JPH0721297Y2 - Resin extrusion equipment - Google Patents
Resin extrusion equipmentInfo
- Publication number
- JPH0721297Y2 JPH0721297Y2 JP1990053578U JP5357890U JPH0721297Y2 JP H0721297 Y2 JPH0721297 Y2 JP H0721297Y2 JP 1990053578 U JP1990053578 U JP 1990053578U JP 5357890 U JP5357890 U JP 5357890U JP H0721297 Y2 JPH0721297 Y2 JP H0721297Y2
- Authority
- JP
- Japan
- Prior art keywords
- resin
- additive
- extruder
- crosshead
- cross
- 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
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
- B29C48/865—Heating
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
本考案は、ゴム、プラスチックどの樹脂中に架橋剤など
の添加剤を混合するにおいて有用な樹脂押出装置に関す
るものである。The present invention relates to a resin extruding device useful for mixing an additive such as a crosslinking agent into a resin such as rubber or plastic.
従来、２段押出方式を取り、例えば第２図に示したよう
に、ポリエチレンなどのプラスチック樹脂に架橋剤や老
化防止剤などの添加剤を混合する場合、第１の押出機１
にフィルター部２、冷却部３などを介して接続部をなす
クロスヘッド４を接続し、この第１の押出機１から供給
されるプラスチック樹脂中に、上記クロスヘッド４に接
続された添加剤圧入装置５から所望量の添加剤を圧入、
混合し、この混合されたプラスチック樹脂を、第２の押
出機６に導き、この第２の押出機６のヘッド部７から、
例えば電線導体８に絶縁体９としてプラスチック樹脂を
押出被覆する方法が、既に提案れている。Conventionally, a two-step extrusion method is adopted, and for example, as shown in FIG. 2, when a plastic resin such as polyethylene is mixed with additives such as a crosslinking agent and an antioxidant, the first extruder 1 is used.
A crosshead 4 forming a connecting part is connected to the above via a filter part 2, a cooling part 3, etc., and the additive press-fitted to the crosshead 4 is injected into the plastic resin supplied from the first extruder 1. Press the desired amount of additive from device 5,
After mixing, the mixed plastic resin is guided to the second extruder 6, and from the head portion 7 of the second extruder 6,
For example, a method has already been proposed in which the electric wire conductor 8 is extrusion-coated with a plastic resin as the insulator 9.
このような樹脂押出装置において、例えば添加剤として
ジクミルパーオキサイド（DCP）などの架橋剤を例にと
ると、液状として圧入するには、DCPをその融点である4
0℃以上に保持する必要がある。かといって、あまり高
温になると、DCPの分解が促進され、その結果、良質な
架橋剤入りの樹脂が得られないことが起こる。 従来のこの種の装置では、添加剤通路において、樹脂へ
の注入部であるクロスヘッド４の手前までは架橋剤を60
〜70℃程度で調温してあり、何ら問題がないものの、ク
ロスヘッド４内では、第３図に示したように、添加剤通
路10と樹脂通路11とが接近して形成されているため、樹
脂側の高い温度による調温によって悪影響を受けるとい
う問題があった。 つまり、このクロスヘッド４では、樹脂を溶融状態に保
っておく必要があるから、例えばヘッド外周に設置した
加熱ヒータ12などにより、110〜120℃程度にもなる高温
に加熱してあり、この高温度にDCPが晒されると、DCPの
分解が促進されるという問題があった。特に、このDCP
の分解速度は、温度上昇に対して対数的に増加するもの
であるため、添加剤通路10の適性な温度制御が是非とも
必要とされていた。 本考案は、このような従来の実情に鑑みてなされたもの
である。In such a resin extruder, for example, when a cross-linking agent such as dicumyl peroxide (DCP) is used as an additive, in order to press it in as a liquid, DCP has a melting point of 4
It is necessary to keep the temperature above 0 ° C. However, if the temperature becomes too high, the decomposition of DCP is promoted, and as a result, a resin containing a good cross-linking agent may not be obtained. In the conventional device of this type, the cross-linking agent is added up to 60 in front of the crosshead 4 which is the injection portion into the resin in the additive passage.
Although the temperature is controlled at about 70 ° C. and there is no problem, the additive passage 10 and the resin passage 11 are formed close to each other in the crosshead 4 as shown in FIG. However, there is a problem in that the temperature adjustment due to the high temperature on the resin side is adversely affected. That is, in this crosshead 4, since it is necessary to keep the resin in a molten state, the resin is heated to a high temperature of about 110 to 120 ° C., for example, by the heater 12 installed on the outer circumference of the head. There is a problem that the decomposition of DCP is accelerated when the DCP is exposed to the temperature. Especially this DCP
Since the decomposition rate of (1) increases logarithmically with increasing temperature, appropriate temperature control of the additive passage 10 has been absolutely necessary. The present invention has been made in view of such a conventional situation.
かゝる本考案の要旨とする点は、第１の押出機で架橋剤
などの添加剤を含まないゴム、プラスチックなどの樹脂
を押し出し、第２の押出機との接続部で前記樹脂に架橋
剤などの添加剤を圧入、混合し、これを第２の押出機で
混練して押し出す樹脂押出装置において、前記接続部の
クロスヘッド内の架橋剤などの添加剤を樹脂に注入する
添加剤通路の周囲に断熱層を設けたことを特徴とする樹
脂押出装置にある。The gist of the present invention is to extrude a resin such as rubber or plastic containing no additive such as a cross-linking agent by the first extruder and cross-link the resin at the connection with the second extruder. In a resin extruding device in which additives such as an agent are press-fitted and mixed, and the mixture is extruded by kneading with a second extruder, an additive passage for injecting an additive such as a cross-linking agent in the crosshead of the connection part into the resin A resin extruding device is characterized in that a heat insulating layer is provided around the.
この装置では、断熱層の働きにより添加剤通路側の温度
上昇が押さえられため、添加剤の分解が抑制され、良好
な添加剤入り樹脂が得られる。In this device, the function of the heat insulating layer suppresses the temperature rise on the additive passage side, so that the decomposition of the additive is suppressed and a good resin containing the additive is obtained.
第１図は本考案に係る樹脂押出装置におけるクロスヘッ
ドの一実施例を示したものであり、このクロスヘッド4A
では、添加剤通路10の周囲に断熱層13を設けてある。な
お、本樹脂押出装置において、他の構成部分は上述した
第２図の樹脂押出装置の場合と同様である。 この断熱層13は、その構造、使用材質などは特に限定さ
れないが、例えば単なる空気層としたり、あるいは適当
な断熱材を充填して形成するとよい。そして、その断熱
性能としては、例えばポリエチレン樹脂で、添加剤がDC
Pの場合、樹脂側の調温が110〜120℃程度になるわけで
あるが、このとき、添加剤通路10の温度が60〜70℃程度
に保たれる性能であればよい。 この断熱層13の断熱効果により、添加剤通路10は最適温
度に制御される。FIG. 1 shows an embodiment of a crosshead in a resin extrusion apparatus according to the present invention. This crosshead 4A
Then, a heat insulating layer 13 is provided around the additive passage 10. The other components of the resin extrusion device are the same as those of the resin extrusion device of FIG. 2 described above. The structure and material used for the heat insulating layer 13 are not particularly limited, but may be a simple air layer or may be formed by filling an appropriate heat insulating material. And as for its heat insulation performance, for example, polyethylene resin and the additive is DC
In the case of P, the temperature control on the resin side is about 110 to 120 ° C., but at this time, it is sufficient if the temperature of the additive passage 10 is maintained at about 60 to 70 ° C. Due to the heat insulating effect of the heat insulating layer 13, the additive passage 10 is controlled to an optimum temperature.
このように本考案の樹脂押出装置によれば、クロスヘッ
ド内の添加剤通路の周囲に断熱層を設けてあるため、添
加剤通路の温度上昇が効果的に押さえられる。従って、
この添加剤通路に圧入される添加剤の分解が抑制され、
結果として、良好な添加剤入り樹脂が得られる。As described above, according to the resin extruder of the present invention, since the heat insulating layer is provided around the additive passage in the crosshead, the temperature rise of the additive passage can be effectively suppressed. Therefore,
Decomposition of the additive that is press-fitted into this additive passage is suppressed,
As a result, a good additive-containing resin is obtained.
第１図は本考案に係る樹脂押出装置におけるクロスヘッ
ドの一実施例を示した縦断面図、第２図は一般的な２段
押出方式による樹脂押出装置の概略説明図、第３図は第
２図の樹脂押出装置における第１の押出機と第２の押出
機を接続するクロスヘッドを示した縦断面図である。 図中、 １……第１の押出機、4A……クロスヘッド、６……第２
の押出機、10……添加剤通路、11……樹脂通路、13……
断熱層、FIG. 1 is a vertical sectional view showing an embodiment of a crosshead in a resin extrusion apparatus according to the present invention, FIG. 2 is a schematic explanatory view of a resin extrusion apparatus using a general two-stage extrusion method, and FIG. FIG. 3 is a vertical cross-sectional view showing a crosshead that connects the first extruder and the second extruder in the resin extruder of FIG. 2. In the figure, 1 ... First extruder, 4A ... Crosshead, 6 ... Second
Extruder, 10 …… Additive passage, 11 …… Resin passage, 13 ……
Insulation layer,
フロントページの続き (56)参考文献 特開 昭60−84721（ＪＰ，Ａ) 実開 平２−34226（ＪＰ，Ｕ) 実開 平２−15325（ＪＰ，Ｕ)Continuation of front page (56) Reference JP-A-60-84721 (JP, A) Actual development flat 2-34226 (JP, U) Actual development flat 2-15325 (JP, U)
Claims (1)
ないゴム、プラスチックなどの樹脂を押し出し、第２の
押出機との接続部で前記樹脂に架橋剤などの添加剤を圧
入、混合し、これを第２の押出機で混練して押し出す樹
脂押出装置において、前記接続部のクロスヘッド内の架
橋剤などの添加剤を樹脂に注入する添加剤通路の周囲に
断熱層を設けたことを特徴とする樹脂押出装置。1. A first extruder extrudes a resin such as rubber or plastic containing no additive such as a cross-linking agent, and an additive such as a cross-linking agent is pressed into the resin at a connecting portion with a second extruder. In a resin extrusion device that mixes and extrudes the mixture by a second extruder, a heat insulating layer is provided around an additive passage for injecting an additive such as a cross-linking agent into the resin in the crosshead of the connection portion. A resin extrusion device characterized in that
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990053578U JPH0721297Y2 (en) | 1990-05-24 | 1990-05-24 | Resin extrusion equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1990053578U JPH0721297Y2 (en) | 1990-05-24 | 1990-05-24 | Resin extrusion equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0413320U JPH0413320U (en) | 1992-02-03 |
| JPH0721297Y2 true JPH0721297Y2 (en) | 1995-05-17 |
Family
ID=31574887
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1990053578U Expired - Lifetime JPH0721297Y2 (en) | 1990-05-24 | 1990-05-24 | Resin extrusion equipment |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0721297Y2 (en) |
-
1990
- 1990-05-24 JP JP1990053578U patent/JPH0721297Y2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0413320U (en) | 1992-02-03 |
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