JPS6149765B2 - - Google Patents
Info
- Publication number
- JPS6149765B2 JPS6149765B2 JP53038936A JP3893678A JPS6149765B2 JP S6149765 B2 JPS6149765 B2 JP S6149765B2 JP 53038936 A JP53038936 A JP 53038936A JP 3893678 A JP3893678 A JP 3893678A JP S6149765 B2 JPS6149765 B2 JP S6149765B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- crosslinking
- steam
- cable
- saturated steam
- 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
Links
- 238000004132 cross linking Methods 0.000 claims description 15
- 238000010438 heat treatment Methods 0.000 claims description 11
- 229920006395 saturated elastomer Polymers 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 229920001971 elastomer Polymers 0.000 claims description 3
- 239000004033 plastic Substances 0.000 claims description 3
- 229920003023 plastic Polymers 0.000 claims description 3
- 238000001816 cooling Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Chemical compound O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 3
- 239000004698 Polyethylene Substances 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 239000004020 conductor Substances 0.000 description 1
- 229920003020 cross-linked polyethylene Polymers 0.000 description 1
- 239000004703 cross-linked polyethylene Substances 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 239000012212 insulator Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 239000011347 resin Substances 0.000 description 1
- 229920005989 resin Polymers 0.000 description 1
- 238000010025 steaming Methods 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/25—Component parts, details or accessories; Auxiliary operations
- B29C48/88—Thermal treatment of the stream of extruded material, e.g. cooling
- B29C48/91—Heating, e.g. for cross linking
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/05—Filamentary, e.g. strands
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C48/00—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor
- B29C48/03—Extrusion moulding, i.e. expressing the moulding material through a die or nozzle which imparts the desired form; Apparatus therefor characterised by the shape of the extruded material at extrusion
- B29C48/06—Rod-shaped
Description
【発明の詳細な説明】
本発明は連続架橋装置による架橋ポリエチレン
および加硫ゴムケーブルの製造方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a method for producing crosslinked polyethylene and vulcanized rubber cables using a continuous crosslinking apparatus.
従来この種の架橋装置では加熱手段として、温
度管理が容易であり、架橋筒内への封入、放出な
どの作業性が良い飽和水蒸気（約５〜25気圧）が
用いられてきた。 Conventionally, this type of crosslinking apparatus has used saturated steam (approximately 5 to 25 atmospheres) as a heating means because it is easy to control temperature and has good workability in filling and releasing steam into the crosslinking cylinder.
しかしながら、飽和水蒸気は温度と圧力が従属
関係にあり、架橋速度を大きくするために、温度
を上げようとすると必然的に圧力を上昇せねばな
らない。 However, the temperature and pressure of saturated steam are dependent, and in order to increase the crosslinking rate, if the temperature is to be increased, the pressure must necessarily be increased.
たとえば350℃程度にすると、架橋速度は200℃
の場合の約１・８倍にあるが圧力は170気圧程度
になるもので、製造設備としては実現不可能なも
のとなる。 For example, if the temperature is about 350℃, the crosslinking rate will be 200℃.
Although the pressure is approximately 1.8 times that in the case of , the pressure is about 170 atmospheres, which is impossible to implement as a manufacturing facility.
したがつて、飽和水蒸気の熱エネルギのみを加
熱架橋に使用する場合は、自らその能力に限界が
あり、25気圧（225℃）程度が限度であるとみら
れる。この圧力以上では架橋、冷却筒や付帯設備
の耐圧構造に多大の経済的負担が付加される。 Therefore, if only the thermal energy of saturated steam is used for thermal crosslinking, there is a limit to its ability, and the limit seems to be around 25 atmospheres (225°C). Above this pressure, a great economic burden is added to the pressure-resistant structures of bridges, cooling tubes, and ancillary equipment.
本発明はこれらの不利を解消し、蒸気圧力をほ
とんど上昇させないで架橋速度を増加させること
を可能としたもので、これは架橋筒の加熱部に封
入した飽和水蒸気を循環加熱して過熱水蒸気化
し、これを設定圧力に調整しながら、被架橋ケー
ブル周囲に供給することを特徴とするゴム・プラ
スチツクケーブルの製造方法である。 The present invention eliminates these disadvantages and makes it possible to increase the crosslinking speed with almost no increase in steam pressure.This invention involves circulating and heating saturated steam sealed in the heating section of a crosslinking tube to convert it into superheated steam. This method of manufacturing a rubber/plastic cable is characterized in that the pressure is adjusted to a set pressure and supplied around the crosslinked cable.
以下図面に示す本発明の実施例について説明す
る。第１図において１は未架橋（未加硫）のプラ
スチツクまたはゴムケーブルで、押出機クロスヘ
ツド２より連続的に絶縁物を被覆されて架橋筒３
内へ送入される。架橋筒３は加熱部Ａと冷却部Ｂ
からなり、加熱部Ａに封入された飽和水蒸気４は
筒外に設けられた加熱装置４熱交換器）５により
さらに熱エネルギが与えられて乾燥過熱蒸気化さ
れ、循環装置（ブロワーなど）６により強制対流
させられる。この場合、飽和水蒸気の温度は過熱
蒸気化によつて上昇するが、筒内の圧力は、飽和
水蒸気送入側に設けられた圧力調整装置７により
自由に選択調整できるので、たとえば設定圧力を
飽和水蒸気より１〜2atm高い程度に保持され
る。これによつて被架橋ケーブル１は加熱部にお
いて、過熱水蒸気から従来より高温の架橋エネル
ギを受けるので大巾に架橋速度を増大させること
ができる。 Embodiments of the present invention shown in the drawings will be described below. In Fig. 1, reference numeral 1 denotes an uncrosslinked (unvulcanized) plastic or rubber cable, which is continuously coated with an insulator from the crosshead 2 of the extruder and then 3
sent inside. The bridge tube 3 has a heating section A and a cooling section B.
The saturated steam 4 sealed in the heating section A is further given thermal energy by a heating device 4 (heat exchanger) 5 provided outside the cylinder, and is converted into dry and superheated vapor, and is then turned into dry and superheated vapor by a circulation device (such as a blower) 6. forced convection. In this case, the temperature of the saturated steam increases due to superheated steaming, but the pressure inside the cylinder can be freely selectively adjusted by the pressure regulator 7 provided on the saturated steam supply side, so for example, the set pressure can be adjusted to saturation. It is maintained at 1 to 2 atm higher than water vapor. As a result, the crosslinked cable 1 receives crosslinking energy from the superheated steam at a higher temperature than before in the heating section, so that the crosslinking speed can be greatly increased.
本発明の方法を実施するに当つて、架橋筒外壁
にヒータを設ければ、過熱水蒸気の保温に有効で
あり、ヒータによつてさらに設定温度を上昇すれ
ば管壁からのふく射エネルギがケーブルに重畳さ
れ架橋速度を一層促進させることができる。 When carrying out the method of the present invention, providing a heater on the outer wall of the bridge tube will be effective in keeping the superheated steam warm, and if the set temperature is further increased by the heater, the radiant energy from the tube wall will be transferred to the cable. The crosslinking rate can be further accelerated by being superimposed.
なお、架橋筒内の水蒸気圧力は、温度が設定温
度近傍でコントロールされていればゲールサツク
の法則に基き使用範囲で１〜2atm上昇する。こ
の程度の圧力上昇は問題にならないが、この圧力
上昇分を降下させるには、たとえば筒内蒸気を一
部逃がすなどの方法がある。 Note that if the temperature is controlled near the set temperature, the water vapor pressure within the crosslinking cylinder will rise by 1 to 2 atm within the operating range based on Gehrsack's law. Although this degree of pressure increase is not a problem, there are methods to reduce this pressure increase, such as by letting some of the steam in the cylinder escape.
実施例
第１図に示す構成の架橋筒（加熱部25m、冷却
部35m）で導体径40mm、被覆樹脂厚14mmの未架橋
ポリエチレンケーブルを架橋した。この場合、加
熱部に圧入した飽和水蒸気（圧力10atm、温度
183℃）をブロワで約100KWの熱交換器を経由し
5m／秒で循環させながら300℃まで加熱し、過熱
水蒸気化したところ、線速0.9m／分で架橋する
ことができた。Example An uncrosslinked polyethylene cable having a conductor diameter of 40 mm and a coating resin thickness of 14 mm was crosslinked using a crosslinking tube configured as shown in FIG. 1 (heating section 25 m, cooling section 35 m). In this case, saturated steam (pressure 10 atm, temperature
183℃) with a blower via an approximately 100KW heat exchanger.
When the mixture was heated to 300°C while circulating at 5 m/sec and superheated to steam, crosslinking was achieved at a linear speed of 0.9 m/min.
比較のため、同一筒長比で、前記飽和水蒸気の
みを用いた場合の製造線速は0.6m／分であつ
た。なお、この場合の圧力は10.5atmとなつたが
理論値より圧力上昇しなかつたのは熱放散などに
より消費されたためと思われる。 For comparison, the production line speed was 0.6 m/min when only the saturated steam was used with the same tube length ratio. The pressure in this case was 10.5 atm, but the reason why the pressure did not rise above the theoretical value is probably because it was consumed by heat dissipation.
第１図は本発明方法を実施する装置の概略説明
図である。
１……ケーブル、２……クロスヘツド、３……
架橋筒、４……水蒸気、５……加熱装置、６……
循環装置、７……圧力調整装置。
FIG. 1 is a schematic explanatory diagram of an apparatus for carrying out the method of the present invention. 1...Cable, 2...Crosshead, 3...
Bridge cylinder, 4... water vapor, 5... heating device, 6...
Circulation device, 7...pressure adjustment device.
Claims (1)
加熱して過熱水蒸気化し、これを設定圧力に調整
しながら被架橋ケーブル周囲に供給することを特
徴とするゴム・プラスチツクケーブルの製造方
法。1. A method for producing a rubber/plastic cable, which comprises circulating and heating saturated steam sealed in a heating section of a crosslinking tube to convert it into superheated steam, and supplying this to the periphery of a crosslinked cable while adjusting the pressure to a set pressure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3893678A JPS54131788A (en) | 1978-04-03 | 1978-04-03 | Method of fabricating rubber or plastic cable |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3893678A JPS54131788A (en) | 1978-04-03 | 1978-04-03 | Method of fabricating rubber or plastic cable |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS54131788A JPS54131788A (en) | 1979-10-13 |
| JPS6149765B2 true JPS6149765B2 (en) | 1986-10-31 |
Family
ID=12539102
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3893678A Granted JPS54131788A (en) | 1978-04-03 | 1978-04-03 | Method of fabricating rubber or plastic cable |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS54131788A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0745848Y2 (en) * | 1988-06-17 | 1995-10-18 | 矢崎総業株式会社 | Cross-linking equipment for cross-linked polyethylene insulated cables |
| JP5946750B2 (en) * | 2012-11-06 | 2016-07-06 | 住友重機械工業株式会社 | Injection molding machine and injection molding method |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5314389A (en) * | 1976-07-24 | 1978-02-08 | Showa Electric Wire & Cable Co | Process and apparatus for manufacturing crossslinked polyolefin insulated cable |
-
1978
- 1978-04-03 JP JP3893678A patent/JPS54131788A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5314389A (en) * | 1976-07-24 | 1978-02-08 | Showa Electric Wire & Cable Co | Process and apparatus for manufacturing crossslinked polyolefin insulated cable |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS54131788A (en) | 1979-10-13 |
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