CN103093062A - Parametric analysis method of effect of injection molding process to plastic part buckling deformation - Google Patents
Parametric analysis method of effect of injection molding process to plastic part buckling deformation Download PDFInfo
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Abstract
The invention discloses a parametric analysis method of effect of an injection molding process to plastic part buckling deformation and aims to solve the technical problem that the prior parametric analysis method of plastic part buckling deformation is low in efficiency. The technical scheme is that the parametric analysis method of effect of the injection molding process to plastic part buckling deformation comprises of first, conducting secondary development to a commercialize mold flow analysis software MoldFlow to achieve parametric calculation and background execution of injection molding numerical modeling; then embedding MoldFlow secondary development procedures into an open-type multidisciplinary parametric analysis and optimization design platform BOSS Quattro, and automatically modifying process parameters according to a BOSS Quattro parametric analysis module and invoking the MoldFlow secondary development procedures to calculate plastic part buckling deformation; and last, acquiring plastic part buckling deformation under conditions of different process parameter values after automatically modifying and calculating the plastic part buckling deformation for several times. Analysis results of the parametric analysis method of effect of the injection molding process to plastic part buckling deformation provides variation tendencies of buckling deformation within each parameter value range, and provides the basis for arrangement of process parameters in the practical production. The whole analysis process is automatically finished, human input is reduced and analysis efficiency is improved.
Description
Technical field
The present invention relates to a kind of Parametric Analysis method of plastic buckling deformation, particularly relate to a kind of injection molding process to the Parametric Analysis method of plastic buckling deformation impact.
Background technology
Buckling deformation is one of common deficiency of injection-molded plastic goods, has a strong impact on the quality of product.The influence factor of buckling deformation is a lot, specifically comprises mould structure, plastic material, molding technique parameter etc.In actual forming process, after plastic material and mould structure were determined, molding technique parameter just became the principal element that affects buckling deformation.The impact of each technological parameter on the plastic buckling deformation in the reasonable analysis forming process obtained technological parameter to the rule that affects of buckling deformation, can provide necessary reference frame for reasonable processing parameters, the buckling deformation of minimizing plastic.
Be applied to analyze molding technique parameter the technology that the plastic buckling deformation affects mainly contained following two kinds:
In above method, the experimental technique cost is high, efficient is low, although the Finite Element Numerical Simulation method has reduced cost, also has inefficient problem, so these existing methods can't be analyzed injection molding process efficiently on the impact of plastic buckling deformation.
Summary of the invention
In order to overcome the inefficient deficiency of Parametric Analysis method of existing plastic buckling deformation, the invention provides a kind of injection molding process to the Parametric Analysis method of plastic buckling deformation impact.At first the method carries out secondary development to commercialization mold flow analysis software MoldFlow, realize parametrization calculating and the backstage execution of injection mo(u)lding numerical simulation, then MoldFlow secondary development program is embedded open multidisciplinary Parametric Analysis and optimal design platform BOSS Quattro, utilize the Parametric Analysis module of BOSS Quattro, automatically revise technological parameter and call MoldFlow secondary development program and calculate plastic buckling deformation amount, after repeatedly automatically revising, calculating, obtain the plastic buckling deformation amount under the different technical parameters value.The impact of analysis process parameter on the plastic buckling deformation fast and effectively.
The technical solution adopted for the present invention to solve the technical problems is: the Parametric Analysis method of a kind of injection molding process on plastic buckling deformation impact is characterized in comprising the following steps:
Step 1: the second development interface that provides according to MoldFlow software, utilize programming language Visual Basic to write MoldFlow secondary development program, the parametrization that realizes simulation of injection molding automatically performs, and comprises the importing of plastic finite element grid model, the value of technological parameter, the finite element analysis of buckling deformation and the output of completing the rear maximum buckling deformation value of analysis.
Step 2: utilize programming language Visual Fortran to write nested procedure, realize that MoldFlow secondary development program and open multidisciplinary Parametric Analysis and optimal design platform BOSS Quattro's is nested.
Step 3: based on the Parametric Analysis module of Boss Quattro, the appointment corresponding process parameters is variable, take maximum warp value as objective function, and the step-length that when providing the span of each variable and Parametric Analysis, each step changes.In each step of Parametric Analysis, Boss Quattro upgrades process parameter value automatically, calls MoldFlow secondary development program and obtains maximum warp value.Automatically after completing step analysis, the maximum buckling deformation amount of plastic under output different technical parameters value.
Step 4: draw the maximum buckling deformation value of plastic with the change curve of technological parameter, thereby obtain different injection-mold process parameters to the impact of plastic buckling deformation.
The invention has the beneficial effects as follows: due to the method with the embedding parameter fractional analysis of MoldFlow secondary development program and optimal design platform Boss Quattro, realized the parametrization execution of injection mo(u)lding numerical simulation, automatically calculate the goods buckling deformation amount under the different technical parameters value, thus the impact of analysis process parameter on the plastic buckling deformation fast and effectively.Analysis result provides the variation tendency of buckling deformation in the parameters span, for the setting of technological parameter in actual production provides foundation, and can provide technical foundation for further process parameter optimizing.Analytic process is all completed automatically, has reduced human input, has improved analysis efficiency.
Below in conjunction with drawings and Examples, the present invention is elaborated.
Description of drawings
Fig. 1 is the finite element grid illustraton of model of the inventive method embodiment phone housing.
Fig. 2 is that the mold temperature that obtains of the inventive method embodiment is on the distribution plan that affects of maximum warp value.
Fig. 3 is that the melt temperature that obtains of the inventive method embodiment is on the distribution plan that affects of maximum warp value.
Fig. 4 is that the dwell pressure that obtains of the inventive method embodiment is on the distribution plan that affects of maximum warp value.
Fig. 5 is that dwell time of obtaining of the inventive method embodiment is on the distribution plan that affects of maximum warp value.
Embodiment
Injection molding process of the present invention is as follows on the Parametric Analysis method concrete steps of plastic buckling deformation impact:
With reference to Fig. 1～5.The research object that the present embodiment is chosen is certain model phone housing, and shell geometric model thickness is 1mm, and length is respectively 130mm, 55mm, 11mm.Injected plastics material is PC/ABC, and the trade mark is MultilonTN-3812B, adopts single cast gate running gate system.Select mold temperature, melt temperature, dwell pressure, dwell time as the analytic target of the present embodiment.
Step 1: the second development interface that provides according to MoldFlow software, utilize programming language Visual Basic to write MoldFlow secondary development program, the parametrization that realizes simulation of injection molding automatically performs, the output of maximum buckling deformation value etc. after the finite element analysis and completing that comprises value, the buckling deformation of importing, the technological parameter (mold temperature, melt temperature, dwell pressure, dwell time) of phone housing finite element grid model is analyzed.
Step 2: utilize programming language Visual Fortran to write nested procedure, realize that MoldFlow secondary development program and open multidisciplinary Parametric Analysis and optimal design platform BOSS Quattro's is nested.
Step 3: based on the Parametric Analysis module of Boss Quattro, specifying mold temperature, melt temperature, dwell pressure, dwell time is variable, the maximum warp value of phone housing is as objective function after the moulding, in conjunction with the injection mo(u)lding characteristics of thin-walled parts and the performance of injected plastics material, the step-length that when span of given each variable and Parametric Analysis, each step changes, as shown in table 1.In each step of Parametric Analysis, Boss Quattro upgrades process parameter value automatically, calls MoldFlow secondary development program and carries out the forming process simulation, obtains the maximum warp value of phone housing.Automatically after completing step analysis, the maximum buckling deformation amount under output different technical parameters value.
Table 1 technological parameter span and step-length
Step 4: draw the maximum buckling deformation value of phone housing with the change curve of technological parameter, obtain different injection-mold process parameters to the impact of phone housing buckling deformation.
As can see from Figure 2, the buckling deformation of phone housing increases along with the rising of mold temperature.As can see from Figure 3, melt temperature is nonmonotonic on the impact of phone housing buckling deformation, when melt temperature is low, rising along with melt temperature, the buckling deformation of phone housing reduces gradually, after melt temperature is elevated to uniform temperature, it is large that buckling deformation will become along with the rising of melt temperature.As can see from Figure 4, dwell pressure is less on the impact of phone housing buckling deformation, and along with the maximum of dwell pressure, slight minimizing occurs in buckling deformation.As can see from Figure 5, there is nonmonotonic impact in the dwell time equally on the phone housing buckling deformation, and along with the growth of dwell time, buckling deformation first reduces and increases, and after the dwell time increased to certain value, buckling deformation substantially no longer changed.
Claims (1)
1. an injection molding process on the Parametric Analysis method that the plastic buckling deformation affects, is characterized in that comprising the following steps:
Step 1: the second development interface that provides according to MoldFlow software, utilize programming language Visual Basic to write MoldFlow secondary development program, the parametrization that realizes simulation of injection molding automatically performs, and comprises the importing of plastic finite element grid model, the value of technological parameter, the finite element analysis of buckling deformation and the output of completing the rear maximum buckling deformation value of analysis;
Step 2: utilize programming language Visual Fortran to write nested procedure, realize that MoldFlow secondary development program and open multidisciplinary Parametric Analysis and optimal design platform BOSS Quattro's is nested;
Step 3: based on the Parametric Analysis module of Boss Quattro, the appointment corresponding process parameters is variable, take maximum warp value as objective function, and the step-length that when providing the span of each variable and Parametric Analysis, each step changes; In each step of Parametric Analysis, Boss Quattro upgrades process parameter value automatically, calls MoldFlow secondary development program and obtains maximum warp value; Automatically after completing step analysis, the maximum buckling deformation amount of plastic under output different technical parameters value;
Step 4: draw the maximum buckling deformation value of plastic with the change curve of technological parameter, thereby obtain different injection-mold process parameters to the impact of plastic buckling deformation.
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| CN105415588A (en) * | 2015-12-28 | 2016-03-23 | 河海大学常州校区 | Injection molding process and mold for remote controllers |
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| CN106599397A (en) * | 2016-11-28 | 2017-04-26 | 西北工业大学 | Method for detecting non-uniform yield stress of formed thin-walled large-curvature polycarbonate plastic part |
| CN108153923A (en) * | 2016-12-05 | 2018-06-12 | 合肥杰事杰新材料股份有限公司 | A kind of Finite Element Method of thermoplastic composite water container product leakproofness |
| CN110502779A (en) * | 2019-07-03 | 2019-11-26 | 广东工业大学 | A kind of Intelligentized design method of the injection forming mold based on fuzzy reasoning |
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Application publication date: 20130508 |