JPH08290500A - Heat insulating and sound absorbing material and its manufacture - Google Patents

Abstract

PURPOSE: To provide a heat insulating sound absorbing material and its manufacturing method in which the number of compressions can be reduced to improve the recovery rate of thickness, increase the compressed density to improve the carrying efficiency and easily carry out the automation of a packaging process. CONSTITUTION: A plurality of inorganic fiber mats 11 are carried at given intervals in one line, two lines or more, and the surfaces and rear faces of the inorganic mats 11 are covered by supplying surface covering materials 14 in a manner of clamping the mats, and the upper and lower surface covering materials 14 are welded in a manner of encircling the peripheries of respective inorganic fiber mats 11 in the state of compressing the inorganic fiber mats 11, and simultaneously a perforation is formed between adjoining welding sections of the surface covering materials 14, and the surface covering materials are wound into a roll shape to manufacture a heat insulating and sound absorbing material 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat insulating and sound absorbing material in which an inorganic fiber mat is coated with a surface covering material and a method for producing the same.

[0002]

2. Description of the Related Art Inorganic fiber mats are useful as heat insulating and sound absorbing materials, but if they are left as they are, inorganic short fibers easily become dust and scatter, and the operator is apt to feel a discomfort due to a tingling sensation and easily deteriorates. In order to solve the above problem and to have a moisture-proof property, many of them are covered with a surface covering material.

Conventionally, such an adiabatic sound absorbing material covers the front and back surfaces of an inorganic fiber mat with two front and back materials made of, for example, a synthetic resin film, and welds the periphery of the inorganic fiber mat while it is in a compressed state. The outer periphery of the welded portion is cut off to make a product one by one, and a plurality of these products are stacked and covered with an outer bag to be packaged.

[0004]

However, in the case of packaging as described above, in order to improve transportation efficiency,
Although it is common to use a compressed state during packaging to increase the density per packaging unit, even if it is compressed when welding the periphery of the surface covering material, the thickness of the inorganic fiber mat is restored before the packaging process. I had to compress it again when packing it. Due to the double compression, the thickness recovery rate of the inorganic fiber mat becomes low, a predetermined product thickness cannot be obtained, and the adiabatic sound absorbing effect is deteriorated.

Therefore, in order to maintain a predetermined product thickness, the compressed density at the time of packaging cannot be increased so much that the density in the packaged state becomes low and the transport efficiency becomes low. .

Further, when a plurality of sheets are stacked and compressed and packed, not only the front and back materials are slippery and difficult to hold, but also it is difficult to maintain the stacked state, and thus it is difficult to automatically pack them by a packing machine or the like. There was also the problem of being.

The present invention has been made in view of the above problems, and an object of the present invention is to reduce the number of times of compression to improve the thickness restoration rate, to improve the compression density and to improve the transportation efficiency. (EN) Provided is a heat-insulating sound-absorbing material which can be manufactured easily and automates the packaging process, and a manufacturing method thereof.

[0008]

In order to achieve the above object, the heat insulating and sound absorbing material of the present invention is such that a plurality of inorganic fiber mats are arranged in a row or in a width direction between two superposed surface covering materials. It is arranged in rows or more and arranged side by side at a predetermined interval in the length direction, the two surface covering materials are welded so as to individually surround the periphery of the inorganic fiber mat, and further adjacent to the surface covering material. Perforations are provided between the welded portion and the welded portion that allow the front cover material to be separated, and in a state where the inorganic fiber mat is compressed, the whole is wound in a roll shape in the longitudinal direction. It is characterized by being

Further, according to the method for producing a heat insulating and sound absorbing material of the present invention, a plurality of inorganic fiber mats are conveyed in one row or in two or more rows at a predetermined interval, and the surface covering materials are placed from above and below so as to sandwich the inorganic mats. The front and back surfaces of the inorganic fiber mat are supplied to cover the front and back surfaces of the inorganic fiber mat, and the upper and lower front cover materials are welded so as to individually surround the periphery of the inorganic fiber mat while the inorganic fiber mat is compressed. A perforation is provided between the adjacent welded portions and the welded portion, and the inorganic fiber mat is wound into a roll while maintaining the compressed state.

[0010]

According to the present invention, a plurality of inorganic fiber mats are arranged in one or two or more rows in the width direction and at predetermined intervals in the length direction between two superposed covering materials. The front cover material is arranged so as to individually surround these inorganic fiber mats, and a perforation is provided between the adjacent welded portions of the front cover material so that the front cover material can be separated. Therefore, at the time of use, the heat-insulating sound-absorbing material wound into a roll can be pulled out little by little from the end on the outer peripheral side and separated at the perforations to make individual heat-insulating sound-absorbing materials. it can.

Further, the inorganic fiber mat is compressed when the surface covering material is welded. By winding the inorganic fiber mat into a roll while maintaining the compressed state, the compression step is performed only once, and the mat is pulled out from the roll. It is possible to improve the restoration rate of the thickness of the inorganic fiber mat when it is individually separated. Further, since the restoration rate is improved, the compression density can be increased to improve the transportation efficiency and the storage space can be reduced. Therefore, transportation costs, storage costs, and the like are also low.

More specifically, the compression density of the conventional similar heat insulating and sound absorbing material in packaging is 20 to 50 kg / m ³ , but according to the heat insulating and sound absorbing material of the present invention, it is 40 to 60 kg / m. It can be set to ³ , and the restoration rate when unpacked can be increased by 5 to 10% as compared with the conventional adiabatic sound absorbing material. Here, the compressed density refers to the weight per unit volume of the heat insulating and sound absorbing material that is compressed and packaged.

Further, since a plurality of heat insulating sound absorbing materials arranged continuously through the perforations are wound into a roll in a compressed state, they can be packaged as they are, and automation of the compression packaging process is facilitated. The manufacturing cost can be reduced.

Since a plurality of heat-insulating sound-absorbing materials can be separated through perforations and are stored in a rolled state in a compressed state, only a required number of sheets need to be separated before use. Therefore, it is easy to handle, the working space is small, and the remaining portion can be stored in a roll shape without re-piling.

[0015]

1 to 4 show an example of an apparatus for producing the heat insulating and sound absorbing material of the present invention. 1 is a plan view of the same manufacturing apparatus, FIG. 2 is a side view of the same manufacturing apparatus, and FIG. 3 shows a portion in which the lengthwise welding portion and the lengthwise perforation are provided. FIG. 4 is a partially enlarged view showing, in the manufacturing apparatus, a portion where a welding portion in the width direction and a perforation in the width direction are provided.

In FIGS. 1 and 2, reference numeral 12 is a conveyer conveyor for the inorganic fiber mat 11. This conveyor 12
The upper and lower parts of the front cover are provided with front cover rolls 13 and 13 so that the upper and lower surfaces of the inorganic fiber mat 11 are covered with the front cover roll 14 drawn from them.

A rotary type longitudinal heat sealer 15 and a rotary type longitudinal perforated cutter 16 are also provided in front of the front material rolls 13 and 13 so as to abut against the upper surface material 14. Are supported by the rotary shaft 17 and arranged. In this case, the lengthwise heat sealers 15 are arranged on both sides of each inorganic fiber mat 11, and as shown in FIG. 3, the lengthwise perforated cutter 16 is located between the two heat sealers 15 arranged at the center. It is located in.

In order to receive the lengthwise heat sealer 15 and the lengthwise perforated cutter 16 from below,
The first receiving roller 18 is arranged in contact with the front surface material 14 on the lower surface. For this reason, the upper and lower front cover materials 14 have the longitudinal heat sealer 15 and the longitudinal perforated cutter 16 respectively.
Then, the first receiving roller 18 sandwiches it. Then, the rotating shaft 17 supporting the lengthwise heat sealer 15 and the lengthwise perforated cutter 16 and the first receiving roller 18 rotate as indicated by arrows a and b in FIG.

Further in front of the transport direction of the inorganic fiber mat 11, the inorganic fiber mat 11 covered with the surface covering material 14 is provided.
The first compression conveyors 21, 21 are arranged vertically so as to sandwich and compress the above.

In front of the outlets of the first compression conveyors 21, 21, a pressing plate 24 for supporting a blade type widthwise heat sealer 22 and a blade type widthwise perforated cutter 23 is arranged above, and these are installed. The 2nd receiving roller 25 is arrange | positioned below so that it may receive. Pressing plate 2
4 is moved up and down by a drive mechanism (not shown).

Further, adjacent to the pressing plate 24 and the second receiving roller 25, in front of the transport direction of the inorganic fiber mat 11, the inorganic fiber mat 11 covered with the surface covering material 14 is provided.
The second compression conveyors 26, 26 are arranged vertically so as to sandwich and compress the above.

A winding shaft 28, which is rotated by a drive mechanism (not shown), is disposed in front of the outlets of the second compression conveyors 26, 26, and the inorganic fiber mat 11 covered with the surface covering material 14 has the above-mentioned structure. It is adapted to be wound around the winding shaft 28.

Next, an embodiment of a method of manufacturing the heat insulating and sound absorbing material according to the present invention using the above manufacturing apparatus will be described.

In this embodiment, the inorganic fiber mat 11
Is cut into a rectangular shape of a predetermined size, and
They form a line, are lined up at predetermined intervals in the length direction, and are placed on the conveyor 12 and moved.

The front material rolls 1 are arranged above and below the exit of the conveyor 12 so as to sandwich the inorganic mat 11 therebetween.
Surface covering materials 14, 14 are supplied from 3, 13 to cover the upper and lower surfaces of the inorganic fiber mat 11.

Next, the front covering materials 14 and 14 are provided with a longitudinal heat sealer 15 and a longitudinal perforated cutter 16 arranged above, and a first receiving roller 18 arranged below.
Sandwiched between.

The lengthwise heat sealers 15 are arranged on both outer sides of the respective inorganic fiber mats 11, and the upper and lower surface covering materials 14, 14 are welded in the longitudinal direction on both side portions of the respective inorganic fiber mats 11.

Further, as shown in FIG. 3, between the two rows of the inorganic fiber mats 11, 11, a lengthwise perforated cutter 16 is disposed between the two lengthwise heat sealers 15. Thus, perforations are provided between the adjacent welded portions between the surface covering materials 14, 14.

After that, the inorganic fiber mat 11 whose upper and lower surfaces are covered with the surface covering materials 14, 14 is the first upper and lower layers.
It is sandwiched between the compression conveyors 21 and 21 and compressed to a predetermined thickness.

A pressing plate 24 for supporting the widthwise heat sealer 22 and the widthwise perforated cutter 23 is arranged in front of the outlets of the first compression conveyors 21, 21. The pressing plate 24 is shown in FIG. When the portion between the inorganic fiber mats 11 that are transported at a predetermined interval comes as shown in FIG. 5, the part descends as shown by the arrow C, and the width direction heat sealer 22 and the width direction perforated cutter 23 are received by the second receiver. Press on the roller 25.

As a result, the upper and lower surface covering materials 14, 14 are welded at the portions located at the ends in the lengthwise direction of the inorganic fiber mat 11, and perforations are formed between the welded portions. It is provided.

After that, the inorganic fiber mat 11 covered with the surface covering materials 14 and 14 was sandwiched again between the second compression conveyors 26 and 26 arranged above and below to maintain the compressed state. It is conveyed as it is, and finally is wound into a roll on the winding shaft 28.

When the roll of the heat insulating sound absorbing material 31 thus obtained has a predetermined diameter, the surface covering material is separated at the perforation portion at an appropriate position in the longitudinal direction, and the heat insulating sound absorbing material is separated from the winding shaft 28. The roll 31 is taken out, and the front end of the remaining adiabatic sound absorbing material 31 which has not yet been rolled is wound around the winding shaft 28 again to restart the winding.

FIG. 5 is a partial side sectional view showing a state before the heat insulating sound absorbing material is wound into a roll in the above embodiment, and FIG. 6 is a view showing that the heat insulating sound absorbing material is wound into a roll in the above embodiment. It is a partial top view which shows the state before taking.

As described above, in the heat insulating sound absorbing material 31, the upper and lower surfaces of the inorganic fiber mat 11 are covered with the surface covering material 14, and the welded portion 19a formed in the length direction and the welded portion formed in the width direction. By the portion 19b, the individual inorganic fiber mat 1
The upper and lower front covering materials 14 are welded so as to surround the circumference of 1.

In addition, between the two rows of the inorganic fiber mats 11 arranged in the width direction, the welded portions 19 formed in the length direction.
A perforation 20a running in the length direction is provided between a and 19a. Similarly, the welded portion 1 formed in the width direction
A perforation 20b running in the width direction is provided between 9b and 19b.

Therefore, the sound absorbing and heat insulating material 31 is broken by breaking the front covering material at the perforations 20a and 20b.
It is possible to separate one inorganic fiber mat 11 into the one covered with the surface covering material 14. Such work can be easily performed on site while pulling out the sound absorbing heat insulating material 31 wound in a roll form from the end portion of the outer periphery, so that it is possible to carry in and carry out the inorganic fiber mat at the site, and further store the remaining material. It will be easier and workability will be improved.

In the present invention, the inorganic fiber mat 1
A mat made of glass wool, rock wool or the like is preferably used as 1, and its density is preferably 8 to 32 kg / m ³ .

As the surface covering material 14, it is preferable to use a film that can be heat-welded at least on the inner surface, and for example, a synthetic resin film of polyethylene, vinyl chloride, polypropylene or the like is used. The front cover material 14 is
The conventional heat insulating and sound absorbing material may be subjected to the same treatment as that applied to the surface covering material, for example, a metal foil or the like may be vapor-deposited, and a large number of pores may be provided. The thickness of the surface covering material 14 is preferably 10 to 200 μm.

Although the inorganic fiber mats 11 are arranged in two rows in the width direction in the above embodiment, they may be arranged in one row, or in three or more rows.

Further, it is preferable that the perforations have such a strength that they can withstand the tension when wound into a roll and can be easily separated by hand, and the pitch is determined according to the material and thickness of the front covering material 14. Preferably.

Experimental Example A glass wool mat having an average fiber diameter of 8 μm produced by a centrifugal method was added with a phenol resin binder and heat-cured in an oven, and a glass wool mat having a density of 10 kg / m ³ was used as an inorganic fiber mat. Using the polyethylene film as the surface covering material, a heat-insulating sound-absorbing material wound into a roll by the above method was produced and covered with an outer bag and packaged.
This is an example product.

Further, using the same glass wool mat and polyethylene film as those used in the examples, a heat insulating and sound absorbing material was manufactured by a conventional method, 10 sheets were stacked and compressed, and an outer bag was covered and packaged. . This is a comparative example product.

The compressed density was calculated from the volume and weight in the packaged state for the example product and the comparative example product. Further, after 24 hours of unpacking, the thickness of the heat insulating and sound absorbing material was measured by the method of JIS A 9521, and the restoration ratio was calculated from the relationship with the thickness of the inorganic fiber mat before being covered with the surface covering material. Table 1 shows the results.

[0045]

[Table 1]

From the results in Table 1, it can be seen that the restoration rate of the example product is 6% higher than that of the comparative product, although the compression density is about 1.7 times that of the comparative product.

Further, the heat insulating and sound absorbing material of the embodiment example could be used by manually separating the required number of sheets by hand.

[0048]

As described above, according to the present invention,
The number of times of compression of the heat insulating sound absorbing material can be reduced to improve the thickness restoration rate, the compression density can be increased to improve the transportation efficiency, and the packaging process can be easily automated. Further, upon use, the required number of sheets can be separated and used, the handling is easy, and the remaining portion can be stored easily. Therefore, manufacturing costs, transportation costs, storage costs, and the like can be reduced, which is economically advantageous.

[Brief description of drawings]

FIG. 1 is a plan view showing an example of a manufacturing apparatus for manufacturing a heat insulating and sound absorbing material of the present invention.

FIG. 2 is a side view of the manufacturing apparatus.

FIG. 3 is a partially enlarged view showing a welded portion in a length direction and a portion in which a perforation in the length direction is provided in the manufacturing apparatus.

FIG. 4 is a partially enlarged view showing a portion where a welding portion in the width direction and a perforation in the width direction are provided in the manufacturing apparatus.

FIG. 5 is a partial side sectional view showing a state before the heat insulating sound absorbing material is wound into a roll in one embodiment of the present invention.

FIG. 6 is a partial plan view showing a state before the heat insulating sound absorbing material is wound into a roll in the embodiment.

[Explanation of symbols]

 11 Inorganic Fiber Mat 14 Surface Material 19a Lengthwise Welding Part 19b Widthwise Welding Part 20a Lengthwise Perforation 20b Widthwise Perforation 31 Insulation Sound Absorbing Material

Claims (2)

[Claims] 1. A plurality of inorganic fiber mats are arranged in one row or two or more rows in the width direction and at a predetermined interval in the length direction between two superposed surface covering materials, Two surface covering materials are welded so as to individually surround the periphery of the inorganic fiber mat, and further it is possible to separate the surface covering material between adjacent welded portions and welded portions of the surface covered material. A heat insulating and sound absorbing material, which is provided with perforations, and is wholly wound in a roll shape in a length direction in a state where the inorganic fiber mat is compressed. 2. A plurality of inorganic fiber mats are conveyed in one row or in two or more rows at a predetermined interval, and front and back materials are supplied from above and below so as to sandwich the inorganic mat, and the front and back surfaces of the inorganic fiber mat are conveyed. In a state of covering and compressing the inorganic fiber mat, the upper and lower surface covering materials are welded so as to individually surround the periphery of the inorganic fiber mat, and at the same time, between the adjacent welding portion and the welding portion of the surface covering material. A method for producing a heat-insulating sound-absorbing material, characterized in that a perforation is provided in the roll, and the inorganic fiber mat is wound into a roll while maintaining a compressed state.