• 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:
    Method for simulating an injection molding process, wherein in a machine simulation (MS) for simulating the injection molding machine (2), optionally without injection molding tool, based on a physical behavior model, at least one first parameter, preferably one, volume flow (V) in an injection unit (9) to be simulated of an injection molding machine (2 ) and in a process simulation (PS) for simulating a molded injection molding material and / or an injection molding tool based on a physical model, at least a second parameter, preferably a pressure (p), is calculated in the injection molding material to be simulated, the at least one second parameter being Machine simulation (MS) is miteille and / or the at least one first parameter of the process simulation (PS) is communicated.
    公开号:AT513481A4
    申请号:T1195/2012
    申请日:2012-11-09
    公开日:2014-05-15
    发明作者:Josef Dipl Ing Giessauf
    申请人:Engel Austria Gmbh；
    IPC主号:
    专利说明:

    09/11/2012 09:28 + 43-512-583408 TORGGLER & HOFINGER p. 06/22 72315 32 / gb 1
    The present invention relates to a method for simulating an injection molding process with the features of the preamble of claim 1, a simulation device for simulating an injection molding process with the features of the preamble of claim 13 and an injection molding machine with such a simulation device.
    It is known to simulate injection molding machines, wherein in particular the machine movements are calculated according to the set cycle sequence and the behavior of the drive components. Software of this type serves primarily the training of operators for injection molding machines and the testing of machine software.
    Furthermore, process simulations are known in which the injection molding tool is modeled as a 3D model, and the molding process is simulated beginning with the inflow of the melt, the Nachdruckphase and the cooling down to demoulding of the finished part. For a given geometry of a cavity pressure and temperature can then be calculated in the process simulation for each time of the injection molding process. It is therefore attempted to predict the finished product of Sprttzgießprozesses, for example, shrinkage and distortion is taken into account. The behavior of the injection molding machine itself must be largely ignored in these simulations, the software takes into account only some basic data of the injection molding machine, such as screw diameter, maximum injection speed, maximum injection pressure or maximum closing force. However, since the precise injection behavior, and also the closing behavior during injection compression, has a great influence on the end product of the injection molding process, the accuracy of these process simulations can be improved.
    The object of the invention is to provide a method and a device for simulating an injection molding process, which enables the prediction of the finished product with an accuracy which comes closer to the permitted tolerances of the finished product. 09/11/2012 09:37
    No. 2/2209 P.006 / 022 09/11/2012 09:28 + 43-512-583408 TDRGGLER & HQFINGER P. 07/22 ··· ·· ···· ·· ···· ···· ························································································································································
    This object is achieved by a method having the features of claim 1, by a simulation device having the features of claim 13, and by an injection molding machine having such a simulation device.
    This is done by simultaneously a machine simulation and a process simulation is sensed, wherein the process simulation of the calculated by the machine simulation at least a first parameter - preferably at least one volume flow - is provided and / or the machine simulation of the calculated by the process simulation at least one second parameter - preferably at least one pressure in the cavity - is provided. In other words, all elements essential to the result of the injection molding process are simulated and the results of the simulations exchanged.
    It is standard to perform simulations step by step - ie to discretize the time. Of course, it is also preferably provided in the present invention to exchange the pressure and the volumetric flow and optionally further parameters after each simulation step.
    By improving the accuracy of the simulation achieved by the invention, there are numerous advantages in the manufacture of injection molded parts. By accurately predicting the final product of the injection molding process, it is possible to estimate in advance, for example, the energy requirement during production or the cycle time and thus the expected productivity. The selection of the injection molding machine for a part to be produced can be carried out more reliably due to simulations according to the invention than is possible with process simulations of the prior art. The results of the simulations can also be used with the accuracy achieved to identify the responsible components in case of problems. These can then be exchanged accurately, without having to proceed with the problem-solving according to the trial-error principle. 09/11/2012 09:38
    No. 3 / 22O9 P.007 / 022 09/11/2012 09:28 + 43-512-583408 TORGGLER & HOF INGER p. 08/22 3
    It is preferably provided to simulate the injection molding material together with the injection mold. In this case, the injection mold is to be represented in the process simulation and not in the machine simulation.
    Further embodiments of the invention are defined in the dependent claims.
    In order to optimally detect the thermal situation in the injection molding tool, at least one temperature of an injection mold to be simulated can be calculated in the machine simulation and / or in the process simulation and the at least one temperature of the process simulation and / or the machine simulation can be communicated. Preferably provided here is an embodiment in which the behavior of the tool heating controller is simulated by the machine simulation.
    It can be provided that in the machine simulation at least one position and / or at least one speed of a movable mold clamping plate to be simulated is calculated and that the at least one position and / or the at least one speed is communicated to the process simulation. Likewise, it can be provided that in the machine simulation at least one force is calculated on a mold clamping plate to be simulated and that the at least one force is communicated to the process simulation. Through these measures, the simulation can also be used for the injection-compression molding process. For a particularly accurate return of the results of the process simulation for machine simulation, at least one Auftreibkraft which is affected by the material to be simulated injection molding, and at least one Auftreibkraft the machine simulation can be communicated in the process simulation.
    To perform calculations of volume flows as accurately as possible, it may be provided in the process simulation to simulate the behavior of the injection molding material in a machine nozzle and preferably in a screw antechamber. 09/11/2012 09:38 lr4 / 2209 P.008 / 022 09/22 09/11/2012 09:28 + 43-512-583408 TORGGLER & HOFINGER S. ··· ·· ···· ·· · ··· ······ II ································································· ··· · 4
    It can also be provided that the plasticizing process is simulated in the process simulation or in the machine simulation. The results are, for example, the plasticizing power and / or a temperature distribution and / or a pressure distribution of the molten injection molding material.
    It is furthermore preferably provided that in the machine simulation and / or in the process simulation at least one deformation of a part - in particular of an injection molding tool - of an injection molding machine to be simulated is calculated and that the at least one deformation of the process simulation and / or the machine simulation is communicated. By taking into account the deformation of the entire system, consisting of machine, tool and molded part, the effects of tool breathing and shrinkage can be recorded true to the original.
    Also preferred is an embodiment in which components of the injection molding machine and / or components of the injection molding tool are reproduced in the machine simulation by exchangeable component simulations. This allows a quick adaptation of the simulation by the user.
    In order to create an adjustment data set for an injection molding machine, at least one simulation according to the invention can be carried out and, based on the results, the adjustment data set can be created. It is advantageous to carry out several simulations according to the invention with different sets of initial parameters and then to select the set of initial parameters which produced the best result. In this case, an automated optimization can be carried out specifically, that is, defined input parameters are varied within predetermined limits until certain target variables have reached a desired value. Input parameters may be the setpoint values that can be set on the machine, but also geometrical data of tool or machine components, material data of the injection molding material or the materials occurring in the machine or in the tool. 09/11/2012 09:39
    Nr5 / 2209 P.009 / 022 10/22 09/11/2012 09:28 + 43-512-583408 TORGGLER & HOFINGER S.
    ·························································································· 5
    As target variables, preference is given to defining quality characteristics of the component and / or parameters which influence the productivity of the process (cycle time, energy consumption).
    In this sense, it may be advantageous for experimental plans to be executed automatically, with several simulations according to the invention being carried out with varying initial parameters.
    For reasons of simple operation or for the training of operating personnel, an interface of the machine simulation for inputting parameters can correspond to an input mask of the injection molding machine.
    Protection is also desired for an injection molding machine with a simulation device according to the invention, wherein the simulation device is connected to a control or regulating device of the injection molding machine.
    In this case, it is preferably provided that user-definable parameters of the machine simulation can be accepted by the control or regulating device of the injection molding machine as an adjustment data record. This eliminates the need for manual input of parameters for the injection molding process by the operator.
    Software products for calculating the melting process of plastic granules in screw plasticizing units are available on the market. In addition to material data and the process parameters relevant for plasticizing, these also require the geometric data of the screw. Calculation results include the time course of the plasticizing capacity, the required worm torque and the temperature and pressure distribution in the melt. It can be provided to couple such calculation programs with the virtual machine and / or with the process simulation via suitable interfaces. Again, the input screens of the machine simulation can be used in the simplest case again for the parameterization of plasticizing simulation. 09/11/2012 09:39 lr6 / 2209 P.010 / 022 09/11/2012 09:28 + 43-512-583408 TORGGLER & HOFINGER p. 11/22 ·· ··· ···· ······ · ····· · M ·· · 6 iterative coupling: The machine simulation specifies a screw speed for a first time step. The plasticizer simulation calculates i.a. the plasticizing performance and the required moment, and returns it to the machine simulation. The plasticizing capacity corresponds to the quantity of material plasticized per time. Since this material is conveyed into the auger, the auger moves backwards, a new auger position can be calculated. The required torque, in accordance with the control behavior of the machine, in turn leads to a new speed, which is passed to the plasticizing simulation as the default for the second time step. The loop is repeated until the screw has reached the set metering stroke.
    The results of this coupled simulation are a realistic dosing time and a temperature distribution in the melt, which can be incorporated into the other calculations described.
    Further advantages and details of the invention will become apparent from the figures and the associated description of the figures. Show
    Fig. 1 shows an injection molding machine with a simulation device according to the invention and
    2 shows a flow chart of a simulation method according to the invention.
    In Figure 1, the injection molding machine 2 and schematically the control or control unit 3 and the simulation device 1 is shown. Here, by way of example, a vertically closing closing unit with bars 4, a fixed platen 5 and a movable platen 6 is shown. Of course, the invention can also be used for any other type of closing units. The control or control unit 3 is usually connected to all essential elements of the injection molding machine 2. By way of example, connections to the initial cylinders 13, the locking mechanisms 7, the pressure mechanisms 8 and the injection unit 9 are shown here. P. 011/022 09/11 / 2012 09:39 Nr / ^ 09 09/11/2012 09:28 + 43-512-583408 TORGGLER & HOFINGER p. 12/22 7
    The closing unit is shown here in the open state, whereby a mold half of the injection mold 10 is visible.
    In the simulation apparatus 1, a machine simulation MS and a process simulation PS run, wherein in each simulation step, a pressure p calculated by the process simulation PS is forwarded to the machine simulation MS. Furthermore, at each process step of the
    Machine simulation MS of her calculated volume flow V to the process simulation PS passed. In addition, the following quantities are simulated and exchanged by the machine simulation MS or the process simulation PS: a temperature T of the injection mold, a force F acting on the mold clamping plate 6, a driving force Fa exerted by the melt, a position x and a speed v of the movable mold clamping plate 6 and a deformation Δχ of the injection mold. The temperature T, the force F, the Auftreibkraft Fa and the deformation Δχ can be present as spatially resolved quantities, that is, it can actually for all location coordinates that are relevant to the corresponding variables, a temperature T, a force F, a Auftreibkraft Fa or a deformation .DELTA.χ be replaced.
    The simulation device 1 further has an interface 12 to which parameters for the machine simulation MS can be input. In the ideal case, the interface 12 corresponds to the input mask 11 on the control unit 3 of the injection molding machine 2.
    The control unit 3 of the injection molding machine 2 is connected to the simulation device 1 via a data connection 12. About this data connection 12, it is about possible to pass a set of settings determined by simulation directly to the control or control unit 3 of the injection molding machine 2. The design of the data connection 12 is unimportant. By modern communication networks, for example, arbitrarily large spatial separations of injection molding machine 2 and simulation device 1 could be realized. 09/11/2012 09:40 Ιγ8 / 2239 P.012 / 022 13/22 09/11/2012 09:28 + 43-512-583408 TORGGLER & HOFINGER S. · ♦ ♦ ··· ♦ ··· «« « «·« ·· # ··· ··· »• ♦ ··· ··· · • ♦ · · ♦ · ·« «♦ · ····« · «·· ··· · ♦ ·· ♦ · · 8
    FIG. 2 shows a flowchart of a simulation method according to the invention, with the steps carried out by the machine simulation MS being depicted on the left-hand side and those carried out by the process simulation PS on the right-hand side. By default, the injection of the plastic material is followed by a rate-controlled phase followed by a pressure-controlled phase. In the flowchart shown the required switching by a decision maker E is taken into account.
    In detail, in the first simulation step (t ^ O), a volume flow V is calculated and passed to the process simulation. This then calculates the pressure in the melt and passes it back to the machine simulation MS. After a counter for the simulation steps has been increased, a decision E decides whether to switch from the speed-controlled to the pressure-controlled phase. If not, a new volume flow V is calculated again by the machine simulation MS in the next simulation step.
    If a switch is made, a volume flow V is again calculated in the first simulation step of the pressure-controlled phase (tN * 0) and transferred to the process simulation PS. Again, a pressure p in the melt is calculated and passed on to the machine simulation MS. After the new pressure-controlled phase counter has also been increased, a decision is made as to whether the end of the pressure-controlled phase has been reached. This happens in this embodiment simply over a predetermined number of time steps tN- * oii. if this is answered with no, will in the next
    Simulation step of the pressure-controlled phase again a volume flow V calculated.
    Although it is customary for process simulations PS of the prior art to be delivered in the pressure-controlled phase predetermined pressures. If the setpoint pressures from the machine simulation MS were simply forwarded to the process simulation PS, the machine behavior would remain 09/11/2012 09:40
    Ir 9/22 09 P.013 / 022 09/11/2012 09:28 + 43-512-583408 TORGGLER & HOFINGER p. 14/22
    9 unconsidered. In order to fully exploit the advantages of the invention, this
    Embodiment as well as in the pressure-controlled phase, a volume flow V passed to the process simulation PS.
    When the end of the pressure-controlled phase is reached, the simulation stops.
    Innsbruck, on 09.11.2012 09/11/2012 09:40
    No. 10/229 P.014 / 022
    权利要求:
    Claims (26)
    [1]
    15/22 09/11/2012 09:28 + 43-512-583408 TORGGLER & HOFINGER S. ······································ 1. A method for simulating an injection molding process, wherein - in a machine simulation (MS) for simulating the injection molding machine (2) optionally without Injection mold due to a physical behavior model at least a first parameter - preferably a volume flow (V) - in an injection unit to be simulated (9) of an injection molding machine (2) is calculated and - in a process simulation (PS) for simulating an injection molding material to be processed and / or Injection mold due to a physical model at least a second parameter - preferably a pressure (p) - is calculated in the injection molding material to be simulated, characterized in that the at least one second parameter of the machine simulation (MS) is communicated and / or at least a first parameter of the process simulation (PS) is communicated.
    [2]
    2. The method according to claim 1, characterized in that in the machine (MS) and / or in the process simulation (PS) at least one temperature (T) of an injection mold to be simulated (10) is calculated and the at least one temperature (T) of Process simulation (PS) and / or machine simulation (MS) is communicated,
    [3]
    3. The method according to claim 1 or 2, characterized in that the behavior of a tool heating controller is simulated by the machine simulation (MS).
    [4]
    4. The method according to at least one of claims 1 or 2, characterized in that in the machine simulation (MS) at least one position (x) and / or at least one speed (v) to be simulated moving platen (6) is calculated and that the at least one position (x) and / or the at least one speed (v) of the process simulation (PS) is communicated.
    [5]
    5. The method according to at least one of claims 1 to 4, characterized in that in the machine simulation (MS) at least one force 09/11/2012 09:41 N ri 1/22 9 P.015 / 022 09/11/2012 + 43-512-583408 09:28 TORGGLER & HOFINGER 16/22 p ) is calculated on a mold clamping plate (6) to be simulated and that the at least one force (F) is communicated to the process simulation (PS).
    [6]
    6. The method according to at least one of claims 1 to 5, characterized in that in the process simulation (PS) at least one Auftreibkraft (FA), which is influenced by the simulated injection molding material, is calculated and that the at least one Auftreibkraft (FA) of the Machine simulation (MS) is communicated.
    [7]
    7. The method according to at least one of claims 1 to 6, characterized in that in the process simulation (PS), the flow behavior of the injection molding material in a machine nozzle and preferably in a screw antechamber is modeled.
    [8]
    8. The method according to at least one of claims 1 to 7, characterized in that in the process simulation (PS) or the machine simulation (MS) of the Plasitifiziervorgang - a plasticizing and / or a temperature distribution and / or a pressure distribution of the molten injection molding - is modeled.
    [9]
    9. The method according to at least one of claims 1 to 8, characterized in that in the machine simulation (MS) and / or in the process simulation (PS) at least one deformation (Δχ) of a part - in particular an injection mold (10) - one to be simulated Injection molding machine (2) is calculated and that the deformation (Δχ) of the process simulation (PS) and / or the machine simulation (MS) is communicated.
    [10]
    10. The method according to at least one of claims 1 to 9, characterized in that in the machine simulation (MS) components of the injection molding machine and / or in the process simulation (PS) components of the injection mold are replicated replaceable.
    [11]
    11. A method for producing an adjustment data set for an injection molding machine (2), characterized in that at least one simulation after a 09/11/2012 09:41 No 12/229 P.016 / 022 09/11/2012 09:28 +43 The method according to at least one of claims 1 to 10 is carried out and the setting data record is created on the basis of a simulation result.
    [12]
    12. A method for simulating a test plan, characterized in that repeated method according to at least one of claims 1 to 11 are performed with varying initial parameters.
    [13]
    13. simulation device for simulating an injection molding process, wherein - in a machine simulation (MS) for simulating the injection molding machine (2) optionally without injection mold due to a physical behavioral model at least a first parameter - preferably a volume flow (y) - in an injection unit to be simulated (9) an injection molding machine (2) is calculable and - in a process simulation (PS) for simulating a material to be processed and / or an injection mold based on a physical model at least a second parameter - preferably a pressure (p) in an injection molding material to be simulated - can be calculated, characterized in that the at least one second parameter is retrievable by the machine simulation (MS) and / or the at least one first parameter is retrievable by the process simulation (PS).
    [14]
    14. Simulation device according to claim 13, characterized in that in the machine simulation (MS) and / or in the process simulation (PS) at least one temperature (T) of an injection mold (10) to be simulated is calculable and the at least one temperature (T) of the process simulation (PS) and / or from the machine simulation (MS) is retrievable.
    [15]
    15. Simulation device according to claim 14, characterized in that the behavior of the tool heating controller can be simulated by the machine simulation (MS). 09/11/2012 09:41 No 13/22 9 P.017 / 022 09/11/2012 + 43-512-583408 09:28 18/22 p. TORGGLER & HOFINGER ··· ·· ♦ ··· · ····································································································································································································································
    [16]
    16. Simulation device according to claim 13 or 14, characterized in that in the machine simulation (MS) at least one position (x) and / or at least one speed (v) of a simulated moving Fonmaufspannplatte (6) is calculable and that the at least one position (x) and / or the at least one speed (v) is retrievable by the process simulation (PS).
    [17]
    17. Simulation device according to claim 13, characterized in that in the machine simulation (MS) at least one force (F) can be calculated on a mold mounting plate (6) to be simulated and that the at least one force (F) is from the process simulation (PS) is available.
    [18]
    18. Simulation device according to claim 13, characterized in that in the process simulation (PS) at least one Auftreibkraft (Fa), which is influenced by the simulated injection molding material, is calculable and that the at least one Auftreibkraft (FÄ) of the machine simulation (MS) is retrievable.
    [19]
    19, simulation device according to at least one of claims 13 to 18, characterized in that in the process simulation (PS), the flow behavior of the injection molding material in a machine nozzle and preferably in a screw antechamber is simulated.
    [20]
    20. Simulation device according to at least one of claims 13 to 19, characterized in that in the process simulation (PS) or the machine simulation (MS) of the plasticizing - a plasticizing and / or a temperature distribution and / or a pressure distribution of the molten injection molding material - is simulated.
    [21]
    21. Simulation device according to claim 13, characterized in that in the machine simulation (MS) and / or in the process simulation at least one deformation (Δ *) of a part - in particular of an injection mold (10) - of an injection molding machine 09 to be simulated / 11/2012 09:42 Nri4 / 229 P.018 / 022 09/11/2012 09:28 + 43-512-583408 TORGGLER & HOFINGER p. 19/22 ·· ··········· 2 (2) is calculable and that the at least one deformation (Δ *) from the process simulation (PS) and / or from the machine simulation ( MS) is retrievable.
    [22]
    22. Simulation device according to at least one of claims 13 to 21, characterized in that in the machine simulation (MS) components of the injection molding machine and / or in the process simulation (PS) components of the injection mold are exchangeable simulated.
    [23]
    23. A simulation device according to claim 13, wherein an injection molding process using an injection molding machine with an input mask for data input is simulated, and wherein the simulation device has an interface for inputting parameters for the data input Machine simulation (MS) comprises, characterized in that the interface (12) of the machine simulation (MS) of the input mask (11) of the injection molding machine (2) corresponds.
    [24]
    24. Simulation device according to at least one of claims 13 to 23, characterized in that the simulation of an injection molding process with varying initial parameters is repeatable.
    [25]
    25. Injection molding machine with simulation device according to at least one of claims 13 to 23, characterized in that the simulation device (1) with a control or regulating device (3) of the injection molding machine (2) is connected.
    [26]
    26. Injection molding machine according to claim 25, characterized in that input parameters of the machine simulation (MS) of the control or regulating device (3) of the injection molding machine (2) as Einstelldatensat2 are übermehmbar. Innsbruck, on 09.11.2012 09/11/2012 09:42 Nr15 / 22 9 P.019 / 022
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    ATA1195/2012A|AT513481B1|2012-11-09|2012-11-09|Simulation device and method|ATA1195/2012A| AT513481B1|2012-11-09|2012-11-09|Simulation device and method|
    DE201310016914| DE102013016914A1|2012-11-09|2013-10-11|Method for simulating injection molding process of injection molding machine, involves notifying parameters of process simulation unit for entering parameters of machine simulation unit corresponding to input mask of machine|
    CN201310551682.0A| CN103802265B|2012-11-09|2013-11-08|Simulating device and method|
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