• 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:
    The invention relates to a starting valve for a granulating device having a housing (1) and a cylindrical switching slide (2) displaceably passing through the housing (1), which has a feed (6) for a plastic melt, optionally with a melt outlet (7) or a granulation head Granulating device connects. In order to ensure a tight passage of the changeover slide (2) through the housing (1), it is proposed that one of the two valve parts formed on the one hand by the housing (1) and on the other by the changeover slide (2) on both sides of the inlet (6) for the plastic melt a conical annular recess (9), open against the respective other valve part, for a sealing ring (10) which can be acted upon axially by a pressure ring (11).
    公开号:AT513247A4
    申请号:T50565/2012
    申请日:2012-12-06
    公开日:2014-03-15
    发明作者:
    申请人:Econ Gmbh；
    IPC主号:
    专利说明:

    1
    (38775) II
    The invention relates to a starting valve for a granulating device with a housing and a housing displaceably passing through, cylindrical change-over slide, which connects an inlet for a plastic melt optionally with a melt flow or a granulation of the granulator.
    The screw extruders of Granuliereinrichtungen downstream Anfahrventile have the task of redirecting the melt strand in the start-up position until the requirements for a proper granulation process corresponding melt strand can be ensured. Therefore, the switch slide mounted axially displaceably in a housing generally has two switch positions in which the melt feed from the extruder is connected either to a melt outlet opening into a collecting container or to the granulation head connected to the starting valve. Due to the displaceable mounting of the changeover spool in the housing, there is the danger, in particular in the transition region between the two switch positions, that due to the delivery pressure on the melt strand, low-viscosity melt penetrates into the sliding gap between changeover spool and housing and passes through this sliding gap to the outside. In this context, it should be noted that the changeover spool is usually heated, so that considerable temperature loads can be expected that affect the tight implementation of the changeover spool through the housing.
    The invention is therefore the object of a start-up valve of the type described in such a way that despite the difficult Betriebsbedingun-2/10 2 conditions a tight passage of the changeover can be ensured by the housing.
    The invention solves this problem in that one of the two formed on the one hand by the housing and on the other hand by the switching valve parts on both sides of the inlet for the plastic melt has an open against the other valve member, conical annular recess for a sealing ring, which can be acted upon axially via a pressure ring is.
    Due to the conical annular recess receiving the sealing ring, the sealing ring is pressed radially against the respectively adjacent, other valve part during axial loading along the conical surface, so that the changeover slide is sealed against the housing on both sides of the inlet for the plastic melt. With an adapted axial loading of the sealing ring thus also the occurring heat loads of the changeover spool and the housing can be considered. Thus, a melt outlet from the housing of the starting valve is prevented in a simple way.
    The cross section of the sealing ring can be chosen differently per se, because the conical surface of the annular recess inevitably has a radial Beaufschlagungskomponente at an axial loading of the sealing ring. Particularly advantageous construction conditions arise, however, if the sealing ring has a wedge-shaped cross-section with a matched to the opening angle of the conical annular recess wedge angle, because in this case, the surface load of the sealing ring can be kept relatively small.
    In order to create simple construction conditions, the housing may have on the passing through the changeover slide end faces open against the changeover slide, conical annular recess for the sealing ring. Thus, the change-over slide penetrates the housing on both end faces liquid-tight. But it is also possible not to assign the sealing ring to the housing, but the change-over, because it is only about the switching slide 3/10 3 to perform tightly in the housing. For this purpose, the change-over slide at both ends may have an annular shoulder forming the annular recess, wherein the pressure ring provided on a head piece engages around the front end of the change-over slide. Even with this slightly more complex construction, the tight recording of the changeover spool is ensured in the housing, thus preventing a melt outlet from the housing.
    In the drawing, the subject invention is shown, for example. Show it
    1 is a start-up valve according to the invention in a schematic axial section,
    Fig. 2 of this approach valve fragmentary in the region of a sealing ring in axial section on a larger scale and Fig. 3 is a corresponding to Fig. 1 representation of an embodiment of a starting valve according to the invention in a larger scale.
    The starting valve has, according to FIGS. 1 and 2, a housing 1, which is penetrated by a switching slide 2. This switching slide 2 is actuated via the piston rod 3 of a control cylinder, not shown, and has two flow channels 4 and 5, the melt flow of a connected to the inlet 6 screw extruder optionally with a formed in the embodiment by the flow channel 5 itself melt flow 7 or a granulating a connect to a feed channel 8 of the housing 1 connected granulator. In the approach position of the starting valve shown in FIG. 1, the melt stream is conveyed via the melt outlet 7 into a collecting tank until the melt stream meets the requirements for the subsequent granulation of the granulating device. By actuation of the actuating cylinder, the change-over slide 2 is axially displaced via the piston rod 3 in the housing 1, so that the flow channel 4 of the change-over slide 2 connects the inlet 6 with the feed channel 8 of the housing 1, whereby the granulating head of the connected granulating device is put into operation. 4/10 4
    In order to prevent the risk of leakage of the plastic melt from the housing 1, the housing 1 is provided on the penetrated by the change-over slide 2 end faces, each with a seal. According to FIG. 2, this seal comprises a conical annular recess 9 surrounding the change-over slide 2 and open against the change-over slide 2, into which a sealing ring 10 is inserted. This sealing ring 10 is preferably provided with a wedge-shaped cross section whose wedge angle corresponds to the opening angle of the conical annular recess 9. The sealing ring 10 is acted upon via a pressure ring 11 by means of clamping screws 12 in the axial direction, so that the sealing ring 10 is displaced along the conical surface of the annular recess 9. This axial displacement is accompanied by a radial displacement, which causes a tight abutment of the sealing ring 10 on the jacket of the changeover slide 2, wherein the passage of the changeover slide 2 is sealed by the housing 1 of the Anfahrventils on the two end faces advantageous against a melt outlet.
    In contrast to FIG. 1, according to the exemplary embodiment according to FIG. 3, the sealing ring 10 is not assigned to the housing 1 but to the change-over slide 2. The change-over slide 2 forms for this purpose at its two ends a re-entrant, the annular recess 9 forming conical annular shoulder to which the wedge-shaped in cross-section sealing ring 10 applies. For axial loading of the sealing rings 10 are in turn pressure rings 11, which are provided on head pieces 13 and engage around the respective end face of the change-over. With the axial loading of the sealing rings 10 via the head pieces 13, the sealing rings 10 are displaced along the conical annular recesses 9 radially outwardly against the wall of the receiving bore of the housing 1 for the changeover, resulting in a corresponding sealing of the changeover in the receiving bore of the housing 1 result Has.
    As a sealing ring 10 corresponding rings made of aluminum, brass, but also depending on the melt temperature temperature-resistant, fiber-reinforced plastics can be used in low-melting plastics. The material of the sealing rings 10 must have sufficient deformability for the sealing effect in conjunction with the conical surface of the annular recess 9. 6.10
    权利要求:
    Claims (4)
    [1]
    Patent Attorneys Dipl.-Ing. Helmut Hübscher Dipl.-Ing. 1. Anfahrventil for a granulating device with a housing (1) and a housing (1) displaceably passing through, cylindrical change-over valve (2) having an inlet (6) for a Plastic melt either with a melt flow (7) or a granulating combines the granulator, characterized in that one of the two on the one hand by the housing (1) and on the other hand by the Umschaltschieber (2) formed valve parts on both sides of the inlet (6) for the plastic melt against the other valve part open, conical annular recess (9) for a sealing ring (10) which is acted upon axially via a pressure ring (11).
    [2]
    2. Starting valve according to claim 1, characterized in that the sealing ring (10) has a wedge-shaped cross-section with a wedge angle adapted to the opening angle of the conical annular recess (9).
    [3]
    3. start-up valve according to claim 1 or 2, characterized in that the housing (1) on the switching slide (2) penetrated end faces against the changeover slide (2) open, conical annular recess (9) for the sealing ring (10).
    [4]
    4. Anfahrventil according to claim 1 or 2, characterized in that the changeover slide (2) at both ends of the annular recess (9) forming, re-entrant annular shoulder and that on a head piece (13) provided pressure ring (11) the front end of the Switching slide encompasses. Linz, December 06, 2012 ECON GmbH by: / Dl Helmut Hübscher / (electronically signed) 7/10
    类似技术:
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    同族专利:
    公开号 | 公开日
    WO2014085842A1|2014-06-12|
    DE112013005847A5|2015-08-20|
    AT513247B1|2014-03-15|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    US4283062A|1979-12-26|1981-08-11|Cincinnati Milacron Inc.|Hydraulic injection molding machine stuffing box|
    US5439589A|1994-05-09|1995-08-08|Trafalgar House Inc.|Sealing means for slide plate screen changer|
    DE2814113C2|1978-04-01|1982-09-23|Werner & Pfleiderer, 7000 Stuttgart|Device for granulating plastic strands|
    DE3815897C2|1988-05-10|1995-05-04|Werner & Pfleiderer|Screw machine with start valve and throttle|
    US6609819B2|2001-07-24|2003-08-26|Wenger Mfg|Twin screw extruder with conical non-parallel converging screws|
    US6773739B2|2002-08-30|2004-08-10|Wenger Manufacturing, Inc|Method and apparatus for extrusion of food products including back pressure valve/diverter|
    DE10312187B4|2003-03-19|2007-10-04|Rieter Automatik Gmbh|Nozzle arrangement of an underwater granulator|
    DE202009011114U1|2009-08-14|2010-12-30|Gala Industries Inc.|Granulating device and start-up valve for this purpose|
    DE202011106715U1|2011-10-12|2012-01-19|Maag Pump Systems Gmbh|Device for distributing a plastic melt|TW201508195A|2013-05-01|2015-03-01|Invista Tech Sarl|Additive injection zone valve|
    DE102018215613A1|2018-09-13|2020-03-19|Robert Bosch Gmbh|Method and device for producing a polymer film|
    DE102018216149A1|2018-09-21|2020-03-26|Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V.|Device for influencing the volume flow of extruded plastically deformable material|
    EP3854565A1|2020-01-21|2021-07-28|Aurotec GmbH|Valve and method of transporting fluids|
    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50565/2012A|AT513247B1|2012-12-06|2012-12-06|Starting valve for a granulating device|ATA50565/2012A| AT513247B1|2012-12-06|2012-12-06|Starting valve for a granulating device|
    DE112013005847.2T| DE112013005847A5|2012-12-06|2013-12-05|Starting valve for a granulating device|
    PCT/AT2013/050235| WO2014085842A1|2012-12-06|2013-12-05|Start-up valve for a granulator|
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