JPH0998892A - Heat insulating double-wall container made of synthetic resin and molding method for outer container - Google Patents
Heat insulating double-wall container made of synthetic resin and molding method for outer containerInfo
- Publication number
- JPH0998892A JPH0998892A JP7260551A JP26055195A JPH0998892A JP H0998892 A JPH0998892 A JP H0998892A JP 7260551 A JP7260551 A JP 7260551A JP 26055195 A JP26055195 A JP 26055195A JP H0998892 A JPH0998892 A JP H0998892A
- Authority
- JP
- Japan
- Prior art keywords
- container
- outer container
- synthetic resin
- opening
- injection molding
- 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.)
- Granted
Links
- 229920003002 synthetic resin Polymers 0.000 title claims abstract description 46
- 239000000057 synthetic resin Substances 0.000 title claims abstract description 46
- 238000000465 moulding Methods 0.000 title claims description 38
- 238000000034 method Methods 0.000 title claims description 19
- 238000001746 injection moulding Methods 0.000 claims abstract description 55
- 239000000853 adhesive Substances 0.000 claims description 30
- 230000001070 adhesive effect Effects 0.000 claims description 30
- 238000007789 sealing Methods 0.000 claims description 27
- 239000007789 gas Substances 0.000 claims description 24
- 230000005855 radiation Effects 0.000 claims description 18
- 239000000463 material Substances 0.000 claims description 15
- XKRFYHLGVUSROY-UHFFFAOYSA-N Argon Chemical compound [Ar] XKRFYHLGVUSROY-UHFFFAOYSA-N 0.000 claims description 12
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 claims description 8
- 229910052743 krypton Inorganic materials 0.000 claims description 8
- DNNSSWSSYDEUBZ-UHFFFAOYSA-N krypton atom Chemical compound [Kr] DNNSSWSSYDEUBZ-UHFFFAOYSA-N 0.000 claims description 8
- BQCADISMDOOEFD-UHFFFAOYSA-N Silver Chemical compound [Ag] BQCADISMDOOEFD-UHFFFAOYSA-N 0.000 claims description 7
- 239000004830 Super Glue Substances 0.000 claims description 7
- FGBJXOREULPLGL-UHFFFAOYSA-N ethyl cyanoacrylate Chemical compound CCOC(=O)C(=C)C#N FGBJXOREULPLGL-UHFFFAOYSA-N 0.000 claims description 7
- 229910052782 aluminium Inorganic materials 0.000 claims description 6
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 6
- 229910052786 argon Inorganic materials 0.000 claims description 6
- 239000011889 copper foil Substances 0.000 claims description 6
- 239000011888 foil Substances 0.000 claims description 6
- 230000002265 prevention Effects 0.000 claims description 6
- 229910052724 xenon Inorganic materials 0.000 claims description 6
- FHNFHKCVQCLJFQ-UHFFFAOYSA-N xenon atom Chemical compound [Xe] FHNFHKCVQCLJFQ-UHFFFAOYSA-N 0.000 claims description 6
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000002184 metal Substances 0.000 claims description 5
- 230000000149 penetrating effect Effects 0.000 claims description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 10
- 230000002950 deficient Effects 0.000 abstract description 2
- 229920005668 polycarbonate resin Polymers 0.000 abstract description 2
- 239000004431 polycarbonate resin Substances 0.000 abstract description 2
- 239000000243 solution Substances 0.000 abstract 1
- 238000009413 insulation Methods 0.000 description 8
- 238000003466 welding Methods 0.000 description 7
- 230000007547 defect Effects 0.000 description 6
- 238000005304 joining Methods 0.000 description 5
- 230000004888 barrier function Effects 0.000 description 4
- 238000005520 cutting process Methods 0.000 description 4
- 238000007747 plating Methods 0.000 description 4
- 229920005989 resin Polymers 0.000 description 4
- 239000011347 resin Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 230000003449 preventive effect Effects 0.000 description 3
- 230000015572 biosynthetic process Effects 0.000 description 2
- 229910052802 copper Inorganic materials 0.000 description 2
- 239000010949 copper Substances 0.000 description 2
- 238000006073 displacement reaction Methods 0.000 description 2
- 238000005538 encapsulation Methods 0.000 description 2
- 239000011810 insulating material Substances 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- 229910052709 silver Inorganic materials 0.000 description 2
- 239000004332 silver Substances 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 239000004743 Polypropylene Substances 0.000 description 1
- 229920006328 Styrofoam Polymers 0.000 description 1
- 229920000122 acrylonitrile butadiene styrene Polymers 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000012790 confirmation Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 239000004794 expanded polystyrene Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000002093 peripheral effect Effects 0.000 description 1
- 229920000515 polycarbonate Polymers 0.000 description 1
- 239000004417 polycarbonate Substances 0.000 description 1
- 239000004645 polyester resin Substances 0.000 description 1
- 229920001225 polyester resin Polymers 0.000 description 1
- -1 polypropylene Polymers 0.000 description 1
- 229920001155 polypropylene Polymers 0.000 description 1
- 239000008261 styrofoam Substances 0.000 description 1
Landscapes
- Thermally Insulated Containers For Foods (AREA)
- Laminated Bodies (AREA)
- Chemically Coating (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、クーラーボック
ス、魔法瓶、保温弁当箱、保温食器などとして使用され
る合成樹脂製断熱二重壁容器およびその外容器の成形方
法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat-insulating double-walled container made of a synthetic resin used as a cooler box, a thermos bottle, a heat-insulating lunch box, a heat-insulating tableware, etc., and a method for molding the outer container.
【０００２】[0002]
【従来の技術】このクーラーボックス等の断熱容器とし
ては、合成樹脂製の内容器と外容器で構成された二重壁
容器の断熱空間層に、空気より低熱伝導率ガスを封入し
たものが提案されている。このような合成樹脂製断熱二
重壁容器は断熱空間層内に低熱伝導率ガスを置換封入す
るために、外容器もしくは内容器の一部に置換封入用の
開孔部が形成されている。この開孔部は外観上目立たな
い位置に設けられる。また内容器と外容器を接合後、内
外容器により形成された空間に開孔部より低熱伝導率が
スを置換封入して封止板で封止されるが、このような一
連の作業がしやすいようにするために、開孔部は外容器
の底部中央部に設けられるのが一般的である。2. Description of the Related Art As a heat insulating container such as a cooler box, a double wall container composed of an inner container and an outer container made of a synthetic resin, in which a gas having a lower thermal conductivity than air is filled, is proposed. Has been done. In such a heat-insulating double-walled container made of synthetic resin, an opening portion for displacement encapsulation is formed in a part of the outer container or the inner container in order to replace and seal the low thermal conductivity gas in the heat insulating space layer. This opening portion is provided at a position that is inconspicuous in appearance. In addition, after joining the inner and outer containers, the low thermal conductivity is replaced by the open holes in the space formed by the inner and outer containers and sealed with a sealing plate. For simplicity, the opening is generally provided in the center of the bottom of the outer container.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、外容器
の成形時においては、外容器の底部中央部に開孔部が設
けられるように金型を作製するため、金型の射出成形用
のゲート位置を外容器の底部中央部以外の他の箇所に設
けなければならない。このため、中心に対して左右対称
形である外容器を形成する金型の成形空間への合成樹脂
の流れ込みが外容器の周壁端部に対して一様でなくなる
ため、外容器成形品はウエルドの不良を起こしやすく、
偏心、歪み等の外観不良や強度不足を生じやすくなり、
さらに不良率の増加によるコストアップを招く不都合が
ある。また、外容器の底部中央部に射出成形用のゲート
位置を配置した場合は、成形後にゲートカット部の穴開
け加工が必要となる。この穴開け加工は、穴径が約１ｍ
ｍと小さい上に位置決め精度を必要とするので成形時の
コストの増加を招く。その結果として、外容器を安価に
製造できない不都合を生じる。However, when molding the outer container, the mold is manufactured so that the opening is provided in the center of the bottom of the outer container. Therefore, the gate position for injection molding of the mold is required. Must be provided at a location other than the center of the bottom of the outer container. For this reason, the flow of synthetic resin into the molding space of the mold that forms the outer container, which is symmetrical with respect to the center, is not uniform with respect to the peripheral wall end of the outer container. It is easy to cause
Defects such as eccentricity and distortion and insufficient strength are likely to occur,
Further, there is an inconvenience that the cost increases due to the increase of the defective rate. Further, when the gate position for injection molding is arranged at the center of the bottom of the outer container, it is necessary to punch the gate cut portion after molding. This drilling process has a hole diameter of about 1 m.
In addition to being as small as m, the positioning accuracy is required, so that the cost at the time of molding is increased. As a result, there arises a disadvantage that the outer container cannot be manufactured inexpensively.
【０００４】また、外容器と内容器とからなる合成樹脂
製二重壁容器で内外容器の空間に低熱伝導率ガスを充填
して断熱性能を得る場合、ガスの充填作業等のため外容
器の底部中央に開孔部を形成するが、開孔部を保護する
必要が生ずる。そのため、開孔部を中心とした凹部を設
けこの凹部に封止板を嵌合させて封止するが、凹部の形
成のため凹部近傍の肉厚が薄くなり強度が弱まる不都合
が生じる。本発明は前記不都合を有効に解決するもの
で、製造コストが小さく、ウエルド等の不良を起こすこ
となく、外観的にも強度的にも優れた合成樹脂製断熱二
重壁容器およびその外容器の製造方法を提供するもので
ある。Further, in the case of a double wall container made of a synthetic resin consisting of an outer container and an inner container, when the space of the inner and outer containers is filled with a gas having a low thermal conductivity to obtain heat insulation performance, the outer container is filled with the gas for the gas filling work. An opening is formed in the center of the bottom, but it becomes necessary to protect the opening. Therefore, although a recess centering on the opening is provided and the sealing plate is fitted into the recess for sealing, the thickness of the vicinity of the recess becomes thin and the strength becomes weak due to the formation of the recess. INDUSTRIAL APPLICABILITY The present invention effectively solves the above-mentioned inconveniences, that is, the manufacturing cost is low, and the heat insulation double-walled container made of synthetic resin excellent in appearance and strength without causing defects such as weld and its outer container. A manufacturing method is provided.
【０００５】[0005]
【課題を解決するための手段】本発明の合成樹脂製断熱
二重壁容器は、合成樹脂製の内容器と外容器とをそれぞ
れの口部で連結して内容器を外容器内に空間を隔てて収
容して二重壁容器となし、前記内容器と外容器とで形成
した空間部を断熱層としてなる合成樹脂製断熱二重壁容
器において、前記外容器の底部中央部に、底部壁厚が均
一となるように、外側表面に凹部、断熱層側表面に凸部
を備えた段部が設けられ、該段部の中心に底部壁を貫通
する開孔部を設けてなるとともに、前記空間部にキセノ
ン、クリプトン、アルゴンのうちの少なくとも１種から
なる低熱伝導率ガスが封入され、前記凹部に封止板を配
して前記開孔部を封じてなることを特徴としている。In the heat insulating double-walled container made of synthetic resin of the present invention, an inner container made of synthetic resin and an outer container are connected at their respective mouths to form a space inside the outer container. A heat-insulating double-walled container made of a synthetic resin in which the space formed by the inner container and the outer container serves as a heat-insulating layer, the space between the inner container and the outer container being separated from each other to form a double-walled container. In order to make the thickness uniform, a step portion having a concave portion on the outer surface and a convex portion on the heat insulating layer side surface is provided, and an opening portion penetrating the bottom wall is provided at the center of the step portion, and A low thermal conductivity gas made of at least one of xenon, krypton, and argon is sealed in the space, and a sealing plate is arranged in the recess to seal the opening.
【０００６】前記開孔部は、外容器の底部外表面の凹部
側から断熱層空間の凸部側に向けて開孔部が縮径してな
るとともに、該開孔部が接着剤で封止されてなることが
望ましい。この接着剤はシアノアクリレート系の接着剤
であることが望ましい。The opening portion has a diameter reduced from the concave portion of the outer surface of the bottom portion of the outer container toward the convex portion of the heat insulating layer space, and the opening portion is sealed with an adhesive. It is desirable to be done. The adhesive is preferably a cyanoacrylate adhesive.
【０００７】また、合成樹脂製断熱二重壁容器を形成す
る内容器と外容器の空間部に面する裏面のうち少なくと
も内容器の表面に、金属製の輻射防止材が設けられてな
ることが望ましい。この輻射防止材は、メッキ膜、アル
ミ箔、銅箔、銀箔のうちの１種であることが望ましい。Further, a metal radiation preventive material may be provided on at least the front surface of the inner container among the back surfaces facing the space of the inner container and the outer container forming the heat insulating double-walled container made of synthetic resin. desirable. This radiation preventing material is preferably one of a plated film, an aluminum foil, a copper foil, and a silver foil.
【０００８】本発明の合成樹脂製断熱二重壁容器の外容
器の成形方法は、合成樹脂製の内容器と外容器とをそれ
ぞれの口部で連結して内容器を外容器内に空間を隔てて
収容して二重壁容器を形成してなる合成樹脂製断熱二重
壁容器の外容器を、雄型と雌型からなる金型内に形成さ
れた射出成形用空間部の内部に射出成形用ゲートから合
成樹脂を射出して成形する方法において、外容器の内表
面を形成するための雄型には、外容器の底部壁中央部に
対応する射出成形面に成形用凹部を設け、かつ該成形用
凹部の中央部に射出成形用ゲートを設け、外容器の外表
面を形成するための雌型には、前記雄型に成形用凹部を
形成したことにより凸部が形成されるように、その射出
成形面に成形用凸部を設け、かつその径が前記射出成形
用ゲート径よりも小さく、その長さが前記射出成形用空
間部厚みより長くなるように該成形用凸部の中央に開孔
用凸部を設け、次いで前記射出成形用ゲート内に前記開
孔用凸部の先端を挿入するようにして、前記雄型と前記
雌型を組み合わせ、前記射出成形用空間部に前記射出成
形用ゲートから合成樹脂を射出して成形品を得た後、前
記射出成形用ゲートによって形成されたゲートピンを切
断することにより、前記外容器の底部中央部に開孔部を
形成することを特徴としている。前記開孔用凸部が基端
部から先端部に向けて縮径することが望ましい。According to the method for molding an outer container of a heat-insulating double-walled container made of synthetic resin of the present invention, an inner container made of synthetic resin and an outer container are connected at their respective mouths to form a space inside the outer container. An outer container of a heat-insulating double-walled container made of synthetic resin, which is housed separately to form a double-walled container, is injected into an injection molding space formed in a mold made of a male mold and a female mold. In the method of injecting a synthetic resin from a molding gate to mold, a male mold for forming the inner surface of the outer container is provided with a molding recess on the injection molding surface corresponding to the center of the bottom wall of the outer container, In addition, an injection molding gate is provided in the center of the molding recess, and the female mold for forming the outer surface of the outer container is formed with the convex recess by forming the molding recess in the male mold. , A molding convex portion is provided on the injection molding surface, and the diameter thereof is larger than the injection molding gate diameter. A protrusion for opening is provided in the center of the protrusion for molding so that its length is longer than the thickness of the space for injection molding, and then the tip of the protrusion for opening is provided in the gate for injection molding. By inserting the male mold and the female mold, injecting a synthetic resin from the injection molding gate into the injection molding space to obtain a molded product, and then forming the molded product by the injection molding gate. By cutting the formed gate pin, an opening is formed in the center of the bottom of the outer container. It is desirable that the diameter of the opening convex portion is reduced from the base end portion toward the tip end portion.
【０００９】[0009]
【発明の実施の形態】図１および図２は本発明の合成樹
脂製断熱二重壁容器の好適な実施例を示すものであり、
図１は容器全体、図２は外容器の底部中央部を示してい
る。この合成樹脂製断熱容器は、容器１と、容器１の開
口部を覆う蓋２１からなるものである。この容器１は耐
熱水性のポリカーボネート樹脂、ポリプロピレン樹脂、
ＡＢＳ樹脂、ポリエステル樹脂等で射出成形で成形され
た外容器２と内容器３からなり、内外容器の間の空間部
４を断熱層５とする二重壁構造のどんぶり状または椀状
の容器である。1 and 2 show a preferred embodiment of a heat insulating double wall container made of synthetic resin according to the present invention,
FIG. 1 shows the entire container, and FIG. 2 shows the central portion of the bottom of the outer container. The heat insulating container made of synthetic resin includes a container 1 and a lid 21 that covers the opening of the container 1. This container 1 is made of hot water-resistant polycarbonate resin, polypropylene resin,
A bowl-shaped or bowl-shaped container having a double-wall structure, which is composed of an outer container 2 and an inner container 3 formed by injection molding of ABS resin, polyester resin, or the like, and has a space 4 between the inner and outer containers as a heat insulating layer 5. is there.
【００１０】外容器底部８の中央には断熱層５側に凸部
１１が形成され、該凸部の裏面には外容器２の底部壁を
断熱層５側に突出せしめた結果該表面に生ずる凹部１０
が凸部１１の中心と一致させて形成されている。この凸
部１１と凹部１０の形成に伴う外容器底部８の厚みは、
底部壁の肉厚がほぼ均一になるように形成されている。
外容器底部８中央部の肉厚を他の部分の肉厚とほぼ均一
になるように成形すると、外容器底部８の中央部の強度
を損なわないようにすることができ、クーラーボックス
や保温弁当箱等に比べて内外容器の肉厚を薄くしなけれ
ばならない二重壁容器からなる食器の場合に特に有効で
ある。前記凹部１０は封止板９を嵌合接着するためのも
ので、凹部１０の深さは、内外容器と同じ樹脂で形成さ
れる封止板９の厚みと同じになるように形成されてい
る。このような構成により、容器１を組み上げたとき、
容器の底部を平滑にすることが可能となり、外観上も優
れたものとなる。A convex portion 11 is formed on the heat insulating layer 5 side in the center of the outer container bottom portion 8, and a bottom wall of the outer container 2 is formed on the rear surface of the outer container 2 as a result of projecting to the heat insulating layer 5 side. Recess 10
Are formed so as to coincide with the center of the convex portion 11. The thickness of the outer container bottom 8 accompanying the formation of the convex portion 11 and the concave portion 10 is
The bottom wall is formed to have a substantially uniform thickness.
If the thickness of the central portion of the outer container bottom 8 is formed to be substantially equal to the thickness of other portions, the strength of the central portion of the outer container bottom 8 can be prevented from being impaired. This is especially effective in the case of tableware consisting of double-walled containers in which the thickness of the inner and outer containers must be smaller than that of boxes. The recess 10 is for fitting and adhering the sealing plate 9, and the depth of the recess 10 is formed to be the same as the thickness of the sealing plate 9 made of the same resin as the inner and outer containers. . With this configuration, when the container 1 is assembled,
The bottom of the container can be made smooth, resulting in an excellent appearance.
【００１１】外容器底部８の中心、すなわち凹部１０の
中心には、外容器底部８を内外に貫通する開孔部１２が
形成されている。この開孔部１２は、容器１の製造工程
において、内外容器を接合して二重壁容器とした後、低
熱伝導率ガスで置換封入するためのもので、封入後接着
剤で封止されるものである。この開孔部１２の開孔径
は、封止の工程で、接着剤が垂れ落ちないようにするた
めに０．１〜３ｍｍであることが望ましい。At the center of the outer container bottom 8, that is, the center of the recess 10, there is formed an opening 12 that penetrates the outer container bottom 8 in and out. In the manufacturing process of the container 1, the opening 12 is for joining the inner and outer containers into a double-walled container, and then replacing and enclosing with a low thermal conductivity gas, and encapsulating with an adhesive after encapsulation. It is a thing. The opening diameter of the opening 12 is preferably 0.1 to 3 mm in order to prevent the adhesive from dripping during the sealing process.
【００１２】前記外容器２と内容器３は、それぞれの端
部６、７において、振動溶着あるいはスピン溶着などの
方法で、二重壁容器となるように接合されている。この
ように振動溶着あるいはスピン溶着によって接合されて
いるので、内外容器の接合部の密閉度が高く、その接合
強度も大きい。The outer container 2 and the inner container 3 are joined at their ends 6 and 7 by a method such as vibration welding or spin welding so as to form a double-walled container. Since they are joined by vibration welding or spin welding in this manner, the degree of sealing of the joint portion of the inner and outer containers is high and the joint strength is also high.
【００１３】外容器と内容器の間に形成された断熱層に
は、キセノン、クリプトン、アルゴンのうち少なくとも
１種の低熱伝導率ガスが封入されている。これらのガス
の熱伝導度はキセノン（ｋ＝０．５２×１０-2Ｗ・ｍ-1
・Ｋ-1；０℃）、クリプトン（ｋ＝０．８７×１０-2Ｗ
・ｍ-1・Ｋ-1；０℃、アルゴン（ｋ＝１．６３×１０-2
Ｗ・ｍ-1・Ｋ-1；０℃）で、空気（ｋ＝２．４１×１０
-2Ｗ・ｍ-1・ｋ-1；０℃）よりも小さく、これらを単独
で用いたり、２種以上の混合ガスにして用いることがで
きる。これらの低熱伝導率ガスを用いることにより、断
熱性能の高い容器にすることができる。A low thermal conductivity gas of at least one of xenon, krypton, and argon is enclosed in the heat insulating layer formed between the outer container and the inner container. The thermal conductivity of these gases is xenon (k = 0.52 × 10 −2 W · m −1).
・ K -1 ； 0 ℃, krypton (k = 0.87 × 10 -2 W
・ M -1・ K -1 ; 0 ° C, Argon (k = 1.63 × 10 -2
W · m −1 · K −1 ; 0 ° C., air (k = 2.41 × 10)
-2 W · m −1 · k −1 ; 0 ° C.), and these can be used alone or as a mixed gas of two or more kinds. By using these low thermal conductivity gases, a container having high heat insulation performance can be obtained.
【００１４】外容器底部８の開孔部１２は、図２に示す
ように、外容器２の底部外表面の凹部１０側から断熱層
空間の凸部１１側に向けて縮径するように形成されてい
る。ここで凸部１１側の開孔径は、好ましくは０．１〜
３ｍｍ、より好ましくは０．１〜１ｍｍ、また凹部１０
側の開孔径は、好ましくは３〜５ｍｍ、より好ましくは
３〜４ｍｍとする。これは、後述するように、二重壁容
器の製造工程で、二重壁容器を倒置させて低熱伝導率ガ
スを封入し、そのまま接着剤で開孔部を封止するが、そ
の際、開孔部が断熱層空間に向けて縮径していれば、開
孔部１２がロート状となり、接着剤の液滴を上から落下
させても凹部１０側の開孔径が広く形成されるので、接
着剤の液滴を受け易くなり、接着剤による開孔部の封止
が容易になるからである。また、凸部側の開孔径が０．
１〜３ｍｍと狭いので、接着剤の表面張力が働き垂れ落
ちることがない。As shown in FIG. 2, the opening 12 of the bottom 8 of the outer container is formed so that its diameter decreases from the recess 10 side of the outer surface of the bottom of the outer container 2 toward the protrusion 11 of the heat insulating layer space. Has been done. Here, the aperture diameter on the side of the convex portion 11 is preferably 0.1 to
3 mm, more preferably 0.1 to 1 mm, and the recess 10
The side opening diameter is preferably 3 to 5 mm, more preferably 3 to 4 mm. This is because, as will be described later, in the process of manufacturing the double-walled container, the double-walled container is inverted and the low thermal conductivity gas is enclosed, and the opening is sealed with an adhesive as it is. If the diameter of the hole is reduced toward the heat insulating layer space, the hole 12 becomes a funnel shape, and even if the adhesive droplet is dropped from above, the hole diameter on the concave portion 10 side is widened. This is because the droplets of the adhesive can be easily received, and the opening portion can be easily sealed with the adhesive. In addition, the opening diameter on the convex side is 0.
Since it is as narrow as 1 to 3 mm, the surface tension of the adhesive does not work and it does not drip.
【００１５】前記開孔部１２はシアノアクリレート系の
接着剤によって封止されている。この接着剤は気密性が
高く接着部１９にガスバリアー性を付与させることがで
き、かつ瞬間的に強力な接着力が得られるので、二重壁
容器の空間部４に充填された低熱伝導率ガスを効果的に
封止できる。The opening 12 is sealed with a cyanoacrylate adhesive. Since this adhesive has high airtightness and can give a gas barrier property to the adhesive portion 19 and instantaneously gives a strong adhesive force, it has a low thermal conductivity filled in the space portion 4 of the double-walled container. The gas can be effectively sealed.
【００１６】外容器２の凹部１０には封止板９が嵌合接
着されている。すなわち、封止板１２は開孔部１２を接
着剤で封止後、シアノアクリレート系の接着剤を付して
外容器２の凹部１０に嵌合接着されたものであり、これ
により接着部１９が外部より保護される。また、凹部１
０に封止板９が嵌合接着されるので、二重壁容器製造の
際に封止板９の位置決めも容易になり、封止板９が位置
ズレすることもない。A sealing plate 9 is fitted and adhered to the recess 10 of the outer container 2. That is, the sealing plate 12 is obtained by sealing the opening 12 with an adhesive, and then fitting and bonding the cyanoacrylate adhesive to the recess 10 of the outer container 2, whereby the adhesive 19 Is protected from the outside. Also, the recess 1
Since the sealing plate 9 is fitted and adhered to 0, positioning of the sealing plate 9 is facilitated at the time of manufacturing the double-walled container, and the sealing plate 9 is not displaced.
【００１７】内容器３と外容器２の空間部４に面する裏
面には、少なくとも内容器３の表面に金属製の輻射防止
材１８が設けられており、これにより合成樹脂製断熱二
重壁容器の輻射伝熱を抑えることができる。さらに外容
器の内面にも輻射防止材１８を設けておけば、輻射伝熱
をより少なくすることができる。前記輻射防止材１８と
しては、メッキ膜、アルミ膜、銅箔、銀箔のうちから選
ばれた１種が用いられる。アルミ箔、銅箔、銀箔の箔
は、接着剤や両面テープにより取り付けることができ、
安価にしかも簡易に取り付けることができる。また、メ
ッキ膜は化学メッキの上に電気メッキで付けられる。メ
ッキ膜の場合は輻射伝熱の低減化に加えて、ガスバリア
ー性を高めるという利点もある。A metal radiation preventive material 18 is provided on at least the surface of the inner container 3 on the back surface of the inner container 3 and the space facing the space portion 4 of the outer container 2, whereby a heat insulating double wall made of synthetic resin is provided. The radiant heat transfer of the container can be suppressed. Further, if the radiation preventing material 18 is provided on the inner surface of the outer container, the radiation heat transfer can be further reduced. As the radiation preventing material 18, one kind selected from a plating film, an aluminum film, a copper foil, and a silver foil is used. Aluminum foil, copper foil, and silver foil can be attached with adhesive or double-sided tape,
It can be installed inexpensively and easily. The plating film is electroplated on the chemical plating. In the case of a plated film, in addition to the reduction of radiative heat transfer, there is an advantage that the gas barrier property is enhanced.
【００１８】このように形成された容器１の開口部は、
蓋２１によって容器開口部内部で係合可能に覆われるよ
うになっている。蓋２１は、下面壁２２と上面壁２３か
らなり、上、下面壁で形成される空間には発泡スチロー
ル、ウレタン等で形成された断熱材２４が挿入され、密
閉構造になるようにして接合されたものである。また上
面壁２３にはツマミ２５となる凸部が形成されている。
このような蓋２１を容器１にかぶせることにより、容器
１の保温効果を高めることができる。The opening of the container 1 thus formed is
The lid 21 covers the inside of the container opening so that the container 21 can be engaged. The lid 21 is composed of a lower surface wall 22 and an upper surface wall 23, and a heat insulating material 24 made of styrofoam, urethane or the like is inserted into a space formed by the upper and lower surface walls, and joined so as to form a closed structure. It is a thing. Further, the upper surface wall 23 is formed with a convex portion that becomes the knob 25.
By covering the container 1 with such a lid 21, the heat retaining effect of the container 1 can be enhanced.
【００１９】次に図３および図４を用いて、本発明の合
成樹脂製断熱二重壁容器の外容器の成形方法を説明す
る。図３は、外容器の射出成形のために形成される型を
示したものである。図３に示すように、外容器２を射出
成形するために、外容器２の内表面を形成する雄型１５
と、外容器２の外表面を形成する雌型１３を用いて、以
下のように、射出成形用空間部１７を形成する。Next, a method of molding the outer container of the heat insulating double wall container made of synthetic resin of the present invention will be described with reference to FIGS. 3 and 4. FIG. 3 shows a mold formed for injection molding of an outer container. As shown in FIG. 3, a male mold 15 that forms the inner surface of the outer container 2 for injection molding the outer container 2.
Then, the female mold 13 forming the outer surface of the outer container 2 is used to form the injection molding space 17 as follows.
【００２０】まず、雄型１５の射出成形面には、外容器
２の凸部１１を形成するべく、その対応する位置に成形
用凹部１５ａを形成しておく。また、雌型１３の射出成
形面には、外容器２の凹部１０を形成するべく、その対
応する位置に成形用凸部１３ａを形成しておく。そし
て、雌型１３の成形用凸部１３ａ中央には、外容器２の
底部壁を貫通させて底部壁の中央に開孔部１２を形成す
る開孔用凸部１４を形成しておく。この開孔用凸部１４
は、外容器２の開孔部１２近傍の底部壁の肉厚よりも長
くなるように形成され、かつ基端部１４ａから先端部１
４ｂに向けて縮径して形成されている。First, in order to form the convex portion 11 of the outer container 2 on the injection molding surface of the male mold 15, a molding concave portion 15a is formed at the corresponding position. Further, on the injection molding surface of the female mold 13, in order to form the concave portion 10 of the outer container 2, a molding convex portion 13a is formed at a corresponding position. Then, in the center of the molding convex portion 13a of the female mold 13, an opening convex portion 14 that penetrates the bottom wall of the outer container 2 and forms the opening portion 12 in the center of the bottom wall is formed. This opening convex portion 14
Is formed so as to be longer than the wall thickness of the bottom wall in the vicinity of the opening 12 of the outer container 2, and from the base end 14a to the tip 1
The diameter is reduced toward 4b.
【００２１】そして雄型１５の成形用凹部１５ａの中央
位置には雌型１３の開孔用凸部１４の径よりも大きい径
を有する射出成形用ゲート１６を設け、この射出成形用
ゲート１６内に雌型１３の開孔用凸部１４の先端を挿入
しながら、雄型１５と雌型１３の接合面（図示せず）を
合わせて射出成形用空間部１７を形成する。ここで雄型
１５と成形用凹部１５ａと成形用凸部１３ａとの間の射
出成形用空間部１７は、外容器底部８の中央部を形成す
るためのものであるが、外容器底部８全体の肉厚が一様
になるように、空間部の厚みは均一となるようにする。An injection molding gate 16 having a diameter larger than that of the opening convex portion 14 of the female die 13 is provided at the center of the molding concave portion 15a of the male die 15, and the inside of the injection molding gate 16 is provided. While inserting the tip of the opening convex portion 14 of the female mold 13, the joining surface (not shown) of the male mold 15 and the female mold 13 is aligned to form the injection molding space 17. Here, the injection molding space 17 between the male mold 15, the molding concave portion 15a and the molding convex portion 13a is for forming the central portion of the outer container bottom portion 8, but the outer container bottom portion 8 as a whole. The thickness of the space should be uniform so that the thickness of the space is uniform.
【００２２】次いで、図４に示すように、射出成形用ゲ
ート１６から射出成形用空間部１７に合成樹脂を供給し
て外容器２を成形する。次いで、外容器２の成形品には
射出成形用ゲート１６によって付随したゲートピン２０
をゲートカットすることにより外容器底部８に開孔部１
２を形成し、外容器２を完成させる。Next, as shown in FIG. 4, a synthetic resin is supplied from the injection molding gate 16 to the injection molding space 17 to mold the outer container 2. Next, a gate pin 20 attached to the molded product of the outer container 2 by the injection molding gate 16.
Opening the opening 1 in the bottom 8 of the outer container by gate cutting
2 is formed, and the outer container 2 is completed.
【００２３】このように、本発明の外容器の成形方法で
は、開孔部形成のための特別な穴開け加工が不要とな
る。また、雄型１５側の中心位置、すなわち雄型１５の
射出成形面の成形用凹部１６の中心位置に射出成形用ゲ
ート１６を設けたので、左右対称である外容器２を形成
する際に、射出成形用空間部１７への合成樹脂の流れ込
みに偏りが無くなり、ウエルドの不良や偏心、歪み等の
外観不良や強度不足の発生が極端に少なくなる。しか
も、ゲートカット位置が外容器２の内面側であるので、
外容器２と内容器３を組み上げたときゲートカット部が
外部から見えなくなり外観上都合が良い。また、断熱層
側に凸部１１が形成され、外容器底部８の他の部位より
も上げ底になっているので、ゲートカット作業がやり易
くなる。As described above, the outer container molding method of the present invention does not require a special hole forming process for forming the opening. Further, since the injection molding gate 16 is provided at the center position on the male mold 15 side, that is, the center position of the molding recess 16 on the injection molding surface of the male mold 15, when forming the outer container 2 which is symmetrical, There is no bias in the flow of the synthetic resin into the injection molding space 17, and the appearance defects such as weld defects, eccentricity, and distortion, and the occurrence of insufficient strength are extremely reduced. Moreover, since the gate cut position is on the inner surface side of the outer container 2,
When the outer container 2 and the inner container 3 are assembled, the gate cut portion is not visible from the outside, which is convenient in appearance. Further, since the convex portion 11 is formed on the heat insulating layer side and has a raised bottom as compared with other portions of the outer container bottom portion 8, the gate cutting work is facilitated.
【００２４】一方、内容器３の成形に当たっては、内容
器３の外面の底部中心に射出成形用ゲートを設けておけ
ば特に成形上の問題はない。上述のように、外容器２と
内容器３を成形後、外容器２の内面と内容器３の外面
に、金属からなる輻射防止材１８を形成する。輻射防止
材１８は、銅や銀等により化学メッキの上に電気メッキ
を施すか、アルミ箔、銅箔、銀箔のいずれか１つの箔を
接着剤あるいは両面テープで貼着する。その後、外容器
２と内容器３のそれぞれの口部６、７を振動容着または
スピン溶着で接合して二重壁容器を形成する。ついでこ
の二重壁容器を倒立させ、内外容器の間の空間部４にキ
セノン、クリプトン、アルゴンのうち少なくとも１種の
ガスを充填した後、二重壁容器を倒立させたまま開孔部
１２をシアノアクリレート系の接着剤で封止する。On the other hand, in molding the inner container 3, if an injection molding gate is provided at the center of the bottom of the outer surface of the inner container 3, there is no particular problem in molding. As described above, after forming the outer container 2 and the inner container 3, the radiation preventing material 18 made of metal is formed on the inner surface of the outer container 2 and the outer surface of the inner container 3. The radiation prevention material 18 is formed by electroplating chemical plating with copper, silver, or the like, or by adhering any one of aluminum foil, copper foil, and silver foil with an adhesive or a double-sided tape. Then, the mouth portions 6 and 7 of the outer container 2 and the inner container 3 are joined by vibration welding or spin welding to form a double-walled container. Then, the double-walled container is inverted, the space 4 between the inner and outer containers is filled with at least one gas selected from xenon, krypton, and argon, and then the opening 12 is opened while the double-walled container is inverted. Seal with a cyanoacrylate adhesive.
【００２５】上述したように、外容器２の開孔部１２を
形成する雌型１３の開孔用凸部１４は、基端部１４ａか
ら先端部１４ｂに向けて縮径して形成され、開孔用凸部
１３ａの上面に設けられる。したがって、外容器２の開
孔部１２は、外表面の凹部１０側から内表面の凸部１１
側に向けて縮径された構造となる。したがって開孔部１
２に接着剤の液滴を垂らしても凹部１０側の開孔径が大
きいので、接着剤が開孔部１２に取り込まれ易くなり、
開孔部の封止作業が簡易になる。この開孔部において、
凸部１１側の開孔径を０．１〜３ｍｍとしたとき、凹部
１０側の開孔径を３〜５ｍｍにするのが好ましく、さら
に凸部１１側の開孔径を０．１〜１ｍｍとしたとき、凹
部１０側の開孔径を３〜４ｍｍにするのがより好まし
い。As described above, the opening convex portion 14 of the female die 13 forming the opening portion 12 of the outer container 2 is formed by reducing the diameter from the base end portion 14a toward the tip end portion 14b. It is provided on the upper surface of the hole protrusion 13a. Therefore, the opening portion 12 of the outer container 2 is formed from the concave portion 10 side of the outer surface to the convex portion 11 of the inner surface.
The structure is reduced in diameter toward the side. Therefore, the opening 1
Even if a droplet of adhesive is dripped on 2, the diameter of the opening on the side of the recess 10 is large, so that the adhesive is easily taken into the opening 12,
The work of sealing the opening is simplified. In this opening,
When the opening diameter on the convex portion 11 side is 0.1 to 3 mm, the opening diameter on the concave portion 10 side is preferably 3 to 5 mm, and when the opening diameter on the convex portion 11 side is 0.1 to 1 mm. More preferably, the opening diameter on the side of the recess 10 is 3 to 4 mm.
【００２６】こうして得られた容器１は、断熱性能が優
れている上、強度的にも外観的にも優れたものとなる。The container 1 obtained in this manner has excellent heat insulation performance and is excellent in strength and appearance.
【００２７】[0027]
【実施例】図１および図２に示すような構造の容器１を
形成する外容器２、内容器３を耐熱水性のポリカーボネ
ートを用いてそれぞれ射出成形により製作した。まず外
容器２の形成の際、外容器底部８の中央に凸部１１と凹
部１０を形成し、凹部１０の径が１０ｍｍとし、外容器
底部８の肉厚がほぼ一様になるようにした。また、外容
器底部８の中央に開孔部１２の凸部１１側の径を１ｍｍ
とし、凹部１０側の径を３ｍｍとして凹部１０側から凸
部１１側に向けて縮径した開孔部１２を形成した。EXAMPLE An outer container 2 and an inner container 3 forming a container 1 having a structure as shown in FIGS. 1 and 2 were manufactured by injection molding using heat resistant water-resistant polycarbonate. First, when forming the outer container 2, a convex portion 11 and a concave portion 10 are formed in the center of the outer container bottom portion 8, the diameter of the concave portion 10 is set to 10 mm, and the thickness of the outer container bottom portion 8 is made substantially uniform. . Further, the diameter of the opening portion 12 on the side of the convex portion 11 is 1 mm at the center of the bottom portion 8 of the outer container.
Then, the diameter of the concave portion 10 side was set to 3 mm, and the opening portion 12 having a diameter reduced from the concave portion 10 side toward the convex portion 11 side was formed.
【００２８】この開孔部１２を形成するに当たり、雌型
１３の開孔用凸部１４の先端部１４ｂは、雄型１５の射
出成形用ゲート１６内に２〜３ｍｍ挿入できるようにす
る。そして、雄型１５に射出成形用ゲート１６をゲート
径４ｍｍにして設けた。そして、雄型１５の射出成形用
ゲート１６内に雌型１３の開孔用凸部１４の先端を挿入
し、雄型１５と雌型１３の接合面を合わせ、射出成形用
空間部１７に合成樹脂を射出し外容器２を成形した。外
容器２の内面中央には成形後ゲートピンが付随するの
で、このゲートピンをカットすることにより、開孔部１
２を形成した。次に内容器３は、内容器３の内表面を形
成する雄型と外表面を形成する雌型を用い、雌型側の内
容器３の底部の中心に対応する位置に射出成形用ゲート
を設けて形成した。In forming the opening 12, the tip 14b of the opening projection 14 of the female die 13 is inserted into the injection molding gate 16 of the male die 2 to 3 mm. Then, the injection molding gate 16 was provided on the male mold 15 with a gate diameter of 4 mm. Then, the tip of the opening convex portion 14 of the female die 13 is inserted into the injection molding gate 16 of the male die 15, the joining surfaces of the male die 15 and the female die 13 are aligned, and the injection molding space 17 is combined. The resin was injected to mold the outer container 2. Since the gate pin is attached to the center of the inner surface of the outer container 2 after molding, the opening portion 1 can be formed by cutting the gate pin.
Formed 2. Next, as the inner container 3, a male mold that forms the inner surface of the inner container 3 and a female mold that forms the outer surface are used, and an injection molding gate is provided at a position corresponding to the center of the bottom of the inner container 3 on the female mold side. It was provided and formed.
【００２９】続いて、外容器２の内表面と内容器３の外
表面に輻射伝熱低減とガスバリア性付与の目的で銅メッ
キを施した。その後、外容器２と内容器３をそれぞれの
口部６、７で振動溶着法により接合一体化し、容器１を
得た。次いでこの容器１を倒置し、真空ポンプに連通し
た排気管路とクリプトンガス供給管路とが切り替え可能
に接続された接続管路の先端にパッキンを備えたガス置
換封入封止装置を用い、該接続管路の先端のパッキンを
容器の開孔部１２周辺に押し付けた状態で、開孔部１２
から空間部４内の空気を真空排気し、その後空間部４に
クリプトンガスを大気圧程度の封入圧力となるように封
入した。そして、その直後にシアノアクリレート系の接
着剤を開孔部１２に垂らし、かつ凹部１０に接着剤を塗
布すると同時に封止板９を嵌合接着し封止を完了した。
以上のように作製した容器１は、製作不良がほとんど発
生せず製造コストが小さい上に強度的外観的に優れ、耐
久的性も備え断熱性能の高い容器１を得ることができ
た。Subsequently, the inner surface of the outer container 2 and the outer surface of the inner container 3 were plated with copper for the purpose of reducing radiant heat transfer and imparting gas barrier properties. After that, the outer container 2 and the inner container 3 were joined and integrated by the vibration welding method at the respective mouth portions 6 and 7 to obtain the container 1. Then, the container 1 is inverted, and a gas displacement encapsulating and sealing device having a packing at the tip of a connection pipe line in which an exhaust pipe line communicating with a vacuum pump and a krypton gas supply pipe line are switchably connected is used. With the packing at the tip of the connection conduit pressed against the periphery of the opening 12 of the container, open the opening 12
Then, the air in the space 4 was evacuated, and then the krypton gas was sealed in the space 4 so that the sealing pressure was about atmospheric pressure. Immediately after that, a cyanoacrylate adhesive was dripped into the opening 12, and the recess 10 was coated with the adhesive. At the same time, the sealing plate 9 was fitted and adhered to complete the sealing.
With the container 1 manufactured as described above, it was possible to obtain a container 1 with high heat insulation performance, which had few manufacturing defects, a small manufacturing cost, excellent strength and appearance, and durability.
【００３０】（断熱性能の確認）得られた容器１に９５
℃の湯を入れ、発泡ポレスチレンからなる断熱材を充填
した蓋をかぶせて放置し、１時間後の湯温を測定した結
果、７５℃であった。(Confirmation of heat insulation performance) 95 in the obtained container 1
It was 75 ° C. as a result of pouring hot water at 0 ° C., covering it with a lid filled with a heat insulating material made of expanded polystyrene, and leaving it for 1 hour, and then measuring the hot water temperature.
【００３１】[0031]
【発明の効果】本発明によれば、外容器の底部中央部の
断熱層側に凸部を形成してなるとともに、この凸部の裏
面に凸部の中心と一致させて凹部が形成されるので、外
容器底部中央の肉厚を他部の肉厚と同等にでき、外容器
の底部、とりわけ、開孔の周囲の強度を高めることがで
きるとともに、封止板を凹部に嵌合させて封止すること
ができる。また、断熱層となる空間部にキセノン、クリ
プトン、アルゴンのうちの少なくとも１種からなる低熱
伝導率ガスが封入されてなるので断熱性能の高い合成樹
脂製断熱二重壁容器とすることができる。According to the present invention, a convex portion is formed on the heat insulating layer side at the center of the bottom of the outer container, and a concave portion is formed on the back surface of the convex portion so as to coincide with the center of the convex portion. Therefore, the thickness of the center of the bottom of the outer container can be made equal to the thickness of other parts, and the strength of the bottom of the outer container, in particular, the periphery of the opening can be increased, and the sealing plate can be fitted into the recess. It can be sealed. In addition, since the low thermal conductivity gas made of at least one of xenon, krypton, and argon is enclosed in the space part which becomes the heat insulating layer, the heat insulating double wall container made of synthetic resin can have high heat insulating performance.
【００３２】また、外用器の凹部に封止板を嵌合接着す
るので、開孔部を接着剤で封止後、封止板により開孔部
を保護することにができる。さらに、外容器の底部外表
面の凹部側から断熱層空間の凸部側に向けて開孔部が縮
径してなるとともに、該開孔部が接着剤で封止されてな
ることにより、合成樹脂製断熱二重壁容器の封止の際、
二重壁容器を倒置して封止するが、開孔部が外容器の底
部外表面の凹部側から断熱層空間の凸部側に向けて縮径
してなるので、外容器の底部外表面側の開孔径が広くな
り、接着剤の受けが良くなり接着剤による開孔部の封止
が容易になる。Further, since the sealing plate is fitted and adhered to the concave portion of the external device, it is possible to protect the opening portion with the sealing plate after sealing the opening portion with the adhesive. Furthermore, the diameter of the opening is reduced from the concave side of the outer surface of the bottom of the outer container toward the convex side of the heat insulating layer space, and the opening is sealed with an adhesive to form a composite. When sealing a resin insulated double-walled container,
The double-walled container is inverted and sealed, but since the diameter of the opening is reduced from the concave side of the outer surface of the bottom of the outer container toward the convex side of the heat insulation layer space, the outer surface of the bottom of the outer container is reduced. The opening diameter on the side is widened, the receiving of the adhesive is improved, and the opening is easily sealed with the adhesive.
【００３３】また、接着剤がシアノアクリレート系の接
着剤とすることにより、気密性が高くかつ瞬間的に強力
な接着力が得られるので、二重壁容器の空間部に充填さ
れた断熱性のガスの封止が可能となる。さらに、合成樹
脂製断熱二重壁容器を形成する内容器と外容器の空間部
に面する裏面のうち少なくとも内容器の表面に金属より
なる輻射防止材を形成することにより、合成樹脂製断熱
二重壁容器の輻射電熱を抑えることができ、断熱性能を
高くすることができる。また、外容器の内面にも輻射防
止材を設けておけば、輻射伝熱のさらなる低減が可能と
なる。また、輻射防止材をメッキ膜、アルミ箔、銅箔、
銀箔のうちの１種とすることにより、輻射防止材を安価
にしかも簡易に取り付けることができる。輻射防止材を
メッキ膜にすると、輻射伝熱の低減の他にガスバリアー
性を高めることができる。Further, when the adhesive is a cyanoacrylate adhesive, high airtightness and instantaneously strong adhesive force can be obtained, so that the heat insulating property filled in the space of the double-walled container is improved. Gas can be sealed. Further, by forming a radiation preventive material made of metal on at least the surface of the inner container among the back surfaces facing the space of the inner container and the outer container forming the heat insulating double-wall container made of synthetic resin, the heat insulating synthetic resin The radiant heat of the heavy-walled container can be suppressed, and the heat insulation performance can be improved. Further, if the radiation preventing material is provided on the inner surface of the outer container, the radiation heat transfer can be further reduced. In addition, radiation prevention material is plated film, aluminum foil, copper foil,
By using one of the silver foils, the radiation prevention material can be attached inexpensively and easily. When the radiation prevention material is a plated film, it is possible to enhance the gas barrier property in addition to reducing the radiation heat transfer.
【００３４】また、本発明に係る外容器の成形方法によ
れば、外容器の底部の中心に対応する位置、すなわち雄
型の成形用凹部の中央部に射出成形用ゲートを設けたの
で、左右対称である外容器の底部の中心から射出成形で
き、金型の成形空間への合成樹脂の流れ込みを均一にす
ることができ、ウエルドの不良や偏心、歪み等の外観不
良や強度不足の発生を極端に少なくすることができ、不
良率を低下させることができる。According to the outer container molding method of the present invention, the injection molding gate is provided at a position corresponding to the center of the bottom of the outer container, that is, at the center of the male molding recess. Injection molding can be performed from the center of the bottom of the outer container, which is symmetrical, and it is possible to make the flow of synthetic resin into the molding space of the mold uniform, resulting in poor weld appearance, eccentricity, distortion, and other poor appearance and insufficient strength. It can be extremely reduced and the defect rate can be reduced.
【００３５】また、径の大きな射出成形用ゲート内に径
の小さな開孔用凸部の先端を挿入して、射出成形用空間
部に射出成形用ゲートから合成樹脂を射出して成形する
ので、ゲートピンをカットすれば容易に開孔部が得ら
れ、ドリル等による別段の穴開け加工が不要となる。さ
らに、雌型の開孔用凸部が基端部から先端部に向けて縮
径することにより、外容器の開孔部は、外表面の凹部側
から内表面の凸部側に向けて縮径するように成形するこ
とができ、外容器と内容器を接合して形成した二重壁容
器を倒立させて開孔部を接着剤封止する際、接着剤が開
孔部に取り込まれ易くなり、開孔部の封止作業が簡易に
なる。Further, since the tip of the small-diameter opening convex portion is inserted into the large-diameter injection molding gate and the synthetic resin is injected from the injection-molding gate into the injection-molding space, molding is performed. If the gate pin is cut, the opening can be easily obtained, and there is no need for a special drilling process such as drilling. Further, since the female opening convex portion is reduced in diameter from the base end portion toward the distal end portion, the opening portion of the outer container is contracted from the concave portion side of the outer surface toward the convex portion side of the inner surface. It can be molded to have a diameter, and when the double-walled container formed by joining the outer container and the inner container is inverted and the opening is sealed with an adhesive, the adhesive is easily taken into the opening. As a result, the work of sealing the opening is simplified.
【図１】 本発明の合成樹脂製断熱二重壁容器の一実施
例を示す断面図である。FIG. 1 is a cross-sectional view showing one embodiment of a synthetic resin heat insulating double-walled container of the present invention.
【図２】 本発明の合成樹脂製断熱二重壁容器の一実施
例を示すもので、外容器の底部中央部の断面図である。FIG. 2 is a cross-sectional view of the central part of the bottom of the outer container, showing an embodiment of the heat-insulating double-walled container made of synthetic resin of the present invention.
【図３】 本発明の合成樹脂製断熱二重壁容器の外容器
の製造方法の一実施例を示す断面図である。FIG. 3 is a cross-sectional view showing an embodiment of a method for manufacturing an outer container of a heat insulating double wall container made of synthetic resin according to the present invention.
【図４】 本発明の合成樹脂製断熱二重壁容器の外容器
の製造方法の一実施例を示す断面図である。FIG. 4 is a cross-sectional view showing an embodiment of a method for manufacturing an outer container of a heat insulating double wall container made of synthetic resin according to the present invention.
１…容器、２…外容器、３…内容器、４…空間部、５…
断熱層、６…外容器口部、７…内容器口部、８…外容器
底部、９…封止板、１０…凹部、１１…凸部、１２…開
孔部、１３…雌型、１３ａ…成形用凸部、１４…開孔用
凸部、１４ａ…基端部、１４ｂ…先端部、１５…雄型、
１５ａ…成形用凹部、１６…射出成形用ゲート、１７…
射出成形用空間部、１８…輻射防止材、１９…接着部、
２０…ゲートピン1 ... container, 2 ... outer container, 3 ... inner container, 4 ... space part, 5 ...
Heat-insulating layer, 6 ... Outer container opening, 7 ... Inner container opening, 8 ... Outer container bottom, 9 ... Sealing plate, 10 ... Recess, 11 ... Projection, 12 ... Open hole, 13 ... Female mold, 13a ... Projection for molding, 14 ... Projection for opening, 14a ... Base end, 14b ... Tip, 15 ... Male mold,
15a ... Recess for molding, 16 ... Gate for injection molding, 17 ...
Space for injection molding, 18 ... Radiation prevention material, 19 ... Adhesive part,
20 ... Gate pin
───────────────────────────────────────────────────── フロントページの続き (72)発明者 田中 篤彦 東京都港区西新橋１丁目16番７号 日本酸 素株式会社内 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Atsuhiko Tanaka 1-16-7 Nishi-Shimbashi, Minato-ku, Tokyo Nihon Oxido Co., Ltd.
Claims (7)
れの口部で連結して内容器を外容器内に空間を隔てて収
容して二重壁容器となし、前記内容器と外容器とで形成
した空間部を断熱層としてなる合成樹脂製断熱二重壁容
器において、 前記外容器の底部中央部に、底部壁肉厚がほぼ均一とな
るようにして、外側表面に凹部、断熱層側表面に凸部を
備えた段部が設けられ、 該段部の中心に底部壁を貫通する開孔部を設けてなると
ともに、 前記空間部にキセノン、クリプトン、アルゴンのうちの
少なくとも１種からなる低熱伝導率ガスが封入され、 前記凹部に封止板を配して前記開孔部を封じてなること
を特徴とする合成樹脂製断熱二重壁容器。1. A double-walled container in which a synthetic resin inner container and an outer container are connected at their mouths to accommodate the inner container with a space in between to form a double-walled container. In a heat-insulating double-walled synthetic resin container made of a space formed by a container as a heat insulating layer, a concave portion is formed on the outer surface of the outer container so that the thickness of the bottom wall is substantially uniform in the center of the bottom of the outer container. A step portion provided with a convex portion is provided on the layer-side surface, and an opening portion penetrating the bottom wall is provided at the center of the step portion, and at least one of xenon, krypton, and argon is provided in the space portion. A heat-insulating double-walled container made of synthetic resin, characterized in that a low-thermal-conductivity gas consisting of (1) is enclosed, and a sealing plate is arranged in the recess to seal the opening.
の凹部側から断熱層空間の凸部側に向けて縮径してなる
とともに、前記開孔部が接着剤で封止されてなることを
特徴とする請求項１記載の合成樹脂製断熱二重壁容器。2. The diameter of the opening is reduced from the concave side of the outer surface of the bottom of the outer container toward the convex side of the heat insulating layer space, and the opening is sealed with an adhesive. The heat-insulating double-walled container made of synthetic resin according to claim 1, wherein
着剤であることを特徴とする請求項２記載の合成樹脂製
断熱二重壁容器。3. The heat insulating double-walled container made of synthetic resin according to claim 2, wherein the adhesive is a cyanoacrylate adhesive.
容器と外容器の空間部に面する表面のうち少なくとも内
容器の表面に金属製の輻射防止材が設けられてなること
を特徴とする請求項１から３のうちのいずれか１項記載
の合成樹脂製断熱二重壁容器。4. A radiation prevention material made of metal is provided on at least the surface of the inner container among the surfaces facing the space of the inner container and the outer container forming the heat insulating double-walled container made of synthetic resin. The heat insulating double wall container made of synthetic resin according to any one of claims 1 to 3.
銅箔、銀箔のうちの１種であることを特徴とする請求項
４記載の合成樹脂製断熱二重壁容器。5. The radiation preventing material is a plated film, an aluminum foil,
The heat-insulating double-walled container made of synthetic resin according to claim 4, which is one of copper foil and silver foil.
れの口部で連結して内容器を外容器内に空間を隔てて収
容して二重壁容器を形成してなる合成樹脂製断熱二重壁
容器の外容器を、雄型と雌型からなる金型内に形成され
た射出成形用空間部の内部に射出成形用ゲートから合成
樹脂を射出して成形する方法において、 外容器の内表面を形成するための雄型には、外容器の底
部壁中央部に対応する射出成形面に成形用凹部を設け、
かつ該成形用凹部の中央部に射出成形用ゲートを設け、 外容器の外表面を形成するための雌型には、前記雄型に
成形用凹部を形成したことにより凸部が形成されるよう
に、その射出成形面に成形用凸部を設け、かつその径が
前記射出成形用ゲート径よりも小さく、その長さが前記
射出成形用空間部厚みより長くなるように、該成形用凸
部の中央に開孔用凸部を設け、 次いで前記射出成形用ゲート内に前記開孔用凸部の先端
を挿入するようにして、前記雄型と前記雌型を組み合わ
せ、前記射出成形用空間部に前記射出成形用ゲートから
合成樹脂を射出して成形品を得た後、 前記射出成形用ゲートによって形成されたゲートピンを
切断することにより、前記外容器の底部中央部に開孔部
を形成することを特徴とする合成樹脂製断熱二重壁容器
の外容器の成形方法。6. A synthetic resin formed by connecting an inner container made of synthetic resin and an outer container at respective mouths to accommodate the inner container in the outer container with a space therebetween to form a double-walled container. A method for molding an outer container of a heat-insulating double-walled container by injecting a synthetic resin from an injection molding gate into a space for injection molding formed in a mold composed of a male mold and a female mold. The male mold for forming the inner surface of the is provided with a molding recess on the injection molding surface corresponding to the center of the bottom wall of the outer container,
An injection molding gate is provided in the center of the molding recess, and a convex portion is formed in the female mold for forming the outer surface of the outer container by forming the molding recess in the male mold. , A molding convex portion is provided on the injection molding surface, the diameter thereof is smaller than the injection molding gate diameter, and the length thereof is longer than the injection molding space portion thickness. A convex portion for opening is provided in the center of the injection molding space, and then the tip of the convex portion for opening is inserted into the injection molding gate to combine the male mold and the female mold to form the injection molding space. A synthetic resin is injected from the injection molding gate to obtain a molded product, and then the gate pin formed by the injection molding gate is cut to form an opening in the center of the bottom of the outer container. Of a synthetic resin insulated double-walled container characterized by Method of molding a container.
けて縮径することを特徴とする請求項６記載の合成樹脂
製断熱二重壁容器の外容器の成形方法。7. The method for molding an outer container for a synthetic resin heat-insulating double-walled container according to claim 6, wherein the opening convex portion is reduced in diameter from the base end portion toward the tip end portion.
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7260551A JP2920095B2 (en) | 1995-10-06 | 1995-10-06 | Synthetic resin insulated double-walled container and method of forming outer container thereof |
| KR1019960038263A KR100260956B1 (en) | 1995-09-13 | 1996-09-04 | Plastic insulating double wall receptacle and cover |
| DE1996613920 DE69613920T2 (en) | 1995-09-13 | 1996-09-10 | Heat-insulated, double-walled synthetic resin container and heat-insulated, double-walled synthetic resin lid |
| US08/710,056 US5904264A (en) | 1995-09-13 | 1996-09-10 | Thermally insulated double-walled synthetic resin container and thermally insulated double-walled synthetic resin lid |
| EP19960114453 EP0763483B1 (en) | 1995-09-13 | 1996-09-10 | Thermally insulated double-walled synthetic resin container and thermally insulated double-walled synthetic resin lid |
| CA 2185298 CA2185298A1 (en) | 1995-09-13 | 1996-09-11 | Thermally insulated double-walled synthetic resin container and thermally insulated double-walled synthetic resin lid |
| CN96122043A CN1158235A (en) | 1995-09-13 | 1996-09-13 | Synthetic resin adiabatic two-layered wall vessel and cover made of the same |
| US08/931,186 US6036801A (en) | 1995-09-13 | 1997-09-16 | Method for producing a thermally insulated double-walled synthetic resin container and lid |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7260551A JP2920095B2 (en) | 1995-10-06 | 1995-10-06 | Synthetic resin insulated double-walled container and method of forming outer container thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0998892A true JPH0998892A (en) | 1997-04-15 |
| JP2920095B2 JP2920095B2 (en) | 1999-07-19 |
Family
ID=17349535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7260551A Expired - Fee Related JP2920095B2 (en) | 1995-09-13 | 1995-10-06 | Synthetic resin insulated double-walled container and method of forming outer container thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2920095B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998022007A1 (en) * | 1996-11-22 | 1998-05-28 | Nippon Sanso Corporation | Synthetic resin adiabatic container and synthetic resin adiabatic cover |
| JP2002282110A (en) * | 2001-03-22 | 2002-10-02 | Nippon Sanso Corp | Thermally insulated container |
| CN100420412C (en) * | 2000-04-12 | 2008-09-24 | 日本酸素株式会社 | Heat insulating container |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5982834B2 (en) * | 2012-01-24 | 2016-08-31 | タイガー魔法瓶株式会社 | Vacuum double container for soup insulation |
-
1995
- 1995-10-06 JP JP7260551A patent/JP2920095B2/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1998022007A1 (en) * | 1996-11-22 | 1998-05-28 | Nippon Sanso Corporation | Synthetic resin adiabatic container and synthetic resin adiabatic cover |
| US6152319A (en) * | 1996-11-22 | 2000-11-28 | Nippon Sanso Corporation | Thermally insulated synthetic resin container and thermally insulated synthetic resin lid |
| CN100420412C (en) * | 2000-04-12 | 2008-09-24 | 日本酸素株式会社 | Heat insulating container |
| JP2002282110A (en) * | 2001-03-22 | 2002-10-02 | Nippon Sanso Corp | Thermally insulated container |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2920095B2 (en) | 1999-07-19 |
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