CN102259416A - Triple thread element and double-screw extruder using same - Google Patents
Triple thread element and double-screw extruder using same Download PDFInfo
- Publication number
- CN102259416A CN102259416A CN2011101445598A CN201110144559A CN102259416A CN 102259416 A CN102259416 A CN 102259416A CN 2011101445598 A CN2011101445598 A CN 2011101445598A CN 201110144559 A CN201110144559 A CN 201110144559A CN 102259416 A CN102259416 A CN 102259416A
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- CN
- China
- Prior art keywords
- thread element
- diameter
- machine barrel
- small
- double
- 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.)
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Classifications
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- 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
- B29C48/41—Intermeshing counter-rotating screws
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- 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
- B29B7/46—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft
- B29B7/48—Mixing; Kneading continuous, with mechanical mixing or kneading devices with movable mixing or kneading devices rotary with more than one shaft with intermeshing devices, e.g. screws
- B29B7/488—Parts, e.g. casings, sealings; Accessories, e.g. flow controlling or throttling devices
- B29B7/489—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
- B29C48/395—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
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Extrusion Moulding Of Plastics Or The Like (AREA)
- Processing And Handling Of Plastics And Other Materials For Molding In General (AREA)
Abstract
The invention discloses a triple thread element and a double-screw extruder using the same. The large-diameter and small-diameter center lines of the thread element are superposed but have eccentricity with a rotation center of the thread element; the eccentricity exists between the large-diameter and small-diameter center lines and the rotation center, so that only one screw edge always keeps a small gap with the inner wall of a machine barrel when the thread element rotates in the machine barrel, and the other two screw edges keep large gaps with the inner wall of the machine barrel; therefore, shearing action applied to materials is greatly reduced compared with that of the common triple thread element, the materials generate a little heat, and the triple thread element is particularly suitable for thermosensitive materials; in addition, the large diameter and the small diameter are not concentric with the rotation center, so the ratio of the large diameter to the small diameter of the thread element is low, and the filling degree of the materials is higher than that of the common triple thread element under the same process conditions; therefore, high yield can be achieved at a low speed, and energy consumption is reduced.
Description
Technical field
The present invention relates to a kind of screwing element, particularly a kind of three-start screw element that is used for double screw extruder.
Background technology
In double screw extruder, screwing element has conveying, shearing, effect such as mixing to material, can be divided into single head, double end and bull by its number.In identical helical pitch, the screw channel volume of one start screw element is bigger, but because its lug, nib number is few, so will be much smaller than double end and the bull concerning the shear action of material, melting effect to material is just very poor, uses also seldom in double screw extruder; Double end and multiple thread element are owing to the increase of its lug, nib number, and the screw channel volume reduces, and output can descend, but the shearing and the immixture of material strengthened, and use more extensive in double screw extruder.But in some special application scenarios, common double end and three s' function does not also reach the technological requirement of material production.As some heat sensitive materials, the melting effect that should guarantee obtains high yield again.
Summary of the invention
The objective of the invention is: for double screw extruder provide a kind of shear heating less, the eccentric three-start screw element of good, the less energy consumption of melting effect.
Technical scheme of the present invention is that a kind of three-start screw element is characterized in that: the big footpath of this screwing element and path central lines, but the center line of the two and its pivot (spline center just) have an eccentric throw.
Supplementary technology scheme of the present invention is as follows:
Preferably, described screwing element is that building block system is installed.
Preferably, described screwing element corresponding installation phase place on mandrel is unique.
The invention has the beneficial effects as follows: owing between big footpath, path center line and the pivot this eccentric throw has been arranged, make when screwing element rotates in machine barrel, all the time have only a spiral shell rib and machine tube inner wall to keep less clearance, two other spiral shell rib all keeps big gap with machine tube inner wall, will reduce much with respect to common three-start screw element with regard to the shear action that makes material be subjected to like this, the material heating is less, is specially adapted to some heat sensitive materials; In addition, because big footpath and path and pivot decentraction, so cause the OD/ID ratio of path (the big footpath with) of this screwing element lower, under the same process condition, the filling extent of material will be higher than common three-start screw element, so just can obtain high yield under low speed, it is few to enable depletion.
Description of drawings
The present invention will illustrate by example and with reference to the mode of accompanying drawing, wherein:
Fig. 1 is the end face model schematic diagram of embodiment of the invention screw element.
Fig. 2 is the envelope schematic diagram of middle screw element embodiment illustrated in fig. 1.
Fig. 3 is the phase place schematic diagram (reverse inside rotation) that middle screwing element embodiment illustrated in fig. 1 rotates a circle in machine barrel.
Fig. 4 is the eccentric three-start screw element schematic diagram in embodiment illustrated in fig. 1.
Fig. 5 is the common three-start screw element schematic diagram with Fig. 4 same specification.
The specific embodiment
Specific embodiments of the invention 1, a kind of double screw extruder, eccentric three-start screw element is installed on its inner screw rod, as depicted in figs. 1 and 2, eccentric three-start screw element 4 is installed in the cylindrical shell 7, the center 3 of its big footpath circle 6 and path circle 4 is concentric, between big footpath circle 6 and the path circle 4 transition arc 5 is arranged, the pivot of this screwing element, it also is the center 2 of spline, the spline of this screwing element 4 connects tooth center 1 and is used for the phase place of positioning threads element 4 on mandrel, and this spline connects tooth can guarantee that the installation phase place of screwing element can not make mistakes.Between center 3 and the pivot 2 eccentric throw is arranged.
The work of this routine screw element 4 is as shown in Figure 3:
A) be initial position, a) to i) be the phase place schematic diagram of 45 ° of the reverse inside every rotations of this screwing element.As can be seen from the figure, in a) figure, two screwing element phase differences are about 180 degree, and in the process of this screwing element rotation, each screwing element has only a spiral shell rib and machine tube inner wall to keep normal little gap all the time, and two other spiral shell rib is all big than normal clearance with the gap of machine barrel.The shear action that so just makes material be subjected in machine barrel is littler than common three-start screw element, shears heating and just lacks, and this is specially adapted to some heat sensitive materials.
Be illustrated in figure 4 as three of off-centre in the present embodiment; Figure 5 shows that common three
From Fig. 4 and Fig. 5 more as can be seen, the OD/ID that the off-centre of same specification is three ratio of path (the big footpath with) than common three little.Under the same process condition, eccentric three material filling extent will be higher than common three-start screw element, so just can obtain high yield under low speed, and it is few to enable depletion.
Disclosed all features in this specification, or the step in disclosed all methods or the process except mutually exclusive feature and/or step, all can make up by any way.
Disclosed arbitrary feature in this specification (comprising any accessory claim, summary and accompanying drawing) is unless special narration all can be replaced by other equivalences or the alternative features with similar purpose.That is, unless special narration, each feature is an example in a series of equivalences or the similar characteristics.
The present invention is not limited to the aforesaid specific embodiment.The present invention expands to any new feature or any new combination that discloses in this manual, and the arbitrary new method that discloses or step or any new combination of process.
Claims (5)
1. three-start screw element, it is characterized in that: the big footpath of this screwing element and path central lines, the center line of the two and its pivot have an eccentric throw.
2. three-start screw element according to claim 1 is characterized in that: described screwing element is that building block system is installed.
3. three-start screw element according to claim 1 and 2 is characterized in that: described screwing element corresponding installation phase place on mandrel is unique.
4. double screw extruder that uses the described three-start screw element of claim 1, comprise the three-start screw element that is installed in the machine barrel, it is characterized in that: the phase relation of described 2 screwing elements configuration is, in the process of 2 screwing element rotations, all the time have only a spiral shell rib and machine tube inner wall to keep normal little gap, the gap of two other spiral shell rib and machine barrel is greater than normal clearance.
5. double screw extruder according to claim 4 is characterized in that: two screw rod direction of rotation are opposite, phase difference 180 degree.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101445598A CN102259416A (en) | 2011-05-31 | 2011-05-31 | Triple thread element and double-screw extruder using same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011101445598A CN102259416A (en) | 2011-05-31 | 2011-05-31 | Triple thread element and double-screw extruder using same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102259416A true CN102259416A (en) | 2011-11-30 |
Family
ID=45006343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2011101445598A Pending CN102259416A (en) | 2011-05-31 | 2011-05-31 | Triple thread element and double-screw extruder using same |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102259416A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108582724A (en) * | 2018-06-11 | 2018-09-28 | 南京科森挤出装备有限公司 | A kind of one start screw set of balance end face |
| CN111941798A (en) * | 2020-06-08 | 2020-11-17 | 东南大学 | Double-screw extruder's combination of double-end-three-head kneading block |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4131371A (en) * | 1977-08-03 | 1978-12-26 | E. I. Du Pont De Nemours And Company | Co-rotating multiple screw processor |
| EP0002131A1 (en) * | 1977-11-19 | 1979-05-30 | Sekisui Kagaku Kogyo Kabushiki Kaisha | Improved self-cleaning type extruder |
| JPS60208209A (en) * | 1984-04-02 | 1985-10-19 | ヴエルナ− ウント プフライデラ− | Same-direction rotating type double screw kneader with kneading plate |
| JPS61242822A (en) * | 1985-04-22 | 1986-10-29 | Mitsubishi Heavy Ind Ltd | Two-axial extruding machine |
| CN2471522Y (en) * | 2001-03-01 | 2002-01-16 | 北京化工大学 | Three screw rod extruder for polymer |
| WO2002009919A2 (en) * | 2000-07-31 | 2002-02-07 | Babu Padmanabhan | Fractional and higher lobed co-rotating twin-screw elements |
| CN202123643U (en) * | 2011-05-31 | 2012-01-25 | 四川金鑫螺杆成套设备有限公司 | Triple screw element |
-
2011
- 2011-05-31 CN CN2011101445598A patent/CN102259416A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4131371A (en) * | 1977-08-03 | 1978-12-26 | E. I. Du Pont De Nemours And Company | Co-rotating multiple screw processor |
| EP0002131A1 (en) * | 1977-11-19 | 1979-05-30 | Sekisui Kagaku Kogyo Kabushiki Kaisha | Improved self-cleaning type extruder |
| JPS60208209A (en) * | 1984-04-02 | 1985-10-19 | ヴエルナ− ウント プフライデラ− | Same-direction rotating type double screw kneader with kneading plate |
| JPS61242822A (en) * | 1985-04-22 | 1986-10-29 | Mitsubishi Heavy Ind Ltd | Two-axial extruding machine |
| WO2002009919A2 (en) * | 2000-07-31 | 2002-02-07 | Babu Padmanabhan | Fractional and higher lobed co-rotating twin-screw elements |
| CN2471522Y (en) * | 2001-03-01 | 2002-01-16 | 北京化工大学 | Three screw rod extruder for polymer |
| CN202123643U (en) * | 2011-05-31 | 2012-01-25 | 四川金鑫螺杆成套设备有限公司 | Triple screw element |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108582724A (en) * | 2018-06-11 | 2018-09-28 | 南京科森挤出装备有限公司 | A kind of one start screw set of balance end face |
| CN111941798A (en) * | 2020-06-08 | 2020-11-17 | 东南大学 | Double-screw extruder's combination of double-end-three-head kneading block |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C53 | Correction of patent of invention or patent application | ||
| CB02 | Change of applicant information |
Address after: 611830 Dujiangyan Economic Development Zone, Sichuan, Chengdu Applicant after: Sichuan Sinoextruder Technology Co., Ltd. Address before: 610000 Dujiangyan Economic Development Zone, Chengdu, Sichuan, Sichuan Applicant before: Sichuan Jinxin Screw Complete Set Equipment Co., Ltd. |
|
| COR | Change of bibliographic data |
Free format text: CORRECT: APPLICANT; FROM: SICHUAN JINXIN SCREW COMPLETE SET EQUIPMENT CO., LTD. TO: SICHUAN ZHONGZHUANG TECHNOLOGY CO., LTD. |
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| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20111130 |
|
| RJ01 | Rejection of invention patent application after publication |