JPH0586908B2 - - Google Patents
Info
- Publication number
- JPH0586908B2 JPH0586908B2 JP63245367A JP24536788A JPH0586908B2 JP H0586908 B2 JPH0586908 B2 JP H0586908B2 JP 63245367 A JP63245367 A JP 63245367A JP 24536788 A JP24536788 A JP 24536788A JP H0586908 B2 JPH0586908 B2 JP H0586908B2
- Authority
- JP
- Japan
- Prior art keywords
- welding
- welded
- hot air
- air outlet
- rod
- 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
Links
- 238000003466 welding Methods 0.000 claims description 135
- 238000010438 heat treatment Methods 0.000 claims description 25
- 238000002844 melting Methods 0.000 claims description 25
- 230000008018 melting Effects 0.000 claims description 25
- 238000004023 plastic welding Methods 0.000 claims description 16
- 238000000034 method Methods 0.000 claims description 15
- 239000004033 plastic Substances 0.000 claims description 8
- 229920003023 plastic Polymers 0.000 claims description 8
- 238000007664 blowing Methods 0.000 description 11
- 238000002425 crystallisation Methods 0.000 description 6
- 230000008025 crystallization Effects 0.000 description 6
- 239000000463 material Substances 0.000 description 6
- 229920001343 polytetrafluoroethylene Polymers 0.000 description 6
- 239000004810 polytetrafluoroethylene Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 2
- -1 perfluoroalkyl vinyl ether Chemical compound 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 229920001577 copolymer Polymers 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 230000006866 deterioration Effects 0.000 description 1
- NBVXSUQYWXRMNV-UHFFFAOYSA-N fluoromethane Chemical compound FC NBVXSUQYWXRMNV-UHFFFAOYSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- BFKJFAAPBSQJPD-UHFFFAOYSA-N tetrafluoroethene Chemical group FC(F)=C(F)F BFKJFAAPBSQJPD-UHFFFAOYSA-N 0.000 description 1
- 238000005979 thermal decomposition reaction Methods 0.000 description 1
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
- B29C65/10—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined
- B29C65/12—Joining or sealing of preformed parts, e.g. welding of plastics materials; Apparatus therefor by heating, with or without pressure using hot gases (e.g. combustion gases) or flames coming in contact with at least one of the parts to be joined and welding bar
-
- 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
- B29C66/712—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 the composition of one of the parts to be joined being different from the composition of the other part
-
- 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
- B29C66/83—General aspects of machine operations or constructions and parts thereof characterised by the movement of the joining or pressing tools
- B29C66/836—Moving relative to and tangentially to the parts to be joined, e.g. transversely to the displacement of the parts to be joined, e.g. using a X-Y table
- B29C66/8362—Rollers, cylinders or drums moving relative to and tangentially to 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
- B29C66/02—Preparation of the material, in the area to be joined, prior to joining or welding
- B29C66/024—Thermal pre-treatments
- B29C66/0242—Heating, or preheating, e.g. drying
-
- 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
- B29C66/73—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/739—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset
- B29C66/7392—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic
- B29C66/73921—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 intensive physical properties of the material of the parts to be joined, by the optical properties of the material of the parts to be joined, by the extensive physical properties of the parts to be joined, by the state of the material of the parts to be joined or by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of the parts to be joined being a thermoplastic or a thermoset characterised by the material of at least one of the parts being a thermoplastic characterised by the materials of both parts being thermoplastics
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
発明の技術分野
本発明は、プラスチツクの溶接方法および溶接
装置に関し、さらに詳しくは、溶接強度の低下の
ない、安定した溶接強度を得ることができるよう
なプラスチツクの溶接方法および溶接装置に関す
る。TECHNICAL FIELD OF THE INVENTION The present invention relates to a plastic welding method and a welding device, and more particularly to a plastic welding method that can obtain stable welding strength without decreasing welding strength. and regarding welding equipment.
発明の技術的背景ならびにその問題点
プラスチツクの溶接方法には、熱風溶接法、熱
板溶接法、高周波溶接法、摩擦溶接法など様々な
溶接方法があるが、一般には、溶接ガン（溶接装
置）から熱風を送り出し、溶接棒、被溶接部材の
被溶接部を加熱溶融させて溶接する熱風溶接法が
最も多くも用いられている。Technical background of the invention and its problems There are various welding methods for plastics, such as hot air welding, hot plate welding, high frequency welding, and friction welding, but in general, welding guns (welding equipment) are used. The most commonly used method is hot air welding, in which hot air is sent out from the welding rod to heat and melt the welding rod and the welded part of the welded member.
かかる熱風溶接法は、自動機で行なう場合と作
業員が手動で行なう場合とがあり、従来は、一般
に第３図に示すような溶接装置を使用していた。
この従来例における溶接装置２０は、溶接棒７を
供給保持する溶接棒ホルダー２１と、熱風吹出口
２２を１個有する一風式ノズル２３とを有する構
成であり、熱風吹出口２２から吹出された熱風を
被溶接部材９の被溶接部１０と溶接棒７の繰出部
に同時に当てて両者を加熱溶融させ、前記溶接装
置２０を右方に移動しながら、第４図に示すよう
に、溶融した溶接棒７ａを被溶接部１０に流し込
み、固化させることによつて溶接を行なつてい
た。なお、第３図中、「24」は溶接棒７のガイド
ローラ２４である。 This hot air welding method may be performed using an automatic machine or manually by a worker, and conventionally, a welding device as shown in FIG. 3 has generally been used.
The welding device 20 in this conventional example has a welding rod holder 21 that supplies and holds a welding rod 7, and a single-air nozzle 23 having one hot air outlet 22. Hot air is applied to the welded part 10 of the welded member 9 and the feeding part of the welding rod 7 at the same time to heat and melt them, and while moving the welding device 20 to the right, as shown in FIG. Welding was performed by pouring the welding rod 7a into the welded part 10 and solidifying it. In addition, in FIG. 3, "24" is the guide roller 24 of the welding rod 7.
しかしながら、上記従来例においては、溶接棒
と被溶接部材の被溶接部を同時に加熱溶融して溶
接する方法および装置なので、溶接棒と被溶接部
材が融点の異なる異種プラスチツク材の場合、特
に溶接棒がテトラフルオロエチレンとパーフルオ
ロアルキルビニルエーテルとの共重合体
（PFA）、被溶接部材がポリテトラフルオロエチ
レン（PTFE）の溶接においては、20℃以上も融
点が異なるため、上述のようなノズルでは、融点
の低いPFAの熱分解などの過剰溶融や逆に融点
の高いPTFEの溶融不足などによつて、熟練作業
員でも溶接強度の低下やばらつきを生じるという
問題点がある。また、溶接棒と被溶接部材が融点
の同じ同種のプラスチツク材の場合でも、溶接装
置の移動スピードが遅延気味のときは溶接棒が溶
け過ぎてしまい、溶接時の押圧が不充分となり、
溶接が充分になされない虞がある。 However, in the above conventional example, since the welding rod and the welding part of the welded part are simultaneously heated and melted, the welding rod and the welded part are welded by simultaneously heating and melting. When welding a copolymer of tetrafluoroethylene and perfluoroalkyl vinyl ether (PFA) and polytetrafluoroethylene (PTFE), the melting points differ by more than 20°C, so the nozzle described above Excessive melting due to thermal decomposition of PFA, which has a low melting point, and insufficient melting of PTFE, which has a high melting point, can cause problems such as reductions in welding strength and variations even for experienced workers. In addition, even if the welding rod and the workpiece are made of the same type of plastic material with the same melting point, if the welding device's movement speed is slow, the welding rod will melt too much and the pressure during welding will not be sufficient.
There is a risk that welding may not be done sufficiently.
本発明者らは、安定した溶接強度が得られるプ
ラスチツクの溶接方法および溶接装置を得るべく
鋭意研究した結果、被溶接部材を結晶化直前の温
度に保持しつつ溶接棒を溶融させて溶接すると安
定した溶接強度が得られるという知見を得て、本
発明を完成するに至つた。 As a result of intensive research to obtain a plastic welding method and welding device that can provide stable welding strength, the inventors of the present invention found that welding is stable when the welding rod is melted while the welding part is held at a temperature just before crystallization. The present invention was completed based on the knowledge that a high welding strength can be obtained.
発明の目的
本発明は、このような実情に鑑みてなされたも
のであつて、たとえ溶接棒と被溶接部材が融点の
異なる異種プラスチツク材であつても、溶接強度
の低下やばらつきのない、安定した溶接強度が得
られるような溶接方法および溶接装置を提供する
ことを目的とする。Purpose of the Invention The present invention has been made in view of the above circumstances, and provides stable welding without deterioration or variation in welding strength, even if the welding rod and the workpiece are made of different plastic materials with different melting points. It is an object of the present invention to provide a welding method and a welding device that can obtain a high welding strength.
発明の概要
本発明に係るプラスチツクの溶接方法は、溶接
棒を被溶接部材の被溶接部に当て、この被溶接部
を溶接装置から吹出される熱風によつて加熱溶融
して溶接するプラスチツクの溶接方法において、
第１の加熱手段により前記被溶接部材の被溶接部
を実質的に溶融状態とした後、さらに第２の加熱
手段により溶融した被溶接部を被溶接部材の融点
以下に下がらない温度に保持すると同時に前記溶
接棒を加熱溶融し、かかる状態の該被溶接部材の
被溶接部を前記溶接棒で溶接することを特徴とし
ている。Summary of the Invention The plastic welding method according to the present invention involves applying a welding rod to a welded part of a member to be welded, and heating and melting the welded part with hot air blown from a welding device. In the method,
After the welded part of the welded member is brought into a substantially molten state by the first heating means, the melted welded part is further maintained at a temperature that does not drop below the melting point of the welded member by the second heating means. At the same time, the welding rod is heated and melted, and the welded part of the welded member in this state is welded with the welding rod.
また、本発明に係るプラスツクの溶接装置は、
プラスチツクの溶接時に溶接棒を供給保持する溶
接棒ホルダーと、該溶接棒と被溶接部材の被溶接
部とを加熱溶融させる熱風吹出口を有するノズル
とを有するプラスチツクの溶接装置において、前
記ノズルの熱風吹出口が第１の熱風吹出口と第２
の熱風吹出口とから成り、第２の熱風吹出口が溶
接棒と被溶接部との当接部方向に向けて開口して
おり、第１の熱風吹出口が前記当接部よりも溶接
装置の進行方向前方の被溶接部に向けて開口して
いることを特徴としている。 Furthermore, the plastic welding device according to the present invention includes:
A plastic welding device comprising a welding rod holder for supplying and holding a welding rod during plastic welding, and a nozzle having a hot air outlet for heating and melting the welding rod and a welded part of a welded member. The wind outlet is the first hot air outlet and the second hot air outlet.
The second hot air outlet opens toward the contact area between the welding rod and the part to be welded, and the first hot air outlet opens toward the welding device further than the contact area. It is characterized by opening toward the part to be welded forward in the direction of movement.
前記第１の熱風吹出口の吹出口角度は、被溶接
部の平面に対して35〜75度、前記第２の熱風吹出
口の吹出口角度が35〜65度であるのが好ましい。 It is preferable that the first hot air outlet has an outlet angle of 35 to 75 degrees with respect to the plane of the welded part, and the second hot air outlet has an outlet angle of 35 to 65 degrees.
発明の具体的説明
以下、本発明に係るプラスチツクの溶接方法お
よび溶接装置について、第１図および第２図に基
づいて説明する。DETAILED DESCRIPTION OF THE INVENTION The plastic welding method and welding apparatus according to the present invention will be described below with reference to FIGS. 1 and 2.
第１図は本発明に係る溶接装置の要部側面図
で、溶接装置１は二風式ノズル２と、該二風式ノ
ズル２の後部に溶接棒ホルダー６を有する。 FIG. 1 is a side view of a main part of a welding apparatus according to the present invention, and the welding apparatus 1 has a two-air nozzle 2 and a welding rod holder 6 at the rear of the two-air nozzle 2.
溶接棒ホルダー６は、溶接棒７を順次供給して
送り出すために溶接棒７を保持する役目を果たす
ものである。後述する二風式ノズル２によつて加
熱溶融された溶接棒７は、該溶接棒ホルダー６に
設けられたローラ８によつて被溶接部材９の被溶
接部１０に押圧され、ガイドされるようになつて
いる。 The welding rod holder 6 serves to hold the welding rods 7 in order to sequentially supply and send out the welding rods 7. A welding rod 7 heated and melted by a two-air nozzle 2 to be described later is pressed against a welded part 10 of a welded member 9 by a roller 8 provided on the welding rod holder 6 and guided. It's getting old.
二風式ノズル２は、第１の熱風吹出口（第１の
加熱手段）３と、溶接装置１の進行方向Ａに対し
て後方に位置する第２の熱風吹出口（第２の加熱
手段）４とに二分岐されている。 The two-air nozzle 2 includes a first hot air outlet (first heating means) 3 and a second hot air outlet (second heating means) located at the rear with respect to the traveling direction A of the welding device 1. It is bifurcated into 4.
第１の熱風吹出し口３は、被溶接部材９の被溶
接部１０をまず最初に加熱して溶融させるための
熱風吹出口で、その吹出角度〓1（第２図）は、特
に限定はされないが、熱効率等の点から、被溶接
部１０の水平面に対して35〜75度、好ましくは55
度近傍になるように設定するのが好ましい。 The first hot air outlet 3 is a hot air outlet for first heating and melting the welded part 10 of the welded member 9, and its blowing angle 〓 1 (Fig. 2) is not particularly limited. However, from the viewpoint of thermal efficiency, etc., the angle is 35 to 75 degrees, preferably 55 degrees with respect to the horizontal plane of the part to be welded 10.
It is preferable to set it so that it is close to 100 degrees.
第２の熱風吹出し口４は、前記第１の熱風吹出
口３からの熱風によつて加熱溶融された被溶接部
１０の後加熱のためのものである。すなわち、上
記加熱溶融後、溶接装置１は矢印Ａ方向へ移動す
るため、前記被溶接部１０の熱風の吹付けがなく
なり冷却される。第２の熱風吹出口３は、この冷
却部分に後加熱として第２の熱風吹出口４から熱
風を吹付け、被溶接部１０をその融点以下に下が
らないような温度に保つ役目をする。好ましく
は、結晶化直前の温度を保つのが良い。これによ
り被溶接部１０は、最も溶接安定性のよい温度に
保持される状態になる。この第２の熱風吹出口４
からの熱風は、上述の被溶接部１０の後加熱と同
時に、溶接棒ホルダー６から供給保持される溶接
部７の繰出部分を溶融加熱する役目も果たすよう
になつている。従つて、この第２の熱風吹出し口
４の吹出角度〓2は、前記吹出角度〓1よりも小さ
く設定されるが、作業効率等の点から、被溶接部
１０の水平面に対して、35〜65度、好ましくは
40゜近傍になるように設定されるのが好ましい。 The second hot air outlet 4 is for post-heating the part 10 to be welded which has been heated and melted by the hot air from the first hot air outlet 3. That is, after the heating and melting, the welding device 1 moves in the direction of the arrow A, so that the welded part 10 is no longer blown with hot air and is cooled. The second hot air outlet 3 blows hot air from the second hot air outlet 4 to the cooled portion as post-heating, and serves to maintain the temperature of the part to be welded 10 so as not to drop below its melting point. Preferably, the temperature is maintained just before crystallization. As a result, the part to be welded 10 is maintained at a temperature that provides the best welding stability. This second hot air outlet 4
The hot air from the welding rod holder 6 serves to melt and heat the extended portion of the welding portion 7 that is supplied and held from the welding rod holder 6 at the same time as post-heating the welded portion 10 described above. Therefore, the blowing angle 〓 2 of the second hot air blowing port 4 is set smaller than the blowing angle 〓 1 , but from the viewpoint of work efficiency, etc., the blowing angle 〓 2 is set to be smaller than the blowing angle 〓 1. 65 degrees, preferably
It is preferable to set the angle to be around 40°.
なお、第１の熱風吹出口３の開口端３ａは、第
２の熱風吹出口４の開口端４ａより所定寸法l1だ
け上方に位置することが好ましく、第１の熱風吹
出口３からの熱風が被溶接部１０のみを吹付ける
ようにすればよい。この所定寸法l1は特に限定さ
れないが、２〜10mm、好ましくは３mm内外が好ま
しい。 Note that the opening end 3a of the first hot air outlet 3 is preferably located above the opening end 4a of the second hot air outlet 4 by a predetermined distance l1, and the hot air from the first hot air outlet 3 is preferably located above the opening end 4a of the second hot air outlet 4. It is sufficient to spray only the part 10 to be welded. This predetermined dimension l1 is not particularly limited, but is preferably 2 to 10 mm, preferably around 3 mm.
次にかかる溶接装置を用いた場合のプラスチツ
ク溶接方法について説明する。 Next, a plastic welding method using such a welding device will be explained.
溶接装置１を、前記第２の熱風吹出口４の開口
端４ａが被溶接部材９の被溶接部１０から所長間
隔、たとえば５mm上方になるような位置にセツト
する。そして、二風式ノズル２から高温の熱風を
送り込み、同時に溶接棒７を連続供給しながら、
溶接装置１全体を溶接方向（第１図中矢印Ａ方
向）へ所定速度で移動させる。 The welding apparatus 1 is set at a position such that the open end 4a of the second hot air outlet 4 is above the welded portion 10 of the welded member 9 by a predetermined distance, for example, 5 mm. Then, while sending high-temperature hot air from the two-air nozzle 2 and continuously supplying the welding rod 7,
The entire welding apparatus 1 is moved at a predetermined speed in the welding direction (direction of arrow A in FIG. 1).
第１の熱風吹出口（第１の加熱手段）３からの
熱風は、被溶接部１０に吹付けられ、当該部を加
熱溶融し、実質的に溶融状態にする。ここで吹付
角度〓1を所定角度に設定することにより、熱風
吹付けは被溶接部１０のみを効率よく行なうこと
ができる。 The hot air from the first hot air outlet (first heating means) 3 is blown onto the part to be welded 10, heating and melting the part to substantially bring it into a molten state. By setting the blowing angle 〓 1 to a predetermined angle, hot air blowing can be efficiently performed only on the part to be welded 10 .
加熱装置１は矢印Ａ方向に移動するため、この
溶融部分は第１の熱風吹出口３からの熱風吹付け
が終了し、雰囲気温下で冷却され、結晶化しよう
とする。さらに加熱装置１の移動が続き、この冷
却部に今度は第２の熱風吹出口（第２の加熱手
段）４によつて熱風吹付けがされることにより、
被溶接部１０が融点近傍の温度、好ましくは結晶
化直前の温度に保持される。結晶化直前の温度は
最も安定した溶接強度が得られる温度である。第
２の熱風吹出口４の吹出角度〓2を所定角度に設
定することにより、この時同時に、溶接棒７の繰
出部（溶接棒７と被溶接部１０との当接部１１）
にも熱風が吹付けられ、溶接棒７が溶融される。 Since the heating device 1 moves in the direction of arrow A, the hot air blowing from the first hot air outlet 3 ends on this molten portion, and the melted portion is cooled at the ambient temperature and attempts to crystallize. Further, the movement of the heating device 1 continues, and hot air is then blown onto this cooling section by the second hot air outlet (second heating means) 4.
The welded part 10 is maintained at a temperature near its melting point, preferably at a temperature just before crystallization. The temperature immediately before crystallization is the temperature at which the most stable welding strength is obtained. By setting the blowing angle 〓 2 of the second hot air blowing outlet 4 to a predetermined angle, at the same time, the feeding part of the welding rod 7 (the contact part 11 between the welding rod 7 and the part to be welded 10)
Hot air is also blown to melt the welding rod 7.
そして、溶融された溶接棒７ａはローラ８によ
つて押圧ガイドされ、前記被溶接部材９の被溶接
部１０に送り込まれ、被溶接部材９相互を溶接す
るが、被溶接部１０は結晶化直前の温度に保持さ
れているため、溶接強度の低下やばらつきのな
い、安定した溶接がなされる。 Then, the molten welding rod 7a is pressed and guided by rollers 8 and is fed into the welded part 10 of the welded parts 9 to weld the welded parts 9 to each other, but the welded part 10 is just before crystallization. Since the welding temperature is maintained at , stable welding is achieved without any decrease or variation in welding strength.
したがつて溶接棒７の溶融温度と被溶接材９の
溶接温度がたとえ異なるとしても、融点の低い溶
接棒を熱分解させることなく、また融点の高い被
溶接部材を溶融不足の状態とすることもなく、溶
接強度の安定したプラスチツクの溶接をすること
ができる。 Therefore, even if the melting temperature of the welding rod 7 and the welding temperature of the material to be welded 9 are different, the welding rod with a low melting point will not be thermally decomposed, and the material to be welded with a high melting point will be in a state of insufficient melting. It is possible to weld plastics with stable welding strength.
本発明によれば、特に溶接が困難とされている
PTFE板相互を、PFAから成る溶接棒を用いて
良好に溶接することができる。 According to the present invention, welding is particularly difficult.
PTFE plates can be successfully welded together using a welding rod made of PFA.
なお、本発明で溶接される被溶接部材として
は、PFAやPTFEのようなフツ素樹脂に限らず、
その他のプラスチツクも可能である。 Note that the welded parts to be welded in the present invention are not limited to fluorocarbon resins such as PFA and PTFE.
Other plastics are also possible.
発明の効果
以上詳述したように本発明によれば、溶接棒を
被溶接部材の被溶接部に当て、この被溶接部を溶
接装置から吹出される熱風によつて加熱溶融して
溶接するプラスチツクの溶接方法において、第１
の加熱手段により前記被溶接部材の被溶接部を実
質的に溶融状態とした後、さらに第２の加熱手段
により溶融した被溶接部をその融点近傍、好まし
くは結晶化直前の温度に保持すると同時に前記溶
接棒を加熱溶融し、かかる状態の該被溶接部材の
被溶接部を該溶接棒で溶接することを特徴とする
本発明の方法およびそれに用いる溶接装置によれ
ば、プラスチツクの溶接において、溶接棒、被溶
接部材がたとえ融点の異なる異種プラスチツク材
であつても、溶接強度の低下やばらつきのない、
安定した溶接強度が得られるプラスチツクの溶接
が可能になるという優れた効果を有する。Effects of the Invention As detailed above, according to the present invention, a welding rod is applied to a welded part of a member to be welded, and the welded part is heated and melted by hot air blown from a welding device. In the welding method of
After the welded portion of the welded member is brought into a substantially molten state by the heating means, the melted welded portion is further maintained at a temperature near its melting point, preferably just before crystallization, by a second heating means, and at the same time. According to the method of the present invention and the welding apparatus used therein, the welding rod is heated and melted, and the welding part of the welded member in such a state is welded with the welding rod. Even if the rods and parts to be welded are different plastic materials with different melting points, there will be no decrease in welding strength or variation.
It has the excellent effect of making it possible to weld plastics with stable welding strength.
［実施例］
以下に本発明を実施例に基づいてさらに具体的
に説明する。[Examples] The present invention will be described in more detail below based on Examples.
実施例 １
試験試料として、溶接距離300mmで、ダンベル
を溶接部に沿つて５点打ち抜いたPTFE材を使用
した。溶接棒はPFAとし、４本を１束として溶
接をし、溶接強度試験を５回行ない、従来例と比
較した。なお、強度試験の引張り速度は200mm／
sec、熱風ガン（溶接装置）の熱風温度は560℃で
あつた。Example 1 A PTFE material was used as a test sample, with a welding distance of 300 mm and a dumbbell punched out at 5 points along the welded part. The welding rods were PFA, four rods were welded into a bundle, welding strength tests were conducted five times, and comparisons were made with the conventional example. The tensile speed of the strength test was 200mm/
sec, the hot air temperature of the hot air gun (welding equipment) was 560°C.
本発明による二風式ノズルを使用した場合は、
溶接強度が42、41、45、43、46Kgｆ／cm2で、平均
43.4Kgｆ／cm2であつた。 When using the two-wind nozzle according to the invention,
Welding strength is 42, 41, 45, 43, 46Kgf/ cm2 , average
It was 43.4Kgf/ cm2 .
一方、従来例の一風式ノズルを使用した場合
は、溶接強度が30、46、41、34、32Kgｆ／cm2で、
平均36.6Kgｆ／cm2であつた。 On the other hand, when the conventional single-air nozzle is used, the welding strength is 30, 46, 41, 34, 32Kgf/ cm2 ,
The average value was 36.6 kgf/cm 2 .
これにより、本発明による二風式ノズルを用い
た場合、溶接強度の低下もなく、しかもばらつき
も少ないことがわかる。 This shows that when the two-wind nozzle according to the present invention is used, there is no decrease in welding strength and there is little variation.
実施例 ２
試験条件は実施例１の場合と同様にして溶接強
度試験を行なつたが、異なる作業員Ａ、Ｂ、Ｃそ
れぞれに本発明に係る二風式ノズルと従来から用
いられている一風式ノズルとによつて溶接させ、
結果を比較した。Example 2 A welding strength test was conducted under the same test conditions as in Example 1, but different workers A, B, and C were tested using the two-air nozzle according to the present invention and the conventional one. Welded by wind nozzle,
The results were compared.
（作業員 Ａ）
二風式ノズルでは溶接強度が40、38、41、39、
40Kgｆ／cm2で、平均39.6Kgｆ／cm2であつた。従来
の一風式ノズルでは溶接強度が38、33、20、40、
37Kgｆ／cm2で平均33.6Kgｆ／cm2であつた。(Worker A) The welding strength of the two-wind nozzle is 40, 38, 41, 39,
It was 40Kgf/cm 2 and the average was 39.6Kgf/cm 2 . Conventional single-air nozzles have welding strengths of 38, 33, 20, 40,
It was 37Kgf/cm 2 and the average was 33.6Kgf/cm 2 .
（作業員 Ｂ）
二風式ノズルでは溶接強度が42、40、41、40、
39Kgｆ／cm2で、平均40.2Kgｆ／cm2であつた。一風
式ノズルでは溶接強度が46、40、30、37、38Kg
ｆ／cm2で平均38.2Kgｆ／cm2であつた。(Worker B) The welding strength of the two-wind nozzle is 42, 40, 41, 40,
It was 39Kgf/cm 2 and the average was 40.2Kgf/cm 2 . Welding strength is 46, 40, 30, 37, 38Kg for single wind nozzle
f/cm 2 and averaged 38.2 kgf/cm 2 .
（作業員 Ｃ）
二風式ノズルでは溶接強度が40、38、41、37、
４Kgｆ／cm2で、平均39.4Kgｆ／cm2であつた。一風
式ノズルでは溶接強度が30、31、40、27、30Kg
ｆ／cm2で平均31.6Kgｆ／cm2であつた。(Worker C) The welding strength of the two-wind nozzle is 40, 38, 41, 37,
It was 4Kgf/cm 2 and the average was 39.4Kgf/cm 2 . Welding strength is 30, 31, 40, 27, 30Kg for single wind nozzle
f/cm 2 and averaged 31.6 kgf/cm 2 .
これにより、一風式ノズルでは作業員により溶
接強度に差異がみられ、また同一作業員間でのば
らつきも多いが、二風式ノズルでは溶接強度が高
く、作業員による差異がほとんどみられず、さら
に同一作業員間でのばらつきも少ないため、多少
の溶接速度（ノズルの移動速度）の影響もほとん
ど受けない。 As a result, welding strength differs depending on the worker with the single-air nozzle, and there is also a lot of variation between the same workers, but with the two-air nozzle, welding strength is high and there are almost no differences between workers. Furthermore, since there is little variation between the same workers, it is hardly affected by slight welding speeds (nozzle movement speeds).
第１図は本発明に係るプラスチツク溶接装置の
要部側面図、第２図は第１図の要部拡大図、第３
図はプラスチツク溶接装置の従来例を示す要部側
面図、第４図は被溶接部材の溶接途中を示す平面
図である。
１，２０……溶接装置（溶接ガン）、２……二
風式ノズル、３……第１の熱風吹出口（第１の加
熱手段）、４……第２の熱風吹出口（第２の加熱
手段）、６，２１…………溶接棒ホルダー、７…
…溶接棒、８，２４……ローラ、９……被溶接部
材、１０……被溶接部、２２……熱風吹出口、２
３……一風式ノズル、〓1……第１の熱風吹出口
の吹出角度、〓2……第２の熱風吹出口の吹出角
度。
FIG. 1 is a side view of the main parts of a plastic welding device according to the present invention, FIG. 2 is an enlarged view of the main parts of FIG. 1, and FIG.
FIG. 4 is a side view of a main part of a conventional plastic welding apparatus, and FIG. 4 is a plan view showing a part to be welded in the middle of welding. 1, 20... Welding device (welding gun), 2... Two-air nozzle, 3... First hot air outlet (first heating means), 4... Second hot air outlet (second heating means), 6, 21... welding rod holder, 7...
...Welding rod, 8, 24...Roller, 9...Member to be welded, 10...Part to be welded, 22...Hot air outlet, 2
3... Single air nozzle, = 1 ... Blowout angle of the first hot air outlet, = 2 ... Blowout angle of the second hot air outlet.
Claims (1)
被溶接部を溶接装置から吹出される熱風によつて
加熱溶融して溶接するプラスチツクの溶接方法に
おいて、第１の加熱手段により前記被溶接部材の
被溶接部を実質的に溶融状態とした後、さらに第
２の加熱手段により溶融した被溶接部を被溶接部
材の融点以下に下がらない温度に保持すると同時
に前記溶接棒を加熱溶融し、かかる状態の該被溶
接部材の被溶接部を前記溶接棒で溶接することを
特徴とするプラスチツクの溶接方法。 ２ プラスチツクの溶接時に溶接棒を供給保持す
る溶接棒ホルダーと、該溶接棒と被溶接部材の被
溶接部とを加熱溶融させる熱風吹出口を有するノ
ズルとを有するプラスチツクの溶接装置におい
て、前記ノズルの熱風吹出口が第１の熱風吹出口
と第２の熱風吹出口とから成り、第２の熱風吹出
口が溶接棒と被溶接部との当接部方向に向けて開
口しており、第１の熱風吹出口が前記当接部より
も溶接装置の進行方向前方の被溶接部に向けて開
口していることを特徴とするプラスチツクの溶接
装置。 ３ 前記第１の熱風吹出口の吹出口角度が被溶接
部の平面に対して35〜75度、前記第２の熱風吹出
口の吹出口角度が35〜65度である請求項第２項に
記載のプラスチツクの溶接装置。[Scope of Claims] 1. A plastic welding method in which a welding rod is applied to a part of a member to be welded, and the part to be welded is heated and melted by hot air blown from a welding device. After the welding part of the welding member is brought into a substantially molten state by the heating means, the second heating means maintains the melted welding part at a temperature that does not drop below the melting point of the welding member, and simultaneously performs the welding. A method of welding plastics, which comprises heating and melting a rod, and welding the welded portion of the member to be welded in this state with the welding rod. 2. A plastic welding device comprising a welding rod holder for supplying and holding a welding rod during plastic welding, and a nozzle having a hot air outlet for heating and melting the welding rod and a welded part of a welded member, The hot air outlet is composed of a first hot air outlet and a second hot air outlet, the second hot air outlet is open toward the abutment area between the welding rod and the welded part, and the first hot air outlet is A plastic welding device characterized in that a hot air outlet is opened toward a part to be welded ahead of the abutting part in the direction of movement of the welding device. 3. According to claim 2, wherein the first hot air outlet has an outlet angle of 35 to 75 degrees with respect to the plane of the welded part, and the second hot air outlet has an outlet angle of 35 to 65 degrees. The described plastic welding equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63245367A JPH0292520A (en) | 1988-09-29 | 1988-09-29 | Welding of plastic and apparatus for welding |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63245367A JPH0292520A (en) | 1988-09-29 | 1988-09-29 | Welding of plastic and apparatus for welding |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0292520A JPH0292520A (en) | 1990-04-03 |
| JPH0586908B2 true JPH0586908B2 (en) | 1993-12-14 |
Family
ID=17132612
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63245367A Granted JPH0292520A (en) | 1988-09-29 | 1988-09-29 | Welding of plastic and apparatus for welding |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0292520A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2024017064A (en) * | 2022-07-27 | 2024-02-08 | 川本化成株式会社 | Airless heat conduction welding gun for plastics |
-
1988
- 1988-09-29 JP JP63245367A patent/JPH0292520A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0292520A (en) | 1990-04-03 |
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