JP3301636B2 - Welding method - Google Patents
Welding methodInfo
- Publication number
- JP3301636B2 JP3301636B2 JP23164292A JP23164292A JP3301636B2 JP 3301636 B2 JP3301636 B2 JP 3301636B2 JP 23164292 A JP23164292 A JP 23164292A JP 23164292 A JP23164292 A JP 23164292A JP 3301636 B2 JP3301636 B2 JP 3301636B2
- Authority
- JP
- Japan
- Prior art keywords
- groove
- welding
- digging
- welded
- excavation
- 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 - Fee Related
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
- 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
Landscapes
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、ポリアリーレンスルフ
ィドを主とする成形体同士の溶接方法に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for welding molded articles mainly composed of polyarylene sulfide.
【０００２】[0002]
【従来の技術】従来、様々な合成樹脂により成形体が成
形され利用されている。例えば、ポリ塩化ビニル、ポリ
プロピレン、ポリエチレン等の配管材料は汎用材料とし
て、住宅、工場等の水配管や化学薬品配管に幅広く使用
されている。この際配管同士の接続や装置内での機器と
の接続のために溶接が行われる。その溶接方法には通
常、熱板を用いる方法、溶接棒を用いる方法、接着剤を
用いる方法等があるが、前二者の場合には全開先或いは
部分開先を設ける方法が採用されてきた。2. Description of the Related Art Conventionally, molded articles are formed from various synthetic resins and used. For example, piping materials such as polyvinyl chloride, polypropylene, and polyethylene are widely used as general-purpose materials for water piping and chemical piping in houses and factories. At this time, welding is performed for connection between pipes and connection with equipment in the apparatus. Usually, the welding method includes a method using a hot plate, a method using a welding rod, a method using an adhesive, and the like, and in the case of the former two, a method of providing a full groove or a partial groove has been adopted. .
【０００３】溶接部分に全開先を設ける方法は勿論、部
分開先を設ける溶接方法でも、開先部先端の裏側に大き
なビードが出来、例えば微粒子の滞留や微生物の繁殖を
防ぐことが要請されている超純水用配管等の分野では、
溶接によってできるビードが大きな問題となっている。[0003] In addition to the method of providing a full groove at the welded portion, the welding method of providing a partial groove forms a large bead on the back side of the tip of the groove, and is required to prevent, for example, stagnation of fine particles and propagation of microorganisms. In fields such as ultrapure water piping,
Beads formed by welding are a major problem.
【０００４】[0004]
【発明が解決しようとする課題】本発明の目的は、実質
的に直鎖状のポリアリーレンスルフィドを主とする成形
体同士を溶接する際、実用物性を発現しつつ且つ生成す
るビードを小さくする方法を提示することにある。SUMMARY OF THE INVENTION An object of the present invention is to reduce the bead produced while exhibiting practical physical properties when welding molded articles mainly composed of substantially linear polyarylene sulfide. The idea is to present a method.
【０００５】[0005]
【課題を解決するための手段】本発明の要旨とするとこ
ろは実質的に直鎖状のポリアリーレンスルフィドを主と
する成形体同士を溶接するに当たり、溶接されるべき端
面の相対する二箇所に開先を設け、その内の一方は他方
に比し開先の削掘によって除去される部分を大きくし、
且つ開先の削掘によって除去されない溶接部断面積を、
開先を削掘する以前の被溶接部断面積の５〜５０％と
し、その開先の削掘によって除去される部分の大きい方
に溶接棒を押圧して溶接することを特徴とする溶接方法
にある。SUMMARY OF THE INVENTION The gist of the present invention is to weld a molded article mainly composed of substantially linear polyarylene sulfide to two opposing end faces to be welded. Provide a groove, one of which increases the part removed by the digging of the groove compared to the other,
And the weld cross-sectional area that is not removed by
A welding method characterized in that a groove is set to 5 to 50% of a cross-sectional area of a portion to be welded before excavation, and a welding rod is pressed against a larger portion to be removed by excavation of the groove to perform welding. It is in.
【０００６】以下、本発明を詳細に説明する。Hereinafter, the present invention will be described in detail.
【０００７】本発明が対象とするポリアリーレンスルフ
ィドとは、−（−Ａｒ−Ｓ−）−［ここで“−Ａｒ−”
はアリーレン基を意味する］を主構成要素とするポリマ
ーを意味する。ここでアリーレン基とは、広義に用いる
ものであり、ｐ−フェニレン、ｍ−フェニレン、ｏーフ
ェニレン、２，６−ナフチレン、４，４’−ビフェニレ
ン、或いは、−Ｐｈ−Ｏ−Ｐｈ−（ここで“−Ｐｈ−”
はフェニレン基を意味する。以下同様）、ーＰｈ−ＣＨ
2−Ｐｈ−、−Ｐｈ−ＳＯ2−Ｐｈ−等の如き少なくとも
２個の炭素数６の芳香環を含む２価の芳香族残基を包含
する。尚、各芳香環には例えばＦ、Ｃｌ、Ｂｒ、ＣＨ3
等の置換基が導入されていても良い。また、これらはホ
モポリマーであっても良いし、ランダム共重合体であっ
ても良いし、ブロック共重合体であっても良い。The polyarylene sulfide targeted by the present invention is-(-Ar-S-)-[where "-Ar-"
Represents an arylene group] as a main component. Here, the arylene group is used in a broad sense, and includes p-phenylene, m-phenylene, o-phenylene, 2,6-naphthylene, 4,4'-biphenylene, or -Ph-O-Ph- (where "-Ph-"
Represents a phenylene group. The same applies hereinafter), -Ph-CH
It includes a divalent aromatic residue containing at least two aromatic rings having 6 carbon atoms, such as 2- Ph-, -Ph-SO2-Ph- and the like. Each aromatic ring has, for example, F, Cl, Br, CH 3
And the like may be introduced. Further, these may be a homopolymer, a random copolymer, or a block copolymer.
【０００８】中でもフェニレン基、特にパラフェニレン
基を主構成要素とするものが好適である。尚ここで主構
成要素とは−（−Ａｒ−Ｓ−）−を１基本モルとして計
算したときに、５０基本モル％以上を意味する。好適に
は７０基本モル％以上、より好適には９０基本モル％以
上のものが用いられる。Among them, those having a phenylene group, particularly a paraphenylene group as a main constituent element are preferred. Here, the main constituent means 50% by mol or more when-(-Ar-S-)-is calculated as one basic mol. Preferably at least 70 base mol%, more preferably at least 90 base mol% is used.
【０００９】本発明においては上記ポリアリーレンスル
フィドを主とするもののうち、実質的に直鎖状の高分子
量のものが用いられる。ここで実質的に直鎖状の高分子
量ポリアリ−レンスルフィドとは実質的に２官能性モノ
マ−を主体とするモノマ−から得られるポリマ−を云
う。したがって少量の多官能性単量体を構成単位として
存在させたものであっても良い。In the present invention, among the above-mentioned polyarylene sulfides, those having a substantially linear high molecular weight are used. The term "substantially linear high molecular weight polyarylene sulfide" as used herein refers to a polymer obtained from a monomer mainly composed of a bifunctional monomer. Therefore, a small amount of a polyfunctional monomer may be present as a constituent unit.
【００１０】本発明におけるポリアリ−レンスルフィド
よりなる成形物としては、ポリアリ−レンスルフィド単
独の他、ポリアリ−レンスルフィドを主とする組成物の
成形体を指す。組成物としては例えば耐衝撃強化剤、強
化繊維、無機物充填剤等が包含される。The molded article of polyarylene sulfide in the present invention refers to a molded article of a composition mainly composed of polyarylene sulfide in addition to polyarylene sulfide alone. The composition includes, for example, impact modifiers, reinforcing fibers, inorganic fillers, and the like.
【００１１】本発明において用いられる溶接棒も実質的
に直鎖状のポリアリーレンスルフィドを主とするものが
用いられ、好適には溶接されるべき成形体と同一の構成
のものが用いられる。The welding rod used in the present invention is mainly composed of substantially linear polyarylene sulfide, and preferably has the same constitution as the molded article to be welded.
【００１２】図１に示すように本発明においては成形体
１の溶接されるべき端面の相対する二箇所に開先Ａ、Ｂ
を設け、そのうちの一方Ａは他方Ｂに比し開先の削掘に
よって除去される部分を大きくする。開先の削掘によっ
て除去された部分が小さい方の体積は、開先の削掘によ
って除去された部分の大きい方の体積の０．５〜３０
％、好ましくは１〜２０％、更に好ましくは１．５〜１
５％である。０．５％より小さいとビードを小さくする
ことができず、また３０％より大きいと接合強度が低下
するためである。As shown in FIG. 1, in the present invention, grooves A and B are formed at two opposing ends of a molded body 1 to be welded.
Of which one A has a larger portion to be removed by digging the groove than the other B. The smaller volume of the portion removed by the groove excavation is 0.5 to 30 times the larger volume of the portion removed by the groove excavation.
%, Preferably 1-20%, more preferably 1.5-1%
5%. If it is less than 0.5%, the bead cannot be reduced, and if it is more than 30%, the joining strength is reduced.
【００１３】また開先の削掘によって除去されない溶接
部２の厚さｔは、成形体の溶接する部分の厚さＴの５〜
５０％、好ましくは５〜４０％、更に好ましくは５〜３
０％の大きさに調整する。開先の削掘によって除去され
ない溶接部２の厚さｔが成形物の溶接する部分の厚さＴ
の５％未満の場合、図１における溶接棒３と反対側の成
形体表面に生ずるビードが大きくなってしまい、好まし
くないためであり、また、開先の削掘によって除去され
ない溶接部の厚さｔが成形物の溶接する部分の厚さＴの
５０％より大きな場合、例えば、引張物性や耐衝撃性等
の溶接部の実用物性が発現できず好ましくないためであ
る。The thickness t of the welded portion 2 which is not removed by the excavation of the groove is 5 to 5 times the thickness T of the portion to be welded of the compact.
50%, preferably 5 to 40%, more preferably 5 to 3
Adjust to 0% size. The thickness t of the welded portion 2 that is not removed by the digging of the groove is the thickness T of the welded portion of the molded product.
If it is less than 5%, the bead generated on the surface of the molded body opposite to the welding rod 3 in FIG. 1 becomes large, which is not preferable, and the thickness of the welded portion which is not removed by the digging of the groove If t is larger than 50% of the thickness T of the portion to be welded of the molded product, it is not preferable because practical physical properties of the weld such as tensile properties and impact resistance cannot be exhibited.
【００１４】本発明では上記のようにして調整された開
先の削掘によって除去される部分の大きい方に溶接棒を
押圧して溶接する。溶接棒によって融解した樹脂の大部
分は溶接棒自体を構成する樹脂と共に開先Ａの部分にお
いて溶融接合面を構成し、一部は押圧されつつ開先Ｂの
部分にも溶融接合面を構成する。従来技術においては開
先は一箇所しか設けないため、溶接棒により押圧されて
例えばパイプであれば内側にビードがかなり大きなもの
とならざるを得なかったのであるが、本発明によれば開
先Ｂの存在によりビードは小さくすることができる。In the present invention, welding is performed by pressing a welding rod on the larger one of the portions removed by the digging of the groove adjusted as described above. Most of the resin melted by the welding rod together with the resin constituting the welding rod itself forms a fusion bonding surface at the groove A portion, and a portion also forms a fusion bonding surface at the groove B portion while being pressed. . In the prior art, there is only one groove, so if the pipe is pressed by a welding rod, for example, if it is a pipe, the bead inside must be quite large, but according to the present invention, the groove is The bead can be reduced by the presence of B.
【００１５】開先の削掘によって除去される部分の大き
い方の開先角θAは好ましくは１０〜６０゜、より一層
好ましくは１５〜５０゜、特に好ましくは２０〜４５゜
に調整する。開先角θAが１０゜未満の場合、溶接部分
を十分に溶融することが難しく、また６０゜より大きな
場合、開先部分が大きくなりすぎ均一な溶接をすること
が難しいためである。尚、開先の削掘によって除去され
る部分の小さい方の開先角θBは特に限定されない。The larger groove angle θ A of the portion to be removed by excavation of the groove is adjusted to preferably 10 to 60 °, more preferably 15 to 50 °, and particularly preferably 20 to 45 °. If it is less than the groove angle theta A is 10 °, it is difficult to sufficiently melt the welded portion, and if greater than 60 degrees, it is difficult for the groove portion is a result too uniform weld large. Incidentally, GMA angle theta B of smaller portion removed by Kezuho of the groove is not particularly limited.
【００１６】本発明における溶接のための装置に関して
は特に特殊なものは必要ではなく、ポリアリーレンスル
フィドからなる成形体及び溶接棒を溶融温度以上に加熱
可能な装置であれば使用できる。従って、通常プラスチ
ックの溶接に使用されるヒートガン等の装置が使用でき
る。その際の加熱媒体として窒素、アルゴン等の不活性
ガスが好ましいが、酸素含有ガスであっても良い。The apparatus for welding in the present invention does not need to be particularly special, and any apparatus can be used as long as it can heat a molded article made of polyarylene sulfide and a welding rod to a melting temperature or higher. Therefore, a device such as a heat gun which is usually used for welding plastics can be used. As the heating medium at this time, an inert gas such as nitrogen or argon is preferable, but an oxygen-containing gas may be used.
【００１７】[0017]
【試験法】引張強度の測定は材料が塩化ビニ−ル樹脂の
替わりにポリフェニレンスルフィドである他はＪＩＳＫ
６７４２に従った。また温度はそれぞれ熱電対により測
定した。[Test method] The tensile strength was measured by JISK except that the material was polyphenylene sulfide instead of vinyl chloride resin.
6742. The temperature was measured by a thermocouple.
【００１８】[0018]
【実施例１】直鎖状ポリフェニレンスルフィドからなる
厚さＴが３ｍｍ、１２０ｍｍ角の平板２枚の溶接すべき
端面の上方に、開先の削掘によって除去される部分の大
きい方の開先を設けた。その角θAは３０゜、除去され
た厚みｔAは２．３ｍｍであった。またこの開先と相対
する位置である端面の下方に、開先の削掘によって除去
される部分の小さい方の開先を設けた。その角θBは４
５゜、除去された厚みtBは０．２ｍｍであった。開先の
削掘によって除去された部分の小さい方の体積は開先の
削掘によって除去された部分の大きい方の体積の３％で
あった。さらに溶接棒は直鎖状ポリフェニレンスルフィ
ドからなる３ｍｍφの丸棒を用いた。Example 1 A large groove having a portion to be removed by digging of a groove is placed above the end face of two flat plates having a thickness T of 3 mm and 120 mm square made of linear polyphenylene sulfide to be welded. Provided. The angle θ A was 30 °, and the removed thickness t A was 2.3 mm. In addition, below the end face, which is a position facing the groove, a groove having a smaller portion to be removed by excavation of the groove is provided. The angle θ B is 4
5 °, the removed thickness t B was 0.2 mm. The smaller volume of the portion removed by the groove excavation was 3% of the larger volume of the portion removed by the groove excavation. Further, as the welding rod, a round rod of 3 mmφ made of linear polyphenylene sulfide was used.
【００１９】溶接はライスター型ヒートガンを使用し、
熱風は窒素ガスであり、その温度は４００℃、溶接棒押
し付け荷重約１ｋｇｆ、溶接速度約１ｍ／分で行った。For welding, use a Leister type heat gun.
The hot air was nitrogen gas, the temperature was 400 ° C., the welding rod pressing load was about 1 kgf, and the welding speed was about 1 m / min.
【００２０】このような溶接により溶接棒と反対側の溶
接部のビードの大きさは１ｍｍであった。また、溶接部
より試験片を切り出し引張強度を測定したところ、未溶
接部の強度が７５０ｋｇｆ／ｃｍ2に対し、溶接部の引
張強度は７４０ｋｇｆ／ｃｍ2であった。By such welding, the size of the bead at the welded portion opposite to the welding rod was 1 mm. Further, when a test piece was cut out from the welded portion and the tensile strength was measured, the tensile strength of the welded portion was 740 kgf / cm 2 while the strength of the unwelded portion was 750 kgf / cm 2 .
【００２１】[0021]
【比較例１】θBを０゜、即ち開先の削掘によって除去
された部分の小さい方を設けなかった他は実施例１と同
様に行ったところ、溶接部の引張強度は７６０ｋｇｆ／
ｃｍ2であり、溶接部と反対側のビードは１．７ｍｍで
あった。COMPARATIVE EXAMPLE 1 The same procedure as in Example 1 was carried out except that θ B was 0 °, that is, the smaller portion of the portion removed by digging of the groove was not provided. The tensile strength of the welded portion was 760 kgf /
cm 2 and the bead on the opposite side of the weld was 1.7 mm.
【００２２】[0022]
【発明の効果】本発明によればビードが小さく、接着強
度の大きな溶接が簡単な管理の下に可能となった。According to the present invention, welding with a small bead and a high adhesive strength can be performed under a simple control.
【図１】溶接方法を示す説明図である。FIG. 1 is an explanatory view showing a welding method.
１ 成形体 ２ 開先を取らない部分 ３ 溶接棒 Ｔ 成形体の溶接する部分の厚さ ｔ 開先を設けない部分２の厚さ θA 開先の削掘によって除去される部分の大きい方
の開先角 θB 開先の削掘によって除去される部分の小さい方
の開先角 ｔA 開先の削掘によって除去される部分の大きい方
の開先により削掘された厚さ ｔB 開先の削掘によって除去される部分の小さい方
の開先により削掘された厚さDESCRIPTION OF SYMBOLS 1 Molded part 2 Part which does not take a groove 3 Welding rod T Thickness of part to be welded of a molded body t Thickness of part 2 without a groove θ A the larger groove Kezuho to thickness t B opened by the portion to be removed by Kezuho of GMA angle t a groove of smaller portion removed by groove angle theta B groove of Kezuho Thickness cut by the smaller bevel of the portion removed by the previous cut
Claims (4)
ィドを主とする成形体同士を溶接するに当たり、溶接さ
れるべき端面の相対する二箇所に開先を設け、その内の
一方は他方に比し開先の削掘によって除去される部分を
大きくし、且つ開先の削掘によって除去されない溶接部
断面積を、開先を削掘する以前の被溶接部断面積の５〜
５０％とし、その開先の削掘によって除去される部分の
大きい方に溶接棒を押圧して溶接することを特徴とする
溶接方法。1. In welding molded articles mainly composed of substantially linear polyarylene sulfide, grooves are provided at two opposite ends of an end face to be welded, one of which is provided with the other. In comparison, the portion removed by the digging of the groove is enlarged, and the welded cross-sectional area that is not removed by the digging of the groove is 5 to 5 times the cross-sectional area of the welded portion before the digging of the groove.
A welding method characterized in that welding is performed by pressing a welding rod to a larger one of the portions to be removed by excavation of the groove.
さい方の体積は、開先の削掘によって除去された部分の
大きい方の体積の０．５〜３０％であることを特徴とす
る請求項１の溶接方法。2. The method according to claim 1, wherein a smaller volume of the portion removed by the digging of the groove is 0.5 to 30% of a larger volume of the portion removed by the digging of the groove. The welding method according to claim 1, wherein the welding is performed.
ことを特徴とする請求項１の溶接方法。3. The welding method according to claim 1, wherein the hot air at the time of performing the welding is an inert gas.
きい方の開先角θAを１０〜６０゜とすることを特徴と
する請求項１の溶接方法。4. The welding method according to claim 1, wherein the larger groove angle .theta.A of the portion to be removed by excavation of the groove is 10 to 60 degrees.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23164292A JP3301636B2 (en) | 1992-08-07 | 1992-08-07 | Welding method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23164292A JP3301636B2 (en) | 1992-08-07 | 1992-08-07 | Welding method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0655639A JPH0655639A (en) | 1994-03-01 |
| JP3301636B2 true JP3301636B2 (en) | 2002-07-15 |
Family
ID=16926700
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23164292A Expired - Fee Related JP3301636B2 (en) | 1992-08-07 | 1992-08-07 | Welding method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3301636B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003181930A (en) * | 2001-12-18 | 2003-07-03 | Suzuka Fuji Xerox Co Ltd | Composite resin molded article and its recycling method |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5631191B2 (en) | 2010-12-21 | 2014-11-26 | 矢崎総業株式会社 | connector |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5631191B2 (en) | 2010-12-21 | 2014-11-26 | 矢崎総業株式会社 | connector |
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| JPH0655639A (en) | 1994-03-01 |
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