JPS58214220A - Method of controlling coating thickness of cable - Google Patents
Method of controlling coating thickness of cableInfo
- Publication number
- JPS58214220A JPS58214220A JP9650082A JP9650082A JPS58214220A JP S58214220 A JPS58214220 A JP S58214220A JP 9650082 A JP9650082 A JP 9650082A JP 9650082 A JP9650082 A JP 9650082A JP S58214220 A JPS58214220 A JP S58214220A
- Authority
- JP
- Japan
- Prior art keywords
- coating thickness
- cable
- coating
- ratio
- measuring device
- 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.)
- Pending
Links
- 239000011248 coating agent Substances 0.000 title claims description 64
- 238000000576 coating method Methods 0.000 title claims description 64
- 238000000034 method Methods 0.000 title claims description 4
- 238000001125 extrusion Methods 0.000 claims description 15
- 238000005259 measurement Methods 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000000498 cooling water Substances 0.000 description 3
- 238000009675 coating thickness measurement Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000003795 chemical substances by application Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 230000003746 surface roughness Effects 0.000 description 1
- 229920003002 synthetic resin Polymers 0.000 description 1
- 239000000057 synthetic resin Substances 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 125000000391 vinyl group Chemical group [H]C([*])=C([H])[H] 0.000 description 1
- 229920002554 vinyl polymer Polymers 0.000 description 1
Landscapes
- Processes Specially Adapted For Manufacturing Cables (AREA)
Abstract
(57)【要約】本公報は電子出願前の出願データであるた
め要約のデータは記録されません。(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.
Description
【発明の詳細な説明】
従来よりケーブルを製造するにあたりその被覆を合成樹
脂押出しで形赳することが行なわれており、芯線はビニ
ル、ポリエチレン等の熱可塑性樹脂が加熱軟化されてい
る押出機に導入され、樹脂と共に冷却水槽中に押出され
て樹脂を被覆されている。この被覆は連続的に行なわれ
ており被覆惇を一定に制御するために被覆厚に常時測定
さｊ′シている。[Detailed description of the invention] Conventionally, when manufacturing cables, the sheathing has been formed by extruding synthetic resin, and the core wire is formed by extruding thermoplastic resin such as vinyl or polyethylene into an extruder that is heated and softened. It is then extruded with resin into a cooling water tank and coated with resin. This coating is carried out continuously, and the coating thickness is constantly measured in order to keep the coating constant.
ところで従来この被覆厚の測定には超音波が良く用いら
れている。これは超音波センサーをケーブルに近接して
設置し、ケーブルに感音：反を発射してその表面の反射
波（第１次エコー）および被覆内面（芯線表面ラの反射
波（第２次エコー）を発生させ、こ／Ｌを検知してその
時間差に被覆の材質に特有な超音波伝播速度を乗じ、１
／２ して被覆厚を求めるものである。非常に部属かつ
精度変く被覆厚を測定できる方法であるが、雑感音波の
伝播速度が温度によって変るため、被覆の湿度が正確に
判らないときは正しい値が得ら；ｔｔない。そのだめ押
出し直後のケーブルの被覆厚を求めそつ被覆厚に基づい
て直ちに押出ラインの制御をする時間遅れの小さい制御
ができない欠点がめった。Incidentally, conventionally, ultrasonic waves are often used to measure the coating thickness. This is done by installing an ultrasonic sensor close to the cable and emitting an acoustic wave to the cable to generate reflected waves from its surface (primary echo) and reflected waves from the inner surface of the coating (core wire surface roughness (secondary echo). ), detect this/L, and multiply the time difference by the ultrasonic propagation velocity specific to the material of the coating, and calculate 1.
/2 to find the coating thickness. Although this is a method that can measure the coating thickness with a very specific and variable accuracy, it is difficult to obtain the correct value if the humidity of the coating is not accurately known because the propagation speed of noise waves changes depending on the temperature. However, this method often has the disadvantage that it is not possible to determine the coating thickness of the cable immediately after extrusion and immediately control the extrusion line based on the coating thickness with a small time delay.
本発明はかかる難点に鑑みなされたもので、その特徴と
するところは、ケーブルの押出ラインを制御するにあた
り、これに用いる被覆厚を、ケーブルの同一被覆を押出
Ｊ直後の第１のＩ′た置とケーブルが充分冷えて一定温
度となる第２の位置とで測定し、この第２の位置での測
定値を第１の位置での測定値で除した被覆厚の比を求め
、押出されて来るケーブルの第１の位置での測定値に乗
じて求のることにある。The present invention was made in view of these difficulties, and its feature is that when controlling the cable extrusion line, the coating thickness used in the cable extrusion line can be changed by changing the coating thickness used in the cable extrusion line from the first I' immediately after extruding the same cable coating. Measurements are taken at the first position and at a second position where the cable has cooled sufficiently to a constant temperature, and the ratio of the coating thickness is calculated by dividing the measured value at this second position by the measured value at the first position. The purpose is to multiply the measured value at the first position of the cable to find it.
以下本発明を図面に基づき実施例につき詳述する。Hereinafter, the present invention will be described in detail with reference to the drawings.
第１図は本発明に用いられる超音波測定器１．２の配置
を示したもので、押出・幾３の押出し測置２．７≧の位
置（以下第１の位置と称す）と、これから離れた位置（
以下第２の位置と称す）とに設けらで、る。この第２の
位置は押出機３から押出されたケーブル４が充分に冷え
一定温度となる位置である。例えば冷却水槽のケーブル
出口近くとか引取→の近くなどがあり、ケーブルはそれ
ぞれ冷却水温、室温の一定温度となる。Figure 1 shows the arrangement of the ultrasonic measuring device 1.2 used in the present invention, including the extrusion measurement position 2.7≧ of extrusion measurement 3 (hereinafter referred to as the first position), and the remote location (
(hereinafter referred to as the second position). This second position is a position where the cable 4 extruded from the extruder 3 is sufficiently cooled to a constant temperature. For example, there are locations near the cable exit of the cooling water tank or near the take-off point, where the cables are at a constant temperature of cooling water and room temperature, respectively.
超音波測定器１．２は通常複数の超音波セッサーを有し
、例えば４個の超音波センサーをケーブルの上下、左右
に位置させてそれぞれケーブルの上下、左右の４箇所の
被覆厚を測定する。The ultrasonic measuring device 1.2 usually has a plurality of ultrasonic sensors, for example, four ultrasonic sensors are placed on the top, bottom, left and right of the cable to measure the coating thickness at four locations on the top, bottom, left and right of the cable, respectively. .
第１の位置に位置されるケーブル４の被粉は押出された
直後の熱い状態で温度が変化し、これを正確に求めるの
は難しく超音波伝播速度を正確に出せないので被覆厚は
正しく ９．１１定されない。この場合被覆厚は、押出
し直後の被覆がとり得るある一定の温度での超音波伝播
速度を用いて求められ、真の被覆厚の相対値となる。第
２の位置では被覆が充分に冷えて一定温度となっている
ので超音波伝播速度は正碑な値ｒ使え、′ｆｊ、覆厚は
正確に画定される。The temperature of the powder coating on the cable 4 located at the first position changes in the hot state immediately after being extruded, and it is difficult to accurately determine this temperature, and the ultrasonic propagation velocity cannot be accurately determined, so the coating thickness is correct. 9 .11 Not determined. In this case, the coating thickness is determined using the ultrasonic propagation velocity at a certain temperature that the coating can assume immediately after extrusion, and is a relative value of the true coating thickness. In the second position, the coating is sufficiently cooled and at a constant temperature, so that the ultrasonic propagation velocity can be set to the correct value r, and the coating thickness 'fj and coating thickness can be accurately defined.
本発明に２いては、この第１、第２の位置で測定器１．
２により押出されて来るケーブル４の被覆を適宜な時間
間隔で測定し、測定器１で測定された被覆が測定器２で
も測定でれるようにする。In the second aspect of the present invention, the measuring device 1.
The covering of the cable 4 extruded by the measuring device 2 is measured at appropriate time intervals so that the covering measured by the measuring device 1 can also be measured by the measuring device 2.
そして同一被覆の測定器２でのｊｔｉｌｌ定値を勿定器
１での測定値で除して被覆厚の比を求め、これをフィー
ドバックして押出されて第１の位置に位置される被覆の
測定器１による測定値に乗じて被覆厚を補正し、この補
正された被覆厚に基づいて引取機や押出機などの製造ラ
インを調整し押出されて来るケーブルの被覆厚を制御す
るようにする。Then, the constant jtill value measured by measuring device 2 for the same coating is divided by the measured value by measuring device 1 to obtain the coating thickness ratio, and this is fed back to measure the coating that is extruded and positioned at the first position. The coating thickness is corrected by multiplying the measured value by the device 1, and the production line such as a pulling machine and an extruder is adjusted based on the corrected coating thickness to control the coating thickness of the extruded cable.
今、第１の位置に位置したケーブルの被覆の測定器ｊに
よる測定値を第２図に示すようにＶｉとすると、との■
１は真の被覆厚の相対ｆ直と−１っている。ケーブルは
走行して一定時間後に同一被覆が第２の位置に位置し、
測定器２によシ測定される。この測定値は真の被覆厚と
なっている。こわ５をＶｉ’とする。Now, if the measurement value of the cable sheath located at the first position by the measuring device j is denoted by Vi as shown in Fig. 2, then
1 is -1 relative to the true coating thickness. The cable travels and after a certain period of time the same sheathing is located in a second position,
It is measured by the measuring device 2. This measured value is the true coating thickness. Let the stiffness 5 be Vi'.
先の測定値■１をメモリ５によってｈ間を遅らせ同期し
て供給し、測定値■ｌ′を測定値Ｖｉで除算器６により
除して被覆厚の比ξＩを求≧）る。そしてこの比ξｌを
Ｖ【′が測定されたとき、あるいはそれ以後に第１の位
置に位置される被覆の測定器１による測定値（Ｖｉ＋ｎ
とする）に乗算器７により乗じて補正し、補正した被”
Ｊ 厚（■ｌ“十〇とする）を得る。この被覆厚の比ξ
Ｉは測定値ｖ１、■ｌ′の対象となる被覆についての関
係で、厳密にはケーブルの走行方向位置一般の被覆につ
いて変動し得るが、そう大きく変らないので、この比ξ
」を乗じて補正した被覆厚Ｖｉ“ヤｎは真の破援１早・
、ζ近くなる。この補正された被覆ｆｌＶｉ”＋ｎに基
づいて制御出力を発生し、引取機や押出機などのケーブ
ルの押出しラインを制御する。The previous measured value (1) is supplied to the memory 5 in synchronization with a delay of h, and the measured value (1) is divided by the measured value Vi by the divider 6 to find the coating thickness ratio ξI (≧). Then, this ratio ξl is determined by the measuring device 1 of the coating located at the first position when V[' is measured or thereafter (Vi+n
) is multiplied by multiplier 7 and corrected, and the corrected target is
Obtain the J thickness (■l is assumed to be 10).The ratio of this coating thickness ξ
I is the relationship between the measured values v1 and ■l' for the sheathing, and strictly speaking it may vary with the sheathing in general at the position in the running direction of the cable, but since it does not change that much, this ratio ξ
The coating thickness corrected by multiplying the
, ζ becomes close. A control output is generated based on the corrected coating flVi''+n to control a cable extrusion line such as a pulling machine or an extruder.
第１の位置、第２の位置では測定器１．２でケーブルの
被覆を連硯附に測定する。そして同様にして同一被覆の
第１の位置での測定１直Ｖｉ＋、、Ｖｉ＋２、・・と第
２の位置での測定値ｖｉ＋、’、ｖｉａ２’、・・・と
刀・ら被覆厚の比ξｉ＋１、ξｉ＋２、・・ を求の、
これをフィードバックして第１の位置での測定頭Ｖｉ＋
ｎ＋ １、Ｖｉ＋ｎ−）、、、・・に’ｉＡ ｒ乗じて
補正した被覆厚Ｖｉ−）ｎ＋、”、Ｖｉ＋’ｎ＋２”、
・・を求め、この補正した被覆厚に基づいて押出ライン
に連続的に制御を加える。In the first and second positions, the measuring device 1.2 continuously measures the cable sheathing. Similarly, the ratio of the measurement value vi+, ', via2',... of the same coating at the first position to the measurement value vi+, ', via2',... and the thickness of the sword/ra coating. Find ξi+1, ξi+2,...
Feedback this and measure the head Vi+ at the first position.
Coating thickness corrected by multiplying n+ 1, Vi+n-), ... by 'iAr r', Vi-)n+,", Vi+'n+2",
... is determined, and the extrusion line is continuously controlled based on this corrected coating thickness.
このように押出機３直後の第１の位置で６１定した被覆
厚を補正して製造ラインの制御に用いるようにしている
ので、時間遅れを小さくした制御が可能となる。In this way, since the coating thickness fixed at the first position immediately after the extruder 3 is corrected and used for controlling the production line, control with reduced time delay is possible.
以上の説明から′も明らかなように、本発明においては
、押出機の押出し測置後の第１の位置と押出されたケー
ブルが充分に冷えて一定現度となる第２の位置とに超音
波測定器を設けてケーブルの同一箇所の被覆厚を測定し
、これから同一被覆についての第２の位置での測定値を
第１の位置での測定値で除した被覆厚の比を求め、この
被覆厚の比を押出されて来るケーブル・つ第１の位置で
の被覆厚の測定値に乗じて被覆厚を補正し、この補正さ
ｎた被覆厚に基づいて押出しラインを調整し押出される
ケーブルの被覆厚を制御するようにしているので、時間
・卒牡を小さくした制御ができ、正常に被覆されたケー
ブルの製造が可能となる。As is clear from the above explanation, in the present invention, the extruder is able to move beyond the first position after extrusion measurement and the second position where the extruded cable has sufficiently cooled and has a constant temperature. A sonic measuring device is installed to measure the coating thickness at the same location on the cable, and from this the ratio of the coating thickness is calculated by dividing the measurement value at the second location by the measurement value at the first location for the same coating. The coating thickness is corrected by multiplying the coating thickness ratio by the measurement value of the coating thickness at the first position of the cable to be extruded, and the extrusion line is adjusted based on this corrected coating thickness. Since the coating thickness of the cable is controlled, it is possible to control the time and shrinkage to a minimum, and it is possible to manufacture a properly coated cable.
第１図は本発明を実施するための超音波測定器の配置を
示す配置図、第２図は本発明での被覆厚の補正のし方を
説明するだめのブロック図である。
１．２・・・・・超音波測定器
３ ・・・・・・押出機
４ ・・ ケーブル
５ ・・・・・・・・・メモリ
６ ・・・・・・・・・除算器
７ ・・・・・・・・乗算器
■１ ・・・・・・・・第１の位置での被覆厚測定値
Ｖｉ’、・・・・・・・・第２の、位置での被覆厚測定
値Ｖｉ″−１−ｎ ・・・第１の位置での測定値を補
正した被覆厚
ξｌ ・・・・・・・被覆厚の比
代理人 弁理士 守 谷 −雄FIG. 1 is a layout diagram showing the arrangement of ultrasonic measuring instruments for implementing the present invention, and FIG. 2 is a block diagram for explaining how to correct the coating thickness in the present invention. 1.2... Ultrasonic measuring device 3... Extruder 4... Cable 5... Memory 6...... Divider 7. ...... Multiplier ■1 ...... Coating thickness measurement value Vi' at the first position, ...... Coating thickness measurement at the second position Value Vi''-1-n ... Coating thickness ξl corrected from the measured value at the first position ...... Specific agent for coating thickness Patent attorney Moritani - Yu
Claims (1)
ルが充分に冷えて一定温度となる第２の位置とに超音波
測定器を設けてケーブルの同一箇所の被覆厚を測定し、
これから同一被覆についての第２の位置での測定値を第
１の位置での測定値で除した被覆厚の比を求め、この被
覆厚の比を押出されて来るケーブルの第１の位置での被
覆厚の測定値に乗じて被覆厚を補正し、この補正された
被覆厚に基づいて押出しラインを調整し押出されるケー
ブルの被覆厚を制御することを′￥ｊ徴とするケーブル
の被覆厚の制御方法。An ultrasonic measuring device is installed at a first position immediately after the extrusion side of the extrusion limit and at a second position where the extruded cable is sufficiently cooled and reaches a constant temperature, and the coating thickness of the same part of the cable is measured,
From this, the ratio of the coating thickness is calculated by dividing the measurement value at the second position by the measurement value at the first position for the same coating, and this ratio of coating thickness is calculated as the ratio of the coating thickness at the first position of the extruded cable. The coating thickness of the cable is characterized by correcting the coating thickness by multiplying it by the measured value of the coating thickness, and adjusting the extrusion line based on this corrected coating thickness to control the coating thickness of the extruded cable. control method.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9650082A JPS58214220A (en) | 1982-06-04 | 1982-06-04 | Method of controlling coating thickness of cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP9650082A JPS58214220A (en) | 1982-06-04 | 1982-06-04 | Method of controlling coating thickness of cable |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPS58214220A true JPS58214220A (en) | 1983-12-13 |
Family
ID=14166816
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP9650082A Pending JPS58214220A (en) | 1982-06-04 | 1982-06-04 | Method of controlling coating thickness of cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS58214220A (en) |
-
1982
- 1982-06-04 JP JP9650082A patent/JPS58214220A/en active Pending
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