JP4415392B2 - Insulation manufacturing method - Google Patents

Insulation manufacturing method Download PDF

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JP4415392B2
JP4415392B2 JP2006141283A JP2006141283A JP4415392B2 JP 4415392 B2 JP4415392 B2 JP 4415392B2 JP 2006141283 A JP2006141283 A JP 2006141283A JP 2006141283 A JP2006141283 A JP 2006141283A JP 4415392 B2 JP4415392 B2 JP 4415392B2
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core material
inner pack
heat insulating
vacuum
insulating material
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JP2007309478A (en
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浩太郎 川瀬
怜 丸山
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Toshiba Home Technology Corp
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本発明は、包装体に芯材を収納した整形体における断熱材の製造方法に関する。 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.

近年、冷蔵庫や調理機器などの家電製品は、消費者より省エネルギー化が求められている。そうした要求に応えるため、家電製品の本体内部には、高性能な真空断熱材が使用されている。   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.

上記真空断熱材は、例えば特許文献１などに開示されるように、芯材となるグラスウールと、このグラスウールを真空状態で包装する外被体とにより構成される。ここでの外被体は、ガスバリア性を有し、芯材を収納して内部を真空に維持できれば、どのようなものでも構わないが、好ましくは例えばアルミニウムなどの金属を表面に蒸着したプラスチックフィルムなどの積層袋が用いられる。   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.

一方、芯材として利用されるグラスウールは嵩比重（密度）が小さく、そのままの状態では製造時に上記袋状の外被体に収納することができないか、或いは最終的に板状の断熱材を得ることができない。こうした問題に対処するために、本願出願人は特許文献２において、芯材をシート材に収納した圧縮状態に保持する断熱材の整形体を提案している。このような整形体であれば、芯材にバインダーを塗布したり、焼成処理を行なう必要がなく、安定した定型形状の整形体を短時間で得ることができる。
特開２００３−２６９６８９号公報 特開２００５−２０７５５６号公報 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

ところで、円筒やその他の形状の物を断熱する際、例えば１枚の真空断熱材を円筒状に折り曲げるなどして断熱する。その際、断熱材の突合せ部からの熱のリークが生じ断熱効果が減少する問題がある。   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.

そこで本発明は上記問題点に鑑み、突合せ部からの熱のリークを減少させることが可能な断熱材の製造方法を提供することを目的とする。 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.

本発明における請求項１の断熱材の製造方法では、断熱材を丸めて使用する場合に、端部と端部とを容易に重ね合わせることができ、突合せ部における断熱性能の低下を防ぐ断熱材を製造することができる。 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 .

さらに、その断熱材は包装体が芯材を収納して所定状態に保持するので、芯材にバインダーを塗布したり、焼成処理を行なう必要が全くなく、芯材を短時間で安定した定形形状に保持できる。しかも、芯材そのものにはバインダーを含め何も添加されておらず、芯材単体としての極めて優れた断熱性能をそのまま維持できる。 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 .

そしてその断熱材の製造方法では、芯材の外形を決定する外周カットと同じ工程で、切刃を入れて段差部を形成することができ、作業工程の削減を図ることができる。 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.

本発明の請求項１によると、突合せ部からの熱のリークを減少させることが可能な断熱材を提供することができる。また、芯材を短時間で安定した定形形状に保持でき、芯材単体としての断熱性能をそのまま維持できる。 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 .

さらに芯材の外周カットと同じ工程で段差部を形成することで、作業工程の削減を図ることができる。 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.

以下、添付図面を参照しながら、本発明における断熱材の製造方法の好ましい実施例を説明する。 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.

先ず、断熱材の完成状態における構成を図１に基づき説明する。同図において、１は例えば冷蔵庫や調理機器などに配設される平板状の真空断熱材で、これは弾性に富む繊維状のグラスウールが積層した断熱体からなる芯材２と、この芯材２を収納するシート材としてのインナーパック３と、これらの芯材２およびインナーパック３を真空状態で包装する外被体としてのバリア材４とにより構成される。ここでの芯材２は、従来のような無機バインダーや有機バインダーが含まれておらず、グラスウール単体で構成される。また、真空封止前のバリア材４は、その一辺のみを開口した袋状に形成され、この開口部（図示せず）から前記インナーパック３に芯材２を圧縮状態で収納した整形体５（図７参照）が挿入封止される。このバリア材４は、ガスバリア性を有し、かつ芯材２およびインナーパック３を収納して内部を真空に維持できれば、どのような材料でも構わず、例えばアルミニウムなどの金属を表面に蒸着したプラスチックフィルムなどの積層袋が用いられる。   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.

次に、上記真空断熱材１の製造工程について、図２〜図８をも参照しながら説明する。図２は、芯材２の外周をカットした状態の断面図である。最初の工程である芯材２の切断工程では、図示しない型に設けられている切断手段としての刃によって、芯材２の外形が例えば矩形状となるように、当該芯材２を所定寸法にカットする。その際、芯材２の両端部（突合せ部）に表裏互い違いに、予め型に設けられている切断手段としての刃（切刃）によって、芯材２の一部に厚さ方向の途中まで、前後に横断した切込みを入れる。図２の符号11は、この切刃によって芯材２に形成された切込部である。   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.

上記芯材２の切断工程が終了すると、その後で芯材２の乾燥工程を行ない、次に図３に示すように、前記切込み部11によって切離された芯材２の一部（切離し部12，12）を、芯材２から取り除き薄肉化する。これにより、切離し部12，12を取り除いた芯材２の両端面に段差部14，14がそれぞれ形成される。なお、前記乾燥工程は、芯材に付着している水分を除去するためと、後述する真空引きの際に、付着物を除去するために行なわれる。   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.

芯材２の両端面に段差部14，14を形成する方法として、例えば、２枚合せのグラスウールのうち１枚をスライドさせ端面に段差を設けることも考えられる。もちろん３枚以上のグラスウールをずらしながら重ね合わせて芯材２としてもよい。   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.

図４は、圧縮前の芯材２をインナーパック３で包み込んだ状態を示している。芯材２を取り囲む包装体としてのインナーパック３は、後述する整形体５をバリア材４に挿入するまでの各製造工程で、シール性，耐熱性および耐久性（切れにくさ）を維持できる材料が選定される。具体的には、インナーパック３の材料として、これらの要求を満たすポリプロピレン樹脂またはポリエチレン樹脂を選択するのが好ましい。またインナーパック３の厚さは、その後このインナーパック３を袋状に形成する際の作業性や、インナーパック３の内部をバキューム減圧後、インナーパック３の開口部をシールする際の作業性などを考慮して、0．05ｍｍ以下のものが好ましい。   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.

先ず、インナーパック３に芯材２を覆う工程では、所定寸法に裁断されたシート状をなすインナーパック３の一側部３Ａに芯材２を載せ、図２に示すようにその中間部３Ｂを折り返して、芯材２を挟んでインナーパック３の一側部３Ａと他側部３Ｃとを対向させる。   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.

次に、インナーパック３を袋状に形成する工程が行なわれる。ここでは、芯材２を図示しないプレス機などで圧縮しながら、インナーパック３の一側部３Ａと他側部３Ｃの左右両側にある耳部３Ｄを重ね合わせた後（図５）、インナーパック３の一側部３Ａと他側部３Ｃに形成される耳部３Ｄどうしをヒートシールにより封止すればよい（図６）。この図６では、インナーパック３の左右両側にある耳部３Ｄを封止し、インナーパック３は前側の一辺のみが開口した袋状に形成される。なお、インナーパック３は予め一辺のみを開放した袋状のものでも良い。   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.

なお、図５の状態から、インナーパック３の左側にある耳部３Ｄと、前側にある別な耳部３Ｄとを封止（この場合は、インナーパック３の右側に開口部が形成される。）したり、インナーパック３の右側にある耳部３Ｄと、前側にある別な耳部３Ｄとを封止（この場合は、インナーパック３の左側に開口部が形成される。）してもよい。また、芯材２を圧縮しながら耳部３Ｄを封止する理由は、圧縮前の芯材２の状態では、芯材２の厚みによって、インナーパック３の一側部３Ａと他側部３Ｃの各耳部３Ｄを重ね合わせるのが困難なためである。   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.

次いで、芯材２を整形体化する工程に移行する。ここでは、前述のプレス機を利用して芯材２を定形形状にまで圧縮した後、インナーパック３の内部をバキューム減圧するために残していた前記開口を減圧後すぐにヒートシールすれば、圧縮状態を保持した芯材２をインナーパック３に収納してなる整形体５を得ることができる。ここでの開口の封止は、インナーパック３の一側部３Ａと他側部３Ｃの各前側にある耳部３Ｄどうしを、前述と同様にシールすることで簡単に行なうことができる。図７に示すように、インナーパック３の開口端部を全て封止すると、インナーパック３の内部に収納した芯材２は安定した圧縮状態に保持されるが、こうして得られた矩形状の整形体５は、例えば縦，横，厚さの各寸法がそれぞれ、1400ｍｍ，480ｍｍ，12．5〜1ｍｍ程度になり、袋状のバリア材４内に楽に収納できる形状となる。なお、ここにある数字はあくまでも一例であり、上記寸法以外の整形体５も製作可能である。   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.

なお、本実施例では、芯材２を定形形状にまで圧縮する前に、バキューム減圧用の開口以外のインナーパック３の開口端部を封止するようにしているが、図４に示す状態から、芯材２を定形形状にまで圧縮した後、インナーパック３の全ての開口端部を順に若しくは一度に封止して、所望の整形体５を得るようにしてもよい。   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.

上述したように、整形体５を得るまでの一連の製造工程では、圧縮した芯材２の形状を保持するために、芯材２にバインダーを塗布したり、圧縮状態の芯材２を所定時間焼成する必要がない。すなわち本実施例では、芯材２をインナーパック３で覆った後、芯材２を圧縮してインナーパック３の内部をバキューム減圧し、インナーパック３の開口端部をシールして、インナーパック３の内部に芯材２を圧縮状態に収納保持させるだけで、極めて短時間に安定した寸法形状の整形体５を得ることができる。また、芯材２を圧縮するプレス機の他に、インナーパック３の開口端部をシールする設備だけでよく、生産性を著しく改善できると共に、環境面でも作業場の雰囲気が悪化したり、不用物を処理する必要がなく、熱によるエネルギーロスも殆ど発生しない。しかも、芯材２は単体で何も添加されておらず、その周囲にインナーパック３が被せられているだけで、グラスウール単体が持つ極めて優れた断熱性能をそのまま維持できる。   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.

こうして得られた整形体５は、次の断熱材たる真空断熱材１の製造工程において、ガスバリア性を有する袋状のバリア材４に開口端部（図示せず）から挿入された後、真空槽に入れられて真空引きされ、前記バリア材４の開口端部をヒートシールして封止することにより、図１に示す真空断熱材１が形成される。なお、整形体５をバリア材４に挿入しやすくするために、芯材２の外側にあるインナーパック３の耳部３Ｄを折り返してもよい。また、整形体５をバリア材４の内部に挿入した後は、インナーパック３としての機能は不要になるので、当該インナーパック３の端部を切断廃棄してもよい。この場合、バリア材４の内部で芯材２が一時的に膨張復元するが、その後の真空引きで芯材２は再び圧縮されるので、最終的には所望の真空断熱材１を得ることができる。   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.

図８は、完成した真空断熱材１を示している。同図において、４Ａは前記整形体５をバリア材４に挿入した後に、バリア材４の開口端部に形成されたヒートシールによる封止部である。この真空断熱材１を円筒状に折り曲げたものが図９に示すものであり、真空断熱材１の突合せ部となる両端部を重ね合わせて円筒状にしている。同図では、全周長さ約630ｍｍ、直径200ｍｍの円筒としており、段差部14，14の寸法を5〜10ｍｍ（全周長さの約1％）に設定している。当該突合せ部では、芯材２の両端に形成された段差部14，14を互いに合わせて面一とすることにより、真空断熱材１の肉厚を全周にわたって均一とすることができる。すなわち、段差部14，14同士を重ね合わせて、突合せ部における熱のリークを減少させることができる。   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.

以上のように本実施例では、断熱体からなる芯材２と、この芯材２を圧縮状態で収納保持可能な包装体としてのインナーパック３と、外被体としてのバリア材４とからなる断熱材であって、芯材２は複数の断熱体を重ね合わせてなり、当該芯材２をずらしてその端面に段差部14を形成している。   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.

また本実施例では、断熱体からなる芯材２と、この芯材２を圧縮状態で収納保持可能な包装体としてのインナーパック３と、外被体としてのバリア材４とからなり、前記芯材２の端面の一部を取り除いて段差部14を形成している。   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.

このようにすると、断熱材を丸めて使用する場合に、端部と端部とを容易に重ね合わせることができ、突合せ部における断熱性能の低下を防ぐことができる。   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.

さらに、インナーパック３が芯材２を収納して圧縮状態に保持するので、芯材２にバインダーを塗布したり、焼成処理を行なう必要が全くなく、芯材２を短時間で安定した定形形状に保持できる。しかも、芯材２そのものにはバインダーを含め何も添加されておらず、芯材２単体としての極めて優れた断熱性能をそのまま維持できる。以上により、突合せ部からの熱のリークを減少させることが可能な断熱材を提供することができる。また、芯材２を短時間で安定した定形形状に保持でき、芯材２単体としての断熱性能をそのまま維持できる。   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.

また本実施例では、端面に段差部14が形成されるように複数の断熱体をずらしながら重ね合わせて芯材２をなし、外被体としてのバリア材４に当該芯材２を挿入して真空封止することを特徴とする。   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.

このようにすると、カット等しなくても断熱体の組合わせのみによって芯材２の端面に段差部14を形成することができ、芯材の外形を決定する外周カットに使用する型に設けられる切刃を簡素化して、コスト削減を図ることができる。従って、断熱体の組合わせのみによって芯材の端面に段差を形成することで、コスト削減を図ることができる。   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.

さらに本実施例では、断熱体からなる芯材２を所定のサイズにカットする工程でその両端部に表裏互い違いに切刃を入れておき、芯材２の乾燥工程終了後に、前記切刃の部分を取除いて前記端面に段差部14を形成し、当該芯材２を圧縮状態で収納保持可能な包装体としてのインナーパック３に圧縮状態で収納し、外被体としてのバリア材４に当該インナーパック３を挿入して真空封止している。 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.

このようにすると、芯材２の外形を決定する外周カットと同じ工程で、切刃を入れて段差部14を形成することができ、作業工程の削減を図ることができる。従って、芯材２の外周カットと同じ工程で段差部14を形成することで、作業工程の削減を図ることができる。   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.

なお、本発明は、上記実施例に限定されるものではなく、本発明の趣旨を逸脱しない範囲で変更可能である。例えば本実施例における断熱材としての真空断熱材は、あらゆる製品に対し適用できる。また、実施例におけるシート材としてのインナーパックに代わり、予め一辺のみを開口した袋状の包装体を利用してもよい。   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.

本発明の好ましい実施例における真空断熱材の縦断面図である。It is a longitudinal cross-sectional view of the vacuum heat insulating material in the preferable Example of this invention. 同上、芯材の外周をカットした状態の正面図である。It is a front view of the state which cut the outer periphery of the core material same as the above. 同上、芯材の一部である切離し部を芯材から取り除いた状態の斜視図である。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. 同上、圧縮前の芯材の周囲をインナーパックで覆った状態を示す斜視図である。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. 同上、芯材を圧縮しながら耳部を重ね合わせた状態の縦断面図である。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. 同上、芯材を圧縮しながら耳部にシール部を形成した状態の縦断面図である。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. 同上、芯材を圧縮した後の状態を示す整形体の縦断面図である。It is a longitudinal cross-sectional view of the shaping body which shows the state after compressing a core material same as the above. 同上、真空断熱材の完成状態を示す斜視図である。It is a perspective view which shows the completion state of a vacuum heat insulating material same as the above. 同上、真空断熱材の一使用例を示す斜視図である。It is a perspective view which shows one example of use of a vacuum heat insulating material same as the above.

１ 真空断熱材（断熱材）
２ 芯材
３ インナーパック（包装体）
４ バリア材（外被体）
14 段差部 1 Vacuum insulation (insulation)
2 Core 3 Inner pack (packaging body)
4 Barrier material (cover)
14 steps

Claims (1)

芯材を所定の工程で、その両端部に表裏互い違いに切刃を入れておき、前記芯材の乾燥工程終了後に、前記切刃の部分を取除いて段差部を形成し、前記芯材を圧縮状態で包装体に収納し、外被体に前記包装体を挿入して真空封止することを特徴とする断熱材の製造方法。 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.
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