JPH01500043A - Method and apparatus for producing mineral wool web - Google Patents

Abstract

PCT No. PCT/FI87/00054 Sec. 371 Date Oct. 20, 1988 Sec. 102(e) Date Oct. 20, 1988 PCT Filed Apr. 24, 1987 PCT Pub. No. WO87/06631 PCT Pub. Date Nov. 5, 1987.The invention relates to a method and a device for producing a mineral wool web from a thin primary web formed on a movable collecting surface (6). According to prior known methods, the primary web is folded on a receiving conveyor (18) in an overlapping configuration so that the desired thickness of web is achieved. It is also known to combine two or several primary webs and to form the final mineral wool web by folding. The problem when producing mineral wool webs is the high rate of production of the primary webs and consequently, the high requirements on the devices in the further process and a great loss of material because of uneven edges which have to be cut down. According to the invention, the primary web is split into separate sheets before the deposit on the receiving conveyor (18), and the sheets are deposited by an oscillating distributing conveyor (16) in an overlapping configuration on the receiving conveyor, or, in case sheets are being produced, stacked on top of each other. The method offers several possibilities of reducing the feeding rate of the sheets and thus facilitating the deposit on the receiving conveyor. The flow of split sheets may for instance be separated (11, 12) into two or several flows to an intermediate conveyor each (14, 15) and the sheets may be stacked before the deposit. The cutting of the primary web may be performed on the collecting surface (6) or optionally after this on an intermediate conveyor.

Description

[Detailed description of the invention] Method and apparatus for producing a mineral wool web The present invention provides a method and apparatus for producing a mineral wool web. Regarding the method and apparatus for manufacturing, more precisely, claims 1 and 1 Concerning the method and apparatus defined in the preamble of Section 6.

Mineral wool is a product with countless fields of application, the main among which are insulation and as a sound insulation material.

However, mineral wool products were originally made from fiber bundles of main knitting for the past 40 years. Therefore, we decided to introduce a binder between the mta and harden the composition. Thus, a more or less monolithic shape, most often a matte shape (this is (cut to desired size in a pan).

Typically, the production of mineral wool products involves converting mineral raw materials into furnaces, such as electric furnaces or cubicle furnaces. This is done by melting it in a furnace. The melt is passed from the furnace, usually through a series of high A defibration device consisting of a cylinder that rotates at high speed is indispensable. These fluids naturally flow out and flow onto these mantle surfaces. The melt rotates When it hits the mantle surface, it sticks and gains acceleration, and finally the melt is subject to centrifugal force. It will pop out continuously due to the effect. This allows the melt droplet to spread. Forms stretched fibers. mta initially pops out in a plane perpendicular to the axis of the opening cylinder, These flowing webs are deflected from the plane by the directed gas flow. perforated conveyor belt, net conveyor, or perforated conveyor belt through which this gas flow passes. collection member consisting of a perforated apron conveyor or one or several perforated drums; On the other hand! The a-fibers are deposited on the surface of the collection conveyor.

In traditional collection processes, the collection of mta is performed by depositing the desired gram amount directly onto the collection member. This is done in l steps since the grammage is obtained. Adhesives are generally Deflecting the liquid adhesive wLta to carry the fibers and adhesive together towards the collection member It was introduced by spraying into the stream. Cords with the desired gram age The web is then led to a tempering furnace where the product is given the appropriate width and thickness and Sometimes the adhesive is fixed. This is followed by cooling, formatting, and possibly surface treatment. processing, and packaging.

Obtaining as regular and homogeneous product as possible, increasing insulation capacity and Obtain a product that is as stretchable as possible (this requires the u7Am to stretch in the product plane) ), which allows the product to be compressed during the packaging and transportation process. The goal is to

To accomplish this, only one relatively thin nib is collected onto the collection surface.

The gram age ranges from 100 to 450 g/m2. In this way, The fibers are ordered and well oriented and the adhesive is evenly distributed within the web. capacity In order to make one nib thinner while keeping the volume at the desired level - the next nib should be as high as the proportion of the next device.

According to the procedure used so far - the next nib is placed in place by a folding process. The result is a final web with the desired gram age. Fold in one or several steps , resulting in a final web having 6 to 20 layers.

- The next web may be doubled before folding, according to other known processes. , some nibs from multiple collecting members are overlapped and folded simultaneously.

According to the methods used to date, one nib obtained is always Treated as a close-fitting mat, which can be doubled, folded and/or Laminated by lamination.

When partially folding a nib, a reversible conveyor is usually used and the output step The exit of the conveyor to avoid folding and stretching of the mat in the between the conveyors while reciprocating the force end at a speed essentially equal to the feed rate of one nib. supply one nib to the other. Reversible mechanisms most often accept end positions. at the highest position, higher than the conveyor, and closest to the conveyor to receive the bottom dead center of the pendulum. This is achieved by arranging the This technology is disclosed in patent application SE 8403, for example. 519-5. The folding process - then the whole part of the nib is based on There is also a configuration in which it is deposited directly above at a constant height.

Such a method is shown, for example, in application SE 8403520-3.

The disadvantages of the processes used so far are as follows.

- The weight of reversible conveyors is relatively large, which allows for acceleration and The speed puts a lot of stress on the stand and the crank mechanism that moves the pendulum. It turns out.

- The oscillating surface of a reversible conveyor is large and carries a large amount of air in motion during oscillation. Air resistance against these surfaces places significant mechanical stress on the pendulum mechanism. bring about

Since monomineral wool fibers tend to float in the air stream, the oscillatory motion of the pendulum is cause dust problems.

The edges of the final web are fully folded and some - the next nib is reversible on the conveyor. Due to irregularities and erratic movements of some nibs, especially at the folding point, when exiting the In part, the receiver has irregularities that occur during folding due to the forward movement of the conveyor. ing. This percentage will vary depending on the desired gram age of the final web. be satisfied To obtain a product with sharp edges, it is necessary to saw the edges over a large area. This means a loss of 0.5 to B$.

- Yet another problem is that if the gram age is 100 g/m2, in some cases 2 The pendulum cannot cope with the high speed of some webs, which can reach 00m/win. A production capacity of 3 to 5 tons is required. The folding result is bad and the pendulum is mechanically unstable. I can't stand the stress.

It is an object of the present invention to reduce the collection of thin, one-piece nibs necessary to yield the desired production capacity. can be carried out at high speed and without the above-mentioned disadvantages to the web forming process. A method and a method capable of transferring one nib detached from a collection member to a final web. and equipment.

The present invention relates to a web forming process between opening and finished mineral wool web. The main features of the method and device according to the invention with respect to the part of claim 1 are as follows: and the characteristics section of Section 16.

Thus, the present invention provides a method for depositing mineral wool on a receiving conveyor to form a final mineral wool web. The process consists in separating the continuous partial nib into separate sheets before stacking. The seat is , a suitable conveyor on the receiving conveyor so that the desired gram age can be obtained. It is deposited by a structure in which these are superimposed. Deposition is done as separate sheets It is clear that the problems caused by the reverse movement have been completely eliminated. be. Folding irregularities are also eliminated and at the same time perfectly flat edges can be achieved. Deposition can be controlled to the desired level.

Partial nib splitting can be done either directly on the collection surface or after this on an intermediate conveyor. Rubbing takes place between two intermediate conveyors.

When making a division on the collection surface, preferably a perforated drum is used as the collection surface. It will be done. However, the splitting is not possible with flat collections such as various perforated conveyor belts. It can also be done on the surface. Perforated mantle surfaces can be used with counter surfaces or Grooves are formed that are equally distributed over the entire mantle surface, whereas - A cutting device is provided for cutting the nib. Track spacing is the desired sheet length It corresponds to The cutting device may be guillotine type or the cutter may be 6 preferably on a roll that rotates in contact with the collecting drum so that it hits the drum with a groove The drum may also be mounted with an outer circumferential surface corresponding to a length of, for example, 5 sheets, Large diameter so it can have five cutters for hitting the counter surface of the ram It may have.

Are the cutting equipment and parallel counter surfaces on the drum parallel to the drum axis? , or at a slight angle to this. In the former case, the divided The sheet can be square or rectangular, in the latter case parallelogram-shaped.

Splitting a single nib into multiple sheets can also be done without using cutting equipment. However, cutting equipment is usually used to ensure a predetermined web distribution. used. This splitting process results in a build-up of fibers at the point where the web is split. This is done by making sure that they do not accumulate. For this purpose, perforated webs are Formed with a seamless elongated gap as described above or at a slight angle to this, thus the suction acting on the inside of the drum. The force affects only the perforated surface that attracts the fibers to the surface, and The gap is essentially m! There remains no I.

Separation of the divided sheets may be performed by any known method, preferably by evacuation. Ru. When the cutting device is installed on a roll whose circumference corresponds to the sheet length, the system the drum over the mantle surface until it reaches the exhaust system located below the mantle. is carried continuously. A cutting device is placed on a roll whose circumference corresponds to several sheet lengths. If the The sheet may then be peeled off onto one or more intermediate conveyors by evacuation. , the conveyor receives the sheet and conveys it to the conveyor.

The process according to the invention is applied by performing a division after the collecting surface. cutting into sheets is done on an intermediate conveyor or between two conveyors. . Advantageously, the cutting device consists of a guillotine-type cutter.

Particularly when this process is applied in conjunction with on-drum collection - It is possible to reduce the speed of the intermediate conveyor relative to the collection speed. This is the main feature of the present invention. This is one of the main purposes.

Separation from the drum is done at two separate locations for each intermediate conveyor. can be placed. This is before the receiver sends out the sheet onto the conveyor. death Therefore, the speed of the intermediate conveyor is half the peripheral speed of the drum.

Zero separation increasing to 1/3 or 1/4 is achieved by alternating exhaust systems. It can be arranged so that

A supply conveyor is connected to each intermediate conveyor. The supply conveyor is horizontal It consists of a conveyor that oscillates in the plane, while an intermediate conveyor conveys sheets or stacks. In addition to transporting the stacked sheets, the sheets will also be transferred onto the conveyor. send

The receiving conveyor is preferably transverse to the conveying direction of the supply conveyor, i.e. It is operated perpendicularly or at a small angle to the sheet production direction. When receiving, the conveyor direction is in the middle. If the sheet deviates slightly more than 90° to the direction of movement of the conveyor, the sheet is advantageous. In particular, it has a parallelogram shape.

The receiving conveyor can also have the same direction of movement as the supply conveyor. finished mineral woo The fiber direction of the le web is therefore the longitudinal direction and the transverse direction as in the previous case. Become the opposite.

Yet another way to reduce the speed of the feed conveyor is from cutting to feeding, i.e. is a stacking device that stacks sheets on top of each other during conveyance from transfer to a conveyor It is to arrange. This can be done in several ways. in this is carried out by means of a perforated conveyor mounted on an intermediate conveyor, e.g. Instantly absorbs the sheet and then transfers it to the next sheet, rotation or movement. Therefore, if you want to reach the next sheet correctly, here is a method to place it on the next sheet. be able to. Another method is to guide every other sheet onto a conveyor and then re-roll the sheets. The purpose is to guide you onto the next seat. However, such stacking equipment The location is known per se.

By rotating the stacking device, the fiber direction of the final web is changed. one Every other time the sheet is rotated, for example by 90°, so that half of the sheet is One half has a transverse fiber direction. This results in extremely homogeneous A mineral wool web is formed.

The process according to the invention can also be used for the continuous production of laminated mineral wool webs. Can be done. 1 or several further supply conveyors, as known per se. By the process of forming sheets or layers of various materials, e.g. nets, woven glass m The textiles etc. are transported directly onto the mineral wool sheet, whereby the different materials are transferred to the other sheets. It enters the web as overlapping sheets along with the web.

The process according to the invention can of course also be used for the production of mineral wool boards. This allows the cut sheets to be stacked directly to the desired amount, and the conveyor is stopped. do. In this method, sheets of different materials are transported by separate feed conveyors to an intermediate conveyor. Manufacture of sandwich elements, conveyed on sheets placed on a bear or receiving conveyor It is particularly suitable for

Next, the present invention will be described in detail as a preferred embodiment with reference to the accompanying drawings. In the drawing 0, FIG. 1 shows a longitudinal section of the apparatus for carrying out the process according to the invention. Show the face.

Figure 2 shows an example of the modification of the device according to Figure 1 as a longitudinal section, and an intermediate conveyor. In A, the integrated equipment is excluded.

FIG. 3 shows a schematic longitudinal section of a modification of the device according to the invention, in which the collecting surface is It consists of a triangular net web and the equipment following the intermediate conveyor is excluded.

The same reference numbers refer to the same objects in different figures.

Reference numeral 1 designates a melting furnace from which the obtained melt flows into the flue designated by 2. The fibers flow through the opening to the opening device shown at 3. The number 4 indicates the so-called wool chamber, and the 5 Showing a suction box installed inside the collection conveyor 6, the melt flows to the opening device; The opening device uses gas to eject molten droplets and stretch them into fibers using centrifugal force. The flow deflects the fiber stream towards the collecting conveyor 6. Here, the collection conveyor is It consists of a drum. Suction box attached tightly to the inner surface of the drum attracts fiber flow. This allows the fibers to be deposited onto a drum that is rotating at high speed. Stack to form one thin nib. Reference numeral 7 indicates a system consisting of rotating rolls. The number 8 indicates another roll that rotates in contact with the outer surface of the drum. This roll forms a cutting roll and therefore - for cutting the next nib. A second cutting blade 9 is provided. Cutting base or cutter counter surface is a groove or track lO consisting of perforated discontinuities. In this way, - next The nib undergoes signs of failure or failure at this point. Track 10 is a sign of failure If this occurs, a cutting blade is required to complete the web cut. truck If the cutting reaches the point of breaking the mat, the cutting device may be removed. Reference number 1 1 and 12 indicate the exhaust points for some nibs, these alternate.

Cut sheets are transferred to intermediate conveyor 14 every second, and to another intermediate conveyor 15 every second. separate into The intermediate conveyors indicated by numbers 14 and 15 are of the conventional type. Ru. Sheets are transferred from an intermediate conveyor to a supply conveyor 16 consisting of an oscillating horizontal conveyor. and 17 respectively. Is the supply conveyor an intermediate conveyor at the left hand position? In this embodiment, the sheet is received from the machine and passed to the receiving conveyor indicated by 18 at its right-hand end. , the receiver conveyor moves across the feed conveyor and the finished mineral wool web is This results in a substantially transverse fiber direction. The conveyance speed of the intermediate conveyor is the same as the part on the drum. The speed of movement of one nib is the same, while the sheet is fed to two feeding conveyors. The speed of the feed conveyor is only half this. The superimposed sheets are indicated by 19 and 20 -C. Feeding conveyor speed The degree is adapted to the feed rate of the sheet, thus obtaining the desired overlap and resulting in the desired obtain a web thickness of

The trays are gradually deposited on the conveyor 18, stacking the desired number of sheets and forming the desired number of sheets. It is clear that a thick multilayer board can be obtained. After this, the supply conveyor takes l steps It moves forward and starts depositing on the next multilayer plate. This process is a sandwich can be used advantageously when manufacturing elements, thereby producing the desired discrete material is preferably added to the sheet pile by another supply conveyor. sandow The switch elements can be manufactured sequentially with different layers superimposed in any order. Ru.

Reference numeral 21 indicates a stacking device, which is one of the intermediate conveyors, in this case is advantageously arranged to cooperate with the conveyor 14. Stacking M21 absorbs every other sheet momentarily and then deposits it onto the next sheet. It is a perforated conveyor. In this way, the feeding speed of the sheets that have been fed decreases. , the feed conveyor speed can be correspondingly reduced.

FIG. 2 shows a collection drum 6 in which the fiber stream strongly thrown from the opening device accumulates; Only the cutting and suction roll 22 rotating in contact with this drum is shown. . The collection drum shall be provided with an unperforated groove that will cause signs of failure or failure. It is being In the present invention, the final separation of the sheets is ensured by the cutter 23. becomes. The cutters are arranged at equal intervals on the outer circumference of the roll 22, and the cutters are arranged at equal intervals on the circumference of the roll 22. The distance corresponds to the seat length plus the length of the sign of failure. Tangent line between roll and drum After cutting at the position, the cut sheet is passed through an exhaust device 24 and a suction box 25 installed inside the roll. It is blown toward the roll 22 by. The seat is preferably placed immediately after the suction box Separated onto intermediate conveyor. Subsequent processes are then described in connection with Figure 1. Corresponds to the example. The cutting and suction roll 22 is arranged, for example, on the mantle surface. May have a large diameter consisting of 4 of the five cutters installed, the sheet flow is the first It is advantageous to separate the supply conveyor into two intermediate conveyors as shown in the figure. Speed can be reduced.

FIG. 3 schematically shows the deposition of fiber streams on the collecting surface of a triangular web. Exit germ chamber 4 After that, the next web is conveyed onto a horizontal conveyor, on which it is cut into sheets. A decision is made. Cutting is performed using a guillotine-type cutter 26 or the same cutting machine as described above. This can be done by a cutting tool or any other known cutting device.

Again, the further process is carried out according to the embodiment of FIG.

The invention is not limited to the embodiments described, but may be modified within the scope of the following claims. Can be done.

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Claims (1)

[Claims] 1. A shape is formed from the mineral fibers that are showered from the opening device (3) and guided to the collection surface (6). A method of forming a mineral wool web from several layers of a primary web formed by This allows the primary web to which the binder has been added to overlap the layers to the desired web thickness. and then separated from the collection surface and transferred to a receiving conveyor (18), The primary web is separated while forming a sheet stream before being deposited on the receiving conveyor (18). A mineral wool web characterized in that it is divided into sheets (18, 20). How to form. 2. If the collection surface is perforated drum, perforated conveyor belt, perforated apron co It consists of known devices such as conveyors or net conveyors, in which the division is carried out on the collecting surface ( 6) A method according to claim 1, characterized in that it is carried out as above. 3. If the collection surface is perforated drum, perforated conveyor belt, perforated apron co It consists of known devices such as conveyors or net conveyors, in which the division is carried out on the collecting surface ( 6) The method according to claim 1, characterized in that it is carried out after step 6). 4. The splitting is caused by the non-perforated surface of the collecting surface (6) causing failure of the primary web. This is done by forming a sign or fracture, and the non-porous surface No web-forming fibers are deposited on these surfaces and after this the non-porous surfaces are deposited. The division is performed by cutting with a cutting device (9) that cuts the surface. 3. The method according to claim 1 or 2, characterized in that: 5. The divided sheets are moved by a drum (22) acting by suction (25). It is separated from the collection surface, from where the sheet is transferred in a known manner to an intermediate conveyor (14, 15) and further sent to a receiving conveyor (18). A method according to any one of claims 1, 2 and 4. 6. Separation of the sheet from the collection surface is by alternating exhaust or similar means. Performed at 1, 2 or 3 points (11, 12) with 1, 2 or 3 intermediate points conveyor (14, 15) and further to a single receiving conveyor (18). Any one of claims 1, 2, 4 and 5, characterized in that: The method described in. 7. The collection surface consists of a perforated drum (6) and the division is carried out on a counter surface e.g. While equal to the mantle of the collecting drum to cut against the track or gap The cutting devices (9) are placed at a distance corresponding to the desired sheet length. Claim 1 or claim 1 characterized in that the cutting is carried out by cutting The method described in Section 2. 8. The division forms an angle perpendicular to or oblique to the edge of the primary web. Any one of the preceding claims characterized in that the invention is carried out along parallel lines consisting of Method described. 9. The sheet receiving conveyor moves in the direction of sheet production, thereby depositing the finished wafer. The fiber direction of the sheet in the web is the same as the fiber direction of the primary web. A method according to any of the preceding claims. 10. The sheet receiving conveyor (18) moves in a direction transverse to the sheet manufacturing direction, This allows the fiber direction of the sheet in the finished web to match the fiber direction of the primary web. Any one of claims 1 to 8, characterized in that it is rotated by 90° with respect to the The method described in. 11. The sheets are arranged on a receiving conveyor (18) in the direction in which the sheets are produced. A method according to any of the preceding claims, characterized in that: 12. A portion of the sheet, e.g. one sheet, is deposited on a receiving conveyor. Any one of claims 1 to 10, characterized in that it is rotated 90° forward. The method described in. 13. Some of the sheets, preferably every other sheet, are placed on an intermediate conveyor (14) or Other sheets lifted to a position above this and placed on this intermediate conveyor The superimposed sheets are returned to the top and placed on the receiving conveyor (18) as a single sheet. A method according to any of the preceding claims, characterized in that it is arranged in a. 14. Intermediate conveyor (14) to give new properties to the mineral wool mat or on the sheets of the primary web on the receiving conveyor. or sheets or layers of different fiber structures are placed. The method described in any of the boxes below. 15. Furnace (1) for melting mineral lumps, opening device (1) for throwing out mineral fibers 3), a device for creating a gas flow, directing the fibers towards a movable collection surface (6); Suction device (5) for guiding, device for introducing binder between the fibers, collection The primary web formed on the surface is separated and transferred to an intermediate conveyor. equipment for curing the mineral wool web and a furnace for curing the mineral wool web. is arranged in front of the receiving conveyor to separate the primary web into separate sheets (18, 19). Features devices (9, 23, 26) that divide and form sheet flow Apparatus for carrying out a method according to any of the preceding claims. 16. Collection surfaces include perforated drums, perforated conveyor belts, perforated aprons, etc. It consists of known equipment such as a conveyor or net conveyor, and a cutting device collects A cutter ( 9) and that the outer circumference of the roller corresponds to the distance between the counter surfaces. 16. The device according to claim 15, characterized in that: 17. If the collection surface is perforated drum, perforated conveyor belt, perforated Ebron, etc. It consists of known equipment such as a conveyor or net conveyor, and a cutting device collects The rollers (22) rotate at equal intervals on the mantle surface of the roller (22), which rotates in contact with the surface. cutter (23), which allows the distance between the cutters to be the same as that between the counter surfaces. 16. Device according to claim 15, characterized in that it corresponds to a distance. 18. a roller receives the cut sheet on its mantle by a suction device (25); From there, the sheets are separated onto an intermediate conveyor (14). Apparatus according to scope 17. 19. It has a perforated drum as the collecting surface, and the cutting device is parallel to and parallel to the collecting surface. (6) Equally spaced counter-surfaces in the mantle, e.g. arranged to cut against a block or gap, thereby reducing the distance The device according to claim 15, characterized in that it corresponds to a desired sheet length. . 20. It has a perforated drum as a collection surface and the fibers are deposited on the gap surface. The primary web thus formed on the drum is free of any signs of failure or setbacks. A claim characterized by unperforated, parallel and equally spaced gaps that cause The device according to claim 15. 21. Parallel tracks or gaps are also parallel to the axis of the drum or forming a small angle with respect to this direction. 20. The device according to any of paragraph 19. 22. Acting on the collecting drum (6) by means of an evacuation device for the divided sheets characterized by one or more, preferably two, separation points (11, 12); Therefore, the separation points alternate to separate the sheets onto the intermediate conveyors (14, 15). The apparatus according to any one of claims 15 to 22. 23. A splitting device separates the primary web as it moves towards the intermediate conveyor. It consists of a cutter arranged to cut at intervals, whereby the intervals are Claims characterized in that they correspond to the time required by the primary web to travel a long distance. Apparatus according to scope 15. 24. The intermediate conveyor for transferring to the receiving conveyor oscillates in a horizontal plane. Claims 15 to 23, characterized in that it consists of a conveyor (16). Apparatus according to any of paragraphs. 25. On one intermediate conveyor (14), the sheet is lifted and placed on the intermediate conveyor. A stacking device (21) that can be placed on top of other sheets in the Alternatively, a combination of conveyor and exhaust system is installed, which allows double sheets to be of claim characterized in that it is placed on the receiving conveyor (18) as a single sheet. Apparatus according to any of the ranges 15 to 24. 26. characterized in that the stacking device 21 is rotatable by 90° or 180° 26. The apparatus according to claim 25. 27. Claim characterized in that the stacking device (21) is removable. Apparatus according to paragraph 25 or paragraph 28. 28. The receiving conveyor (18) moves transversely to the production direction of the primary web. The device according to claims 15 to 27, characterized in that Place. 29. The receiving conveyor (18) moves in the same direction as the production direction of the primary web. The device according to claims 15 to 27, characterized in that: . 30. Formed on a movable collection surface of mineral fibers showered from an opening device A method of producing a mineral wool sheet from multiple layers of a primary web, the method comprising: separate sheets while forming a sheet stream on the collection surface or on a subsequent intermediate conveyor. From the intermediate conveyor, the sheets are delivered to the receiving collage in a known manner with the desired stacking amount. Mineral wool, characterized in that it is transferred to a chamber (18) and subsequently cured. How to manufacture sheets.