JPH11170249A - Mixing screw for plastic - Google Patents
Mixing screw for plasticInfo
- Publication number
- JPH11170249A JPH11170249A JP9362021A JP36202197A JPH11170249A JP H11170249 A JPH11170249 A JP H11170249A JP 9362021 A JP9362021 A JP 9362021A JP 36202197 A JP36202197 A JP 36202197A JP H11170249 A JPH11170249 A JP H11170249A
- Authority
- JP
- Japan
- Prior art keywords
- groove
- screw
- dispersion ring
- stage dispersion
- ring
- 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
- B29C48/67—Screws having incorporated mixing devices not provided for in groups B29C48/52 - B29C48/66
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明はプラスチック用ミキシン
グスクリュに関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mixing screw for plastics.
【０００２】[0002]
【従来技術】従来からスクリュによりプラスチック材料
を送る際の混練や顔料の分散性等の向上を目的として図
５に示すようにスクリュ１の一部に形成された大径のプ
ランジャ２の外周面に一端が解放され、他端が先止まり
条溝３を夫々連通しないように３ａ、３ｂとして交互に
逆方向に配置してデイスパージョンリング４としたプラ
スチック用ミキシングスクリュが周知である。2. Description of the Prior Art Conventionally, as shown in FIG. 5, a large-diameter plunger 2 formed on a part of a screw 1 is formed on a peripheral surface of a large-diameter plunger 2 for the purpose of improving kneading and dispersibility of a pigment when a plastic material is fed by a screw. Mixing screws for plastics which are alternately arranged in the opposite direction as 3a and 3b so as to be open at one end and stop at the other end so that the groove 3 does not communicate with each other to form a dispersion ring 4 are well known.
【０００３】さらに混練や顔料の分散性等をより効率良
くするため、図６に示すような溝５を隔てて１段目デイ
スパージョンリング６および２段目デイスパージョンリ
ング７を直列に並べたミキシングスクリュ８も周知とな
っている。In order to further improve kneading and pigment dispersibility, a first-stage dispersion ring 6 and a second-stage dispersion ring 7 are arranged in series with a groove 5 as shown in FIG. Mixing screw 8 is also well known.
【０００４】[0004]
【発明が解決しょうとする課題】前述のように図５およ
び図６のような構成のスクリュとすることにより樹脂材
料を送る際の混練や顔料の分散等を向上させることがで
きるものの、図６のような２段構成のデイスパージョン
リングのスクリュであってもAs described above, the screw having the structure shown in FIGS. 5 and 6 can improve the kneading and the dispersion of the pigment when the resin material is fed. Even if it is a screw with a two-stage dispersion ring like
【０００５】[0005]
【表１】 [Table 1]
【０００６】に示すように顔料１に対して樹脂材料７９
（以下８０倍樹脂）の顔料の分散テストではその分散
性、特に５Kg/cm 2 のような低背圧における分散性は不
十分で均一性が達成できなかった。[0006] As shown in FIG.
In the dispersion test of the pigment (hereinafter referred to as 80 times resin), the dispersibility thereof, particularly at a low back pressure such as 5 kg / cm 2 , was insufficient and uniformity could not be achieved.
【０００７】これは図７で示すように溶融樹脂は矢印Ａ
のようにデイスパージョンリング６の一端の解放部９か
ら条溝６ａに入り、先端の先止まり部で塞き止められる
と、堤１０を乗越え、隣の下流部が解放されている条溝
６ｂに入り、その解放部１１から溝５を経て２段目のデ
イスパージョンリング７の一端の解放部１２から条溝７
ａに入り，次いで条溝７ｂから解放部１３を経てデイス
パージョンリング６および７を通過するようになってい
て、溶融樹脂がデイスパージョンリング６からデイスパ
ージョンリング７に入る際、流れを変化させることがな
いので、混練や顔料の分散等が悪いと推定される。[0007] As shown in FIG.
When the groove 6a enters the groove 6a from the release portion 9 at one end of the dispersion ring 6 and is blocked by the front end stop, the groove 6b climbs over the bank 10 and the adjacent downstream portion is released. From the release portion 11 through the groove 5 to the release portion 12 at one end of the second-stage dispersion ring 7.
a, and then passes through the dispersion rings 6 and 7 from the groove 7b through the release portion 13, and when the molten resin enters the dispersion ring 7 from the dispersion ring 6, Since it is not changed, it is estimated that kneading and dispersion of the pigment are poor.
【０００８】本発明の目的は前述のような欠点を解消
し、溶融樹脂が１段目のデイスパージョンリングから２
段目のデイスパージョンリングに入る際、流れを変化さ
せ、混練や顔料の分散等が良くなるプラスチック用ミキ
シングスクリュを提供することにある。[0008] An object of the present invention is to solve the above-mentioned drawbacks and to reduce the molten resin from the first-stage dispersion ring to the second stage.
An object of the present invention is to provide a mixing screw for plastics in which the flow is changed at the time of entering the second stage dispersion ring to improve kneading and dispersion of the pigment.
【０００９】[0009]
【課題を解決するための手段】前述の目的を達成するた
め本発明はスクリュに加熱バレル内径面との間に小間隙
を形成するプランジャ部を設け、このプランジャの外周
面に一端が解放され、他端が先止まりの条溝を夫々連通
しないように交互に逆方向に配置して１段目デイスパー
ジョンリングとするとともに、溝を隔ててスクリュ先端
側である下流に条溝が前記１段目デイスパージョンリン
グより多い条溝の２段目ディスパージョンリングを設け
たことを特徴とするプラスチック用ミキシングスクリュ
とした。According to the present invention, in order to achieve the above-mentioned object, a screw is provided with a plunger portion for forming a small gap between the screw and an inner diameter surface of a heating barrel, and one end of the plunger is opened on an outer peripheral surface of the plunger. A first-stage dispersion ring is alternately arranged in the opposite direction so that the other end does not communicate with the first-stopped groove, and the first-stage groove is located downstream of the screw tip side across the groove. A mixing screw for plastics, comprising a second-stage dispersion ring having more grooves than the first dispersion ring.
【００１０】また前記２段目ディスパージョンリングは
条溝の捩じれ方向が前記１段目ディスパージョンリング
のそれと逆向きであるとともに、条溝の他端が前方に貫
通しており、かつスクリュ軸方向の幅が１段目ディスパ
ージョンリング幅より狭いことを特徴とするプラスチッ
ク用ミキシングスクリュとした。In the second-stage dispersion ring, the direction of twist of the groove is opposite to that of the first-stage dispersion ring, and the other end of the groove is penetrated forward and in the screw axial direction. Is smaller than the width of the first-stage dispersion ring.
【００１１】[0011]
【発明の実施の形態】次に本発明の実施形態を図１およ
び図２により説明する。スクリュ２０には１段目ディス
パージョンリング２１と２段目ディスパージョンリング
２２が溝２３を隔てて直列に設けてあり、前者には従来
と同じく一端が解放され、他端が先止まりの条溝２４を
夫々連通しないように２４ａ、２４ｂとして交互に逆方
向に配置し、後者には１段目ディスパージョンリング２
１の条溝２４より多条で一端が解放され、他端が先止ま
りの条溝２５を夫々連通しないように２５ａ、２５ｂと
して交互に逆方向に配置してある．DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, an embodiment of the present invention will be described with reference to FIGS. A first-stage dispersion ring 21 and a second-stage dispersion ring 22 are provided in series on a screw 20 with a groove 23 therebetween. 24 are alternately arranged in the opposite direction as 24a and 24b so as not to communicate with each other.
One end of the groove 24 is open and the other end is alternately arranged in the opposite direction as 25a and 25b so that the other end does not communicate with the stop groove 25.
【００１２】このように構成されているので、溶融樹脂
は図２の矢印Ｂに示すように１段目デイスパージョンリ
ング２１の一端の解放部２６から条溝２４ａに入り、先
端の先止まり部で塞き止められると、堤２７を乗越え、
隣の下流部が解放されている条溝２４ｂに入り、その解
放部２８から溝２３を経て２段目デイスパージョンリン
グ２２の条溝２５に入ることになるが、この条溝２５は
前述のように１段目デイスパージョンリング２１の条溝
２４より多い条溝となっており、条溝２４ｂの解放部２
８は２段目デイスパージョンリング２２の条溝２５の解
放部と対向していないので、前記解放部２８から吐出さ
れた溶融樹脂は流れを変えずに２段目デイスパージョン
リング２２の条溝２５に入ることができないようにして
ある。With this configuration, the molten resin enters the groove 24a from the release portion 26 at one end of the first-stage dispersion ring 21 as shown by the arrow B in FIG. When it is blocked by
The adjacent downstream portion enters the released groove 24b, and enters the groove 25 of the second-stage dispersion ring 22 from the release portion 28 via the groove 23. The groove 25 is formed as described above. Thus, the number of grooves is greater than the number of grooves 24 of the first-stage dispersion ring 21, and the release portion 2 of the groove 24 b is formed.
8 is not opposed to the open portion of the groove 25 of the second-stage dispersion ring 22, the molten resin discharged from the open portion 28 does not change its flow, and the molten resin discharged from the second-stage dispersion ring 22 has the same shape. The groove 25 is not allowed to enter.
【００１３】従って条溝２４ｂの解放部２８から吐出さ
れた溶融樹脂は２段目デイスパージョンリング２２の１
個の条溝２５ａばかりでなく、先隣の条溝２５ａａにも
入るようになっていて、溶融樹脂は流れを細分化するた
め、混練や顔料の分散等が良くなる。Therefore, the molten resin discharged from the release portion 28 of the groove 24b is supplied to the first stage
Not only the individual grooves 25a but also the adjacent grooves 25aa are provided, and the molten resin divides the flow, so that kneading and dispersion of the pigment are improved.
【００１４】図３および図４により本発明の他の実施形
態を説明すると、スクリュ３０には１段目ディスパージ
ョンリング３１と２段目ディスパージョンリング３２が
溝３３をへだてて直列に設けてあり、前者には従来と同
じく一端が解放され、他端が先止まりの条溝３４を夫々
連通しないように３４ａ、３４ｂとして交互に逆方向に
配置し、後者には条溝の捩じれ方向が前記１段目ディス
パージョンリング３１のそれより多く、捩じれ方向が逆
向きの条溝３５が設けてある。Referring to FIGS. 3 and 4, another embodiment of the present invention will be described. A screw 30 has a first-stage dispersion ring 31 and a second-stage dispersion ring 32 which are provided in series with a groove 33 extending therefrom. In the former, one end is opened as in the conventional case, and the other end is alternately arranged as 34a and 34b so as not to communicate with the leading groove 34, respectively. A groove 35 whose twisting direction is opposite to that of the step dispersion ring 31 is provided.
【００１５】この条溝３５は溶融樹脂を逆流させるた
め、先止部を設けると下流に流れない恐れがあるため下
流側に貫通しているばかりでなく、流動抵抗を少なくす
るためスクリュ軸方向の２段目ディスパージョンリング
幅Ｌ2 が１段目ディスパージョンリング幅Ｌ1 より狭く
してある。The groove 35 reverses the molten resin, and if a leading end is provided, the groove 35 may not flow downstream. Therefore, the groove 35 not only penetrates downstream but also flows in the axial direction of the screw to reduce flow resistance. 2-stage dispersion ring width L 2 are are narrower than the first stage dispersion ring width L 1.
【００１６】以上のような構成となっているため、図４
に示すように溶融樹脂は矢印Ｃのように１段目ディスパ
ージョンリングの条溝３４ａから隣の条溝３４ｂを経
て、解放部３６から流出し、２段目ディスパージョンリ
ング３２の条溝３５に入るに際し、条溝３５は１段目デ
ィスパージョンリングの条溝３４より多く、従って溝幅
は狭く、条溝３４ｂの解放部３６に１以上の条溝３５が
対向しているので、解放部３６から流出した溶融樹脂が
全部条溝３５ａに流れず、３５ｂ或いは３５ｃにも入
り、細分化されて混練や顔料の分散等が良くなる。With the above configuration, FIG.
As shown by arrow C, the molten resin flows out of the release portion 36 from the groove 34a of the first-stage dispersion ring through the adjacent groove 34b as shown by the arrow C, and flows into the groove 35 of the second-stage dispersion ring 32. At the time of entry, the groove 35 is larger than the groove 34 of the first-stage dispersion ring, and therefore the groove width is narrow, and since the one or more grooves 35 face the release part 36 of the groove 34b, the release part 36 is formed. All of the molten resin flowing out of the groove 35a does not flow into the groove 35a, but also enters the groove 35b or 35c, and is finely divided to improve kneading and dispersion of the pigment.
【００１７】本発明の１実施形態と他の実施形態および
図６に示す従来のスクリュにおける顔料の分散テストの
結果は表１に示すように従来スクリュで分散性の悪かっ
た低背圧であっても良くなっており、分散性が改善され
ている。As shown in Table 1, the results of the pigment dispersion test in one embodiment and another embodiment of the present invention and the conventional screw shown in FIG. And the dispersibility has been improved.
【００１８】[0018]
【発明の効果】以上説明したように本発明のスクリュは
従来スクリュと比べ混練や顔料の分散性が改善された。As described above, the screw of the present invention has improved kneading and pigment dispersibility as compared with the conventional screw.
【図１】本発明のプラスチック用ミキシングスクリュの
１実施形態図。FIG. 1 is a view showing one embodiment of a mixing screw for plastics of the present invention.
【図２】本発明のスクリュにおける樹脂の流れを説明し
た図。FIG. 2 is a view for explaining the flow of resin in the screw of the present invention.
【図３】本発明の他の実施形態図。FIG. 3 is a view of another embodiment of the present invention.
【図４】図３における樹脂の流れを説明した図。FIG. 4 is a view for explaining the flow of resin in FIG. 3;
【図５】従来スクリュの説明図。FIG. 5 is an explanatory view of a conventional screw.
【図６】他の従来スクリュの説明図。FIG. 6 is an explanatory view of another conventional screw.
【図７】図６における樹脂の流れを説明した図。FIG. 7 is a view for explaining the flow of the resin in FIG. 6;
２０、３０ スクリュ ２１、３１ １段目ディスパージョンリング ２２、３２ ２段目ディスパージョンリング ２３、３３ 溝 ２４、２５、３４、３５ 条溝 ２６、２８ ，３６ 解放部 ２７ 堤 20, 30 Screw 21, 31 First-stage dispersion ring 22, 32 Second-stage dispersion ring 23, 33 Groove 24, 25, 34, 35 Groove 26, 28, 36 Opening portion 27 Embankment
Claims (2)
間隙を形成するプランジャ部を設け、このプランジャの
外周面に一端が解放され、他端が先止まりの条溝を夫々
連通しないように交互に逆方向に配置して１段目デイス
パージョンリングとするとともに、溝を隔ててスクリュ
先端側である下流に条溝が前記１段目デイスパージョン
リングより多い条溝の２段目ディスパージョンリングを
設けたことを特徴とするプラスチック用ミキシングスク
リュ。1. A screw having a plunger portion for forming a small gap between the screw and the inner diameter surface of the heating barrel so that one end is opened to the outer peripheral surface of the plunger and the other end does not communicate with the pre-stop groove. The first-stage dispersion ring is alternately arranged in the opposite direction to form the first-stage dispersion ring, and the second-stage dispersion of the groove is larger than that of the first-stage dispersion ring at the downstream of the screw tip side across the groove. A mixing screw for plastics characterized by having a John ring.
の捩じれ方向が前記１段目ディスパージョンリングのそ
れと逆向きであるとともに、条溝の他端が下流側に貫通
しており、かつスクリュ軸方向の幅が１段目ディスパー
ジョンリング幅より狭いことを特徴とする請求項１記載
のプラスチック用ミキシングスクリュ。2. The two-stage dispersion ring has a groove in which the twist direction is opposite to that of the first-stage dispersion ring, the other end of the groove penetrates downstream, and a screw shaft. The mixing screw for plastics according to claim 1, wherein the width in the direction is smaller than the width of the first stage dispersion ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36202197A JP3680901B2 (en) | 1997-12-11 | 1997-12-11 | Plastic mixing screw |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP36202197A JP3680901B2 (en) | 1997-12-11 | 1997-12-11 | Plastic mixing screw |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH11170249A true JPH11170249A (en) | 1999-06-29 |
| JP3680901B2 JP3680901B2 (en) | 2005-08-10 |
Family
ID=18475644
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP36202197A Expired - Fee Related JP3680901B2 (en) | 1997-12-11 | 1997-12-11 | Plastic mixing screw |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3680901B2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6108792A (en) * | 1988-09-06 | 2000-08-22 | Seiko Epson Corporation | Article for providing continuity of operation in a computer |
| JP2014000757A (en) * | 2012-06-20 | 2014-01-09 | Sekisui Chem Co Ltd | Screw for extruder |
-
1997
- 1997-12-11 JP JP36202197A patent/JP3680901B2/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6108792A (en) * | 1988-09-06 | 2000-08-22 | Seiko Epson Corporation | Article for providing continuity of operation in a computer |
| JP2014000757A (en) * | 2012-06-20 | 2014-01-09 | Sekisui Chem Co Ltd | Screw for extruder |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3680901B2 (en) | 2005-08-10 |
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