JPH0833560A - Cooking container for electromagnetic induction heating - Google Patents
Cooking container for electromagnetic induction heatingInfo
- Publication number
- JPH0833560A JPH0833560A JP17116294A JP17116294A JPH0833560A JP H0833560 A JPH0833560 A JP H0833560A JP 17116294 A JP17116294 A JP 17116294A JP 17116294 A JP17116294 A JP 17116294A JP H0833560 A JPH0833560 A JP H0833560A
- Authority
- JP
- Japan
- Prior art keywords
- container
- cooking container
- metal material
- cooking
- magnetic metal
- 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
- 238000010411 cooking Methods 0.000 title claims abstract description 69
- 238000010438 heat treatment Methods 0.000 title claims abstract description 14
- 230000005674 electromagnetic induction Effects 0.000 title claims abstract description 13
- 239000007769 metal material Substances 0.000 claims abstract description 28
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 16
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 16
- 238000000465 moulding Methods 0.000 abstract description 8
- 230000006698 induction Effects 0.000 description 9
- 230000007547 defect Effects 0.000 description 7
- 238000004519 manufacturing process Methods 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 241000209094 Oryza Species 0.000 description 5
- 235000007164 Oryza sativa Nutrition 0.000 description 5
- 235000009566 rice Nutrition 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 4
- 238000001816 cooling Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000005266 casting Methods 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 239000010935 stainless steel Substances 0.000 description 2
- 229910000838 Al alloy Inorganic materials 0.000 description 1
- VRAIHTAYLFXSJJ-UHFFFAOYSA-N alumane Chemical compound [AlH3].[AlH3] VRAIHTAYLFXSJJ-UHFFFAOYSA-N 0.000 description 1
- 230000000740 bleeding effect Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 230000002950 deficient Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000005304 joining Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 238000012856 packing Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
- 229910000859 α-Fe Inorganic materials 0.000 description 1
Landscapes
- Cookers (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は電磁誘導により加熱し
て調理を行なう電磁誘導加熱式調理器に用いられる調理
容器に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cooking container used in an electromagnetic induction heating type cooker which heats and cooks by electromagnetic induction.
【０００２】[0002]
【従来の技術】近年、加熱手段として誘導コイルを用
い、この誘導コイルによる電磁誘導で調理容器を加熱し
て炊飯等の調理を行なう電磁誘導加熱式調理器が提供さ
れている。2. Description of the Related Art In recent years, there has been provided an electromagnetic induction heating type cooker which uses an induction coil as a heating means and heats a cooking container by electromagnetic induction by the induction coil to cook rice or the like.
【０００３】このような電磁誘導加熱式調理器に用いら
れる調理容器は、非磁性金属材料からなる容器本体と、
この容器本体の外面に接合された磁性金属材料との複合
構造に構成されている。A cooking container used in such an electromagnetic induction heating cooker includes a container body made of a non-magnetic metal material,
It has a composite structure with a magnetic metal material bonded to the outer surface of the container body.
【０００４】そして誘導コイルにより磁性金属材料に渦
電流を発生させ、この渦電流に基づく磁性金属材料の発
熱で容器本体を加熱してその内部の内容物を調理するよ
うになっている。[0004] An eddy current is generated in the magnetic metal material by the induction coil, and the heat generated by the magnetic metal material based on the eddy current heats the container body to cook the contents therein.
【０００５】容器本体の材料としては、磁性金属材料の
熱を調理容器の全体に効率よく伝導させるために熱伝導
性に優れるアルミニウムが用いられ、また磁性金属材料
としては、フェライト系ステンレスが用いられている。As the material of the container body, aluminum having excellent heat conductivity is used to efficiently conduct the heat of the magnetic metal material to the entire cooking container, and ferrite stainless steel is used as the magnetic metal material. ing.
【０００６】従来、このような構造の調理容器は、アル
ミニウム板とステンレス板とを接合したクラッド板を素
材として用い、このクラッド板をプレスして所定の容器
形状に加工する方法で製造されている。Conventionally, a cooking container having such a structure is manufactured by a method of using a clad plate obtained by joining an aluminum plate and a stainless plate as a raw material and pressing the clad plate into a predetermined container shape. .
【０００７】しかしながら、このクラッド材は厚さが薄
く、このためこのクラッド材で製造された調理容器にお
いては、磁性金属材料としてのステンレス板が接する部
分が局部的に加熱され、全体を均一に加熱しにくい難点
がある。However, this clad material has a small thickness, so that in the cooking vessel made of this clad material, the portion in contact with the stainless steel plate as the magnetic metal material is locally heated, and the whole is heated uniformly. There is a difficult point to do.
【０００８】そこで、調理容器を製造する手段として、
溶融したアルミニウムを用い、このアルミニウムを金型
内に流し込んみ、これを磁性金属材料に接合させながら
容器本体を成形する方法が採られるようになってきてい
る。Therefore, as a means for manufacturing a cooking container,
A method has been adopted in which molten aluminum is used, the aluminum is poured into a mold, and the container body is molded while bonding the aluminum to a magnetic metal material.
【０００９】この方法は、下型と上型とを用いる。下型
には、調理容器の外形に対応する形状の凹部が形成さ
れ、また上型には調理容器の内形に対応する形状の凸部
が形成されている。This method uses a lower mold and an upper mold. The lower mold is formed with a concave portion having a shape corresponding to the outer shape of the cooking container, and the upper mold is formed with a convex portion having a shape corresponding to the inner shape of the cooking container.
【００１０】そしてまず、所定の形状に形成した磁性金
属材料を下型の凹部の内底部にセットし、ついで下型の
凹部内に容器本体の素材としての溶融したアルミニウム
を所定量流し込む。次に、下型の凹部内に上型の凸部を
押し込んで溶融アルミニウムを所定の圧力で加圧し、こ
の加圧状態を所定時間保持する。これによりアルミニウ
ムがやがて固化して容器本体となり、この容器本体に磁
性金属材料が一体的に接合する調理容器が完成する。First, a magnetic metal material formed in a predetermined shape is set on the inner bottom of the recess of the lower mold, and then a predetermined amount of molten aluminum as a material of the container body is poured into the recess of the lower mold. Next, the convex portion of the upper mold is pushed into the concave portion of the lower mold to press the molten aluminum at a predetermined pressure, and this pressed state is maintained for a predetermined time. As a result, the aluminum eventually solidifies to become the container body, and the cooking container in which the magnetic metal material is integrally joined to the container body is completed.
【００１１】ところで、電磁誘導加熱式調理器において
は、調理容器の外底面に温度センサが接触し、この温度
センサにより調理容器の温度が逐次検出され、この温度
情報に基づいて調理容器に対する加熱が制御される。In the electromagnetic induction heating type cooker, a temperature sensor contacts the outer bottom surface of the cooking container, the temperature of the cooking container is sequentially detected by the temperature sensor, and the cooking container is heated based on this temperature information. Controlled.
【００１２】そして一般に、温度センサが接触する調理
容器の外底面は、その内側に凹んでいてこの凹んだ凹部
に温度センサが接触するようになっている。これは、調
理容器の外底面が平坦状であると、調理容器を台の上に
置いたときにその外底面に傷が付いたり異物が付着し、
これが原因で温度センサが接触したときの温度検出精度
が悪化する恐れが生じるからである。Generally, the outer bottom surface of the cooking container with which the temperature sensor contacts is recessed inward, and the temperature sensor contacts the recessed recess. This is because if the outer bottom surface of the cooking container is flat, when the cooking container is placed on a table, the outer bottom surface will be scratched or foreign matter will adhere.
This is because the accuracy of temperature detection may deteriorate when the temperature sensor comes into contact with this.
【００１３】[0013]
【発明が解決しようとする課題】ところで、調理容器の
外底面に凹部を形成すると、当然、調理容器の内底面は
凸形状となる。そしてこの調理容器を鋳造手段で成形す
る場合には、溶融金属を加圧して容器本体を成形するた
めの上型の凸部の先端面にはその調理容器の内底面の凸
形状に対応する凹部を形成しておくことになる。By the way, when the concave portion is formed on the outer bottom surface of the cooking container, the inner bottom surface of the cooking container naturally has a convex shape. When this cooking container is molded by a casting means, the tip of the convex part of the upper mold for pressurizing the molten metal to mold the container body has a concave portion corresponding to the convex shape of the inner bottom surface of the cooking container. Will be formed.
【００１４】ところが、上型の凸部の先端面に凹部が形
成されている場合、この上型の凸部で溶融金属を加圧す
る際に、その先端面の凹部の内側に空気が溜まり、この
空気の介在で調理容器の内底面に所定形状に凸部を成形
することが困難となったり、またその残留した空気によ
り容器本体に巣やひけが生じて製造上の不良の発生率が
高くなってしまう。However, in the case where a concave portion is formed on the tip surface of the convex portion of the upper die, when the molten metal is pressed by the convex portion of the upper die, air is accumulated inside the concave portion of the tip surface, and The presence of air makes it difficult to form a convex part on the inner bottom surface of the cooking container into a predetermined shape, and the residual air causes cavities and sink marks in the container body, increasing the incidence of manufacturing defects. Will end up.
【００１５】そこで、上型に空気抜き部を設けると、成
形した容器本体に駄肉が生じ、この駄肉を成形後に機械
加工で削除する手間のかかる後処理が必要となり、コス
ト高となってしまう。Therefore, when the upper mold is provided with an air bleeding portion, the molded container body has a mess, and a complicated post-treatment is required to remove the mess by machining after molding, resulting in an increase in cost. .
【００１６】この発明はこのような点に着目してなされ
たもので、その目的とするところは、成形時の空気残留
を防止して能率よくかつ常に適正な形状に成形すること
が可能となる電磁誘導加熱用調理容器を提供することに
ある。The present invention has been made paying attention to such a point, and an object thereof is to prevent air from remaining during molding and to mold efficiently and always in a proper shape. An object is to provide a cooking container for electromagnetic induction heating.
【００１７】[0017]
【課題を解決するための手段】この発明はこのような目
的を達成するために、アルミニウムを主体とする非磁性
金属材料からなる容器本体の下部外面に磁性金属材料を
接合させた有底筒状の容器であって、その上端の開口部
の直径がＤであり、底面の中央部がその内側に凸となる
緩やかな形状の凸部として突出し、容器の内側最下面か
ら前記凸部の最頂部までの高さの寸法がＣであり、前記
高さＣが前記直径Ｄの約 1/100以下となるように構成し
たものである。In order to achieve such an object, the present invention has a bottomed cylindrical shape in which a magnetic metal material is joined to the lower outer surface of a container body made of a non-magnetic metal material mainly containing aluminum. The diameter of the opening at the upper end of the container is D, the central portion of the bottom surface protrudes as a convex portion having a gentle shape, and the central portion of the bottom surface projects from the innermost bottom surface of the container to the top portion of the convex portion. The height dimension is up to C, and the height C is about 1/100 or less of the diameter D.
【００１８】[0018]
【作用】凸部の高さＣが直径Ｄの約 1/100以下である
と、調理容器の成形時にその成形用の上型の凹部の内側
に空気が溜まるようなことがなく、したがって容器本体
の内底面に所定形状の凸部を成形することができ、また
容器本体に巣やひけが生じるようなことがなく、製造上
の不良の発生率が大幅に低減する。When the height C of the convex portion is about 1/100 or less of the diameter D, air does not collect inside the concave portion of the upper mold for molding the cooking container, and therefore the container body A convex portion having a predetermined shape can be formed on the inner bottom surface of the container, and no cavities or sink marks are formed on the container body, and the incidence of manufacturing defects is greatly reduced.
【００１９】[0019]
【実施例】以下、この発明の一実施例について説明す
る。図１には、炊飯器として構成された電磁誘導加熱式
調理器の構造を示してあり、符号１が外枠で、この外枠
１内に合成樹脂により有底筒状に形成された内枠２が収
納されている。この内枠２は上部外周にフランジ３を一
体的に有し、このフランジ３が外枠１の上端の開口縁部
に係止されている。An embodiment of the present invention will be described below. FIG. 1 shows the structure of an electromagnetic induction heating type cooker configured as a rice cooker. Reference numeral 1 denotes an outer frame, and an inner frame formed in the outer frame 1 by a synthetic resin into a bottomed cylindrical shape. 2 are stored. The inner frame 2 integrally has a flange 3 on the outer circumference of the upper part, and the flange 3 is locked to the opening edge portion of the upper end of the outer frame 1.
【００２０】内枠２の外底面および外側面の下部にはそ
れぞれ誘導コイル４，５が取り付けられ、これら誘導コ
イル４，５がコイルカバー６で覆われている。内枠２の
底面の中央部には開口７が形成され、またコイルカバー
６の底面の中央部には温度センサ８が取り付けられ、こ
の温度センサ８が前記開口７を通して内枠２の内底部に
突出している。Induction coils 4 and 5 are attached to the outer bottom surface and the lower portion of the outer surface of the inner frame 2, and the induction coils 4 and 5 are covered with a coil cover 6. An opening 7 is formed in the center of the bottom surface of the inner frame 2, and a temperature sensor 8 is attached to the center of the bottom surface of the coil cover 6, and the temperature sensor 8 is attached to the inner bottom of the inner frame 2 through the opening 7. It is protruding.
【００２１】内枠２の内部には、炊飯用の鍋としての調
理容器１０が挿脱自在に収納されている。この調理容器
１０の上端の開口縁部にはその外側に折曲するフランジ
１１が一体に形成され、このフランジ１１が内枠２の上
端の開口縁部に掛け止められ、これにより調理容器１０
が内枠２内に支持されている。そしてこの調理容器１０
の外面と内枠２の内面との間に所定の隙間が確保されて
いる。Inside the inner frame 2, a cooking container 10 serving as a pan for cooking rice is removably housed. A flange 11 which is bent outward is integrally formed at the opening edge of the upper end of the cooking container 10, and the flange 11 is hooked on the opening edge of the upper end of the inner frame 2, whereby the cooking container 10 is formed.
Are supported in the inner frame 2. And this cooking container 10
A predetermined gap is secured between the outer surface of the and the inner surface of the inner frame 2.
【００２２】外枠１の上面にはヒンジ（図示せず）を介
して蓋体１２が回動自在に取り付けられ、この蓋体１２
の下面に蓋パッキング１３および内蓋１４が取り付けら
れ、前記内蓋１４により調理容器１０の上端の開口部が
開閉されるようになっている。A lid 12 is rotatably attached to the upper surface of the outer frame 1 via a hinge (not shown).
A lid packing 13 and an inner lid 14 are attached to the lower surface of the cooking container 10, and the opening at the upper end of the cooking container 10 is opened and closed by the inner lid 14.
【００２３】内蓋１４には調理容器１０内の蒸気を流出
させる複数の小孔１５…が形成され、また蓋体１２にそ
の蒸気を外部に放出させる蒸気口１６が設けられてい
る。さらに蓋体１２にはこの蓋体１２の下面を加熱する
蓋ヒータ１７およびその下面の温度を検出する蓋センサ
１８が設けられている。また内枠２の外周の中段部には
胴ヒータ１９が設けられている。The inner lid 14 is formed with a plurality of small holes 15 for letting out the steam in the cooking container 10, and the lid 12 is provided with a steam port 16 for discharging the steam to the outside. Further, the lid 12 is provided with a lid heater 17 for heating the lower surface of the lid 12 and a lid sensor 18 for detecting the temperature of the lower surface. Further, a body heater 19 is provided in the middle part of the outer periphery of the inner frame 2.
【００２４】外枠１の内底部には制御基板２０が設けら
れ、この制御基板２０に前記誘導コイル４，５に高周波
電流を供給するためのインバータ回路等が設けられてい
る。また外枠１の内底部にはモータ２１で駆動される冷
却ファン２２が設けられ、前記冷却ファン２２に対向し
て外枠１の底面に吸気口２３が形成され、さらに外枠１
の側面下部に排気口２４が形成されている。A control board 20 is provided on the inner bottom of the outer frame 1, and an inverter circuit for supplying a high frequency current to the induction coils 4 and 5 is provided on the control board 20. A cooling fan 22 driven by a motor 21 is provided on the inner bottom portion of the outer frame 1, and an intake port 23 is formed on the bottom surface of the outer frame 1 so as to face the cooling fan 22.
An exhaust port 24 is formed in the lower part of the side surface of the.
【００２５】そして前記冷却ファン２２の回転により外
枠１の外部の空気が吸気口２３から外枠１内に吸入され
るとともに、この空気が前記制御基板２０に向けて送風
され、この送風空気で制御基板２０が冷却されるように
なっている。By the rotation of the cooling fan 22, the air outside the outer frame 1 is sucked into the outer frame 1 through the intake port 23, and this air is blown toward the control board 20. The control board 20 is cooled.
【００２６】調理容器１０は、非磁性金属材料からなる
容器本体２５と、この容器本体２５の底面から側面下部
に亘る部分に設けられたほぼ皿形状をなす磁性金属材料
２６とで構成されている。The cooking container 10 is composed of a container body 25 made of a non-magnetic metal material, and a substantially dish-shaped magnetic metal material 26 provided in a portion extending from the bottom surface of the container body 25 to the lower side surface. .
【００２７】そして磁性金属材料２６が内枠２に設けら
れた前記誘導コイル４，５に所定の間隔をあけて対向
し、また調理容器１０の外底面の中央部に前記温度セン
サ８が接触し、この温度センサ８により調理容器１０の
温度が検出されるようになっている。The magnetic metal material 26 faces the induction coils 4 and 5 provided on the inner frame 2 with a predetermined space, and the temperature sensor 8 contacts the central portion of the outer bottom surface of the cooking container 10. The temperature of the cooking container 10 is detected by the temperature sensor 8.
【００２８】調理時においては、制御基板２０のインバ
ータ回路により誘導コイル４，５に高周波電流が供給さ
れ、この高周波電流により誘導コイル４，５に交番磁界
が発生し、これに伴いその磁界中に配置する磁性金属材
料２６に渦電流が流れ、この渦電流によるジュール熱で
磁性金属材料２６が発熱し、この熱が容器本体２５に伝
導し、これにより調理容器１０内の内容物、つまり米と
水が加熱される。During cooking, a high-frequency current is supplied to the induction coils 4 and 5 by the inverter circuit of the control board 20, and an alternating magnetic field is generated in the induction coils 4 and 5 by the high-frequency current. An eddy current flows through the magnetic metal material 26 to be arranged, and the magnetic metal material 26 generates heat due to Joule heat due to this eddy current, and this heat is conducted to the container body 25, whereby the contents in the cooking container 10, that is, rice. The water is heated.
【００２９】調理容器１０の温度は温度センサ８により
逐次検出され、この検出温度に応じて、予め設定された
制御シーケンスに従って調理容器１０の加熱量が調整さ
れ、この調整で炊飯や保温が行なわれる。The temperature of the cooking container 10 is sequentially detected by the temperature sensor 8, and the heating amount of the cooking container 10 is adjusted according to a preset control sequence according to the detected temperature, and the rice cooking and the heat retention are performed by this adjustment. .
【００３０】調理容器１０の容器本体２５を構成する非
磁性金属材料は、熱伝導が良好で軽量なアルミニウムで
あり、磁性金属材料２６は例えばフェライト系ステンレ
ス（SUS430）である。The non-magnetic metal material forming the container body 25 of the cooking container 10 is aluminum, which has good thermal conductivity and is lightweight, and the magnetic metal material 26 is, for example, ferritic stainless steel (SUS430).
【００３１】図２には調理容器１０の断面構造を示して
あり、この調理容器１０の外底面、つまり磁性金属材料
２６の底面中央部には凹部２６ａが形成され、また調理
容器１０の内底面つまり容器本体２５の内底中央部には
前記凹部２６ａに対応する緩やかな凸状の凸部２５ａが
形成されている。FIG. 2 shows a cross-sectional structure of the cooking container 10. An outer bottom surface of the cooking container 10, that is, a central portion of the bottom surface of the magnetic metal material 26 is formed with a recess 26a, and an inner bottom surface of the cooking container 10 is formed. That is, a gentle convex portion 25a corresponding to the concave portion 26a is formed at the center of the inner bottom of the container body 25.
【００３２】この調理容器１０の上端の開口部の直径は
Ｄであり、調理容器１０の内側の最下面から前記凸部２
５ａの最頂部までの高さの寸法がＣとなっている。そし
て高さＣは直径Ｄの約 1/100以下となっている。The diameter of the opening at the upper end of the cooking container 10 is D, and the convex portion 2 is formed from the innermost bottom surface of the cooking container 10.
The dimension of the height to the top of 5a is C. The height C is less than about 1/100 of the diameter D.
【００３３】この調理容器１０は、鋳造成形により製造
する。この鋳造成形においては、図３に示すように、下
型ａと上型ｂとを用いる。下型ａには、調理容器１０の
外形に対応する形状の凹部ｃが形成され、また上型ｂに
は調理容器１０の内形に対応する形状の凸部ｄが形成さ
れている。The cooking container 10 is manufactured by casting. In this cast molding, as shown in FIG. 3, a lower mold a and an upper mold b are used. The lower mold a has a concave portion c having a shape corresponding to the outer shape of the cooking container 10, and the upper mold b has a convex portion d having a shape corresponding to the inner shape of the cooking container 10.
【００３４】そして前記凸部ｄの先端面に、調理容器１
０における前記凸部２５ａに対応する凹部ｄ1 が形成さ
れている。この凹部ｄ1 は前記凸部２５ａに対応するも
のであるから、その深さＣ′が凸部２５ａの高さＣと同
様に、調理容器１０の開口部の直径Ｄの約 1/100以下と
なっている。Then, the cooking container 1 is attached to the tip surface of the convex portion d.
A concave portion d1 corresponding to the convex portion 25a at 0 is formed. Since this concave portion d1 corresponds to the convex portion 25a, its depth C'is about 1/100 or less of the diameter D of the opening of the cooking container 10 as well as the height C of the convex portion 25a. ing.
【００３５】調理容器１０の製造時には、まず、フェラ
イト系ステンレスのプレートをプレスして容器本体２５
に接合すべき所定形状の磁性金属材料２６を成形する。
そしてこの磁性金属材料２６を下型ａの凹部ｃ内に挿入
してその内底部にセットする。When manufacturing the cooking container 10, first, a ferritic stainless steel plate is pressed to make the container body 25.
A magnetic metal material 26 having a predetermined shape to be bonded to is molded.
Then, the magnetic metal material 26 is inserted into the recess c of the lower mold a and set on the inner bottom thereof.
【００３６】この状態で、下型ａの凹部ｃ内に容器本体
２５の素材としての溶融したアルミニウムを所定量流し
込む。ついで、下型ａの凹部ｃ内に上型ｂの凸部ｄを押
し込んで溶融アルミニウムを所定の圧力で加圧し、この
加圧状態を所定時間保持する。この間に、アルミニウム
がやがて固化して容器本体２５となり、この容器本体２
５に磁性金属材料２６が一体的に接合する調理容器１０
が完成する。この調理容器１０の内底面の中央部には、
上型ｂの凸部ｄの先端面に形成された凹部ｄ1に基づい
て緩やかな凸状の凸部２５ａが形成される。In this state, a predetermined amount of molten aluminum as a material of the container body 25 is poured into the recess c of the lower mold a. Next, the convex portion d of the upper mold b is pushed into the concave portion c of the lower mold a to press the molten aluminum with a predetermined pressure, and this pressed state is maintained for a predetermined time. During this time, the aluminum eventually solidifies to become the container body 25.
Cooking container 10 in which magnetic metal material 26 is integrally joined to 5
Is completed. At the center of the inner bottom surface of this cooking container 10,
A gentle convex portion 25a is formed based on the concave portion d1 formed on the tip surface of the convex portion d of the upper mold b.
【００３７】ここで、上型ｂの凸部ｄの先端面の凹部ｄ
1 の深さＣ′は、調理容器１０の上端の開口部の直径Ｄ
の1/100 以下であり、このため調理容器１０の成形時
に、この凹部ｄ1 の内側に空気が溜まるようなことがな
く、したがって容器本体２５の内底面に所定形状の凸部
２５を成形することができ、また容器本体２５に巣やひ
けが生じるようなことがなく、製造上の不良の発生率が
大幅に低減する。Here, the concave portion d on the tip surface of the convex portion d of the upper mold b
The depth C'of 1 is the diameter D of the opening at the upper end of the cooking container 10.
1/100 or less of this, and therefore, when the cooking container 10 is molded, air is not accumulated inside the concave portion d1. Therefore, the convex portion 25 having a predetermined shape should be formed on the inner bottom surface of the container body 25. In addition, the container body 25 is free from cavities and sink marks, and the incidence of manufacturing defects is greatly reduced.
【００３８】図４は、凸部２５ａの高さＣの大きさが種
々異なる調理容器１０を成形したときの不良発生率を実
験により測定した結果を示すグラフ図である。なお、こ
の図に示すＡは、調理容器１０の開口部の直径Ｄが 200
mmのもの、Ｂは調理容器１０の開口部の直径Ｄが 150mm
のものである。FIG. 4 is a graph showing the result of an experiment measuring the defect occurrence rate when the cooking containers 10 having different heights C of the convex portions 25a are formed. In addition, A shown in this figure indicates that the diameter D of the opening of the cooking container 10 is 200
mm, B is the diameter D of the opening of the cooking container 10 is 150 mm
belongs to.
【００３９】このグラフ図から分かるように、直径Ｄに
対する凸部２５ａの高さＣの大きさが大きくなると、不
良の発生率が高くなる。直径Ｄに対する凸部２５ａの高
さＣの大きさが大きくなると、調理容器１０の成形時に
おいて、上型ｂの凸部ｄの先端面の凹部ｄ1 の内側最上
部から凸部ｄの外側面までの距離の長さ、つまり空気の
排出経路の長さが長くなり、このため凹部ｄ1 の内側に
空気が残留して不良の発生率が高まるものと言える。し
かし図４のグラフ図から分かるように、凸部２５ａの高
さＣを直径Ｄの約 1/100以下に設定してあると、空気の
排出経路が短くなって不良の発生率が大幅に低くなり、
所定形状の凸部２５ａを成形することが可能となる。な
お、容器本体を成形する素材としては、アルミニウムに
限らずアルミニウムアルミニウム合金であっても差し支
えない。As can be seen from this graph, when the height C of the convex portion 25a with respect to the diameter D increases, the defect occurrence rate increases. When the size of the height C of the convex portion 25a with respect to the diameter D becomes large, during molding of the cooking container 10, from the innermost top of the concave portion d1 of the tip end surface of the convex portion d of the upper mold b to the outer surface of the convex portion d. It can be said that the length of the distance, that is, the length of the air discharge path, becomes longer, so that the air remains inside the recess d1 and the defective rate increases. However, as can be seen from the graph of FIG. 4, when the height C of the convex portion 25a is set to about 1/100 or less of the diameter D, the air discharge path is shortened and the incidence of defects is significantly reduced. Becomes
It is possible to form the convex portion 25a having a predetermined shape. The material for forming the container body is not limited to aluminum and may be aluminum aluminum alloy.
【００４０】[0040]
【発明の効果】以上説明したようにこの発明によれば、
成形時の空気残留を防止して常に適正な形状の調理容器
を能率よく成形することができる。As described above, according to the present invention,
It is possible to prevent air from remaining during molding and always efficiently mold a cooking container having an appropriate shape.
【図１】この電磁誘導加熱式調理器の構造を示す断面
図。FIG. 1 is a cross-sectional view showing the structure of this electromagnetic induction heating type cooking device.
【図２】この発明の一実施例に係る調理容器の断面図。FIG. 2 is a sectional view of a cooking container according to an embodiment of the present invention.
【図３】その調理容器の製造用の金型を示す断面図FIG. 3 is a sectional view showing a mold for manufacturing the cooking container.
【図４】調理容器の凸部の高さと、その成形時の不良発
生率との関係を示すグラフ図。FIG. 4 is a graph showing the relationship between the height of the convex portion of the cooking container and the defect occurrence rate during its molding.
１０…調理容器 ２５…容器本体 ２５ａ…凸部 ２６…磁性金属材料 10 ... Cooking container 25 ... Container body 25a ... Convex portion 26 ... Magnetic metal material
Claims (1)
からなる容器本体の下部外面に磁性金属材料を接合させ
た有底筒状の容器であって、その上端の開口部の直径が
Ｄであり、底面の中央部がその内側に凸となる緩やかな
形状の凸部として突出し、 容器の内側最下面から前記凸部の最頂部までの高さの寸
法がＣであり、 前記高さＣが前記直径Ｄの約 1/100以下であることを特
徴とする電磁誘導加熱用調理容器。1. A bottomed cylindrical container in which a magnetic metal material is bonded to the lower outer surface of a container body made of a non-magnetic metal material mainly composed of aluminum, and the diameter of the opening at the upper end is D. The central portion of the bottom surface protrudes as a convex portion having a gentle shape inwardly protruding, and the height dimension from the innermost bottom surface of the container to the top portion of the convex portion is C, and the height C is A cooking container for electromagnetic induction heating, which has a diameter of about 1/100 or less.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17116294A JP3285450B2 (en) | 1994-07-22 | 1994-07-22 | Manufacturing method of cooking container for electromagnetic induction heating |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17116294A JP3285450B2 (en) | 1994-07-22 | 1994-07-22 | Manufacturing method of cooking container for electromagnetic induction heating |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0833560A true JPH0833560A (en) | 1996-02-06 |
| JP3285450B2 JP3285450B2 (en) | 2002-05-27 |
Family
ID=15918148
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17116294A Expired - Lifetime JP3285450B2 (en) | 1994-07-22 | 1994-07-22 | Manufacturing method of cooking container for electromagnetic induction heating |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3285450B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR101987652B1 (en) * | 2018-12-20 | 2019-09-30 | (주)쓰리바바 | Manufacturing method of cooking container for rice cooker of induction stove and cooking vessel prepared by his method |
| WO2019203390A1 (en) * | 2018-04-16 | 2019-10-24 | (주)쓰리바바 | Cooking container having thermal deformation prevention structure, and manufacturing method therefor |
-
1994
- 1994-07-22 JP JP17116294A patent/JP3285450B2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019203390A1 (en) * | 2018-04-16 | 2019-10-24 | (주)쓰리바바 | Cooking container having thermal deformation prevention structure, and manufacturing method therefor |
| JP2021516600A (en) * | 2018-04-16 | 2021-07-08 | スリーババ シーオー．， エルティーディー． | Cooking container with thermal deformation prevention structure and its manufacturing method |
| KR101987652B1 (en) * | 2018-12-20 | 2019-09-30 | (주)쓰리바바 | Manufacturing method of cooking container for rice cooker of induction stove and cooking vessel prepared by his method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3285450B2 (en) | 2002-05-27 |
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