JP2006015534A - Display method of analytic result of injection molding process, method for setting and supporting injection molding condition, apparatus for setting and supporting injection molding condition, program and memory medium - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To easily extract a region wherein the surface temperature of an injection mold and the temperature of a molded product are within a specific temperature range to discriminate this region from another region to display the same. <P>SOLUTION: A result output part 3 inputs the numerical value analytical result 1 of an injection molding process and a temperature evaluation data base 2 to output them for the purpose of displaying a target region and has a discriminator imparting part 4 for imparting a discriminator to the target region independent of another target region to compare the target region with another target region to display the same, a number output part 5 for outputting the number of the independent regions, a discriminator list forming part 6 for forming a discriminator list other than the discriminator to output the same and a discriminator list selection part 7 for selecting the discriminator list. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to a method for displaying an analysis result of an injection molding process, an injection molding condition setting support method, an injection molding condition setting support device, a program, and a storage medium.

  In general, in injection molding, if there is a thick part in the molded product, heat is accumulated in that part, causing molding defects called sinks or voids in the periphery, or until the temperature reaches a temperature at which it can be removed. As a result, it is necessary to keep the product cooled, which may prolong the molding cycle and increase the cost.

  In order to examine the possibility of sink marks due to heat storage before molding, a method for predicting the temperature state by performing mold cooling analysis has been proposed and implemented. Mold cooling analysis results performed on commercially available injection molding CAE systems “3D TIMON” (Toray Industries, Inc.), “MOLDFLOW” (MOLDFLOW), “Planets” (Plamedia), etc. The state is evaluated by displaying the whole shape or the designated portion or cross section with a gray scale diagram or contour lines. In addition, “FEMAP” (manufactured by UGS PLM Solutions), “IDEAS” (manufactured by EDS PLM Solutions), “PATRAN” (manufactured by MSC. Software), etc., are commercially available display systems for analysis results. In addition, a function for displaying physical quantities such as temperature, stress, pressure, etc. on the entire shape or on a specified portion or cross section by means of gray scale display, contour line display, etc. is mounted. In these systems, when displaying a target part within a specific temperature range, it is possible to display a part within a specific temperature range by specifying a specific temperature range, maximum value, minimum value, etc. and displaying contour lines. Although it is possible, it is difficult to distinguish whether the parts are independent or continuous, and information such as how many independent target parts exist cannot be output.

  Methods for displaying analysis results at high speed are described in Patent Document 1 (“Analysis simulation apparatus and its high-speed display method”) and Patent Document 2 (“Numerical simulation result display system and display method”).

  Furthermore, an evaluation method for judging the suitability of the shape based on whether or not the temperature distribution obtained by conducting the heat conduction analysis of the molded product is within the allowable temperature range determined for each resin is disclosed in Patent Document 3 (“Resin molded product”). Manufacturing method ").

In any of the above cases, there is no description about extracting a part whose analysis result is in a specific range and displaying it in a distinguishable manner from other parts.
JP-A-9-305657 JP-A-10-312152 JP-A-7-52220

  In the above-described conventional technology, when predicting a hot part where sink marks may occur in an injection-molded product, a mold cooling analysis is performed, and when the temperature at the time of removal is displayed in shades or contour lines, it is removed for each resin. A possible temperature was set, and a part having a higher temperature was displayed and evaluated. However, in gray scale display and contour line display, it is difficult to distinguish whether the parts are independent or continuous, and the number of parts cannot be easily determined.

  In addition, for those who have little knowledge of the temperature that can be taken out, which is generally determined for each resin or similar shape, in order to determine the existence and position of the temperature range where sink marks are likely to occur, the opinions of experts are heard. In other words, it is necessary to refer to literatures, input a temperature value that can be taken out, and display and judge a region where the temperature is higher than the input temperature value.

  Furthermore, neither Patent Document 1 nor Patent Document 2 describes at all about displaying the analysis result in an easily recognizable manner, and Patent Document 3 extracts a target site in a specific temperature range. No indication is given regarding the display.

  The present invention has been made in view of the above points. The surface temperature of the injection mold and the temperature of the injection-molded product are easily extracted from a specific temperature range in which defects are likely to occur, and are separated from other regions. By displaying separately, the object is to make it possible to recognize the presence / absence and number of parts with a high possibility of occurrence of defects, and position information of the parts.

  In order to solve the above problems, according to one aspect of the present invention, a result of numerical analysis of an injection molding process is obtained, and a mold surface or injection molding in the injection molding process is obtained based on the obtained numerical analysis result. There is provided a method for displaying an analysis result of an injection molding process, wherein a target part having a product temperature in a specific temperature range is extracted and displayed so that the extracted target part can be distinguished from other parts.

  According to another aspect of the present invention, the specific temperature range is set by reading from a database stored as data related to the shape of a resin used for injection molding or an injection molded product. The method for displaying the analysis result of the injection molding process described in 1) is provided.

  According to another aspect of the present invention, when displaying the target site, an identifier is assigned to the target site independent of the other, and the identifier is displayed in correspondence with the target site. A method for displaying an analysis result of an injection molding process according to claim 1 or claim 2 is provided.

  According to another aspect of the present invention, the number of target portions in the mold or the injection-molded product is further calculated, and the number is output. The method for displaying the analysis result of the injection molding process described in 1) is provided.

  According to another aspect of the present invention, there is provided a method for displaying an analysis result of an injection molding process according to claim 3 or 4, wherein the target portion is displayed as a list.

  According to another aspect of the present invention, the selection of the target portion is further accepted, and a region including the selected target portion is enlarged and displayed at the center of the display screen correspondingly. The method for displaying the analysis result of the injection molding process described in 1) is provided.

  According to another aspect of the present invention, (1) a step of setting injection molding conditions, (2) a step of numerically analyzing an injection molding process when injection molding is performed based on the injection molding conditions, (3) A step of extracting a target part in which the temperature of the mold surface or the molded product in the injection molding process is within a specific temperature range based on the result of the numerical analysis; (4) when displaying the extracted target part; And (5) storing the injection molding condition, the result of the numerical analysis, and the position and number of the target part as a history. There is provided a method for assisting setting of injection molding conditions, comprising the step of storing in means, and (6) a step of accepting a change in the injection molding conditions.

  According to another aspect of the present invention, in the case where the steps (1) and after are repeated after the steps (1) to (6) are executed, the extraction is performed in the step (4) executed after the second time. The identifier corresponding to the previous identifier is assigned to each of the target parts that has been assigned in the previous step (4). An injection molding condition setting support method is provided.

  According to another aspect of the present invention, setting means for setting injection molding conditions, and analysis means for numerically analyzing an injection molding process when injection molding is performed based on the injection molding conditions set by the setting means; The extraction means for extracting the target portion where the temperature of the mold surface or the molded product in the injection molding process is in a specific temperature range based on the output result of the numerical analysis means, and the target portion extracted by the extraction means. When displaying, an identifier is assigned to the target part independent of the others, and the display unit displays the identifier in correspondence with the target part, the injection molding condition, the result of the numerical analysis, and the position and number of target parts. And an injection molding condition setting support device characterized by comprising storage means for storing as a history.

  According to another aspect of the present invention, there is provided a program for causing a computer to execute each step of the method for displaying an analysis result of an injection molding process according to any one of claims 1 to 6.

  According to another aspect of the present invention, there is provided a computer-readable storage medium storing the program according to claim 10.

  According to another aspect of the present invention, there is provided a method for displaying an analysis result of an injection molding process according to claim 1, wherein the specific temperature / range is equal to or higher than a predetermined temperature.

  Further, according to another aspect of the present invention, the injection molding process analysis result according to claim 3, wherein the selection of the target portion is further received, and an area including the selected target portion is highlighted. A display method is provided.

  According to another aspect of the present invention, the result of numerical analysis of the injection molding process is acquired, and the thickness of the mold surface or the injection molded product in the injection molding process is determined based on the acquired numerical analysis result. There is provided a method for displaying an analysis result of an injection molding process, wherein a target part in a specific thickness range is extracted and displayed so that the extracted target part can be distinguished from other parts.

  According to another aspect of the present invention, a program for executing the display method of claim 14 is provided.

  According to another aspect of the present invention, a storage medium storing the program according to claim 15 is provided.

  Here, “output” includes “file output” in addition to “display”. The “identifier” may be a “number” or some “symbol”. The “identifier corresponding to the previous identifier” is not limited to the same identifier. For example, in the first analysis, 1-1, 1-2, 1-3, and 1-4 are set. n-1, n-4, etc. may be set, and 1-4 and n-4 may relate to the same target portion.

  According to the present invention, it is possible to automatically extract the presence or absence of a high temperature part and a high temperature part which are problematic on the surface of an injection mold and an injection molded product, and easily recognize information on the part.

  Furthermore, it becomes easy to determine the presence and degree of effect when the shape of the molded product and the molding conditions are changed.

  Preferred embodiments of the present invention will be described below in detail with reference to the accompanying drawings. Although the embodiments described below are preferred embodiments of the present invention, various technically preferable limitations are applied thereto, but the scope of the present invention is particularly limited in the following description. Unless otherwise stated, the present invention is not limited to these forms.

  A first preferred embodiment of the present invention will be described with reference to FIG. 1 in FIG. 1 is a result of numerical analysis of the injection molding process. For example, information itself such as a mold surface temperature distribution and a mold product temperature distribution at the time of mold release, which is a result of mold cooling analysis, and such information. This is so-called raw data as a result of numerical analysis that can extract. Reference numeral 2 denotes an evaluation database related to the shape of the resin or molded product, in which the mold surface temperature, the extraction range of the molded product temperature, and the like are registered. A result output unit 3 reads the analysis result 1 and the extraction temperature range registered in the evaluation database 2 and automatically outputs the target part for display. When the result output unit 3 is instructed to assign an identifier, the identifier assigning unit 4 assigns an identifier to a target site independent of other target sites, and compares the target site with other target sites. Enable to display. When the output of the number of independent parts is instructed from the identifier assigning unit 4, the number of independent parts is output by the number output part 5 of independent parts. When the output of the list for each target part identified by the identifier assigning unit 4 is instructed, the identifier list creating unit 6 determines the position information such as the area center of gravity of the target part and the maximum / minimum / Create and output information (identifier list) such as average temperature. Reference numeral 7 denotes an identifier list selection unit. By selecting an identifier list created and output by the identifier list creation unit 6, a selection result for displaying the target site in the center of the display screen is output. Reference numeral 8 denotes the output result of the target part, and the target part (identifier and selected identifier list) can be exemplified.

  Here, the operations of the identifier assigning unit 4, the independent part number outputting unit 5, the identifier list creating unit 6, and the identifier list selecting unit 7 in the result output unit 3 may be performed in an interactive manner or created in advance. It may be automatically performed by reading a file in which an operation command is described.

  FIG. 12 shows an information processing apparatus that displays an analysis result as a hardware resource of the present embodiment.

In FIG. 12, the information processing apparatus 101 includes a CPU 102, a RAM 103, a ROM 104, a display device 105, a secondary storage device 106, an interface I / F 107, and an input device 108, respectively. The CPU 102 performs overall control of the information processing apparatus 101. The RAM 102 is a readable / writable memory, and is used as an area for reading and developing the processing program in the present embodiment stored in the ROM 104. The CPU 102 executes display processing of the result output unit 3 to the identifier list selection unit 7 shown in FIG. 1 based on the developed program. The display unit 105 is for actually displaying the output result 8 of the target part processed by the CPU 102 on the display screen, and is configured by a CRT, a liquid crystal display, or the like.

  The secondary storage device 106 stores information related to the analysis result 1 analyzed in advance, and fulfills the function of the evaluation database 2. The I / F 107 is an interface for communicating analysis results connected to the outside such as a network and information as an evaluation database, and it is also possible to display the analysis results analyzed by the external device. is there. The input device 108 is used for inputting changes in conditions of the temperature range and the thick wall range to be extracted, and is configured by a mouse, a keyboard, and the like.

  Next, a second preferred embodiment of the present invention will be described with reference to FIG. 2 in FIG. 2 is an injection molded product condition setting unit for setting injection molding conditions necessary for the analysis including the analysis shape, resin, and molding conditions of the injection molded product. A numerical analysis unit 10 numerically analyzes the injection molding process based on the injection molding conditions. Reference numeral 11 denotes an analysis result obtained by the numerical analysis. Information on the mold surface temperature distribution, the temperature distribution of the injection-molded product itself, so-called raw data as a result of the numerical analysis capable of extracting such information, and the like. It can be illustrated. Reference numeral 12 denotes an evaluation database related to the shape of a resin or a molded product, in which a mold surface temperature, a molded product temperature extraction range, and the like are registered. Reference numeral 13 denotes a result output unit, which extracts and outputs a target portion whose die surface temperature or molded product temperature is within the extraction range registered in the evaluation database 12 (the function of this result output unit 13 is The result output unit 3 of the first embodiment shown in FIG. 1 is substantially equivalent). Reference numeral 14 denotes a target part information recording unit, which records the number of parts and position information of each part in addition to the identifier when outputting the target part. Reference numeral 15 denotes an output result of the target part. As described in the first preferred embodiment of the present invention, an identifier is assigned, and an independent number is exemplified as the output result. Reference numeral 16 denotes an injection molding condition change accepting unit. When a change command is accepted, the process returns to the injection molded product condition setting unit 9 to change the injection molding condition. Hereinafter, the numerical analysis unit 10, the analysis result 11, the result output unit 13, and the purpose The operations of the part information storage unit 14 and the target part output result 15 are repeated. Reference numeral 17 denotes a comparison unit with the last output target part information. When this is repeated, the last output target part information is compared with the current target part, and the identifier assigned to the last output target part exists. The identifier corresponding to the previous identifier is assigned. Here, the identifier corresponding to the previous identifier may be the same. For example, in the first analysis, 1-1, 1-2, 1-3, and 1-4 are set. The n-th time is set to n-1, n-4, etc., and 1-4 and n-4 may relate to the same target part. By doing in this way, it can be easily judged not only the number of target parts but also which part the effect when changing the injection molding condition is applied.

  Also in the second preferred embodiment, the information processing apparatus shown in FIG. 12 can be applied as a hardware resource. In the case of the present embodiment, the processing such as the injection condition setting unit 9, the numerical analysis unit 10, the result output unit 13, the comparison unit 17 with the target part of the previous output shown in FIG. Executed by the CPU 102. Further, the secondary storage device 106 (or RAM 103) functions as a storage of information relating to the analysis result 1 analyzed in advance, the evaluation database 2 and the information storage unit 14 of the target part. Further, the display device 105 displays information on the output result 15 of the target part, and the input device 108 functions as the injection molding condition change receiving unit 16.

  The extraction of the target part may refer to the wall thickness as well as the temperature. The analysis result 11 is thickness information calculated numerically from the analysis shape input by the injection molded product condition setting unit 9, and the evaluation database 12 may be a thickness database of a molded product related to the resin. For example, if thickness information that is highly likely to cause sink marks is obtained, the thickness information is numerically calculated by the numerical analysis unit 10 from the shape of the molded product input in the injection molded product condition setting unit 9, By outputting to the analysis result 11 and executing the output of the thicker part registered in the evaluation database 12 by the result output unit 13, it is possible to easily confirm the existence and number of parts that are likely to cause sink marks. The effect when the shape is changed by the injection molding condition change receiving unit 16 can also be easily confirmed by comparing the target part information with the target part information output last time and outputting the target part.

  Hereinafter, a method for displaying an analysis result of an injection molding process and a method for supporting setting of injection molding conditions according to the present invention will be described in detail with reference to the drawings, taking a resin molded product as an example.

[Example 1]
Here, the example which extracted and displayed the high temperature part in the box-shaped resin injection molded product is demonstrated. This molded product has an outer dimension of 100 mm in width, 50 mm in depth, and 30 mm in height, and is divided into 3 × 2 rooms by ribs arranged inside. The rib plate thickness is 2 mm, and the bottom plate thickness of each room is different from 2 mm to 10 mm. FIG. 3 shows a three-dimensional analytical shape model of the box-shaped molded product. FIG. 4 shows an analysis shape in which a cooling pipe and a mold outer wall for performing mold cooling analysis of the box-shaped molded product are defined. Table 1 shows molding conditions for molding the box-shaped molded product with ABS resin.

  The analysis result 1 of FIG. 1 is obtained by reading the mold surface temperature and the molded product temperature, which are the results of the mold cooling analysis under the injection molding conditions shown in FIG. FIG. 5 is a diagram showing an average temperature in the thickness direction of the molded product at the time of mold release, and displays the entire analysis shape. FIG. 6 is a diagram showing the plate thickness direction average temperature of the molded product displayed as a result in the result output unit 3 of FIG. 1, and the plate thickness direction average temperature at the time of extrusion with the resin set in the evaluation database 2. The high temperature part which is 90 degreeC or more which is extraction temperature is shown. By displaying in this way, it can be easily determined that there are two high temperature portions that are likely to cause molding defects.

  FIG. 7 is a diagram showing a result of comparing and displaying the identifier given to the high temperature part of FIG. 6 by the identifier assigning unit 4 of FIG. FIG. 8 is a diagram showing an example in which the high temperature part compared with the identifier in FIG. 6 is displayed as the identifier list 18 and the number 19 is output at the same time, and the number of high temperature parts can be easily determined. FIG. 9 is a diagram showing a result of moving the part to the center of the display screen by selecting the identifier 2 in the identifier list 18 and displaying it in an enlarged manner, and it can be seen that the position can be easily confirmed.

  The selected part is different from the unselected part in order to distinguish it from the unselected part in the identifier list 18 as well as to enlarge and display the part in the center of the screen. Emphasis display processing such as color display or blinking display of a selected part may be performed.

[Example 2]
Here, the Example which confirmed the effect by the shape change in the resin molded product with which the rib was added to the flat plate is described. FIG. 10 is a diagram illustrating an example of a high temperature part of the average temperature in the thickness direction of the molded product at the time of mold release by performing mold cooling analysis. You can see that. FIG. 11 is a diagram showing a result of analysis performed under the same conditions with a shape in which some ribs of the shape of FIG. When there is an identifier assigned to the previous high temperature part, an operation for assigning the same identifier is performed. As a result, it is possible to instantaneously determine that the high temperature portion after the shape change has been reduced to three locations and that the heat storage state at the positions of the identifier 2 and the identifier 4 that existed in the shape before the change has been improved.

  The present invention can be applied not only to the analysis result of the injection molding process but also to a general analysis result display method and article shape design support method.

It is a figure which shows the 1st preferable embodiment of this invention. It is a figure which shows the 2nd preferable embodiment of this invention. It is a figure which shows the three-dimensional analysis shape of a box-shaped molded product. It is a figure which shows a metal mold | die cooling analysis shape. It is a board thickness direction average temperature distribution map of the molded product at the time of mold release. It is the figure which displayed the high temperature part whose plate | board thickness direction average temperature of the molded article at the time of mold release is 90 degreeC or more. It is the figure which gave the identifier and output to the high temperature part of FIG. It is the figure which gave the list | wrist output the number of the site | parts which become a high temperature part, providing the identifier to the high temperature part of FIG. It is the figure which displayed the said site | part in the center part of the display screen by selecting the identifier output as a list in FIG. It is the figure which gave the identifier the high temperature part of the flat plate with a rib, and displayed it as a list. It is the figure which gave the identifier and gave a list display the high temperature part of the result of having changed a part of shape of Drawing 10, and reanalyzing.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Analysis result 2 ... Evaluation database 3 ... Result output part 4 ... Identifier assignment part 5 ... Number of independent part output part 6 ... Identifier list creation part 7 ... Identifier list Selection unit 8 ... Output result 9 of target part ... Injection molding condition setting unit 10 ... Numerical analysis unit 11 ... Analysis result 12 ... Evaluation database 13 ... Result output unit 14 ... Information storage unit 15 of target part ... Output result 16 of target part ... Injection molding condition change accepting part 17 ... Comparison part 18 with information of target part output last time ... Identifier list 19 ...・ Number of target parts 20... Selected identifier 21... Identifier list 22.

Claims (16)

  Obtaining a result of numerical analysis of the injection molding process, and extracting a target portion where the temperature of the mold surface or the injection molded product in the injection molding process is in a specific temperature range based on the obtained numerical analysis result, A method for displaying an analysis result of an injection molding process, wherein the extracted target part is displayed so as to be distinguished from other parts.   2. The display of the analysis result of the injection molding process according to claim 1, wherein the specific temperature range is set by reading from a database stored as data related to a shape of a resin used for injection molding or an injection molded product. Method.   3. The injection molding according to claim 1, wherein when the target part is displayed, an identifier is assigned to the target part independent of the other, and the identifier is displayed in correspondence with the target part. How to display process analysis results.   The display of the analysis result of the injection molding process according to any one of claims 1 to 3, wherein the number of the target portions in the mold or the injection-molded product is further calculated and the number is output. Method.   5. The method for displaying an analysis result of an injection molding process according to claim 3, wherein the target part is displayed in a list.   The display of the analysis result of the injection molding process according to claim 3, wherein the selection of the target part is further received, and an area including the selected target part is enlarged and displayed in the center of the display screen correspondingly. Method.   (1) a step of setting injection molding conditions, (2) a step of numerically analyzing an injection molding process when injection molding is performed based on the injection molding conditions, and (3) the injection molding based on the results of the numerical analysis. A step of extracting a target portion where the temperature of the mold surface or injection-molded product in the process is within a specific temperature range; (4) when displaying the extracted target portion, an identifier is given to the target portion independent of others Displaying the identifier in correspondence with the target part, (5) storing the injection molding condition, the result of the numerical analysis, and the position and number of the target part in the storage means, and (6 ) An injection molding condition setting support method comprising a step of accepting a change in the injection molding condition.   In the case where the steps (1) and subsequent steps are further repeated after the steps (1) to (6) are performed, the target sites extracted in the step (4) executed after the second time are previously determined. 8. The injection molding condition setting support method according to claim 7, wherein when an identifier assigned in the step (4) exists, an identifier corresponding to the previous identifier is assigned.   Setting means for setting injection molding conditions, analysis means for numerically analyzing an injection molding process when injection molding is performed based on the injection molding conditions set by the setting means, and based on an output result of the numerical analysis means In the injection molding process, an extraction means for extracting a target portion where the temperature of the mold surface or the molded product is in a specific temperature range, and the target portion that is independent from others when displaying the target portion extracted by the extraction means Display means for assigning an identifier and displaying the identifier in correspondence with the target part, and storage means for storing the injection molding condition, the result of the numerical analysis, and the position and number of the target part as a history. An injection molding condition setting support apparatus characterized by that.   The program for making a computer perform each process of the display method of the analysis result of the injection molding process in any one of Claims 1-6.    A computer-readable storage medium storing the program according to claim 10.   The method for displaying an analysis result of an injection molding process according to claim 1, wherein the specific temperature range is equal to or higher than a predetermined temperature.   The method for displaying an analysis result of an injection molding process according to claim 3, further receiving selection of the target part and highlighting a region including the selected target part.   Obtain the result of numerical analysis of the injection molding process, and extract the target part where the thickness of the mold surface or the injection molded product in the injection molding process is in a specific thickness range based on the result of the obtained numerical analysis And displaying the analysis result of the injection molding process, wherein the extracted target part is displayed so as to be distinguished from other parts.  A program for executing the display method according to claim 14. A storage medium storing the program according to claim 15.

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