JPS6123090B2 - - Google Patents
Info
- Publication number
- JPS6123090B2 JPS6123090B2 JP54051540A JP5154079A JPS6123090B2 JP S6123090 B2 JPS6123090 B2 JP S6123090B2 JP 54051540 A JP54051540 A JP 54051540A JP 5154079 A JP5154079 A JP 5154079A JP S6123090 B2 JPS6123090 B2 JP S6123090B2
- Authority
- JP
- Japan
- Prior art keywords
- extrusion molding
- vacuum degassing
- degassing chamber
- side wall
- extruded
- 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
- 238000001125 extrusion Methods 0.000 claims description 23
- 238000009849 vacuum degassing Methods 0.000 claims description 19
- 238000000034 method Methods 0.000 claims description 13
- 239000000463 material Substances 0.000 claims description 9
- 239000012815 thermoplastic material Substances 0.000 claims description 8
- 239000000498 cooling water Substances 0.000 description 3
- 230000007423 decrease Effects 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- 239000004809 Teflon Substances 0.000 description 1
- 229920006362 Teflon® Polymers 0.000 description 1
- 239000011248 coating agent Substances 0.000 description 1
- 238000000576 coating method Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000012438 extruded product Nutrition 0.000 description 1
- 238000010070 extrusion (rubber) Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000007747 plating Methods 0.000 description 1
- 239000004636 vulcanized rubber Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 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
- B29C48/78—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling
- B29C48/86—Thermal treatment of the extrusion moulding material or of preformed parts or layers, e.g. by heating or cooling at the nozzle zone
- B29C48/87—Cooling
-
- 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
-
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/76—Venting, drying means; Degassing means
-
- 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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/76—Venting, drying means; Degassing means
- B29C48/765—Venting, drying means; Degassing means in the extruder apparatus
- B29C48/766—Venting, drying means; Degassing means in the extruder apparatus in screw extruders
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
この発明は熱可塑性材料、特にゴムの押出し成
形に好適な押出し成形方法に関する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an extrusion molding method suitable for extrusion molding of thermoplastic materials, particularly rubber.
従来よりゴムの押出し成形方法の一例として、
第１図に示す方法、すなわち２軸ベント押出機を
利用した押出し成形方法が知られている。この押
出し成形方法はリボンと称される帯状のゴム材料
が第１の押出し成形機１において混練溶融された
後、ブレーカー２を経て真空脱気室３内に押出さ
れる。この真空脱気室にはブレーカー２に対向し
て回転カツター４が回転自在に支承されており、
ブレーカー２より押出されたゴムはミクロン単位
に切断される。さらにこのとき発生する気体は排
気口（図示を省略した）から真空脱気室３の外部
に排出される。 As an example of a conventional rubber extrusion molding method,
The method shown in FIG. 1, ie, the extrusion molding method using a twin-screw vent extruder, is known. In this extrusion molding method, a band-shaped rubber material called a ribbon is kneaded and melted in a first extruder 1, and then extruded through a breaker 2 into a vacuum degassing chamber 3. A rotary cutter 4 is rotatably supported in this vacuum deaeration chamber, facing the breaker 2.
The rubber extruded from the breaker 2 is cut into micron units. Furthermore, the gas generated at this time is discharged to the outside of the vacuum degassing chamber 3 from an exhaust port (not shown).
このようにして細かく切断されたものが、さら
に前記真空脱気室３に連通する第２の押出し成形
機５に落下し、この第２の押出し成形機５によつ
て所定の形状例えばケーブルのシースに押出し成
形される。 The finely cut pieces are further dropped into a second extrusion molding machine 5 which communicates with the vacuum deaeration chamber 3, and are shaped into a predetermined shape, for example, a cable sheath by this second extrusion molding machine 5. extruded into.
しかしながら、前述した渋来の押出し成形方法
においては、第１の押出し成形機で押出されたゴ
ムは高温の状態であることに加えて、回転カツタ
ーで細かく切断する際に発熱しこの熱が加わつて
100℃以上の温度となり、このため細かく切断さ
れたゴムは真空脱気室３の側壁の内面上に附着さ
れてしまう欠点がある。そしてこの附着したゴム
はそのまま加硫されてしまい、この加硫されたゴ
ムが落下して第２の押出し成形機５に供給されそ
のまま押出されると押出し成形品の外観を損ねる
ことになる。 However, in the traditional extrusion molding method described above, the rubber extruded by the first extruder is not only in a high temperature state, but also generates heat when being cut into pieces with a rotating cutter.
The temperature reaches 100° C. or higher, and therefore, there is a disadvantage that the finely cut rubber ends up adhering to the inner surface of the side wall of the vacuum degassing chamber 3. The adhered rubber is then vulcanized as it is, and if the vulcanized rubber falls and is supplied to the second extruder 5 and extruded as it is, the appearance of the extruded product will be impaired.
この発明は前述の欠点を排除したものであつ
て、２軸ベント押出機を利用して押出し成形を行
う際に、回転カツターで細かく切断された熱可塑
性材料が真空脱気室の内壁面に附着することのな
い押出し成形方法を提供することを目的とする。 This invention eliminates the above-mentioned drawbacks, and when extrusion molding is performed using a twin-screw vent extruder, the thermoplastic material cut into small pieces by a rotary cutter adheres to the inner wall surface of the vacuum degassing chamber. The purpose is to provide an extrusion molding method that does not require
次にこの発明の一実施例について図面を参照し
て詳細に説明する。 Next, one embodiment of the present invention will be described in detail with reference to the drawings.
第２図はこの発明の実施に使用する装置の一例
を示すものであつて、真空脱気室３の側壁３Ａの
外側に外板６が設置され、この外板６と真空脱気
室の側壁３Ａとの間において冷却水Ｗの循環路が
形成される。さらに真空脱気室３の側壁３Ａの内
面には硬質クロムメツキあるいはテフロンコーテ
イング等が施されてその表面が平滑に仕上げられ
ている。なお７は冷却水の給水孔、８は排出孔で
ある。 FIG. 2 shows an example of an apparatus used for carrying out the present invention, in which an outer plate 6 is installed outside the side wall 3A of the vacuum degassing chamber 3, and the outer plate 6 and the side wall of the vacuum degassing chamber 3 are 3A, a circulation path for cooling water W is formed. Further, the inner surface of the side wall 3A of the vacuum deaeration chamber 3 is coated with hard chrome plating or Teflon coating to give a smooth surface finish. Note that 7 is a water supply hole for cooling water, and 8 is a discharge hole.
しかして、第１の押出し成形機１にてゴム等の
材料を混練溶融させると共にこれをブレーカー２
を経て真空脱気室３内に押出す。さらにこの材料
はブレーカー２に対向して回転自在に支承される
回転カツター４により細かく切断される。このと
き真空脱気室３の側壁３Ａの内面温度がほぼ30℃
を超えないように制御されている。このため細か
く切断された材料が回転カツターにより飛散され
て前記側壁３Ａの表面に到達しても、この材料は
ただちに冷却されると共に側壁３Ａの表面は平滑
に加工されているので、側壁の表面にほとんど附
着せずに、そのまま第２の押出成形機５の入口に
落下する。 Then, materials such as rubber are kneaded and melted in the first extrusion molding machine 1, and then transferred to the breaker 2.
It is extruded into the vacuum degassing chamber 3 through the. Further, this material is cut into pieces by a rotary cutter 4 rotatably supported opposite the breaker 2. At this time, the inner surface temperature of the side wall 3A of the vacuum degassing chamber 3 is approximately 30°C.
controlled so as not to exceed. Therefore, even if the finely cut material is scattered by the rotating cutter and reaches the surface of the side wall 3A, this material is immediately cooled and the surface of the side wall 3A is processed to be smooth, so that the material does not stick to the surface of the side wall. It falls directly into the inlet of the second extrusion molding machine 5 with almost no adhesion.
なお前記真空脱気室３の側壁の温度が30℃より
も高くなつていくと前記欠点の発生が著しくな
り、また前記側壁の温度が常温（約15℃）よりも
低くなつていくと、押出機自体の温度もそれに伴
なつて低下して押出し効率が低下していく。した
がつて前記側壁の温度の温度を常温から30℃まで
の範囲に保つのが好ましい。 Note that as the temperature of the side wall of the vacuum degassing chamber 3 becomes higher than 30°C, the occurrence of the above-mentioned defects becomes remarkable, and as the temperature of the side wall becomes lower than room temperature (approximately 15°C), the extrusion The temperature of the machine itself also decreases, and the extrusion efficiency decreases. Therefore, it is preferable to maintain the temperature of the side wall in a range from room temperature to 30°C.
この発明によれば、第１の押出し成形機で混練
溶融された熱可塑性材料が真空脱気室３内で細か
く切断される際に、この真空脱気室の側壁内面が
冷却されているので、たとえ細かく切断された高
温の材料が真空脱気室の側壁内面にまで飛散され
ても、これがただちに冷却されるので側壁内面に
附着することがない。このため加硫された材料が
第２の押出し成形機に供給されることがないとい
つた効果がある。 According to this invention, when the thermoplastic material kneaded and melted in the first extrusion molding machine is cut into pieces in the vacuum degassing chamber 3, the inner surface of the side wall of the vacuum degassing chamber 3 is cooled. Even if the finely cut high-temperature material is scattered onto the inner surface of the side wall of the vacuum degassing chamber, it will not be attached to the inner surface of the side wall because it will be immediately cooled down. This has the effect that the vulcanized material is not supplied to the second extruder.
第１図は従来の押出し成形方法を説明するため
の一部切断側面図、第２図はこの発明方法の一実
施例を説明するための一部切断側面図である。
図において、１は押出し成形機、２はブレーカ
ー、３は真空脱気室、４は回転カツター、５は第
２の押出し成形機、６は外板、Ｗは冷却水であ
る。
FIG. 1 is a partially cutaway side view for explaining a conventional extrusion molding method, and FIG. 2 is a partially cutaway side view for explaining an embodiment of the method of the present invention. In the figure, 1 is an extrusion molding machine, 2 is a breaker, 3 is a vacuum degassing chamber, 4 is a rotary cutter, 5 is a second extrusion molding machine, 6 is an outer plate, and W is a cooling water.
Claims (1)
空脱気室内に押出し加工すると共に、この押出し
加工された熱可塑性材料を前記真空脱気室内で細
かく切断した後、この細かく切断された材料を前
記真空脱気室に連通する第２の押出し成形機に供
給して所定の形状に押出し成形するようにした押
出し成形方法において、真空脱気室３の側壁を強
制的に冷却して、回転カツターで細かく切断され
た熱可塑性材料の前記真空脱気室の内壁面への附
着を防止することを特徴とする熱可塑性材料の押
出し成形方法。 ２ 前記真空脱気室の内壁面の温度を常温から30
℃の範囲に保つことを特徴とする特許請求の範囲
第１項記載の熱可塑性材料の押出し成形方法。[Scope of Claims] 1. A thermoplastic material is extruded into a vacuum degassing chamber by a first extrusion molding machine, and the extruded thermoplastic material is cut into pieces in the vacuum degassing chamber. In an extrusion molding method in which the cut material is supplied to a second extrusion molding machine communicating with the vacuum degassing chamber and extruded into a predetermined shape, the side wall of the vacuum degassing chamber 3 is forcibly cooled. A method for extrusion molding a thermoplastic material, characterized in that the thermoplastic material cut into pieces by a rotary cutter is prevented from adhering to the inner wall surface of the vacuum degassing chamber. 2. The temperature of the inner wall surface of the vacuum degassing chamber is increased from room temperature to 30°C.
2. A method for extrusion molding a thermoplastic material according to claim 1, wherein the extrusion molding method is maintained at a temperature within a range of .degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5154079A JPS55144135A (en) | 1979-04-27 | 1979-04-27 | Extrusion molding of thermoplastic material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5154079A JPS55144135A (en) | 1979-04-27 | 1979-04-27 | Extrusion molding of thermoplastic material |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55144135A JPS55144135A (en) | 1980-11-10 |
| JPS6123090B2 true JPS6123090B2 (en) | 1986-06-04 |
Family
ID=12889850
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5154079A Granted JPS55144135A (en) | 1979-04-27 | 1979-04-27 | Extrusion molding of thermoplastic material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55144135A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS591614A (en) * | 1983-02-21 | 1984-01-07 | Tokai Carbon Co Ltd | Method for controlling density of carbonaceous material |
| JPS6141520A (en) * | 1984-08-04 | 1986-02-27 | Idemitsu Petrochem Co Ltd | Method of kneading and extruding polyolefin resin |
-
1979
- 1979-04-27 JP JP5154079A patent/JPS55144135A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55144135A (en) | 1980-11-10 |
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