JP2662616B2 - Double-sided heater - Google Patents

Double-sided heater

Info

Publication number
JP2662616B2
JP2662616B2 JP5507954A JP50795493A JP2662616B2 JP 2662616 B2 JP2662616 B2 JP 2662616B2 JP 5507954 A JP5507954 A JP 5507954A JP 50795493 A JP50795493 A JP 50795493A JP 2662616 B2 JP2662616 B2 JP 2662616B2
Authority
JP
Japan
Prior art keywords
coil
heater
sided
sided heater
ferromagnetic
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.)
Expired - Lifetime
Application number
JP5507954A
Other languages
Japanese (ja)
Other versions
JPH06503206A (en
Inventor
ディケンズ、デイビッド・エム
ロス、ジェームズ・ビー
フィネガン、ジョエル・ディー
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Uponor Aldyl Co Inc
Original Assignee
Uponor Aldyl Co Inc
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Uponor Aldyl Co Inc filed Critical Uponor Aldyl Co Inc
Publication of JPH06503206A publication Critical patent/JPH06503206A/en
Application granted granted Critical
Publication of JP2662616B2 publication Critical patent/JP2662616B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/36—Coil arrangements
    • H05B6/362—Coil arrangements with flat coil conductors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/20—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror"
    • B29C65/2007—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by the type of welding mirror
    • B29C65/2015—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools with direct contact, e.g. using "mirror" characterised by the type of welding mirror being a single welding mirror comprising several separate heating surfaces in different planes, e.g. said heating surfaces having different temperatures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/02—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure
    • B29C65/18—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools
    • B29C65/24—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using heated tools characterised by the means for heating the tool
    • B29C65/30—Electrical means
    • B29C65/32—Induction
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C65/00—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor
    • B29C65/78—Means for handling the parts to be joined, e.g. for making containers or hollow articles, e.g. means for handling sheets, plates, web-like materials, tubular articles, hollow articles or elements to be joined therewith; Means for discharging the joined articles from the joining apparatus
    • B29C65/7841—Holding or clamping means for handling purposes
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/004—Preventing sticking together, e.g. of some areas of the parts to be joined
    • B29C66/0042—Preventing sticking together, e.g. of some areas of the parts to be joined of the joining tool and the parts to be joined
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/01—General aspects dealing with the joint area or with the area to be joined
    • B29C66/05—Particular design of joint configurations
    • B29C66/10—Particular design of joint configurations particular design of the joint cross-sections
    • B29C66/11—Joint cross-sections comprising a single joint-segment, i.e. one of the parts to be joined comprising a single joint-segment in the joint cross-section
    • B29C66/114—Single butt joints
    • B29C66/1142—Single butt to butt joints
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5221—Joining tubular articles for forming coaxial connections, i.e. the tubular articles to be joined forming a zero angle relative to each other
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8122—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the composition of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/812—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/8126—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the composition, by the structure, by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps characterised by the intensive physical properties or by the optical properties of the material constituting the pressing elements, e.g. constituting the welding jaws or clamps
    • B29C66/81261—Thermal properties, e.g. thermal conductivity, thermal expansion coefficient
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8182—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects
    • B29C66/81821—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the thermal insulating constructional aspects of the welding jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/81—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps
    • B29C66/818—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps
    • B29C66/8187—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects
    • B29C66/81871—General aspects of the pressing elements, i.e. the elements applying pressure on the parts to be joined in the area to be joined, e.g. the welding jaws or clamps characterised by the cooling constructional aspects, or by the thermal or electrical insulating or conducting constructional aspects of the welding jaws or of the clamps ; comprising means for compensating for the thermal expansion of the welding jaws or of the clamps characterised by the electrical insulating constructional aspects of the welding jaws
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/80—General aspects of machine operations or constructions and parts thereof
    • B29C66/84—Specific machine types or machines suitable for specific applications
    • B29C66/861—Hand-held tools
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
    • B29C66/00—General aspects of processes or apparatus for joining preformed parts
    • B29C66/50—General aspects of joining tubular articles; General aspects of joining long products, i.e. bars or profiled elements; General aspects of joining single elements to tubular articles, hollow articles or bars; General aspects of joining several hollow-preforms to form hollow or tubular articles
    • B29C66/51—Joining tubular articles, profiled elements or bars; Joining single elements to tubular articles, hollow articles or bars; Joining several hollow-preforms to form hollow or tubular articles
    • B29C66/52—Joining tubular articles, bars or profiled elements
    • B29C66/522—Joining tubular articles
    • B29C66/5224—Joining tubular articles for forming fork-shaped connections, e.g. for making Y-shaped pieces
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29K—INDEXING SCHEME ASSOCIATED WITH SUBCLASSES B29B, B29C OR B29D, RELATING TO MOULDING MATERIALS OR TO MATERIALS FOR MOULDS, REINFORCEMENTS, FILLERS OR PREFORMED PARTS, e.g. INSERTS
    • B29K2995/00—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds
    • B29K2995/0003—Properties of moulding materials, reinforcements, fillers, preformed parts or moulds having particular electrical or magnetic properties, e.g. piezoelectric
    • B29K2995/0008—Magnetic or paramagnetic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
    • B29L—INDEXING SCHEME ASSOCIATED WITH SUBCLASS B29C, RELATING TO PARTICULAR ARTICLES
    • B29L2023/00—Tubular articles
    • B29L2023/22—Tubes or pipes, i.e. rigid

Landscapes

  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Electromagnetism (AREA)
  • General Induction Heating (AREA)
  • Lining Or Joining Of Plastics Or The Like (AREA)

Abstract

A dual plate heater (2) provides two parallel temperature self-regulating heater plates (6, 8) or wire mesh comprising ferromagnetic material with one or more electrically energized coils (4) parallel to and located between the heater plates (6, 8) which coil(s) (4) when energized by a constant current (14) or by an otherwise controlled current heat the plates to their Curie temperature or temperatures. The coil may be a flat spiral of thin conductive (copper) wire (4) embedded in a thin layer of a heat conductive, electrically non-conductive material (14) between said plates whereby heat energy generated in the coil is supplied to the heater plates (6, 8). The dual plate heater (2) may be employed to heat plastic pipes (Fig. 14) to their butt welding temperatures after which the heater is removed and the ends of the pipes to be joined are brought into contact under pressure. The dual plate heaters may also be employed in other arrangements such as shelves (Fig. 15) in a dispensing machine.

Description

【発明の詳細な説明】 関連出願 本件出願は、「二面ヒータ」と題する1991年10月23日
提出の出願第07/780,977号の一部継続出願である。Detailed Description of the Invention Related Application This application is a continuation-in-part of application Ser. No. 07 / 780,977, filed Oct. 23, 1991, entitled "Two Sided Heaters."

発明の背景 本発明は、温度自己調節型二面ヒータに関し、特に、
プラスチックパイプのバット溶接、自動販売機の棚ヒー
タ等を含む多目的のために同じ温度若しくは異なる温度
に自己調節される対向面を有するヒータに関する。BACKGROUND OF THE INVENTION The present invention relates to a self-regulating two-sided heater, in particular,
The present invention relates to a heater having opposed surfaces that are self-regulated to the same or different temperatures for multiple purposes, including butt welding of plastic pipes, shelf heaters of vending machines, and the like.

プラスチックパイプのバット溶接において、パイプ端
部は、各々カートリッジ式ヒータにより溶融温度まで加
熱されるが、この熱がハウジング全体を加熱するため、
極めて非効率的である。この課題は、ハウジングが大き
くて、アルミニウム製である場合、加熱する全体が相当
量になるため増幅される。また、この装置は非常に重く
て使いにくい。さらに、この装置の温度分布は良くな
く、長い加熱時間及び冷却時間が必要とされる。In butt welding of plastic pipes, the pipe ends are each heated to the melting temperature by a cartridge type heater, but since this heat heats the entire housing,
Extremely inefficient. This problem is exacerbated when the housing is large and made of aluminum because the entire heating is considerable. Also, this device is very heavy and difficult to use. Furthermore, the temperature distribution of this device is not good and long heating and cooling times are required.

自動販売機の分野において、加熱する食品は、機械か
ら取り出してマイクロ波オーブン又は他の方式のオーブ
ンで加熱される。スープなどの食品が金属製の缶に詰め
られていて、マイクロ波を使用する場合、食品はその缶
から取り出し、非金属製の皿に載せて加熱される。昼食
時には、自分の食品を加熱する順番を待つ長い列がマイ
クロ波オーブンの前にできる。In the field of vending machines, the food to be heated is removed from the machine and heated in a microwave oven or other type of oven. If food such as soup is packed in a metal can and microwaves are used, the food is removed from the can and placed on a non-metallic dish and heated. At lunch, a long line in front of the microwave oven waits for a turn to heat your food.

本発明の目的 本発明の目的は、２つの平行な強磁性部材をキュリー
温度に加熱するため１つのパンケーキ誘導コイル若しく
は２つの独立して励起されるパンケーキ誘導コイルを用
いた二面ヒータを提供することである。OBJECT OF THE INVENTION An object of the present invention is to provide a two-sided heater using one pancake induction coil or two independently excited pancake induction coils to heat two parallel ferromagnetic members to the Curie temperature. To provide.

本発明のもう１つの目的は、軽量で、比較的小さく、
物理的に管理が容易な、２つの平行プレートを加熱する
ための構造体を提供することである。Another object of the invention is to be lightweight, relatively small,
It is to provide a structure for heating two parallel plates that is physically easy to manage.

本発明の更にもう１つの目的は、各プレート若しくは
各組みプレートが温度の異なるプレートと簡単に交換で
きる二重プレート・ヒータを提供することである。Yet another object of the present invention is to provide a dual plate heater in which each plate or each assembled plate can be easily replaced with a different temperature plate.

本発明の更に別の目的は、各プレートの熱負荷を有す
る領域にのみ大きな熱を供給する二重プレート・ヒータ
を提供することである。It is yet another object of the present invention to provide a dual plate heater that provides significant heat only to the area of each plate having a thermal load.

本発明の更に別の目的は、１つ、２つ又はそれ以上の
電気コイルからの誘導電流で加熱される２重プレート・
ヒータを提供することである。Yet another object of the invention is to provide a dual plate heated by induced current from one, two or more electric coils.
It is to provide a heater.

本発明の更に別の目的は、支持体に熱が殆ど伝わらな
いため、従来のヒータと比較して加熱及び冷却時間が相
当に短くて済む、プラスチックパイプのバット溶接に用
いる二重プレート・ヒータを提供することである。Yet another object of the present invention is to provide a dual plate heater for use in butt welding plastic pipes, in which substantially no heat is transmitted to the support, so that the heating and cooling time is considerably shorter than that of a conventional heater. To provide.

本発明の更に別の目的は、自動販売機の加熱棚若しく
はクッキング棚として使用する二重プレート・ヒータを
提供することである。It is yet another object of the present invention to provide a dual plate heater for use as a heating or cooking shelf in a vending machine.

本発明の概要 本発明は、好ましくは、同じ又は同じでないキュリー
温度を有し、それぞれの負荷が加熱される温度に応じて
選択される２つのほぼ平行な強磁性プレートと、該プレ
ートの間にこれらと平行に位置する少なくとも１つの好
ましくはパンケーキ・コイルとから成り、もってコイル
が高周波電流によって励起された際、プレートはほぼそ
れぞれのキュリー温度に加熱される。SUMMARY OF THE INVENTION The present invention preferably comprises two substantially parallel ferromagnetic plates, having the same or unequal Curie temperatures, selected according to the temperature at which each load is heated, between the plates. They consist of at least one, preferably pancake coil, located parallel to the plate, so that when the coil is excited by a high-frequency current, the plate is heated to approximately the respective Curie temperature.

このヒータは、プレートがそれぞれのキュリー温度に
達するまでヒータを励起し、次いでヒータを除去しなが
ら接合するパイプの端部をプレートに当接させ、溶接を
完成するため適当な軸方向の圧力をかけながらそのパイ
プ端部同士を接合することにより、プラスチック・パイ
プのパット溶接に利用できる。The heater excites the heater until the plates reach their respective Curie temperatures, then removes the heater, butts the end of the joining pipe against the plate and applies the appropriate axial pressure to complete the weld. While joining the pipe ends, it can be used for pad welding of plastic pipes.

種々の形状のコイル構造及びコイル・ヒータ・プレー
ト構造が本明細書に記載されている。１の形状によれ
ば、丸ワイヤが熱的及び電気的絶縁材料に埋設されてお
り、ヒータ・プレートは、絶縁体の各側に設けられてい
る。熱絶縁体が遮る結果、コイルの温度がプレート温度
より遥かに高くなり、コイルが高温になる前に全作業が
素早く終了しない限り、コイルの寿命が短くなることが
分った。常に可能とは限らない急速加熱が得られない場
合、コイルの最終温度は一定の電力で常に同じである。
そこまで到達するのにより長い時間を要するが、とにか
く行き着くことができる。コイルの温度を制御するため
冷却してもよい。Various configurations of coil structures and coil heater plate structures are described herein. According to one configuration, a round wire is embedded in a thermally and electrically insulating material, and a heater plate is provided on each side of the insulator. It has been found that as a result of the thermal insulation, the coil temperature is much higher than the plate temperature and the life of the coil is shortened unless the entire operation is completed quickly before the coil becomes hot. If rapid heating, which is not always possible, is not obtained, the final temperature of the coil is always the same with constant power.
It takes longer to get there, but you can get there anyway. Cooling may be used to control the temperature of the coil.

本発明の好ましい実施例において、熱伝導性材料製の
平坦な本体は、ヒータ・プレートとコイルとの間に配置
されてこれらの間に良好な熱通路を形成する。プレート
の熱は負荷に伝達され、コイルの温度がプレートの温度
より高い限り、熱エネルギーがコイルから熱伝導性材料
を通ってプレートに伝達される。実際上、プラスチック
パイプの端部を溶融するのに必要な温度は500゜Ｆ〜600
゜Ｆであろう。銅などはこの温度に耐えられる。従っ
て、コイルを熱的及び物理的にプレートに近接して配置
することにより、磁束移動が向上し、重要なことにコイ
ル（損失I2R）の熱エネルギーは、コイル温度がプレー
ト温度より高くなった時にプレートに伝達される。コイ
ルは熱エネルギーを最小限とするように設計すべきであ
るが、熱が生成される限り、プレートの加熱に適した形
状で使用される。平巻きコイルは平打巻きコイルより生
成する熱量が少なく、コイルの温度がプレート温度より
高い許容温度に維持されると分った。In a preferred embodiment of the present invention, a flat body made of a thermally conductive material is disposed between the heater plate and the coil to provide a good thermal path therebetween. The heat of the plate is transferred to the load, and as long as the temperature of the coil is higher than the temperature of the plate, heat energy is transferred from the coil through the thermally conductive material to the plate. In practice, the temperature required to melt the end of the plastic pipe is between 500 ° F and 600 ° F.
It would be $ F. Copper and the like can withstand this temperature. Therefore, placing the coil thermally and physically close to the plate improves flux transfer and, importantly, the thermal energy of the coil (loss I 2 R) is such that the coil temperature is higher than the plate temperature When it is transmitted to the plate. The coil should be designed to minimize thermal energy, but as long as heat is generated, it is used in a shape suitable for heating the plate. It has been found that flat wound coils generate less heat than flat wound coils and that the temperature of the coil is maintained at an allowable temperature higher than the plate temperature.

現在の最適コイルは高導電性の銅、例えば、幅0.3イ
ンチ、厚さ0.062インチの矩形断面の銅110の合金で形成
されていると分った。コイルは、巻き間スペースを0.1
インチとして平うず巻きで７回と3/4巻かれている。コ
イルは、現在のところ、アルミニウム合金1100のプレー
トの両面に合金42−６を15ミル有する厚さ約1/8のヒー
タ・プレートと共に使用されている。コイル及びプレー
トの直径はほぼ同じであり、コイルの直径は、約8.4イ
ンチで、そのピッチは凡そ0.4インチある。The current optimum coil has been found to be formed of a highly conductive copper, for example, an alloy of copper 110 having a rectangular cross section of 0.3 inches wide and 0.062 inches thick. The coil has a space between turns of 0.1
It is wound 7 times and 3/4 in flat spirals as inches. The coil is currently used with an approximately 1/8 thick heater plate having 15 mils of alloy 42-6 on both sides of an aluminum alloy 1100 plate. The diameter of the coil and plate are approximately the same, the diameter of the coil is about 8.4 inches, and the pitch is approximately 0.4 inches.

コイルとプレートの間には、熱伝導性電気絶縁コンパ
ウンドを用いなければならない。さもなければ、コンパ
ウンドによってコイルが短絡してしまう。しかしなが
ら、この材料は極めて薄く、例えば約0.15インチにしな
ければならず、熱の伝達能力がよいものでなければなら
ない。このような材料の１つは、酸化マグネシウムをベ
ースとしたものであり、コートロニクス・コーポレーシ
ョン（Coatronics Corp.）が型番906の下で販売してい
る。この材料は、40BTU in/hr′Ｆの熱伝導率を有す
る。A thermally conductive electrically insulating compound must be used between the coil and the plate. Otherwise, the compound will short the coil. However, this material must be very thin, for example, about 0.15 inches, and must have good heat transfer capabilities. One such material is based on magnesium oxide and is sold under the model number 906 by Coatronics Corp. This material has a thermal conductivity of 40 BTU in / hr'F.

二重プレート・ヒータは、例えば、商品を上下から挟
んで加熱する、自動販売機の調理棚若しくは加熱棚とし
て使用される。商品の要求があると、プレートの特定領
域が一定時間加熱され、次いで加熱が中止され、最後に
商品が排出される。The double plate heater is used, for example, as a cooking shelf or a heating shelf of a vending machine for heating a product from above and below. When a product is requested, a specific area of the plate is heated for a certain period of time, then the heating is stopped, and finally the product is discharged.

本発明の更に別の実施例において、ヒータを種々の形
状に変形できるよう、例えばパイプにサドル弁を接続す
るため曲折できるように網ワイヤの形態の強磁性体が用
いられている。ワイヤは、これに流れる交流電流又は誘
導によって加熱される。In yet another embodiment of the present invention, a ferromagnetic material in the form of a mesh wire is used so that the heater can be deformed into various shapes, for example, bendable to connect a saddle valve to a pipe. The wire is heated by alternating current or induction flowing through it.

１つ又は２つのコイルを用いてもよい。また、コイル
は、各プレートにより異なる温度に加熱する必要がある
場合、異なるキュリー温度を有する２つのプレートと共
に使用される。One or two coils may be used. Also, the coil is used with two plates having different Curie temperatures if each plate needs to be heated to a different temperature.

本明細書において「キュリー温度」なる言葉は、プレ
ートが、加熱が減少して冷却が始まる、十分な強磁性を
失う温度を意味する。この現象は幾つかの周知の方法で
検知することができ、使用する強磁性体に応じて絶対キ
ュリー温度以下１℃〜100℃で起きる。As used herein, the term "Curie temperature" refers to the temperature at which a plate loses sufficient ferromagnetism at which heating decreases and cooling begins. This phenomenon can be detected by several well-known methods and occurs between 1 ° C. and 100 ° C. below the absolute Curie temperature, depending on the ferromagnet used.

本明細書中、「強磁性体」なる言葉は、導電性強磁性
体、フェリ磁性体、フェライト、一定の温度で透磁率の
多くを失うその他の材料を含む。As used herein, the term "ferromagnetic material" includes conductive ferromagnetic materials, ferrimagnetic materials, ferrites, and other materials that lose much of their magnetic permeability at a certain temperature.

定電流電源の使用の結果、有効加熱の種焉が起る。電
流は、Ｐ＝I2Rである。電流が一定であれば、I2＝Ｋ、
Ｐ＝KRとなる。キュリー温度に近づくと、プレートに対
する磁束結合は大きく減少し、プレートにおけるうず電
流及びヒステリシス損が減少し、材料が再び有効強磁性
になって加熱が継続されるまで温度が下がる。この点に
ついては、米国特許第4,256,945号を参照されたい。キ
ュリー温度の関数として加熱を制御する他の方法は米国
再発行特許第33,644号及び米国特許第4,795,886号に記
載されており、後者には、本発明による装置の好ましい
キュリー温度制御方法が開示されている。The use of a constant current power supply results in a seed of effective heating. The current is P = I 2 R. If the current is constant, I 2 = K,
P = KR. As the Curie temperature is approached, flux coupling to the plate is greatly reduced, eddy currents and hysteresis losses in the plate are reduced, and the temperature is reduced until the material is again effective ferromagnetic and heating is continued. In this regard, see U.S. Patent No. 4,256,945. Other methods of controlling heating as a function of Curie temperature are described in U.S. Pat.Reissue No. 33,644 and U.S. Pat.No. 4,795,886, which discloses a preferred method of controlling the Curie temperature of an apparatus according to the present invention. I have.

図面の簡単な説明 図１は、本発明の基本実施例の側部断面図である。BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a side sectional view of a basic embodiment of the present invention.

図２は、コイルからヒータ・プレートまでの磁束結合
を示す概略図である。FIG. 2 is a schematic diagram showing magnetic flux coupling from a coil to a heater plate.

図3a−ｆは、種々の形状のヒータ・プレートの斜視図
である。3a-f are perspective views of heater plates of various shapes.

図４は、従来のヒータ構造の断面図である。 FIG. 4 is a sectional view of a conventional heater structure.

図５は、本発明の二重層コイルの実施例の断面図であ
る。FIG. 5 is a sectional view of an embodiment of the double-layer coil of the present invention.

図６は、２つの層が絶縁層で分離された二重層コイル
の断面図である。FIG. 6 is a cross-sectional view of a double-layer coil in which two layers are separated by an insulating layer.

図７は、各プレートに１つの２つのコイルを並列接続
した回路図である。FIG. 7 is a circuit diagram in which two coils are connected in parallel to each plate.

図８は、各プレートに１つの２つのコイルを直列接続
した回路図である。FIG. 8 is a circuit diagram in which two coils, one for each plate, are connected in series.

図９は、並列接続されたコイルを含む実施例の断面図
である。FIG. 9 is a sectional view of an embodiment including coils connected in parallel.

図10は、フェライト材の層で分離して並列接続された
コイルの断面図である。FIG. 10 is a cross-sectional view of coils connected in parallel separated by a layer of ferrite material.

図11は、２つの層がフェライト材で分離された単一二
層コイルの断面図である。FIG. 11 is a cross-sectional view of a single double-layer coil in which two layers are separated by a ferrite material.

図12は、絶縁層で分離して並列接続された２コイルの
断面図である。FIG. 12 is a cross-sectional view of two coils separated in parallel by an insulating layer and connected in parallel.

図13は、本発明によるヒータを内蔵する実用工具の斜
視図である。FIG. 13 is a perspective view of a practical tool incorporating a heater according to the present invention.

図14は、バット溶接するパイプ端部を加熱すべく使用
中の、図13の実用工具の斜視図である。FIG. 14 is a perspective view of the utility tool of FIG. 13 being used to heat the end of the pipe to be butt welded.

図15は、二重プレート・ヒータを棚として使用する装
置の概略斜視図である。FIG. 15 is a schematic perspective view of an apparatus using a double plate heater as a shelf.

図16は、固体プレートの代りに網メッシュを用いたヒ
ータの斜視図である。FIG. 16 is a perspective view of a heater using a net mesh instead of a solid plate.

図17は、図16のヒータの変形例の斜視図である。 FIG. 17 is a perspective view of a modification of the heater of FIG.

図18は、本発明の好適実施例によるヒータ・コイルと
ヒータ・プレートのサンドイッチ構造の概略図である。FIG. 18 is a schematic diagram of a sandwich structure of a heater coil and a heater plate according to a preferred embodiment of the present invention.

図19は、図18の実施例に用いられるコイルの斜視図で
ある。FIG. 19 is a perspective view of a coil used in the embodiment of FIG.

本発明の詳細な説明 図１を参照すれば、本発明の基本構成が示されてい
る。ヒータ２は、耐火材製のプレート６、８間に位置す
るリッツ線、導電性チューブ等で形成された平形コイル
４を有する。図示実施例において、コイルは、プレート
からの絶縁、離隔し、コイルを所定位置に保持する等の
種々の目的のためエポキシ系材料、発泡材或いは他の類
似材料に埋め込まれている。ヒータ・プレート、特に、
強磁性体プレート10、12は、最も簡素な基本構成を完成
させるべく耐火材料６、８に接触するように配置されて
いる。プレート10、12の面には、粘着性をなくすためテ
フロン・コーティング17、19が施してもよい。また、銅
やアルミニウムなどの熱伝導性の高い金属13、15をプレ
ート10、12とテフロン・コーティングとの間に配設して
もよい。コイル材料として導電性チューブを使用する場
合、これを中空とし、空気、水等で冷却すればよい。DETAILED DESCRIPTION OF THE INVENTION Referring to FIG. 1, there is shown a basic configuration of the present invention. The heater 2 has a flat coil 4 formed of a litz wire, a conductive tube, or the like, located between the plates 6 and 8 made of a refractory material. In the illustrated embodiment, the coil is embedded in an epoxy-based material, foam, or other similar material for various purposes, such as insulating from the plate, separating the coil, holding the coil in place, and the like. Heater plate, especially
The ferromagnetic plates 10, 12 are arranged in contact with the refractory materials 6, 8 to complete the simplest basic configuration. The surfaces of the plates 10, 12 may be provided with a Teflon coating 17, 19 to eliminate stickiness. Also, metals 13 and 15 having high thermal conductivity such as copper and aluminum may be provided between the plates 10 and 12 and the Teflon coating. When a conductive tube is used as a coil material, it may be hollow and cooled with air, water, or the like.

符号14で示される、再発行米国特許第33,644号又は米
国特許第4,795,886号に記載の高周波源、或いは、定電
流源へのコイル４の接続の際、ラジオ波（RF）電源、即
ち無線波電源14は、プレート内に熱を生成すべくうず電
流及びヒステリシス損失を発生させながらプレート１、
12をリンクする不連続又は連続の交番電磁界を生成する
（図２参照）。キュリー温度に達すると、プレート10、
12へのエネルギー伝達が大幅に減少し、プレートは、熱
を生成するよりも速く消失し、再び有効な強磁性体にな
って熱の生成が熱消失水準より高くなるまで冷える。こ
の作用は殆ど瞬間的であり、常温状態が保たれる。When connecting the coil 4 to a high frequency source or a constant current source as shown in reissued U.S. Pat. No. 33,644 or U.S. Pat. No. 4,795,886, indicated at 14, a radio frequency (RF) power supply, 14, plate 1 while generating eddy current and hysteresis loss to generate heat in the plate,
Generate a discontinuous or continuous alternating electromagnetic field linking 12 (see FIG. 2). When the Curie temperature is reached, plate 10,
The energy transfer to 12 is greatly reduced and the plate disappears faster than it produces heat and cools again until it becomes an effective ferromagnet and the heat production is above the heat dissipation level. This action is almost instantaneous, and a normal temperature state is maintained.

プレート10、12は、丸形、Ｃ字形、矩形、カップ形、
Ｌ字形等の所望の形状とされ、予定されるヒータの使用
状況に応じてその形が決定される。図3a−ｆを参照され
たい。Plates 10 and 12 are round, C-shaped, rectangular, cup-shaped,
The shape is determined to be a desired shape such as an L-shape, and the shape is determined according to the expected use condition of the heater. See Figures 3a-f.

図４を参照すれば、構造的に強固なものとするコイル
４がセラミック材若しくは鋳造材（アルミニウムなど）
ハウジング14に埋設された従来型ヒータが示されてい
る。従来型のヒータの好適実施例には、カルロッド（Ca
lrod）ヒータが用いられている。Referring to FIG. 4, the coil 4 to be structurally strong is made of a ceramic material or a cast material (such as aluminum).
A conventional heater embedded in the housing 14 is shown. Preferred embodiments of conventional heaters include cal rods (Ca
lrod) A heater is used.

二重層コイル、即ち、並列に接続するのが好ましいが
直列接続された２つの分離コイル層の主たる利点は、キ
ュリー温度が異なる２つのヒータ・プレートが使用でき
ることである。このような状況で単層コイルを使用して
もよいが、一方のプレートがキュリー温度に達した際に
磁束が主に他方のプレートに結合して温度制御に影響す
るため、両プレートのキュリー温度間の相互作用が避け
られない。The main advantage of a double layer coil, i.e. two separate coil layers preferably connected in parallel but connected in series, is that two heater plates with different Curie temperatures can be used. In such a situation, a single-layer coil may be used, but when one of the plates reaches the Curie temperature, the magnetic flux mainly couples to the other plate and affects the temperature control. Interaction between them is inevitable.

多層コイル、特に、層間に絶縁層を有するものを使用
すればある程度の減結合が達成される。コイルの層間に
フェライト材を用いれば、追加の減結合が得られ、高い
キュリー温度のプレートの温度制御が向上する。直列接
続された２つの分離コイルの使用は動程（performanc
e）を向上させるが、最良の結果は、コイル間にフェラ
イト材を配して並列接続された２つのコイルによって得
られる。このような場合、特に電源が２つのコイルに対
する同時の負荷によって負荷過剰とならないような場
合、２つの負荷の完全な分離が達成される。A certain degree of decoupling is achieved by using multilayer coils, especially those having an insulating layer between the layers. The use of ferrite material between the layers of the coil provides additional decoupling and improves the temperature control of high Curie temperature plates. The use of two separate coils connected in series requires a performanc
Although e) is improved, the best results are obtained with two coils connected in parallel with a ferrite material between the coils. In such a case, complete separation of the two loads is achieved, especially if the power supply is not overloaded by simultaneous loading on the two coils.

上記の事情は、２つのプレートのキュリー温度が同じ
で、熱負荷が実質的に異なる場合にも当てはまる。この
ような場合、一方のプレートが他方のプレートより先に
キュリー温度に達し、プレートの相互作用を避けること
が望ましい。The above situation also applies when the Curie temperatures of the two plates are the same and the heat loads are substantially different. In such a case, it is desirable that one plate reach the Curie temperature before the other plate to avoid plate interaction.

図５を参照すれば、コイル16は、上述の理由により、
また、ヒータに追加のエネルギーを与えるため、特によ
り大きな磁束集中をプレートに付与するため、二層に巻
かれている。Referring to FIG. 5, the coil 16 is provided for the reasons described above.
It is also wound in two layers to provide additional energy to the heater, especially to provide greater flux concentration to the plate.

図６において、絶縁体18は、２つのコイル20間に配置
されてこれらの間にある程度の減結合を達成する。図６
の絶縁体18は、コイルの磁束のクロス結合を減少させ、
この構成は、図５の構成よりも効率的である。図５の構
成において、２つのコイルの相互接近によって、磁界消
滅効果が発生し、これにより図６の構成がより効率的な
ものとなる。In FIG. 6, an insulator 18 is placed between the two coils 20 to achieve some decoupling between them. FIG.
Insulator 18 reduces cross-coupling of coil magnetic flux,
This configuration is more efficient than the configuration of FIG. In the configuration of FIG. 5, a magnetic field extinguishing effect occurs due to the mutual approach of the two coils, which makes the configuration of FIG. 6 more efficient.

このコイルは、並列又は直列に接続された２つの別個
のコイルとして巻いたものであるが、並列構造のものは
直列のものより大きなエネルギーを装置に供給するとと
もに、追加の減結合をもたらす。上述したように、並列
構造のものは、２つのプレートが異なるキュリー温度を
有する場合に特に有益である。単一コイル又は２つの直
列コイルをこのような構造とすると、コイル間に相互作
用が発生して、即ち互いに影響しあって、単一コイルの
温度調節が並列接続コイルより不良となってしまう。単
一コイル若しくは直列コイル構造は、このような状況下
で満足できるものであるが、並列接続コイル構造の方が
望ましい。The coil is wound as two separate coils connected in parallel or in series, but the parallel configuration provides more energy to the device than the series and provides additional decoupling. As mentioned above, the side-by-side configuration is particularly beneficial when the two plates have different Curie temperatures. When a single coil or two series coils are configured in this manner, interaction occurs between the coils, that is, they affect each other, so that the temperature control of the single coil is poorer than that of the parallel connection coil. While a single coil or series coil configuration is satisfactory under these circumstances, a parallel connection coil configuration is preferred.

並列構造装置の回路は図７に示されており、直列構造
装置の回路は図８に示されている。The circuit of the parallel structure device is shown in FIG. 7, and the circuit of the series structure device is shown in FIG.

並列に接続された二重層コイルの構成は図９に示され
ている。第１のコイル22は、リード線24、26の間に接続
されており、第２のコイル28は、リード線30、32を横切
るように接続されている。リード線24、32がリード線源
34に接続されているのに対し、リード線26、30はリード
線源36に接続されている。The configuration of the double-layer coil connected in parallel is shown in FIG. The first coil 22 is connected between the leads 24, 26, and the second coil 28 is connected across the leads 30, 32. Lead wires 24 and 32 are lead wire sources
The leads 26, 30 are connected to a lead source 36 while being connected to 34.

図10に示された構成は、図９のものと基本的に同じで
あるが、該プレートを使用した場合よりも大きい磁束集
中をヒータ・プレート40、42において達成すべくコイル
22、28の間にフェライト・プレート38が設けられている
点で異なる。フェライトを用いると、コイルからの磁束
がフェライトの他側のコイルから適度に遮蔽され、この
装置は各実施例のコイル及びプレートの最適な遮蔽を達
成する。The configuration shown in FIG. 10 is basically the same as that of FIG. 9 except that the coil concentration is increased in the heater plates 40, 42 to achieve a higher magnetic flux concentration than when using the plate.
The difference is that a ferrite plate 38 is provided between 22 and 28. With ferrite, the magnetic flux from the coil is adequately shielded from the coil on the other side of the ferrite, and the device achieves optimal shielding of the coils and plates of each embodiment.

図11を参照するに、２層単コイル40は、フェライト層
42によって分離された層を有する。Referring to FIG. 11, the two-layer single coil 40 has a ferrite layer.
With layers separated by 42.

図12は、絶縁層48によって分離され、並列に接続され
た二重コイル44、46を示す。FIG. 12 shows dual coils 44, 46 separated by an insulating layer 48 and connected in parallel.

図13は、本発明の実用的実施例を示す。装置61は、ハ
ウジング52に取着された二重プレート・ヒータ50を含
む。ハウジング62は、ハンドル56で終結する長尺アーム
54を有する。ハウジングは、溶融するパイプの加熱に使
用する構造体を支持するための傾斜プレート58、60を有
していてもよい。傾斜プレート58、60の表面は、隣接部
材への熱伝導を減じるため熱絶縁体で被覆してもよい。FIG. 13 shows a practical embodiment of the present invention. Apparatus 61 includes a dual plate heater 50 mounted to housing 52. The housing 62 is a long arm that terminates at the handle 56
Has 54. The housing may have inclined plates 58, 60 for supporting the structure used to heat the pipe to be melted. The surfaces of the inclined plates 58, 60 may be coated with a thermal insulator to reduce heat conduction to adjacent members.

図13の説明において言及した装置61が図14に示されて
いる。全体装置62は、図13の傾斜プレート58、60間の距
離だけ離隔する一対の平行レール64、66を含む。ハンド
ル56を使って図13の装置を操作すると、装置はレール間
に配置され、傾斜プレート58、60がそれぞれレール64、
66に載る。ヒータ・プレートは、コイルの励起によって
キュリー温度まで加熱され、バット溶接されるパイプ6
8、70が二重プレート・ヒータの両プレートに当接す
る。２つのプレートがキュリー温度を達成すると、パイ
プがプレートに当接せしめられ、溶融温度に加熱され、
装置61が除去され、加熱されたパイプ端部が溶接される
まで互いに突き合されて圧接される。The device 61 mentioned in the description of FIG. 13 is shown in FIG. The overall device 62 includes a pair of parallel rails 64, 66 separated by the distance between the inclined plates 58, 60 of FIG. When the device of FIG. 13 is operated with the handle 56, the device is positioned between the rails and the inclined plates 58, 60
On 66. The heater plate is heated to the Curie temperature by the excitation of the coil and the butt-welded pipe 6
8, 70 contact both plates of the double plate heater. Once the two plates have reached the Curie temperature, the pipe is brought into contact with the plates and heated to the melting temperature,
The device 61 is removed and the heated pipe ends are butted and pressed together until welded.

パイプをヒータ・プレートと適正に整列させ、次いで
パイプ自体を整列させるのを補助するため、レール64、
66の間にパイプの位置決め装置72、74を配置してもよ
い。装置72と74との間の距離は、２重プレート・ヒータ
の挿入を許容する程度とする。Rails 64, to help properly align the pipe with the heater plate and then the pipe itself
Between the 66, pipe positioning devices 72, 74 may be arranged. The distance between devices 72 and 74 should be sufficient to allow the insertion of a double plate heater.

図15をを参照すれば、加熱される商品が容器の棚の間
に配置された装置が示されている。棚80、82および84
は、いずれも二重プレート・ヒータである。加熱される
負荷86は、棚80、82の間に配置されており、熱負荷88
は、棚82の間に分散している。Referring to FIG. 15, there is shown an apparatus in which a product to be heated is located between shelf shelves of a container. Shelves 80, 82 and 84
Are double plate heaters. The load 86 to be heated is located between the shelves 80, 82, and the heat load 88
Are distributed between the shelves 82.

各棚は、図１、４〜12に示されたいずれかのタイプの
二重プレート・ヒータであり、棚80の底部及び棚82の頂
部は好ましくは同じキュリー温度を有する。同様に棚82
の底部および棚84の頂部は、好ましくは同じキュリー温
度を有する。Each shelf is a double plate heater of any type shown in FIGS. 1, 4-12, wherein the bottom of shelf 80 and the top of shelf 82 preferably have the same Curie temperature. Similarly Shelf 82
And the top of shelf 84 preferably have the same Curie temperature.

商品を加熱する際、その所望商品と接するプレートが
励起される。棚は、一定の位置に加熱領域を有し、商品
は、排出若しくは使用に先立って加熱される際に加熱領
域と接触せしめられる。これに代えて、棚を強磁性体と
し、棚が排出位置まで回転するようになっている場合に
その回転時にそれぞれ電源に接続された個々のコイルに
よって形成された複数の加熱領域を有していてもよい。As the product is heated, the plate in contact with the desired product is excited. The shelf has a heating area at a fixed location, and the goods are brought into contact with the heating area as they are heated prior to discharge or use. Alternatively, the shelf is made of a ferromagnetic material, and has a plurality of heating regions formed by individual coils connected to a power source when the shelf is rotated to the discharge position when the shelf is rotated. You may.

図16を参照すれば、カーボン・ファイバ、液晶材等の
強い、非磁性熱伝導性プラスチックに埋設された強磁性
体メッシュを利用したヒータが図示されている。このよ
うな構成の利点は２つある。ワイヤメッシュは、ヒータ
及び強磁性部材として働くほか、可撓性を有する。これ
は、実際にいかなる形状にも形成でき、サドル弁をプラ
スチック・パイプ及びその他の非平坦構造のもの若しく
は不規則形状のものに融接するのに容易に再使用でき
る。Referring to FIG. 16, there is illustrated a heater utilizing a ferromagnetic mesh embedded in a strong, non-magnetic, thermally conductive plastic such as carbon fiber or liquid crystal material. There are two advantages of such a configuration. The wire mesh acts as a heater and a ferromagnetic member, and has flexibility. It can be formed into virtually any shape and can be easily reused to fuse the saddle valve to plastic pipes and other irregular or irregular shapes.

このヒータの基本思想は、図16に示されており、強磁
性クロス線90及び強磁性垂直線92を有する。これらの線
は編み上げ形成されており、メッシュは、上述したリー
ド線94、96を介して電流を流すことによって加熱される
連続ワイヤで形成されている。これらのワイヤは、キュ
リー温度制御を向上するため強磁性体でコーティングさ
れた導電性材料で形成すればよい。２つのヒータ面に１
つずつの２つのこういった部材が利用されており、第２
部材は線90′及び92′を含む。The basic idea of this heater is shown in FIG. 16 and has a ferromagnetic cross line 90 and a ferromagnetic vertical line 92. These wires are braided and the mesh is made of a continuous wire that is heated by passing an electric current through the leads 94, 96 described above. These wires may be formed of a conductive material coated with a ferromagnetic material to improve Curie temperature control. One for two heater surfaces
Two such members are used each,
The member includes lines 90 'and 92'.

これに代えて、ワイヤは、高周波磁界によって加熱し
てもよく、この場合ワイヤは互いに絶縁する必要がな
い。図１、２及び５乃至11のいずれのコイル構造を使用
してもよい。このような装置は図17にしめされている。Alternatively, the wires may be heated by a high frequency magnetic field, in which case the wires need not be insulated from each other. Any of the coil structures of FIGS. 1, 2 and 5 to 11 may be used. Such a device is shown in FIG.

図17を参照するに、ワイヤ90および90′は、コイル10
4を内包する部材102の面98、100に隣接して配設されて
いる。コイルは、メッシュのキュリー点制御反応を妨害
しないように非熱伝導性プラスチックに埋設されてい
る。Referring to FIG. 17, wires 90 and 90 'are
4 is disposed adjacent to the surfaces 98 and 100 of the member 102 containing the 4. The coil is embedded in a non-thermally conductive plastic so as not to interfere with the Curie point control reaction of the mesh.

さらに図18および19を参照すれば、本発明の種々の好
適実施例が図示されている。With further reference to FIGS. 18 and 19, various preferred embodiments of the present invention are illustrated.

この実施例において、単体ヒータコイル106は、好ま
しくは、２つのヒータ・プレート108、110の間に把持さ
れている。熱伝導性で電気絶縁性のポッティング材層11
2は、コイルと各プレートとの間に配設されている。市
販ユニットにおいて、要素の端部は、機械的強度を付加
するため材料112で被覆されている。In this embodiment, the unitary heater coil 106 is preferably gripped between two heater plates 108,110. Thermally conductive and electrically insulating potting material layer 11
2 is provided between the coil and each plate. In commercial units, the ends of the elements are coated with a material 112 to add mechanical strength.

コイルは、8.4インチのユニットで７回と3/4の平うず
巻き（flat spiral）（図19）とされている。上述の巻
き部は、0.3x0.062インチの110銅片を用い、約0.10イン
チ離して形成されている。コイルと１のプレートとの組
合わせの動程（performance）は、以下の表Ｉに示す通
りである。The coil is a 8.4 inch unit with 7 turns and 3/4 flat spiral (FIG. 19). The wraps described above are formed about 0.30 inches apart using 110 copper pieces of 0.3 × 0.062 inches. The performance of the combination of coil and one plate is shown in Table I below.

コイル及びプレートは、初めは同じ温度であることに
注目されたい。コイルに電流が送られた際、プレートは
強磁性体プレートの磁束の効果によって急速に熱せられ
る。ある程度の時間、本件の場合5.5分、経過後、プレ
ートの温度は、約489′〜490′Ｆの間で自動調節する
が、4.5分ではコイル温度はプレート温度を上回る。露
出していて負荷が与えられたプレートからの熱の消散が
埋設コイルからの場合より急速であるため、この場合の
コイル温度は、コイル線が耐えられる温度より遥か下の
535′Ｆ程度に落ち着く。従って、熱伝導性のポッティ
ング化合物を使用することにより、コイル温度はプレー
ト温度を上回り、プレート、次いで負荷へと熱を送り込
み、許容レベルで安定する。 Note that the coil and plate are initially at the same temperature. When current is applied to the coil, the plate is rapidly heated by the effect of the magnetic flux of the ferromagnetic plate. After some time, in this case 5.5 minutes, the plate temperature automatically adjusts between about 489'-490'F, but at 4.5 minutes the coil temperature exceeds the plate temperature. Because the heat dissipation from the exposed and loaded plate is more rapid than from the buried coil, the coil temperature in this case is much lower than the coil wire can tolerate.
Settles to about 535'F. Thus, by using a thermally conductive potting compound, the coil temperature is above the plate temperature, pumping heat to the plate and then to the load, and stabilizing at acceptable levels.

ヒータ・プレート及びコイルの冷却時間を次の表IIに
示す。The cooling time of the heater plate and coil is shown in Table II below.

コイルをポッティングするため、コイルはプレートよ
りも小さい比率で冷える。この表の数値は、９回巻きで
中央に1.24回余分に巻いたコイルを使って得たものであ
り、従って結果に殆ど影響がなかった。 To pot the coil, the coil cools at a lower rate than the plate. The values in this table were obtained using a coil with 9 turns and an extra 1.24 turn in the center, and therefore had little effect on the results.

コイルは、レーザ・エッチングで形成してもよく、ま
た、コストを下げるため前述のように所望端面の線を巻
いて形成してもよい。後者のやり方の場合、巻かれる線
およびスペーサ線をスタータ工具に挟み、この工具に巻
き付けられる。巻き付け後、スペーサ線は取り除かれ
る。The coil may be formed by laser etching, or may be formed by winding a wire of a desired end face as described above to reduce cost. In the latter case, the wire to be wound and the spacer wire are sandwiched between starter tools and wound around this tool. After winding, the spacer wire is removed.

幅、即ち径が一定のスペーサ線は、渦巻きの外側の部
分が内側の部分よりも解れ易いため適当でないと分っ
た。巻き回数の間のスペースを一様に0.10インチとする
ため、0.068インチのワイヤを最内巻きに使用するが、
外巻きには大き過ぎる。長さ28インチ内径0.068インチ
の線を内巻きに使用し、0.068インチの線の先には、長
さ50インチ内径0.053インチの線を使用した。次のよう
にするのが望ましいであろう。即ち、0.068インチ線を2
8インチ、続いて0.053インチ線を28インチ、その後、最
後の２〜３巻きにはスペーサ線を使わずに0.040インチ
線を使用する。コイルの最内半径は約0.832インチであ
る。It has been found that spacer wires of constant width, ie, diameter, are not suitable because the outer part of the spiral is easier to unravel than the inner part. In order to make the space between the number of turns evenly 0.10 inch, use a 0.068 inch wire for the innermost winding,
It's too big for outside winding. A 28 inch long 0.068 inch inside diameter wire was used for the inner winding, and a 0.068 inch long wire was used with a 50 inch long 0.053 inch inside diameter wire. It would be desirable to do the following: That is, 0.068 inch wire is 2
Use 8 inches followed by 28 inches of 0.053 inch wire, then use 0.040 inch wire without spacer wire for the last few turns. The innermost radius of the coil is about 0.832 inches.

一度開示すると他の多くの特徴、変更および改良が等
業者に明白となるが、これらの変更、特徴および改良は
以下のクレームに記載される本発明の範囲に属するもの
と考える。Once disclosed, many other features, changes and modifications will be apparent to those skilled in the art, which are considered to be within the scope of the invention as set forth in the following claims.

───────────────────────────────────────────────────── フロントページの続き (72)発明者 フィネガン、ジョエル・ディー アメリカ合衆国 94555 カリフォルニ ア、フレモント、ボドキン・テラス 34334 (56)参考文献 特開 昭62−227584（ＪＰ，Ａ) 米国特許4008118（ＵＳ，Ａ) ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Finnegan, Joel Dee United States 94555 California, Fremont, Bodkin Terrace 34334 (56) References JP-A-62-227584 (JP, A) US Patent 4,0081,118 (US, A)

Claims (23)

(57)【特許請求の範囲】(57) [Claims] 【請求項１】二面ヒータであって、 第１の強磁性部材と、 第２の強磁性部材と、 前記第１及び第２の強磁性部材間に位置し、励起時に前
記強磁性部材をそれぞれのキュリー温度附近で自己温度
調節せしめるのに十分なエネルギーを有する少なくとも
１つのコイルとから成り、 前記第１及び第２の強磁性部材並びに前記少なくとも１
つのコイルが、互いにほぼ平行に配設されて単一ユニッ
トとして構成された二面ヒータ。1. A two-sided heater, comprising: a first ferromagnetic member; a second ferromagnetic member; and a first ferromagnetic member, wherein the first ferromagnetic member is located between the first and second ferromagnetic members. At least one coil having energy sufficient to self-regulate near each Curie temperature, said first and second ferromagnetic members and said at least one coil.
A two-sided heater in which two coils are arranged almost parallel to each other and configured as a single unit. 【請求項２】前記コイルが、単層パンケーキ・コイルで
ある請求項１に記載の二面ヒータ。2. The two-sided heater according to claim 1, wherein said coil is a single-layer pancake coil. 【請求項３】前記コイルが、多層パンケーキ・コイルで
ある請求項１に記載の二面ヒータ。3. The two-sided heater according to claim 1, wherein said coil is a multilayer pancake coil. 【請求項４】前記第１及び第２の強磁性部材間に複数の
物理的に相互に独立のコイルが設けられている請求項１
に記載の二面ヒータ。4. The apparatus according to claim 1, wherein a plurality of physically independent coils are provided between said first and second ferromagnetic members.
A two-sided heater according to item 1. 【請求項５】前記物理的に独立のコイルが、直列に接続
されている請求項４に記載の二面ヒータ。5. The two-sided heater according to claim 4, wherein said physically independent coils are connected in series. 【請求項６】前記物理的に独立のコイルが、並列に接続
されている請求項４に記載の二面ヒータ。6. The two-sided heater according to claim 4, wherein said physically independent coils are connected in parallel. 【請求項７】前記複数のコイル間に位置する電気絶縁材
を更に有する請求項４乃至６のいずれか１項に記載の二
面ヒータ。7. The two-sided heater according to claim 4, further comprising an electric insulating material located between said plurality of coils. 【請求項８】前記電気絶縁材が、熱伝導性材の薄い層か
ら成る請求項７に記載の二面ヒータ。8. A two-sided heater according to claim 7, wherein said electrical insulation comprises a thin layer of a thermally conductive material. 【請求項９】前記複数のコイルが、薄い導電性材の平坦
渦巻きから成る請求項４に記載の二面ヒータ。9. The two-sided heater of claim 4, wherein said plurality of coils comprise flat spirals of thin conductive material. 【請求項１０】前記コイルが、薄い導電性材の平坦渦巻
きから成る請求項１に記載の二面ヒータ。10. The two-sided heater of claim 1 wherein said coil comprises a flat spiral of thin conductive material. 【請求項１１】前記複数のコイル間に位置するフェライ
ト材の層を更に有する請求項４乃至６のいずれか１項に
記載の二面ヒータ。11. The two-sided heater according to claim 4, further comprising a ferrite material layer located between said plurality of coils. 【請求項１２】前記第１及び第２の強磁性部材が一対の
強磁性体プレートから成り、前記コイルが前記プレート
の間に位置している請求項１に記載の二面ヒータ。12. The two-sided heater according to claim 1, wherein said first and second ferromagnetic members comprise a pair of ferromagnetic plates, and said coil is located between said plates. 【請求項１３】前記第１及び第２の強磁性部材の各々
が、非磁性の熱伝導性材に埋設された可撓性ワイヤ・メ
ッシュから成る請求項１に記載の二面ヒータ。13. A two-sided heater according to claim 1, wherein each of said first and second ferromagnetic members comprises a flexible wire mesh embedded in a non-magnetic, thermally conductive material. 【請求項１４】前記第１及び第２の強磁性部材の各々
が、非磁性の非熱伝導性材に埋設された可撓性ワイヤ・
メッシュから成る請求項１に記載の二面ヒータ。14. A flexible wire, wherein each of said first and second ferromagnetic members is embedded in a non-magnetic, non-thermally conductive material.
The two-sided heater according to claim 1, comprising a mesh. 【請求項１５】請求項１に記載の二面ヒータと、該二面
ヒータを支持するためのフレームと、から成り、該フレ
ームが前記ヒータを支持した状態において、該フレーム
が前記ヒータの面と平行に一方向に延びる長尺アームと
該アームの端部に設けられたハンドルと、を有する二面
ヒータ構造体。15. A two-sided heater according to claim 1, and a frame for supporting the two-sided heater, wherein the frame is in contact with the surface of the heater when the frame supports the heater. A two-sided heater structure including a long arm extending in one direction in parallel and a handle provided at an end of the arm. 【請求項１６】相反対方向に面したヒータ面を有する請
求項１に記載の二面ヒータの両面を、所定温度に加熱す
るステップと、 バット溶接されるパイプの端部を、それぞれ前記ヒータ
の各面まで移動するステップと、 前記パイプが溶接温度に達するまで、前記パイプを前記
ヒータ面に接触させておくステップと、 前記二面ヒータを取り外し、前記パイプの加熱された端
部同士を圧接し、溶接が完了するまで前記パイプ同士を
接触させておくステップと、 から成るプラスチック・パイプのバット溶接方法。16. The two-sided heater according to claim 1, wherein the two-sided heater has a heater surface facing in opposite directions, and heating the two sides of the two-sided heater to a predetermined temperature; Moving to each surface; and keeping the pipe in contact with the heater surface until the pipe reaches the welding temperature; removing the two-sided heater and pressing the heated ends of the pipe together. Contacting the pipes until welding is completed. A butt welding method for a plastic pipe, comprising: 【請求項１７】自動販売機における少なくとも一対の請
求項12に記載の二面ヒータから成る棚であって、前記少
なくとも一対の棚の対向する面がほぼ同じキュリー温度
を有し、 加熱される商品が、前記少なくとも一対の棚の間に配置
され、前記棚の対向する面が発生する熱によって加熱さ
れるようになっている棚。17. A shelf comprising at least a pair of two-sided heaters according to claim 12 in a vending machine, wherein the opposed surfaces of said at least one pair of shelves have substantially the same Curie temperature, and are heated. Is disposed between the at least one pair of shelves, and the opposed surfaces of the shelves are heated by generated heat. 【請求項１８】前記コイルが、定電流交流電源によって
励起される請求項１に記載の二面ヒータ。18. The two-sided heater according to claim 1, wherein said coil is excited by a constant current AC power supply. 【請求項１９】請求項１に記載の二面ヒータと、 一対の平行なレールと、 前記ヒータ面を前記レールの長さ方向に対し直交させた
状態で、前記ヒータを前記レール間に取り外し可能に支
持する手段と、 前記レールと平行に延びる溶接されるパイプを支持する
ための、該パイプの軸に沿って配設されたパイプ支持体
と、 から成るプラスチック・パイプを加熱溶接するための構
造体。19. The two-sided heater according to claim 1, a pair of parallel rails, and the heater can be removed between the rails in a state where the heater surface is orthogonal to the length direction of the rail. Means for supporting a welded pipe extending parallel to said rail, and a pipe support disposed along the axis of said pipe, the structure for heat welding plastic pipes. body. 【請求項２０】強磁性体の第１の可撓性ワイヤ構造体
と、 強磁性体の第２の可撓性ワイヤ構造体と、 非磁性体の構造体と、から成り、 前記第１及び第２のワイヤ構造体が、前記非磁性体の構
造体のほぼ相反対方向に向いた面に別個の熱源を提供す
るものとして、前記非磁性体の構造体中に支持されてお
り、 前記第１及び第２のワイヤ構造体を少なくともキュリー
温度に近い温度に加熱すべく、前記第１及び第２のワイ
ヤ構造体に電流を発生させ又は流すために、前記第１及
び第２のワイヤ構造体を少なくとも１つの電源に接続す
る手段を更に備える二面ヒータ。20. A ferromagnetic first flexible wire structure; a ferromagnetic second flexible wire structure; and a non-magnetic structure. A second wire structure supported in the non-magnetic structure as providing a separate heat source on a generally oppositely oriented surface of the non-magnetic structure; The first and second wire structures for generating or flowing current through the first and second wire structures to heat the first and second wire structures to at least a temperature close to the Curie temperature A two-sided heater, further comprising means for connecting to a power supply. 【請求項２１】強磁性体の第１の可撓性ワイヤ構造体
と、 強磁性体の第２の可撓性ワイヤ構造体と、 非磁性体の構造体と、から成り、 前記第１及び第２のワイヤ構造体が、前記非磁性体の構
造体のほぼ相反対方向に向いた面に別個の熱源を提供す
るものとして、前記非磁性体の構造体中に支持されてお
り、 前記第１及び第２のワイヤ構造体をそれぞれのキュリー
温度に加熱する手段であって、前記第１及び第２の可撓
性ワイヤ構造体を接続する交番磁束を発生させる手段を
更に備える二面ヒータ。21. A ferromagnetic first flexible wire structure; a ferromagnetic second flexible wire structure; and a non-magnetic structure. A second wire structure supported in the non-magnetic structure as providing a separate heat source on a generally oppositely oriented surface of the non-magnetic structure; A two-sided heater, further comprising means for heating the first and second wire structures to their respective Curie temperatures, wherein said means for generating an alternating magnetic flux connecting said first and second flexible wire structures. 【請求項２２】前記非磁性体が熱伝導性である請求項20
又は21に記載の二面ヒータ。22. The non-magnetic material is heat conductive.
Or the two-sided heater according to 21. 【請求項２３】前記非磁性体が非熱伝導性である請求項
20又は21に記載の二面ヒータ。23. The non-magnetic material is non-thermally conductive.
22. The two-sided heater according to 20 or 21.
JP5507954A 1991-10-23 1992-10-23 Double-sided heater Expired - Lifetime JP2662616B2 (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
US78097791A 1991-10-23 1991-10-23
US780,977 1991-10-23
PCT/US1992/009154 WO1993008668A1 (en) 1991-10-23 1992-10-23 Dual surface heaters

Publications (2)

Publication Number Publication Date
JPH06503206A JPH06503206A (en) 1994-04-07
JP2662616B2 true JP2662616B2 (en) 1997-10-15

Family

ID=25121271

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5507954A Expired - Lifetime JP2662616B2 (en) 1991-10-23 1992-10-23 Double-sided heater

Country Status (4)

Country Link
EP (1) EP0563374A1 (en)
JP (1) JP2662616B2 (en)
CA (1) CA2096725C (en)
WO (1) WO1993008668A1 (en)

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Also Published As

Publication number Publication date
JPH06503206A (en) 1994-04-07
CA2096725A1 (en) 1993-04-24
WO1993008668A1 (en) 1993-04-29
EP0563374A1 (en) 1993-10-06
EP0563374A4 (en) 1994-02-23
CA2096725C (en) 1998-04-07

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