JP2560725B2 - Method for producing organic PTC heater - Google Patents
Method for producing organic PTC heaterInfo
- Publication number
- JP2560725B2 JP2560725B2 JP62129486A JP12948687A JP2560725B2 JP 2560725 B2 JP2560725 B2 JP 2560725B2 JP 62129486 A JP62129486 A JP 62129486A JP 12948687 A JP12948687 A JP 12948687A JP 2560725 B2 JP2560725 B2 JP 2560725B2
- Authority
- JP
- Japan
- Prior art keywords
- ptc heater
- resistance value
- organic ptc
- resistor
- electrode wires
- 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
Landscapes
- Resistance Heating (AREA)
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。The present invention relates to a method for 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。[Problems to be Solved by Prior Art and Invention] Generally, the resistance value of an organic PTC heater is greatly influenced by the core wire preheating temperature and the resistor extruding temperature at the time of extruding the resistor. Thus, 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. At the time of cutting, there is no choice but to take a sample, measure the resistance value, and feed it back, so that there is a large time lag and the yield is extremely poor.
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 of actually measuring the resistance between rollers by sandwiching a resistor between metal rollers has been proposed, but the resistance value of the surface layer often differs greatly from the internal resistance value, and a reliable value cannot be obtained by this method. 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 such circumstances,
It is an object of the invention to provide a method for producing an organic PTC heater having stable performance by continuously measuring the resistance value of a resistor during an extrusion operation.
［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
縁されるように心口金を構成し、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 producing an organic PTC heater by extrusion-coating a pair of electrode wires with a polyolefin mixed with a conductivity-imparting agent. An extrusion resistor is constructed by configuring the core so that the electrode wires are electrically insulated when a pair of electrode wires passes through the core, and continuously measuring and recording the electrical resistance between the electrode wires. Organic PT characterized by monitoring and controlling the resistance value of
It is in the manufacturing method of the C heater.
［実施例］ 以下、本発明を図面により説明する。EXAMPLES The present invention will be described below 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2
1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 sectional view of the organic PTC heater. 2 in the figure
1 is a core wire (stranded wire), 22 is a resistor, and 23 is an insulator. The feature of the present invention resides in the continuous measurement of the resistance value of the heater when the resistor is extruded as described above, but the pair of core wires 13 from the core bobbin 14 is crossed by the extruder 11 as shown in FIG. Be prepared to be electrically insulated when passing through the core die (not shown) in the head 12, and the core wire in front of the cross head 12.
The electrical resistance between 13 and 13 is continuously measured by the resistance measuring device 16, calculated by the computer 17, and recorded by the 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R0
は 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。FIG. 3 shows an equivalent circuit between the core wires 13 and 13 as seen from the front of the extruder 11. From this equivalent circuit, the resistance value between core wires 13 and 13 R 0
Is Is required. ik can be obtained by solving the following simultaneous equations.
（2R1＋r1）i1＋2R1 i2 ＋2R1i3＋ …＝Ｖ −r1i1＋（2R2＋r2）i2 2R2i3＋2R2i4＋ …＝０ 低抗体の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、低抗体の表
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ｒ∝を連続的に推定することが可
能である。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。 (2R 1 + r 1) i 1 + 2R 1 i 2 + 2R 1 i 3 + ... = V -r 1 i 1 + (2R 2 + r 2) i 2 2R 2 i 3 + 2R 2 i 4 + ... = 0 The low antibody rk has a very high temperature dependence, but when the composition of the resistors is the same, the temperature coefficient f (T) of the resistance value is constant and can be known in advance. Therefore, by continuously measuring the surface temperature of the low antibody, it is possible to continuously estimate the resistance value r∝ when the resistor reaches room temperature. Of course, this calculation requires the help of a personal computer or the like.
ここで一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 is an example of one trial calculation. FIG. 4 shows a graph for calculating the resistance between cores at room temperature. If this is divided into 1 m intervals in the length direction, the equivalent circuit of Fig. 3
rk and Rk are as follows.
ｋ＜30のとき rk＝150×ｅ0.3212×（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R0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、rk
の代りに1.1rk（ｋ＝１…,k）を用いてR0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 <30 rk = 150 × e 0.3212 × (31−k) (Ω / m) When k ≧ 30 Rk = 0.2 (Ω / m) rk = 150 (Ω / m) (3) As n = 200, formula (3) Then, R 0 is calculated by substituting in the equation (2) and becomes 13.04 Ω (the influence of the value of n is small in the vicinity of n = 200.) Next, assuming that the resistance value of the resistor increases by 10%, rk
Fig. 5 shows changes in R 0 with time using 1.1rk (k = 1 ..., k) instead of. That is, if the resistance value of the push-out resistor increases by 10%, the inter-core resistance increases by 2% with a delay of 5 to 6 minutes. (When the take-up speed is 5 m / min).
［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 push-out resistor can be estimated by monitoring the resistance between core wires during continuous work. Therefore, it becomes possible to feed back to the control of the extrusion temperature and the core wire preheating temperature. As a result, it is possible to greatly contribute to the stable performance of the organic PTC heater and the improvement of the yield.
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 view schematically showing an embodiment of the present invention, and FIG.
Figure is a cross-sectional view of the organic PTC heater seen from the side, Figure 3 is an explanatory diagram showing the equivalent circuit between the core wires seen from the front of the extruder, and Figure 4 is for calculating the resistance between core wires at room temperature. FIG. 5 is a graph showing the change with time of the resistance value. 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)
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PTCヒータ
の製造方法。1. A method of manufacturing an organic PTC heater by extrusion-coating a polyolefin mixed with a conductivity-imparting agent for a pair of electrode wires, wherein a pair of electrode wires pass through a cored bar in a crosshead of an extruder. At this time, the core wire is configured to electrically insulate the electrode wires, and the resistance value of the extrusion resistor is monitored and controlled by continuously measuring and recording the electric resistance between the electrode wires. Method for manufacturing organic PTC heater.
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 JPS63292592A (en) | 1988-11-29 |
| JP2560725B2 true 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) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5814264A (en) * | 1996-04-12 | 1998-09-29 | Littelfuse, Inc. | Continuous manufacturing methods for positive temperature coefficient materials |
| KR20010079908A (en) * | 1998-09-25 | 2001-08-22 | 추후보정 | Two-step process for preparing positive temperature coefficient polymer materials |
| CN104619057B (en) * | 2014-12-18 | 2016-08-24 | 博太科防爆设备（上海）有限公司 | The technique production method of the explosion-proof single invariable power accompanying-heat cable of anti-high crushing strength |
-
1987
- 1987-05-26 JP JP62129486A patent/JP2560725B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63292592A (en) | 1988-11-29 |
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