JPS60236485A

JPS60236485A - Buried heater

Info

Publication number: JPS60236485A
Application number: JP8057585A
Authority: JP
Inventors: 浦田　進; 巧井岡; 竹迫　幸一; 慶樹浜
Original assignee: Matsushita Electric Industrial Co Ltd
Current assignee: Panasonic Holdings Corp
Priority date: 1985-04-16
Filing date: 1985-04-16
Publication date: 1985-11-25

Abstract

(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

【発明の詳細な説明】産業上の利用分野本発明は一般家庭において使用するホットプレート等の
調理器に使用する埋込型発熱体に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an embedded heating element for use in cooking appliances such as hot plates used in general households.

従来例の構成とその問題点従来、この種の埋込型発熱体においては、第１図に示す
ように金属製熱板１にＵ字状の溝２を設け、このＵ字状
の溝２内にアルミナ、マグネシア。Conventional Structure and Problems Conventionally, in this type of embedded heating element, as shown in FIG. 1, a U-shaped groove 2 is provided in a metal heating plate 1. Alumina and magnesia inside.

タルク等の絶縁粉末３を充填し、この絶縁粉末３の山ｒ
１メル勢を移虐者飴奔蕾皺幼ｌル檀醤１イこρ絶縁粉末
３の上面と溝２０両上端の高さを、はぼ同じ高さとした
ものが一般的であり、この時の加工法は第２図に示すよ
うに電熱線４の埋込（第２図イ）の後、すでに加圧され
た絶縁粉末６を′充填（第２図口、第２図ハ）するか、
または金属熱板１に計量用治具６をセットし、との治具
６内に絶縁粉末６を充填（第２図工）し、成形型７で加
圧し成形を行う（第２図ホ）必要があシ、絶縁材料の予
備加圧や、計量用治具のセット等加工工数が多いという
問題があった。Fill with insulating powder 3 such as talc, and add a mountain r of this insulating powder 3.
Generally, the height of the upper surface of the insulation powder 3 and the upper ends of both grooves 20 are approximately the same height. As shown in Fig. 2, after the heating wire 4 is embedded (Fig. 2 A), the insulating powder 6 which has already been pressurized is filled (Fig. 2 Opening, Fig. 2 C). ,
Alternatively, it is necessary to set the measuring jig 6 on the metal hot plate 1, fill the jig 6 with insulating powder 6 (Fig. 2), and pressurize it with the mold 7 to form it (Fig. 2 E). There was a problem in that it required many man-hours for machining, such as pre-pressing the insulating material and setting the measuring jig.

発明の目的本発明はこのような従来の問題を解消し、加工性の向上
をはかった埋込型発熱体を提供するものである。OBJECTS OF THE INVENTION The present invention solves these conventional problems and provides an embedded heating element with improved workability.

発明の構成本発明の埋込型発熱体は、熱盤に形成した溝内に絶縁材
料を介して電熱線を埋設し、溝の両上端が絶縁材料面よ
り突出し、突出した溝の両上端の幅が絶縁材料を充填し
た部分の溝の幅より大きくしたものであり、埋込型発熱
体の加工法を向上させるものである。Structure of the Invention In the embedded heating element of the present invention, a heating wire is embedded in a groove formed in a heating plate through an insulating material, and both upper ends of the groove protrude from the surface of the insulating material. The width is larger than the width of the groove in the portion filled with the insulating material, which improves the processing method of the embedded heating element.

実施例の説明以下、添付図面に、基づいて本発明の一実施例について
説明する。第３図〜第６図において、８は調理面の裏面
に設けたＵ字状の溝であシ、このＵ字状の溝８の中には
、アルミナ、マグネシア、タルク等の絶縁材料９を介し
て電熱線１ｏを埋設している。DESCRIPTION OF THE EMBODIMENTS An embodiment of the present invention will be described below with reference to the accompanying drawings. In Figures 3 to 6, 8 is a U-shaped groove provided on the back side of the cooking surface, and an insulating material 9 such as alumina, magnesia, talc, etc. A heating wire 1o is buried through it.

なおこの埋込型発熱体の加工は第４図に示すようにＵ字
状溝内８に絶縁材料９を溝の上端部まで充填しく第４図
イ）、次に成形型で加圧を行う（第４図口）。この加圧
後の高さをｈｌ　とし、溝の深冷をＨ１絶縁材料９の圧
縮率をαとするとｈ１＝ａ−耳となる。As shown in Fig. 4, this embedded type heating element is processed by filling the U-shaped groove 8 with insulating material 9 up to the upper end of the groove (Fig. 4 A), and then applying pressure with a mold. (Figure 4 mouth). If the height after this pressurization is hl, and the deep cooling of the groove is H1, and the compressibility of the insulating material 9 is α, then h1=a-ear.

さらにこの加圧された絶縁材料９に電熱線１０を圧入し
く第４図ハ）、その後、この溝内にさらに絶縁材料９を
溝上端面まで充填しく第４図工）、成形型で加圧を行う
（第４図ホ）。この時の絶縁材料９の加圧後の高さをｈ
２とすると、ｈ２＝α（Ｈ−ｈｌ）となシ、成形加圧後
の絶縁材材９の全体の高さｈは、ｈ＝ｈ１＋ｈ２＝αＨ＋α（Ｈ−αＨ）＝Ｈ（２ｇ−α
　）となるように、溝の両上端部を絶縁材料９面よシ突出さ
せる。Furthermore, the heating wire 10 is press-fitted into this pressurized insulating material 9 (Fig. 4 c), and then the insulating material 9 is further filled into this groove up to the upper end surface of the groove (Fig. 4 c)), and pressurized with a mold. (Fig. 4 E). At this time, the height of the insulating material 9 after being pressurized is h
2, then h2=α(H-hl), and the overall height h of the insulating material 9 after forming and pressing is h=h1+h2=αH+α(H-αH)=H(2g-α
) Both upper ends of the groove protrude beyond the surface of the insulating material 9.

゛　このように絶縁材料９の圧縮率に応じて、絶縁材料
９面より溝８の両上端部を突出させることにより、従来
のように、予め加圧圧縮された絶縁材料を充填したり、
計量用の治具を用いなくても直接溝８内に絶縁材料９を
充填できるため加工性を向上させることが可能となる。゛ By making both upper ends of the groove 8 protrude from the surface of the insulating material 9 according to the compression ratio of the insulating material 9 in this way, it is possible to fill the groove with insulating material that has been pressurized and compressed in advance, as in the conventional case.
Since the insulating material 9 can be directly filled into the groove 8 without using a measuring jig, workability can be improved.

また、第５図に示すように、この絶縁、材料９の面より
突出させた溝８の両端面部の幅りを絶縁材料９を充填し
ている部分の溝幅ｌよシ大きくすることによシ、成形後
の溝内の掃除等を容易にすることができる。In addition, as shown in FIG. 5, the width of both end surfaces of the groove 8 protruding from the surface of the insulation material 9 is made larger than the groove width l of the portion filled with the insulation material 9. Also, it is possible to easily clean the inside of the groove after molding.

一般に埋込型発熱体の場合、本体の溝内等に容易に落下
する状態で絶縁材料９が付着したまま使用されることは
好ましくなく、溝内は十分に掃除を行う必要がある。In general, in the case of an embedded type heating element, it is not preferable to use the heating element with the insulating material 9 attached so that it easily falls into the groove of the main body, and the inside of the groove needs to be thoroughly cleaned.

絶縁材料９を充填後加圧する場合、加圧を全面均一にす
るため、溝幅と成形型の隙間ｔはできるだけ゛小さくす
る必要があるが、絶縁材料９がこの隙間ｔの中に入り、
加圧され、溝８の側面に付着し容易に掃除をすることが
困難である。When applying pressure after filling the insulating material 9, the gap t between the groove width and the mold must be made as small as possible in order to make the pressure uniform over the entire surface.
It is pressurized and adheres to the side surfaces of the groove 8, making it difficult to clean it easily.

しかし、絶縁材料９０面より突出した両上端部の溝幅り
を絶縁材料９′を充填している部分の溝幅ｌよシ若干大
きくすることによシ、加圧成形時、溝幅と成形型との隙
間′ｔを大きくとれるため、隙間ｔに入った絶縁材料９
にかかる圧力が小さく絶縁材料９が固まることもなく容
易に掃除が行える。However, by making the groove width at both upper ends protruding from the surface of the insulating material 90 slightly larger than the groove width l of the portion filled with the insulating material 9', the groove width and forming Since the gap 't with the mold can be made large, the insulating material 9 that has entered the gap 't'
Since the pressure applied to the insulating material 9 is small, the insulating material 9 does not harden and can be easily cleaned.

また、成形型の幅を絶縁材料９が充填されている部分の
幅と同一とできるため、絶縁材料の加圧を全面均一にす
ることができ、クラックや溝からの剥離のない埋込型発
熱体を得ることができる。In addition, since the width of the mold can be made the same as the width of the part filled with the insulating material 9, the pressure of the insulating material can be made uniform over the entire surface, and the embedded type heat generation without peeling from cracks or grooves can be achieved. You can get a body.

発明の効果上記実施例からあきらかなように、本発明の埋込型発熱
体は、溝の両上端部を絶縁材料より突出させ、さらにこ
の突出部の溝幅を大きくしているため一加工性の向上、
性能の向トをは力）るこｋができるものである。Effects of the Invention As is clear from the above embodiments, the embedded heating element of the present invention has both upper ends of the groove protruding from the insulating material, and furthermore, the width of the groove at this protruding portion is increased, so that it is easy to process. improvement,
There are many things that can be done to improve performance.

[Brief explanation of the drawing]

第１図は従来の埋込型発熱体を示す断面図、第２図イ〜
ホは同埋込型発熱体の加工工程を示す断面図、第３図は
本発明の一実施例を示す埋込型発熱体の断面図、第゛４
図イ〜ホは同埋込型発熱体の加工工程を示す断面図、第
６図は本発明の他の実施例を示す埋込型発熱体の断面図
、第６図は同埋込型発熱体の加工工程を示す断面図であ
る。８・・・・・・溝、９・・・・・・絶縁材料、１ｏ・・
・・・・電熱線。代理人の氏名　弁理士　中　尾　敏　男　ほか１名ＩＩ
　図第３図１４図Figure 1 is a sectional view showing a conventional embedded heating element, Figure 2
E is a cross-sectional view showing the processing steps of the embedded heating element, FIG. 3 is a cross-sectional view of the embedded heating element showing an embodiment of the present invention, and FIG.
Figures A to H are cross-sectional views showing the processing steps of the embedded type heating element, Figure 6 is a cross-sectional view of the embedded type heating element showing another embodiment of the present invention, and Figure 6 is the same embedded type heating element. FIG. 3 is a cross-sectional view showing the processing steps of the body. 8...Groove, 9...Insulating material, 1o...
...Heating wire. Name of agent: Patent attorney Toshio Nakao and one other person II
Figure 3 Figure 14

Claims

[Claims]

A heating wire is buried in a groove formed in a heating plate through an insulating material, both upper ends of the groove are made to protrude beyond the insulating material, and the groove width at both upper ends of the protruding groove is filled with the insulating material. An embedded heating element with a larger groove width.