JPH05200872A - Welding device - Google Patents
Welding deviceInfo
- Publication number
- JPH05200872A JPH05200872A JP3433692A JP3433692A JPH05200872A JP H05200872 A JPH05200872 A JP H05200872A JP 3433692 A JP3433692 A JP 3433692A JP 3433692 A JP3433692 A JP 3433692A JP H05200872 A JPH05200872 A JP H05200872A
- Authority
- JP
- Japan
- Prior art keywords
- welding
- heating
- synthetic resin
- pedestal
- welding device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- B29C65/38—Impulse heating
-
- 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
- B29C66/03—After-treatments in the joint area
- B29C66/034—Thermal after-treatments
- B29C66/0342—Cooling, e.g. transporting through welding and cooling zone
-
- 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
- B29C66/112—Single lapped joints
- B29C66/1122—Single lap to lap joints, i.e. overlap 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
- B29C66/40—General aspects of joining substantially flat articles, e.g. plates, sheets or web-like materials; Making flat seams in tubular or hollow articles; Joining single elements to substantially flat surfaces
- B29C66/41—Joining substantially flat articles ; Making flat seams in tubular or hollow articles
- B29C66/43—Joining a relatively small portion of the surface of said articles
-
- 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
- B29C66/70—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material
- B29C66/71—General aspects of processes or apparatus for joining preformed parts characterised by the composition, physical properties or the structure of the material of the parts to be joined; Joining with non-plastics material characterised by the composition of the plastics material of 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
- B29C66/80—General aspects of machine operations or constructions and parts thereof
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/832—Reciprocating joining or pressing tools
- B29C66/8322—Joining or pressing tools reciprocating along one axis
-
- 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
- B29C65/22—Heated wire resistive ribbon, resistive band or resistive strip
- B29C65/221—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip
- B29C65/222—Heated wire resistive ribbon, resistive band or resistive strip characterised by the type of heated wire, resistive ribbon, band or strip comprising at least a single heated wire
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Abstract
Description
【0001】[0001]
【技術分野】本発明は、溶着装置に関する。TECHNICAL FIELD The present invention relates to a welding device.
【0002】[0002]
【従来技術】昭和44年12月5日日刊工業新聞社発行
「プラスチック加工技術便覧」第765〜781頁に
は、溶着に関する事項が詳細に記述されており、そこに
は現在溶着できる樹脂として汎用されているポリ塩化ビ
ニル、ポリエチレン、ポリプロピレンのほかに、現在無
公害化のためポリ塩化ビニルの代替品と考えられている
ポリエチレンテレフタレート(PET)の上位概念に相
当するポリエステルがインパルスシールおよび超音波シ
ールにより溶着できる旨記載されている。この記載の根
拠は、その第765頁図3・22に示す方法により実験
室で実施した結果に基づくものである。たしかに、この
記載のように、肉厚0.1mm以下の浸熱の速い薄手の
ものについてはポリエチレンテレフタレートでも、ある
程度溶着は可能である。しかし、肉厚0.1mm以上と
くに0.2mm以上のポリエチレンテレフタレートは、
溶着部分が完全に白化、すなわち劣化を起し、溶着部分
が炭化変質して実質上溶着することは不可能であった。
そこで、肉厚のポリエチレンテレフタレートの接着には
ホットメルト接着剤の使用が試みられているが、能率が
悪い上、コストがかさんでしまう。ところが、公害問題
からポリ塩化ビニルの代替品としてポリ塩化ビニルより
はるかに高価であってもポリエチレンテレフタレートを
使用せざるを得なくなった今日においは、ポリエチレン
テレフタレートをヒートシールできる機械を提供するこ
とは今や将に緊急課題なのである。2. Description of the Related Art Items relating to welding are described in detail on pages 765 to 781 of "Handbook of Plastic Processing Technology", published by Nikkan Kogyo Shimbun, December 5, 1969, which is widely used as a resin that can be currently welded. In addition to polyvinyl chloride, polyethylene, and polypropylene that are currently being used, polyester, which is a superordinate concept of polyethylene terephthalate (PET), which is currently considered as a substitute for polyvinyl chloride for pollution-free purposes, is impulse seal and ultrasonic seal. It is described that it can be welded by. The rationale for this description is based on the results obtained in the laboratory by the method shown in FIG. Certainly, as described in this description, even a polyethylene terephthalate can be welded to some extent on a thin one having a wall thickness of 0.1 mm or less and having a rapid heat penetration. However, polyethylene terephthalate with a wall thickness of 0.1 mm or more, particularly 0.2 mm or more,
It was impossible for the welded portion to be completely whitened, that is, to deteriorate, and for the welded portion to be carbonized and substantially welded.
Therefore, it has been attempted to use a hot melt adhesive for bonding thick polyethylene terephthalate, but it is inefficient and costly. However, due to pollution problems, polyethylene terephthalate has to be used even though it is much more expensive than polyvinyl chloride as an alternative to polyvinyl chloride, and nowadays it is not possible to provide a machine that can heat seal polyethylene terephthalate. It is an urgent task for the general.
【0003】[0003]
【目的】本発明の目的は、従来溶着部分が白化したり、
劣化したりして安定な溶着面を形成できなかった肉厚の
ポリエチレンテレフタレートのような合成樹脂ですら、
白化して商品価値を失わないような溶着を可能とする溶
着装置を提供する点にある。[Purpose] The purpose of the present invention is to whiten the conventionally welded portion,
Even a synthetic resin such as thick-walled polyethylene terephthalate that could not form a stable weld surface due to deterioration,
The point is to provide a welding device that enables welding without bleaching and losing commercial value.
【0004】[0004]
【構成】本発明者等は、肉薄のシートならある程度溶着
できるにも拘らず、肉厚になると何故溶着できないかに
ついて鋭意研究を行ってきた。その結果、ポリエチレン
テレフタレートは、その溶着可能温度範囲が極めて狭
く、かつその温度付近で急速に劣化が進行するため、肉
薄の場合には劣化がおこる前にその中心部まで急速加
熱、溶融、急速冷却ができても、肉厚の場合には肉薄の
場合に較べて加熱(浸熱)所要時間がどうしても長くな
る。従来のインパルスによる発熱板の加熱時間は、せい
ぜい0.5秒程度までであり、これ以上の長い時間加熱
を続けることは過熱断線が起り不可能であった。この程
度の短い時間で肉厚物を加熱溶融させるためには、加熱
板の温度を一層高くするしか方法はない。その結果、樹
脂の劣化(炭化)をひきおこすような高温に加熱するこ
とになってしまっていたことが判明した。そこで、本発
明者はインパルス方式といえども、従来のパルス的に電
流を流す時間が0.5秒程度であったものを2〜10秒
程度電流を安定的に流すことができるようにすれば、樹
脂の劣化温度より低い温度で肉厚樹脂フイルムを中央部
までの溶融が可能となり、白化をおこさないで溶着がで
きるのではないかと考えた。そして、本発明者はいろい
ろと試行錯誤を繰返した末、交流電源から電圧を調整し
た後、メッキ装置のような整流回路、平滑路を介して発
熱体を加熱する方法も可能であると考えた。ただ、この
方法だと、構造が複雑で別途の装置が要求されるため
に、本発明の目的とする設置スペックの範囲と、経済的
な要求をみたすことができなかった。そこで、さらに研
究を進めた結果、電圧調整器のつぎにトランスを1つ以
上介在させると、不思議なことに各パルス毎の発熱体の
温度曲線がほとんど同一で、しかも2〜10秒の間一定
温度に保てることを発見し、本発明に至ったものであ
る。すなわち、本発明の第一は、受台上に載置された溶
着用合成樹脂を加熱加圧して溶着するための溶着装置に
おいて、(a)溶着用合成樹脂を所定温度にほぼ瞬時に
加熱するための加熱手段、(b)所定温度に加熱されて
いる溶着用合成樹脂を所定時間のみ加圧する手段、
(c)受台に熱が伝達するのを遮断するための部材を有
する受台および(d)溶着後溶着用合成樹脂を急冷する
ための手段よりなり、かつ前記加熱手段は、交流電源よ
り電圧調整器およびトランスを介してパルス的大電流が
供給された発熱体によるものであることを特徴とする溶
着装置に関する。本発明の第二は、受台上に載置された
溶着用合成樹脂を加熱加圧して溶着するための溶着装置
において、[1](a)溶着用合成樹脂を所定温度にほ
ぼ瞬時に加熱する手段、(b)所定温度に加熱されてい
る溶着用合成樹脂を所定時間のみ加圧する手段、(c)
受台に熱が伝達するのを遮断するための部材を有する受
台よりなる加熱ブロック、[2]受台移動手段、および
[3](d)受台移動手段により移動してきた受台上の
溶着用合成樹脂を急冷するための手段を有する急冷ブロ
ックよりなり、かつ前記加熱手段は、交流電源より電圧
調整器およびトランスを介してパルス的大電流が供給さ
れた発熱体によるものであることを特徴とする溶着装置
に関する。本発明は、前記交流電源より電圧調整器およ
びトランスを介して従来よりも長時間パルス的に大電流
を流すことによってのみ、はじめてポリエチレンテレフ
タレートのような分解しやすく、また結晶化しやすい樹
脂の白化しない溶着を達成することができる。トランス
を介在させることによる作用は必ずしも明確ではない
が、これを介在させることによってのみ、インパルス発
熱体の温度を2〜4秒という従来よりも長い時間一定温
度に正確に制御することができることは驚くべきことで
ある。ここに使用するトランスは普通のトランスでは常
識的に嫌われるヒステリシス損の大きいものが好まし
い。このトランスは、現在普通に市販されているトラン
スの1.3倍以上、好ましくは1.5倍以上のヒステリ
シス損をもつものが好ましい。通常、回路をオンにする
と、オンにした瞬間は目的とする電気エネルギーより大
きなエネルギーが流れる。このことは、一定温度に発熱
体を正確にコントロールする上で好ましいことではな
い。そこで、このような突出現象をトランスのヒステリ
シス損失により吸収させることが好ましい。また、電
圧、電流の制御を極めて正確に行うため、電圧調整器の
出力電圧は、200V程度を中心に調整し、トランスに
より30Vを中心とした電圧に制御できるようにするこ
とが好ましい。この方が電圧調整器により、いきなり3
0V前後に降圧するよりも、電圧のコントロールがはる
かに正確となり、結果として発熱体の温度制御が±2℃
といった変動オーダーで正しく制御できるのである。本
発明装置の機械的作動はすべて空気圧によることが好ま
しい。前記受台移動手段は、ロータリー式であることが
好ましいが、これに限るものではない。急冷手段として
は、発熱体の後方に設置された水冷式急冷手段であるこ
ともできるが、空冷方式、とくにジェット方式の空冷方
式、とりわけ10℃好ましくは5℃またはそれ以下に冷
却した空気をジェット方式でふきつける空冷方式である
ことが好ましい。前記受台に、熱が伝達するのを遮断す
るための部材としては、熱伝導率が0.5W/m・K以
下のものが好ましく、たとえば、テフロン、シリコーン
樹脂、ポリウレタンゴム、フェノール樹脂、これらと紙
の積層体等を挙げることができる。 発熱体と溶着用樹
脂シートの間には、両者の癒着を防ぐためテフロンシー
トやシリコーンシートのような離型シートを介在させて
溶着を実施することが好ましい。[Structure] The inventors of the present invention have conducted earnest research on why a thin sheet can be welded to some extent, but cannot be welded when it is thick. As a result, polyethylene terephthalate has an extremely narrow temperature range where it can be welded, and its deterioration progresses rapidly near that temperature, so when it is thin, it rapidly heats, melts, and rapidly cools to its center before deterioration occurs. Even if it is possible, the time required for heating (immersion) is inevitably long in the case of thick wall as compared with the case of thin wall. The heating time of the heating plate by the conventional impulse is up to about 0.5 seconds at most, and it is impossible to continue the heating for a longer time than this, because an overheat disconnection occurs. The only way to heat and melt a thick product in such a short time is to raise the temperature of the heating plate. As a result, it was revealed that the resin had to be heated to a high temperature that caused deterioration (carbonization) of the resin. Therefore, even if the present inventor uses the impulse method, it is possible to stably flow the current for about 2 to 10 seconds instead of the conventional pulse current for about 0.5 seconds. Therefore, it was thought that the thick resin film could be melted to the central portion at a temperature lower than the deterioration temperature of the resin, and that it could be welded without causing whitening. Then, after repeating trial and error variously, the present inventor thought that a method of heating the heating element through a rectifying circuit such as a plating device or a smoothing path after adjusting the voltage from an AC power source is also possible. .. However, with this method, the structure is complicated and a separate device is required, so that it is not possible to satisfy the range of installation specifications and the economical requirement that are the objectives of the present invention. Therefore, as a result of further research, when one or more transformers are inserted after the voltage regulator, the temperature curves of the heating elements for each pulse are strangely almost the same, and moreover, they are constant for 2 to 10 seconds. The inventors of the present invention discovered that they can be kept at a temperature and arrived at the present invention. That is, the first aspect of the present invention is to (a) heat a synthetic resin for welding to a predetermined temperature almost instantaneously in a welding device for heating and pressing the synthetic resin for welding placed on a cradle. Heating means for (b) a means for pressurizing the synthetic resin for welding heated to a predetermined temperature for a predetermined time,
(C) a pedestal having a member for blocking heat transfer to the pedestal, and (d) means for rapidly cooling the synthetic resin for welding after welding, and the heating means has a voltage from an AC power source. The present invention relates to a welding device characterized by a heating element to which a large pulse current is supplied via a regulator and a transformer. A second aspect of the present invention is, in a welding device for heating and pressing a synthetic resin for welding placed on a pedestal, to heat the synthetic resin for welding [1] (a) to a predetermined temperature almost instantly. Means (b) means for pressurizing the welding synthetic resin heated to a predetermined temperature for a predetermined time, (c)
On the pedestal moved by the heating block including the pedestal having a member for blocking heat transfer to the pedestal, [2] pedestal moving means, and [3] (d) pedestal moving means It comprises a quenching block having means for quenching the synthetic resin for welding, and the heating means is a heating element to which a large pulse current is supplied from an AC power source through a voltage regulator and a transformer. The present invention relates to a characteristic welding device. The present invention does not whiten a resin which is easy to decompose and crystallizes easily like polyethylene terephthalate only when a large current is pulsed from the AC power source for a longer time than a conventional one through a voltage regulator and a transformer. Welding can be achieved. Although the effect of interposing a transformer is not clear, it is surprising that the temperature of the impulse heating element can be accurately controlled to a constant temperature of 2 to 4 seconds longer than before by only interposing the transformer. It should be. It is preferable that the transformer used here has a large hysteresis loss, which is generally disliked by ordinary transformers. It is preferable that this transformer has a hysteresis loss of 1.3 times or more, and preferably 1.5 times or more of that of a transformer currently commercially available. Normally, when the circuit is turned on, at the moment when the circuit is turned on, energy larger than the target electric energy flows. This is not preferable for accurately controlling the heating element at a constant temperature. Therefore, it is preferable to absorb such a protrusion phenomenon by the hysteresis loss of the transformer. Further, in order to control the voltage and the current very accurately, it is preferable that the output voltage of the voltage regulator is adjusted around 200V so that the voltage can be controlled around 30V by the transformer. This is suddenly 3 by the voltage regulator
The voltage control becomes much more accurate than the step-down to around 0V, and as a result, the temperature control of the heating element is ± 2 ° C.
It is possible to control correctly in such a variable order. Preferably, all mechanical actuation of the device of the invention is pneumatic. The cradle moving means is preferably a rotary type, but is not limited to this. The quenching means may be a water-cooling type quenching means installed behind the heating element, but an air-cooling method, particularly a jet-type air-cooling method, and particularly air cooled to 10 ° C., preferably 5 ° C. or lower, is jetted. It is preferable to use an air-cooling method that wipes with a method. As a member for blocking heat transfer to the pedestal, one having a thermal conductivity of 0.5 W / mK or less is preferable, and examples thereof include Teflon, silicone resin, polyurethane rubber, phenol resin, and the like. And a paper laminate. It is preferable to perform welding by interposing a release sheet such as a Teflon sheet or a silicone sheet between the heating element and the resin sheet for welding in order to prevent adhesion between the two.
【0005】前記加熱手段により、出力のばらつきがな
くなり、エネルギーを安定して供給できるようになった
ため、センサーやタイマーとの共調により、加熱部の温
度を極めて正確に一定温度に制御できるようになり、過
熱が発生せず、溶着部分に白化や劣化が生ずることがな
い。このように2〜10秒という溶着期間中正確に一定
温度に発熱体を保持することは本発明の加熱手段によっ
てのみ達成することができる。前記電圧調整器いわゆる
スライダックスは電熱線を所定の温度にセットするため
に欠かすことができないものである。本発明において
は、必要個所の温度を正確に測定する温度センサ、処理
時間を正確に指示するタイマーを使用するとともに、セ
ンサ、タイマーの指示により電磁弁を開閉させ、それに
よりエアーコンプレッサの開閉を行う。これによるエア
ーコンプレッサの作動時間は、油圧機構による場合のほ
ぼ1/3で済み、時間のずれが極めて少ないので、溶着
部分の合成樹脂が分解、劣化の危険にさらされる時間を
きわめて少なくすることが可能となる。溶着のさいの温
度はシートが肉厚の場合には特に厳密に管理することが
好ましい。溶着される樹脂がポリエチレンテレフタレー
トの場合には融解再結晶化温度±5℃、好ましくは±2
℃の温度範囲にセットすることがとくに好ましい。これ
以外の樹脂においても前記温度範囲で溶着を行えば優れ
た溶着結果を得ることができる。本発明は、ポリエチレ
ンテレフタレートを中心に説明したが、溶着される樹脂
としては、従来溶着可能とされているものは、いずれも
適用可能である。Since the heating means eliminates the variation in the output and enables the stable supply of energy, the temperature of the heating portion can be controlled extremely accurately to a constant temperature in coordination with the sensor and the timer. As a result, overheating does not occur, and the welded part does not whiten or deteriorate. Thus, maintaining the heating element at a constant temperature accurately during the welding period of 2 to 10 seconds can be achieved only by the heating means of the present invention. The voltage regulator, so-called sliderox, is indispensable for setting the heating wire at a predetermined temperature. In the present invention, a temperature sensor that accurately measures the temperature of the required location and a timer that accurately indicates the processing time are used, and the solenoid valve is opened and closed according to the instructions of the sensor and the timer, thereby opening and closing the air compressor. .. As a result, the operating time of the air compressor is almost one-third that of the hydraulic mechanism, and the time difference is extremely small, so the time when the synthetic resin in the welded part is exposed to the risk of decomposition and deterioration can be greatly reduced. It will be possible. It is preferable that the temperature during welding is strictly controlled particularly when the sheet is thick. When the resin to be deposited is polyethylene terephthalate, the melting recrystallization temperature is ± 5 ° C, preferably ± 2.
It is particularly preferable to set in the temperature range of ° C. Excellent welding results can be obtained even with resins other than these by performing welding within the above temperature range. Although the present invention has been described focusing on polyethylene terephthalate, any resin that can be conventionally welded can be applied as the resin to be welded.
【0006】[0006]
実施例1 発熱体を加熱するための手段としては、図1に示す回路
を使用した。MCは回路を開閉するための電磁弁であ
る。図2および図3は本発明におけるこの実施例で使用
した溶着装置であって、図2は正面断面図、図3は側面
断面図である。発熱体1は前記回路に接続され、この回
路を用いてパルス的に大電流を流すことにより加熱す
る。回路に電流を流すためには0.3mm厚ポリエチレ
ンテレフタレートのシート5と6を加圧した時、電磁弁
(図中、M.C.で表示)が作動するようにセットして
ある。かくして、加圧と同時に大電流がパルス的に流れ
て発熱体を瞬時に180℃(この樹脂の融解再結晶化温
度である185℃より5℃低い温度にセットしてある)
に加熱する。また、加圧を解除すると同時に回路はオフ
になる。同時にジェット空冷式の冷却器2より5℃程度
に冷却した空気を溶着個所に吹き付けることにより可及
的速やかに樹脂シートを冷却する。溶着後、速やかに溶
着されたシートを冷却できるよう受台3の上には加熱時
の熱ができるだけ受台に伝わらないような断熱シート4
を設けることが必要である。この実施例においてはテフ
ロンを使用したがテフロンのかわりにシリコーンを使用
することもできる。実施例に使用したポリエチレンテレ
フタレート(A−PET ミネロン社商品名)、融点2
58℃、融解再結晶化温度(DSC法)185℃、厚さ
0.4mmのものであり、これを3mm幅で、長さ28
0mmにわたって溶着した。溶着は、前記回路を用いて
パルス的に大電流を発熱体に供給し、発熱体の温度を1
85℃の一定に保ち、4kg/560mm2の加圧下、
2.5秒間加熱加圧してPETを溶着した。受台はその
表面にテフロンシートを敷くことにより断熱した結果、
加熱加圧時の温度は20℃に保たれていた。2.5秒経
過後、プレス盤をあげると同時に冷却器2より5℃の冷
却ジェットエアーを2.5秒間吹きつけて溶着個所を冷
却した。溶着個所を検査したが、白化は全くおこってお
らず、他の個所と同様透明であった。溶着部分を20k
gの引張力で引張ったが全く変化はなかった。また、溶
着個所に10kgの衝撃を加えても全く異常は発生しな
かった。Example 1 The circuit shown in FIG. 1 was used as a means for heating the heating element. MC is a solenoid valve for opening and closing the circuit. 2 and 3 show a welding apparatus used in this embodiment of the present invention, wherein FIG. 2 is a front sectional view and FIG. 3 is a side sectional view. The heating element 1 is connected to the above circuit, and is heated by passing a large current in a pulsed manner using this circuit. In order to apply a current to the circuit, the solenoid valve (indicated by MC in the figure) is set to operate when the sheets 5 and 6 of 0.3 mm thick polyethylene terephthalate are pressurized. Thus, at the same time as the pressurization, a large current flows in a pulsed manner, and the heating element is instantaneously heated to 180 ° C (set at a temperature 5 ° C lower than 185 ° C, which is the melting and recrystallization temperature of this resin).
Heat to. Also, the circuit is turned off at the same time when the pressure is released. At the same time, the resin sheet is cooled as quickly as possible by blowing air cooled to about 5 ° C. from the jet air-cooling type cooler 2 to the welding point. After the welding, the heat-insulating sheet 4 is provided on the pedestal 3 so that the heat at the time of heating is not transmitted to the pedestal as much as possible so that the fused sheet can be cooled promptly.
It is necessary to provide. Although Teflon was used in this embodiment, silicone can be used instead of Teflon. Polyethylene terephthalate (A-PET Mineron trade name) used in Examples, melting point 2
58 ° C., melting recrystallization temperature (DSC method) 185 ° C., thickness 0.4 mm, 3 mm width, length 28 mm
Welded over 0 mm. For the welding, a large current is supplied to the heating element in a pulsed manner by using the above circuit, and the temperature of the heating element is set to 1
Maintaining a constant temperature of 85 ° C., under a pressure of 4 kg / 560 mm 2 ,
PET was welded by applying heat and pressure for 2.5 seconds. As a result of insulating the pedestal by laying a Teflon sheet on its surface,
The temperature during heating and pressing was kept at 20 ° C. After 2.5 seconds, the press plate was lifted and at the same time, cooling jet air of 5 ° C. was blown from the cooler 2 for 2.5 seconds to cool the welded portion. The welded part was inspected, but no whitening occurred, and it was transparent like other parts. 20k welding part
It was pulled with a pulling force of g, but there was no change at all. Moreover, no abnormality occurred at all even if a 10 kg impact was applied to the welded portion.
【0007】[0007]
【効果】本発明により今まで不可能であった肉厚のポリ
エチレンテレフタレートフイルム、すなわちシートの溶
着が実質的に可能となった。[Effect] The present invention has made it possible to substantially weld a thick polyethylene terephthalate film, that is, a sheet, which has been impossible so far.
【図1】本発明における実施例の発熱体を通電加熱する
ための回路図である。FIG. 1 is a circuit diagram for electrically heating a heating element according to an embodiment of the present invention.
【図2】実施例の溶着装置の正面断面図である。FIG. 2 is a front sectional view of a welding device according to an embodiment.
【図3】実施例の溶着装置の側面断面図である。FIG. 3 is a side sectional view of the welding apparatus of the embodiment.
1 発熱体 2 冷却器 3 受台 4 断熱材 5 ポリエチレンテレフタレートシート 6 ポリエチレンテレフタレートシート 1 heating element 2 cooler 3 pedestal 4 heat insulating material 5 polyethylene terephthalate sheet 6 polyethylene terephthalate sheet
Claims (6)
熱加圧して溶着するための溶着装置において、(a)溶
着用合成樹脂を所定温度にほぼ瞬時に加熱するための加
熱手段、(b)所定温度に加熱されている溶着用合成樹
脂を所定時間のみ加圧する手段、(c)受台に熱が伝達
するのを遮断するための部材を有する受台および(d)
溶着後溶着用合成樹脂を急冷するための手段よりなり、
かつ前記加熱手段は、交流電源より電圧調整器およびト
ランスを介してパルス的大電流が供給された発熱体によ
るものであることを特徴とする溶着装置。1. A welding device for heating and pressing a synthetic resin for welding placed on a pedestal to weld the synthetic resin for welding (a) to a predetermined temperature almost instantly. (B) means for pressurizing the synthetic resin for welding heated to a predetermined temperature for a predetermined time only, (c) a pedestal having a member for blocking heat transfer to the pedestal, and (d)
It consists of means for rapidly cooling the synthetic resin for welding after welding,
The heating means is a heating element supplied with a large pulse current from an AC power source via a voltage regulator and a transformer.
熱加圧して溶着するための溶着装置において、[1]
(a)溶着用合成樹脂を所定温度にほぼ瞬時に加熱する
手段、(b)所定温度に加熱されている溶着用合成樹脂
を所定時間のみ加圧する手段、(c)受台に熱が伝達す
るのを遮断するための部材を有する受台よりなる加熱ブ
ロック、[2]受台移動手段、および[3](d)受台
移動手段により移動してきた受台上の溶着用合成樹脂を
急冷するための手段を有する急冷ブロックよりなり、か
つ前記加熱手段は、交流電源より電圧調整器およびトラ
ンスを介してパルス的大電流が供給された発熱体による
ものであることを特徴とする溶着装置。2. A welding apparatus for heating and pressing a synthetic resin for welding placed on a cradle to weld the same, [1]
(A) A means for heating the synthetic resin for welding to a predetermined temperature almost instantly, (b) A means for pressurizing the synthetic resin for welding for a predetermined time only at a predetermined temperature, and (c) Heat is transferred to a pedestal. The heating block including a pedestal having a member for shutting off the heat, [2] the pedestal moving means, and [3] (d) the synthetic resin for welding on the pedestal moved by the pedestal moving means is rapidly cooled. And a heating block to which the heating means is supplied with a large pulse current from an AC power source through a voltage regulator and a transformer.
圧によるものである請求項1または2記載の溶着装置。3. The welding device according to claim 1, wherein all the mechanical operations of these means are pneumatic.
求項2記載の溶着装置。4. The welding device according to claim 2, wherein the cradle moving means is a rotary type.
項1または2記載の溶着装置。5. The welding device according to claim 1, wherein the quenching means is a water-cooling type quenching means.
たは2記載の溶着装置。6. The welding device according to claim 1, wherein the rapid cooling means is an air cooling system.
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3433692A JPH05200872A (en) | 1992-01-24 | 1992-01-24 | Welding device |
CN92108984A CN1074648A (en) | 1992-01-24 | 1992-07-29 | Deposition apparatus |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP3433692A JPH05200872A (en) | 1992-01-24 | 1992-01-24 | Welding device |
Publications (1)
Publication Number | Publication Date |
---|---|
JPH05200872A true JPH05200872A (en) | 1993-08-10 |
Family
ID=12411304
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP3433692A Pending JPH05200872A (en) | 1992-01-24 | 1992-01-24 | Welding device |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPH05200872A (en) |
CN (1) | CN1074648A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020128102A (en) * | 2016-07-01 | 2020-08-27 | エステー産業株式会社 | Sheet welding device |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108822749B (en) * | 2018-08-20 | 2023-10-20 | 江苏省特种设备安全监督检验研究院 | Epoxy heating and pressurizing device |
-
1992
- 1992-01-24 JP JP3433692A patent/JPH05200872A/en active Pending
- 1992-07-29 CN CN92108984A patent/CN1074648A/en active Pending
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2020128102A (en) * | 2016-07-01 | 2020-08-27 | エステー産業株式会社 | Sheet welding device |
Also Published As
Publication number | Publication date |
---|---|
CN1074648A (en) | 1993-07-28 |
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