JPS6111180B2 - - Google Patents
Info
- Publication number
- JPS6111180B2 JPS6111180B2 JP54046353A JP4635379A JPS6111180B2 JP S6111180 B2 JPS6111180 B2 JP S6111180B2 JP 54046353 A JP54046353 A JP 54046353A JP 4635379 A JP4635379 A JP 4635379A JP S6111180 B2 JPS6111180 B2 JP S6111180B2
- Authority
- JP
- Japan
- Prior art keywords
- screw
- cylinder
- extrusion molding
- molding machine
- screw shaft
- 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
Links
- 238000001125 extrusion Methods 0.000 claims description 12
- 239000011295 pitch Substances 0.000 claims description 7
- 239000012778 molding material Substances 0.000 description 10
- 230000000694 effects Effects 0.000 description 7
- 238000004898 kneading Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 238000010008 shearing Methods 0.000 description 2
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000002844 melting Methods 0.000 description 1
- 230000008018 melting Effects 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000012768 molten material Substances 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
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
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
- B29C48/402—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders the screws having intermeshing parts
-
- 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
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
-
- 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
- B29C48/395—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders
- B29C48/40—Means for plasticising or homogenising the moulding material or forcing it through the nozzle or die using screws surrounded by a cooperating barrel, e.g. single screw extruders using two or more parallel screws or at least two parallel non-intermeshing screws, e.g. twin screw extruders
-
- 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)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Description
【発明の詳細な説明】
本発明は押出成形機のスクリユー構造に関する
もので、さらに詳述すれば押出成形機８のシリン
ダ７内に２本のスクリユー軸本体１，２を平行に
配設し、両スクリユー軸本体１，２の外周に隣接
せる外鍔のピツチが互いに相異する半円状の外鍔
３，４，５，６を螺旋状に突設して成ることを特
徴とする押出成形機のスクリユー構造に係るもの
である。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a screw structure of an extrusion molding machine, and more specifically, two screw shaft bodies 1 and 2 are disposed in parallel in a cylinder 7 of an extrusion molding machine 8, Extrusion molding characterized in that semicircular outer flanges 3, 4, 5, and 6 adjacent to the outer peripheries of both screw shaft bodies 1 and 2 and having different pitches protrude in a spiral shape. This relates to the screw structure of the machine.
従来より成形材料を充分に混合、混練し成形に
供する為に、多種に亘る押出成形機のスクリユー
構造が考案され、且つ実用されてきている。各ス
クリユー軸は、それぞれ特有の効果を有するが、
なおより大きな効果をあげる為に色々と工夫され
つつあるのが現状である。本発明も従来のものよ
りも更に混合、混練をより効率的に達成する為の
もので、本発明の目的とするところは、押出成形
機のシリンダ内に配設せるスクリユー軸本体の外
周に、隣接せる外鍔間のピツチが互いに相異する
半円状の外鍔を螺旋状に突設することにより、成
形材料の混合を促進する効果と成形材料の流れを
複雑化する効果を増長し、シリンダ内周面ならび
にスクリユー間での剪断力を更に増大せしめ得る
こと更には成形材料塊の位置交換を効率よく行な
うことを可能とし、混練効果を極めて増大せしめ
ることができる押出成形機のスクリユー構造を提
供するにある。 Conventionally, a wide variety of screw structures for extrusion molding machines have been devised and put into practical use in order to sufficiently mix and knead molding materials for molding. Each screw axis has its own unique effect, but
Currently, various efforts are being made to achieve even greater effects. The present invention is also intended to achieve mixing and kneading more efficiently than the conventional ones, and the purpose of the present invention is to attach the outer circumference of the screw shaft body disposed inside the cylinder of the extrusion molding machine to By spirally protruding semicircular outer flanges with different pitches between adjacent outer flanges, the effect of promoting the mixing of the molding material and the effect of complicating the flow of the molding material are enhanced. The screw structure of the extrusion molding machine is capable of further increasing the shearing force between the inner circumferential surface of the cylinder and the screw, and also enables efficient positional exchange of the molding material mass, thereby greatly increasing the kneading effect. It is on offer.
以下本発明を図示実施例に従つて詳述する。 The present invention will be described in detail below with reference to illustrated embodiments.
図は本発明に係わる押出成形機の２軸スクリユ
ーの１実施例を例示したものであるが勿論単軸ス
クリユーの場合でも適用できるものである。図に
おいて１，２はスクリユー軸本体、３，４および
５，６はそれぞれピツチを異にした半円状の外鍔
である。７はシリンダである。これら外鍔３，
４，５，６はスクリユー軸本体３，４の外周に螺
旋状に突設してスクリユーＳを形成してあり、こ
のスクリユーＳはシリンダ７内に２本平行に配設
してある。 The figure illustrates one embodiment of a twin-screw extrusion molding machine according to the present invention, but it can of course also be applied to a single-screw extrusion molding machine. In the figure, 1 and 2 are screw shaft bodies, and 3, 4 and 5, 6 are semicircular outer flanges with different pitches. 7 is a cylinder. These outer tsuba 3,
4, 5, and 6 are spirally protruded from the outer periphery of the screw shaft bodies 3 and 4 to form screws S, and two screws S are arranged in parallel within the cylinder 7.
なお、本実施例の場合外鍔３，４ならびに５，
６は共に２ピツチ目と３ピツチ目において一致す
るように設計したものであるが勿論この実施例に
限定されるものではない。次ぎに本発明の作用に
ついて説明する。スクリユーＳのフイード部にお
いては、成形材料は固体状で輸送されながら序々
に加熱され、圧縮部（即ちスクリユーＳの中央部
分）に入ると急激に加圧されると共にシリンダ７
からの伝熱とシリンダ７とスクリユーＳ間とので
の剪断摩擦を受け、温度上昇と共に次第に可塑化
される。 In addition, in the case of this embodiment, the outer tsuba 3, 4 and 5,
6 are designed to match at the 2nd pitch and the 3rd pitch, but of course this is not limited to this embodiment. Next, the operation of the present invention will be explained. In the feed section of the screw S, the molding material is gradually heated while being transported in a solid state, and when it enters the compression section (i.e., the center section of the screw S), it is rapidly pressurized and the cylinder 7
As the temperature increases, it gradually becomes plasticized due to heat transfer from the cylinder 7 and shear friction between the cylinder 7 and the screw S.
その際、本発明のスクリユーＳにあつては、成
形材料塊の分割と位置交換が盛んに行なわれるた
め、材料温度の均一化と可塑化の促進を効率的に
達成する効果を有する。更にメルテイング部即ち
スクリユーＳの成形材料押出側端部に至つた溶融
材料は、スクリユー回転に伴う層流混合を受け、
シリンダ７の内周面ならびにスクリユーＳ間にお
ける間隙で強い剪断力を受けて混練されるが、そ
の際ピツチの異なる外鍔３，４，５，６間におい
て成形材料の流れは分割され、流れ状態が複雑化
される。その為に乱流混合が付加されると共に材
料の混練も更に助長されるのである。更に特筆す
べき効果として外鍔３，４，５，６の切れ目にお
いて分割された成形材料塊は次の外鍔３，４，
５，６を通過したのちに再び併合され、次の外鍔
３，４，５，６の切れ目に至つた際には、前回分
割、併合が行なわれた位置と異なつた位置から再
分割される。 At this time, in the screw S of the present invention, the molding material lump is frequently divided and replaced, so that it has the effect of efficiently achieving uniformity of material temperature and promotion of plasticization. Furthermore, the molten material that has reached the melting part, that is, the molding material extrusion side end of the screw S, undergoes laminar flow mixing as the screw rotates.
The molding material is kneaded under strong shearing force in the gap between the inner circumferential surface of the cylinder 7 and the screws S. At this time, the flow of the molding material is divided between the outer flanges 3, 4, 5, and 6 with different pitches, and the flow state is becomes complicated. Therefore, turbulent mixing is added and the kneading of the materials is further promoted. Furthermore, a noteworthy effect is that the molding material mass divided at the cuts in the outer tsuba 3, 4, 5, and 6 is divided into the next outer tsuba 3, 4, and 6.
After passing through points 5 and 6, it is merged again, and when it reaches the next break in outer guard 3, 4, 5, and 6, it is re-divided from a different position from the previous division and merging. .
このような挙動が繰り返されることによつて材
料の位置交換混合が達成されるのである。 By repeating this behavior, positional exchange mixing of materials is achieved.
図は本発明のスクリユーの一部分の縦断面図で
ある。
１，２……スクリユー軸本体、３，４，５，６
……外鍔、７……シリンダ、８……押出成形機。
The figure is a longitudinal sectional view of a portion of the screw of the present invention. 1, 2...screw shaft body, 3, 4, 5, 6
... Outer tsuba, 7... Cylinder, 8... Extrusion molding machine.
Claims (1)
軸本体を平行に配設し、両スクリユー軸本体の外
周に隣接せる外鍔とピツチが互いに相異する半円
状の外鍔を螺旋状に突設して成ることを特徴とす
る押出成形機のスクリユー構造。1 Two screw shaft bodies are arranged in parallel in the cylinder of an extrusion molding machine, and a semicircular outer collar with different pitches adjacent to the outer periphery of both screw shaft bodies is protruded in a spiral shape. A screw structure of an extrusion molding machine characterized by:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4635379A JPS55137941A (en) | 1979-04-15 | 1979-04-15 | Screw structure for extrusion molding machine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4635379A JPS55137941A (en) | 1979-04-15 | 1979-04-15 | Screw structure for extrusion molding machine |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS55137941A JPS55137941A (en) | 1980-10-28 |
| JPS6111180B2 true JPS6111180B2 (en) | 1986-04-01 |
Family
ID=12744773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4635379A Granted JPS55137941A (en) | 1979-04-15 | 1979-04-15 | Screw structure for extrusion molding machine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS55137941A (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU715469B2 (en) * | 1996-09-24 | 2000-02-03 | Dow Chemical Company, The | Multiple-screw extruder |
| US6062719A (en) * | 1996-09-24 | 2000-05-16 | The Dow Chemical Company | High efficiency extruder |
| JP4149283B2 (en) * | 2003-02-07 | 2008-09-10 | 住友ゴム工業株式会社 | Twin-screw kneading extruder |
-
1979
- 1979-04-15 JP JP4635379A patent/JPS55137941A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS55137941A (en) | 1980-10-28 |
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