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JPH11500074A - Insulation structure for the casing of the cooler - Google Patents

Insulation structure for the casing of the cooler

Info

Publication number
JPH11500074A
JPH11500074A JP8524744A JP52474496A JPH11500074A JP H11500074 A JPH11500074 A JP H11500074A JP 8524744 A JP8524744 A JP 8524744A JP 52474496 A JP52474496 A JP 52474496A JP H11500074 A JPH11500074 A JP H11500074A
Authority
JP
Japan
Prior art keywords
cooler
plastic material
seam
tool
insulating structure
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP8524744A
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Japanese (ja)
Inventor
マイケル グレイアム リード
Original Assignee
ホットポイント リミテッド
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Application filed by ホットポイント リミテッド filed Critical ホットポイント リミテッド
Publication of JPH11500074A publication Critical patent/JPH11500074A/en
Pending legal-status Critical Current

Links

Classifications

    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C51/00Shaping by thermoforming, i.e. shaping sheets or sheet like preforms after heating, e.g. shaping sheets in matched moulds or by deep-drawing; Apparatus therefor
    • B29C51/26Component parts, details or accessories; Auxiliary operations
    • B29C51/266Auxiliary operations after the thermoforming operation
    • B29C51/267Two sheets being thermoformed in separate mould parts and joined together while still in the mould
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C69/00Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
    • FMECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F25REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
    • F25DREFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
    • F25D23/00General constructional features
    • F25D23/02Doors; Covers
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/01General aspects dealing with the joint area or with the area to be joined
    • B29C66/32Measures for keeping the burr form under control; Avoiding burr formation; Shaping the burr
    • B29C66/328Leaving the burrs unchanged for providing particular properties to the joint, e.g. as decorative effect
    • B29C66/3282Leaving the burrs unchanged for providing particular properties to the joint, e.g. as decorative effect for reinforcing the joint
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/40General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
    • B29C66/41Joining substantially flat articles ; Making flat seams in tubular or hollow articles
    • B29C66/43Joining a relatively small portion of the surface of said articles
    • B29C66/432Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms
    • B29C66/4326Joining a relatively small portion of the surface of said articles for making tubular articles or closed loops, e.g. by joining several sheets ; for making hollow articles or hollow preforms for making hollow articles or hollow-preforms, e.g. half-shells
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29CSHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00General aspects of processes or apparatus for joining preformed parts
    • B29C66/50General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/54Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles
    • B29C66/545Joining several hollow-preforms, e.g. half-shells, to form hollow articles, e.g. for making balls, containers; Joining several hollow-preforms, e.g. half-cylinders, to form tubular articles one hollow-preform being placed inside the other
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2024/00Articles with hollow walls
    • BPERFORMING OPERATIONS; TRANSPORTING
    • B29WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29LINDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2031/00Other particular articles
    • B29L2031/762Household appliances
    • B29L2031/7622Refrigerators

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • General Engineering & Computer Science (AREA)
  • Refrigerator Housings (AREA)
  • Blow-Moulding Or Thermoforming Of Plastics Or The Like (AREA)
  • Moulds For Moulding Plastics Or The Like (AREA)
  • Perforating, Stamping-Out Or Severing By Means Other Than Cutting (AREA)
  • Packages (AREA)

Abstract

(57)【要約】 冷却機のドアのような断熱構造体は、プラスチック材料の2つの層(7、8)をそれぞれの工具(12、13)に当てて同時に真空成形し、シームに強度を与えるシームに沿った一体構造体を提供するために、プラスチック材料を周囲シームから移動させるような力で工具を結合させることによって、1つの作業で形成される。 (57) [Abstract] Insulation structures such as refrigerator doors are vacuum formed by simultaneously applying two layers (7, 8) of plastic material to respective tools (12, 13) to increase the strength of the seam. It is formed in one operation by combining the tools with a force to move the plastic material from the surrounding seam to provide a unitary structure along the seam to be provided.

Description

【発明の詳細な説明】 冷却機のケーシング用の断熱構造体 本発明は、冷却機のケーシング用の断熱構造体の製造に関する。 冷蔵庫、冷凍庫、冷凍庫付き冷蔵庫などの冷却機のドアパネルのような断熱構 造体は典型的には、打抜成形板金の外層と、例えば真空成形によって一体受け器 とトレイや構成要素の支持体が形成されたプラスチック材料の内層とを有してい る。 冷蔵庫のドアの外層と内層を両方ともプラスチック材料で形成し、剛性を提供 するため外層と内層との間のフォームを充填することが提案されている(米国特 許US−A−5306082号)。しかしながら、加熱したプスラック材料の包 囲体を加圧して2つのモールド片と接触させる方法(いわゆる“吹込成形法”) では、外層と内層に単純な形状を付与することができるにすぎない。内層に棚の 所要の支持体を形成するためには、まず最初に、適当な構成要素をモールド片の 一方に装荷し、吹込成形の過程でこれらの構成要素を内層に付着させなければな らない。 本発明は、冷却機のケーシングの一部を形成する断熱構造体を製造する方法で あって、減圧を加え一対のプラスチック材料のシートを対向した工具に引いて、 冷却機の内層および外層となるそれぞれの層を形成し、プスラチック材料をシー トが溶着される周囲シームから離れる方に移動させるのに十分な力で、工具を結 合させることを特徴とする方法を提供する。 真空成形の使用と、プラスチック材料をシームから離れる方に移動させるのに 十分な圧力との組合せにより、棚のような小部品を内層と一体に成形することが でき、外層の良好な外観並びに外層と内層との間の十分なシームを得ることがで きる。 しかる後、このように形成された構造体から余分な材料をトリミングするのが よい。工具を結合させる力は好ましくは、工具を結合させる前のシートの結合厚 さの2/3以下、好ましくは1/2以下の厚さにシームを押しつぶす程のもので ある。 外層と内層に異なる材料を使用するのが望ましい。 外層と内層との間の空間には、フォーム又は固形充填材料を充填し、しかる後 その空間を排気するのがよい。 断熱体は、冷蔵庫、冷凍庫、又は冷凍庫付き冷蔵庫のドアでもよいが、本発明 の方法を使用してこのような冷却機のキャビネットを製造することも可能である 。 本発明は、本発明の方法に従って製造された断熱構造体も提供する。 次に、本発明に従って製造された冷却機のケーシング用の断熱構造体について 、添付図面を参照して例示的に説明する。 第1図は、冷蔵庫の斜視図である。 第2図は、冷蔵庫のドアの平面図である。 第3図は、冷蔵庫のドアの正面図である。 第4図は、冷蔵庫のドアの側面図である。 第5図は、第3図の線A−Aにおけるドアの頂部の概略断面図である。 第6図は、第1図〜第5図に示されたドアを製造するための装置の概略図であ る。 第7図は、製造後のドアの断面図であって、第1図の部分B−Bに対応するも のである。 第8図は、第6図の装置の一部の拡大図である。 第9図は、従来技術の溶着の方法を示した図である。 第10図は、プラスチック材料の1つのシートを示したものである。 第11図は、第1図の冷蔵庫のキャビネットを形成する断熱構造体を製造する ための装置を概略的に示したものである。 第12図は、第11図の装置によって製造された断熱構造体の水平横断面図で あって、第1図に示された冷蔵庫のキャビネットを水平横断面に対応するもので ある。 全ての図面において、同じ部分には同じ参照符号が付されている。 第1図を参照すると、冷蔵庫は、本発明に従って各々製造されたドア1とキャ ビネット2とによって構成されている。冷蔵庫は、冷却回路にコンプレッサ、コ ンデンサ、およびエバポレータを備えているが、これらは、図示されていない。 ドアは、内層3と、外層4とによって構成されており(第7図)、キャビネット は、内層5と、外層6とによって構成されている(第12図)。 特に第1図および第7図から分かるように、内層3には、垂直方向に延びた突 起3a〜3cが一体に形成されている。ドアの内層3は又、ドアの周囲に延びた 凹部3dを有しており(第5図にのみ示されている)、凹部3dは、使用時に磁 石を組み込んだドアシール(図示せず)が取付けられる溝として役立つ。ドアの 外層は、図2および図5に示されるように、ドアを開けるためのハンドルとして 役立つ一体凹部4aを有している。 キャビネットの内層5には、棚(図示せず)を保持するため、隆起したリブ5 a〜5cが設けられている。突起3a〜3cにも、棚と区画室を支持するため、 隆起したボス又はリブ(図示せず)が設けられている。 第6図を参照すると、ドアは次のように製造される。プラスチック材料の2つ のシート7、8を、フレーム9、10、11によって別々に保持しつつ軟化点以 上になるまで頂部と底部からそれぞれ加熱する。 次いで、シートを、一対の工具12、13の間の位置まで横に移動させる。こ れらのシートを、これらのプラスチック材料の軟化点よりも僅かに低い温度に維 持する。工具は、オリフィス12a、13aを有するものとして示されているが 、実際には、各工具は、数百のこのようなオリフィスを有している。オリフィス は、工具の前面に真空を加えるために設けられている。 作動の際、工具12、13を結合させて、矩形の隆起した突起12b、13b をそれぞれのシート7、8と接触させる。この時点で、シート7を工具12に当 てシート8を工具13に当てて真空成形するために、真空を加える。フレーム1 0のオリフィス10aは、空気の必要な流入を可能にする。この時点まで、シー ト7、8は依然として互いに分離しているが、シート7、8が周囲の矩形突起1 2b、13bの間で互いに接触するまで、工具を結合させ続ける。工具を付勢す る力は、例えば(工具でシート14、15を集めることを示している)第9図に 示される従来技術における作動の場合のようにシート7、8を結合させて互いに 接触させるだけでなく、シーム線での結合厚さがシート7、8の結合厚さ以下で あるようにシーム線から材料を移動させるようなものである。これは、第8図に 明瞭に示されている。突起12b、13bは、第6図では簡略化されていること に留意されたい。プラスチック材料のシーム線から離れる変位の影響として、第 1に、シーム線(C−C)が非圧縮層7、8の結合厚さの約半分であり、第2に 、プラスチック材料が膨らみ16の形態をして移動しシームの内縁のまわりにビ ードを形成することである。シート4の非変形縁が第8図では破線で示されてい ることに留意されたい。シートは、異なるプラスチック材料で形成されていても よいが、プラスチック材料を絞り出すと、シームのところで一体の構造体となる であろう。 工具の温度は、シート7、8の軟化温度以下であり、工具を分離するために空 気をオリフィス12a、13aに吹き込むと、シートは徐々に硬化する。次に、 例えばギロチンを使用して成形品を線C−Cのところでトリミングするが、所望 ならば、ルーチングやレーザ切断を使用してもよい。第9図の接触溶着によって 生成されるシームの不満足な性質は、トリミング作業の後に特に明らかになるで あろう。何故ならば、シートがシームに沿って分離する傾向があるからである。 図示されていない孔をシート4の下側壁に残し、ポリウレタンのようなプラス チックフォーム材料をこの孔に注入してシート3とシート4との間の空間を満た す。或いは、真空によりドアを事実上断熱させるために、孔を密封する前に孔に 真空を加えつつモールドを振動させることによって、孔にシリカやフライアッシ ュのような粉末の粒子を充填してもよい(EP0190582号、EP0254 993号)。後者の場合には、プラスチック材料の各シートが、構造層18に加 えて、ポリプロピレンのような遮水層を備えたEVOH(エチレンビニルアルコ ール)のような一体の気体不透過層を有する多層構造体によって構成されている ことが必要である。 このようにして製造されたドアは、まずまずの外観を有し、充填材料のため剛 であり、普通の棚を取付けるため内層に所要の一体形成物を有しており、これら は全て、1つのモールドおよび充填作業で達成される。 一般的には、外層7を内層8よりも厚いプラスチック材料で形成するのが望ま しいことが分かるであろう。外層に適した材料は、ABS(アクリロニトリル・ ブタジエン・スチレン)、耐衝撃性のポリスチレン、ポリカーボネート、又はポ リプロピレンである。内層に適した材料は、高価なため内層には一般には使用さ れないポリカーボネートを除いた上述の材料のいずれかである。層の典型的な厚 さは、外層では5mm、内層では3mmであり、工具間で押しつぶした後の典型 的な厚さは、4mm以下である。一般的には、外層は外観によって選定され、内 層は深絞り成形される能力によって選定される。 凹部4aのようなアンダーカットの場合には、工具は、モールドから工具を引 き抜くために、伸縮自在の部分を有しているのがよい。これは、ヒンジ構造体を 受け入れるように形成された凹部についても当てはまる。 キャビネットの製造についても同じ手順が採用される(第11図、第12図) 。ドアの製造の同様なやり方において、(積層状のものであれ、そうでないもの であれ)プラスチック材料のシートをフレーム9、10、11間に保持し、関連 材料の軟化点以上に加熱し、一対の工具21、22間に側方に運ぶ。21a、2 2aで示されるような数百のオリフィスの一方のところに加えられる真空によっ てシートをそれぞれの工具に引っ張りながら、矩形の突起21b、22bがシー トと接触するまで、工具21、22を結合させる。シーム線のところでの材料の 結合厚さが非変形シートの結合厚さ以下となる程度まで材料がシーム線から移動 するまで、工具の型締圧を維持する。孔10aからの空気により、シートが工具 上に引かれる。 内層7の典型的な材料は、結晶ポリスチレン、耐衝撃性のポリスチレン、AB S、ポリプロピレンであり、外層8の典型的な材料は、上述の内層の材料やポリ カーボネートである。適当な厚さは、内層7では約5mmであり、外層8では約 6mmである。シート7、8は、ドアについては積層構造とすることができる。 このようにして、キャビネットは、1つの作業で形成され、冷却機に、好まし くはモジュールとして取付けさえすればよい。 もちろん、本発明の範囲から逸脱することなしに、変形を行うことができる。 かくして、上述の実施例は冷蔵庫であるが、本発明は、各区画室に対して1以上 のドアを有する冷凍庫や冷凍庫付き冷蔵庫にも適用することができる。DETAILED DESCRIPTION OF THE INVENTION                     Insulation structure for the casing of the cooler   The present invention relates to the production of a heat insulating structure for a casing of a cooler.   Insulation structure such as the door panel of refrigerators such as refrigerators, freezers and refrigerators with freezers The structure is typically integrated with the outer layer of a stamped sheet metal, And an inner layer of plastic material on which the tray and component supports are formed You.   Both outer and inner layers of refrigerator door are made of plastic material to provide rigidity It has been proposed to fill the foam between the outer and inner layers to No. US-A-5306082). However, packaging of heated pushlac material A method in which an enclosure is pressed and brought into contact with two mold pieces (so-called "blow molding method") Then, only a simple shape can be given to the outer layer and the inner layer. Inner layer of shelves To form the required support, the appropriate components must first be These components must be loaded onto one side and adhere to the inner layer during the blow molding process. No.   The present invention relates to a method for manufacturing a heat insulating structure forming a part of a casing of a cooler. Then, apply a reduced pressure and pull a pair of sheets of plastic material to the opposite tool, Form the inner and outer layers of the cooler, and seal the plastic material. Connect the tool with enough force to move it away from the surrounding seam where the Providing a method characterized in that:   Use vacuum forming and to move plastic material away from the seam Combined with sufficient pressure, small parts such as shelves can be integrally molded with the inner layer. To obtain a good appearance of the outer layer and a sufficient seam between the outer and inner layers. Wear.   Thereafter, trimming excess material from the structure thus formed is Good. The force for joining the tools is preferably the joining thickness of the sheet before joining the tools. It is enough to crush the seam to a thickness of less than 2/3, preferably less than 1/2 is there.   It is desirable to use different materials for the outer and inner layers.   The space between the outer and inner layers is filled with foam or solid filling material and then The space should be evacuated.   The heat insulator may be a refrigerator, a freezer, or a door of a refrigerator with a freezer. It is also possible to manufacture such a refrigerator cabinet using the method of .   The present invention also provides a thermal insulation structure manufactured according to the method of the present invention.   Next, a heat insulating structure for a casing of a cooler manufactured according to the present invention will be described. , Will be exemplarily described with reference to the accompanying drawings.   FIG. 1 is a perspective view of a refrigerator.   FIG. 2 is a plan view of a refrigerator door.   FIG. 3 is a front view of the door of the refrigerator.   FIG. 4 is a side view of the door of the refrigerator.   FIG. 5 is a schematic cross-sectional view of the top of the door at line AA in FIG.   FIG. 6 is a schematic diagram of an apparatus for manufacturing the door shown in FIGS. 1 to 5. You.   FIG. 7 is a cross-sectional view of the door after manufacture, which corresponds to a portion BB in FIG. It is.   FIG. 8 is an enlarged view of a part of the apparatus of FIG.   FIG. 9 is a view showing a conventional welding method.   FIG. 10 shows one sheet of plastic material.   FIG. 11 manufactures a heat insulating structure forming the refrigerator cabinet of FIG. 1 schematically shows an apparatus for performing the above.   FIG. 12 is a horizontal cross-sectional view of the heat insulating structure manufactured by the apparatus of FIG. The cabinet of the refrigerator shown in FIG. 1 corresponds to a horizontal cross section. is there.   In all the drawings, the same parts have the same reference characters allotted.   Referring to FIG. 1, a refrigerator comprises a door 1 and a cabinet, each manufactured according to the present invention. And vignette 2. Refrigerators have compressors and A condenser and an evaporator, which are not shown. The door is composed of an inner layer 3 and an outer layer 4 (FIG. 7), and a cabinet. Is composed of an inner layer 5 and an outer layer 6 (FIG. 12).   In particular, as can be seen from FIGS. 1 and 7, the inner layer 3 has a vertically extending protrusion. Protrusions 3a to 3c are formed integrally. Door inner layer 3 also extended around the door It has a recess 3d (only shown in FIG. 5), which is magnetic during use. It serves as a groove in which a door seal (not shown) incorporating the stone is mounted. Door The outer layer serves as a handle for opening the door, as shown in FIGS. It has a useful integral recess 4a.   The inner layer 5 of the cabinet has raised ribs 5 for holding shelves (not shown). a to 5c are provided. The projections 3a to 3c also support shelves and compartments, Raised bosses or ribs (not shown) are provided.   Referring to FIG. 6, the door is manufactured as follows. Two of plastic materials Sheets 7, 8 are held separately by the frames 9, 10, 11 while maintaining their softening points. Heat from top and bottom respectively until top.   Next, the sheet is moved laterally to a position between the pair of tools 12 and 13. This Keep these sheets at a temperature slightly below the softening point of these plastic materials. Carry. The tool is shown as having orifices 12a, 13a In practice, each tool has hundreds of such orifices. Orifice Is provided for applying a vacuum to the front of the tool.   In operation, the tools 12, 13 are joined to form rectangular raised protrusions 12b, 13b. Is brought into contact with the respective sheets 7 and 8. At this point, the sheet 7 is applied to the tool 12. In order to apply the sheet 8 to the tool 13 to form a vacuum, a vacuum is applied. Frame 1 The zero orifice 10a allows the required inflow of air. Up to this point, 7 and 8 are still separated from each other, but the sheets 7 and 8 are Continue to couple the tools until they contact each other between 2b, 13b. Bias the tool For example, the force is shown in FIG. 9 (showing that the sheets 14, 15 are collected by a tool). Seats 7, 8 are joined together as in the case of the prior art operation shown. In addition to contacting, when the bonding thickness at the seam line is less than the bonding thickness of sheets 7 and 8 It's like moving material off a seam line as it is. This is shown in FIG. It is clearly shown. The projections 12b and 13b are simplified in FIG. Please note. The effect of displacement away from the seam line of plastic material First, the seam line (C-C) is about half of the combined thickness of the non-compressed layers 7, 8; The plastic material moves in the form of a bulge 16 and forms a bead around the inner edge of the seam. To form a code. The undeformed edge of the sheet 4 is shown in dashed lines in FIG. Note that Even if the sheets are made of different plastic materials Good, but when squeezing out plastic material, it becomes an integrated structure at the seam Will.   The temperature of the tool is below the softening temperature of the sheets 7, 8 and is When air is blown into the orifices 12a, 13a, the sheet gradually hardens. next, The trim is trimmed at line CC using, for example, guillotine, but Then, routing or laser cutting may be used. By the contact welding of FIG. The unsatisfactory nature of the resulting seam is particularly apparent after the trimming operation. There will be. This is because the sheets tend to separate along the seam.   Leave a hole (not shown) on the lower wall of the sheet 4 and add Tick foam material is injected into these holes to fill the space between sheets 3 and 4. You. Alternatively, the hole may be sealed before the hole is sealed, to effectively insulate the door with a vacuum. By vibrating the mold while applying a vacuum, silica or fly Powder particles such as a powder (EP0190582, EP0254). No. 993). In the latter case, each sheet of plastic material is added to the structural layer 18. EVOH (Ethylene Vinyl Alcohol) with a waterproof layer such as polypropylene And a multilayer structure having an integral gas impermeable layer such as It is necessary.   Doors manufactured in this way have a decent appearance and are rigid due to the filling material. And have the necessary integral formations in the inner layer to attach ordinary shelves, Are all accomplished in one mold and fill operation.   Generally, it is desirable that the outer layer 7 be formed of a plastic material thicker than the inner layer 8. You will see that Materials suitable for the outer layer are ABS (acrylonitrile Butadiene styrene), high-impact polystyrene, polycarbonate, It is polypropylene. Materials that are suitable for the inner layer are generally used for the inner layer because they are expensive. Any of the materials described above except for the polycarbonate. Typical thickness of layer The height is 5mm for the outer layer and 3mm for the inner layer, typical after crushing between tools. The typical thickness is 4 mm or less. Generally, the outer layer is selected by appearance, The layers are selected according to their ability to be deep drawn.   In the case of an undercut such as the recess 4a, the tool pulls the tool from the mold. It is desirable to have a telescopic part for punching out. This requires a hinge structure The same is true for recesses formed to receive.   The same procedure is adopted for manufacturing cabinets (FIGS. 11 and 12). . In a similar manner in the manufacture of doors, whether laminated or not A) holding a sheet of plastic material between frames 9, 10, 11 The material is heated above the softening point of the material and transported laterally between the pair of tools 21 and 22. 21a, 2 The vacuum applied to one of the hundreds of orifices as shown at 2a While pulling the sheet to each tool, the rectangular projections 21b and 22b The tools 21 and 22 are coupled until they come into contact with the tool. Of the material at the seam line Material moves from seam line until bond thickness is less than or equal to bond thickness of undeformed sheet Until the tool clamping pressure is maintained. The sheet is tooled by the air from the hole 10a. Pulled up.   Typical materials for the inner layer 7 are crystalline polystyrene, high impact polystyrene, AB S, polypropylene, and a typical material of the outer layer 8 is the above-described material of the inner layer or It is a carbonate. A suitable thickness is about 5 mm for the inner layer 7 and about 5 mm for the outer layer 8. 6 mm. The sheets 7 and 8 may have a laminated structure for the door.   In this way, the cabinet is formed in one operation and the cooler is preferably Or as a module.   Of course, modifications may be made without departing from the scope of the invention. Thus, while the above embodiments are refrigerators, the present invention provides one or more for each compartment. It can be applied to a freezer having a door or a refrigerator with a freezer.

───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.6 識別記号 FI F25D 23/08 F25D 23/08 D ──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. 6 Identification code FI F25D 23/08 F25D 23/08 D

Claims (1)

【特許請求の範囲】 1.冷却機のケーシングの一部を形成する断熱構造体を製造する方法であって、 減圧を加え一対のプラスチック材料のシートを対向した工具に引いて、冷却機の 内層および外層となるそれぞれの層を形成し、プスラチック材料をシートが溶着 される周囲シームから離れる方に移動させるのに十分な力で、工具を結合させる ことを特徴とする方法。 2.前記力が、シームのところでの厚さがシートが圧縮される前の結合厚さの半 分以下となる程度まで、プラスチック材料をシームから離れる方に移動させるの に十分であることを特徴とする請求の範囲第1項に記載の方法。 3.冷却機のケーシングの一部を形成する断熱構造体を製造するための装置であ って、一対のプラスチック材料のシートを対向した工具に引いて冷却機の内層お よび外層となるそれぞれの層を形成するため、減圧を加えるための手段を備え、 該手段が、プラスチック材料をシートが溶着される周囲シームから離れる方に移 動させるのに十分な力で工具を結合させるために設けられていることを特徴とす る装置。 4.請求の範囲第1項又は第2項に記載の方法に従って製造される断熱構造体。 5.断熱構造体が、冷却機のドアであることを特徴とする請求の範囲第4項に記 載の装置。 6.断熱構造体が、冷却機のキャビネットであることを特徴とする請求の範囲第 4項に記載の装置。[Claims] 1. A method for manufacturing a heat insulating structure forming a part of a casing of a cooler, Apply vacuum and pull a pair of sheets of plastic material against the opposite tool to The inner layer and the outer layer are formed, and the sheet is welded with the plastic material. The tool with enough force to move it away from the surrounding seam A method comprising: 2. The force is such that the thickness at the seam is half of the combined thickness before the sheet is compressed. Move the plastic material away from the seam until it is less than 2. The method according to claim 1, wherein the method is sufficient. 3. A device for manufacturing a heat insulating structure forming a part of a casing of a cooler. Therefore, a pair of sheets of plastic material is pulled on the facing tool and the inner layer of the cooler and And means for applying reduced pressure to form each layer to be an outer layer, The means transfers the plastic material away from the surrounding seam to which the sheet is welded. Provided for coupling the tool with sufficient force to move it. Device. 4. An insulating structure manufactured according to the method according to claim 1. 5. The heat insulating structure is a door of a cooler. On-board equipment. 6. The heat insulating structure is a cabinet of a cooler, wherein the heat insulating structure is a cabinet of a cooler. Item 5. The device according to item 4.
JP8524744A 1995-02-16 1996-02-13 Insulation structure for the casing of the cooler Pending JPH11500074A (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
GB9503009.4 1995-02-16
GB9503009A GB2297937A (en) 1995-02-16 1995-02-16 Insulated structure for the casing of a refrigeration appliance
PCT/GB1996/000296 WO1996025287A1 (en) 1995-02-16 1996-02-13 Insulated structure for the casing of a refrigeration appliance

Publications (1)

Publication Number Publication Date
JPH11500074A true JPH11500074A (en) 1999-01-06

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Application Number Title Priority Date Filing Date
JP8524744A Pending JPH11500074A (en) 1995-02-16 1996-02-13 Insulation structure for the casing of the cooler

Country Status (6)

Country Link
EP (1) EP0809569A1 (en)
JP (1) JPH11500074A (en)
KR (1) KR19980702250A (en)
GB (1) GB2297937A (en)
TR (1) TR199700773T1 (en)
WO (1) WO1996025287A1 (en)

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KR101227516B1 (en) * 2010-10-28 2013-01-31 엘지전자 주식회사 A refrigerator comprising a vacuum space
US8857931B2 (en) 2010-10-28 2014-10-14 Lg Electronics Inc. Refrigerator with vacuum space
US9170046B2 (en) 2010-10-28 2015-10-27 Lg Electronics Inc. Refrigerator comprising vacuum space
US10161670B2 (en) 2010-10-28 2018-12-25 Lg Electronics Inc. Refrigerator comprising vacuum space
US10174989B2 (en) 2010-10-28 2019-01-08 Lg Electronics Inc. Refrigerator with vacuum space
US10465974B2 (en) 2010-10-28 2019-11-05 Lg Electronics Inc. Refrigerator comprising vacuum space
US10591199B2 (en) 2010-10-28 2020-03-17 Lg Electronics Inc. Refrigerator with vacuum space
US11199357B2 (en) 2010-10-28 2021-12-14 Lg Electronics Inc. Refrigerator with vacuum space
US11732951B2 (en) 2010-10-28 2023-08-22 Lg Electronics Inc. Refrigerator with vacuum space

Also Published As

Publication number Publication date
TR199700773T1 (en) 1998-02-21
KR19980702250A (en) 1998-07-15
GB2297937A (en) 1996-08-21
WO1996025287A1 (en) 1996-08-22
GB9503009D0 (en) 1995-04-05
EP0809569A1 (en) 1997-12-03

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