FI90832C - Method and apparatus for removing fibers and other particles from the surface of mineral wool - Google Patents

Description

90832

A method and apparatus for removing fibers and other particles from the surface of mineral wool

The present invention relates to a method for removing fibers and other particles from the surface of mineral wool, the surface moving past the suction gap, the suction gap absorbing air from the surface of the mineral wool, the suction gap according to the air and the suction gap, and in which method the removal of fibers and particles is facilitated by subjecting the mineral wool surface to mechanical action under the action of the suction gap in the area covered by the suction gap. The invention also relates to a device for carrying out a method for removing fibers and other particles from the surface of mineral wool, which surface moves past the suction gap, which suction slot absorbs air next to the surface of the mineral wool so that loose fibers and other particles are drawn into the air to provide mechanical pushing of the mineral wool surface or surfaces simultaneously and in substantially the same location as the mineral wool surface is subjected to the suction effect.

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In connection with the processing of mineral wool products, larger or smaller amounts of pdly are produced. This poly contains e.g. fibers. There is a general effort in the industry to reduce the exposure of personnel to poles, especially fibrous pdly. It is an object of the present invention to solve this problem.

The invention is based on research into poly-inducing mechanisms as well as mechanisms used to prevent polyamination.

Research has shown that it is dominated by thin, short, non-moving fibers, which are formed during the processing of mineral wool. Studies have shown that the resulting airborne fibers and other particles are derived from mineral wool products.

2

Three mechanisms can be distinguished, each of which, individually or in combination with each other, can hold the fiber in the mineral wool product and prevent the fibers from spreading into the air. These three mechanisms are: 5 - tying - fastening - mechanical locking.

Binding is accomplished with a binder. The binder, in turn, consists of 10 hard plastics, which are dispersed in small droplets in mineral wool products. The fiber cannot be released into the air to the extent that the binder droplets are able to block it. Attachment is a slightly stronger bond. The attachment, in turn, can be accomplished with a polynomial oil that covers large portions of the fiber-15 surfaces in a thin layer. Two fibers in contact with each other, at least one of which has a thin oil film on its surface, adhere to each other, and this attachment is generally sufficient to prevent the fibers from spreading into the air.

20 However, studies have also shown that another type of fastening, namely electrostatic fastening, is important. The manufacturing process of mineral wool products includes the so-called a curing step in which the product and its binder are heated to about 200eC. In this process, the binder is permanently attached. However, during the curing process, complete drying also takes place, and since the curing process involves a strong gas flow through the product, the fibers can be electrostatically charged. In the event of subsequent cutting, bending, etc., this static charge is maintained, and the fibers thus charged tend to remain in the product. 30 However, during storage and transport, an electrical charge is discharged, and after this discharge, the electrostatically bonded fibers may initially be released for air support.

A third mechanism for holding the fibers in the mineral wool pulp is me-35 mechanical locking. A sufficiently long fiber remains in contact with numerous other fibers, which is why it remains in the pulp due to the effect of friction alone and is not released to be supported by air.

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Studies have also shown that certain fibers are so poorly bound or completely unbound in the product that they can be easily sucked out of the product by passing the product past the suction nozzle or suction gap efficiently enough. The other fibers and particles are so tightly bound that they can hardly detach from the product at all under normal circumstances. Between these two groups of fibers and particles are those fibers and particles which, at least not easily absorbed from the product, but which, above all after the loss of electrostatic forces, can be dissipated without the support of the product during handling and installation.

It is now an object of the present invention to improve the possibilities of absorbing also particles and fibers which may be supported by air in later processing steps but which do not leave the product easily by means of the suction slots adjacent to the mineral wool surface.

The method according to the invention is mainly characterized in that the mechanical pushing of the surface of the mineral wool takes place by subjecting the surface or surfaces of the mineral wool web 20 to a forced repetitive movement perpendicular to the surface during suction.

The device according to the invention for carrying out the method is mainly characterized in that the mechanical working member consists of 25 members for forcing the surface or surfaces of the mineral wool track into a forced repetitive movement perpendicular to the surface.

A particular feature of the invention is that the mechanical pushing of the mineral wool surface in the area of the suction gap takes place in such a way that the perforated plate is allowed to strike several times against the mineral wool surface.

The lifting preferably takes place on a perforated abutment plate on both sides and at a relatively fast pace, e.g. so that each point of the mineral wool track is reached at least three times during the movement past the suction gap provided with the abutment plate.

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It is possible to perform tybståm before the suction gap. In this case, however, there is a certain risk that the fibers thus detached will reattach 4 or remain in the mineral wool in other ways. For this reason, it is very advantageous if the pushing takes place in connection with the effect of the suction gap, for example in such a way that the pushing takes place inside the suction gap.

5

The work thus takes place as a mechanical work, such as a whip, which is crucial for poorly bound fibers and other particles. The perforated abutment plate is allowed to be soldered against the surface of the mineral wool. However, this must be done in such a way that the surface of the mineral wool undergoes a certain deformation when the plate is pounded so that the surface is actually moved and so that It is also possible to arrange several shocks in discs or in series so that the surface remains carefully treated. Mechanical lifting can also take place by placing a vibrator against the surface. It is easy to see that the invention is most easily applied to flat surfaces, i.e. above and below the mineral wool track. It is most advantageous to work on both sides.

20 One method that has proven effective in certain cases is to carry out the work with a rotating cylindrical brush which treats the mineral wool surface inside the suction gap. However, the brush must move against the direction of movement of the mineral wool track. As some of the fibers may adhere to the brush, it must be cleaned continuously or at short intervals. This can take place by allowing it to strike an edge and / or pass through a special, efficient suction gap.

Despite the efficiency of pushing and removal, there are always fibers and particles left in the product, which barely avoid removal and removal. In this case, there is always a risk that these will be split in half and then released to support the air during post-processing of the product. This can be effectively prevented by treating the machined surface with a polynomial agent.

The invention will now be described in more detail with the aid of a figure, which shows a longitudinal cross-section of a device according to the invention for removing polyå from a mineral wool web.

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Figure esitetåån mineral wool web 1 which moves in the direction of arrow 2, the mouth of the rollers 3 supported. The mineral wool layer 1 ylåpuolen 4 is jårjestetty adjacent the suction slot 5, which roller 7 pitåå mååråtysså position of mineral wool web ylåpuoleen 4 nåhden. The suction gap 5 is connected to the suction-5 line 6, which causes the air flow 13 to be drawn through the gap 5. with a push rod 26 of the stop plate 25 is jårjestetty opening 27 the mineral wool layer ylåpuolen 4 and the lip 28 of the suction slot pitkånomaisen election. Tyontotanko 26 moves up and down as indicated by arrow 29, and it further kåyttåå device which is not shown. This device 10 can be an eccentric or a pneumatically controlled impulse sensor. With this device, the plate 25 is made to be struck against the upper part 4 of the mineral wool track at a relatively fast pace, for example by so that each point of the mineral wool track is soldered at least three times. In this connection, the detached and air-suspended poly is recovered by means of an air flow 13 and led to a suction line 6.

The abutment plate 25 is suitably perforated so that the particles can be released from the surface of the mineral wool even during the melting itself.

20 adjacent the mineral wool web 14 corresponding to the underside of the device, indicated by reference numerals 5 '29' is jårjestetty corresponding viitenu-numerals 5-29.

It is also possible to form the device in such a way that the combination of the suction gap 5,5 'and the mechanically pushing abutment plate 25,25' comprises a mechanically pushing, rotating brush arranged inside the suction gap.

As the brush rotates against the direction of movement of the mineral wool web, it brushes loose fibers and particles from the mineral wool web 1. These loose fibers and particles are drawn into the suction line 6 by means of air currents 30. As the brush removes loose fibers and particles from the mineral wool web 1, some of the fibers and particles adhere to the brush, which is why it must be cleaned continuously or at short intervals. Such cleaning of the brush is accomplished so that the brush can strike the edge or the like.

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Claims (10)

A method of removing fibers and other particles from a mineral wool surface passing a suction gap (5.5 ') which sucks air next to the mineral wool surface (4.14), so as to release fibers and other particles with the air and into the the suction gap (5.5 ') and the removal of fibers and particles is neglected by subjecting the mineral wool surface (4.14) to a mechanical processing in connection with the action of the suction gap (5.5') within the area covered by the suction gap (5, 5 '), may be -10 characterized in that the mechanical processing of the mineral wool surface is effected by expelling a forced repetitive motion perpendicular to the surface of the mineral wool web (4.14) in conjunction with suction. 2. A method according to claim 1, characterized in that the forced repeated rudder is achieved by subjecting the mineral wool web (1) to vibration. 3. A method according to claim 1, characterized in that the forced repeated rudder is achieved by means of a pierced impact plate (25,25 ') being repeatedly struck against the mineral wool surface (4.14). 4. Method claim 3, characterized in that the processing with the pierced stop plate is carried out in two ways (25 and 25 25 ', respectively). 5. A method according to claim 3 or 4, characterized in that the impact plate (25,25 ') is contacted with the surface of the mineral wool web (4.14) at a relatively rapid rate, e.g. so that each point on the mineral wool web is at least three times during the movement past the suction gap (5.5 ') and the impact plate (25.25'). Apparatus for carrying out the method according to any one of the preceding claims for removing fibers and other particles from a mineral wool surface moving past a suction gap (5.5 '; 15.15') which sucks air next to the mineral wool surface (4, 14), so as to release fibers and other particles with the air and into the suction gap (5.5 '; 15.15'), and which arrangement! 90832 contains means (25,25 ') for effecting a mechanical machining of the mineral wool surface (s) (4,14) simultaneously and in substantially the same steel when the mineral wool surface is subjected to suction, characterized in that the mechanical processing means consist of a means for exposing the surface or surfaces (4.14) of the mineral wool web (1) to an enforced repeated movement perpendicular to the surface. 7. Device according to claim 6, characterized in that the forced repeated rudder travel is achieved by means of a stop plate (25,25 '), which is mounted in a range within the area of action of the suction gap (5.5'), and is arranged with relative pressure. rapid bumps hit the surface of the mineral wool web (4.14), e.g. so that each point on the mineral wool surface (4.14) is hit at least three times while the web moves past the suction gap (5.5 ') with the impact plate (25.25'). 8. Device according to claim 7, characterized in that the impact plate (25,25 ') is permeable to air, dust and particles. Device according to claim 7 or 8, characterized in that it comprises a suction gap (5.5 ') with a movable stop plate both on the top (4) and the underside (14) of the mineral wool web (1). 10. Device according to claim 7,8 or 9, characterized in that it, in combination with the suction slot (5.5 ') with the mechanically working stop plate (25,25') comprises a mechanically machining rotating brush (30). 30