• 专利附录
  • 专利说明
  • 权利要求
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    • 专利摘要:
    Method for quantifying process fluctuations (Pi) in an injection process of an injection molding machine (1), which has an injection device (2), in particular a screw (2), displaceable over a plurality of positions (x), wherein at least one mathematical transformation (Uk) which is provided as a function of at least one arbitrary transformation parameter (uj) an output function (fA) in an image function (fB) is provided, the at least one transformation parameter (uj) is associated with a process variation (Pi), - at least a part at least one variable (pe, ps, pi, Ti) characteristic of the injection process is measured for a plurality of positions (x) of the injection device (2) and a measurement function (fM) is formed by assigning the respective measured values to the respective positions, a reference function (fR) is provided which, for each of the positions (x) of the insert ritzvorrichtüng (2), in which the characteristic size (pe, ps, pi, Ti) was measured, has a predetermined value, - the measuring function (fM) as an output function (fA) for the at least one provided mathematical transformation (Uk) used wherein the at least one arbitrary transformation parameter (uj) of said at least one mathematical transformation (Uk) is determined so that the resulting image function (fB) matches the reference function (fR) with respect to a predetermined error measure as best as possible, and the transformation parameter ( uj) associated with the reference function (fR) is quantified using the at least one transformation parameter (uj).
    公开号:AT511391A1
    申请号:T15182011
    申请日:2011-10-18
    公开日:2012-11-15
    发明作者:Georg Dipl Ing Dr Pillwein
    申请人:Engel Austria Gmbh；
    IPC主号:
    专利说明:

    »» · · · 1 70376 31 / er
    The invention relates to a method for quantifying process fluctuations in an injection process of an injection molding machine which has an injection device, in particular a screw, displaceable over a plurality of positions. The invention further relates to an injection molding machine having an injection device displaceable over a plurality of positions, in particular a screw, a measuring device for measuring the positions of the injection device, at least one measuring device for measuring at least one variable characteristic of the injection process of the injection molding machine, at least one cavity and a control - And / or control device for carrying out the method according to the invention.
    It should be noted that as an injection device instead of a screw, e.g. also a piston can be used.
    An injection molding process is usually subject to certain process variations, even if the injection motion can be accurately reproduced from cycle to cycle. These process variations adversely affect molding quality such as the weight constancy of the injection molded parts, from. In particular, two process variations play a role: On the one hand, fluctuations in the shot volume and, on the other hand, fluctuations in the pressure requirement for filling the cavity of a tool or of several cavities in the case of a multiple tool. The former are caused, for example, by variations in the metering process, such as Variations in the metering stroke, subsequent flow of plastic melt from the area of the plasticizing screw after the compression relief and / or differences in the closing behavior of the non-return valve, such as, for example, different closing times, caused. Variations in the pressure requirement for filling the cavity or the cavities are e.g. due to changes in material viscosity, i.a. caused by batch fluctuations of the plastic granules used, changes in the melt temperature and / or changes in the mold temperature. For individual process fluctuations, there are already approaches to recognize these and subsequently compensate them. For example, DE 10 2008 037 098 A1 discloses a method for detecting or compensating for variations in the closing behavior of the non-return valve. However, this is a relatively complicated method that requires special process control variants using a closure nozzle. Furthermore, methods for detecting or compensating for viscosity fluctuations are known.
    The disadvantage of all these approaches is that they are only aimed at detecting or compensating for a specific process fluctuation, and that with their help it is not possible to clearly differentiate between different process fluctuations. A pure combination of the different approaches would be technically very complicated.
    Object of the present invention is to avoid the disadvantages described above and to provide a comparison with the prior art improved and simplified method for quantification of process fluctuations in an injection process of an injection molding machine and such an injection molding machine. Such a quantification of process fluctuations is a prerequisite for a subsequent compensation in case of need.
    This object is achieved by a method according to claim 1 and an injection molding machine according to claim 21. Advantageous embodiments are defined in the dependent claims.
    As an alternative to using the positions of the injection device, the at least one variable characteristic of the injection process can also be measured at a plurality of points in time of the injection process and compared with a corresponding reference function. Quantities characteristic of the injection process may include the injection pressure, the melt pressure, the in-mold pressure, the mold internal temperature, the injection speed, the drive torque, and / or a quantity derived therefrom, e.g. the injection work, his. For measuring these characteristic variables, the injection molding machine has suitable measuring devices. The three mentioned pressure values are proportional to each other. They differ only in whether they are measured directly or indirectly and at what place. Thus, the injection pressure can be determined, for example, in an electrically driven injection molding machine indirectly from the mechanical deformation of an annular membrane and hydraulic injection units on the pressure in the hydraulic cylinder. In comparison, the melt pressure and the internal mold pressure are measured directly by means of suitable pressure sensors, namely in the case of the melt pressure in the screw antechamber (if the injection device is a screw) and in the case of in-mold pressure in the cavity or in the cavities. As an alternative to pressure, a measured variable calculated from the drive torque could also be used for electric drives. The internal mold temperature can be measured, for example, by means of a suitable temperature sensor, which is arranged in the region of the cavity surface.
    The positions of the displaceable injection device can be determined in electric drives from the angular position of the drive with the aid of the corresponding transmission ratio. In the case of hydraulic injection units, this can be done e.g. an external transducer can be used on the injection cylinder.
    The process variations which can be quantified by means of the method according to the invention are e.g. to the already mentioned in the introduction of the variations in the shot volume and / or fluctuations in the pressure requirement for filling at least one cavity of the injection molding machine during the Einspitzvorgangs. The process fluctuation in the form of fluctuations in the shot volume can be a shift of the measuring function with respect to the reference function in the direction of displacement of the • 9
    Injection device can be assigned. If we denote the direction of displacement of the injection device with x and the displacement of the measuring function with respect to the reference function in this direction with Δχ, then a mathematical transformation takes this shift into account: χ '= χ-Δχ. Δχ represents the freely selectable transformation parameter to which the process variation "fluctuations of the shot volume" is assigned.
    In order to quantify the process fluctuation in the form of fluctuations in the pressure requirement for filling the at least one cavity of the injection molding machine during the injection process, the injection pressure, the melt pressure and / or the internal mold pressure would be measured as the variable characteristic of the injection process. This process fluctuation can then be assigned to a scaling (with a factor kp) of the measuring function with respect to the reference function in the direction of the measured pressure variable (p) -as a transformation parameter. A corresponding mathematical transformation with the arbitrary transformation parameter kp would be: P-kp * P-
    In addition to these two process variations, the method according to the invention is also suitable, for example, for quantifying the following process fluctuations: Constant leakage per unit of travel traveled during processing without a backflow barrier (for example when processing PVC). This process variation can be assigned as a transformation parameter to a factor kL corresponding to a linear rescaling (the measurement function with respect to the reference function) according to the following mathematical transformation: x '= x-kL * (xo-x) Xo indicates a starting position. - Leakage of the return flow block proportional to the currently applied pressure (mathematical transformation:
    Xi '= Xj + kL * Ij = i ... i (Pj * At), where the index i passes through the individual measurement points and t denotes the time). Fluctuations in the initial pressure, e.g. with insufficient compression relief. This process variation can be assigned as a transformation parameter to a shift in the direction of pressure: ρ '= ρ + Δρ. - Variations in the melt temperature and / or the flow or the flow temperature in the case of tool cooling. Such process variations can be detected using the following mathematical transformation: T '(x> kT * T (x) + To, where scaling factor kr and temperature offset T0 are the corresponding arbitrary transformation parameters.
    A major advantage of the present invention is that the transformation parameters associated with the various process fluctuations or the corresponding transformations can be combined with one another as desired, so that several process variations can also be detected or quantified at the same time. For example, a mathematical transformation to quantify the process variability in the form of fluctuations in the shot volume and the process variation in the form of • * ···································································
    Variations in the pressure requirement for filling at least one cavity of the injection molding machine during the injection process as follows: p '(x') = kp * p (x-Ax).
    The reference function provided in the course of the method according to the invention can be determined, for example, by measuring at least one variable characteristic of the injection process during a reference cycle during at least one part of the injection process and by assigning the respective measured values to the respective positions Reference function is formed. In the case of a multiple tool with at least two cavities, it is also conceivable for at least one variable characteristic of the injection process to be measured for each of the cavities for a multiplicity of positions of the injector for each of the cavities during at least part of the injection process and to be assigned by assigning the respective measured values the respective positions a measuring function is formed. Subsequently, one of these measuring functions of one of the cavities could then be defined as a reference function, or a function averaged over at least two measuring functions of two cavities could be provided as a reference function.
    Advantageously, the mentioned determination of the at least one arbitrary transformation parameter takes place by means of a regression method. As an example, the linear regression with the method of least squares is sketched here:
    Given are a reference function fR consisting of value pairs a measurement function fM consisting of value pairs {xMJ, pMU), a transformation Uk, which maps the value pairs of the measurement function fM in value pairs {xBJ, pBti) of the image function fB. In the example under consideration, the transformation Uk {with the transformation parameters kp and p ()) is defined as:
    XB.i ~ XM, i PB.i = kpPM, i + P0 ut
    This transformation leaves the x-values unchanged, but includes a rescaling of the p-values by the factor kp and additionally a constant
    Shift by a print offset pa.
    The error ε (be defined as the difference between the pressure values of the reference function and the pressure values of the image function:
    ε, = Pm - PBJ
    We are looking for the parameter pairing kp, p0 which minimizes the sum of squares of the errors ^ £ · .2. i
    The above transformation can be made using the following notation
    ix) λΒ, 1 ix) λΜ, 1 'Pb.i' r Pu. 1 Γ XB, 2 XM. 2 p. i Pu. 2 1 II »XB, 3 'XM ~ XM, 3 * Pb ~ Pb.3, x = Pm. 3 1 XB.N; yXM.N, PB.S j vPm.n represent K (k. Po in vector notation as follows:
    Uk:
    XB = XM
    Pb = XP
    With the error in vector friction ε = ρκ-ρ "= ρκ-Χβ we have:
    The solution of the problem under the boundary condition ε2 min! is in matrix notation: ß =
    T Pr
    The sought transformation parameters p0 and p0 can therefore be calculated directly by simple matrix operations from the pM <t and pR i.
    According to a further exemplary embodiment of the invention, it can preferably be provided that at least part of the pairs of points from which the measurement function was formed is included with a different weighting in the determination of the at least one arbitrary transformation parameter.
    It is also proposed that the determination of the at least one arbitrary transformation parameter takes place during the injection process in which the measurement function was formed or following a first injection molding cycle. In the latter case it can be provided that the determination of the at least one arbitrary transformation parameter takes place either between the first and a second, subsequent injection molding cycle or during a second, subsequent injection molding cycle.
    As mentioned at the outset, the quantification of process fluctuations in an injection process of an injection molding machine is the prerequisite for the fact that the process fluctuation quantified using the at least one transformation parameter can be compensated by at least one corresponding corrective measure. Such a compensation should be provided in a preferred embodiment of the method according to the invention. If the determination of the at least one transformation parameter takes place during the injection process, in which the • · · * · · · · * · · «*. € Γ
    Measuring function was formed, so the compensation of the quantified using this at least one transformation parameter process fluctuation by the at least one corresponding corrective measure still in the injection molding of the injection process in which the measurement function was formed, take place. In some cases, however, it may also be advantageous for the compensation of the process fluctuation quantified using the at least one transformation parameter to be compensated by the at least one corresponding corrective measure via at least one injection molding cycle subsequent to the injection molding cycle in which the process fluctuation has been quantified.
    By way of example, the following corrective measures are mentioned: In the case of a process fluctuation in the form of fluctuations in the
    Shot volume can be possible corrective measures that o the switching point is moved, o the remaining injection profile is moved, o the velocity profile is corrected during injection and / or o the holding pressure time is changed so that the end position of the injector shifts by Δχ. - In the case of a process fluctuation in the form of fluctuations of the
    Pressure requirement for filling at least one cavity of the injection molding machine during the injection process, there are possible corrective measures to change o the switching pressure, o the holding pressure and / or o the Nachdruckprofil. - If the process fluctuation is a fluctuation of the melt temperature or fluctuations of the flow or the flow temperature in the case of tool cooling, a possible corrective action may be the cylinder temperature, the hot runner temperature and / or the tool temperature (via the flow rate or flow temperature) to change, so that the mold internal temperature course remains unchanged.
    According to a further aspect of the invention, protection is also desired for an injection molding machine with an injection device displaceable over a plurality of positions, in particular a screw, a measuring device for measuring the positions of the injection device, at least one measuring device for measuring at least one variable characteristic for the injection process of the injection molding machine, at least one cavity and a control and / or regulating device for carrying out the method according to the invention.
    Further details and advantages of the present invention will be explained in more detail below with reference to the description of the figures with reference to the exemplary embodiments illustrated in the drawings. Show in it
    Fig. 1 Fig. 2
    Fig. 3 Fig. 4a and 4b
    Fig. 5a and 5b
    6a and 6b show a diagrammatically illustrated overall perspective view of an injection molding machine which, for carrying out the method according to the invention, shows essential parts of an injection device of an injection molding machine in a schematically illustrated horizontal section, a diagrammatically illustrated diagram for illustrating the method according to the invention,
    Example curves for the course of the injection pressure as a function of the position of the injection device in the event of a process fluctuation in the form of fluctuations of the shot volume,
    Example curves for the course of the melt pressure as a function of the position of the injection device in the event of a process fluctuation in the form of fluctuations of the shot volume,
    Example curves for the course of the internal mold pressure as a function of the position of the injection device in the event of a process fluctuation in the form of fluctuations in the shot volume,
    Fig. 7a and 7b example curves for the course of the injection pressure at
    The presence of a process fluctuation in the form of fluctuations in the shot volume and a process fluctuation in the form of fluctuations in the pressure requirement for filling at least one cavity of the injection molding machine during the injection process,
    8a and 8b example curves in the case of a fluctuation of
    Mold interior temperature and
    9a and 9b example curves for the course of the injection pressure in the different cavities of a multiple tool.
    FIG. 1 schematically shows an overall perspective view of an injection molding machine 1 (known per se), which is relevant in connection with the following invention. It comprises a closing unit on the left and an injection unit 3 on the right.
    In FIG. 2, the parts of the injection device 3 of an injection molding machine that are relevant for understanding the invention are shown in greater detail. The central component of this injection device 3 is a plasticizing screw 2 mounted rotatably and displaceably in a plasticizing cylinder 4 as an injection device. The displaceability of the screw 2 in the longitudinal direction and the rotatability of the screw 2 about its longitudinal axis are indicated by the two arrows. The screw 2 has - seen in the drawing on the left side - a tip 5 with a locking ring 6, which is slidably mounted and is part of a return flow block.
    An injection molding cycle basically consists of two parts - the dosing process and the injection process. During the metering process, plastic granules are filled into the funnel 7 and reach the area of the rotating plasticizing screw 2. The rotational movement of the screw 2 causes the plastic granulate to move to the left in the direction of the screw antechamber 8, and at the same time by the shearing heat which occurs in some cases additionally plasticized via the heating of the plasticizing 4 heat supplied.
    The plastic melt flows further sequence during the dosing on the open backflow valve in the screw antechamber 8, accumulates there and thereby pushes the plasticizing screw 2 to the right.
    When enough plastic melt has accumulated in the screw antechamber 8, the backflow lock is closed and injection can begin. For this purpose, the existing in some cases closing nozzle 9 is opened and simultaneously moved the entire screw 2 to the left. As a result, the plastic melt from the screw antechamber 8 through the so-called hot runner in the cavity 13, which is located between the two mold halves 11 of a tool 10, pressed. By the reference numeral 12, the mold parting plane of the two mold halves 11 is designated.
    In the embodiments of the injector shown in FIG. 2, two servomotors are provided for the technical realization of the longitudinal movement or the rotational movement of the plasticizing, wherein the servo motor 20, the plasticizing screw (via spindles) moves in the longitudinal direction and the servomotor 21, the rotational movement of the plasticizing over the Drive pulley 22 drives. On the structural details of these drives would not be discussed at this point, since they belong to the prior art. It should be noted that the plasticizing screw 2 is displaced in the longitudinal direction relative to a fixed support plate 24 which is connected to the plasticizing cylinder 4 and the hopper 7.
    As already stated, different process fluctuations can now occur during the injection process of the plastic melt into the cavity 13, which negatively influence the molding quality. These include, in particular, fluctuations in the shot volume and / or fluctuations in the pressure requirement for filling the cavity 13. A method step according to the invention for quantifying these process fluctuations is characterized by the fact that variables characteristic of a multiplicity of positions x of the screw 2 during the injection process are measured for the injection process Assignment of the respective measured values to the respective positions x measuring functions fM are formed. These characteristic quantities include the injection pressure pe, the melt pressure ps, the in-mold pressure p, and / or the mold internal temperature Tj. *** " To measure these variables, appropriate pressure or temperature sensors 14, 15, 16 and 17 are provided. In the embodiment shown in FIG. 2, the sensor 15 is fixedly connected to a bracket 23. It measures the distance to the drive pulley 22 and thus indirectly the injection pressure pe. The signals of the measuring sensors 14, 15, 16 and 17 are forwarded to a control and regulating device 18 as well as the measured values from which the positions x of the worm 2 are determined. The further method steps for quantifying the process fluctuations (and, based thereon, the control of the corresponding corrective measures, for example via the drive 19 of the longitudinal drive) then take place in the control and regulation device 18. The method steps for quantifying the process fluctuations are explained in more detail below with reference to FIG. 3:
    FIG. 3 shows by way of example a measurement function fM, which was formed by assigning the respective measured values of the characteristic variable pe, ps, Pi or T to the respective positions x of the screw. This measurement function fM is subsequently used as the output function fA for a provided mathematical transformation Uk, which transforms this output function fA into an image function fR as a function of the arbitrary transformation parameter Uj. In this case, the arbitrary transformation parameters Uj are determined such that the resulting image function fe with respect to a predetermined error measure best matches a reference function fR, wherein the reference function fR for each of the positions x of the screw in which the characteristic size pe, ps, Pi or T is measured, has a predetermined value. In the preferred embodiment, this reference function fR has been included in a reference cycle during the injection process. Finally, the process fluctuations P associated with these transformation parameters υ are quantified with respect to the reference function fR using the transformation parameters Uj.
    Concrete examples of this method are explained in more detail below with reference to FIGS. 4a to 9b. FIG. 4a shows a measurement curve for the injection pressure pe in
    Relevance of the screw position x (open triangles). In addition, a reference curve is shown (open circles). The measuring function is now used as the output function for the mathematical transformation p '(x') = kp * p (x-Δχ) and the freely selectable transformation parameters kp and Δχ are determined in such a way that the image function of the measuring function best matches the reference function (s. Fig. 4b). This gives kp a value of 1 and Δχ a value of 0.12. This means that in this case there must have been a process fluctuation in the form of a fluctuation of the shot volume. This information or the value for this process fluctuation will now be used subsequently to compensate for this process fluctuation by a corresponding corrective action. Possible corrective measures have already been mentioned above.
    In the pair of figures 5a / 5b, 6a / 6b and 7a / 7b further such examples are shown, wherein in Figs. 5a / 5b as a characteristic size of the melt pressure ps, in Figs. 6a / 6b as a characteristic size of the internal mold pressure p, and was measured in FIGS. 7a / 7b as a characteristic size of the injection pressure pe. In FIGS. 5a / 5b and 6a / 6b, fluctuation of the shot volume was again quantified as a process fluctuation, whereas in FIGS. 7a / 7b there was a superposition of two process fluctuations, namely a fluctuation of the final voices and a fluctuation of the pressure requirement for filling the cavity.
    In the case of the pair of figures 8a / 8b, the characteristic internal temperature T was measured as a function of the screw position x and the mathematical transformation T '(x') = kT * T (x) + T0 was applied to the measuring function.
    The pair of figures 9a / 9b shows an example of the curves of the internal mold pressure p, as a function of the position x of the screw in the individual cavities of a 4-cavity mold. The pj (x) processes differ significantly from each other. The curve pi (x) was defined as the reference curve. The pressure profiles of the remaining cavities were adapted to this reference curve with the aid of the transformation p '(x') = kp * p (x-Ax) and in this way identify the parameters kp and Δχ for the individual cavities. In this case, an x-displacement Δχ corresponds to a filling of the individual cavities at different times, wherein different values of the parameter kp correspond to differences in the pressure requirement between the individual cavities. These may be caused, for example, by differences in the melt temperature or in the mold temperature. These differences can subsequently be compensated, for example in the case of a hot runner mold, by the following measures: delayed opening of closing nozzles of the individual hot runners, variation of the temperatures of the hot runner nozzles and / or variation of flow temperature or flow of individual mold temperature control circuits.
    Innsbruck, 17 October 2011
    权利要求:
    Claims (21)
    [1]
    1. A method for quantifying process fluctuations (Pj) in an injection process of an injection molding machine (1) which has an injection device (2), in particular a screw (2), displaceable over a multiplicity of positions (x), characterized in that - at least one mathematical transformation (Uk), which transforms an output function (fA) into an image function (fe) as a function of at least one arbitrary transformation parameter (Uj), is provided to the at least one transformation parameter (Uj) Process variation (Pj) is assigned, - during at least part of the injection process at least one characteristic of the injection process variable (pe, ps, Pi, Ti) for a plurality of positions (x) of the injection device (2) measured and by assignment of the respective measured values to the respective positions a measuring function (ϊμ) is formed, - a reference function ( fR) which has a predetermined value for each of the positions (x) of the injector (2) for which the characteristic quantity (pe, ps, Pi, T) has been measured, - the measuring function (fM) as output function (fA) for the at least one provided mathematical transformation (Uk) is used, wherein the at least one arbitrary transformation parameter (uj) of this at least one mathematical transformation (Uk) is determined so that the resulting image function (fB) with respect to a predetermined Error measure as best as possible with the reference function (fR) matches, and the this process transformation parameter (Uj) associated process fluctuation (Pj) is quantified with respect to the reference function (fR) using the at least one transformation parameter (uj). »* · · ··· *» * »» ··· · · · · ·
    [2]
    2. The method according to claim 1, characterized in that an injection pressure (pe), a melt pressure (ps) and / or an internal mold pressure (pj) is measured as characteristic of the injection process variable.
    [3]
    3. The method according to claim 1 or 2, characterized in that a characteristic internal temperature (Tj) is measured as characteristic of the injection process variable.
    [4]
    4. The method according to any one of claims 1 to 3, characterized in that an injection speed, a drive torque and / or an injection work is measured as characteristic of the injection process variable.
    [5]
    5. The method according to any one of claims 1 to 4, characterized in that it is one of the process fluctuations to fluctuations of the shot volume.
    [6]
    6. The method according to claim 5, characterized in that the process fluctuation in the form of fluctuations of the shot volume of a displacement (Δχ) of the measuring function (fM) with respect to the reference function (fR) in the direction (x) of the injection device (2) as a transformation parameter ( Uj) is assigned.
    [7]
    7. The method according to any one of claims 1 to 6, characterized in that it is one of the process fluctuations to fluctuations in the pressure requirement for filling at least one cavity (13) of the injection molding machine (1) during the injection process.
    [8]
    8. The method according to claim 7, wherein as characteristic of the injection process size of the injection pressure (pe), the Schmeizedruck (ps) and / or the internal mold pressure (p,) is measured, characterized in that the process fluctuation in the form of variations in the pressure requirement Filling of at least one cavity (13) of the injection molding machine (1) during the process of the injection molding machine (1) during the process of the injection molding machine (3) · * * Of the injection process is associated with a scaling (kp) of the measuring function (fM) with respect to the reference function (fR) in the direction of the measured injection pressure (pe), melt pressure (ps) or in-mold pressure (p *) as the transformation parameter (uj) ,
    [9]
    Method according to one of claims 1 to 8, characterized in that in a reference cycle during at least a part of the injection process at least one characteristic of the injection process size (pe, ps. Pi. "Π) for a plurality of positions (x) the injection device (2) is measured and the reference function (fR) is formed by assigning the respective measured values to the respective positions.
    [10]
    10. The method according to any one of claims 1 to 9, characterized in that in a multiple tool having at least two cavities (13) for each of the cavities (13) during at least part of the injection process at least one for the injection process in each of the cavities (13). characteristic variable (P ,, T) is measured for a plurality of positions (x) of the injection device (2) and a measurement function (fM) is formed by assigning the respective measured values to the respective positions.
    [11]
    11. The method according to claim 10, characterized in that a measuring function (fM) of a cavity (13) is defined as a reference function (fR).
    [12]
    12. The method according to claim 10, characterized in that over at least two measuring functions (fw) of two cavities (13) averaged function is provided as a reference function (fR)
    [13]
    13. The method according to any one of claims 1 to 12, characterized in that the determination of the at least one arbitrary transformation parameter (Uj) by means of a regression method. 4
    [14]
    14. The method according to any one of claims 1 to 13, characterized in that at least a portion of the pairs of points from which the measurement function (fM) was formed, with a different weighting in the determination of the at least one arbitrary transformation parameter (uj) is included.
    [15]
    15. The method according to any one of claims 1 to 14, characterized in that the determination of the at least one arbitrary transformation parameter (uj) during the injection process in which the measurement function (fM) was formed takes place.
    [16]
    16. The method according to any one of claims 1 to 14, characterized in that the determination of the at least one arbitrary transformation parameter (Uj) is carried out subsequent to a first Spritzgießzykius.
    [17]
    17. The method according to claim 16, characterized in that the determination of the at least one arbitrary transformation parameter (uj) takes place between the first and a second, subsequent injection molding cycle or during a second, subsequent injection molding cycle.
    [18]
    18. Method according to one of claims 1 to 17, characterized in that the process fluctuation quantified using the at least one transformation parameter (uj) is compensated by at least one corresponding corrective measure.
    [19]
    19. The method according to claim 18, wherein the determination of the at least one transformation parameter (uj) takes place during the injection process in which the measurement function (fM) was formed, characterized in that the compensation is quantified using this at least one transformation parameter (Uj) Process variation by the at least one corresponding corrective action in the injection molding of the injection process, in which the measurement function (fM) was formed, takes place. * 3 * «
    [20]
    20. The method according to claim 18, characterized in that the compensation of the process fluctuation quantified using the at least one transformation parameter (Uj) by the at least one corresponding corrective action extends over at least one injection molding cycle subsequent to the injection molding cycle in which the process variation has been quantified.
    [21]
    21. Injection molding machine (1) having a plurality of positions (x) displaceable injection device (2), in particular screw (2), a measuring device for measuring the positions (x) of the injection device (2), at least one measuring device (17,14 , 15, 16) for measuring at least one of the injection process of the injection molding machine (1) characteristic size (pe, ps, Pi, T), at least one cavity (13) and a control and / or regulating device (18) for performing the method according to any one of claims 1 to 20. Innsbruck, 17 October 2011
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    同族专利:
    公开号 | 公开日
    CN103112138B|2015-04-08|
    AT511391B1|2013-02-15|
    EP2583811B1|2015-03-11|
    CN103112138A|2013-05-22|
    EP2583811A1|2013-04-24|
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    法律状态:
    优先权:
    申请号 | 申请日 | 专利标题
    AT15182011A|AT511391B1|2011-10-18|2011-10-18|METHOD FOR QUANTIFYING PROCESS FLUCTUATIONS IN AN INJECTION OPERATION OF AN INJECTION MOLDING MACHINE|AT15182011A| AT511391B1|2011-10-18|2011-10-18|METHOD FOR QUANTIFYING PROCESS FLUCTUATIONS IN AN INJECTION OPERATION OF AN INJECTION MOLDING MACHINE|
    EP12006404.3A| EP2583811B1|2011-10-18|2012-09-12|Method for quantifying process fluctuations in the injection process of a injection moulding machine|
    CN201210396257.4A| CN103112138B|2011-10-18|2012-10-18|Method for quantifying process fluctuations in the injection process of an injection moulding machine and the injection moulding machine|
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