JPH0529862Y2 - - Google Patents
Info
- Publication number
- JPH0529862Y2 JPH0529862Y2 JP7197189U JP7197189U JPH0529862Y2 JP H0529862 Y2 JPH0529862 Y2 JP H0529862Y2 JP 7197189 U JP7197189 U JP 7197189U JP 7197189 U JP7197189 U JP 7197189U JP H0529862 Y2 JPH0529862 Y2 JP H0529862Y2
- Authority
- JP
- Japan
- Prior art keywords
- die
- friction modifier
- tube
- heat
- heating means
- 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
- 239000011347 resin Substances 0.000 claims description 15
- 229920005989 resin Polymers 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 14
- 239000003607 modifier Substances 0.000 claims description 12
- 238000004519 manufacturing process Methods 0.000 claims description 11
- 239000003795 chemical substances by application Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 229920002545 silicone oil Polymers 0.000 description 3
- 238000001125 extrusion Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 238000001816 cooling Methods 0.000 description 1
- 238000004132 cross linking Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000945 filler Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000001050 lubricating effect Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000010445 mica Substances 0.000 description 1
- 229910052618 mica group Inorganic materials 0.000 description 1
- CWQXQMHSOZUFJS-UHFFFAOYSA-N molybdenum disulfide Chemical compound S=[Mo]=S CWQXQMHSOZUFJS-UHFFFAOYSA-N 0.000 description 1
- 229910052982 molybdenum disulfide Inorganic materials 0.000 description 1
- 239000011343 solid material Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Landscapes
- Shaping By String And By Release Of Stress In Plastics And The Like (AREA)
Description
【考案の詳細な説明】
〔産業上の利用分野〕
この考案は熱収縮チユーブの製造装置、特に押
出偏肉を防止した熱収縮チユーブの製造装置に関
するものである。[Detailed Description of the Invention] [Industrial Application Field] This invention relates to an apparatus for manufacturing a heat-shrinkable tube, and particularly to an apparatus for manufacturing a heat-shrinkable tube that prevents uneven thickness during extrusion.
第２図について従来知られている熱収縮チユー
ブの連続製造装置を説明する。
A conventionally known continuous manufacturing apparatus for heat shrinkable tubes will be explained with reference to FIG.
熱収縮チユーブの材料となる溶融樹脂１５は中
空円柱状のダイス１とこれと同軸的に設けられる
マンドレル２との間に画成される円環状の樹脂通
路３を通つて中空円柱状に押し出され、同じく中
空円柱状の架橋筒７の内壁面に沿い下方に向か
う。このとき中空円柱状の樹脂４と架橋筒７の内
面との間の摩擦を緩和軽減するために、架橋筒７
の端部肉厚部に形成されている摩擦緩和剤流通環
状通路９からたとえばシリコンオイルなどの潤滑
性を有する液状の摩擦緩和剤が架橋筒７の内壁面
に向かつて供給される。 Molten resin 15, which is the material of the heat-shrinkable tube, is extruded into a hollow cylindrical shape through an annular resin passage 3 defined between a hollow cylindrical die 1 and a mandrel 2 provided coaxially with the die 1. , also heading downward along the inner wall surface of the hollow cylindrical bridge tube 7. At this time, in order to reduce the friction between the hollow cylindrical resin 4 and the inner surface of the bridge tube 7, the bridge tube 7 is
A liquid friction-modifying agent having lubricating properties, such as silicone oil, is supplied toward the inner wall surface of the bridge tube 7 from a friction-modifying agent circulation annular passage 9 formed in the thick end portion.
前記チユーブ状に押し出された樹脂４はマンド
レル２を貫通する供給路６から送られる圧力流体
によつて膨張せしめられると同時に、ヒータ８に
よつて加熱架橋され、架橋筒７の下方に連結され
る下方に向かつて大径となる拡径案内管１０の内
面１０Ａに沿つて展伸されて所望の直径まで拡大
され冷却装置１１で冷却されて熱収縮チユーブ１
３となる。 The resin 4 extruded into the tube shape is expanded by the pressure fluid sent from the supply path 6 passing through the mandrel 2, and at the same time is heated and crosslinked by the heater 8, and connected to the lower part of the crosslinking cylinder 7. It is expanded along the inner surface 10A of the diameter-expanding guide tube 10 whose diameter becomes larger as it goes downward, expanded to a desired diameter, and cooled by a cooling device 11 to form a heat-shrinkable tube 1.
It becomes 3.
この後熱収縮チユーブ１３はガイド１２によつ
て偏平に変形された後、１対の押圧引取ロール１
４に挟圧されて図示していない巻取装置に送られ
る。 After that, the heat-shrinkable tube 13 is deformed into a flat shape by the guide 12, and then the heat-shrinkable tube 13 is deformed into a flat shape by the guide 12.
4 and sent to a winding device (not shown).
上述した熱収縮チユーブの製造装置において供
給される摩擦緩和剤としては、たとえば二硫化モ
リブデンなどの固体状のものも使用されるがもつ
とも普通にはシリコンオイルが使用される。この
場合シリコンオイルの粘度を下げて、これを架橋
筒７の内周壁の全円周にわたつて均一に分布させ
ると共に適度の流動性を保持させるために、従来
図示していないが、摩擦緩和剤流通環状通路９付
近を製造装置の外側から加熱する手段が講じられ
ている。 As the friction modifier supplied in the above-mentioned heat shrink tube manufacturing apparatus, solid materials such as molybdenum disulfide are also used, but silicone oil is usually used. In this case, in order to reduce the viscosity of the silicone oil and distribute it uniformly over the entire circumference of the inner circumferential wall of the bridge tube 7 and maintain appropriate fluidity, a friction modifier (not shown in the figure) is used. Measures are taken to heat the vicinity of the circulation annular passage 9 from outside the manufacturing apparatus.
ところが摩擦緩和剤加熱手段として加熱装置を
製造装置の外側に設けると、ダイス１の樹脂押出
し部付近の温度分布が乱されて該温度分布がダイ
ス１の円周方向に一様でなくなるため、押し出さ
れる樹脂に偏肉が生じてしまう問題を招くもので
あつた。
However, if a heating device is provided outside the manufacturing equipment as a friction modifier heating means, the temperature distribution near the resin extrusion part of the die 1 will be disturbed and the temperature distribution will not be uniform in the circumferential direction of the die 1. This resulted in the problem of uneven thickness of the resin being applied.
この考案は上述の問題を解決するためになされ
たものであつて、ダイスとこれと同軸的に設けら
れるマンドレルとの間に円環状の樹脂通路が形成
され、前記ダイスに架橋筒が接続され、その架橋
筒におけるダイスとの接続端部の肉厚部に、架橋
筒の内壁面に摩擦緩和剤を導入するための摩擦緩
和剤流通環状通路が形成されている熱収縮チユー
ブの製造装置において、前記摩擦緩和剤流通環状
通路の内部に円周方向に延びる加熱手段を設けた
熱収縮チユーブの製造装置である。
This invention was made in order to solve the above-mentioned problem, and an annular resin passage is formed between a die and a mandrel provided coaxially with the die, a bridge tube is connected to the die, In the heat-shrinkable tube manufacturing apparatus, a friction modifier distribution annular passage for introducing a friction modifier into the inner wall surface of the bridge tube is formed in the thick wall portion of the end of the bridge tube connected to the die. This is a heat-shrinkable tube manufacturing apparatus in which a heating means extending in the circumferential direction is provided inside a friction modifier circulation annular passage.
ダイスの円周方向の温度分布を乱す要因がない
から、押出される樹脂に偏肉が生じる恐れがな
く、また、摩擦緩和剤はその流通環状通路の内部
に介装されている加熱手段によつて、直接的にか
つ効率的に加熱されてその流動性を増し、架橋筒
の内周壁面と押出された樹脂との間に平均してゆ
きわたる。
Since there are no factors that disturb the temperature distribution in the circumferential direction of the die, there is no risk of uneven thickness of the extruded resin, and the friction modifier is heated by the heating means installed inside the annular passage. Then, the resin is directly and efficiently heated to increase its fluidity and spread evenly between the inner circumferential wall surface of the crosslinked cylinder and the extruded resin.
第１図についてこの考案の一実施例を説明す
る。
An embodiment of this invention will be described with reference to FIG.
第１図においては従来技術を示した第２図と同
一の要素について同一の符号を用いており、第２
図と相違する本考案の特徴的構成を以下に説明す
る。 In Figure 1, the same symbols are used for the same elements as in Figure 2, which shows the prior art.
Characteristic configurations of the present invention that are different from those shown in the drawings will be described below.
この考案においては架橋筒７の端部肉厚部に形
成されている摩擦緩和剤流通環状通路９の内部
に、円周方向に延びる加熱手段１６を配設し、ダ
イス１の周囲には適宜の断熱層１７を設ける。 In this invention, a heating means 16 extending in the circumferential direction is disposed inside a friction-modifying agent distribution annular passage 9 formed in the thick end portion of the bridge tube 7, and an appropriate heating means 16 is provided around the die 1. A heat insulating layer 17 is provided.
加熱手段１６としては、たとえば線状または薄
い帯状の抵抗発熱線を軟質のマイカなどの絶縁板
でおおつて成るいわゆるプレートヒータ、あるい
は同様の発熱線を絶縁充填材と共に可撓管に埋設
して成るいわゆるシースヒータなどを用いること
ができる。 The heating means 16 may be, for example, a so-called plate heater consisting of a linear or thin band-shaped resistance heating wire covered with an insulating plate made of soft mica, or a similar heating wire buried in a flexible tube together with an insulating filler. A so-called sheath heater or the like can be used.
この考案によれば、液状の摩擦緩和剤はそれが
供給されるときに加熱手段１６に直接触れること
によつて効果的に加熱されてその流動性が増大
し、この結果架橋筒７の内周壁面と押出樹脂４と
の間に平均してゆきわたり、押出された樹脂４の
円滑な進行を保証することができ、しかも加熱手
段１６は装置の外部に具備されるものではないの
でダイスの円周方向の温度分布を乱すことがな
く、そのため押出される樹脂が偏肉する恐れを排
除することができるなどの効果が得られる。
According to this invention, the liquid friction modifier is effectively heated by directly touching the heating means 16 when it is supplied, increasing its fluidity, and as a result, the inner periphery of the bridge tube 7 The heating means 16 spreads evenly between the wall surface and the extruded resin 4, and can ensure the smooth progress of the extruded resin 4. Moreover, since the heating means 16 is not provided outside the device, the circle of the die It does not disturb the temperature distribution in the circumferential direction, and therefore it is possible to obtain effects such as being able to eliminate the risk of uneven thickness of the extruded resin.
第１図はこの考案の要部の一実施例を示す拡大
縦断側面図、第２図は従来の熱収縮チユーブの製
造装置を示す縦断側面図である。
１……ダイス、２……マンドレル、３……樹脂
通路、７……架橋筒、９……摩擦緩和剤流通環状
通路、１６……加熱手段。
FIG. 1 is an enlarged vertical side view showing an embodiment of the main part of this invention, and FIG. 2 is a vertical side view showing a conventional heat shrink tube manufacturing apparatus. DESCRIPTION OF SYMBOLS 1...Dice, 2...Mandrel, 3...Resin passage, 7...Bridging cylinder, 9...Friction modifier circulation annular passage, 16...Heating means.
Claims (1)
ル２との間に円環状の樹脂通路３が形成され、前
記ダイス１に架橋筒７が接続され、その架橋筒７
におけるダイス１との接続端部の肉厚部に、架橋
筒７の内壁面に摩擦緩和剤を導入するための摩擦
緩和剤流通環状通路９が形成されている熱収縮チ
ユーブの製造装置において、前記摩擦緩和剤流通
環状通路９の内部に円周方向に延びる加熱手段１
６が介装されていることを特徴とする熱収縮チユ
ーブの製造装置。 An annular resin passage 3 is formed between the die 1 and a mandrel 2 provided coaxially with the die 1, and a bridge tube 7 is connected to the die 1.
In the heat-shrinkable tube manufacturing apparatus, a friction modifier distribution annular passage 9 for introducing a friction modifier into the inner wall surface of the bridging tube 7 is formed in the thick wall portion of the connection end with the die 1 in the above-mentioned Heating means 1 extending circumferentially inside the friction modifier circulation annular passage 9
A heat shrinkable tube manufacturing device characterized in that 6 is interposed therein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7197189U JPH0529862Y2 (en) | 1989-06-20 | 1989-06-20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7197189U JPH0529862Y2 (en) | 1989-06-20 | 1989-06-20 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH039825U JPH039825U (en) | 1991-01-30 |
| JPH0529862Y2 true JPH0529862Y2 (en) | 1993-07-30 |
Family
ID=31609484
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7197189U Expired - Lifetime JPH0529862Y2 (en) | 1989-06-20 | 1989-06-20 |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0529862Y2 (en) |
-
1989
- 1989-06-20 JP JP7197189U patent/JPH0529862Y2/ja not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH039825U (en) | 1991-01-30 |
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