JPS63292592A - Manufacture of organic ptc heater - Google Patents
Manufacture of organic ptc heaterInfo
- Publication number
- JPS63292592A JPS63292592A JP12948687A JP12948687A JPS63292592A JP S63292592 A JPS63292592 A JP S63292592A JP 12948687 A JP12948687 A JP 12948687A JP 12948687 A JP12948687 A JP 12948687A JP S63292592 A JPS63292592 A JP S63292592A
- Authority
- JP
- Japan
- Prior art keywords
- ptc heater
- core
- resistor
- resistance value
- resistance
- 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.)
- Granted
Links
- 238000004519 manufacturing process Methods 0.000 title claims description 7
- 238000000034 method Methods 0.000 claims description 5
- 239000003795 chemical substances by application Substances 0.000 claims description 2
- 238000007765 extrusion coating Methods 0.000 claims description 2
- 239000002184 metal Substances 0.000 claims description 2
- 229920000098 polyolefin Polymers 0.000 claims description 2
- 238000001125 extrusion Methods 0.000 abstract description 6
- 238000012544 monitoring process Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- 239000002344 surface layer Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
［産業上の利用分野］
本発明は有機ＰＴＣヒータの製造方法に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application] The present invention relates to a method of manufacturing an organic PTC heater.
［従来の技術及び発明が解決しようとする問題点］一般
に、有機ＰＴＣヒータの抵抗値は抵抗体押出し時の心線
予熱温度及び抵抗体押出し温度に大きく左右される。こ
のように抵抗体の抵抗値はヒータの重要な特性の一つで
あるにもかかわらず、作業中に抵抗値をチェックする方
法がない。切り分ける際にサンプルを採取して抵抗値を
実測し、これをフィードバックするしかなく、時間的ず
れが大きく、歩留りがきわめて悪い。[Prior Art and Problems to be Solved by the Invention] Generally, the resistance value of an organic PTC heater is greatly influenced by the core preheating temperature and the resistor extrusion temperature when extruding the resistor. Although the resistance value of the resistor is one of the important characteristics of the heater, there is no way to check the resistance value during operation. The only way to do this is to take a sample when cutting, measure the resistance value, and feed this back, which results in a large time lag and extremely low yield.
一方、金属ローラで抵抗体を挟み、ローラ間の抵抗を実
測する方法も提案されているが、表面層の抵抗値が内部
の抵抗値と大きく異なる場合が多く、この方法では信頼
できる値は得られない。On the other hand, a method has been proposed in which a resistor is sandwiched between metal rollers and the resistance between the rollers is actually measured, but the resistance value of the surface layer often differs greatly from the internal resistance value, and this method does not provide reliable values. I can't.
本発明はかかる事情に鑑みてなされたものであって、そ
の目的とするところは押出し作業中の抵抗体の抵抗値を
連続的に測定することにより安定した性能を有する有機
ＰＴＣヒータを製造する方法を提供することにある。The present invention has been made in view of the above circumstances, and its purpose is a method for manufacturing an organic PTC heater having stable performance by continuously measuring the resistance value of a resistor during extrusion work. Our goal is to provide the following.
［問題点を解決するための手段］
本発明の要旨は、一対の電極線に導電性付与剤を混合し
たポリオレフィンを押出し被覆して有機ＰＴＣヒータを
製造する方法において、押出機のクロスヘッド内の心金
部を一対の電極線が通過する際に電極線間が電気的に絶
縁されるよう心口金を構成し、電極線間の電気抵抗を連
続的に測定、記録することによって押出し抵抗体の抵抗
値を監視、コントロールすることを特徴とする有機ＰＴ
Ｃヒータの製造方法にある。[Means for Solving the Problems] The gist of the present invention is to provide a method for manufacturing an organic PTC heater by extrusion coating a pair of electrode wires with polyolefin mixed with a conductivity imparting agent. The core cap is configured so that the pair of electrode wires are electrically insulated when they pass through the core, and the electrical resistance between the electrode wires is continuously measured and recorded. Organic PT characterized by monitoring and controlling resistance value
C heater manufacturing method.
［実施例］ 以下、本発明を図面により説明する。[Example] Hereinafter, the present invention will be explained with reference to the drawings.
第２図は有機ＰＴＣヒータの断面図である。図において
２１は心線（撚線）、２２は抵抗体、２３は絶縁体であ
る。本発明の特徴は前記したようにこのヒータの抵抗体
押出し時の抵抗値の連続測定にあるが、心線ボビン１４
からの一対の心線１３が第１図に示すように押出機１１
のクロスヘッド１２内の心口金（図示せず）を通過する
際に電気的に絶縁されるようにしておき、クロスヘッド
１２の手前で心線１３．１３間の電気抵抗を抵抗測定器
１６により連続的に実測し、コンピュータ１７により計
算し、記録計１８により記録するようにしている。FIG. 2 is a cross-sectional view of the organic PTC heater. In the figure, 21 is a core wire (stranded wire), 22 is a resistor, and 23 is an insulator. As described above, the feature of the present invention is the continuous measurement of the resistance value when pushing out the resistor of this heater.
As shown in FIG.
The electrical resistance between the core wires 13 and 13 is measured with a resistance measuring device 16 before the crosshead 12 so that the core wires 13 and 13 are electrically insulated when passing through a core cap (not shown) in the crosshead 12. Actual measurements are taken continuously, calculated by a computer 17, and recorded by a recorder 18.
押出機１１の手前から見た心線１３．１３間の等価回路
を第３図に示す。この等価回路から心線１３．１３間の
抵抗値Ｒ６は
■
Ｒｏ＝□ ・・・ （１）Σ ｉｋ
として求められる。ｉｋは次の連立方程式を解くことに
よって求めることができる。An equivalent circuit between the core wires 13 and 13 viewed from the front of the extruder 11 is shown in FIG. From this equivalent circuit, the resistance value R6 between the core wires 13 and 13 can be found as ■ Ro=□ (1) Σ ik . ik can be obtained by solving the following simultaneous equations.
（２Ｒ１＋ｒｌ）ｉｔ ＋２Ｒ１ｉ２
＋２Ｒ１１３＋ ＝Ｖ−ｒ１ｉｔ
十（２Ｒ２＋ｒ２ ） ｉ２＋ ２ Ｒ２ｉ ３ ＋
２ Ｒ２ｉ ａ ＋ ＝０−ｒ２ ｉｚ ＋
（２Ｒ３＋ｒ３）ｉ３＋２Ｒ３１４＋
＝〇−ｒｎ−１’ｎ−１＋ （２Ｒ＋ｒ ）
ｉ ＝Ｏｎ ｎ ｎ
・・・ （２）
抵抗体のｒｋは温度依存性がきわめて高いが、抵抗体の
配合が同じ場合、抵抗値の温度係数ｆ（Ｔ）は一定であ
り、あらかじめ知ることができる。従って、抵抗体の表
面温度を連続的に実測することによって、抵抗体が室温
になったときの抵抗値ｒωを連続的に推定することが可
能である。(2R1+rl)it +2R1i2 +2R113+ =V-r1it
10 (2R2+r2) i2+ 2 R2i 3 +
2 R2i a + =0-r2 iz +
(2R3+r3)i3+2R314+
=〇-rn-1'n-1+ (2R+r)
i = On n n ... (2) The rk of a resistor has extremely high temperature dependence, but if the composition of the resistors is the same, the temperature coefficient f(T) of the resistance value is constant and cannot be known in advance. can. Therefore, by continuously measuring the surface temperature of the resistor, it is possible to continuously estimate the resistance value rω when the resistor reaches room temperature.
もちろん、この計算にはパーソナルコンピュータ等の助
けが必要である。Of course, this calculation requires the help of a personal computer or the like.
ここで−試算例を示すと次の通りである。第４図に室温
時の心線間抵抗を計算するためのグラフを示す。これを
長さ方向に１ｍ間隔で分割すると、第３図の等価回路の
ｒｋ、Ｒｋは次のようになる。Here, an example of trial calculation is as follows. FIG. 4 shows a graph for calculating the inter-core resistance at room temperature. If this is divided into 1 m intervals in the length direction, rk and Rk of the equivalent circuit in FIG. 3 are as follows.
ｋく３０のとき
Ｒｋ＝０．２Ｘ ｆ１＋０゜００３９３Ｘ１７０ｒｋ＝
１５０Ｘｅ Ｏ，３２１２Ｘ （３１−ｋ）（Ω／
ｍ ）
ｋ≧３０のとき
Ｒｋ＝０．２ （Ω／ ｍ ）ｒｋ
＝１５０ （Ω／ ｍ ）・・・
（３）
ｎ−２００として（３）式を（２）式に代入してＲ８を
求めと１３．０４Ωとなる（ｎ＝２００付近ではｎの値
の影響は少ない。）
次に、抵抗体の抵抗値が１０％増加した場合として、ｒ
ｋの代りに１．１ ｒｋ （ｋ−１−、ｋ）を用いてＲ
６の経時変化を求めると第５図のようになる。すなわち
、押出し抵抗体の抵抗値が１０％増加すると、５〜６分
間遅れて心線間抵抗が２％増加する。（引取速度５ｍ／
ｍｉｎの場合）。When k is 30, Rk=0.2X f1+0゜00393X170rk=
150Xe O, 3212X (31-k) (Ω/
m) When k≧30, Rk=0.2 (Ω/m)rk
=150 (Ω/m)...
(3) Assuming n-200, substituting equation (3) into equation (2) to find R8 yields 13.04Ω (around n=200, the influence of the value of n is small).Next, Assuming that the resistance value increases by 10%, r
R using 1.1 rk (k-1-, k) instead of k
Fig. 5 shows the change over time of 6. That is, when the resistance value of the extruded resistor increases by 10%, the inter-core resistance increases by 2% with a delay of 5 to 6 minutes. (Pick-up speed 5m/
min case).
［発明の効果］
以上説明したように本発明によれば、連続作業中の心線
間抵抗を監視することにより、押出し抵抗体の抵抗値を
推定することができる。従って、押出し温度及び心線予
熱温度のコントロールにフィードバックすることが可能
となる。これにより、有機ＰＴＣヒータの性能の安定及
び歩留りの向上に大きく寄与することができる。[Effects of the Invention] As described above, according to the present invention, the resistance value of the extruded resistor can be estimated by monitoring the resistance between the core wires during continuous operation. Therefore, it becomes possible to feed back the control of the extrusion temperature and the core preheating temperature. This can greatly contribute to stabilizing the performance and improving yield of the organic PTC heater.
第１図は本発明の一実施例を模式的に示す説明図、第２
図は有機ＰＴＣヒータを側面から見た断面図、第３図は
押出機の手前から見た心線間の等価回路を示す説明図、
第４図は室温時の心線間抵抗を計算するためのグラフ、
第５図は抵抗値の経時変化を示すグラフである。
１１：押 出 機、 １２：クロスヘッド、１３：心
線、 １４：心線ボビン、１５ ：ＰＴＣヒータ
、 １６：抵抗測定器、１７：コンピュータ、 １８
：記 録 計、２１：心線（撚線）、 ２２：抵 抗
体、２３：絶 縁 体。FIG. 1 is an explanatory diagram schematically showing one embodiment of the present invention, and FIG.
The figure is a sectional view of the organic PTC heater seen from the side, and Figure 3 is an explanatory diagram showing the equivalent circuit between the core wires seen from the front of the extruder.
Figure 4 is a graph for calculating the resistance between cores at room temperature.
FIG. 5 is a graph showing the change in resistance value over time. 11: Extruder, 12: Crosshead, 13: Core wire, 14: Core wire bobbin, 15: PTC heater, 16: Resistance measuring device, 17: Computer, 18
: Recorder, 21: Core wire (stranded wire), 22: Resistor, 23: Insulator.
Claims (1)
フィンを押出し被覆して有機ＰＴＣヒータを製造する方
法において、押出機のクロスヘッド内の心金部を一対の
電極線が通過する際に電極線間が電気的に絶縁されるよ
う心口金を構成し、電極線間の電気抵抗を連続的に測定
、記録することによって押出し抵抗体の抵抗値を監視、
コントロールすることを特徴とする有機ＰＴＣヒータの
製造方法。(1) In a method of manufacturing an organic PTC heater by extrusion coating a pair of electrode wires with polyolefin mixed with a conductivity imparting agent, when a pair of electrode wires passes through a core metal part in the crosshead of an extruder, The core cap is configured so that the electrode wires are electrically insulated, and the resistance value of the extruded resistor is monitored by continuously measuring and recording the electrical resistance between the electrode wires.
A method for manufacturing an organic PTC heater characterized by controlling.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62129486A JP2560725B2 (en) | 1987-05-26 | 1987-05-26 | Method for producing organic PTC heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62129486A JP2560725B2 (en) | 1987-05-26 | 1987-05-26 | Method for producing organic PTC heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63292592A true JPS63292592A (en) | 1988-11-29 |
| JP2560725B2 JP2560725B2 (en) | 1996-12-04 |
Family
ID=15010669
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62129486A Expired - Lifetime JP2560725B2 (en) | 1987-05-26 | 1987-05-26 | Method for producing organic PTC heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2560725B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997039461A1 (en) * | 1996-04-12 | 1997-10-23 | Littelfuse, Inc. | Manufacturing methods for positive temperature coefficient materials |
| WO2000019455A1 (en) * | 1998-09-25 | 2000-04-06 | Bourns, Inc. | Two-step process for preparing positive temperature coefficient polymer materials |
| CN104619057A (en) * | 2014-12-18 | 2015-05-13 | 博太科防爆设备（上海）有限公司 | Technological production method for blast-proof single-core constant-power heat tracing cable with high extrusion strength resistance |
-
1987
- 1987-05-26 JP JP62129486A patent/JP2560725B2/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO1997039461A1 (en) * | 1996-04-12 | 1997-10-23 | Littelfuse, Inc. | Manufacturing methods for positive temperature coefficient materials |
| US5814264A (en) * | 1996-04-12 | 1998-09-29 | Littelfuse, Inc. | Continuous manufacturing methods for positive temperature coefficient materials |
| WO2000019455A1 (en) * | 1998-09-25 | 2000-04-06 | Bourns, Inc. | Two-step process for preparing positive temperature coefficient polymer materials |
| JP2002526911A (en) * | 1998-09-25 | 2002-08-20 | ブアンズ・インコーポレイテッド | A two-stage method for producing positive temperature coefficient polymeric materials |
| CN104619057A (en) * | 2014-12-18 | 2015-05-13 | 博太科防爆设备（上海）有限公司 | Technological production method for blast-proof single-core constant-power heat tracing cable with high extrusion strength resistance |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2560725B2 (en) | 1996-12-04 |
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