JPH04294119A - Cascade type extruder - Google Patents
Cascade type extruderInfo
- Publication number
- JPH04294119A JPH04294119A JP3333354A JP33335491A JPH04294119A JP H04294119 A JPH04294119 A JP H04294119A JP 3333354 A JP3333354 A JP 3333354A JP 33335491 A JP33335491 A JP 33335491A JP H04294119 A JPH04294119 A JP H04294119A
- Authority
- JP
- Japan
- Prior art keywords
- screw
- outer screw
- cascade
- extruder
- inner screw
- 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.)
- Pending
Links
- 238000005266 casting Methods 0.000 claims description 4
- 238000007789 sealing Methods 0.000 claims description 4
- 239000000155 melt Substances 0.000 abstract description 3
- 238000001816 cooling Methods 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000001125 extrusion Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000011800 void material 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
- B29C48/445—Coaxially arranged screws, i.e. one within the other
-
- 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)
- Extrusion Moulding Of Plastics Or The Like (AREA)
Abstract
Description
【０００１】0001
【産業上の利用分野】本発明は、互いに無関係に駆動さ
れる同軸的に支承される２つのスクリューを有しており
、一方のスクリューが他方のスクリュー内に突入してい
る形式のカスケード形押出し機に関する。FIELD OF INDUSTRIAL APPLICATION The invention relates to cascade extrusion of the type having two coaxially supported screws driven independently of each other, one screw projecting into the other. Regarding machines.
【０００２】0002
【従来の技術】前記形式のカスケード形押出し機はドイ
ツ連邦共和国特許第１２５１９４３号明細書により公知
である。外側スクリューの作業範囲と、それに続くスク
リューの作業範囲とは、軸方向で互いに前後に位置して
いる。このことによって、全体の作業長さが大きくなる
。BACKGROUND OF THE INVENTION A cascade extruder of the above type is known from German Patent No. 1,251,943. The working range of the outer screw and the working range of the following screw are located one behind the other in the axial direction. This increases the overall working length.
【０００３】0003
【発明が解決しようとする課題】本発明の課題は、カス
ケード形押出し機の作業長さひいては要求スペースを短
くすることである。SUMMARY OF THE INVENTION It is an object of the invention to shorten the working length and thus the space requirements of a cascade extruder.
【０００４】0004
【課題を解決するための手段】前述の課題を解決するた
めに講じた本発明の手段は、内側スクリューが、外側ス
クリューの内孔内に位置しており、かつ外側スクリュー
の作業長さの一部分又は全体にわたって延びており、さ
らに内側スクリューの搬送方向が外側スクリューの搬送
方向とは逆向きであることにある。[Means for Solving the Problems] The means of the present invention taken to solve the above-mentioned problems is such that the inner screw is located within the inner hole of the outer screw, and a portion of the working length of the outer screw is Alternatively, it extends over the entire length, and the conveying direction of the inner screw is opposite to the conveying direction of the outer screw.
【０００５】[0005]
【発明の効果】本発明によって得られる利点は、加熱出
力及び／又は冷却出力、並びにこのために設けられる装
置を節減することができることである。つまり、それぞ
れのスクリューを選択的に低断熱的にあるいは高断熱的
に構成することができるので、一方のスクリューから他
方のスクリューへの熱流を、一方のスクリューから他方
のスクリューへの熱流が融成物の必要な温度案内を可能
にする形式で行なわれるように規定されることができる
。The advantage obtained by the invention is that the heating and/or cooling power and the equipment provided for this can be saved. In other words, each screw can be configured to be selectively low or high adiabatic, so that the heat flow from one screw to the other screw is reduced by the heat flow from one screw to the other screw. It can be provided that this is done in a manner that allows the necessary temperature guidance of the object.
【０００６】本発明の別の構成では、カスケード形押出
し機の部材が種々の熱膨張を有しており、あるいは作業
範囲の全体の延びにすきま容積が生じることにより生じ
る欠点が排除される。充填範囲は、この充填範囲のため
に定置のケーシング範囲が設けられることによって簡単
に形成される。A further development of the invention eliminates the disadvantages caused by the components of the cascade extruder having different thermal expansions or by the creation of void volumes over the entire working range. The filling area is simply formed by providing a stationary housing area for this filling area.
【０００７】[0007]
【実施例】図示のカスケード形押出し機において、内側
スクリュー１は外側スクリュー３の内孔２内に同軸的に
位置している。内側スクリュー１は図に示すように外側
スクリュー３の作業範囲の一部分にわたって、あるいは
その全体にわたって延びている。内側スクリュー１の、
入口１４を有する引込み範囲が、別個の、定置のケーシ
ング４内に支承されている。外側スクリュー３は外側ケ
ーシング５内に支承されており、この外側ケーシングも
同様に定置であり、かつ内側スクリュー１の定置のケー
シング４の部分に当て付けられている。両スクリュー１
，３及び両ケーシング４，５の熱膨張を補償するために
、周方向で分配されたねじボルト１５によって互いに結
合されたケーシング４，５は、ローラ１６に支持されて
おり、かつ機械基礎に固定されたレール１７上に長手方
向で移動可能に支承されている。このような構成は、手
入れ及び掃除の目的で行われるスクリュー１，３の分解
を簡略化することにも役立つ。DESCRIPTION OF THE PREFERRED EMBODIMENTS In the illustrated cascade extruder, the inner screw 1 is located coaxially within the bore 2 of the outer screw 3. The inner screw 1 extends over a portion of the working range of the outer screw 3, as shown in the figure, or over its entirety. Inner screw 1,
A retraction area with an inlet 14 is mounted in a separate, stationary casing 4 . The outer screw 3 is mounted in an outer housing 5, which is also stationary and rests against a part of the stationary housing 4 of the inner screw 1. Both screws 1
, 3 and both casings 4, 5, which are connected to each other by circumferentially distributed threaded bolts 15, are supported on rollers 16 and fixed to the machine foundation. It is supported so as to be movable in the longitudinal direction on a rail 17 which is provided with a cylindrical structure. Such an arrangement also serves to simplify the disassembly of the screws 1, 3 for care and cleaning purposes.
【０００８】内側スクリューの駆動装置（図示せず）は
、外側スクリュー３とは反対の側に位置している。外側
スクリュー３の駆動装置（図示せず）は、内側スクリュ
ー１とは反対の側に位置している。両方の駆動装置の回
転数は、互いに無関係に制御可能である。外側スクリュ
ー３は、内側スクリュー１の定置のケーシング４と外側
スクリュー３の外側ケーシング５との間のギャップを橋
渡しするだけの長さである。外側スクリュー３は例えば
、半径方向ガイドを有するスラスト軸受６によって内側
スクリュー１の定置のケーシング４に支持される。さら
に、外側スクリュー３のシールのために、外側スクリュ
ーの外側ケーシング５の駆動側端部にシール部材７が、
かつ反対側端部にシール部材８が設けられている。The drive of the inner screw (not shown) is located on the opposite side from the outer screw 3. The drive of the outer screw 3 (not shown) is located on the opposite side from the inner screw 1. The rotational speeds of both drives can be controlled independently of each other. The outer screw 3 is long enough to bridge the gap between the stationary casing 4 of the inner screw 1 and the outer casing 5 of the outer screw 3. The outer screw 3 is, for example, supported on the stationary casing 4 of the inner screw 1 by a thrust bearing 6 with a radial guide. Furthermore, for sealing the outer screw 3, a sealing member 7 is provided at the drive side end of the outer casing 5 of the outer screw.
A sealing member 8 is provided at the opposite end.
【０００９】溶融すべき材料が、入口１４から内側スク
リュー１の定置のケーシング４内に充填されて、外側ス
クリュー３の駆動側まで、もしくは内孔２の駆動側端部
まで搬送される。内孔の駆動側端部では、図２に示すよ
うに、外側スクリュー３が、該外側スクリューの内孔２
と外套１０との間の少なくとも１つの半径方向の溢流通
路９を有している。この溢流通路９は、外側ケーシング
５に形成されたリング状の環状の溢流溝１１と連通する
。外側スクリュー３の作業範囲も、同様にこの溢流溝１
１と連通する。The material to be melted is filled into the stationary casing 4 of the inner screw 1 through the inlet 14 and is conveyed to the drive side of the outer screw 3 or to the drive end of the bore 2 . At the drive side end of the inner bore, the outer screw 3 is inserted into the inner bore 2 of the outer screw, as shown in FIG.
and at least one radial overflow channel 9 between the jacket 10 and the jacket 10. This overflow passage 9 communicates with a ring-shaped annular overflow groove 11 formed in the outer casing 5. The working range of the outer screw 3 is also within this overflow groove 1.
Connects with 1.
【００１０】さらに、外側スクリュー３は、溢流溝１１
の端縁と一緒に外側スクリュー３の外側ケーシング５内
に鋳造ギャップ１２を形成する***部を形成する。鋳造
ギャップ１２によって、外側スクリュー３の作業範囲（
ねじ溝）が充填される。次いで、外側スクリュー３は再
び、内側スクリュー１の搬送方向（矢印１８）とは反対
の方向で搬送される。外側ケーシング５からの出口１３
が、外側ケーシング５の、外側スクリュー３の駆動装置
とは反対の側に設けられている。Furthermore, the outer screw 3 has an overflow groove 11.
forms a ridge which together with the edge forms a casting gap 12 in the outer casing 5 of the outer screw 3. The casting gap 12 limits the working range of the outer screw 3 (
(thread groove) is filled. The outer screw 3 is then conveyed again in a direction opposite to the conveying direction of the inner screw 1 (arrow 18). Outlet 13 from outer casing 5
is provided on the side of the outer casing 5 opposite to the drive device of the outer screw 3.
【００１１】図示の実施例では、内側スクリュー１が、
反対向きの回転方向１９で、ケーシング４の入口１４か
らスクリュー先端２１まで、もしくは溢流溝１１及び鋳
造ギャップ１２まで融成物を搬送し、これに対して外側
スクリュー３は、同様に反対向きの回転方向２０で、搬
送作用のあるウエブ状ねじ山３．１によって掴んで、左
側へ出口１３まで搬送する。In the illustrated embodiment, the inner screw 1 is
In the opposite direction of rotation 19, the melt is conveyed from the inlet 14 of the casing 4 to the screw tip 21 or to the overflow groove 11 and the casting gap 12, whereas the outer screw 3 likewise conveys the melt in the opposite direction. In the direction of rotation 20, it is gripped by the conveying web-like thread 3.1 and conveyed to the left as far as the outlet 13.
【図１】本発明のカスケード形押出し機の縦断面図であ
る。FIG. 1 is a longitudinal cross-sectional view of a cascade extruder of the present invention.
【図２】溢流通路を示す図１の拡大図である。FIG. 2 is an enlarged view of FIG. 1 showing an overflow passage.
Claims (7)
承される２つのスクリューを有しており、一方のスクリ
ューが他方のスクリュー内に突入している形式のカスケ
ード形押出し機において、前記内側スクリュー（１）が
、外側スクリュー（３）の内孔（２）内に位置しており
、かつ外側スクリューの作業長さの一部分又は全体にわ
たって延びており、さらに内側スクリュー（１）の搬送
方向が外側スクリュー（３）の搬送方向とは逆向きであ
ることを特徴とするカスケード形押出し機。1. A cascade extruder of the type having two coaxially supported screws driven independently of each other, one screw protruding into the other, wherein the inner screw (1) is located in the inner bore (2) of the outer screw (3) and extends over part or the entire working length of the outer screw, and furthermore the conveying direction of the inner screw (1) is directed outward. A cascade type extruder characterized in that the direction of conveyance of the screw (3) is opposite to that of the extruder.
が、別個の定置のケーシング（４）内に位置している請
求項１記載のカスケード形押出し機。[Claim 2] Inlet (14) of inner screw (1)
2. Cascade extruder according to claim 1, wherein the extruder is located in a separate stationary casing (4).
に役立つ、外側スクリュー（３）の内孔（２）が、半径
方向の溢流通路（９）を介して、外側スクリュー（３）
の外側ケーシング（５）内の環状の溢流溝（１１）内に
開口しており、さらに外側スクリュー（３）の作業範囲
が、鋳造ギャップ（１２）を形成して溢流溝（１１）と
連通している請求項１又は２記載のカスケード形押出し
機。3. The inner bore (2) of the outer screw (3), which serves to receive the inner screw (1), is connected to the outer screw (3) via a radial overflow channel (9).
It opens into an annular overflow groove (11) in the outer casing (5) of the outer casing (5), and further the working area of the outer screw (3) forms a casting gap (12) between the overflow groove (11) and the overflow groove (11). The cascade extruder according to claim 1 or 2, wherein the extruders are in communication.
外側スクリューとは反対側の端部に、外側スクリュー（
３）の駆動装置が、内側スクリュー（３）とは反対側の
端部に、それぞれ配置されている請求項１から３までの
いずれか１記載のカスケード形押出し機。4. The drive device for the inner screw (1) comprises:
At the end opposite the outer screw, attach the outer screw (
4. Cascade extruder according to claim 1, wherein the drives of 3) are each arranged at the end opposite the inner screw (3).
ュー（３）のウエブ状ねじ山のらせんの向きが同じであ
る場合に両スクリュー（１，３）の回転方向が同じであ
り、かつウエブ状ねじ山のらせんの向きが同じでない場
合に回転方向が逆であるという条件で、内側スクリュー
（１）及び外側スクリュー（３）が、同方向又は反対方
向に駆動可能である請求項１から４までのいずれか１記
載のカスケード形押出し機。5. When the spiral directions of the web-like threads of the inner screw (1) and the outer screw (3) are the same, the rotation directions of both screws (1, 3) are the same, and the web-like thread Claims 1 to 4, characterized in that the inner screw (1) and the outer screw (3) can be driven in the same direction or in opposite directions, provided that the direction of rotation is opposite if the helical orientation of the crests is not the same. The cascade extruder according to any one of the above.
グ（５）と、内側スクリュー（１）の入口（１４）の定
置のケーシング（４）との間に、外側スクリュー（３）
によって橋渡しされる軸方向のギャップが存在しており
、さらに外側スクリュー（３）が、内側スクリュー（１
）の入口の定置のケーシング（４）に支持されており、
及び／又は、外側スクリュー（３）が外側ケーシング（
５）に対してシール部材（７，８）を備えている請求項
４又は５記載のカスケード形押出し機。6. Between the outer casing (5) of the outer screw (3) and the stationary casing (4) of the inlet (14) of the inner screw (1), the outer screw (3)
There is an axial gap bridged by the outer screw (3) and the inner screw (1
) is supported on a stationary casing (4) at the inlet of the
and/or the outer screw (3) is connected to the outer casing (
6. A cascade extruder according to claim 4, further comprising sealing elements (7, 8).
が内側スクリュー（１）の駆動側に、かつ出口（１３）
が外側スクリュー（３）の、該外側スクリュー（３）の
駆動側とは反対の側に位置している請求項１から６まで
のいずれか１記載のカスケード形押出し機。[Claim 7] Inlet (14) of cascade extruder
on the drive side of the inner screw (1) and on the outlet (13)
7. Cascade extruder according to claim 1, characterized in that the extruder is located on the side of the outer screw (3) opposite the drive side of the outer screw (3).
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE4040418.8 | 1990-12-18 | ||
| DE4040418 | 1990-12-18 | ||
| DE4105071.1 | 1991-02-19 | ||
| DE4105071 | 1991-02-19 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04294119A true JPH04294119A (en) | 1992-10-19 |
Family
ID=25899444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3333354A Pending JPH04294119A (en) | 1990-12-18 | 1991-12-17 | Cascade type extruder |
Country Status (3)
| Country | Link |
|---|---|
| JP (1) | JPH04294119A (en) |
| DE (1) | DE4139794A1 (en) |
| IT (1) | IT1252247B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE4406372C1 (en) * | 1994-02-26 | 1995-02-23 | Krauss Maffei Ag | Extruder |
-
1991
- 1991-12-03 DE DE4139794A patent/DE4139794A1/en not_active Withdrawn
- 1991-12-10 IT ITMI913314A patent/IT1252247B/en active IP Right Grant
- 1991-12-17 JP JP3333354A patent/JPH04294119A/en active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| DE4139794A1 (en) | 1992-06-25 |
| ITMI913314A0 (en) | 1991-12-10 |
| IT1252247B (en) | 1995-06-05 |
| ITMI913314A1 (en) | 1993-06-10 |
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