JPH035285B2 - - Google Patents
Info
- Publication number
- JPH035285B2 JPH035285B2 JP59264295A JP26429584A JPH035285B2 JP H035285 B2 JPH035285 B2 JP H035285B2 JP 59264295 A JP59264295 A JP 59264295A JP 26429584 A JP26429584 A JP 26429584A JP H035285 B2 JPH035285 B2 JP H035285B2
- Authority
- JP
- Japan
- Prior art keywords
- flight
- screw
- sub
- main
- parallel
- 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 10
- 238000011144 upstream manufacturing Methods 0.000 claims description 3
- 230000010006 flight Effects 0.000 claims 1
- 239000011347 resin Substances 0.000 description 9
- 229920005989 resin Polymers 0.000 description 9
- 238000004898 kneading Methods 0.000 description 8
- 239000000155 melt Substances 0.000 description 5
- 239000007787 solid Substances 0.000 description 4
- 239000006185 dispersion Substances 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
- 238000001746 injection moulding Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000007423 decrease Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001771 impaired effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 239000012071 phase Substances 0.000 description 1
- 239000000049 pigment Substances 0.000 description 1
- 239000011343 solid material 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
-
- 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
- B29C48/59—Screws characterised by details of the thread, i.e. the shape of a single thread of the material-feeding screw
- B29C48/605—Screws characterised by details of the thread, i.e. the shape of a single thread of the material-feeding screw the thread being discontinuous
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
- Injection Moulding Of Plastics Or The Like (AREA)
- Extrusion Moulding Of Plastics Or The Like (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
せ、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 heated early to 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、副フライトにより分割さ
れたスクリユ溝のうちスクリユヘツドに対し主フ
ライトの背面に接する材料の固体部分を運ぶ流入
側溝と主フライトの前面に接する材料の溶融部分
を運ぶ流出側溝を設け、固体材料と溶融材料とを
別々に運び、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-mentioned points, the present invention aims to facilitate the manufacture of the screw by making the lead angle of the secondary flight the same as that of the main flight, and to make the screw groove divided by the secondary flight on the back side of the main flight with respect to the screw head. An inlet groove carrying the solid part of the material in contact with the main flight and an outlet groove carrying the molten part of the material in contact with the front side of the main flight are provided to carry the solid material and the molten material separately, thereby improving the uniform plasticizing performance, uniform kneading performance, and The object of this invention is to provide a screw for plastic molding that can improve plasticizing ability and the like.
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、複数個設け
られた主フライトと平行な部分と、その隣接する
終了点と開始点とが連結されたスクリユ軸に平行
な部分とからなり、全体として階段状に構成され
るとともにこの副フライトの開始点が主フライト
と非接触でかつ終了点は主フライトにほぼ直角に
連結され、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。
In order to achieve the above object, the present invention provides a screw having a main flight constituting a full-flight screw and a sub-flight formed in parallel to the main flight, wherein a plurality of the sub-flights are provided. It consists of a part parallel to the main flight, and a part parallel to the screw axis where the adjacent end point and start point are connected, and the overall structure is stepped, and the starting point of this sub flight is the main flight. It is characterized in that it is non-contact and the end point is connected to the main flight at a substantially right angle, and the height of the sub-flight is formed lower than 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、複数個設け
られ主フライト２と平行な部分３Ａと、この主フ
ライト２に平行な部分３Ａが相隣れる同上の終了
点と開始点とを連結するスクリユ軸に平行な部分
３Ｂとで構成され、第２図に展開図として示すよ
うに全体として階段状をなし、主フライト２によ
り形成されるスクリユ溝４を流入側溝５と流出側
溝６に分割している。そしてスクリユ軸に平行な
部分３Ｂは、第３図または第４図に拡大断面とし
て示すように、その隣接する溝部底面が上流側あ
るいは下流側の少なくとも一側が副フライト頂面
の一端を通りスクリユ溝の底面外径円に接する直
線ａまたはスクリユ溝の底面外径円に外接する大
きな曲率Ｒ（Ｒはといし車の半径）で切上げ、切
下げ形成に形成されており、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。 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 the main flight 2. A plurality of sub-flights 3 are provided, and a portion 3A parallel to the main flight 2 and a sub-flight 3 are provided. , consists of a part 3A parallel to the main flight 2 and a part 3B parallel to the screw axis connecting the end point and start point of the same as above, and as a whole is a staircase as shown in the exploded view in Fig. 2. The screw groove 4 formed by the main flight 2 is divided into an inlet groove 5 and an outlet groove 6. In the portion 3B parallel to the screw axis, as shown in an enlarged cross section in FIG. The part 3B is formed to be rounded up or down with a straight line a that is in contact with the outer diameter circle of the bottom surface or a large curvature R (R is the radius of the grinding wheel) that is circumscribed with the outer diameter circle of the bottom surface of the screw groove, making it easy to process the part 3B. In addition to improving performance, it also prevents resin from accumulating.
Efforts are being made to improve color change and resin change performance.
そして副フライト３の高さは、第５図に示すよ
うに主フライト２よりδだけ低く形成されてい
る。なおこのδは、第５図示のように一定とする
ほか、第６図示のように上流側から下流側にかけ
て漸減するテーパー状とすることにより、均一可
塑化、均一混練、均一分散性能の向上、および可
塑化能力の向上を図ることができる。 The height of the sub-flight 3 is set lower than the main flight 2 by δ, as shown in FIG. In addition to making this δ constant as shown in Figure 5, by making it tapered gradually from the upstream side to the downstream side as shown in Figure 6, uniform plasticization, uniform kneading, and uniform dispersion performance can be improved. and the plasticizing ability can be improved.
この実施例によれば、メルトプールはスクリユ
溝４および流入側溝５より流出側溝６にスムーズ
に流れ、ソリツドベツドとメルトプールとの分離
が溶融に合わせてスムーズに行なえ、一層均一可
塑化、均一混練、均一分散性能の向上を図ること
ができ、併せて可塑化能力の一層の向上を図るこ
とができる。 According to this embodiment, the melt pool flows smoothly from the screw groove 4 and the inflow side groove 5 to the outflow side groove 6, and the solid bed and the melt pool can be smoothly separated as they melt, resulting in more uniform plasticization, uniform kneading, and Uniform dispersion performance can be improved, and at the same time, plasticizing ability can be further improved.
上記の実施例の場合において、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
たは複数ゾーンに設けられる。 In the case of the above embodiment, secondary flight 3
is provided in one or more of the metering zone, compression zone, and feed zone of the screw 1.
以上説明したように、本発明は、フルフライト
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
副フライトにスクリユ軸に平行な部分を設けると
ともに副フライトのスクリユ軸に平行する部分の
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がない。さらに副
フライトの開始点が主フライトに非接触とされて
いるので、メルトプールの流れをスムーズにし、
終了点は主フライトに連結されているので、メル
トプールが滞留して混練が促進され、また、スク
リユ溝の流入側部分の溝深さは副フライトのスク
リユ軸と平行する部分で高さが一致しているの
で、堰の効果を増大させることができ、したがつ
て、これらにより樹脂の均一可塑化、均一混練、
均一分散性能を著しく高め、可塑化能力の高いス
クリユとすることができる。
As explained above, the present invention provides a plastic molding screw having a main flight constituting a full flight and a sub-flight along the main flight, in which the sub-flight is formed parallel to the main flight. , the screw can be manufactured using an automatic flight grinder, and can be manufactured efficiently and inexpensively. In addition, the secondary flight is provided with a portion parallel to the screw axis, and the height of the portion of the secondary flight parallel to the screw axis is formed to be lower than the main flight.
The kneading performance of the resin and the resin temperature can be made uniform, the dispersibility of the pigment is excellent, and the color changeability and resin changeability are not impaired even if there are sub-flights. Furthermore, since the starting point of the secondary flight is not in contact with the main flight, the flow of the melt pool is smoothed.
Since the end point is connected to the main flight, the melt pool stays there to promote kneading, and the groove depth on the inlet side of the screw groove is equal in height to the part parallel to the screw axis of the secondary flight. As a result, the effect of the weir can be increased, resulting in uniform plasticization, uniform kneading, and uniform kneading of the resin.
It can significantly improve uniform dispersion performance and produce a screw with high plasticizing ability.
第１図は本発明によるプラスチツク成形用スク
リユの一実施例の一部の正面図、第２図は同展開
図、第３図は第１図−線断面図、第４図は同
変形例を示す第３図相当図、第５図は第２図の
−線断面図、第６図は同変形例を示す第５図相
当図である。
１……スクリユ、２……主フライト、３……副
フライト、３Ａ……主フライトに平行な部分、３
Ｂ……スクリユ軸に平行な部分。
Fig. 1 is a front view of a part of an embodiment of the screw for plastic molding according to the present invention, Fig. 2 is an exploded view of the same, Fig. 3 is a sectional view taken along the line of Fig. 1, and Fig. 4 shows a modified example of the same. 3, FIG. 5 is a cross-sectional view taken along the line -- in FIG. 2, and FIG. 6 is a diagram corresponding to FIG. 5 showing a modification of the same. 1... Skrill, 2... Main flight, 3... Sub-flight, 3A... Portion parallel to main flight, 3
B... Part parallel to the screw axis.
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、複数個設けられた主フライトと平行な部分
と、その隣接する終了点と開始点とが連結された
スクリユ軸に平行な部分とからなり、全体として
階段状に構成されるとともにこの副フライトの開
始点が主フライトと非接触でかつ終了点は主フラ
イトにほぼ直角に連結され、副フライトの高さは
前記主フライトより低く形成され、副フライトに
よつて分割されたスクリユ溝の流入側部分の溝深
さが、前記副フライトのスクリユ軸と平行する部
分でその高さと一致し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 前記副フライトと主フライトとの間〓の全幅
またはその一部の主フライトと平行する領域にお
いては、前記副フライトの開始点から終了点に至
るまで溝深さを一定としたことを特徴とする特許
請求の範囲第１項に記載のプラスチツク成形用ス
クリユ。 ３ 前記スクリユ軸に平行な部分に隣接する溝部
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項および第
２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。 ４ 前記スクリユ軸に平行な部分に隣接する溝部
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項および
第２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。 ５ 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４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 is connected to a plurality of main flights. It consists of a parallel part and a part parallel to the screw axis where the adjacent end point and start point are connected, and the overall structure is step-like, and the starting point of this sub-flight is not in contact with the main flight. And the end point is connected to the main flight at a substantially right angle, the height of the sub-flight is formed lower than the main flight, and the groove depth of the inflow side portion of the screw groove divided by the sub-flight is equal to that of the sub-flight. A screw for plastic molding, characterized in that a portion parallel to the axis of the screw matches the height of the screw. 2. In the entire width between the secondary flight and the main flight or a part thereof parallel to the main flight, the groove depth is constant from the start point to the end point of the secondary flight. A plastic molding screw according to claim 1. 3. The shape of the bottom surface of the groove adjacent to the portion parallel to the screw axis is a straight line that passes through one end of the top surface of the sub-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 any one of claims 1 and 2, characterized in that: 4. The shape of the bottom surface of the groove adjacent to the portion parallel to the screw axis 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 any one of claims 1 and 2, characterized in that: 5. The screw for plastic molding according to any one of claims 1 to 4, wherein the height of the sub-flight gradually increases toward the downstream side.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59264295A JPS61141513A (en) | 1984-12-14 | 1984-12-14 | Screw for molding plastic |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59264295A JPS61141513A (en) | 1984-12-14 | 1984-12-14 | Screw for molding plastic |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS61141513A JPS61141513A (en) | 1986-06-28 |
| JPH035285B2 true JPH035285B2 (en) | 1991-01-25 |
Family
ID=17401183
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59264295A Granted JPS61141513A (en) | 1984-12-14 | 1984-12-14 | Screw for molding plastic |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS61141513A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5035509A (en) * | 1990-08-13 | 1991-07-30 | Hpm Corporation | Multi-channel extrusion screw with a zig-zag undercut barrier |
| AT520198B1 (en) * | 2017-11-16 | 2019-02-15 | Univ Linz | plasticizing |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49130953A (en) * | 1973-04-07 | 1974-12-16 | ||
| 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 |
| JPS5919133A (en) * | 1982-07-22 | 1984-01-31 | Toshiba Mach Co Ltd | Screw for molding thermoplastic resin |
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 JP59264295A patent/JPS61141513A/en active Granted
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS49130953A (en) * | 1973-04-07 | 1974-12-16 | ||
| 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 |
| JPS5919133A (en) * | 1982-07-22 | 1984-01-31 | Toshiba Mach Co Ltd | Screw for molding thermoplastic resin |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS61141513A (en) | 1986-06-28 |
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