JPS6059150B2 - Manufacturing method of fibrous heat insulation belt - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for manufacturing a fibrous heat-insulating belt formed using a fibrous layered body.

Tanks, etc. that generally require heat retention or insulation properties,
A plate-shaped heat insulating band is wrapped around the outer circumferential surface of the heat insulating band, and in many cases, a fiber layered body formed by stacking inorganic fibers such as rock wool or glass wool is used as the heat insulating band.

When using this fibrous layered body as a heat insulation zone, by arranging the heat insulation zone formed so that the fiber direction is perpendicular to the outer surface of the tank, it is possible to reduce the strain caused by compressive force from the outside of the tank. It also prevents the fibers from peeling off, allowing it to fully perform its function as a heat insulator.

However, the production of fibrous layered bodies is generally done by scattering inorganic short fibers in layers on a net conveyor, and using a thermosetting resin adhesive sprayed at the same time or after the short fibers are spread. Since the fibrous layered body is formed by adhesion and curing to a certain thickness, the fiber direction is formed along the longitudinal and horizontal direction of the fibrous layered body.

Therefore, when such a fibrous layered body is used as a heat-insulating band, a step of changing the fiber direction to the thickness direction of the heat-insulating band is required. Conventionally, for example, a continuously manufactured fiber layered body is cut into strips to form a large number of cut pieces of the same width, and after these cut pieces are transferred to another table, the direction of the fibers is determined. A large number of cut pieces were placed side by side on a table in the vertical direction, and their upper surfaces were covered with a protective sheet using an adhesive or the like, and each cut piece was formed as a continuous plate-shaped heat-insulating zone.

However, in the conventional manufacturing method of such a heat insulation zone, there are many steps such as transporting the cut pieces of the fiber layered body, changing the fiber direction of the cut pieces and arranging them, and further 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. The present invention has been made based on the above-mentioned viewpoints, and it is possible to automatically transfer cut pieces of a fiber layered body, change the fiber direction, and bond the protective sheet afterwards without manual intervention. The aim is to simplify the manufacturing process, improve work efficiency, and lower manufacturing costs.

That is, the present invention cuts a fiber layered material transported on a conveying means into strips, continuously supplies cut pieces of the same width, and then passes these cut pieces through a stepped portion provided on the conveying means. 900 to the front side to change the direction of the fibers to the vertical direction, press and stack the changed cut pieces in the horizontal direction, and then cover the upper and/or lower surfaces with a protective sheet via an adhesive. This is a method for manufacturing a heat-retaining zone.

Hereinafter, the present invention will be described in detail based on embodiments shown in the accompanying drawings. In the manufacturing process of the fibrous heat-retaining zone shown in FIG. 1, an inorganic fiber material 1 made from natural rocks such as basalt, blast furnace slag, glass, etc. is blown from a cotton collection chamber 2 onto a net conveyor 3 to form a layered material. At the same time, they are glued together in an entangled state with a liquid adhesive sprayed from the nozzle 4, for example, a thermosetting resin such as phenol 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).

In addition, the fiber direction of the fiber layered body 7 is mainly
They are arranged along the longitudinal and horizontal direction. The fiber layered body 7 formed in this way travels on a transfer conveyor 8 which is a first conveying means, and when passing under a cutting device 9, it is cut by a cutting device 9 whose blade descends at regular intervals. The fiber layered body 7 is cut one unit at a time in a rectangular shape in a direction perpendicular to the traveling direction of the fiber layered body 7, and is continuously formed into cut pieces 10 having the same width.

Note that the speed of the transfer conveyor 8 and the blade of the cutting device 9. The time interval during which the cut section 10 falls is strictly controlled, so that the width of each section 10 remains constant. The cut pieces 10 thus formed further advance on the transfer conveyor 8, and the cut pieces 10 are further moved on the transfer conveyor 8. When transferring onto the transfer conveyor 12, which is the second transfer means, which has a stepped portion 11 formed between the two, the feed falls forward by 90 degrees, and at the time of transfer to the transfer conveyor 12, the fiber direction changes from the previous horizontal direction. Changed vertically.

The speed of this transfer conveyor 12 is determined by the speed of the transfer conveyor 8.
For example, in FIG. 1, when the rear cut piece 10'' is transferred from the transfer conveyor 8 to the transfer conveyor 12, care is taken to avoid contact with the front cut piece 1''. In addition, the step portion 1
1 is set in response to changes in the shape of the cut piece 10, etc. For example, if the step is too large and the cut piece 10 rotates 1800 times, or if the step is too small and the cut piece 10
Care is taken to prevent the paper from sliding onto the transfer conveyor 12 without rotating. Generally, the step width is set around approximately 1'2 of the height H of the cut pieces 10 transferred onto the transfer conveyor 12, and is further determined based on various conditions, for example, the relationship with the width w of the cut pieces 10. , section 1
It is set in consideration of the position of the center of gravity of 0, the raw material of the fiber layered body, the speed of each transfer conveyor 8, 12, etc. The stepped portion 11 is not limited to the case where the transfer conveyor 12 is arranged at a lower position than the transfer conveyor 8 as in this embodiment, but the case where the transfer conveyor 12 is arranged at a higher position. In this case, a stepped portion 11 is also formed between the transfer conveyor 8 and the transfer conveyor 8. Cut piece 1 with the fiber direction changed in this way
0 travels on the transfer conveyor 12, and then transfers onto the bread conveyor 13, which is a conveying means connected at approximately the same height as the transfer conveyor 12.The speed of this bread conveyor 13 is about the same as that of the transfer conveyor 8. In other words, the speed is adjusted to be slightly slower than the speed of the transfer conveyor 12, and the cut pieces 1 that are transferred one after another onto the pan conveyor 13 are
0 comrades can be stacked in pressure contact with each other in the horizontal direction.
The stack of cut pieces 14 pressed against each other in the horizontal direction is transported with the top surfaces held at approximately the same height by the horizontal bottom surface of the pan conveyor 13, and is transported below the adhesive application device 15. When passing, the hot melt adhesive, which has been heated and melted to a predetermined temperature in the device 15, is sprayed from the spray gun 16 to form a hot melt coating layer on the upper surface of the aggregate 14.

Following this adhesive application process, the protective sheet 18 supplied from the sheet roll 17 is adhered to the pressure roller 19 while covering the upper surface of the assembly 14 via the adhesive application layer, and the protective sheet 18 is adhered to cover the upper surface of the assembly 14 through the adhesive application layer. A heat-retaining material 20 in which a covering layer is continuously formed can be obtained. Although the above example describes a method of spraying hot melt adhesive, other polymer adhesives or inorganic adhesives may be used, and a roll coater method may be used instead of spraying. Good too. The continuously supplied heat insulating material 20 is transferred by a feed conveyor 21, cut on both sides, and then sawed into a predetermined size by a finishing cutter 22 to obtain a plate-shaped heat insulating band 23. As the protective sheet 18, materials such as glass cloth, glass fiber non-woven fabric, cheesecloth, kraft paper, aluminum kraft paper, etc. are used, and the protective sheet 18 is applied not only to the top surface but also to the top and bottom surfaces as necessary. It can also be coated. Second
5 to 5 show various embodiments in which the fiber direction of the cut piece 10 is changed at the stepped portion 11.

FIG. 2 shows an embodiment in which the cut pieces 10 transferred from the transfer conveyor 8 onto the transfer conveyor 12 have a vertically elongated shape. By supporting the sides of the cut pieces 10 with the transfer conveyor 8 when the lower ends of the cut pieces 10 come into contact with each other, the cut pieces 10 are
can stand on its own on the transfer conveyor 12. 3 and 4 show an embodiment in which the cut pieces 10 transferred from the transfer conveyor 8 onto the transfer conveyor 12 have a horizontally elongated shape. A stepped portion 11 is provided with the fibers slightly lower than the top surface of the transfer conveyor 8, and the cut pieces 10 sent from the transfer conveyor 8 are dropped directly onto the transfer conveyor 12, thereby changing the fiber direction. In the latter case, the transfer conveyor 12 is set at a higher position than the transfer conveyor 8, and the step portion 11 is provided, and the cut pieces 10 are pushed up onto the transfer conveyor 12.
The cut piece 10 is transferred onto 2. Further, FIG. 5 shows an example in which the cut pieces 10 transferred onto the transfer conveyor 12 cannot stand on their own, and in this case, the speed of the transfer conveyor 12 is adjusted to be slow, and the cut pieces 10 are transferred onto the transfer conveyor 12. The immediately following cut piece leans on the cut piece that was transferred earlier as a support, thereby maintaining its independence. As explained above, according to the method for manufacturing a fibrous heat-insulating belt according to the present invention, a heat-insulating belt in which the fiber direction is perpendicular to the plane part can be continuously and easily manufactured, which improves production efficiency. In addition to making improvements, we were also able to reduce manufacturing costs.

In addition, the means for changing the fiber direction of the cut pieces can be easily and reliably changed by means of the stepped portion provided on the conveyor, so the manufacturing equipment can be installed easily and inexpensively, and maintenance etc. can also be done easily. It has the effect that it can be used.

[Brief explanation of the drawing]

FIG. 1 is a manufacturing process diagram showing one embodiment of the means for manufacturing a fibrous heat-retaining belt according to the present invention, and FIGS. 2 to 5 are explanatory diagrams showing various examples of transition states of cut pieces at a stepped portion. be. 3... Net conveyor, 7... Fibrous layered body, 8... Transfer conveyor, 10... Cut piece, 11... Step portion, 12 ...Transfer conveyor, 13...Bread conveyor, 18...
・Protection sheet.

Claims (1)

[Claims] 1 Cut the fiber layered material transported on the conveying means into strips to continuously form cut pieces of the same width, and cut these cut pieces to the side in the traveling direction by a stepped portion provided on the conveying means. Tilt it 90 degrees to change the fiber direction to vertical direction,
A method for manufacturing a fibrous heat-retaining belt, which comprises pressing and stacking the modified cut pieces in a horizontal direction, and then covering the upper and/or lower surfaces with a protective sheet via an adhesive.