JPH0238383B2 - - Google Patents
Info
- Publication number
- JPH0238383B2 JPH0238383B2 JP59264294A JP26429484A JPH0238383B2 JP H0238383 B2 JPH0238383 B2 JP H0238383B2 JP 59264294 A JP59264294 A JP 59264294A JP 26429484 A JP26429484 A JP 26429484A JP H0238383 B2 JPH0238383 B2 JP H0238383B2
- Authority
- JP
- Japan
- Prior art keywords
- flight
- screw
- sub
- plastic molding
- groove
- 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
- 238000010137 moulding (plastic) Methods 0.000 claims description 12
- 239000000463 material Substances 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 7
- 230000007423 decrease Effects 0.000 claims description 3
- 239000000155 melt Substances 0.000 claims description 3
- 238000011144 upstream manufacturing Methods 0.000 claims 2
- 239000011347 resin Substances 0.000 description 11
- 229920005989 resin Polymers 0.000 description 11
- 238000004898 kneading Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 230000006835 compression Effects 0.000 description 2
- 238000007906 compression Methods 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000010006 flight Effects 0.000 description 2
- 238000001746 injection moulding Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 230000033001 locomotion Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000007790 solid phase Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29B—PREPARATION OR PRETREATMENT OF THE MATERIAL TO BE SHAPED; MAKING GRANULES OR PREFORMS; RECOVERY OF PLASTICS OR OTHER CONSTITUENTS OF WASTE MATERIAL CONTAINING PLASTICS
- B29B7/00—Mixing; Kneading
- B29B7/30—Mixing; Kneading continuous, with mechanical mixing or kneading devices
- B29B7/34—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices
- B29B7/38—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary
- B29B7/40—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft
- B29B7/42—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with single shaft with screw or helix
- B29B7/428—Parts or accessories, e.g. casings, feeding or discharging means
- B29B7/429—Screws
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Description
【発明の詳細な説明】
〔発明の技術分野〕
本発明は、射出成形機、押出機等に用いられる
プラスチツク成形用スクリユに関する。DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a plastic molding screw used in an injection molding machine, an extruder, etc.
プラスチツクの射出成形機用スクリユは、スク
リユの計量後退動作により有効スクリユ長が短く
なる。そのため一般に計量された樹脂のなかでノ
ズル側は比較的樹脂温度が高く、後部で計量され
た樹脂は温度が低くなる傾向がある。
A screw for a plastic injection molding machine has a short effective screw length due to the metering and retracting movement of the screw. Therefore, in general, resin measured at the nozzle side tends to have a relatively high temperature, and resin measured at the rear tends to have a low temperature.
このように樹脂温度が低下すると、一般に混練
不足が発生しやすい。これらの問題は、固体相を
予熱しながら移送するスクリユのフイードゾーン
から、溶融相を形成するコンプレツシヨンゾー
ン、メタリングゾーンに至る間にメルトプールと
ソリツドベツドとが共存して吐出されることによ
り起るものであり、このような問題点を解決する
ためソリツドベツドをメルトプールから分離さ
れ、早期に加熱してメルト化させる手段として、
各種副フライトを有するスクリユ（実公昭53−
96070、同55−18180、特開昭48−59159号公報）
が提案されている。 When the resin temperature decreases in this way, insufficient kneading generally tends to occur. These problems are caused by the coexistence of melt pool and solid bed being discharged from the feed zone of the screw, where the solid phase is transferred while being preheated, to the compression zone, where the molten phase is formed, and the metering zone. In order to solve these problems, the solid bed is separated from the melt pool, and as a means to quickly heat it and melt it.
Skrill with various sub-flights (Jikko 53-
96070, 55-18180, Japanese Unexamined Patent Publication No. 48-59159)
is proposed.
上記従来の副フライトスクリユは、いずれも主
フライトに対し副フライトがリード角を変えて形
成される構造であり、したがつて製作上自動化が
難しく、人手による加工を要し、フライト研削盤
による自動加工が極めて困難であつた。 The above-mentioned conventional sub-flight screws all have a structure in which the sub-flight is formed with a different lead angle from the main flight. Therefore, it is difficult to automate manufacturing, requiring manual processing, and using a flight grinder. Automatic processing was extremely difficult.
本発明は上記の点に鑑み、主フライトに対し副
フライトのリード角を同じにしてスクリユの製作
の容易化を図りながら樹脂の均一可塑化性能、均
一混練性能、および可塑化能力等の向上を図るこ
とができるプラスチツク成形用スクリユを提供す
ることを目的としてなされたものである。
In view of the above points, the present invention aims to improve the uniform plasticization performance, uniform kneading performance, plasticization ability, etc. of the resin by making the lead angle of the sub-flight the same as that of the main flight, thereby facilitating the manufacture of the screw. The purpose of this invention is to provide a screw for plastic molding that can be used in a plastic molding process.
上記目的を達成するため本発明は、フルフライ
トスクリユを構成する主フライトと、この主フラ
イトに平行に形成された副フライトとを有するス
クリユであつて、前記副フライトは、主フライト
と平行な部分と、その開始点および終了点が主フ
ライトにそれぞれほぼ直角に接続され、前記副フ
ライトによつて分割されたスクリユ溝のうち材料
のメルト部分を運ぶ流出側溝および材料の固体部
分を運ぶ流入側溝を塞ぐ堰とで構成され、かつ前
記主フライトと平行な部分の副フライトの高さは
前記主フライトより低く形成されていることを特
徴とするものである。
To achieve the above object, the present invention provides a full-flight screw having a main flight and a sub-flight formed parallel to the main flight, wherein the sub-flight is parallel to the main flight. an outflow groove carrying the melt portion of the material and an inlet groove carrying the solid portion of the material, of the screw grooves, the starting and ending points of which are respectively connected at a substantially right angle to the main flight, and which are divided by said secondary flights; The height of the sub-flight in a portion parallel to the main flight is lower than that of the main flight.
以下、本発明を図面に示す実施例を参照して説
明する。
The present invention will be described below with reference to embodiments shown in the drawings.
本発明にかかるプラスチツク成形用スクリユ１
は、フルフライトスクリユを構成する主フライト
２と、この主フライト２に平行に形成された副フ
ライト３とを有し、副フライト３は、主フライト
２と平行な部分３Ａと、この主フライト２に開始
点および終了点がそれぞれほぼ直角に接続され、
主フライト２と副フライト３とで形成するスクリ
ユ溝のうち、スクリユヘツド側に対し主フライト
２の背面ａに接する材料の固体部分を運ぶ流入側
溝４と、スクリユヘツド側に対し主フライト２の
前面ｂに接するメルト部分を運ぶ流出側溝５とを
塞ぐ堰３Ｂとで構成されている。 Plastic molding screw 1 according to the present invention
has a main flight 2 constituting a full-flight screw, and a sub-flight 3 formed parallel to this main flight 2. 2, the start point and end point are connected at almost right angles,
Of the screw grooves formed by the main flight 2 and the sub-flight 3, there is an inflow side groove 4 that carries the solid part of the material that is in contact with the back surface a of the main flight 2 toward the screw head side, and an inlet groove 4 that carries the solid part of the material that is in contact with the back surface a of the main flight 2 toward the screw head side. It is composed of an outflow side groove 5 that carries the contacting melt portion, and a weir 3B that closes off the outflow side groove 5.
そして、第２図または第３図の断面―の拡
大図に示すように、副フライト３の両側部分がス
クリユ１の谷径から接線方向（第２図）、あるい
は大きな曲率Ｒ（Ｒはといし車の半径）で切上げ、
切下げ形状に形成されており、該部分３Ｂの加工
の容易性に加え、同時に樹脂の滞溜の防止を図
り、色替、樹脂替性能の向上が図られている。 As shown in the enlarged cross-sectional view of FIG. 2 or FIG. radius of the car), rounded up,
It is formed in a cut-down shape, which not only facilitates processing of the portion 3B, but also prevents resin from accumulating and improves color change and resin change performance.
なお、副フライト３により分割されたスクリユ
溝の流入側溝４の溝深さは前記副フライト３の開
始点乃至はこれより下流の任意の位置から下流側
に向け漸減されており、材料樹脂の如何によつて
は、第５図の断面―図で示すように、前記堰
３Ｂ部分の頂部でその高さと一致されている。 Note that the groove depth of the inlet side groove 4 of the screw groove divided by the sub-flight 3 gradually decreases toward the downstream from the starting point of the sub-flight 3 or any position downstream from this, depending on the material resin. In some cases, as shown in the cross-sectional view of FIG. 5, the height of the weir 3B matches the top of the weir 3B.
また副フライト３の高さは、第６図に示すよう
に下流側に向け漸増させ、すなわちバレル６の内
面と副フライト３との間に形成される隙間が副フ
ライト３の起点と終点とでは起点における隙間δ1
が終点における隙間δ2に対しδ1＞δ2となるように
し、材料樹脂の固体部分は下流へ行くにしたがつ
てメルト化しないものは流出側溝５へは流入しに
くくして分散がよく行なわれるようにしている。 Further, the height of the secondary flight 3 is gradually increased toward the downstream side as shown in FIG. Gap at the starting point δ 1
is set so that δ 1 > δ 2 with respect to the gap δ 2 at the end point, and as the solid portion of the material resin goes downstream, it becomes difficult for those that do not melt to flow into the outflow side groove 5, so that good dispersion is achieved. I'm trying to make it happen.
さらに副フライト３は、スクリユ１のメタリン
グゾーン、コンプレツシヨンゾーン、フイードゾ
ーンのいずれか一つまたは複数ゾーンにおよそ１
リード程度設けることができる。 Furthermore, the sub-flight 3 is located approximately 1 minute into one or more of the metering zone, compression zone, and feed zone of the screw 1.
A lead can be provided.
以上説明したように、本発明は、フルフライト
スクリユを構成する主フライトと、この主フライ
トにそつて副フライトを有するプラスチツク成形
用スクリユにおいて、上記副フライトが主フライ
トに対し平行に形成されているので、スクリユの
製造を自動フライト研削盤を用いて行なうことが
でき、その製造を能率的に安価に得ることができ
る。また副フライトに主フライトに対しほぼ直交
する方法の部分を設けるとともに副フライトの主
フライトに平行する部分の高さが主フライトより
低く形成されているので、樹脂の混練性能や樹脂
温度の均一化が図れ、顔料の分散性に優れ、かつ
副フライトを有していても色替性、樹脂替性を損
なうこともないなどの種々の効果がある。
As explained above, the present invention provides a screw for plastic molding having a main flight constituting a full-flight screw and a sub-flight along the main flight, in which the sub-flight is formed parallel to the main flight. Therefore, the screw can be manufactured using an automatic flight grinder, and the manufacturing process can be performed efficiently and at low cost. In addition, the sub-flight has a part that is almost perpendicular to the main flight, and the height of the part of the sub-flight that is parallel to the main flight is lower than that of the main flight, which improves resin kneading performance and uniform resin temperature. It has various effects such as excellent pigment dispersibility, and even if it has secondary flights, color changeability and resin changeability are not impaired.
第１図は本発明によるプラスチツク成形用スク
リユの基本的実施例の一つを示す一部の正面図、
第２図は第１図―線拡大断面図、第３図は他
の実施例を示すもので、溝の底面が大きな曲率と
なつている場合の第２図相当図、第４図は第１図
の展開図、第５図は第４図―線拡大断面図、
第６図はさらに他の実施例を示し、副フライトの
高さを起点から終点にかけて大きくして行く場合
の例示図である。
１…スクリユ、２…主フライト、３…副フライ
ト、３Ａ…平行な部分、３Ｂ…堰、４…流入側
溝、５…流出側溝。
FIG. 1 is a partial front view showing one of the basic embodiments of the plastic molding screw according to the present invention;
Fig. 2 is an enlarged cross-sectional view taken along the lines of Fig. 1, Fig. 3 shows another embodiment, and is a view equivalent to Fig. 2 when the bottom surface of the groove has a large curvature. Developed view of the figure, Figure 5 is an enlarged sectional view of Figure 4,
FIG. 6 shows still another embodiment, and is an illustrative diagram in which the height of the sub-flight increases from the starting point to the ending point. 1...Screw, 2...Main flight, 3...Sub-flight, 3A...Parallel portion, 3B...Weir, 4...Inlet side groove, 5...Outlet side groove.
Claims (1)
と、この主フライトに平行に形成された副フライ
トとを有するスクリユであつて、前記副フライト
は、主フライトと平行な部分と、その開始点およ
び終了点が主フライトにそれぞれほぼ直角に接続
され、前記副フライトによつて分割されたスクリ
ユ溝のうち材料のメルト部分を運ぶ流出側溝およ
び材料の固体部分を運ぶ流入側溝を塞ぐ堰とで構
成され、かつ前記主フライトと平行な部分の副フ
ライトの高さは前記主フライトより低く形成され
ていることを特徴とするプラスチツク成形用スク
リユ。 ２ 前記流入側溝深さが、前記副フライトの開始
点乃至はこれより下流の任意の位置から下流側に
向け漸減することを特徴とする特許請求の範囲第
１項記載のプラスチツク成形用スクリユ。 ３ 前記流入側溝深さが、前記副フライトの堰部
分の頂部でその高さと一致していることを特徴と
する特許請求の範囲第２項記載のプラスチツク成
形用スクリユ。 ４ 前記副フライトの堰に隣接する溝部底面の形
状が、その上流側および下流側の少なくとも一方
において副フライトの頂面の一端を通りかつスク
リユ溝の底面外径円に接する直線であることを特
徴とする特許請求の範囲第１項または第２項記載
のプラスチツク成形用スクリユ。 ５ 前記堰に隣接する溝部底面の形状が、その上
流側および下流側の少なくとも一方において副フ
ライトの頂面の一端を通りかつスクリユ溝の底面
外径円に外接する円弧であることを特徴とする特
許請求の範囲第１項または第２項記載のプラスチ
ツク成形用スクリユ。 ６ 前記副フライトは、その高さが下流側に向け
漸増することを特徴とする特許請求の範囲第１項
乃至第５項のいずれか１項に記載のプラスチツク
成形用スクリユ。[Scope of Claims] 1. A screw having a main flight constituting a full-flight screw, and a sub-flight formed parallel to the main flight, wherein the sub-flight has a portion parallel to the main flight, A weir whose starting point and end point are connected to the main flight at a substantially right angle, respectively, and which closes the outflow side groove carrying the melt part of the material and the inflow side groove carrying the solid part of the material among the screw grooves divided by the sub-flights. 1. A screw for plastic molding, characterized in that the height of the sub-flight in a portion parallel to the main flight is lower than that of the main flight. 2. The screw for plastic molding according to claim 1, wherein the depth of the inflow side groove gradually decreases toward the downstream side from the starting point of the sub-flight or any position downstream thereof. 3. The screw for plastic molding according to claim 2, wherein the depth of the inflow side groove matches the height of the weir portion of the sub-flight at the top thereof. 4. The shape of the bottom surface of the groove adjacent to the weir of the secondary flight is a straight line that passes through one end of the top surface of the secondary flight on at least one of its upstream and downstream sides and is in contact with the outer diameter circle of the bottom surface of the screw groove. A screw for plastic molding according to claim 1 or 2. 5. The shape of the bottom surface of the groove adjacent to the weir is an arc that passes through one end of the top surface of the sub-flight on at least one of its upstream and downstream sides and circumscribes the outer diameter circle of the bottom surface of the screw groove. A screw for plastic molding according to claim 1 or 2. 6. The screw for plastic molding according to any one of claims 1 to 5, wherein the height of the secondary flight gradually increases toward the downstream side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59264294A JPS61141512A (en) | 1984-12-14 | 1984-12-14 | Screw for molding plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59264294A JPS61141512A (en) | 1984-12-14 | 1984-12-14 | Screw for molding plastic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61141512A JPS61141512A (en) | 1986-06-28 |
| JPH0238383B2 true JPH0238383B2 (en) | 1990-08-30 |
Family
ID=17401167
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59264294A Granted JPS61141512A (en) | 1984-12-14 | 1984-12-14 | Screw for molding plastic |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61141512A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5064293A (en) * | 1990-12-28 | 1991-11-12 | Kensaku Nakamura | Rotary kneading screw |
| US6017145A (en) * | 1994-12-30 | 2000-01-25 | The Dow Chemical Company | Extruder screw |
| JP6473098B2 (en) * | 2016-04-20 | 2019-02-20 | 東京インキ株式会社 | Screw for kneading and single screw extruder |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5780037A (en) * | 1980-11-05 | 1982-05-19 | Mitsubishi Heavy Ind Ltd | High degree kneading type screw |
| JPS5817122B2 (en) * | 1973-10-19 | 1983-04-05 | シエル インタ−ナシヨネイル リサ−チ マ−チヤツピイ ベ− ウイ | Goseiga no Seihou |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5817122U (en) * | 1981-07-25 | 1983-02-02 | 三菱重工業株式会社 | Skrill |
-
1984
- 1984-12-14 JP JP59264294A patent/JPS61141512A/en active Granted
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5817122B2 (en) * | 1973-10-19 | 1983-04-05 | シエル インタ−ナシヨネイル リサ−チ マ−チヤツピイ ベ− ウイ | Goseiga no Seihou |
| JPS5780037A (en) * | 1980-11-05 | 1982-05-19 | Mitsubishi Heavy Ind Ltd | High degree kneading type screw |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61141512A (en) | 1986-06-28 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |