which is peculiar in that the drum is composed of at least two partly cylindric, readily separatable segments which are mounted on a bearing ring at each of their ends, the bearing ring projecting from the bearing gable and into the drum, that the drum segments are held together on the bearing ring by a corresponding segmented clamping ring, and that the needle roller is mounted on a bearing bracket in the bearing gable.
- Since the drum is made of segments, it is possible to let the needle roller remain on its bearing brackets when replacing the drum. It is only required to open the clamping ring and release the drum segments. These drum segments may be lifted up freely in the interspace between the bearing gables. This or those additional drum segment(s), which is/are not lifted free and which is/are disposed on a downwards facing side of the bearing ring, is/are turned upwards, whereafter they are also lifted free from the bearing ring. After removing the drum segments, it will be possible to place new drum segments, as these are lifted in place on the bearing ring between the two bearing gables. When the drum segments are placed on the bearing ring, the clamping ring is mounted again, whereafter the former head is ready for operation.
- Where dealing with the prior art former heads replacement would take up to 10 hours, replacement of the drums may now be effected in about one or two hours. Furthermore, there will be no need for free space at the side of the drum, as there is no need of drawing the needle rollers out of the drums laterally before replacing the drum.
- In order to release the drum it is just required to loosen the clamping ring. The clamping ring will typically be made of a number of segments corresponding to the number of drum segments, and these segments will typically be provided with clamping surfaces or flanges, needing 1-2 screws for clamping the clamping ring segments together. Thus there will only be a need for loosening a few screws in order to release the clamping ring segments, and thereby the drum segments, from the bearing ring which extends a distance into each end of the drum.
- According to a particular embodiment, the former head is peculiar in that clamping ring segments, drum segments and bearing rings have means for releasable securing of the clamping ring segments and the drum segments to the bearing rings. Such means may preferably be provided in the form of screws passing through holes in the clamping ring segments and drum segments and which are screwed into the bearing rings.
- As the clamping ring segments and drum segments are secured on the bearing ring, all clamping ring segments may be separated from each other without any risk of the downwards facing drum segments and clamping ring segments falling down. During dismounting and mounting thus there will be no risk of damaging the drum segments during mounting and dismounting.
- According to a further embodiment, the former head according to the invention is peculiar in that the bearing ring has an outer diameter corresponding to the inner diameter of the drum, that a projecting back is provided on the outer side of the bearing ring, and that the end parts of the drum segments are profiled for forming a groove for accommodating the back of the bearing ring. Alternatively, it is possible to profile the end parts of the drum segments so that they have an inwards facing back, and to design to the bearing ring with a groove for accommodating such a profiling. By this embodiment, it will be possible to avoid the risk of an axial displacement of the drum in relation to the bearing ring. The interaction between the projecting back and the groove with simultaneously serve as secure and correct positioning of the drum segment during mounting.
- If the clamping ring segments are made with an internal groove which is adapted for accommodating the profiled end parts of the drum segments, a further advantage is obtained by a secure clamping with the end parts of the drum securely clamped between the bearing ring disposed inside the drum and the clamping ring disposed externally on the drum. It is preferred to use a number of clamping ring segments corresponding to the number of drum segments. However, it will also be possible to use different numbers of clamping ring segments and drum segments.
- If former heads with very great width are used, further segmented clamping rings may be disposed at one or more intermediate positions between the ends of the drum. It is noted that such further clamping rings will be disposed at mutually displaced positions over the length of the drum on succeeding drums. Hereby is enabled a uniform laying of fibres, even if such additional clamping rings are used. The need for additional clamping rings will depend on the width of the former head/length of the drum and the dimensions of the drum segments.
- By making the former head with the bearing brackets for the needle rollers disposed inside the bearing gables, it will be possible to obtain a shorter length of the free part of the needle roller.
- This is an advantage, as hereby it becomes possible to rotate the needle rollers with higher speed without risk of them being brought into natural oscillations that may influence the distribution quality of the fibres. Natural oscillations in needle rollers occur when the rotational speed of the needle roller becomes too high, or the length of the needle rollers becomes too great. A former solution to this problem has been to make the needle rollers and the drums with greater diameter, whereby it is possible to change the critical rotational speed for natural oscillations. However, this prior art solution is unnecessarily space demanding and expensive. By placing the bearing brackets of the needle rollers as close to each other as possible, it becomes possible to rotate the needle rollers with higher rotational speed and thereby attain a higher production capacity simultaneously with a better quality of the fibre distribution in a former head having a large effective operational width.
- It is possible that the bearing brackets of the needle rollers are supporting the needle rollers spaced apart from the ends thereof. Hereby, part of the needle rollers may be situated in the bearing gable or outside these bearing gables in the connecting pipes that connect succeeding drums with each other for achieving a circulating flow of fibres through the drums.
- By using drums made of drum segments, it is possible to assemble a drum from segments having different perforations in order thereby to adapt the properties of the product. Thus variation in hole shape and hole size may be performed. However, it will also be possible to compose a drum of drum segments having the same perforations.
- The invention will then be explained in more detail with reference to the accompanying drawing, where:
-
FIG. 1 shows a side view of a former head according to the invention, -
FIG. 2 an exploded perspective view of drums and needle rollers for a former head according to the invention; -
FIG. 3 an enlarged partial view illustrating a detail inFIG. 2 ; and -
FIG. 4 a partial sectional view corresponding toFIG. 3 . - In the various figures identical or corresponding elements will be designed with the same reference designation and will therefore not be explained in detail in connection with each figure.
- In
FIG. 1 is seen aformer head 1 according to the invention. Theformer head 1 is disposed over an endlessformer wire 2 which is moved according to thearrow 3, so that a fibrous web ortissue 4 is formed at the top side of theformer wire 2. Below theformer wire 2, at a position opposite to theformer head 1, avacuum box 5 is provided which viaconduit 6 is connected to a source of vacuum (not shown). The former wire is passed around reversingrollers 7. The formed fibrous web ortissue 4 is removed from the former wire by means of transfer unit that are known in the art. - Fibre material mixed with air is supplied to the
former head 1 via a pipe 8 for injection at the end of one of twodrums rotating drums drums transfer pipes 13 at both sides, which are well-known in this type of former head. -
FIG. 2 shows a perspective view of certain parts from theformer head 1. It appears that thedrums semi-cylindric segments drums gables drums needle rollers gables drum segments ring segments 18 which are provided as semi-circular clamping ring segments as well. Each of the clamping ring segments have ahole 19 that may be aligned with ahole 20 in the associated drum segment for receiving a screw which is used for securing the drum segments and the clamping ring segments on thebearing ring 14. -
FIG. 3 shows an enlarged view illustrating the joining ofdrum segment 9B and clampingring segments 18 on bearingring 14. - It appears that bearing
ring 14 has a projecting back 21, and that the end part of the drum segment is profiled for forming agroove 22 for accommodating the back 21. Furthermore, it is seen that the clampingring segment 18 is profiled with agroove 23 which serves to accommodate the projecting back 21, with theprofiling 22 of thedrum segment 9B interposed between. The clamping ring segments are provided withholes 24 for the reception of screws for joining and clamping the clamping rings. - In
FIG. 3 , twoholes 24 are shown on a clamping face, being threaded holes for receiving screws which are disposed in through-going holes (not shown) in the interacting clamping ring segment. With this embodiment, countersunk screws are used, so that no projecting parts appear on the cylindric clamping ring. Alternatively, it is possible to provide flanges with screw holes for clamping the clampingring segments 18 together. - It appears that the formed clamping rings will clamp the drum around the bearing
ring 14 for rotating together with it. In a way known per se, the bearingring 14 will be seated in the bearinggable 15 in order to be rotated with a desired speed. -
FIG. 2 shows that the needle rollers are provided with agroove 25 in which they rest upon the bearingbracket 17. The bearingbracket 17 is mounted on the side plate of the bearinggable 16. Also, there is provided a bearing bracket for the second end of the needle rollers and drive means for these, so that they are driven with a desired rotational speed in a known way. -
FIG. 4 shows a sectional view through the bearing ring at a position opposite the joint of the clamping ring segments and the drum segments, as illustrated inFIG. 3 . It appears that the bearingring 14 is disposed in the bearinggable 15 where it is seated. - The above Figures illustrate an embodiment of the invention, but other embodiments are possible, if only such embodiments apply the basic idea of the invention with segmenting of the
drums - Further clamping rings may thus be disposed at one or more positions along the length of the drums. Also, it is noted that the drums can be made with other perforations than the shown circular openings. Any shape and size may thus be possible for the perforations of the drums.
- Furthermore, it will be possible to make the bearing gables as an integrated part of a machine frame and/or as an integrated part of the
vacuum box 5. Furthermore, it is possible to make the bearing gables pressure-tight and to connect these with a pressure source via apipe connection 26 so that maintaining an overpressure in the bearing gables is ensured.
Claims (9)
1. A former head of the kind that includes at least one rotary drum, which at each end is mounted in a bearing gable in which a needle roller is mounted, and which is used for dry forming of fibrous web, where a fibre material mixed with air may be fed by injection into the rotary drum, characterised in that the drum is composed of at least two partly cylindric, readily separatable segments which are mounted on a bearing ring at each of their ends, the bearing ring projecting from the bearing gable and into the drum, that the drum segments are held together on the bearing ring by a corresponding segmented clamping ring, and that the needle roller is mounted on a bearing bracket in the bearing gable.
2. Former head according to claim 1 , characterised in that clamping ring segments, drum segments and bearing rings have means for releasable securing of the clamping ring segments and the drum segments to the bearing rings.
3. Former head according to claim 2 , characterised in that the means for releasable securing include a screw passing through holes in the clamping ring segments and the drum segments and which is screwed into the bearing ring.
4. Former head according to claim 1 , characterised in that the bearing ring has an outer diameter corresponding to the inner diameter of the drum, that a projecting back is provided on the outer side of the bearing ring, and that the end parts of the drum segments are profiled for forming a groove for accommodating the back of the bearing ring.
5. Former head according to claim 4 , characterised in that the clamping ring segments have an internal groove for accommodating the profiled end parts of the drum segments.
6. Former head according to claim 1 , characterised in that further clamping rings are disposed at one or more intermediate positions between the ends of the drum, and that such further clamping rings are mutually displaced on possible succeeding drums.
7. Former head according to claim 1 , characterised in that the bearing brackets for the needle roller are disposed inside the bearing gables.
8. Former head according to claim 8 , characterised in that the bearing brackets of the needle rollers are supporting the needle rollers spaced apart from the ends thereof.
9. Former head according to claim 1 , characterised in that the drum segments, which are assembled into forming a drum, have the same or varying perforations.
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DKPA200401185 | 2004-08-05 | ||
DK200401185A DK175987B1 (en) | 2004-08-05 | 2004-08-05 | Former head with rotating drum |
PCT/DK2005/000459 WO2006012898A1 (en) | 2004-08-05 | 2005-07-02 | Former head with rotary drum |
Publications (1)
Publication Number | Publication Date |
---|---|
US20070292547A1 true US20070292547A1 (en) | 2007-12-20 |
Family
ID=35229548
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
US11/659,385 Abandoned US20070292547A1 (en) | 2004-08-05 | 2005-07-02 | Former Head With Rotary Drum |
Country Status (9)
Country | Link |
---|---|
US (1) | US20070292547A1 (en) |
EP (1) | EP1799900A1 (en) |
JP (1) | JP2008508443A (en) |
CN (1) | CN101027441A (en) |
CA (1) | CA2575879A1 (en) |
DK (1) | DK175987B1 (en) |
MX (1) | MX2007001522A (en) |
NO (1) | NO20071178L (en) |
WO (1) | WO2006012898A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100283176A1 (en) * | 2008-01-11 | 2010-11-11 | Advance Nonwoven A/S | forming head for dry forming a fibrous web |
US8474737B2 (en) | 2010-09-24 | 2013-07-02 | Owens Corning Intellectual Capital, Llc | Rotary forming apparatus |
US12060665B2 (en) * | 2015-01-29 | 2024-08-13 | Lec, Inc. | Pulp fibrous accumulated sheet and method for producing pulp fibrous accumulated sheet |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2012095928A1 (en) | 2011-01-12 | 2012-07-19 | セイコーエプソン株式会社 | Paper recycling system and paper recycling process |
JP6354154B2 (en) * | 2013-12-25 | 2018-07-11 | セイコーエプソン株式会社 | Sheet manufacturing equipment |
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- 2005-07-02 JP JP2007524178A patent/JP2008508443A/en active Pending
- 2005-07-02 WO PCT/DK2005/000459 patent/WO2006012898A1/en active Application Filing
- 2005-07-02 CA CA002575879A patent/CA2575879A1/en not_active Abandoned
- 2005-07-02 CN CNA2005800323882A patent/CN101027441A/en active Pending
- 2005-07-02 US US11/659,385 patent/US20070292547A1/en not_active Abandoned
- 2005-07-02 EP EP05756476A patent/EP1799900A1/en not_active Withdrawn
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2007
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US2940418A (en) * | 1959-03-27 | 1960-06-14 | Black Clawson Co | Paper machinery |
US3145430A (en) * | 1960-12-14 | 1964-08-25 | Weyerhaeuser Co | Felter head and agitator |
US3914080A (en) * | 1970-07-02 | 1975-10-21 | Union Carbide Corp | Apparatus for the high speed production of non-woven fabrics |
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US5226991A (en) * | 1991-10-09 | 1993-07-13 | Mike Svaighert | Method of fabricating airlaid articles and apparatus for performing the method |
US5885516A (en) * | 1994-09-06 | 1999-03-23 | Scan-Web I/S | Method and a system for manufacturing broad airlaid paper webs containing an absorbing powder |
US5445777A (en) * | 1994-12-08 | 1995-08-29 | The Procter & Gamble Company | Air laying forming station with baffle member for producing nonwoven materials |
US6233787B1 (en) * | 1997-12-23 | 2001-05-22 | Marianne Etlar Eriksen | Fiber distributor |
US6203654B1 (en) * | 1998-02-20 | 2001-03-20 | The Procter & Gamble Company | Method of making a slitted or particulate absorbent material |
US6726461B2 (en) * | 1999-05-27 | 2004-04-27 | Bki Holding Corporation | Screen pipe for dry forming web material |
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US6330735B1 (en) * | 2001-02-16 | 2001-12-18 | Kimberly-Clark Worldwide, Inc. | Apparatus and process for forming a laid fibrous web with enhanced basis weight capability |
US6701637B2 (en) * | 2001-04-20 | 2004-03-09 | Kimberly-Clark Worldwide, Inc. | Systems for tissue dried with metal bands |
US7107652B2 (en) * | 2001-08-20 | 2006-09-19 | Dan-Web Holding A/S | High speed former head |
US20030116888A1 (en) * | 2001-12-20 | 2003-06-26 | Rymer Timothy James | Method and apparatus for making on-line stabilized absorbent materials |
US6709613B2 (en) * | 2001-12-21 | 2004-03-23 | Kimberly-Clark Worldwide, Inc. | Particulate addition method and apparatus |
US20030132556A1 (en) * | 2002-01-15 | 2003-07-17 | Kimberly-Clark Worldwide, Inc. | Process and apparatus for making a reinforced fibrous absorbent member |
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US7399377B2 (en) * | 2003-01-02 | 2008-07-15 | Weyerhaeuser Co. | Process for singulating cellulose fibers from a wet pulp sheet |
US7318797B2 (en) * | 2003-04-03 | 2008-01-15 | Hauni Maschinenbau Ag | Continuous rod machine arrangement for producing nonwoven filters |
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Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20100283176A1 (en) * | 2008-01-11 | 2010-11-11 | Advance Nonwoven A/S | forming head for dry forming a fibrous web |
US8474737B2 (en) | 2010-09-24 | 2013-07-02 | Owens Corning Intellectual Capital, Llc | Rotary forming apparatus |
US12060665B2 (en) * | 2015-01-29 | 2024-08-13 | Lec, Inc. | Pulp fibrous accumulated sheet and method for producing pulp fibrous accumulated sheet |
US12291805B2 (en) * | 2015-01-29 | 2025-05-06 | Lec, Inc. | Pulp fibrous accumulated sheet and method for producing pulp fibrous accumulated sheet |
Also Published As
Publication number | Publication date |
---|---|
NO20071178L (en) | 2007-03-29 |
MX2007001522A (en) | 2007-05-23 |
CN101027441A (en) | 2007-08-29 |
DK175987B1 (en) | 2005-10-31 |
WO2006012898A1 (en) | 2006-02-09 |
CA2575879A1 (en) | 2006-02-09 |
EP1799900A1 (en) | 2007-06-27 |
JP2008508443A (en) | 2008-03-21 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
AS | Assignment |
Owner name: DAN-CARE INT. A/S, DENMARK Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:CHRISTENSEN, KENN MOSGAARD;REEL/FRAME:019255/0699 Effective date: 20070429 |
|
STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |