JP3744037B2 - Method and apparatus for applying powder release agent - Google Patents
Method and apparatus for applying powder release agent Download PDFInfo
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- JP3744037B2 JP3744037B2 JP28914495A JP28914495A JP3744037B2 JP 3744037 B2 JP3744037 B2 JP 3744037B2 JP 28914495 A JP28914495 A JP 28914495A JP 28914495 A JP28914495 A JP 28914495A JP 3744037 B2 JP3744037 B2 JP 3744037B2
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- release agent
- powder
- powder release
- electric wire
- coating apparatus
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- 239000000843 powder Substances 0.000 title claims description 86
- 239000003795 chemical substances by application Substances 0.000 title claims description 67
- 238000000034 method Methods 0.000 title description 7
- 238000000576 coating method Methods 0.000 claims description 21
- 239000011248 coating agent Substances 0.000 claims description 20
- 230000007246 mechanism Effects 0.000 claims description 12
- 238000003756 stirring Methods 0.000 claims description 11
- 239000000463 material Substances 0.000 claims description 6
- 239000002184 metal Substances 0.000 description 6
- 239000000853 adhesive Substances 0.000 description 5
- 230000001070 adhesive effect Effects 0.000 description 5
- 239000006082 mold release agent Substances 0.000 description 4
- FPAFDBFIGPHWGO-UHFFFAOYSA-N dioxosilane;oxomagnesium;hydrate Chemical compound O.[Mg]=O.[Mg]=O.[Mg]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O.O=[Si]=O FPAFDBFIGPHWGO-UHFFFAOYSA-N 0.000 description 3
- 239000000428 dust Substances 0.000 description 3
- 239000010445 mica Substances 0.000 description 3
- 229910052618 mica group Inorganic materials 0.000 description 3
- 230000005611 electricity Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 230000002265 prevention Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000005641 tunneling Effects 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 239000000088 plastic resin Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
Images
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- Application Of Or Painting With Fluid Materials (AREA)
- Manufacturing Of Electric Cables (AREA)
Description
【０００１】
【発明の属する技術分野】
本発明は、撚合わせコアー等の電線（ケーブル）上への外被の押出等電線の押出に必要な粉体離型剤塗布装置のような付帯装置及び粉体離型剤の塗布方法に関するものである。
より詳細には、本発明は、電線等の製造工程において、電線と外被層とのブリッジ（くっつき）を防止して剥離し易くするために、マイカ粉、タルク粉等の粉体離型剤を、走行する電線に付着させるための塗布方法及びその塗布装置に関する。
【０００２】
【従来の技術】
従来、電線と外被層とのブリッジ（くっつき）を防止して剥離し易くするために、電線上に粉体離型剤を塗布する装置に関しては図２に示される様な装置、即ち粉体離型剤を収納した容器Ａ内に、前後に振動するエアシリンダ３に懸架した複数個の攪拌羽根２設け、該攪拌羽根２内を通過する電線に粉体離型剤を付着させる装置、粉体離型剤に静電気をかけて電線に付着させる装置、粉体離型剤の空洞化を防止のためにスクリューを用いる方法などが知られている。
【０００３】
【発明が解決しようとする課題】
従来、この種の装置は図２に代表されるように、電線が粉体離型剤内を通過する時に該粉体離型剤によっては空洞化する問題があった。また、粉体離型剤の電線上への付着量を変化させることができず、更に電線と外被層との接着力をコントロールできない問題があった。
また、静電気による粉体離型剤の付着では、帯電し難い粉体離型剤は電線に付着し難く、またスクリュー方式による空洞化防止も粉体離型剤の形状・種類によっては空洞化をおこしてしまう問題があった。
【０００４】
【課題を解決するための手段】
本発明者は上記課題を種々検討した結果、粉体離型剤塗布装置に粉体離型剤を攪拌するための攪拌羽根と、上下動可能で且つ走行する電線に平行な棒状物からなる該粉体のブリッジ防止機構を備え、更に余分な粉体離型剤を取り除く機構を備えたことにより、電線の通過による粉体離型剤の空洞化を防止でき、且つ電線への粉体離型剤の付着量を所定値内に制御できることを見出し、本発明を完成するに至った。
すなわち、本発明は：
（１）電線の絶縁表面に粉体離型剤を塗布する装置において、該粉体を入れる容器を備え、容器に入った粉体中を電線が通過するように構成し、粉体離型剤を攪拌するための攪拌羽根と、上下動可能で且つ走行する電線に平行な棒状物からなる該粉体のブリッジ防止機構を備え、更に余分な粉体離型剤を取り除く機構を備えた粉体離型剤塗布装置を提供する。また、
（２）余分な粉体離型剤を取り除く機構が３点式ローラーによる点にも特徴を有する。また、
（３）余分な粉体離型剤を取り除く機構ががエアー式除粉機による点にも特徴を有する。
【０００６】
以下、図面に基いて本発明を詳細に説明する。
図１は、本発明の１つの実施態様を示す粉体離型剤塗布装置の概略を説明する模式図である。
図１において、１はバイブレーター、２は攪拌羽根、３はエアシリンダ、４は金属棒、５は３点式ローラ、６はエアー式除粉機、７は撚合わせコアー等の電線である。
例えば、図１に示すように、二本以上の撚合わせコアーを有するケーブル７に絶縁プラスチック樹脂からなる外被層を押出する工程において、上方が開放され粉体離型剤が収納された容器Ａ内に、(イ) 該粉体離型剤を分散状態を保持させるバイブレーター１を備える。
【０００７】
(ロ) 撚合わせコアー７の進行方向に設けた粉体離型剤を攪拌するための攪拌羽根２を固定し又は前後・左右に揺動させる。
(ハ) 一定間隔で上下運動し又は／及び撚合わせコアーの通過速度の変化に対応するために上下作動の間隔を可変とするエアシリンダ３とその先端部に設けた棒状物（金属棒）４により、撚合わせコアー７の走行路上を一定間隔で該金属棒で打解して該コアーに付着して運び去られた粉末のあとをその付近の粉体離型剤で補充して撚合わせコアー７上の粉体離型剤の空洞化発生を防止すると共に、撚合わせコアーと外被との接着力をコントロールして撚合わせコアーに粉体離型剤が十分に付着させる。
【０００８】
(ニ) 該撚合わせコアー７の走行路であって、好ましくは粉体離型剤塗布装置Ａ外に３点式ローラ５（５1 、５2 、５3 ）を設けて、該ロール間を通過する間に該複数個の撚合わせコアーの谷間部分への余分な粉体離型剤を取り除いて下方に落下させる。
(ホ) 該撚合わせコアー７の走行路であって、好ましくは粉体離型剤塗布装置Ａ外にエアー式除粉機６を固定して設け、風圧をコントロールすることにより粉体離型剤が撚合わせコアー表面に付着する量を調節できる。
上記 (ハ)〜 (ホ)の粉体離型剤のブリッジ防止機構は、それら単独の使用でもまたそれらを組合せて使用しても良い。
【０００９】
上記 (ハ)の上下する棒状物４は、走行する電線に平行してエアシリンダに固定して設ければよく、またその材質は金属のような硬質のものが好ましい。
(ニ)の３点式ローラとしては、撚合わせコアーの谷間部分への余分な粉体離型剤を取り除いて下方に落下させることができればローラの数については特に制限されないが、３個のローラを図示されるような配置でまとめることが望ましい。
(ホ)のエアー式除粉機６としては、所定の風圧でブローして撚合わせコアー表面に付着する量を調整できれば特にその構造は制限されないが、例えばテーパーの構造のものが望ましい。
【００１０】
【作用】
本発明者の種々の検討の結果、従来の粉体離型剤塗布装置においては、粉体離型剤中を撚合わせコアーが通過する際に、如何なる粉体離型剤でも空洞化（トンネル化）までの期間に差があるものの必ず発生することが明らかとなった。
また、撚合わせコアーの従来の粉体離型剤塗布装置内への通過速度にも左右され、高速になるほど短時間で空洞化が発生することも判った。
【００１１】
更に、撚合わせコアーへの粉体離型剤の付着量は、粉体の粒径、形状などにより或る程度コントロールできるが、実用上、ケーブルの押出し毎に交換するのは現実的でない対応であることも判った。
そこで、本発明は、粉体離型剤のブリッジの防止法としてエアシリンダを利用して撚合わせコアーの直上まで金属棒を一定間隔で上下させ、又は／及び撚合わせコアーの通過速度の変化に対応するために上下作動間隔を可変とすることが一層有効である。
また、本発明の粉体離型剤塗布装置により撚合わせコアーに粉体離型剤を十分に付着させるためには、更に、その後工程に又は／及び３点式ローラを設けて撚合わせコアーの谷間部分への余分な粉体離型剤を取り除き、又は／及びエアー式除粉機の風圧で余分な粉体離型剤を取り除くことが肝要である。
【００１２】
【実施例】
本発明を以下の実施例により具体的に説明するが、これは本発明の範囲を制限しない。
図１に示す本発明の粉体離型剤塗布装置を用い、材質ポリエチレン製の２．０ｍｍφの径の２個撚合わせコアーを該装置中に通過させる間に、所定の操作を行ってタルク粉、マイカ粉の粉体離型剤を該コアー上に一定量付着させた後に、該コアーの材質と同様の材質の外被を０．５ｍｍの厚さで押出して、該撚合わせコアーに被覆したケーブルを得た。
そこで、撚合わせコアーと外被との接着力を撚合わせコアーを３５ｍｍ引き抜く時の引抜力で評価し、且つトンネル発生等のブリッジ発生は、発生までの時間で評価した。
その結果を表１に示す。
【００１３】
【表１】
【００１４】
上記表１によると、粉体離型剤としてタルク粉、マイカ粉を用いた場合、引抜力が低く且つブリッジ発生までの時間も極めて短くて、本発明の粉体離型剤塗布装置は有効であることが確認された。
【００１５】
【発明の効果】
以上述べたように、撚合わせコアーのような電線上に外被を押出するケーブルについて、撚合わせコアーと外被との接着力を粉体離型剤を使用して任意の値にコントロールすることが従来の粉体離型剤塗布装置では不可能であったが、本発明による粉体離型剤塗布装置を使用することで可能となった。
また、粉体離型剤の塗布中に電線の通過で粉体離型剤が空洞化（ブリッジ化）を起こす問題があったが、本発明の粉体離型剤塗布装置では、長時間空洞化を防止でき、安定した生産が可能となった。
本発明による粉体離型剤塗布装置はケーブルの加工方法、加工長が異なる場合に必要となる適切な電線と外被との接着力をコントロールしたい時に利用すると効果的である。
【図面の簡単な説明】
【図１】本発明の１つの実施態様である粉体離型剤塗布装置の構造を示す模式図である。
【図２】従来の粉体離型剤塗布装置の構造を示す模式図である。
【符号の説明】
１ バイブレーター
２ 攪拌羽根
３ エアシリンダ
４ 金属棒
５ ３点式ローラ
６ エアー式除粉機
７ 電線（撚合わせコアー）[0001]
BACKGROUND OF THE INVENTION
TECHNICAL FIELD The present invention relates to an accessory device such as a powder release agent coating apparatus required for extrusion of an electric wire such as an outer sheath extrusion onto an electric wire (cable) such as a twisted core, and a method for applying the powder release agent. It is.
More specifically, the present invention relates to a powder mold release agent such as mica powder or talc powder in order to prevent the bridge between the electric wire and the covering layer and make it easy to peel in the manufacturing process of the electric wire or the like. The present invention relates to a coating method and a coating apparatus for adhering a wire to a traveling electric wire.
[0002]
[Prior art]
2. Description of the Related Art Conventionally, with respect to an apparatus for applying a powder releasing agent on an electric wire in order to prevent the bridge (sticking) between the electric wire and the jacket layer and to facilitate peeling, an apparatus as shown in FIG. In a container A containing a release agent, a plurality of stirring
[0003]
[Problems to be solved by the invention]
2. Description of the Related Art Conventionally, as shown in FIG. 2, this type of apparatus has a problem in that when the electric wire passes through the powder release agent, the powder release agent cavitates. In addition, there is a problem that the amount of the powder release agent adhering to the electric wire cannot be changed, and the adhesive force between the electric wire and the covering layer cannot be controlled.
In addition, when the powder release agent is attached by static electricity, it is difficult for the powder release agent that is difficult to be charged to adhere to the electric wire. In addition, the screw method prevents cavitation depending on the shape and type of the powder release agent. There was a problem that caused it.
[0004]
[Means for Solving the Problems]
As a result of various studies on the above problems, the present inventor has found that the powder release agent coating apparatus comprises a stirring blade for stirring the powder release agent, and a rod- like object that can move up and down and is parallel to the traveling wire. comprising a bridge prevention mechanism of the powder, by further including a mechanism for removing the excess powder mold releasing agent can prevent cavitation of the powder mold releasing agent due to the passage of the wire, and powder releasability to the wire The present inventors have found that the adhesion amount of the agent can be controlled within a predetermined value, and have completed the present invention.
That is, the present invention provides:
(1) In an apparatus for applying a powder release agent to the insulating surface of an electric wire, the apparatus includes a container for storing the powder, the electric wire passes through the powder in the container, and the powder release agent A powder equipped with a stirring blade for stirring the powder, a bridge prevention mechanism for the powder made of a rod- like material that is movable up and down and parallel to the traveling wire, and a mechanism for removing excess powder release agent A release agent coating apparatus is provided. Also,
(2) The mechanism for removing excess powder release agent is also characterized by a three-point roller. Also,
(3) The mechanism for removing excess powder release agent is also characterized by the use of an air type powder remover.
[0006]
Hereinafter, the present invention will be described in detail with reference to the drawings.
FIG. 1 is a schematic view for explaining the outline of a powder release agent coating apparatus showing one embodiment of the present invention.
In FIG. 1, 1 is a vibrator, 2 is a stirring blade, 3 is an air cylinder, 4 is a metal rod, 5 is a three-point roller, 6 is an air-type dust remover, and 7 is an electric wire such as a twisted core.
For example, as shown in FIG. 1, in the process of extruding a jacket layer made of an insulating plastic resin on a cable 7 having two or more twisted cores, a container A in which the upper part is opened and a powder release agent is stored. Inside, (i) a vibrator 1 for keeping the powder release agent in a dispersed state is provided.
[0007]
(B) The stirring
(C) An
[0008]
(D) A three-point roller 5 (5 1 , 5 2 , 5 3 ) provided on the traveling path of the twisted core 7, preferably outside the powder release agent coating apparatus A, and between the rolls While passing, the excess powder release agent to the valley portions of the plurality of twisted cores is removed and dropped downward.
(E) A powder release agent which is a traveling path of the twisted core 7 and is preferably provided outside the powder release agent coating apparatus A by fixing an air type powder remover 6 and controlling the wind pressure. Can be adjusted to adhere to the surface of the twisted core.
The above-mentioned anti-bridging mechanisms for the powder release agents (c) to (e) may be used alone or in combination.
[0009]
The rod-like object 4 that moves up and down in the above (c) may be fixed to the air cylinder in parallel with the traveling electric wire, and the material is preferably a hard material such as metal.
The number of rollers is not particularly limited as long as the three-point roller of (d) can be removed downward by removing excess powder release agent to the valley portion of the twisted core, but the three rollers Are preferably arranged in the arrangement as shown.
As the air type dust remover 6 of (e), the structure is not particularly limited as long as it can adjust the amount that blows at a predetermined wind pressure and adheres to the surface of the twisted core, but for example, a taper structure is desirable.
[0010]
[Action]
As a result of various studies by the present inventor, in the conventional powder release agent coating apparatus, any powder release agent is hollowed (tunneled) when the twisted core passes through the powder release agent. It has become clear that it always occurs, though there is a difference in the period until.
It was also found that cavitation occurred in a shorter time as the speed increased, depending on the passing speed of the twisted core into the conventional powder release agent coating apparatus.
[0011]
Furthermore, the amount of the powder release agent attached to the twisted core can be controlled to some extent by the particle size and shape of the powder, but in practice it is not practical to replace it every time the cable is extruded. I also found it.
Therefore, the present invention uses an air cylinder as a method for preventing the bridging of the powder release agent, and moves the metal rod up and down at a certain interval to just above the twisted core or / and changes in the passing speed of the twisted core. In order to cope with this, it is more effective to make the vertical operation interval variable.
Further, in order to sufficiently attach the powder release agent to the twisted core by the powder release agent coating apparatus of the present invention, further, or / and a three-point roller is provided in the subsequent process to provide a twisted core. It is important to remove the excess powder release agent in the valleys and / or remove the excess powder release agent with the wind pressure of the air type dust remover.
[0012]
【Example】
The present invention is illustrated in detail by the following examples, which do not limit the scope of the invention.
Using the powder release agent coating apparatus of the present invention shown in FIG. 1, while passing two twisted cores made of polyethylene material having a diameter of 2.0 mmφ through the apparatus, a predetermined operation is performed to perform talc powder. After a certain amount of mica powder mold release agent was deposited on the core, the outer shell of the same material as that of the core was extruded to a thickness of 0.5 mm to coat the twisted core. Got the cable.
Therefore, the adhesive force between the twisted core and the jacket was evaluated by the pulling force when the twisted core was pulled out by 35 mm, and the occurrence of bridges such as tunneling was evaluated by the time until the occurrence.
The results are shown in Table 1.
[0013]
[Table 1]
[0014]
According to Table 1 above, when talc powder and mica powder are used as the powder release agent, the pulling force is low and the time until the occurrence of the bridge is extremely short, and the powder release agent coating apparatus of the present invention is effective. It was confirmed that there was.
[0015]
【The invention's effect】
As described above, for cables that extrude the jacket over the wire, such as a twisted core, the adhesive strength between the twisted core and the jacket must be controlled to an arbitrary value using a powder release agent. However, it was not possible with the conventional powder release agent coating apparatus, but it became possible by using the powder release agent coating apparatus according to the present invention.
In addition, there was a problem that the powder release agent was hollowed (bridged) by the passage of the electric wire during the application of the powder release agent. Can be prevented, and stable production has become possible.
The powder release agent coating apparatus according to the present invention is effective when it is desired to control the adhesive force between an appropriate electric wire and a jacket that is required when the cable processing method and processing length are different.
[Brief description of the drawings]
FIG. 1 is a schematic view showing the structure of a powder release agent coating apparatus which is one embodiment of the present invention.
FIG. 2 is a schematic view showing the structure of a conventional powder release agent coating apparatus.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1
Claims (3)
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28914495A JP3744037B2 (en) | 1995-10-12 | 1995-10-12 | Method and apparatus for applying powder release agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28914495A JP3744037B2 (en) | 1995-10-12 | 1995-10-12 | Method and apparatus for applying powder release agent |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH09106722A JPH09106722A (en) | 1997-04-22 |
| JP3744037B2 true JP3744037B2 (en) | 2006-02-08 |
Family
ID=17739333
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28914495A Expired - Lifetime JP3744037B2 (en) | 1995-10-12 | 1995-10-12 | Method and apparatus for applying powder release agent |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3744037B2 (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007213846A (en) * | 2006-02-07 | 2007-08-23 | Fuji Densen Kogyo Kk | Mold release agent application device and mold release agent application method |
| JP2015120855A (en) * | 2013-12-25 | 2015-07-02 | 株式会社キョーワ | Electric wire water soluble release agent and method for manufacturing electric wire using the same |
| CN209401371U (en) * | 2018-10-31 | 2019-09-17 | 罗伯特·博世有限公司 | Composite cable and composite harness |
-
1995
- 1995-10-12 JP JP28914495A patent/JP3744037B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH09106722A (en) | 1997-04-22 |
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