JP2554710B2 - Method of manufacturing heating mat - Google Patents
Method of manufacturing heating matInfo
- Publication number
- JP2554710B2 JP2554710B2 JP17480788A JP17480788A JP2554710B2 JP 2554710 B2 JP2554710 B2 JP 2554710B2 JP 17480788 A JP17480788 A JP 17480788A JP 17480788 A JP17480788 A JP 17480788A JP 2554710 B2 JP2554710 B2 JP 2554710B2
- Authority
- JP
- Japan
- Prior art keywords
- heating
- mat
- resin
- heating mat
- resin sheet
- 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
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29D—PRODUCING PARTICULAR ARTICLES FROM PLASTICS OR FROM SUBSTANCES IN A PLASTIC STATE
- B29D23/00—Producing tubular articles
- B29D23/001—Pipes; Pipe joints
- B29D23/003—Pipe joints, e.g. straight joints
- B29D23/005—Pipe joints, e.g. straight joints provided with electrical wiring
-
- 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
- B29C53/00—Shaping by bending, folding, twisting, straightening or flattening; Apparatus therefor
- B29C53/32—Coiling
-
- 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
- B29C69/00—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore
- B29C69/001—Combinations of shaping techniques not provided for in a single one of main groups B29C39/00 - B29C67/00, e.g. associations of moulding and joining techniques; Apparatus therefore a shaping technique combined with cutting, e.g. in parts or slices combined with rearranging and joining the cut parts
- B29C69/002—Winding
-
- 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
- B29C2793/00—Shaping techniques involving a cutting or machining operation
-
- 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
- B29K2995/0005—Conductive
-
- 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
- B29L2009/00—Layered products
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Moulding By Coating Moulds (AREA)
- Lining Or Joining Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】 （産業上の利用分野） 本発明は、合成樹脂製のガス管や水道管の配管路の途
中に分岐継手を溶着接合する溶着継手の成形に使用され
る加熱マットの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a heating mat used for forming a welding joint for welding a branch joint in the middle of a pipeline of a synthetic resin gas pipe or water pipe. It relates to a manufacturing method.
（従来の技術） 従来、合成樹脂管の管壁に分岐部を形成するために用
いられる分岐継手の成形に用いられる加熱マットの製造
方法としては、例えば、特開昭58−65624号公報等に記
載されているような方法が知られている。(Prior Art) Conventionally, as a method for producing a heating mat used for forming a branch joint used to form a branch portion on a pipe wall of a synthetic resin pipe, for example, JP-A-58-65624 is disclosed. Methods as described are known.
この従来方法は、加熱要素として導電線が用いられた
もので、片面に螺旋状の溝を有する樹脂マットを成形す
るマット成形工程と、前記樹脂マットの溝に導電線を挿
入する導電線挿入工程と、導電線が溝から逸脱しないよ
うに固定する導電線固定工程とで構成されていた。In this conventional method, a conductive wire is used as a heating element, and a mat forming step of molding a resin mat having a spiral groove on one side and a conductive wire inserting step of inserting a conductive wire into the groove of the resin mat. And the conductive wire fixing step of fixing the conductive wire so as not to deviate from the groove.
（発明が解決しようとする課題） しかしながら、このような従来の加熱マットの製造方
法にあっては、製造工程が複雑で手間を要すると共に、
導電線挿入工程において導電線にテンションをかけるた
め、導電線が破断し易いという問題があった。(Problems to be Solved by the Invention) However, in such a conventional heating mat manufacturing method, the manufacturing process is complicated and time-consuming, and
Since a tension is applied to the conductive wire in the conductive wire insertion step, there is a problem that the conductive wire is easily broken.
本発明は、上記のような問題に着目し、製造工程を簡
略化して短時間で加熱マットを製造することができると
共に、確実に加熱機能を発揮できる加熱マットを製造す
ることができる製造方法を提供するものである。The present invention focuses on the above-mentioned problems and simplifies the manufacturing process to manufacture a heating mat in a short time, and at the same time, provides a manufacturing method capable of manufacturing a heating mat capable of reliably exhibiting a heating function. It is provided.
（課題を解決するための手段） 本発明は、上述のような課題を解決することを目的と
してなされたもので、この目的達成のために、本発明の
加熱マットの製造方法は、継手本体の内周部に配設され
た加熱要素を加熱することによって合成樹脂管と溶着接
合可能な継手の成形に用いられる加熱マットの製造方法
において、熱可塑性樹脂層に、加熱要素層がラミネート
されている樹脂シートを芯材に渦巻き状に巻き付ける巻
付工程と、該巻付工程で巻かれた前記樹脂シートを、軸
方向に所定厚で切断してマット状に形成する切断工程と
で構成されている方法である。(Means for Solving the Problems) The present invention has been made for the purpose of solving the above problems. To achieve this object, the method for manufacturing a heating mat according to the present invention is In a method for producing a heating mat used for forming a joint that can be fusion-bonded to a synthetic resin pipe by heating a heating element arranged on the inner peripheral portion, a heating element layer is laminated on a thermoplastic resin layer. It is composed of a winding step of spirally winding a resin sheet around a core material, and a cutting step of cutting the resin sheet wound in the winding step to a mat shape by cutting the resin sheet in a predetermined thickness in the axial direction. Is the way.
（作 用） 加熱マットを製造するにあたっては、熱可塑性樹脂層
に加熱要素層がラミネートされている樹脂シートを用
い、この樹脂シートを芯材に対して渦巻き状に巻き付け
ていく（巻付工程）。(Working) When manufacturing a heating mat, a resin sheet in which a heating element layer is laminated on a thermoplastic resin layer is used, and this resin sheet is spirally wound around a core material (wrapping process) .
次に、巻き終えた樹脂シートを、カッター等で軸方向
に所定厚で切断する（切断工程）。Next, the wound resin sheet is cut into a predetermined thickness in the axial direction with a cutter or the like (cutting step).
こうして加熱マットの製造は完了する。製造されたマ
ットは、継手成形時に、合成樹脂管を接続する継手本体
の内周部にインサートされる。Thus, the production of the heating mat is completed. The manufactured mat is inserted into the inner peripheral portion of the joint body connecting the synthetic resin pipes at the time of molding the joint.
（実施例） 以下、本発明の実施例を第１図〜第５図により詳述す
る。(Example) Hereinafter, an example of the present invention will be described in detail with reference to Figs.
尚、本実施例では、継手として第４図及び第５図に示
すような分岐継手Ａを例にとり、この分岐継手Ａの成形
に用いられる加熱マット１の製造方法について説明す
る。In this example, a branch joint A as shown in FIGS. 4 and 5 is taken as an example of the joint, and a method for manufacturing the heating mat 1 used for forming the branch joint A will be described.
本実施例の加熱マット１の製造方法は、巻付工程，切
断工程の順で行われる。The manufacturing method of the heating mat 1 of this embodiment is performed in the order of the winding step and the cutting step.
（巻付工程） まず、ポリエチレン樹脂により形成された厚さ1mmの
熱可塑性樹脂層21の片面に、MnNi（合金）により形成さ
れた厚さ0.35mmの加熱要素層22がラミネートされている
樹脂シート２を用意し、この樹脂シート２を、第１図に
示すように円筒状の芯材３に対して加熱要素層22を内側
にして端から巻き付けていく。(Wrapping Step) First, a resin sheet in which a 0.35 mm thick heating element layer 22 made of MnNi (alloy) is laminated on one surface of a 1 mm thick thermoplastic resin layer 21 made of polyethylene resin. 2 is prepared, and the resin sheet 2 is wound from the end with the heating element layer 22 inside the cylindrical core material 3 as shown in FIG.
この時、多少テンションを加えながら巻き付け、樹脂
シート２間の密着性を確保する。At this time, the resin sheets 2 are wound while being slightly tensioned to secure the adhesion between the resin sheets 2.
そして、最終的な巻数が22巻になるようにする。 And make the final number of turns 22.
尚、使用する樹脂シート２は、熱可塑性樹脂層21が、
ポリエチレン樹脂以外では例えばポリプロピレン樹脂，
ポリ塩化ビニル樹脂，ポリブデン樹脂等で形成され、ま
た加熱要素層22が、MnNi合金以外では例えばNiやCu等で
形成されているものが適している。The resin sheet 2 used has a thermoplastic resin layer 21
Other than polyethylene resin, for example polypropylene resin,
It is suitable that the heating element layer 22 is made of polyvinyl chloride resin, polybutene resin, or the like, and the heating element layer 22 is made of, for example, Ni or Cu other than the MnNi alloy.
また、樹脂シート２の厚みは、熱可塑性樹脂層21の厚
みが0.9〜1.2mm、加熱要素層22の厚みが0.2〜0.9mmに設
定するのが望ましい。更に巻き終わった樹脂シート２
は、巻数が15〜25巻、外径が100〜150mmになるのが好ま
しい。The thickness of the resin sheet 2 is preferably set such that the thermoplastic resin layer 21 has a thickness of 0.9 to 1.2 mm and the heating element layer 22 has a thickness of 0.2 to 0.9 mm. Further rolled resin sheet 2
It is preferable that the number of turns is 15 to 25 and the outer diameter is 100 to 150 mm.
（切断工程） 次に、芯材３に巻き付けられている樹脂シート２を、
第２図に示すように、カッター等により芯材３と共に軸
方向へ厚さ0.4mmのマット状に切断していく。(Cutting Step) Next, the resin sheet 2 wound around the core material 3 is
As shown in FIG. 2, it is cut along with the core material 3 in the axial direction into a mat having a thickness of 0.4 mm by a cutter or the like.
尚、切断厚は、厳密に0.4mmに設定する必要はない
が、望ましくは0.3〜1.0mmに設定する。The cutting thickness need not be strictly set to 0.4 mm, but is preferably set to 0.3 to 1.0 mm.
以上の工程を経て加熱マット１は製造される。 The heating mat 1 is manufactured through the above steps.
本実施例の加熱マット１の製造方法では、従来方法の
ように導電線を溝に挿入したり、導電線を樹脂マットに
固定したりする面倒な工程がなく、製造工程が簡略化さ
れているので、作業効率が向上し、短時間で加熱マット
１を製造することができる。In the method for manufacturing the heating mat 1 of the present embodiment, unlike the conventional method, there is no troublesome step of inserting the conductive wire into the groove or fixing the conductive wire to the resin mat, and the manufacturing process is simplified. Therefore, the working efficiency is improved, and the heating mat 1 can be manufactured in a short time.
また、予め熱可塑性樹脂層21に加熱要素層22がラミネ
ートされている樹脂シート２を用いるので、断線の恐れ
はない。Further, since the resin sheet 2 in which the heating element layer 22 is laminated on the thermoplastic resin layer 21 in advance is used, there is no fear of disconnection.
このようにして製造された加熱マット１は、加熱要素
層22に接するようターミナルピン４を２本立設し、分岐
継手Ａを射出成形する際に、第３図に示すように、金型
５のコア51に沿わせてセットすることで、サドル部10の
内周部にインサートされる。The heating mat 1 produced in this manner has two terminal pins 4 standing upright in contact with the heating element layer 22, and when injection molding the branch joint A, as shown in FIG. By setting along the core 51, it is inserted into the inner peripheral portion of the saddle portion 10.
更に、第４図及び第５図に示すように、前記加熱マッ
ト１がサドル部10の内周部にインサートされた分岐継手
Ａは、サドル部10の内面を合成樹脂管６の外面に当接さ
せた状態で、ターミナルピン４に一定電圧をかけて通電
することにより、加熱樹脂層22が加熱してその周辺の熱
可塑性樹脂を溶融させ、合成樹脂管６を溶着接合するこ
とが可能なものである。Further, as shown in FIGS. 4 and 5, the branch joint A in which the heating mat 1 is inserted into the inner peripheral portion of the saddle portion 10 has the inner surface of the saddle portion 10 contacted with the outer surface of the synthetic resin pipe 6. In such a state, by energizing the terminal pin 4 by applying a constant voltage, the heating resin layer 22 is heated to melt the thermoplastic resin around it, and the synthetic resin pipe 6 can be welded and joined. Is.
尚、サドル部10の成形に用いる樹脂材料は、加熱マッ
ト１の熱可塑性樹脂層21と同一材料の熱可塑性樹脂を用
いることが望ましいが、必ずしも同一材料でなくてもよ
く、互いに相溶性を有するものであれば、別種類の樹脂
同士を組み合せることもできる。The resin material used for molding the saddle portion 10 is preferably the same thermoplastic resin as the thermoplastic resin layer 21 of the heating mat 1, but it is not necessarily the same material and they are compatible with each other. It is also possible to combine different types of resins as long as they are made of resin.
以上、本発明の実施例を図面により詳述してきたが、
具体的な構成はこの実施例に限られるものではなく、本
発明の要旨を逸脱しない範囲の設計変更等があっても本
発明に含まれる。The embodiment of the present invention has been described in detail above with reference to the drawings.
The specific configuration is not limited to this embodiment, and even if there are design changes and the like within the scope of the present invention, they are included in the present invention.
例えば実施例では、円筒状の芯材を用いたが、四角筒
状の芯材を用いる等により加熱マットの形状を変えても
よい。また、芯材は筒状に限らず、棒状のものを用いて
もよい。For example, although the cylindrical core material is used in the embodiments, the shape of the heating mat may be changed by using a square tube core material. Further, the core material is not limited to the cylindrical shape, and a rod-shaped material may be used.
また、実施例では、巻付工程において樹脂シート間の
密着性をテンションのみで確保したが、接着剤を用いて
もよい。Further, in the embodiment, the adhesion between the resin sheets is secured only by the tension in the winding step, but an adhesive may be used.
（発明の効果） 以上説明してきたように、本発明の加熱マットの製造
方法にあっては、製造工程の簡略化により、短時間で加
熱マットを製造することができる。(Effects of the Invention) As described above, in the method for manufacturing a heating mat of the present invention, the heating mat can be manufactured in a short time by simplifying the manufacturing process.
また、熱可塑性樹脂層に加熱要素層がラミネートされ
ている樹脂シートを用いるので、断線の恐れがなく、確
実に加熱機能を発揮できる加熱マットを製造することが
できるという効果が得られる。Moreover, since the resin sheet in which the heating element layer is laminated on the thermoplastic resin layer is used, there is an effect that there is no fear of disconnection and a heating mat capable of reliably exhibiting a heating function can be manufactured.
第１図は本発明実施例の加熱マットの製造方法における
巻付工程を説明する樹脂シートの斜視図、第２図は本実
施例方法における切断工程を説明する樹脂シートの斜視
図、第３図は本実施例方法によって製造された加熱マッ
トを設置した分岐継手の金型を示す縦断面図、第４図及
び第５図は前記加熱マットを用いて成形された分岐継手
を示す縦断面図である。 Ａ……分岐継手（継手） 10……サドル部（継手本体） １……加熱マット ２……樹脂シート 21……熱可塑性樹脂層 22……加熱要素層FIG. 1 is a perspective view of a resin sheet illustrating a winding step in a method for manufacturing a heating mat according to an embodiment of the present invention, and FIG. 2 is a perspective view of a resin sheet illustrating a cutting step in a method according to the present embodiment. Is a longitudinal sectional view showing a mold of a branch joint having a heating mat manufactured by the method of this embodiment, and FIGS. 4 and 5 are vertical sectional views showing a branch joint molded using the heating mat. is there. A: Branch joint (joint) 10 ... Saddle part (joint body) 1 ... Heating mat 2 ... Resin sheet 21 ... Thermoplastic resin layer 22 ... Heating element layer
Claims (1)
加熱することによって合成樹脂管と溶着接合可能な継手
の成形に用いられる加熱マットの製造方法において、 熱可塑性樹脂層に、加熱要素層がラミネートされている
樹脂シートを芯材に渦巻き状に巻き付ける巻付工程と、
該巻付工程で巻かれた前記樹脂シートを、軸方向に所定
厚で切断してマット状に形成する切断工程とで構成され
ていることを特徴とする加熱マットの製造方法。1. A method for producing a heating mat used for forming a joint that can be fusion-bonded to a synthetic resin pipe by heating a heating element disposed on an inner peripheral portion of a joint body, wherein the thermoplastic resin layer comprises: A winding step of spirally winding a resin sheet on which the heating element layer is laminated,
A method of manufacturing a heating mat, comprising a cutting step of cutting the resin sheet wound in the winding step in the axial direction with a predetermined thickness to form a mat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17480788A JP2554710B2 (en) | 1988-07-12 | 1988-07-12 | Method of manufacturing heating mat |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP17480788A JP2554710B2 (en) | 1988-07-12 | 1988-07-12 | Method of manufacturing heating mat |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0224117A JPH0224117A (en) | 1990-01-26 |
| JP2554710B2 true JP2554710B2 (en) | 1996-11-13 |
Family
ID=15985009
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP17480788A Expired - Lifetime JP2554710B2 (en) | 1988-07-12 | 1988-07-12 | Method of manufacturing heating mat |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2554710B2 (en) |
-
1988
- 1988-07-12 JP JP17480788A patent/JP2554710B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0224117A (en) | 1990-01-26 |
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