JP4415392B2 - Insulation manufacturing method - Google Patents

Description

The present invention relates to a process for producing a cross-sectional heated material that put the dressing body accommodating a core in the package.

  In recent years, consumer electronics products such as refrigerators and cooking appliances are required to save energy. In order to meet such demands, high-performance vacuum insulation is used inside the main body of home appliances.

  As disclosed in, for example, Patent Document 1, the vacuum heat insulating material includes glass wool serving as a core material and an outer casing that wraps the glass wool in a vacuum state. The outer covering here may be any material as long as it has gas barrier properties and can accommodate the core material and maintain the inside in a vacuum, but preferably a plastic film having a metal such as aluminum deposited on its surface. A laminated bag such as is used.

On the other hand, glass wool used as a core material has a small bulk specific gravity (density) and cannot be accommodated in the bag-like outer casing at the time of manufacture in the state as it is, or finally a plate-like heat insulating material is obtained. I can't. In order to cope with such a problem, the applicant of the present application has proposed a shaped body of a heat insulating material that holds a core material in a compressed state accommodated in a sheet material in Patent Document 2. With such a shaped body, it is not necessary to apply a binder to the core material or perform a baking treatment, and a shaped body having a stable fixed shape can be obtained in a short time.
JP 2003-269689 A JP 2005-207556 A

  By the way, when insulating a cylinder or other shaped object, for example, a single vacuum heat insulating material is bent into a cylindrical shape to insulate it. At that time, there is a problem that heat leaks from the butt portion of the heat insulating material and the heat insulating effect is reduced.

Then, in view of the said problem, this invention aims at providing the manufacturing method of the heat insulating material which can reduce the heat leak from a butt | matching part.

In the manufacturing method of the heat insulating material according to claim 1 of the present invention, when used in rounding insulation, it is possible to end to end easily superimpose, insulation to prevent drop of heat insulating performance in the butt portion Can be manufactured .

In addition, since the package contains the core material and holds it in a predetermined state, there is no need to apply a binder to the core material or to perform a baking process, and the heat insulating material has a fixed shape that makes the core material stable in a short time. Can be retained. In addition, nothing is added to the core material itself including the binder, and the excellent heat insulation performance as the core material alone can be maintained as it is .

And in the manufacturing method of the heat insulating material, in the same process as the outer periphery cutting which determines the external shape of a core material, a step part can be formed by putting a cutting blade, and reduction of a work process can be aimed at.

According to claim 1 of the present invention, it is possible to provide a thermal insulation material capable of reducing the leakage from the butted portion. Further, the core material can be held in a stable and fixed shape in a short time, and the heat insulating performance as a core material alone can be maintained as it is .

Furthermore, by forming the step portion in the same process as the outer periphery cutting of the core material, the work process can be reduced.

Hereinafter, preferred embodiments of a method for producing a heat insulating material according to the present invention will be described with reference to the accompanying drawings.

  First, the structure in the completion state of a heat insulating material is demonstrated based on FIG. In the figure, reference numeral 1 denotes a flat vacuum heat insulating material disposed in, for example, a refrigerator or a cooking appliance, which includes a core material 2 made of a heat insulating material in which fibrous glass wool rich in elasticity is laminated, and the core material 2 The inner pack 3 is a sheet material for storing the core material 2, and the core material 2 and the inner pack 3 are configured by a barrier material 4 as an envelope body that wraps in a vacuum state. The core material 2 here does not contain an inorganic binder or an organic binder as in the prior art, and is composed of glass wool alone. The barrier material 4 before vacuum sealing is formed in a bag shape having only one side opened, and a shaped body 5 in which the core material 2 is stored in a compressed state in the inner pack 3 from this opening (not shown). (See FIG. 7) is inserted and sealed. This barrier material 4 may be any material as long as it has a gas barrier property and can accommodate the core material 2 and the inner pack 3 and maintain the inside in a vacuum. For example, a plastic in which a metal such as aluminum is deposited on the surface A laminated bag such as a film is used.

  Next, the manufacturing process of the said vacuum heat insulating material 1 is demonstrated, referring also FIGS. FIG. 2 is a cross-sectional view showing a state in which the outer periphery of the core material 2 is cut. In the cutting process of the core material 2 which is the first process, the core material 2 is adjusted to a predetermined size so that the outer shape of the core material 2 becomes, for example, a rectangular shape by a blade as a cutting means provided in a mold (not shown). Cut. At that time, both ends of the core material 2 (butting portions) are alternately turned upside down by blades (cutting blades) as cutting means provided in advance in the mold, to a part of the core material 2 in the middle of the thickness direction, Make cuts across the front and back. Reference numeral 11 in FIG. 2 denotes a cut portion formed in the core material 2 by the cutting blade.

  When the cutting process of the core material 2 is completed, a drying process of the core material 2 is performed thereafter. Next, as shown in FIG. 3, a part of the core material 2 separated by the cut portion 11 (the separation part 12 is separated). , 12) is removed from the core material 2 and thinned. Thereby, level difference parts 14 and 14 are formed on both end faces of core material 2 from which cut parts 12 and 12 are removed, respectively. In addition, the said drying process is performed in order to remove the water | moisture content adhering to a core material, and to remove a deposit | attachment in the case of the vacuum drawing mentioned later.

  As a method of forming the stepped portions 14 and 14 on both end faces of the core material 2, for example, it is conceivable to slide one of two pieces of glass wool and provide a step on the end face. Of course, it is good also as a core material 2 by laminating | stacking 3 or more glass wool, shifting.

  FIG. 4 shows a state in which the core material 2 before compression is wrapped with the inner pack 3. The inner pack 3 as a package surrounding the core material 2 is a material that can maintain sealing performance, heat resistance, and durability (hardness to cut) in each manufacturing process until the shaped body 5 described later is inserted into the barrier material 4. Is selected. Specifically, it is preferable to select a polypropylene resin or a polyethylene resin that satisfies these requirements as the material of the inner pack 3. Further, the thickness of the inner pack 3 is the workability when the inner pack 3 is subsequently formed into a bag shape, the workability when the inside of the inner pack 3 is vacuum-depressed, and the opening of the inner pack 3 is sealed, etc. In consideration of the above, a thickness of 0.05 mm or less is preferable.

  First, in the step of covering the core material 2 with the inner pack 3, the core material 2 is placed on one side portion 3A of the inner pack 3 that is cut into a predetermined size, and the intermediate portion 3B is placed as shown in FIG. Folded so that the one side 3A and the other side 3C of the inner pack 3 are opposed to each other with the core material 2 interposed therebetween.

  Next, a step of forming the inner pack 3 into a bag shape is performed. Here, after compressing the core material 2 with a press or the like (not shown), the one side portion 3A of the inner pack 3 and the ear portions 3D on the left and right sides of the other side portion 3C are overlapped (FIG. 5), What is necessary is just to seal the ear | edge part 3D formed in 3 A of 1 side 3 and the other side part 3C by heat sealing (FIG. 6). In FIG. 6, the ear portions 3 </ b> D on the left and right sides of the inner pack 3 are sealed, and the inner pack 3 is formed in a bag shape having only one front side opened. In addition, the inner pack 3 may be a bag shape in which only one side is opened in advance.

  From the state of FIG. 5, the ear 3 </ b> D on the left side of the inner pack 3 and another ear 3 </ b> D on the front side are sealed (in this case, an opening is formed on the right side of the inner pack 3. Or the ear 3D on the right side of the inner pack 3 and another ear 3D on the front side are sealed (in this case, an opening is formed on the left side of the inner pack 3). Good. Further, the reason for sealing the ear portion 3D while compressing the core material 2 is that, in the state of the core material 2 before compression, depending on the thickness of the core material 2, the one side portion 3A and the other side portion 3C of the inner pack 3 This is because it is difficult to overlap each ear 3D.

  Next, the process proceeds to a step of forming the core material 2 into a shaped body. Here, after compressing the core material 2 to a fixed shape using the above-mentioned press machine, the opening left to vacuum-depress the inside of the inner pack 3 is heat-sealed immediately after the pressure reduction, so that the compression is achieved. A shaped body 5 in which the core material 2 that maintains the state is housed in the inner pack 3 can be obtained. The opening can be easily sealed by sealing the ear portions 3D on the front sides of the one side portion 3A and the other side portion 3C of the inner pack 3 in the same manner as described above. As shown in FIG. 7, when all the opening end portions of the inner pack 3 are sealed, the core material 2 housed in the inner pack 3 is held in a stable compressed state. The body 5 has dimensions of, for example, 1400 mm, 480 mm, and 12.5 to 1 mm, respectively, so that the body 5 can be easily accommodated in the bag-like barrier material 4. In addition, the number here is an example to the last, and the shaping body 5 other than the said dimension can also be manufactured.

  In this embodiment, the opening end of the inner pack 3 other than the vacuum decompression opening is sealed before the core material 2 is compressed into a fixed shape, but the state shown in FIG. After compressing the core material 2 to a fixed shape, all the open end portions of the inner pack 3 may be sealed in order or at a time to obtain a desired shaped body 5.

  As described above, in a series of manufacturing steps until the shaped body 5 is obtained, in order to maintain the shape of the compressed core material 2, a binder is applied to the core material 2 or the compressed core material 2 is left for a predetermined time. There is no need to fire. That is, in this embodiment, after the core material 2 is covered with the inner pack 3, the core material 2 is compressed, the inside of the inner pack 3 is vacuum depressurized, the opening end of the inner pack 3 is sealed, and the inner pack 3 By simply storing and holding the core material 2 in a compressed state, the shaped body 5 having a stable shape can be obtained in a very short time. Further, in addition to the press machine for compressing the core material 2, only the equipment for sealing the opening end portion of the inner pack 3 may be used, and the productivity can be remarkably improved. No energy loss due to heat occurs. In addition, nothing is added to the core material 2 alone, and the extremely excellent heat insulation performance of the glass wool alone can be maintained as it is simply by covering the periphery with the inner pack 3.

  The shaped body 5 thus obtained is inserted into the bag-shaped barrier material 4 having gas barrier properties from the opening end (not shown) in the manufacturing process of the vacuum heat insulating material 1 as the next heat insulating material, and then the vacuum chamber The vacuum heat insulating material 1 shown in FIG. 1 is formed by being vacuum-evacuated and heat-sealing and sealing the opening end of the barrier material 4. In addition, in order to make it easy to insert the shaping body 5 into the barrier material 4, the ear portion 3 </ b> D of the inner pack 3 outside the core material 2 may be folded back. Moreover, since the function as the inner pack 3 becomes unnecessary after the shaping body 5 is inserted into the barrier material 4, the end portion of the inner pack 3 may be cut and discarded. In this case, the core material 2 temporarily expands and recovers inside the barrier material 4, but the core material 2 is compressed again by the subsequent vacuuming, so that the desired vacuum heat insulating material 1 can be finally obtained. it can.

  FIG. 8 shows the completed vacuum heat insulating material 1. In the same figure, 4A is the sealing part by the heat seal formed in the opening edge part of the barrier material 4 after inserting the said shaping body 5 in the barrier material 4. FIG. The vacuum heat insulating material 1 bent into a cylindrical shape is shown in FIG. 9, and both end portions that become the butting portions of the vacuum heat insulating material 1 are overlapped to form a cylindrical shape. In the figure, a cylinder with a total circumference of about 630 mm and a diameter of 200 mm is used, and the size of the stepped portions 14 and 14 is set to 5 to 10 mm (about 1% of the total circumference). In the said butt | matching part, the thickness of the vacuum heat insulating material 1 can be made uniform over the perimeter by mutually aligning the level | step-difference parts 14 and 14 formed in the both ends of the core material 2 and making it flush | planar. That is, the stepped portions 14 and 14 can be overlapped to reduce heat leakage at the butted portion.

  As described above, the present embodiment includes the core material 2 made of a heat insulator, the inner pack 3 as a package capable of storing and holding the core material 2 in a compressed state, and the barrier material 4 as an outer cover. It is a heat insulating material, and the core material 2 is formed by superposing a plurality of heat insulators, and the core material 2 is shifted to form a stepped portion 14 on an end surface thereof.

  Further, in this embodiment, the core material 2 is composed of a heat insulator, an inner pack 3 as a packaging body capable of storing and holding the core material 2 in a compressed state, and a barrier material 4 as an outer cover body. A stepped portion 14 is formed by removing a part of the end face of the material 2.

  If it does in this way, when rounding and using a heat insulating material, an edge part and an edge part can be piled up easily, and the fall of the heat insulation performance in a butt part can be prevented.

  Further, since the inner pack 3 accommodates the core material 2 and holds it in a compressed state, there is no need to apply a binder to the core material 2 or to perform a baking process, and the core material 2 can be formed in a stable shape in a short time. Can be retained. Moreover, nothing is added to the core material 2 itself including the binder, and the extremely excellent heat insulating performance as the core material 2 itself can be maintained as it is. As described above, it is possible to provide a heat insulating material capable of reducing heat leakage from the butt portion. Further, the core material 2 can be held in a stable and fixed shape in a short time, and the heat insulating performance as the core material 2 alone can be maintained as it is.

  Further, in this embodiment, the core material 2 is formed by overlapping a plurality of heat insulators so that the stepped portion 14 is formed on the end surface, and the core material 2 is inserted into the barrier material 4 as the outer cover body. It is characterized by vacuum sealing.

  In this way, the stepped portion 14 can be formed on the end face of the core material 2 only by combining the heat insulators without cutting or the like, and is provided in a mold used for the outer periphery cutting that determines the outer shape of the core material. The cutting edge can be simplified and the cost can be reduced. Therefore, the cost can be reduced by forming a step on the end face of the core material only by combining the heat insulators.

Furthermore, in the present embodiment , cutting blades are alternately inserted into the both ends of the core material 2 made of a heat insulator in a predetermined size, and after the drying process of the core material 2, the portion of the cutting blade The step portion 14 is formed on the end face, the core material 2 is stored in a compressed state in an inner pack 3 as a packaging body that can be stored and held in a compressed state, and the barrier material 4 as an outer cover body It is vacuum sealed by inserting the inner pack 3.

  If it does in this way, in the same process as the perimeter cut which determines the external shape of core material 2, a cutting edge can be put and step part 14 can be formed, and reduction of an operation process can be aimed at. Therefore, by forming the stepped portion 14 in the same process as the outer peripheral cutting of the core material 2, the work process can be reduced.

  In addition, this invention is not limited to the said Example, It can change in the range which does not deviate from the meaning of this invention. For example, the vacuum heat insulating material as the heat insulating material in the present embodiment can be applied to any product. Further, instead of the inner pack as the sheet material in the embodiment, a bag-like package having only one side opened in advance may be used.

It is a longitudinal cross-sectional view of the vacuum heat insulating material in the preferable Example of this invention. It is a front view of the state which cut the outer periphery of the core material same as the above. It is a perspective view of the state which removed the separation part which is a part of core material from the core material same as the above. It is a perspective view which shows the state which covered the circumference | surroundings of the core material before compression same as the above with the inner pack. It is a longitudinal cross-sectional view of the state which piled up the ear | edge part, compressing a core material same as the above. It is a longitudinal cross-sectional view of the state which formed the seal part in the ear | edge part, compressing a core material same as the above. It is a longitudinal cross-sectional view of the shaping body which shows the state after compressing a core material same as the above. It is a perspective view which shows the completion state of a vacuum heat insulating material same as the above. It is a perspective view which shows one example of use of a vacuum heat insulating material same as the above.

1 Vacuum insulation (insulation)
2 Core 3 Inner pack (packaging body)
4 Barrier material (cover)
14 steps

Claims (1)

The core material at a predetermined process, previously put alternately cutting sides at both ends, after the drying step completion of the core material, to form a stepped portion Remove the portions of said cutting edge, said core member housed in the packaging body in a compressed state, the manufacturing method of the heat insulating material, which comprises vacuum-sealed by inserting the package in the envelope body.

Images