JPH031428B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method for producing a fibrous band using a fibrous layered body.

[Conventional technology]

Generally, tanks that require heat retention or insulation have a plate-shaped heat insulating band wrapped around their outer circumferential surface, but in most cases this heat insulating band is made of stacked layers of inorganic fibers such as rock wool or glass wool. A fiber layered body formed in layers is used.

When using this fiber layered body as a heat insulation zone, by arranging the heat insulation zone with the fiber direction perpendicular to the outer surface of the tank, distortion due to compressive force from the outside of the tank can be reduced. It also prevents the fibers from peeling off, allowing it to fully perform its function as a heat-insulating belt.

Furthermore, in recent years, inorganic fibers have come to be used as root holders for hydrophilic cultivation of plants, and rock wool in particular has come to be widely used because the calcium silicate it contains acts effectively as a fertilizer.
When cultivating plants in this way, it is preferable for the fiber direction to be perpendicular to the surface so that the roots can grow, and for example, when growing plants such as pine for rice seedlings, the roots can be quickly removed from the soil. It is necessary to reduce the thickness of the pine in order to make it take root.

However, in the production of fibrous layered bodies, in general, inorganic fibers are spread in layers on a net conveyor, and a thermosetting resin adhesive is sprayed at the same time or after the short fibers are spread to achieve a predetermined thickness. Since the fibrous layered body is formed by adhering to the fibrous layered body, the fiber direction is formed along the longitudinal horizontal direction of the fibrous layered body.

Therefore, when such a fibrous layered body is used as a heat-retaining zone or a pine for plant cultivation, a step of changing the fiber direction to the thickness direction is required.

Conventionally, for example, a continuously produced fiber layered body is cut into strips to form a large number of strips of the same width, and after these cut pieces are transferred to another table, the orientation of the fibers is changed. A large number of cut pieces were arranged vertically on a table, and their upper surfaces were covered with a protective sheet using an adhesive or the like, and each cut piece was formed into a continuous plate-like fibrous band.

However, in such a conventional method for producing a fibrous band, there are many steps such as transporting the cut pieces of the fibrous layered body, changing the fiber direction of the cut pieces and arranging them, and furthermore, protecting the cut pieces to connect them. Since work such as gluing the sheets was done manually, work efficiency could not be improved and manufacturing costs were high.

In order to solve this problem, the present applicant has previously developed and proposed a method for manufacturing a heat-retaining zone made of a fibrous zone in Japanese Patent Publication No. 60-59150. In this method, the cut pieces are tilted 90 degrees toward the traveling direction by a stepped portion provided on the conveying means, and the fiber direction is changed to the vertical direction.

[Problem that the invention seeks to solve]

However, even in this method, the strip-shaped cut piece needs to stand on its own just before entering the stepped portion, and for this purpose, the cut thickness needs to be at least 30 mm or more.

However, with the mats for rice seeds and seedlings that have started to be used in recent years, it is necessary to cut them into thin pieces of 20 mm or less, and such thin cut pieces cannot be held by the conveying means that supports the bottom surface and the conveying means that supports the top surface. As soon as the cut pieces were turned, the cut pieces were bent, and after being turned 90 degrees, the long sides of the cut pieces were not necessarily perpendicular to the conveying direction, and the cut pieces fell in random directions.

The present invention is equally effective in producing thick fiber bands such as conventional heat-retaining belts, but in particular, thin fiber cut pieces are accurately turned by 90 degrees so that the long side after turning is aligned with the conveying direction. The aim is to form a substantially right angle.

[Means for solving problems]

The present invention continuously cuts a fiber layered body transported on a conveying means into strips to form strip-like cut pieces of the same width, while cutting the fiber layered body into strips to continuously form cut pieces having the same width, and on the other hand, cut the fiber layered body transferred on a conveying means into strips. At the lower part of the tip of the sliding plate connected to the section, there is disposed a roll-over roller whose upper part rotates in the transport direction and comes into contact with approximately the center of the cut piece being transported by the transport means, and the roll-over roller rotates the cut piece. The central part of the bottom surface of the piece is kicked out forward, and the cut piece is tilted 90 degrees with the rear surface facing downward on a conveying means installed subsequent to the conveying means to change the orientation of the fiber direction to the vertical direction. This is a method for producing a fibrous band in which the cut pieces are horizontally pressured and stacked, and then the upper and/or lower surfaces are covered with a protective sheet via an adhesive.

As for the rolling roller used in the method of this invention, the end roller of the conveyance means may have a small diameter and be installed adjacent to it, but if the thickness of the cut piece is thin, the depression between the rollers will have an adverse effect. Therefore, following the conveying means, a sliding plate portion is provided at a position that continuously extends the upper surface of the conveying means, so that the strip-shaped cut pieces are continuously connected vertically and extruded. It is preferable to provide an overturning roller in the center below the tip of the sliding plate. A delivery conveyor etc. is used as a transportation means, but
It is preferred to use a step conveyor having a pitch substantially equal to the cutting thickness of the cut pieces.

The strip-shaped cut piece that has been turned 90 degrees to become vertical has its lower surface covered by the step feed conveyor and a sliding plate placed next to it, and its upper surface pressed by a pressing conveyor and a pressing plate spring placed next to it. to prevent the cut pieces from falling over or losing their shape while being fed forward.

It is preferable that the rolling roller provided below the end of the sliding plate be provided only at the central portion of the cut piece to be fed in the width direction of the long side. If this is provided over the entire length, if one of the two ends of the cut piece comes out first, that side will be kicked forward first by this rolling roller, and the cut piece will be It will tip and fall. However, if only the central part is kicked out, even if the cut pieces are slightly deviated from the direction perpendicular to the conveyance direction, they will be averaged out and will not tilt and fall. The length of this rolling roller should be 10 to 50% of the longitudinal width of the cut piece, especially 20 to 30%.
% is preferred. In addition, if you adjust the cut pieces in advance with guide rollers, etc. so that the cut pieces are not biased in either the left or right direction when they are loaded in the center of the conveyance means, the midpoint of the rollover roller will be on the center line of the conveyance means. Set it up so that it will come. Even if the fibrous material is cut, if the cut pieces overlap each other, the friction is large and they do not slip at all. Therefore, even if an attempt is made to drop the slide plate onto the conveying means below by simply adding a step from the tip thereof, the slide plate will not slide down with the bottom surface first. If it falls, the top end will fall forward, but if the thickness of the cut piece is thin, the cut piece may break midway when it falls forward like this, or the left and right sides will fall at different times, causing it to bend in the direction of conveyance. It gets bumpy and falls.

The primary role of the overturning roller is to separate the overlapping cut pieces. Therefore, this rollover roller has a roller that is symmetrical about the midpoint of its length in the axial direction and has at least partially anti-slip features such as a large number of blade-shaped protrusions parallel to the axial direction. It is preferable to use a roller to kick the lower surface of the cut piece forward to prevent surface overlap with subsequent cut pieces.

The rollover roller is a multi-wheeled roller in which a plurality of circular flange-shaped rollers each having a plurality of blade-shaped protrusions extending in the axial direction around the circumference to prevent slipping are arranged symmetrically at a predetermined distance from each other. Most preferably, rollers are used. The diameter of this rollover roller is preferably about 30 to 70 mm, and the rotation speed is 300 to 70 mm.
Approximately 500 rpm is preferable.

〔Example〕

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings.

In the manufacturing process of the fibrous belt shown in FIGS. 1 to 3, an inorganic fiber material 1 made from natural rocks such as basalt, blast furnace slag, glass, etc. is blown from a cotton aggregate 2 onto a net conveyor 3. The fibers are accumulated in a layered manner and are bonded together in an entangled state with a liquid adhesive sprayed from the nozzle 4, for example a thermosetting resin such as phenolic resin, and are continuously formed into a fiber layered body 7. The fiber layered body 7 is compression-molded to a predetermined thickness by passing through compression rollers 5, 5' and 6, 6' provided on the net conveyor 3 and a heating chamber (not shown). The fiber layered body 7 is arranged such that the fiber direction is mainly along the longitudinal horizontal direction of the fiber layered body 7.

The fiber layered material 7 formed in this manner advances on a transfer conveyor 8 which is a first conveying means, and when passing under a cutting device 9, the fiber layered material 7 is cut in the traveling direction by this cutting device 9. is a strip cut piece 1 that is cut into strips one unit at a right angle and has the same width.
Continuously formed as 0. Note that the speed of the transfer conveyor 8 and the time interval during which the blade of the cutting device 9 descends are strictly controlled, so that the width of each cut piece 10 is kept constant.

The cut pieces 10 thus formed further advance on the transfer conveyor 8, and are pressed from above by a presser conveyor 35 to prevent them from falling over. In particular, it is preferable to use such a presser conveyor 35 in order to apply it to thin cut pieces 10 as well. Transfer conveyor 8
is intermittently fed in pitches substantially equal to the cutting width so as to match the time interval in which the blade of the cutting device 9 descends. Therefore, the cut piece 10 is also pitch-fed substantially over the cutting width. The end pulley disposed at the end of the transfer conveyor 8 may have a small diameter and be connected to the overturning roller 12, but if the end pulley of the transfer conveyor 8 has a large diameter, there may be a gap between it and the overturning roller 12. Since there is a risk that the rows of cut pieces 10 may be misaligned or bent due to openings, it is preferable to provide a supporting sliding plate 13 as shown in FIG. In addition, cut piece 1
It is preferable to provide a holding means such as a holding plate spring 11 on the upper part of the cut piece 10 in order to hold down the cut piece 10 until it is kicked out from the holding conveyor 35.

A cut piece 10 is provided at the lower front of the distal end of the support sliding plate 13.
A rollover roller 12 is provided that kicks only the lower surface of the central part forward. This rolling roller 12 has an anti-slip surface at least partially in the form of a rough surface or a groove extending in the axial direction of the roller so as to generate sufficient frictional force between the surface and the lower surface of the cut piece 10. It is preferable to use a roller 34 with a surface groove (see FIG. 4). More preferably,
As shown in Fig. 3, a plurality of circular flanged rollers each having a large number of blade-shaped protrusions extending in the axial direction around the rollers to prevent slipping are spaced apart from each other by a predetermined distance by sandwiching a spacer between them. A multi-wheel roller 33 that is fixed and symmetrically provided is suitable.

It is preferable that the left and right sides of this overturning roller 12 be provided with sliding plates 28 as shown in FIGS. 3 and 4. When the lower surface of the cut piece 10 that has been pushed out to the end of the conveying means is kicked forward by the frictional force of the surface of the overturning roller 12, a symbol 1 is shown in FIGS. 1 and 2.
As shown at 4, the cut pieces 10 are separated, their rear surfaces are conveyed by the transversal rollers 12, and the cut pieces 10 are laid down at 90 degrees with the rear surfaces facing down on the subsequent second conveying means 16, and the rear surfaces of the cut pieces 10 are turned down in the direction of the fibers. The direction is changed to vertical and sent.

The speed of this second conveyance means 16 is slightly faster than the pitch feed speed of the transfer conveyor 8 which is the first conveyance means, and the next third conveyance means 20 is faster than the second conveyance means before it. 16, the direction of the fiber direction is changed to the vertical direction, and the cut pieces 10 that advance at intervals as shown by reference numeral 15 in FIG.
On the third conveyance means 20, the sides are brought into close contact with each other. As shown in FIG. 1, it is preferable that the second conveying means 16 be positioned below the overturning roller 12 with a slight step, but if the diameter of the overturning roller 12 is increased, the first conveying means It is possible to roll the conveyor 8 by 90 degrees without providing a step between the transport conveyor 8 and the transport means 16.

The third conveying means 20 is constituted by a pan conveyor, on which the stacks 17 of the cut pieces 10 pressed against each other in the horizontal direction are kept so that their upper surfaces are at approximately the same height due to the horizontal bottom surface of the third conveying means 20. When the adhesive is transferred while being held and passes under the adhesive applicator 18, the hot melt adhesive, which has been heated and melted to a predetermined temperature in the adhesive applicator 18, is sprayed from the spray gun 19 onto the upper surface of the aggregate 17. A hot melt coating layer is formed. Following this adhesive application step, the protective sheet 22 supplied from the sheet roll 23 is adhered at the pressure roller 21 while covering the upper surface of the assembly 17 via the adhesive application layer, thereby achieving a predetermined surface coating. A fibrous band 24 is obtained in which layers are formed continuously.

In addition, although the above embodiment describes a method of spraying hot melt adhesive, other polymer adhesives or inorganic adhesives may also be used, and a roll coater method may be used instead of spraying. good. The continuously supplied fibrous band 24 is transported by a feed conveyor 25 which is a fourth conveying means, and after cutting both sides, it is cut into a fixed size by a finishing cutter 26 to form a plate-shaped fibrous band 27. is obtained. As the protective sheet 22, materials such as glass cloth, glass fiber non-woven fabric, cheesecloth, kraft paper, or aluminum kraft paper are used. It is also possible to coat each lower surface.

Note that the reference numeral 28 is a sliding plate that serves to slide down the left and right portions of the cut piece 10, and the reference numeral 29 is a pulley of the second conveying means 16. In addition, FIG. 4 shows a fiber layered body 10 cut into strips.
While holding the upper part with the presser plate spring 11, the cut piece 1 is fed in pitches, and the cut piece 1 is released from the presser as shown by reference numeral 32.
0 is kicked out from its underside by the rollover roller 34,
FIG. 3 is a perspective view showing the cut pieces 10 kicked out as indicated by reference numeral 14 being conveyed on the second conveying means 16 as indicated by reference numeral 15 while being separated from each other. The overturning roller 34 has an axial groove-shaped anti-slip groove on its surface, and the 30
indicates its driving means, and 31 indicates a bearing. When a step is not provided between the support sliding plate 13 and the second conveyance means 16, it is necessary to provide a simple support and feed means in the gap between the overturning roller and the rear conveyor. In this case, it is convenient to link it to the driving force of the overturning roller.

[Effect]

Fibrous materials such as fibrous layered materials have large friction when the plates overlap and are pressed together, and even if they are pushed out and released from the sliding plates and retaining plate springs, they are especially thin and the weight of the cut pieces themselves is light. In that case, it won't slip at all. Furthermore, if a head is simply provided, the overturning speed is slow, especially when the thickness is thin, and the position is also likely to be unstable due to inaccuracy.

In the present invention, the bottom side of the cut piece at the end is kicked out forward by the lower rolling roller, so the friction between the plates is released, and the cut piece is turned 90 degrees and automatically transferred to the rear conveyance means. It will be sent. In this case, since the overturning roller contacts only the central part of the cut pieces and kicks them out, the length direction of the cut pieces loaded on the conveying means is substantially perpendicular to the conveying direction. It is placed uniformly on the left and right sides, and when stacked together on a conveyor such as a bread conveyor, both left and right ends are neatly pressed and pressed, minimizing unnecessary removed parts that occur when cutting both sides later. be able to.

The application of adhesive to the pressure-welded aggregate, the adhesion of the protective sheet, and the cutting to a certain size can all be done automatically, so even extremely thin fibrous strips can be easily handled without problems such as breakage. Can be manufactured in a minimum amount.

〔Effect of the invention〕

According to the method of the present invention, it is possible to continuously and easily produce a fibrous band whose fiber direction is perpendicular to the flat surface, especially a thin fibrous band whose thickness is 30 mm or less and cannot stand up on its own. As a result, manufacturing efficiency can be improved, the number of workers can be reduced, the amount of waste cotton generated can be reduced, and manufacturing costs can be reduced.

As for the means for changing the fiber direction of the cut pieces, a rolling roller is used that contacts only the widthwise central part of the strip-shaped cut pieces, so it can be installed easily and inexpensively, and it can also be used to change the fiber direction of thin cut pieces. Also, it can be automatically placed on the conveying means at right angles to the transportation direction and with the left and right sides aligned, which has the effect of facilitating maintenance, operation management, etc.

[Brief explanation of drawings]

FIG. 1 is a manufacturing process diagram showing an embodiment of the means for manufacturing a fibrous band according to the present invention, FIG. 2 is a partially enlarged view of FIG. Figure 3 is a view from line A-A in Figure 1;
FIG. 4 according to another embodiment is a perspective view showing the movement of the cut piece near the overturning roller. Explanation of symbols, 1... Inorganic fiber material, 2... Cotton collection chamber, 3... Net conveyor, 4... Adhesive spray nozzle, 5, 5', 6, 6'... Compression roller, 7...
... Fiber layered body, 8 ... Transfer conveyor (first conveyance means), 9 ... Cutting device, 10 ... Cut piece, 11
...Press plate spring, 12...Roller for rolling over, 13...
...Support sliding plate, 14... State where the cut pieces are kicked out, 15... State where the cut pieces are turned in the fiber direction by 90 degrees, 16... Second conveyance means, 17... Accumulation of cut pieces, 18... Adhesive application device, 19... Spray gun, 20... Third conveyance means (pan conveyor), 21... Pressure roller, 22... Protective sheet,
23... Protective sheet roll, 24... Fibrous band,
25...Feeding conveyor (fourth conveyance means), 26
... Finishing cutter, 27 ... Cutting to size fibrous band, 28 ... Sliding plate, 29 ... Pulley of second conveyance means, 30 ... Drive means for rolling roller, 3
DESCRIPTION OF SYMBOLS 1... Bearing of roller for rolling over, 32... State where the cut piece is released from the presser plate spring, 33... Multi-wheel roller (roller for rolling over), 34... Roller with horizontal grooves on the surface (roller for rolling over), 35 ...presser conveyor.

Claims (1)

[Scope of Claims] 1. The fiber layered material transported on the transport means is cut into strips to continuously form strips of the same width, while the fiber layered body transported on the transport means is cut into strips, and the fiber layered body transported on the transport means is continuously formed into strips having the same width. At the bottom of the tip of the sliding plate connected to the end of the means, there is disposed a rollover roller whose upper part rotates in the transport direction and comes into contact with approximately the center of the cut piece being transported by the transport means, and this rollover roller The central part of the bottom surface of the cut piece is kicked out forward, and the cut piece is placed on a conveying means installed subsequent to the conveying means, and the cut piece is tilted at 90 degrees with the rear surface facing downward to change the direction of the fibers to the vertical direction. . A method for producing a fibrous band, which comprises stacking the modified cut pieces horizontally and then covering the upper and/or lower surfaces with a protective sheet via an adhesive. 2. The roller according to claim 1, wherein the axial midpoint of the rolling roller is substantially aligned with the midpoint of the width of the strip-shaped cut piece, and the roller is arranged so that the top surface of the roller contacts the bottom surface of the cut piece. A method for producing a fibrous band. 3. The method for manufacturing a fibrous band according to claim 1, wherein the rolling roller is a roller whose length in the axial direction is 10 to 50% of the width of the cut strip. 4. The method for manufacturing a fibrous band according to claim 1, wherein the rolling roller has a non-slip surface on its axial center surface. 5. The overturning roller is a multi-wheeled roller in which a plurality of circular flange-shaped rollers each having a large number of blade-shaped protrusions extending in the axial direction around the circumference to prevent slippage are arranged symmetrically at a predetermined distance from each other. A method for producing a fibrous band according to claim 1. 6. The method for manufacturing a fibrous band according to claim 1, wherein the means for conveying the cut strips is a step conveyor having a pitch substantially equal to the cutting thickness. 7. The method for manufacturing a fibrous band according to claim 1, wherein the continuous row of cut strips is held in an upright position by pressing the top surface of the continuous row with a pressing conveyor or a pressing plate spring.