JPS6116812A - Screw for highly kneading thermoplastic resin - Google Patents
Screw for highly kneading thermoplastic resinInfo
- Publication number
- JPS6116812A JPS6116812A JP59137488A JP13748884A JPS6116812A JP S6116812 A JPS6116812 A JP S6116812A JP 59137488 A JP59137488 A JP 59137488A JP 13748884 A JP13748884 A JP 13748884A JP S6116812 A JPS6116812 A JP S6116812A
- Authority
- JP
- Japan
- Prior art keywords
- flight
- troughs
- trough
- valley
- sectional area
- 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
- 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
- B29C48/62—Screws characterised by the shape of the thread channel, e.g. U-shaped
-
- 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)
- 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)
Abstract
Description
【発明の詳細な説明】
〔発明の属する技術分野〕
本発明は熱可塑性樹脂を成形する押出機や射出成形機或
いは吹込成形機等（以下これらを成形機という）のスク
リュに関する。DETAILED DESCRIPTION OF THE INVENTION [Technical field to which the invention pertains] The present invention relates to a screw for an extruder, injection molding machine, blow molding machine, or the like (hereinafter referred to as a molding machine) for molding a thermoplastic resin.
成形機においてスクリーによる樹脂の混線および混合は
極めて重要であり、これが不充分であると成形品は不均
質になって特性が劣り不良品になる。なお混線とは樹脂
材料であるペレットに圧縮力が作用して剪断力により溶
融化することをいい、混合とは溶融したものと未溶融の
ものをまぜあわせることを指すものとする。Cross-crossing and mixing of the resin by the scree in a molding machine is extremely important, and if this is insufficient, the molded product will be non-uniform and have poor characteristics, resulting in a defective product. Note that "mixing" refers to the compression force acting on pellets, which are resin materials, causing them to melt due to shearing force, and "mixing" refers to mixing molten and unmelted materials.
混線および混合を良くするため従来から第１図お工び第
２図に示すように、スクリュ１１の１ピッチ間に互に逆
位相に配置した２個の偏心リングである谷部１２お工び
１３を設ける方式が提案されている。この方式において
谷部１２のシリンダ１４に対する深い側の隙間１５から
浅い側の隙間１６にペレットが移動するとき、圧縮力は
作用するが２つの谷部１２と１３との間に山部がないの
で、−側の谷１２が浅くなりシリンダ１４と谷部１２と
のクサビ効果により混練しようとしても、隙間が深くて
抵抗の少い他側の谷部１３ヘペレツトは流れてほとんど
混練されなかった。In order to improve crosstalk and mixing, as shown in Fig. 1 and Fig. 2, two eccentric rings arranged in opposite phases between each pitch of the screw 11, trough 12, have conventionally been used. A method of providing 13 has been proposed. In this method, when the pellet moves from the gap 15 on the deep side to the gap 16 on the shallow side of the cylinder 14 in the trough 12, compressive force acts, but there is no peak between the two troughs 12 and 13. , the valleys 12 on the minus side became shallower and when kneading was attempted due to the wedge effect between the cylinder 14 and the valleys 12, the valleys 13 on the other side, which had deeper gaps and less resistance, flowed and were hardly kneaded.
本発明はこのような欠点を除去したものでその目的は、
第１フライトとこのフライトの間にその外径より小さい
第２および第３フライトを配置し、これらのフライトに
より形成された谷部において中央の谷と左右の谷を逆位
相の偏心円にすることにエリ、各科において深い谷から
浅い谷へペレットが移動するときクサビ効果の強い圧縮
力により確実な混線を行うようにすると共に、混練され
て溶融した樹脂は浅い谷から他側の深い谷に第２および
第３フライトを超えて強制的に移動させることにより混
合させ、もっと混線と混合を効率よく行うようにした熱
可塑性樹脂高混練スクリュを提供することにある。The present invention eliminates these drawbacks, and its purpose is to:
Arranging second and third flights smaller than the outer diameter of the first flight and this flight, and forming an eccentric circle in which the center valley and the left and right valleys are in opposite phases in the valley portion formed by these flights. In each category, when the pellets move from a deep valley to a shallow valley, the strong compressive force of the wedge effect ensures reliable intermixing, and the kneaded and molten resin moves from the shallow valley to the deep valley on the other side. It is an object of the present invention to provide a high-kneading screw for thermoplastic resin, which performs mixing by forcibly moving beyond the second and third flights, thereby achieving more efficient cross-mixing and mixing.
不発明の熱可塑性樹脂高混練スクリーは第１フライトと
、第１フライトの１ピツ千間に形成されかつ第１フライ
トの外径より小さい外形にした第２フライトおよび第３
フライトと、３箇のフライトにより形成されその中央の
谷部および左右の谷部はそれぞれスフｌ）二軸心に対し
逆位相の偏心円でありかつ左右谷部の流路断面積の和は
中央谷部の流路断面積にほぼ等しくした３箇の谷部とか
らなることを特徴にしている。The uninvented thermoplastic resin highly kneaded scree has a first flight, and a second flight and a third flight each having an outer diameter smaller than the outer diameter of the first flight.
The center trough and the left and right troughs are formed by a flight and three flights, and the central trough and left and right troughs are eccentric circles with opposite phases to the two axes, and the sum of the cross-sectional areas of the left and right troughs is the center. It is characterized by consisting of three troughs whose cross-sectional area is approximately equal to the cross-sectional area of the trough.
以下本発明について一実施例を示した第３図ないし第８
図につ層て説明する。スクリュ３１はその第１フライト
３２の１ピツ千間に第１フライトの外径より小さい外径
の第２フライト３３および第３フライト３４を有する３
条スクリュであって、これら３箇のフライト３２ないし
３４により中央の谷３５ならびに左右の谷３６および３
７が形成されている。なお第１フライト３２の外径はシ
リンダ１４の内径より僅かに小さい。谷３５ないし３７
は第４図および第５図に示すようにその断面は円形をな
しスクリュ３１の軸心に対し偏心しており、かつ谷３５
に対し谷３６および３７は逆位相に配置されている。ま
た各科３５ないし３７の円形は同一直径であり、シ１１
ンダ１４の内面から谷底までの距離のうち最も浅い寸法
をαとし最も深い寸法をβと１２、シリンダ１４の内面
から第２フライト３３および第３フライト３４の頂部間
距離をγとする。αとγの関係はγ≧αであるが、図で
はγ〉αの場合を示しである。The following Figures 3 to 8 show one embodiment of the present invention.
The diagram will be explained in detail. The screw 31 has a second flight 33 and a third flight 34 each having an outer diameter smaller than the outer diameter of the first flight 32 between each of its first flights 32.
These three flights 32 to 34 form a central valley 35 and left and right valleys 36 and 3.
7 is formed. Note that the outer diameter of the first flight 32 is slightly smaller than the inner diameter of the cylinder 14. Valley 35 to 37
As shown in FIGS. 4 and 5, its cross section is circular, eccentric to the axis of the screw 31, and the valley 35
On the other hand, valleys 36 and 37 are arranged in opposite phases. Also, the circles in each category 35 to 37 have the same diameter, and the circles in each category 11
The shallowest dimension of the distance from the inner surface of the cylinder 14 to the bottom of the valley is α, the deepest dimension is β and 12, and the distance between the tops of the second flight 33 and the third flight 34 from the inner surface of the cylinder 14 is γ. Although the relationship between α and γ is γ≧α, the figure shows the case where γ>α.
次に前述した実施例の動作を説明する。第１フライト３
２の１ピツ千間内のペレットに谷３６および３７の谷深
さがβからαに変るとき、同様に谷３５の谷深さがβか
らαに変るとき谷底とシ１１ンｉ°１４とのクサビ効果
にエリ強い圧縮力を受けて確実な混線を受ける。混練さ
れて溶融した樹脂は第２フライト３３お工び第３フライ
ト３４の頂部隙間γを強制的に超えされて、浅いα部か
ら深いβ部へ流れ各３５と谷３６お工び３７の樹脂は混
合される。Next, the operation of the embodiment described above will be explained. 1st flight 3
When the valley depths of valleys 36 and 37 change from β to α in the pellet within 1-pits 2 of 2, and similarly when the valley depth of valley 35 changes from β to α, the valley bottom and the line 11 i°14. Due to the wedge effect, the wires are subject to strong compressive force and are subject to reliable crosstalk. The kneaded and molten resin is forcibly passed through the top gap γ of the second flight 33 and the third flight 34, and flows from the shallow α part to the deep β part, forming resin in each part 35, valley 36, and part 37. are mixed.
〔発明の効果］
不発明の熱可塑性樹脂高混練スクリュは以上説明したよ
うに、第１フライトの１ピツ千間に第１フライトより外
径の小さい第２フライトおよび第３フライトを有する３
条スク１１ユであって、この３箇のフライトにより中央
の谷と左右の谷とを形成し、これらの谷は断面が円形で
スフ１１ユ軸心に ゛偏心すると共に中央の谷と左
右の谷の偏心は逆位相に配置した。またシ１１ンダの内
面から谷底までの距離のうち最も浅い寸法をαとし最も
深い寸法をβとし、シリンダ１４の内面から第２フライ
トお工び第３フライトの頂部間距離をγと１−た。[Effects of the Invention] As explained above, the uninvented thermoplastic resin high kneading screw has three flights each having a second flight and a third flight each having a smaller outer diameter than the first flight.
These three flights form a central valley and left and right valleys. The eccentricities of the valleys were arranged in opposite phases. Also, the shallowest dimension of the distance from the inner surface of the cylinder 11 to the bottom of the valley is α, the deepest dimension is β, and the distance between the tops of the second flight and the third flight from the inner surface of the cylinder 14 is γ and 1−. .
この構成に工り第１フライト１ピツ千間のペレットは谷
底からシ１１ンダ内面までの谷深さがβからαに変ると
き、クサビ効果の強い圧縮力により確実な混線を受ける
と共に、混練されて溶融した樹脂は第２フライトおよび
第３フライトの頂部を強制的に超えさせられて隙間の浅
い万から深い方へと隣の谷に移動１７て混合される。こ
のとき−側の谷深さが浅くなって流路断面積が減少して
圧力Ｐ１は高く、他側の谷深さが深くなって流路断面積
が増加して圧力Ｐ２は低いこと、ならびに両側断面積の
和は常にほぼ同じであるから混練されて溶融した樹脂は
円滑１／ｒ７２フライトおよび第３フライトを超えて混
合式れる。With this structure, when the depth of the valley from the valley bottom to the inner surface of cylinder 11 changes from β to α, the pellets of 1 1,000 pieces in the first flight undergo reliable crosstalk due to the strong compressive force of the wedge effect, and are kneaded. The molten resin is forced to pass over the tops of the second and third flights and moves from the shallow gap to the deep one into the adjacent valley 17 where it is mixed. At this time, the valley depth on the − side becomes shallower, the flow passage cross-sectional area decreases, and the pressure P1 is high, and the valley depth on the other side becomes deeper, the flow passage cross-sectional area increases, and the pressure P2 becomes lower. Since the sum of the cross-sectional areas on both sides is always approximately the same, the kneaded and melted resin is smoothly mixed over the 1/r72 flight and the third flight.
また３条スク１１ユｒより流路内樹脂は１回の圧縮で３
分割されて効果的り混練を受ける。さらに２条スクリー
では谷深さが浅くｋったとき溶融樹脂は第２フライトの
頂部を超え深い谷側に導かれるが、フライトによるせき
が一万のみのためせきと反対側の溶融樹脂は深い側に導
かれず取り残されて効率が落ちていた。本発明ではオフ
図に示すように谷深さが浅くなると溶融樹脂は両側の深
い側に導かれるため効率は倍加する。さらに第８図に示
すように左右の谷内の溶融樹脂は中央の谷へ両側から流
れるため樹脂の混合がエリ高められる等多ぐの利点を有
する。この結果成形品の物性は良（樹脂温も均一になっ
て均質な成形品が得られた。In addition, the resin in the flow path can be compressed 3 times with 3 strips of 11 urr.
It is divided and subjected to effective kneading. Furthermore, in the case of a two-line scree, when the valley depth is shallow and the molten resin exceeds the top of the second flight and is guided to the deeper valley side, the molten resin on the side opposite to the weir is deeper because the flight creates only 10,000 weirs. They were left behind without being guided by others, and their efficiency was declining. In the present invention, as shown in the off-graph, when the valley depth becomes shallow, the molten resin is guided to the deeper sides on both sides, thereby doubling the efficiency. Furthermore, as shown in FIG. 8, since the molten resin in the left and right valleys flows from both sides to the central valley, there are many advantages such as improved mixing of the resins. As a result, the physical properties of the molded product were good (the resin temperature was also uniform, and a homogeneous molded product was obtained).
なお３条スクリュより多条にしたときは樹脂の分割は多
くなるものの第１フライト１ピツ千間の流路断面積が減
少して好捷しくなく、また流路断面積を増加するため第
１フライト１ピツ千間の距離を大きくすると送り効率が
減少して全体の効率は低下することになる。Note that when using a multi-thread screw instead of a three-thread screw, the resin will be split more, but the cross-sectional area of the first flight will decrease, making it less convenient. If the distance of the flight is increased, the feeding efficiency will decrease and the overall efficiency will decrease.
第１図は従来例の縦断面図、第２図は第１図の２−２線
断面図、第３図ないし第８図は本発明の一実施例を示し
、第３図は縦断面図、第４図は第３図の４−４線断面図
、第５図は第３図の５−５線断面図、１６図は５−５線
断面を展開した図、オフ図は１６図の７−７線断面図、
第８図は１６図の８−８線断面図を示す。
３］・・・スクリュ、３２・・・第１フライト、３３・
・・第２フライト、３４・・・第３フライト、３５・・
・中央の谷、３６・・・左側の谷、３７・・・右側の谷
。FIG. 1 is a longitudinal sectional view of a conventional example, FIG. 2 is a sectional view taken along line 2-2 in FIG. 1, and FIGS. 3 to 8 show an embodiment of the present invention. , Fig. 4 is a sectional view taken along the line 4-4 in Fig. 3, Fig. 5 is a sectional view taken along the line 5-5 in Fig. 3, Fig. 16 is an expanded view of the sectional view taken along the line 5-5, and the off view is the sectional view taken along the line 5-5 in Fig. 16. 7-7 line sectional view,
FIG. 8 shows a sectional view taken along the line 8--8 in FIG. 16. 3]...screw, 32...first flight, 33.
...2nd flight, 34...3rd flight, 35...
・Central valley, 36... Valley on the left, 37... Valley on the right.
Claims (1)
れかつ同第１フライトの外径より小さい外形にした第２
フライトおよび第３フライトと、前記３箇のフライトに
より形成されその中央の谷部および左右の谷部はそれぞ
れスクリュ軸心に対し逆位相の偏心円でありかつ前記左
右谷部の流路断面積の和は前記中央谷部の流路断面積に
ほぼ等しくした３箇の谷部とからなり、それぞれの前記
谷部のシリンダ内面からの谷深さが最も浅い寸法をαと
し最も深い寸法をβとしたとき、前記谷深さがαからβ
に変化する際前記左右の谷は同一位相そして前記中央の
谷はこれと逆位相で変化することを特徴とする熱可塑性
樹脂高混練スクリュ。A first flight and a second flight formed between one pitch of the first flight and having an outer diameter smaller than the outer diameter of the first flight.
The flight, the third flight, and the central trough formed by the three flights and the left and right troughs are eccentric circles with opposite phases to the screw axis, and the cross-sectional area of the flow path of the left and right troughs is The sum consists of three valleys that are approximately equal to the flow passage cross-sectional area of the central valley, and the shallowest dimension of each valley from the inner surface of the cylinder is α, and the deepest dimension is β. When the valley depth is from α to β
2. A thermoplastic resin high kneading screw characterized in that, when changing to , the left and right valleys change in the same phase, and the center valley changes in an opposite phase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59137488A JPS6116812A (en) | 1984-07-03 | 1984-07-03 | Screw for highly kneading thermoplastic resin |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59137488A JPS6116812A (en) | 1984-07-03 | 1984-07-03 | Screw for highly kneading thermoplastic resin |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6116812A true JPS6116812A (en) | 1986-01-24 |
| JPS6335403B2 JPS6335403B2 (en) | 1988-07-14 |
Family
ID=15199812
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59137488A Granted JPS6116812A (en) | 1984-07-03 | 1984-07-03 | Screw for highly kneading thermoplastic resin |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6116812A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5342125A (en) * | 1992-05-14 | 1994-08-30 | Great Lakes Feedscrews, Inc. | Feedscrew for injection molding and extrusion |
| CN104002447A (en) * | 2014-05-15 | 2014-08-27 | 华南理工大学 | Eccentric rotor volume pulsation deformation plasticizing transport method and device |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS513186A (en) * | 1974-06-24 | 1976-01-12 | Matsushita Electric Ind Co Ltd |
-
1984
- 1984-07-03 JP JP59137488A patent/JPS6116812A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS513186A (en) * | 1974-06-24 | 1976-01-12 | Matsushita Electric Ind Co Ltd |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5342125A (en) * | 1992-05-14 | 1994-08-30 | Great Lakes Feedscrews, Inc. | Feedscrew for injection molding and extrusion |
| CN104002447A (en) * | 2014-05-15 | 2014-08-27 | 华南理工大学 | Eccentric rotor volume pulsation deformation plasticizing transport method and device |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6335403B2 (en) | 1988-07-14 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |