• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    In an apparatus for feeding granules and filler material to an extruder screw (11) of an extruder, there is a cyclone (12) having a feed opening for introducing a flow of pneumatically conveyed fill material and a discharge opening (16) for discharging the fill material deposited from the feed stream, a hopper (1) for the fresh granules and a mixing section (9) are provided, which are supplied to the deposited filler and the fresh granules from the hopper (1). The cyclone (12) is arranged at least partially in the feed hopper (1) and coaxially with it, so that the discharge opening (16) of the cyclone (12) is immersed in a discharge area (6) of the hopper (1) surrounding the discharge opening (16) wherein a plug screw (19) axially passes through the discharge opening (16) of the cyclone (12) and projects at least partially into the mixing section (9) axially adjoining the discharge opening (16).
    公开号:AT512170A4
    申请号:T254/2012
    申请日:2012-02-28
    公开日:2013-06-15
    发明作者:
    申请人:Bsw Machinery Handels Gmbh；
    IPC主号:
    专利说明:

    The invention relates to a device for feeding granules and filler material to an extruder screw of an extruder, comprising a cyclone with an entry opening for introducing a flow of pneumatically conveyed filling material and a discharge opening for discharging the precipitated from the flow of filling material, a hopper for the fresh granules and a mixing section, to which the filling material and the fresh granules are fed from the feeding hopper.
    In the coating of fabric webs, for example webs of monoaxially stretched polymer, in particular polyolefin, preferably polypropylene tapes, falls when starting the aggregates and then when trimming the coating a significant amount of waste. In order to enable the use of this waste and to increase the economic efficiency, the most diverse proposals have already been made. For example, it is known to process these wastes to regenerate and to return them to the extruder. In particular, it has already been proposed to recirculate the edge trim in strip form directly into the hopper of the extruder. In this case, however, considerable difficulties, in particular because it is necessary that the cut edge strips must be removed at the same speed with which they arise and at this speed must be drawn into the hopper of the extruder.
    Another proposal is therefore to cut the cut edge strips and the shredded edge strips mixed with fresh granules to feed the extruder screw. It is for example in
    DE 2308698 A described that the shredded in the shredder edge strips are pneumatically discharged and the flow is fed to a centrifugal separator, in particular cyclone, in which the shredded edge strips are separated from the flow and fall into the conveying path of a vertical auger. The auger transports the shredded edge strips to a mixing section where they are mixed with fresh granules. The mixture is fed in the wake of the extruder screw, in which the mixture is homogenized and melted.
    A disadvantage of the described method is that the shredded waste at the discharge opening of the cyclone tend to bridge, so that there is a risk of clogging of the discharge. The bridging causes the degree of filling of the screw conveyor is varied or reduced. There are a number of reasons for bridging, such as the static charge of the chips, the tendency of the chips to agglomerate and the low weight of the chips. The smaller the size of the individual chips, the greater the risk of bridging. The tendency to bridge formation is further dependent on a number of environmental conditions, such as the ambient heat and humidity, so that overall an uncontrollable and therefore unsatisfactory situation exists. The varying or reduced degree of filling of the screw conveyor on the one hand leads to an unreliable and error-prone operation of the screw conveyor, so that frequent service interruptions are required to remedy any faults. On the other hand, this reduces the proportion of chips in the extruder screw, so that a relatively larger amount of fresh granules is needed, which increases the cost.
    The invention therefore aims to make the return of the shredded waste into the extruder more reliable, in particular avoiding bridge formation of the chips and the mass flow rate during removal of the chips from the cyclone should be improved and made uniform. Furthermore, the return or supply of any other filling materials should be accomplished as the aforementioned Schnitzel. Finally, the design should be as space-saving as possible, so that the delivery routes can be shortened.
    To solve this problem, the invention provides in a device of the type mentioned above, that the cyclone is at least partially disposed in the hopper and coaxial therewith, so that the discharge of the cyclone dips into a discharge opening surrounding the annular discharge region of the hopper, and that a plug screw axially passes through the discharge opening of the cyclone and protrudes into the mixing section axially adjoining the discharge opening. The fact that the filling material, in particular the chips is not transported away by means of a screw running vertically and below the discharge opening, but by means of a filling screw axially passing through the filling screw, it is possible to substantially increase the degree of filling of the screw. Clogging of the discharge opening by agglomerated filling material is prevented in that the filling material is no longer discharged from the cyclone solely on the basis of gravity, but is forcibly conveyed through the discharge opening with the aid of the stuffing screw. in the
    Inlet area of the plug screw blockage is prevented by the fact that the air circulation inside the cyclone keeps the filling material loose.
    The coaxial arrangement of the cyclone and the hopper for the fresh granules leads to a very compact design, which does not require long transport routes. This increases reliability and minimizes operating costs. In this case, the discharge opening of the cyclone dips into a discharge area of the hopper which surrounds the discharge opening in a ring shape, so that the filling material is mixed with the fresh granulate immediately after it has left the cyclone. There is thus no vertical transport to a separate mixing device is required, but the mixing takes place in an axially adjacent to the discharge mixing section, the mixing or onward transport through this mixing section is facilitated by the StopfSchnecke protrudes into the mixing section. The stuffing screw preferably extends through the entire mixing section and ends immediately above the extruder screw running transversely to the stuffing screw. This leads to an increase in the degree of filling of the extruder screw.
    A preferred embodiment provides that the shaft of the screw plug passes through the cyclone axially and is led out of the cyclone via a dip tube. In the lead-out section, a suitable drive engages the shaft in order to set the shaft in rotation.
    A particularly efficient discharge of the filling material from the cyclone preferably succeeds in that the cyclone has a conically tapered separating section and a thereto
    has subsequent cylindrical conveying region through which the plug screw extends and whose inner diameter substantially corresponds to the outer diameter of the stuffing screw.
    The degree of filling of the plug screw is advantageously increased even further by the plug screw having a conical envelope surface converging in the transport direction in the lowermost section of the separating section. This ensures that the filling material accumulating at the lower end of the separating section of the cyclone is forced into the inlet region of the cylindrical conveying region. The conical initial section of the stuffing screw further causes the plug screw in case of a possible breakage of its shaft does not fall out of the cyclone through the discharge and can collide with the extruder screw, which would lead to significant damage to the equipment parts.
    A further preferred embodiment provides that the mixing section is funnel-shaped with a cross-section that tapers in the direction of transport. This leads to a compression of the mixture of fresh granules and filling material and in a further consequence to a better homogenization of the mixture in the extruder screw,
    A further reduction of the transport paths is preferably achieved in that the mixing section has an outlet opening that can be connected to the extruder screw and that the stuffing screw extends up to the outlet opening.
    In order to co-rotate the ττ =. * · · * Ϊ'ω · ΛΓ-ν ^ * · ί »ϋ promoted with the stuffing screw
    To avoid filling material, provides a preferred development, that the cylindrical conveyor region has at its cooperating with the stuffing screw inner circumference in the longitudinal direction extending grooves. Advantageously, the depth of the grooves in the transport direction continuously decreases, i. the grooves run out. By providing said grooves, the coefficient of friction of the conveyed material on the cylinder inner wall in the grooved feed zone of the screw is significantly increased.
    The invention will now be explained in more detail with reference to an embodiment schematically illustrated in the drawing. 1 shows a perspective view of the device according to the invention, FIG. 2 shows a perspective sectional view of the device according to FIG. 1 and FIG. 3 shows a sectional view along a plane running transversely to the extruder screw.
    In Fig. 1, a hopper 1 for fresh granules is shown, the granular task is denoted by 2. The feed hopper has a first cylindrical section 3 and a funnel-shaped, i.e. itself to the discharge 4 towards conically tapered section 5. Connected to the funnel-shaped portion 5 is a cylindrical discharge area 6 having an annular flange 7 on which a funnel-shaped, i.e. is attached to the outlet opening 8 conically tapered transport section 9, which forms a mixing section. The transport section 9 is connected to the delivery pipe 10 of an extruder screw 11.
    As can be seen more clearly in FIGS. 2 and 3, a cyclone 12 is arranged coaxially in the feed hopper 1, the cyclone 12 of which is arranged in the feed hopper 1
    Inlet cylinder 13 protrudes from the hopper 1. In the inlet cylinder 13 opens tangentially a tube 14, via which the cyclone 12, a flow of filling material, in particular of shredded waste is supplied. In the inlet cylinder 13, the introduced flow is brought by tangential blowing on a circular path. By the taper of the subsequent, forming the separation distance cone 15, the rotational speed increases so much that the chips are thrown by the centrifugal force to the cone walls and slowed down to the extent that they detach from the flow and trickle down towards the discharge opening 16. The fluid, in particular air leaves the cone 15 through the central dip tube 17 upwards.
    2 and 3 it can be seen that the cyclone 12, following the cone 15 has a cylindrical conveyor section 18, at the end of which the discharge opening 16 is located. The stuffing screw 19 passes through the cylindrical conveying section 18 and the discharge opening 16 in the axial direction and is connected to a drive shaft 20, which is led out of the cyclone via the dip tube 17. The drive shaft is mounted in a gear 21 which is secured to a platform 22 which is supported by a plurality of uprights 23 on the top wall of the cyclone 12. A motor 24 drives the drive shaft 20 via the gear 21. The plug screw 19 cooperates with the cylindrical conveyor section 18 for the axial removal of the accumulating at the lower end of the cone 15 Schnitzel. Immediately above the cylindrical conveying section 18, i. in the lowermost portion of the cone 15, the stuffing screw 19 has a conical enveloping surface tapering towards the cylindrical conveying portion 18, whereby the degree of filling of the screwing screw 19 can be increased. The stuffing screw 19 further protrudes beyond the discharge opening 16 out of the cyclone 12 and extends into the mixing section formed by the funnel-shaped transport section 9 to the extruder screw 11. In the transport section 9 a maintenance and inspection opening with a tube 25 is provided, via which any Irregularities during operation, such as a blockage can be remedied.
    权利要求:
    Claims (8)
    [1]
    An apparatus for feeding granules and filler material to an extruder screw (11) of an extruder comprising a cyclone (12) having an entry port for introducing a flow of pneumatically conveyed filler material and a discharge port (16) for discharging the flow separated from the flow Filling material, a hopper (1) for the fresh granules and a mixing section (9) to which the filling material and the fresh granules from the feed hopper (1) are fed, characterized in that the cyclone (12) at least partially in the hopper (1) and is arranged coaxially therewith, so that the discharge opening (16) of the cyclone (12) dips into a discharge area (6) of the feed hopper (1) that surrounds the discharge opening (16) in an annular manner, and that a stuffing screw (19) surrounds the discharge opening (16). the cyclone (12) passes axially through and into the mixing section (9) axially adjoining the discharge opening (16) protrudes.
    [2]
    2. Apparatus according to claim 1, characterized in that the shaft (20) of the StopfSchnecke (19) passes through the cyclone (12) axially and is led out via a dip tube (17) from the cyclone (12).
    [3]
    3. Apparatus according to claim 1 or 2, characterized in that the cyclone (12) has a conically tapered separating section (15) and an adjoining cylindrical conveying region (18) through which the StopfSchnecke (19) extends and whose inner diameter in Substantially corresponds to the outer diameter of the plug screw (19).


    [4]
    4. The device according to claim 3, characterized in that the stuffing screw (19) in the lowermost portion of the separating section (15) has a conical, converging in the transport direction enveloping surface.
    [5]
    5. Device according to one of claims 1 to 4, characterized in that the mixing section (9) is funnel-shaped with tapering in the transport direction cross-section.
    [6]
    6. Device according to one of claims 1 to 5, characterized in that the mixing section (9) to the extruder screw (11) connectable outlet opening (8) and that the StopfSchnecke 819) extends to the outlet opening (8).
    [7]
    7. Apparatus according to claim 3 to 6, characterized in that the cylindrical conveying region (18) at its cooperating with the stuffing screw (19) inner periphery extending in the longitudinal direction grooves.
    [8]
    8. Use of a device according to one of claims 1 to 7 for returning incurred in the extrusion process plastic waste, in particular edge strips in the v extruder, wherein the plastic waste detected by their accumulation by mechanical means, transported in a crushing device, shredded and the shredded waste thereafter be supplied with fresh granules of the extruder screw (11).

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    同族专利:
    公开号 | 公开日
    RU2014138936A|2016-04-20|
    CN104520091A|2015-04-15|
    US20150023742A1|2015-01-22|
    AT512170B1|2013-06-15|
    ZA201406766B|2015-11-25|
    EP2819828A1|2015-01-07|
    WO2013126933A1|2013-09-06|
    RU2597610C2|2016-09-10|
    US9227344B2|2016-01-05|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US3645659A|1969-03-13|1972-02-29|Gloucester Eng Co Inc|Extruding plastic|WO2014206912A1|2013-06-26|2014-12-31|Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.|Device and method for introducing fibres into an extruder|US2087464A|1935-12-30|1937-07-20|Air Way Elevator Company Inc|Separator for grain and similar commodities|
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    US3687288A|1970-09-03|1972-08-29|Marco Dev Co Inc|Separator and method|
    US3942842A|1971-08-03|1976-03-09|Young Jr Henry T|Industrial vacuum loading apparatus|
    JPS4977963A|1972-11-30|1974-07-26|
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    US4128404A|1976-04-15|1978-12-05|Pneumatic Force Feeder, Inc.|Method for separating light-weight compressible material|
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    US5160354A|1991-05-14|1992-11-03|Du Pont Canada Inc.|Process and apparatus for extraction and recovery of blowing agents from polymeric foams|
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    AT410298B|2001-06-11|2003-03-25|Bacher Helmut|DEVICE FOR FILLING A SNAIL STORED IN A CASE AND METHOD FOR OPERATING SUCH A DEVICE|
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    US8820214B2|2007-01-04|2014-09-02|The Coca-Cola Company|System and method for producing foamed milk from powder|US9713893B2|2013-07-09|2017-07-25|Wenger Manufacturing, Inc.|Method of preconditioning comestible materials using steam/water static mixer|
    US9878371B2|2014-11-07|2018-01-30|Ge Avio S.R.L.|Powder dispenser for making a component by additive manufacturing|
    EP3436720A4|2016-03-28|2019-11-27|Fange Innova|An apparatus for outputting a solid material, such as entrained in a fluid|
    US20170291364A1|2016-04-11|2017-10-12|Timothy W. Womer|Single screw micro-extruder for 3d printing|
    RU179606U1|2017-06-30|2018-05-18|ООО Полимер НТ|Extruder hopper|
    EP3479992A1|2017-11-01|2019-05-08|Haute Ecole d'Ingénierie et de Gestion du Canton de Vaud |Device and method for recycling plastic materials|
    DE102019216053A1|2019-10-17|2021-04-22|Windmöller & Hölscher Kg|Feeding device and method for feeding fluff and granulate into an extruder|
    CN111117718A|2019-12-03|2020-05-08|江苏高科石化股份有限公司|Dustless production method of narrow-distillation-range low-viscosity insulating oil|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA254/2012A|AT512170B1|2012-02-28|2012-02-28|Device for feeding granules and filling material to an extruder screw of an extruder|ATA254/2012A| AT512170B1|2012-02-28|2012-02-28|Device for feeding granules and filling material to an extruder screw of an extruder|
    US14/381,142| US9227344B2|2012-02-28|2013-02-19|Device for feeding granulate and filler material to an extruder screw of an extruder|
    CN201380011602.0A| CN104520091A|2012-02-28|2013-02-19|Device for feeding granulate and filler material to an extruder screw of an extruder|
    EP13708334.1A| EP2819828A1|2012-02-28|2013-02-19|Device for feeding granulate and filler material to an extruder screw of an extruder|
    RU2014138936/05A| RU2597610C2|2012-02-28|2013-02-19|Device for supply of granulate and loaded material for extruder|
    PCT/AT2013/000030| WO2013126933A1|2012-02-28|2013-02-19|Device for feeding granulate and filler material to an extruder screw of an extruder|
    ZA2014/06766A| ZA201406766B|2012-02-28|2014-09-15|Device for feeding granulate and filler material to an extruder screw of an extruder|
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