JPS5831728A - Plasticizing and kneading apparatus for plastic extruder - Google Patents
Plasticizing and kneading apparatus for plastic extruderInfo
- Publication number
- JPS5831728A JPS5831728A JP56129211A JP12921181A JPS5831728A JP S5831728 A JPS5831728 A JP S5831728A JP 56129211 A JP56129211 A JP 56129211A JP 12921181 A JP12921181 A JP 12921181A JP S5831728 A JPS5831728 A JP S5831728A
- Authority
- JP
- Japan
- Prior art keywords
- rod
- plastic
- screw
- ring
- grooves
- 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.)
- Granted
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
- B29C48/36—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die
- B29C48/50—Details of extruders
- B29C48/505—Screws
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【発明の詳細な説明】
本発明はプラスチック押出機において、プラスチックの
可塑化、混線を促進する装置に関するものである。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for promoting plasticization and cross-contamination of plastic in a plastic extruder.
押出機から押し出されるプラスチックの可塑化状態には
、
■ バレル内面で剪断溶融された良可塑化状態。The plasticized state of the plastic extruded from the extruder is as follows: ■ A well-plasticized state resulting from shear melting on the inner surface of the barrel.
■ 溶融層からの伝熱により固体層が軟化しただけの状
態。■ A state in which the solid layer has simply softened due to heat transfer from the molten layer.
■ 軟化も不充分な全くの未溶融状態。■ Completely unmolten state with insufficient softening.
０３種類がある。There are 03 types.
上記３種類のうち、■、■の状態のプラスチックが押出
機のノズルから出てくると可塑化混練不良とされるので
、■、■の状態のものを低圧力損失で可塑化、混練する
装置が必要となる。Of the three types mentioned above, if plastic in the state of ■ or ■ comes out of the nozzle of the extruder, it is considered to be poor plasticization and kneading, so a device that plasticizes and kneads the plastic in the state of Is required.
従来使用されているプラスチック押出機用可塑化混練装
置の一例を第１図、第２図について説明すると、押出様
のスクリュー（ｇ）先端の延長軸線上にロッド（旬が取
り付けられている。ロッド（Ａ）の外表面には、複数の
溝（＃）、（雨がロッド（Ａ）の軸線方向に交互に設け
られている。そして一方の組の溝（Ｃ）は、第１図で明
らかなようにスクリュー（−）側の端部はスクリュー（
α）の空間につな□がっており、反対のロッド（０先端
側の端部は閉鎖された端部になっている。また他方の組
の溝（ｄ）は、スクリュー（α）側の端部は閉鎖されて
いるが、ロッド（Ａ）先端側の端部は外部につながって
いる。An example of a conventionally used plasticizing and kneading device for a plastic extruder is explained with reference to FIGS. The outer surface of (A) is provided with a plurality of grooves (#), which are alternately provided in the axial direction of the rod (A), and one set of grooves (C) is clearly visible in FIG. The end on the screw (-) side is connected to the screw (
α) is connected to the space □, and the end on the opposite rod (0 tip side is a closed end).The other set of grooves (d) are connected to the screw (α) side. The end of the rod (A) is closed, but the end on the tip side of the rod (A) is connected to the outside.
スクリュー（ａ）およびロッド（Ｉ））の外側はリテー
ナ（６）に囲まれており、リテーナ（−）の内面とロッ
ド（ｂ）の外表面との間には隙間（イ）が設けられてお
り、リテーナ（−）の先端（第１図における右端）には
、開口部（！１）が設けられている。The outside of the screw (a) and rod (I)) is surrounded by a retainer (6), and a gap (A) is provided between the inner surface of the retainer (-) and the outer surface of the rod (b). An opening (!1) is provided at the tip (right end in FIG. 1) of the retainer (-).
この従来の装置においてスクリュー（α）を回転すると
、スクリュー（α）によって第１図の左方から右方へ押
し出されて来たプラスチックは溝（Ｃ）へ入り、溝（Ｃ
）から隙間（イ）を通って溝（Ｌｆ）へ入った後、開口
部（、Ｖ）より外に押し出されることになる。In this conventional device, when the screw (α) is rotated, the plastic that has been pushed out from the left to the right in Figure 1 by the screw (α) enters the groove (C).
), passes through the gap (A) and enters the groove (Lf), and then is pushed out through the opening (, V).
そして軟化しただけのプラスチックや未溶融状態のプラ
スチックは、隙間（イ）を通るときに可塑化、混練され
ることに々る。Plastics that are only softened or unmolten are often plasticized and kneaded when passing through the gap (a).
この従来の装置において、可塑化を良くするため隙間（
イ）を狭くし、しかもこの部分の抵抗が大きくならない
ように溝（Ｃ）、（→の数を増すと、溝（Ｃ）、（ｄ）
の中の抵抗が大きくなるた−め・、全体と５してプラス
チックの押出抵抗を下げることが難かしい欠点があった
。In this conventional device, gaps (
In order to narrow A) and to prevent the resistance from increasing in this part, grooves (C) and (by increasing the number of →s, grooves (C) and (d)
Since the resistance inside the plastic becomes large, there is a drawback that it is difficult to lower the extrusion resistance of the plastic as a whole.
また従来装置の他の例としてプラスチックの押出通路中
に孔をあけた円板とスクリーンとを設けたものがあるが
、すりつぶし作用が全く無いので、可塑化を良くするた
めに孔径を小さくすると、未溶融のプラスチックが孔の
前面にたまって高圧を生じたり、プラスチックが過熱す
る欠点があった。Another example of a conventional device is one in which a disk with holes and a screen are provided in the plastic extrusion path, but since there is no grinding effect at all, if the hole diameter is made smaller to improve plasticization, The problem was that unmelted plastic accumulated in front of the hole, creating high pressure and causing the plastic to overheat.
本発明は上述した欠点を除去し、低圧力損失でプラスチ
ックを可塑化、混練することを目的とし、押出機のスク
リュー先端延長軸線上に固定されたロッドと、義蔦°″
％′Ｖ表林該ロッドの外表面に軸線方向に設けられ該ロ
ッドの回転方向の反対側に向って徐々に浅くなる溝と、
前記ロッドの外側に軸線方向に互に間隙をおいて並べら
れた複数のリングと、該リングの内面と前記ロッドの外
表面との間に設けられた間隙と、前記ロッドの先端に形
成され前記並べられたり／グの濃先端のリーング内面に
密に、嵌合された頭部と、を備えたことを特徴とするプ
ラスチック押出機用可塑化混練装置を要旨とするもので
ある。The present invention aims to eliminate the above-mentioned drawbacks and plasticize and knead plastics with low pressure loss.
a groove provided in the outer surface of the rod in the axial direction and gradually becoming shallower toward the opposite side of the rotation direction of the rod;
a plurality of rings arranged on the outside of the rod with gaps between them in the axial direction; a gap provided between the inner surface of the rings and the outer surface of the rod; and a gap formed at the tip of the rod; The object of the present invention is to provide a plasticizing and kneading device for a plastic extruder, which is characterized in that it is equipped with a head that is closely fitted to the inner surface of a ring at the thick tip of a plastic extruder.
次に本発明の一実施例を第３図について説明する。Next, one embodiment of the present invention will be described with reference to FIG.
押出機のスクリュー（１）先端の延長軸線上にはロッド
（２）が一体に固定されていて、図示しない駆動源によ
ってスクリュー（１）およびロッド（２）は第３図の右
方から見て時計方向に回転されるようになっている。ロ
ッドの外表面には、軸線方向に多数の溝（３）が設けて
あって、これらの溝（３）は、第３図、第７図に矢印で
示すロッド（２）の回転方向に対し、その反対側に向っ
て徐々に浅くなっている。ロッド（２）の溝（３）が設
けられている部分よりもさらに先端には、第６図、第６
図に示すように若干大径になっている円柱部（４）と円
錐部（５）とより成る頭部（６）”ｄ（一体に形成され
ている。A rod (2) is integrally fixed on the extended axis of the tip of the screw (1) of the extruder, and the screw (1) and rod (2) are moved by a driving source (not shown) when viewed from the right side of Fig. 3. It is designed to be rotated clockwise. The outer surface of the rod is provided with a large number of grooves (3) in the axial direction, and these grooves (3) are arranged in the direction of rotation of the rod (2) as indicated by the arrows in FIGS. 3 and 7. , it gradually becomes shallower towards the opposite side. At the tip of the rod (2) beyond the groove (3), there are
As shown in the figure, the head (6) is formed integrally with a cylindrical portion (4) having a slightly larger diameter and a conical portion (5).
ロッド（２）の外側には、第３図に示すように多数のリ
ング（７）がロッド（２）の軸線方向に並べて設けられ
て−いる。リング（７）は第８図に水子ように、側面に
高さの低い突起（８）が突設されており、また外面にも
放射方向に突起（９）が突設されている。As shown in FIG. 3, a large number of rings (7) are arranged on the outside of the rod (2) in the axial direction of the rod (2). As shown in FIG. 8, the ring (7) has a protrusion (8) of low height protruding from its side surface, and protrusions (9) protruding from its outer surface in the radial direction.
リング（７）の側面の突起（８）によって、リング（７
）の側面相互間には第３図に示すように間隙α０が形成
され、外面の突起（９）によって、さらに外側にあるリ
テーナα力の内面との間には通路（ハ）（第３図、第４
図、第５図参照）が形成される。またロッド（２）の溝
（３）が設けられている部分の外表面とリング（７）の
内面との間には間隙α３（第３図、第４図参照）が形成
されるが、若干大径になっている頭部（６）の円柱部（
４）は、最先端に並んでいるリング（７）の内面に密に
嵌合した状態で回転するように々っている。The protrusion (8) on the side of the ring (7) allows the ring (7
As shown in Fig. 3, a gap α0 is formed between the sides of the retainer α0, and a passage (c) is formed between the inner surface of the retainer α and the inner surface of the retainer α located further outside by the protrusion (9) on the outer surface. , 4th
(see FIG. 5) is formed. Also, a gap α3 (see Figures 3 and 4) is formed between the outer surface of the portion of the rod (2) where the groove (3) is provided and the inner surface of the ring (7). The cylindrical part of the head (6) which has a large diameter (
4) rotates while tightly fitting into the inner surface of the ring (7) arranged at the leading edge.
上述した装置でスクリュー（わと共にロッド（２）が回
転すると、スクリュー（１）によって第３図の左方から
右方へ押し出されて来たプラスチックは溝（３）の中に
入ることになる。溝（３）の先端は頭部（６）の円柱部
（４）でふさがっているため、溝（３）に入ったプラス
チックはロッド（２）によってすりつぶされながら半径
方向の流れになり、隙間α葎、００を通った後再び軸方
向の流れとなり、通路（６）を通って円錐部（５）の外
表面に沿いながら外部へ押し出される。When the rod (2) rotates with the screw in the above-mentioned device, the plastic pushed out from the left to the right in FIG. 3 by the screw (1) enters the groove (3). Since the tip of the groove (3) is closed by the cylindrical part (4) of the head (6), the plastic that has entered the groove (3) is ground by the rod (2) and flows in the radial direction, filling the gap. After passing through α, 00, the flow becomes axial again, and is pushed out through the passageway (6) and along the outer surface of the conical part (5).
第１図に示した従来のロッド（ｂ）には溝（Ｃ）、（→
が交互に同じ円周上に設けられていたので、それぞれの
溝（Ｃ）、（→は円周長さの半分までしかとれなかった
が、本発明の溝（３）は全てがスクリュー（１）から押
し出されるプラスチックを受は入れるので、従来の２倍
の容量をもつことになって抵抗が小さくなる。そして溝
（３）はロッド（２）の回転方向の反対側に向って徐々
に浅くなっているので、積極的なすシつぶし作用と低圧
力損失を両立させることができる。またリング（７）を
厚さの薄いものにして数を多くすれば間隙００の数も多
くなり、個々の間隙００は小さくても、低圧力の状態を
保ちながらプラスチックをこまかくすることができる。The conventional rod (b) shown in Fig. 1 has a groove (C), (→
were provided alternately on the same circumference, so the respective grooves (C) and (→ could only be taken up to half the circumference length, but the grooves (3) of the present invention were all screwed (1). ) The receptacle receives the plastic extruded from the rod (2), so it has twice the capacity of the conventional one, reducing resistance.The groove (3) gradually becomes shallower toward the opposite side of the rotation direction of the rod (2). This makes it possible to achieve both active crushing action and low pressure loss.Furthermore, if the ring (7) is made thinner and the number is increased, the number of gaps 00 will increase, and the individual Even if the gap 00 is small, it is possible to make the plastic compact while maintaining a low pressure state.
本発明は上述したように、低圧力で発熱しない状態で未
溶融のプラスチックをこまかくすりつぶし、良可塑化状
態にすることができる効果がある。As described above, the present invention has the effect of finely grinding unmolten plastic under low pressure and without generating heat, and bringing it into a well-plasticized state.
第１図は従来装置の一例の縦断側面図、第２図は第１図
のＩｆ−Ｉ線における断面図、第３図は本発明の一実施
例の縦断側面図、第４図は第５図のＩＶ−ＩＶ線におけ
る断面図、第５図は第６図の■方向から見た正面図、第
６図はロッドの側面図、第７図は第６図の■−■線にお
ける断面図、第８図はリングの縦断側面図である。
（１）・・・スクリュー、 （２＞・・・ロッド、 （
３）・・・ｌ、（６）・・・頭部、（７）・・・リング
、αＯ％ａ３・・・間隙。
特許出願人
石川島播磨重工業株式会社
第１図
第３図FIG. 1 is a longitudinal sectional side view of an example of a conventional device, FIG. 2 is a sectional view taken along the If-I line in FIG. 1, FIG. 3 is a longitudinal sectional side view of an embodiment of the present invention, and FIG. 5 is a front view taken from the direction ■ in FIG. 6, FIG. 6 is a side view of the rod, and FIG. 7 is a sectional view taken along the line ■-■ in FIG. 6. , FIG. 8 is a longitudinal sectional side view of the ring. (1)...screw, (2>...rod, (
3)...l, (6)...head, (7)...ring, αO%a3...gap. Patent applicant Ishikawajima Harima Heavy Industries Co., Ltd. Figure 1 Figure 3
Claims (1)
ッドと、該ロッドの外表面に軸線方向に設けられ該ロッ
ドの回転方向の反対側に向って徐々に浅くなる溝と、前
記ロッドの外側に軸線方向に互に間隙をおいて並べられ
た複数のリングと、該リングの内面と前記ロッドの外表
面との間に設けられた間隙と、前記ロッドの先端に形成
され前記釜べられたリングの最先端のリング内面に密に
嵌合された頭部と、を備えたことを特徴とするプラスチ
ック押出機用可塑化混練装置。l) A rod fixed on the extension axis of the screw tip of the extruder, a groove provided in the axial direction on the outer surface of the rod and gradually becoming shallower toward the opposite side of the rotational direction of the rod, and the outer side of the rod. a plurality of rings arranged with gaps between each other in the axial direction; a gap provided between the inner surface of the rings and the outer surface of the rod; A plasticizing and kneading device for a plastic extruder, characterized in that it is equipped with a head that is tightly fitted to the inner surface of the most advanced ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56129211A JPS608212B2 (en) | 1981-08-18 | 1981-08-18 | Plasticizing and kneading equipment for plastic extruder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56129211A JPS608212B2 (en) | 1981-08-18 | 1981-08-18 | Plasticizing and kneading equipment for plastic extruder |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS5831728A true JPS5831728A (en) | 1983-02-24 |
| JPS608212B2 JPS608212B2 (en) | 1985-03-01 |
Family
ID=15003875
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56129211A Expired JPS608212B2 (en) | 1981-08-18 | 1981-08-18 | Plasticizing and kneading equipment for plastic extruder |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS608212B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61290028A (en) * | 1985-06-17 | 1986-12-20 | Ishikawajima Harima Heavy Ind Co Ltd | Plasticizing and kneading equipment for plastic extruding machine |
| WO2005065916A1 (en) * | 2004-01-08 | 2005-07-21 | Ewos Innovation As | Device and method for milling of raw materials in an extrusion process |
-
1981
- 1981-08-18 JP JP56129211A patent/JPS608212B2/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS61290028A (en) * | 1985-06-17 | 1986-12-20 | Ishikawajima Harima Heavy Ind Co Ltd | Plasticizing and kneading equipment for plastic extruding machine |
| WO2005065916A1 (en) * | 2004-01-08 | 2005-07-21 | Ewos Innovation As | Device and method for milling of raw materials in an extrusion process |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS608212B2 (en) | 1985-03-01 |
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