WO2023022082A1 - 射出成形機の成形支援装置 - Google Patents
射出成形機の成形支援装置 Download PDFInfo
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- WO2023022082A1 WO2023022082A1 PCT/JP2022/030523 JP2022030523W WO2023022082A1 WO 2023022082 A1 WO2023022082 A1 WO 2023022082A1 JP 2022030523 W JP2022030523 W JP 2022030523W WO 2023022082 A1 WO2023022082 A1 WO 2023022082A1
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Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B29—WORKING OF PLASTICS; WORKING OF SUBSTANCES IN A PLASTIC STATE IN GENERAL
- B29C—SHAPING OR JOINING OF PLASTICS; SHAPING OF MATERIAL IN A PLASTIC STATE, NOT OTHERWISE PROVIDED FOR; AFTER-TREATMENT OF THE SHAPED PRODUCTS, e.g. REPAIRING
- B29C45/00—Injection moulding, i.e. forcing the required volume of moulding material through a nozzle into a closed mould; Apparatus therefor
- B29C45/17—Component parts, details or accessories; Auxiliary operations
- B29C45/76—Measuring, controlling or regulating
Definitions
- the present invention relates to a molding support device for an injection molding machine that is suitable for use in providing molding support for an injection molding machine that injects and fills a mold with a plasticized molten resin using a screw.
- Injection molding machines generally carry out molding by injecting and filling plasticized molten resin into a mold using a screw.
- the plasticization is insufficient, the solid fraction (unmelted polymer fraction) will increase due to insufficient plasticization of the molten resin, leading to problems such as a decrease in moldability and further deterioration in molding quality.
- the resin decomposition rate carbonization rate
- problems such as deterioration of the molten resin and generation of unnecessary gas. For this reason, techniques have been proposed for grasping the state of the molten resin in the heating cylinder and performing necessary countermeasures.
- a plasticization simulation device disclosed in Patent Document 1 and a molding support device for an injection molding machine disclosed in Patent Document 2 are known.
- the plasticization simulation device disclosed in Patent Document 1 uses the resin physical properties of the material used in the screw-type plasticization device, the operating conditions of the plasticization device, and the configuration data of the plasticization device, and calculates the screw characteristic formula
- a plasticization simulation apparatus configured to perform a physical quantity calculation process for calculating at least one physical quantity out of a solid fraction, temperature, pressure, and plasticizing capacity using a mass conservation equation and an energy conservation equation.
- the physical quantity in the rotating state of the screw is calculated by the physical quantity calculation process, and the calculated physical quantity is used to calculate the physical quantity in the stopped state of the screw by using the screw characteristic formula, the mass conservation formula, and the energy conservation formula. It is the one that provided the part.
- the molding support device disclosed in Patent Document 2 is intended to improve the yield rate and molding quality of molded products even by novice operators.
- a basic data input unit for inputting basic data including screw data related to the shape of the screw, and a solid phase ratio calculation formula data for calculating the solid phase ratio of the molten resin in the heating cylinder based on this basic data.
- the object of the present invention is to provide a molding support device for an injection molding machine that solves the problems existing in the background art.
- the present invention provides a resin data setting unit Fmr for setting resin data Dr, a molding machine data setting unit Fmm for setting molding machine data Dm, and a molding data setting unit related to molding conditions.
- a molding condition data setting unit Fms for setting condition data Ds an arithmetic processing function unit Fc for estimating the molten state of the plasticized resin based on the resin data Dr, the molding machine data Dm and the molding condition data Ds, and the arithmetic processing
- the molding support device 1 for the injection molding machine which includes the output processing function unit Fo for visually displaying the molten state estimated by the function unit Fc on the display 5, the resin data Dr set in the resin data setting unit Fmr.
- a resin item selection unit 6 for selecting an item Drc related to the type of resin and an item Drm related to a predetermined physical property of the resin, and a plurality of different resin temperatures Et related to the selected resin and corresponding to each resin temperature Et.
- a physical property value input unit 7 for inputting a physical property value Em corresponding to an arbitrary resin temperature Et; a physical property value conversion unit 8 for obtaining a physical property value Em corresponding to an arbitrary resin temperature Et; It is characterized by comprising a data conversion processing function unit Fe for giving the physical property value Em obtained by the physical property value conversion unit 8 corresponding to Et to the arithmetic processing function unit Fc.
- the data conversion processing function unit Fe can be provided with a function of displaying the detailed data input screen Vie having the resin item selection unit 6 and the physical property value input unit 7 on the display 5.
- the physical property value conversion unit 8 may have a function of converting using a functional expression Fx obtained from physical property values corresponding to a plurality of different resin temperatures or a modified functional expression Fxe. It may be a function of converting using a data table obtained from corresponding physical property values or a modified data table. Note that when the data conversion processing function unit Fe is not used in the arithmetic processing function unit Fc, a preset standard value can be used as the physical property value.
- the solid phase ratio (Xcs) of the molten resin in the heating cylinder 4 is calculated as the molten state of the plasticized resin based on the resin data Dr, the molding machine data Dm, and the molding condition data Ds.
- a function of estimating can be included, and a function of estimating the resin decomposition rate (Xrs) of the screw surface 3f during molding based on the resin data Dr, the molding machine data Dm, and the molding condition data Ds can be included. .
- a resin item selection unit 6 that selects an item Drc related to the type of resin and an item Drm related to a predetermined physical property of the resin from the resin data Dr set in the resin data setting unit Fmr, and a physical property value input unit 7 for inputting a plurality of different resin temperatures Et and physical property values Em corresponding to each resin temperature Et; a physical property value conversion unit 8 for obtaining a physical property value Em corresponding to an arbitrary resin temperature Et; a data conversion processing function unit Fe that gives the resin temperature Et at the time of estimation of the state and the physical property value Em obtained by the physical property value conversion unit 8 corresponding to the resin temperature Et to the arithmetic processing function unit Fc, When estimating the molten state of the plasticized resin, accurate physical property values corresponding to the resin temperature can be used. This eliminates the need for manual corrections and corrections, etc., even for inexperienced novice operators. High molding quality can be secured.
- the data conversion processing function part Fe is provided with a function to display the detailed data input screen Vie having the resin item selection part 6 and the physical property value input part 7 on the display 5, the operator (user) can Since the data can be easily input by , the detailed information owned by the user can be utilized for improving the quality of molding.
- the physical property value conversion unit 8 is provided with a function of converting using a functional expression Fx obtained from physical property values corresponding to a plurality of different resin temperatures or a modified functional expression Fxe, or a plurality of different If a conversion function using a data table obtained from the physical property values corresponding to the resin temperature or a corrected data table is provided, the calculation function of the molding machine controller installed in the molding machine can be used, so the function expression Fx (Fxe ), data table, etc., can be easily implemented.
- the data conversion processing function unit Fe when the data conversion processing function unit Fe is not used in the arithmetic processing function unit Fc, if a preset standard value is used as the physical property value, it can be used according to the presence or absence of detailed information related to the resin. Since it can be performed as required, the molding process can be reliably performed even when there is no detailed information regarding the resin.
- the solid phase of the molten resin in the heating cylinder 4 is stored in the arithmetic processing function unit Fc as the molten state of the plasticized resin based on the resin data Dr, the molding machine data Dm, and the molding condition data Ds. If the function of estimating the rate (Xcs) is included, it can be applied particularly to the estimated solid phase rate Xcs of the molten resin in the heating cylinder 4, so that an accurate and appropriate estimated solid phase rate Xcs can be obtained. .
- the resin decomposition rate of the screw surface 3f during molding is stored in the arithmetic processing function unit Fc as the molten state of the plasticized resin based on the resin data Dr, the molding machine data Dm, and the molding condition data Ds. If the function of estimating (Xrs) is included, it can be applied particularly to the estimated resin decomposition rate Xrs of the screw surface 3f during molding, so that the estimated resin decomposition rate Xrs can be obtained accurately and appropriately.
- a detailed data input screen diagram of a display provided in a molding support device A block system diagram of an injection molding machine equipped with the same molding support device, Basic data input screen diagram of the display provided in the molding support device, Explanatory diagram of the functional expression creation function provided in the molding support device, Explanatory drawing when correcting the functional expression creation function provided in the molding support device, A flow chart for explaining the processing procedure of the data change processing function of the molding support device, A flow chart for explaining the processing procedure of the function expression creation processing in the same data change processing function, A flow chart for explaining a processing procedure according to an example of a molding assistance method using the same molding assistance device, An output screen diagram of a display based on an example of a molding assistance method using the same molding assistance device, A graph for explaining an output screen used as an example of a molding assistance method using the same molding assistance device,
- FIG. 2 shows an injection molding machine M, in particular, an injection device Mi without a mold clamping device.
- 4 is a heating cylinder, and a nozzle 4n is attached and fixed to the front end of the heating cylinder 4 via a head part 4h, and a hopper 13 is provided at the upper rear end of the heating cylinder 4.
- the nozzle 4n has the function of injecting the molten resin inside the heating cylinder 4 into the mold 2 indicated by the phantom line, and the hopper 13 has the function of supplying the resin material (resin pellets) to the inside of the heating cylinder 4. have.
- the screw 3 is loaded inside the heating cylinder 4 so as to be rotatable and advance/retreat.
- a helical flight portion 3mp is formed on the surface of the screw 3, and the screw surface 3f is coated with a predetermined surface material (metal) in consideration of durability.
- This screw 3 has a metering zone Zm, a compression zone Zc, and a feed zone Zf from the front side to the rear side.
- the rear end portion of the screw 3 is connected to the screw drive portion 14 .
- the screw drive unit 14 includes a screw rotating mechanism 14r that rotates the screw 3 and a screw forward/backward mechanism 14m that moves the screw 3 forward and backward.
- the driving system of the screw rotation mechanism 14r and the screw advancing/retreating mechanism 14m may be a hydraulic system using a hydraulic circuit or an electric system using an electric motor, and the driving system is not limited.
- the heating cylinder 4 has a heating cylinder front part 4f, a heating cylinder middle part 4m, and a heating cylinder rear part 4r from the front side to the rear side.
- a central heating section 11m and a rear heating section 11r are provided.
- a head heating portion 11h is attached to the outer peripheral surface of the head portion 4h
- a nozzle heating portion 11n is attached to the outer peripheral surface of the nozzle 4n.
- Each of these heating portions 11f, 11m, 11r, 11h, and 11n can be configured by a band heater or the like.
- the molding machine controller 21 is a molding machine controller that controls the entire injection molding machine M.
- the molding machine controller 21 includes a controller main body 22 having a computer function and incorporating hardware such as a CPU and an attached internal memory 21m.
- a display 5 attached to the controller main body 22 is connected to the connection port of the controller main body 22, and a driver 24 for driving (operating) various actuators is connected.
- the display 5 is capable of displaying necessary information, and is provided with a touch panel 5t. Using this touch panel 5t, various operations such as input, setting and selection can be performed.
- the driver 24 is connected to the screw rotation mechanism 14r and the screw advancing/retracting mechanism 14m, and also to the heating units 11f, 11m, 11r, 11h, and 11n.
- the controller body 22 can drive and control the screw rotation mechanism 14r and the screw advancing/retreating mechanism 14m via the driver 24, and can also control the energization of the heating portions 11f, 11m, 11r, 11h, and 11n.
- the molding machine controller 21 includes an HMI (Human Machine Interface) control system and a PLC (Programmable Logic Controller) control system, and the internal memory 21m stores the PLC program and the HMI program.
- the PLC program is software for realizing sequence operations of various processes in the injection molding machine M, monitoring of the injection molding machine M, etc.
- the HMI program is for setting and displaying operation parameters of the injection molding machine M, This is software for realizing the display of the operation monitoring data of the molding machine M, and the like.
- FIG. 1 the configuration of the molding support device 1 according to this embodiment that can be used in such an injection molding machine M will be described with reference to FIGS. 1 to 5.
- FIG. 1 the configuration of the molding support device 1 according to this embodiment that can be used in such an injection molding machine M will be described with reference to FIGS. 1 to 5.
- the molding support device 1 is configured using the controller main body 22 and the display 5 that constitute the molding machine controller 21 described above. Therefore, the internal memory 21m of the controller main body 22 stores a support program Ps by an application program that causes the forming support apparatus 1 to function.
- the molding support apparatus 1 has a basic data input screen 31 for inputting basic data shown in FIG. 3 (FIG. 2), and this basic data input screen 31 is displayed on the screen of the display 5 by starting the support program Ps. be done. Since the display 5 is provided with a touch panel 5t, various data can be input and selected using the touch panel 5t.
- the layout of the basic data input screen 31 shown as an example in FIG. 3 has a data input section Fi in the upper part.
- This data input unit Fi includes, as resin data Dr, a resin selection unit 31a for selecting the type of resin and inputting resin data, a fluidity input unit 31b for inputting the fluidity (MFR) of molten resin, and information on reinforcing fibers.
- a reinforcing fiber input unit 32 for inputting is provided.
- the input resin data Dr is set in the resin data setting section Fmr in the internal memory 21m.
- the reinforcing fiber input unit 32 includes a fiber type input unit 32a for inputting the type of reinforcing fiber, an addition amount input unit 32b, and a fiber length input unit 32c, thereby inputting reinforcing fiber data Drg.
- the reinforcing fiber data Drg includes the type of reinforcing fiber, the amount added to the resin, and the fiber length, it can be sufficiently covered as an element for visualizing the reinforcing fiber. It is possible to accurately grasp the change status (damage status, etc.) of the reinforcing fibers included.
- molding machine data Dm a screw selection section 33a for selecting the type of screw and a molding machine selection section 33b for selecting the type of molding machine are provided.
- the screw data Dms can be used to determine the screw outer diameter, screw flight width, friction coefficient between solid and screw, screw groove depth, screw width direction length, screw lead, flight coefficient, screw flight torsion angle, pitch number, etc.
- a plurality of various data related to the screw are selected, such as data related to dimensions and further data related to the type of material of the screw surface 3f.
- the screw data Dms includes data relating to the type of material of the screw surface 3f
- the catalyst effect of the metal material of the screw surface 3f on the molten resin and the deterioration factor due to the ease of adhesion can be calculated from the estimated resin decomposition rate Xrs. Since it can be reflected in the calculation, a more accurate (accurate) estimated resin decomposition rate Xrs can be obtained.
- the input molding machine data Dm is set in the molding machine data setting section Fmm in the internal memory 21m.
- the type of resin can be selected by the resin selection section 31a.
- the physical property values unique to the resin ie, the physical property values such as the specific heat and thermal conductivity corresponding to each resin, are set to standard values based on catalog values published by manufacturers.
- a detailed resin information input key Ki is provided on the basic data input screen 31 shown in FIG.
- a detailed resin information input key Ki is provided on the basic data input screen 31 shown in FIG.
- the detailed data input screen Vie shown in FIG. 1 has a resin item selection section 6 in the upper part of the screen.
- the resin item selection section 6 selects items related to the type of resin from the resin data Dr set in the resin data setting section Fmr. Drc can be selected, and an item Drm related to predetermined physical properties of the selected resin can be selected.
- a physical property value input section 7 is provided below the resin item selection section 6, which is the lower part of the screen, and through this physical property value input section 7, it is possible to input a plurality of different resin temperatures Et... related to the selected resin.
- the data conversion processing function unit Fe is provided, and the data conversion processing function unit Fe is provided with a function of displaying the detailed data input screen Vie having the resin item selection unit 6 and the physical property value input unit 7 on the display 5. If so, an operator (user) can easily input data, so detailed information possessed by the user can be utilized to improve the quality of molding.
- the molding machine controller 21 has a physical property value conversion section 8 that constitutes a part of the data conversion processing function section Fe. It is possible to obtain the physical property value Em to be used. That is, the physical property value conversion unit 8 can obtain the physical property value Em corresponding to an arbitrary resin temperature Et by using the functional expression Fx obtained from the physical property values corresponding to a plurality of resin temperatures or the modified functional expression Fxe. made it possible. As a result, the physical property value set by the standard value is converted into an accurate physical property value Em corresponding to the resin temperature Et based on the function Fx (Fxe), and the converted physical property value Em represents the molten state. Since it is given to the arithmetic processing function unit Fc that performs the estimation process, the accurate physical property value Em is used for the estimation process by the arithmetic processing function unit Fc.
- the operator first executes (starts) the support program Pc (step S1). As a result, the basic data input screen 31 shown in FIG. 3 is displayed on the display 5 (step S2).
- the operator touches (turns on) the detailed resin information input key Ki (step S3).
- the detailed data input screen Vie shown in FIG. 1 is displayed on the display 5 (step S4).
- the item Drc related to the type of resin can include various other resins and grades corresponding to these resins.
- an item Drm related to a predetermined physical property of the selected resin is selected (step S6).
- the items Drm related to the predetermined physical properties include “specific heat”, “thermal conductivity”, “differential thermal/thermogravimetry (TG/DTA)", “differential scanning calorimetry (DSC)", “decomposition rate ", "water absorption”, “specific gravity”, etc. can be included.
- the specific physical property value input section 7 shown in FIG. 1 is displayed, and a more detailed file name is selected from the file selection section 42 .
- No. 1 "PP specific heat (CSV file)" is selected.
- the type of physical properties corresponding to each file can be selected.
- the data input column 44 is displayed, so that data relating to a plurality of different resin temperatures Et relating to the selected resin and physical property values Em corresponding to each resin temperature Et are entered (step S7). .
- the CSV file since the CSV file was selected for data input, it is possible to input data by transferring it from data saved in a USB memory, for example. Specifically, if the input key 43 is touched after selecting the above-described "PP specific heat (CSV file)", a plurality of different resin temperatures Et and corresponding resin temperatures Et are displayed in the data input field 44. A physical property value Em is input.
- various input methods such as manual input by an operator, transmission by wireless communication means from the outside, and transfer from various media other than USB memory can be used. Then, when all the data have been input (step S8), a functional expression creating process for creating a functional expression Fx is performed (step S9).
- FIG. 7 shows a flow chart of a specific processing procedure (subroutine) of the function expression creation process (step SG) shown in FIG.
- the precision selection section 45 provided at the bottom of the detailed data input screen Vie is used to select the precision for conversion into a functional expression (step S91).
- the exemplified accuracy selection unit 45 indicates a case where ranks are divided into “A”, “B”, “C”, . . . in descending order of accuracy. It may be ranked by a function formula such as "formula”!sixth order formula".
- the accuracy rank is selected by the accuracy selection unit 45, the graph creation key 46 is touched (ON) (step S92).
- the graph shown in FIG. 4 is automatically created. 4 and 5 show graphs for explaining the function of creating a functional expression, and FIG.
- Example FIG. 4 is a graph of resin temperature [° C.] vs. specific heat [J/kg ⁇ K] characteristic graph that is directly converted into a functional expression Fx.
- Example FIG. 5 shows an example of converting FIG. 4 into a functional expression Fxe by modifying it.
- FIG. 4 shows a case where the highest rank “A” rank is selected, and the physical property value conversion unit 8 shown in FIG. A combined functional expression Fx is created, and this functional expression Fx is displayed in a graph as shown in FIG. 4 (step S94). Then, the operator confirms the graph display shown in FIG. 4 (step S95). As a result, if the operator judges that the displayed function Fx is good, he or she touches a rank registration key (not shown) to perform rank registration (temporary registration) (steps S96, S98, S99).
- FIG. 5 which is shown as an example, is modified to a functional expression Fxe of only a more simplified linear function “nx+ka”.
- Such a functional expression Fx may be set as a single rank, or may be set as a plurality of different ranks according to the grade of the molded product, etc., and may be selected and used as necessary. . Therefore, the ranks of the functional expressions Fx (Fxe) . (Steps S100, S91, . . . ).
- Figures 4 and 5 illustrate the simplest case as an example, and do not match Figure 1. Actually, not only a linear function but also a quadratic function, an n-th order function, etc. are combined, so that different ranks can be selected and used depending on the operator. 4 and 5 show the case of using the functional expression Fx or the modified functional expression Fxe, but from a data table that can be similarly converted, that is, from the physical property values corresponding to a plurality of different resin temperatures The resulting data table or modified data table may be used for conversion.
- the physical property value conversion unit 8 is provided with a function of converting using a functional expression Fx obtained from physical property values corresponding to a plurality of different resin temperatures or a modified functional expression Fxe, or a function corresponding to a plurality of different resin temperatures is provided. If a conversion function is provided using a data table obtained from the physical property value obtained from the physical property value or a corrected data table, the calculation function of the molding machine controller installed in the molding machine can be used, so the function expression Fx (Fxe) and the data table etc., can be easily implemented.
- a change registration key (not shown) is touched to perform change registration processing (steps S10 and S11).
- the change registration process is not performed, that is, when the data conversion processing function unit Fe according to the present embodiment is not used, for example, when using the physical property value of "specific heat", it is registered as the standard value A single physical property value is used, but when change registration processing based on the data conversion processing function part Fe is performed, the resin temperature [° C.] at the time when the physical property value of "specific heat" is used is taken in, Since the correct "specific heat” corresponding to the resin temperature [°C] is calculated by the functional expression Fx (Fxe), the calculated accurate physical property value estimates the molten state of the plasticized resin (estimated solid phase rate Xcs, estimated resin decomposition rate Xrs, etc.).
- a preset standard value is used as the physical property value. That is, since the molding process can be performed flexibly according to the presence or absence of detailed information about the resin, the molding process can be reliably performed even when there is no detailed information about the resin.
- the molding support device 1 has, as a basic function, a function of estimating the molten state of the plasticized resin to support the setting of more desirable molding conditions.
- the internal memory 21m of the molding machine controller 21 is provided with a molding condition data setting section Fms for setting molding condition data Ds relating to molding conditions, and the display 5 has a setting screen 35 ( (see FIG. 2) is displayed.
- this setting screen 35 functions as a molding condition setting section Fmi, and includes, for example, screw rotation speed, metering time, back pressure, metering position, front temperature , middle part temperature, rear part temperature, cycle time, etc. are set. These settings can be made by inputting or selecting necessary numerical values via the touch panel 5t.
- the molding support device 1 is provided with an arithmetic expression data setting unit Fs stored in the internal memory 21m, and the solid fraction arithmetic expression data Dsc and the decomposition ratio arithmetic expression data Dsr are set in the arithmetic expression data setting unit Fs. do.
- the solid phase ratio calculation formula data Dsc is data related to the calculation formula for calculating the solid phase ratio Xc of the molten resin in the heating cylinder 4 based on the aforementioned input data Di and molding condition data Ds.
- the expression data Dsr is data relating to an arithmetic expression for calculating the resin decomposition rate Xr of the screw surface 3f during molding based on the aforementioned input data Di and molding condition data Ds.
- the input data Di used for the calculation processing of the solid phase calculation formula data Dsc can be used for the calculation of the decomposition rate calculation formula data Dsr.
- the estimated resin decomposition rate Xrs can be easily obtained because it can also be used for treatment.
- Cx is the width of the solid at the current position
- Cw is the pitch width minus the flight width
- Cx′ is the width of the solid before one pitch
- ka is the adjustment factor
- ⁇ i is the melt rate in injection
- ⁇ e is the melt rate in extrusion
- Tr is the metering time
- Tc is the cycle time.
- the decomposition rate calculation formula for obtaining the resin decomposition rate Xr which is the basis of the decomposition rate calculation formula data Dsr, already uses the decomposition rate calculation formula described in the republished patent publication WO2019-188998 proposed by the present applicant. can do. That is, [Formula 102] can be used.
- Resin decomposition rate Xr E ⁇ Wa ⁇ kb [Equation 102]
- E f (W, L, ⁇ , ⁇ , ⁇ ) Wa ⁇ f ( ⁇ m, ⁇ c, Qs)
- E is the shear heating value [MJ] calculated from Tadmor's model formula, and is the total shear heating value obtained by integrating the shear heating value from the complete melting position to the tip of the screw 3.
- Wa indicates the work of adhesion between the molten resin and the metal [MJ/m2], and kb indicates an adjustment coefficient considering the catalytic effect of the metal.
- W is the length obtained by subtracting the flight width from the pitch width
- L is the screw spiral length
- ⁇ is the shear stress
- ⁇ is the shear rate
- ⁇ is the dimensionless depth.
- ⁇ m is the work function of the base metal
- ⁇ c is the work function of the metal coated on the base metal
- Qs is the amount of oxygen adhering to the outermost metal.
- the oxygen content Qs can be measured by an X-ray analyzer (EDX device).
- the work of adhesion Wa indicates the easiness of adhesion between molten resin and metal.
- the decomposition rate calculation formula data Dsr for obtaining the resin decomposition rate Xr of the screw surface 3f during molding is set in the calculation formula data setting unit Fs based on the input data Di and the molding condition data Ds, the solid phase
- the estimated resin decomposition rate Xrs can be easily obtained, for example, the input data Di used for the calculation processing of the rate calculation formula data Dsc can also be used for the calculation processing of the decomposition rate calculation formula data Dsr.
- the molding support device 1 is provided with an arithmetic processing function unit Fc shown in FIG. Fc includes a fiber state calculation processing unit Fcf that obtains an estimated final fiber length Yf and an estimated breakage rate Yn of reinforcing fibers at the end of weighing.
- the solid phase ratio arithmetic processing unit Fcp for obtaining the solid phase ratio Xc of the molten resin at the end of weighing that is, the estimated solid phase ratio Xcs by arithmetic processing based on the input data Di and the solid phase ratio arithmetic formula data Dsc.
- the obtained estimated solid phase ratio Xcs does not necessarily need to be 0 in practice. It is desirable to select "0.06" as this judgment criterion, and this numerical value was confirmed by the results of experiments.
- the estimated solid fraction Xcs is "Xcs ⁇ 0.06"
- the magnitude of the estimated solid fraction Xcs serves as an indicator of the molten state such as insufficient plasticization of the molten resin. Since the estimated solid fraction Xcs indicates the melting level of the molten resin, the unmelted polymer fraction may be used.
- It also has a decomposition rate calculation processing unit Fcr that obtains the resin decomposition rate Xr of the molten resin, that is, the estimated resin decomposition rate Xrs, by calculation processing based on the input data Di and the decomposition rate calculation formula data Dsr.
- the obtained estimated resin decomposition rate Xrs is a value larger than 0.00, it can be understood that the molten resin is in a deteriorated state (including a case where the risk of shifting to a deteriorated state is high).
- "Xrs > 0.00” It can be determined that there is a high risk of transitioning to a deteriorated state or a deteriorated state.
- the magnitude of the estimated resin decomposition rate Xrs can be used as an index indicating the state of deterioration of the molten resin caused by excessive progress of plasticization.
- the decomposition rate calculation processing section Fcr for calculating the estimated resin decomposition rate Xrs by calculation processing based on the input data Di, the molding condition data Ds, and the decomposition rate calculation formula data Dsr is provided in the calculation processing function section Fc, the estimation Since the resin decomposition rate Xrs can be easily obtained by arithmetic processing, the deterioration state of the molten resin can be accurately grasped from the estimated resin decomposition rate Xrs.
- the limit point on one side of the molten state (insufficient plasticization side) due to the estimated solid fraction Xcs since it is possible to set the proper range of the state, it is possible to further improve moldability and molding quality.
- a function of estimating the resin decomposition rate (Xrs) of the screw surface 3f during molding based on the resin data Dr, the molding machine data Dm, and the molding condition data Ds as the molten state of the plasticized resin is provided in the arithmetic processing function unit Fc. If it is included, an accurate physical property value of the resin can be applied to the estimated resin decomposition rate Xrs of the screw surface 3f at the time of molding, so that an accurate and accurate estimated resin decomposition rate Xrs can be obtained.
- the molding support method using this molding support device 1 can basically be used when setting molding conditions before starting production, and is executed by the support program Ps stored in the internal memory 21m.
- the operator launches the support program Ps (step S21).
- the input screen 31 of FIG. 3, which also serves as a setting function, is displayed on the display 5 (step S22).
- the operator uses the data input section Fi on the input screen 31 to input various necessary data, that is, the resin data Dr (step S23) and the molding machine data Dm (step S24).
- the resin data Dr information on reinforcing fibers is input or selected by the reinforcing fiber input unit 32 . That is, the type of reinforcing fiber is selected by the fiber type input unit 32a (step S25), the addition amount of the reinforcing fiber is input by the addition amount input unit 32b (step S26), and the fiber length is input by the fiber length input unit 32c. is selected or input (step S27). Thereafter, a process of setting molding conditions for molding by the injection molding machine M is performed (step S28).
- a predetermined setting screen 35 (detailed drawings are omitted) is displayed on the display 5, and the number of screw revolutions, metering time, back pressure, metering position, front temperature, middle temperature, rear temperature, Molding conditions (molding condition data Ds) related to various physical quantities such as cycle time are set.
- step S29 the "flow analysis start" key 38 displayed on the input screen 31 of FIG. 3 is turned ON (touched) (step S29).
- step S30 the solid phase ratio arithmetic processing unit Fcp, arithmetic processing based on the input data Di, the set molding condition data Ds, and the solid phase ratio arithmetic formula data Dsc is performed (step S30).
- the estimated solid phase ratio Xcs based on the input data Di and the molding condition data Ds is calculated.
- step S31 calculation processing based on the input data Di, the molding condition data Ds, and the decomposition rate calculation formula data Dsr is performed (step S31).
- the estimated resin decomposition rate Xrs is calculated based on the input data Di and the molding condition data Ds.
- the estimated final fiber length Yf and the estimated breakage rate Yn of the reinforcing fibers in the discharged resin at the end of weighing are obtained by the fiber condition calculation processing unit Fcf.
- the breakage rate Yn of the reinforcing fibers is estimated by a preset calculation formula, data table, or the like, and the final fiber length Yf is estimated (step S32).
- the fiber condition calculation processing unit Fcf estimates the breakage rate Yn of the reinforcing fibers using a preset calculation formula, data table, or the like. This estimation processing is performed as follows.
- FIG. 10 shows the result of simulating the breakage rate Yn [%] in the heating cylinder 4 with respect to the screw position using the support program Ps.
- graph P1 (sample 1) is a graph in which 30 [wt%] of "glass long fiber” is added to polypropylene resin (PP)
- graph P2 is a graph in which "glass long fiber” is added to PP.
- Graph P3 (sample 3) is a graph in which 10 [wt%] is added
- graph P3 (sample 3) is a graph in which 30 [wt%] of "glass short fiber” is added to PP
- graph P4 (sample 4) is a graph in which "glass short fiber” is added to PP
- Graph P5 (Sample 5) shows a graph in which 30 [wt %] of "glass short fiber” is added to polyamide 66 resin (PA66).
- sample 5 shows the condition that is most difficult to break, and the reason for this is considered to be the low viscosity and the short plasticization time.
- the fiber state calculation processing unit Fcf has a function of obtaining the estimated final fiber length Yf of the reinforcing fibers at the end of weighing. If such a function for obtaining the estimated final fiber length Yf is provided, it is possible to accurately grasp the changing state of the reinforcing fiber by combining it with the estimated breakage rate Yn, so the state of the reinforcing fiber in the molded product can be optimized. By doing so, the strength and quality of the molded product can be further enhanced. As for data on the estimated final fiber length Yf, the final portion of the discharged resin was sampled, and the fibers remaining by the ashing method were obtained by actual measurement.
- output information such as carbonization occurrence probability [%], calorific value [°C], residual solid amount [%], plasticization time [s], etc., can be obtained by arithmetic processing etc. (Step S33).
- the estimated solid fraction Xcs, the estimated resin decomposition rate Xrs, the estimated final fiber length Yf, the estimated breakage rate are Judgment processing is performed for Yn and various output information (step S34).
- the estimated solid phase rate Xcs, the estimated final fiber length Yf, the estimated breakage rate Yn, and the estimated resin decomposition rate Xrs are determined in the arithmetic processing function unit Fc, and this determination is performed.
- the determination processing unit Fcj that outputs the support message data md corresponding to the determination result mj of the processing, the operator can easily grasp the molten state of the molten resin, which is difficult to determine, and quickly perform the necessary countermeasure processing. be able to.
- the support message data md corresponding to this determination result mj is selected and output (step S35). Then, the support message mdd based on the support message data md output from the determination processing section Fcj is displayed on the message display section 5v of the display 5.
- the output processing function unit Fo is provided with the function of displaying the support message mdd based on the support message data md output from the determination processing unit Fcj on the message display unit 5v of the display 5, the operator can use visual means As a result, it is possible to easily grasp the molten state of the molten resin, which is difficult to judge, and to quickly perform necessary countermeasures, thereby improving the efficiency of the production of molded products.
- the output screen 36 includes an estimated individual appearance rate display section 36a on the upper stage, an estimated fiber damage rate display section 36b on the middle stage, and a final data display section 36c including other data display sections on the lower stage. Therefore, the output screen 36 functions as an output processing functional unit Fo that displays information relating to at least one or more of the estimated solid phase rate Xcs and the estimated damage rate Yn on the display 5 .
- the estimated individual phase ratio display section 36a has the screw position on the horizontal axis and the estimated individual phase ratio Xcs obtained by the calculation on the vertical axis.
- the imaginary line Xcsd illustrated as another pattern indicates a state in which plasticization proceeds excessively due to the melting position being too early.
- the phantom line Xcsu indicates a state in which plasticization is insufficient due to the melting position being too late.
- the horizontal axis is the screw position
- the vertical axis is the estimated damage rate Yn obtained by calculation.
- the estimated damage rate Yn displayed in the estimated damage rate display portion 36b of the output screen 36 is the same as the characteristic graph of the simulation result shown in FIG. 10 described above.
- the estimated individual appearance rate Xcs and the estimated damage rate Yn are graphically displayed, so it is possible to easily predict suitability from the graph pattern. Furthermore, in the final data display section 36c, the probability of occurrence of carbonization 36ca (estimated resin decomposition rate Xrs), the amount of heat generated 36cb, the amount of residual solids 36cc, and the plasticization time 36cd are numerically displayed in order from the top, and the added reinforcing fiber , the final fiber length Yf is numerically displayed. Below the final data display section 36c, a message display section 5v including a judgment result display section 36ce and a support message display section 36cf is provided.
- the determination result display section 36ce displays the determination result mj (the example display is "impossible") as “best”, “good”, “acceptable”, “impossible”, etc. based on estimation (prediction) of various data. ) is displayed, and a support message mdd based on the determination result mj is displayed.
- the example shows the support message "Please review the conditions as a whole”.
- step S37, S38 After confirming the output information, for example, if the determination result mj of the determination process is "best", “good” or “acceptable” and the operator determines that molding is possible, the support program is terminated (step S37, S38).
- the determination result mj of the determination process is "impossible”
- correction processing such as correction of the molding condition data Ds or change of the input data Di is performed (step S39).
- the "resume analysis” key is turned ON (touched) (step S40).
- This "resume analysis” key may also be used as the "start flow analysis” key 38 described above.
- FIG. 1 shows a case where the determination result mj of the determination process is "impossible” and the words “please review the conditions as a whole” are displayed as the support message mdd.
- the resin data Dr includes not only the resin itself but also data related to the resin such as the exemplified reinforcing fiber added to the resin. This is a concept that includes data related to molding machines such as peripheral devices. Further, when configuring the data conversion processing function unit Fe, it is desirable to provide a function to display the detailed data input screen Vie having the resin item selection unit 6 and the physical property value input unit 7 on the display 5. Alternatively, the data may be directly written or transferred to the internal memory 21m or the like.
- the physical property value conversion unit 8 has a function of converting using a functional expression Fx obtained from physical property values corresponding to a plurality of different resin temperatures or a modified functional expression Fxe, and a function of converting from physical property values corresponding to a plurality of different resin temperatures.
- a functional expression Fx obtained from physical property values corresponding to a plurality of different resin temperatures or a modified functional expression Fxe
- a function of converting from physical property values corresponding to a plurality of different resin temperatures means having other similar functions, for example, 50 to 100 [°C] is a physical property value K1, 101 to 150 [°C] is a physical property value K2, 151 to 200 [°C] may be a physical property value K3, 201 to 250 [°C] may be a physical property value K4, and so on.
- a preset standard value can be used as the physical property value. Alternatively, it may be a plurality of standard values that can be selected.
- the estimated solid fraction Xcs and the estimated resin decomposition rate Xrs are listed as the estimation functions provided in the arithmetic processing function unit Fc. There may be.
- the molding support device according to the present invention can be used in various injection molding machines that perform molding by injecting plasticized molten resin into a mold using a screw.
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Abstract
Description
固相率Xc=Cx/Cw
=(Cx´/Cw)・(1-ka・Φi)…[式101]
ただし、Φi=f(Tr,Tc)・Φe
樹脂分解率Xr=E・Wa・kb …[式102]
ただし、E=f(W,L,σ,γ,ζ)
Wa∝f(Φm,Φc,Qs)
Claims (7)
- 樹脂に関する樹脂データを設定する樹脂データ設定部と、成形機に関する成形機データを設定する成形機データ設定部と、成形条件に係わる成形条件データを設定する成形条件データ設定部と、前記樹脂データ,前記成形機データ及び前記成形条件データに基づいて可塑化した樹脂の溶融状態を推定する演算処理機能部と、当該演算処理機能部により推定した溶融状態をディスプレイに視覚的に表示する出力処理機能部とを備える射出成形機の成形支援装置であって、前記樹脂データ設定部に設定された樹脂データから樹脂の種類に係わる項目及びこの樹脂における所定の物性に係わる項目を選択する樹脂項目選択部と、選択された樹脂に係わる異なる複数の樹脂温度及び各樹脂温度に対応する物性値を入力する物性値入力部と、任意の樹脂温度に対応する物性値を求める物性値変換部と、前記溶融状態の推定時に当該推定時における前記樹脂温度及びこの樹脂温度に対応する前記物性値変換部により求めた物性値を前記演算処理機能部に付与するデータ変換処理機能部とを備えてなることを特徴とする射出成形機の成形支援装置。
- 前記データ変換処理機能部は、前記樹脂項目選択部及び前記物性値入力部を有する詳細データ入力画面を前記ディスプレイに表示する機能を備えることを特徴とする請求項1記載の射出成形機の成形支援装置。
- 前記物性値変換部は、異なる複数の樹脂温度に対応する物性値から得られる関数式又は修正した関数式を用いて変換する機能を備えることを特徴とする請求項1記載の射出成形機の成形支援装置。
- 前記物性値変換部は、異なる複数の樹脂温度に対応する物性値から得られるデータテーブル又は修正したデータテーブルを用いて変換する機能を備えることを特徴とする請求項1記載の射出成形機の成形支援装置。
- 前記演算処理機能部は、前記データ変換処理機能部を使用しないときは、前記物性値として予め設定した標準値を用いることを特徴とする請求項1記載の射出成形機の成形支援装置。
- 前記演算処理機能部は、可塑化した樹脂の溶融状態として、前記樹脂データ,前記成形機データ及び前記成形条件データに基づいて加熱筒内における溶融樹脂の固相率を推定する機能を含むことを特徴とする請求項1又は5記載の射出成形機の成形支援装置。
- 前記演算処理機能部は、可塑化した樹脂の溶融状態として、前記樹脂データ,前記成形機データ及び前記成形条件データに基づいて成形時におけるスクリュ表面の樹脂分解率を推定する機能を含むことを特徴とする請求項1又は5記載の射出成形機の成形支援装置。
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JP2002331558A (ja) * | 2001-03-07 | 2002-11-19 | Fanuc Ltd | 射出成形機を用いた樹脂評価方法及び装置 |
JP2014000737A (ja) * | 2012-06-19 | 2014-01-09 | Sumitomo Heavy Ind Ltd | 射出成形機 |
JP2015123668A (ja) | 2013-12-26 | 2015-07-06 | 株式会社日本製鋼所 | 可塑化シミュレーション装置、その可塑化シミュレーション方法および可塑化シミュレーションプログラム |
WO2019188998A1 (ja) | 2018-03-27 | 2019-10-03 | 日精樹脂工業株式会社 | 射出成形機の成形支援装置 |
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JP2002331558A (ja) * | 2001-03-07 | 2002-11-19 | Fanuc Ltd | 射出成形機を用いた樹脂評価方法及び装置 |
JP2014000737A (ja) * | 2012-06-19 | 2014-01-09 | Sumitomo Heavy Ind Ltd | 射出成形機 |
JP2015123668A (ja) | 2013-12-26 | 2015-07-06 | 株式会社日本製鋼所 | 可塑化シミュレーション装置、その可塑化シミュレーション方法および可塑化シミュレーションプログラム |
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