• 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:
    Plasticizing unit (1) for a molding machine, comprising a plasticizing cylinder (2), the plasticizing cylinder (2) having a feed zone (3) and a feed opening (4) adjacent to the feed zone (3) for a material to be plasticized, between the feed zone (3) and the filling opening (4) a thermal separation device is arranged and wherein an active temperature control device for the filling opening (4) is provided, wherein the active temperature control at least one tempering (5) and that the temperature control the temperature control (5) during operation flows through the active temperature control turbulent.
    公开号:AT518393A4
    申请号:T50314/2016
    申请日:2016-04-12
    公开日:2017-10-15
    发明作者:Ing Dirneder Franz；Ing Dr Friedrich Johannes Kilian Dipl；Ing Florian Porod Dipl；Ing Robert Strasser Dipl
    申请人:Engel Austria Gmbh；
    IPC主号:
    专利说明:

    The present invention relates to a plasticizing unit for a forming machine having the features of the preamble of claim 1 and claim 14 and a forming machine having such a plasticizing unit.
    Depending on the material, a temperature of the plasticizing in the form of a cooling or a Fleizung may be required.
    In generic forming machines, the material to be plasticized (eg plastic granulate or powder, metal powder, etc.) is subjected to shear forces in the plasticizing cylinder, which is associated with heat generation. This can have the disadvantageous effect that the material to be plasticized in the region of the filling opening and in the feed zone can partially melt and stick together, which changes the grain size in the case of a granular material, which affects the feed behavior in an unpredictable way. It can even come to a laying of the filling hole by molten material.
    It is already known to provide the filling opening with an active temperature control device and additionally to arrange a thermal separating device between the feed zone and the filling opening. Such a plasticizing unit is apparent, for example, from WO 2008/000613 A1.
    The disadvantage is that with the active temperature control device shown in the above-mentioned document, the temperature of the filling opening can be varied only in a very narrow range.
    Generic plasticizing units for a forming machine having a plasticizing cylinder may include an operator operable adjusting device for adjusting a position of a nozzle of the plasticizing cylinder. Here there is the problem that, due to incorrect operation of the setting device, unacceptably large mechanical stresses can occur in the plasticizing cylinder, which can be problematical, especially in combination with a thermal separating device.
    The object of the invention is to provide a plasticizing unit of the generic type in which the filling opening can be heated to a great extent without having to constructively modify the plasticizing cylinder and / or a construction of unacceptably high mechanical stresses is prevented by incorrect operation of a setting device and a shaping machine with such a device plasticizing.
    This object is achieved by a plasticizing unit for a forming machine having the features of claim 1 and / or claim 14 and a forming machine with such a plasticizing unit. Advantageous embodiments of the invention are defined in the dependent claims.
    Examples of tempering are liquids, especially water and oil.
    The generation of a turbulent flow in the at least one temperature control can be done in various ways (in isolation or any combination): "The at least one tempering can be formed so that a
    Reynolds number greater than 2300 is given. Constructively, this z. B. be achieved so that the at least one tempering is formed as rough as possible or coated so that the roughness of the coming into contact with the tempering medium surfaces is increased. "The conveying device may convey the tempering medium at a pressure and / or a speed which is or are sufficient for a turbulent flow - A device for generating a turbulent flow may be arranged in at least a portion of the at least one tempering line. This may be, for example, a mechanical element, an ultrasonic sensor, a magnetic field when using a conductive medium as tempering medium, etc.
    It is preferably provided that the at least one temperature control is arranged at least partially in a jacket of the plasticizing and / or at least partially in a arranged on the plasticizing component - preferably a tempering - is arranged.
    It is preferably provided that the at least one tempering line extends at least over part of a circumference of the plasticizing cylinder, preferably extends only over part of a circumference of the plasticizing cylinder. Runs the at least one tempering only over part of the circumference of the plasticizing, even in that region of the plasticizing, in which runs the at least one tempering, still enough space for the arrangement of different components, such. B. terminals, sensors and the like.
    It can be provided that at least one sacrificial anode (which prevents corrosion of the at least one tempering line) is arranged in the at least one tempering line. This has the advantage that the sacrificial anode is integrated into the at least one temperature control line and the material around the plasticizing cylinder is flowed around by the temperature control medium and contacted directly electrically (without a separate electrical connection would have to be made).
    It is preferably provided that a stopper closing the at least one tempering line is designed as a sacrificial anode. The sacrificial anode so also funnels as a plug.
    It is preferably provided that the thermal separation device is designed in the form of a thermal separating groove. This represents a structurally particularly advantageous possibility of reducing a heat flow from the feed zone into the region of the feed opening, because in this way the thermal separator is integrated in the plasticizing cylinder and air constitutes a good thermal insulator.
    It can be provided to connect the functions of the thermal separating groove and the at least one tempering line. For example, it can be provided that the thermal separating groove has a the at least one tempering line exhibiting
    Component, preferably a tube, or that the thermal separation groove together with a cover which forms at least one tempering.
    It is preferably provided that the thermal separation groove is formed in the form of circumferentially spaced apart from the plasticizing cylinder segments. This increases the mechanical stability of a provided with a thermal separating groove plasticizing.
    It may be provided that the shape of the thermal separation groove is selected such that a maximum mechanical stress of the plasticizing remains below a yield point of the material of the plasticizing. Examples of possible forms of the thermal separation groove are: "the separation groove has a constant radius of curvature" the separation groove has a varying radius of curvature (eg triangle with radius at the lowest point, clothoids, curved flanks and a straight groove bottom)
    A variant of the invention relates to a plasticizing unit for a molding machine with a plasticizing and operable by an operator adjustment for adjusting a position of a nozzle of the plasticizing It is provided that the vornehmable by means of the adjustment setting of the plasticizing cylinder is limited such that during operation mechanical stresses be kept below a predetermined value in the plasticizing cylinder. This can be done in various ways: It can be provided that the adjustment device is designed to be motor-driven and that the adjustment that can be made by means of the adjustment device is limited in a control of the adjustment device. "It may be provided that the setting of the plasticizing cylinder which can be effected by means of the adjusting device is limited by a mechanical stop for the adjusting device or the plasticizing cylinder, the mechanical stop being positioned so that the mechanical stresses are acceptable at the stop of the adjusting device or the plasticizing cylinder Values are limited. "It can be provided that the setting of the plasticizing cylinder, which can be effected by means of the adjusting device, is limited by a shaping of a mechanical actuator of the adjusting device. For example, the dimensioning (radius and eccentricity) of an actuator designed as an eccentric be chosen to be correspondingly small or it may be limited in a screw designed as an actuator, the length of a thread in which the threaded screw is screwed, or a length of the threaded screw itself.
    This variant of the invention is particularly advantageous in combination with the first variant of the invention, especially when the thermal separation zone is formed as a separating groove, since in such a case, the mechanical stability of the plasticizing is already reduced by the presence of the separating groove.
    Embodiments of the invention will be discussed with reference to the figures. Show it:
    1 shows a plasticizing unit according to the invention in an isometric view with a frame, a running rail and an adjusting device. FIG. 2 shows a side view of FIG. 1
    3 is a detail view of FIG. 1
    4 shows a further detail view of FIG. 1
    5a, 5b is a schematic view of a detail of a plasticizing unit according to the invention with tempering
    Fig. 6 is a sectional view through the plasticizing cylinder of FIG. 1 transverse to the longitudinal axis of the plasticizing
    Fig. 7 is a further sectional view through the plasticizing cylinder of Fig. 1 in the direction of the longitudinal axis of the plasticizing cylinder Fig. 8 is a sectional view through a further embodiment of a
    Plasticizing cylinder of Fig. 1 transverse to the longitudinal axis of the plasticizing
    9a-e further sectional views through various embodiments of the plasticizing of Fig. 1 in the direction of the longitudinal axis of the plasticizing
    10 shows a sectional view through a further embodiment of a plasticizing cylinder of FIG. 1 transverse to the longitudinal axis of the plasticizing cylinder
    1 shows a plasticizing unit 1 according to the invention of a forming machine (here: injection molding machine) with a plasticizing cylinder, a hopper 20 for the material to be plasticized and a machine bed 25. Shown is also a platen 21 for a tool part, which together with at least one further tool part, which is arranged on at least one further clamping plate (not shown) forms a cavity into which the plasticized material can be injected via a nozzle 10 of the plasticizing cylinder 2. The clamping plate 21 is part of a not shown because of the prior art closing unit of the molding machine. The filling hopper 20 is in communication with a filling opening 4, not visible in FIG. 1, which is formed on the plasticizing cylinder (see FIG. 5a). Immediately to the filling opening 4 is followed (in Fig. 1, left below the hopper 20) to a feed zone 3 of the plasticizing cylinder 2 at. The plasticizing cylinder 2 is located in the region of the nozzle 10 loosely on the machine bed 25 and can be adjusted slightly relative to this.
    2 shows a part of an adjusting device 23, which is arranged here on both sides of the plasticizing cylinder 2 (see FIGS. 3 and 4) and serves to adjust the position of the nozzle 10 of the plasticizing cylinder 2 in a horizontal plane. In each case, a mechanical actuator 24 in the form of a rotatably mounted eccentric is provided, wherein the dimensioning (radius and eccentricity) of each of the two eccentrics is limited so that during operation mechanical stresses in the plasticizing cylinder 2 are kept below a predetermined value even with the greatest possible adjustment. Upon actuation of the eccentric, depending on the selected extent of rotation, the nozzle 10 in Fig. 2 moves slightly more into or out of the sheet plane. A rotation of the eccentric can be done here by means of a hexagon 22, of course, other possibilities for attacking an adjustment tool are possible.
    Can not be seen in Fig. 2, because within a protective cover of the plasticizing cylinder 2 is arranged an adjusting device 23, which a
    Adjustment of the position of the nozzle 10 of the plasticizing cylinder 2 in a vertical plane is used. This can as well as the adjustment device 23 for the adjustment in the horizontal plane have a rotatably mounted eccentric and acts from below the plasticizing cylinder 2 on this. The dimensions (radius and eccentricity) of the eccentric are limited so that mechanical stresses in the plasticizing cylinder 2 are kept below a predetermined value even with the greatest possible adjustment during operation. A rotation of the eccentric can be done by means of a hexagon 28, of course, other possibilities for attacking an adjusting tool are possible.
    5a shows a first example of an active temperature control device for the filling opening 4 of the plasticizing cylinder 2. In a housing of the tempering device 13, a pumping device 14 and a heat exchanger 15 are arranged here. Temperierte tempering is conveyed by the conveyor 14 via a flow 11 of the temperature control to at least one temperature control line 5 not visible here. After flowing through the at least one tempering 5, the temperature control is brought via a return 12 to the heat exchanger 15. The heat exchanger 15 is maintained at a desired temperature via a feed 16 and a drain 17 in a manner known per se. Of course, the heat exchanger 15 is not necessarily required.
    A trained as a pump conveyor 14 is not essential. The required pressure for the temperature control can z. B. from a service network or public network for the tempering (preferably water or oil) come. In this case, the service network or public network forms the conveyor 14.
    FIG. 5 b shows a further exemplary embodiment of an active temperature control device for the filling opening 4 of the plasticizing cylinder 2. A flow controller 19 controllable by a controller 27 is arranged in the supply line 11, by means of which the flow of the temperature control medium can be regulated by the at least one temperature control line 5. The controller 27 may be in communication via a control line 18 with a machine controller of the forming machine or may be formed as part of the machine control. In the flow 11 and in the return 12 sensors 26 (eg, for flow, pressure and / or temperature) are arranged. The controller 27 may deliver the temperature control medium at a pressure and / or velocity sufficient for a turbulent flow in the at least one temperature control line 5.
    The embodiments according to FIGS. 5a and 5b can also be used in combination.
    Fig. 6 shows a cross section transverse to the longitudinal axis of the plasticizing cylinder 2 in a region between the feed zone 3 and the filling opening 4. It can be seen that here the tempering 5 is formed in the form of three straight segments in such a way that the tempering 5 only over a part of a circumference of the plasticizing 2 runs. The individual sections are closed to the outside by grafting 9, so that no tempering medium can escape. The diameter of the individual sections is selected such that turbulence occurs for the tempering medium used in a certain speed range. To support the surface of the tempering 5 may be formed roughened or coated accordingly.
    In the embodiment according to FIG. 7, the thermal separating groove 6, together with a cover 8, forms the at least one tempering line 5.
    In the embodiment according to FIG. 8, a plug 9 closing the at least one tempering line 5 is designed as a sacrificial anode 7.
    FIGS. 9a to 9e show various embodiments of a thermal separating device in the form of a separating groove 6:
    In Fig. 9a, the separating groove 6 has a constant radius of curvature.
    In Fig. 9b, the separating groove 6 has a constant radius of curvature, which is selected to be larger than in Fig. 9a.
    In Fig. 9c, the separating groove 6 has a varying radius of curvature, in the form of a triangle with a radius at the lowest point.
    In Fig. 9d, the separating groove 6 has a varying radius of curvature, with curved flanks and a straight groove bottom.
    In Fig. 9e, the separating groove 6 has a varying radius of curvature, in the form of a clothoid.
    In FIG. 10, a device 22 for generating a turbulent flow is arranged in a section of the at least one temperature control line 5.
    REFERENCE NUMBER: 1 plasticizing 2 plasticizing 3 Feeding zone 4 sacrificial anode 8 cover 9 grafting 10 sacrificial anode 8 cover 9 grafting 10 nozzle of the plasticizing 11 flow of the tempering 12 return of the tempering 13 housing of the temperature control device 14 conveyor 15 heat exchanger 16 inflow of the heat exchanger 17 outflow of the heat exchanger 18 control line 19 Flow regulator 20 Filling funnel 21 Clamping plate 22 Device for generating a turbulent flow 23 Adjusting device 24 Actuator of the adjusting device 25 Machine bed 26 Sensors 27 Control for flow regulator 28 Hexagon
    权利要求:
    Claims (18)
    [1]
    claims:
    1. plasticizing unit (1) for a molding machine, with a plasticizing cylinder (2), wherein the plasticizing cylinder (2) has a feed zone (3) and an adjacent to the feed zone (3) arranged filling opening (4) for a material to be plasticized, wherein between the feed zone (3) and the filling opening (4) is arranged a thermal separation device and wherein an active temperature control device for the filling opening (4) is provided, characterized in that the active temperature control at least one tempering (5) and that the tempering the Temperierleitung (5) flows through turbulent during operation of the active temperature control device.
    [2]
    2. plasticizing unit according to claim 1, wherein the at least one tempering (5) is formed such that a Reynolds number greater than 2300 is given.
    [3]
    3. plasticizing unit according to at least one of the preceding claims, wherein a conveying device (14) for conveying a tempering through the tempering (5) is provided.
    [4]
    4. plasticizing unit according to the preceding claim, wherein the conveying device (14) promotes the temperature control medium at a pressure and / or a speed or are sufficient for a turbulent flow.
    [5]
    5. plasticizing unit according to at least one of the preceding claims, wherein at least in a portion of the at least one tempering line (5) is arranged a device (21) for generating a turbulent flow.
    [6]
    6. plasticizing unit according to at least one of the preceding claims, wherein the at least one tempering (5) at least partially in a jacket of the plasticizing (2) is arranged and / or at least partially in a plasticizing cylinder (2) arranged component-preferably a tempering - arranged is.
    [7]
    7. plasticizing unit according to at least one of the preceding claims, wherein the at least one tempering (5) extends over at least part of a circumference of the plasticizing cylinder (2), preferably only over part of a circumference of the plasticizing cylinder (2).
    [8]
    8. plasticizing unit according to claim 1, wherein at least one sacrificial anode is arranged in the at least one tempering line, it being preferably provided that a plug (9) occluding the at least one tempering line (5) serves as sacrificial anode (5). 7) is formed.
    [9]
    9. plasticizing unit according to at least one of the preceding claims, wherein the thermal separating device in the form of a thermal separating groove (6) is formed.
    [10]
    10. plasticizing unit according to the preceding claim, wherein the thermal separating groove (6) has a the at least one tempering (5) exhibiting component, preferably a tube, or the thermal separation groove (6) together with a cover (8) the at least one tempering ( 5) is formed.
    [11]
    11. plasticizing unit according to at least one of the two preceding claims, wherein the thermal separating groove (6) in the form of circumferentially of the plasticizing cylinder (2) spaced apart segments is formed.
    [12]
    12. plasticizing unit according to at least one of claims 9 to 11, wherein the shape of the thermal separating groove (6) is selected such that a maximum mechanical stress of the plasticizing cylinder (2) below a yield strength of the material of the plasticizing (2) remains.
    [13]
    13. plasticizing unit according to at least one of claims 1 to 8, wherein the thermal separating device is in the form of a thermal insulating.
    [14]
    14. Plasticizing unit (1) for a forming machine, in particular according to at least one of the preceding claims, comprising a plasticizing cylinder (2) and an operator-operable adjusting device (23) for adjusting a position of a nozzle of the plasticizing cylinder (2), characterized in that the setting of the plasticizing cylinder (2) which can be effected by means of the setting device (23) is limited such that, during operation, mechanical stresses in the plasticizing cylinder (2) are kept below a predetermined value.
    [15]
    15. plasticizing unit according to the preceding claim, wherein the adjusting device (23) is designed to be motorized and by means of the adjusting device (23) vornehmbare setting in a control of the adjusting device (23) is limited.
    [16]
    16. plasticizing unit according to claim 14, wherein the by means of the adjusting device (23) vornehmbare setting of the plasticizing cylinder (2) by a mechanical stop for the adjusting device or the plasticizing cylinder (2) is limited.
    [17]
    17. plasticizing unit according to claim 14, wherein the means of the adjusting device (23) vornehmbare setting of the plasticizing cylinder (2) by a shaping of a mechanical actuator (24) of the adjusting device is limited.
    [18]
    18. Forming machine with a plasticizing unit (1) according to at least one of the preceding claims.
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    JP6557296B2|2017-07-27|2019-08-07|ファナック株式会社|Injection molding machine|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA50314/2016A|AT518393B1|2016-04-12|2016-04-12|Plasticizing unit for a molding machine|ATA50314/2016A| AT518393B1|2016-04-12|2016-04-12|Plasticizing unit for a molding machine|
    KR1020170046666A| KR101958546B1|2016-04-12|2017-04-11|Plasticizing unit for a molding machine|
    US15/484,443| US10525625B2|2016-04-12|2017-04-11|Plasticizing unit including a thermal separating device and an active tempering device|
    DE102017003525.3A| DE102017003525A1|2016-04-12|2017-04-11|Plasticizing unit for a molding machine|
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