Blow Molding CAE System
SIMBLOW
Software features
Analysis of a wide range of blow molding processes
SIMBLOW analyzes each process in extrusion blow molding, from parison extrusion to inflation. SIMBLOW also analyzes injection blow molding and thermo forming.
* Analysis of extrusion blow molding, injection blow molding, and thermo forming SIMBLOW analyzes the hot parison stage of injection blowing and the blow/injection stage of injection blow molding—in combination with the injection molding CAE program PLANETS and the extrusion molding CAE program SUNDYXTRUD.
Highly accurate material models
SIMBLOW supports highly accurate quantitative models of material properties—the K-BKZ viscoelesticity model and a practical viscoplasticity model.
General-purpose element library
SIMBLOW features an extensive element library from which users can select films, plane/axis symmetries, 3D-solids and other types of elements, depending on the analysis model and required accuracy.
Thickness- profile optimization analysis
SIMBLOW's optimization analysis function computes the initial thickness profile of the parison, pre-form, or sheet required to achieve the specified thickness profile of the final molded part.

System components
System components

RHEOCALC
Characterization of material properties and simplified extrusion analysis
RHEOCALC uses rheological property measurement data to determine the parameters of the material models (K-BKZ viscoelesticity model, viscoplasticity model) that become input data for the BLOWUP3DF large-deformation structural analysis program. In addition, RHEOCALC performs a simple analysis of the parison extrusion stage of extrusion blow molding.
Determination of viscoelastic model parameters
K-BKZ model fitting of transient uni-axial elongation elongational viscosity
The K-BKZ model, represented by the following expression, is used in the evaluation of draw-down during the extrusion stage and in the analysis of viscoelasticity in the inflationstage.

The parameters of this model are based on rheological data obtained from actual measurements of dynamic viscosity, elongational viscosity, and other factors.

SUNDYXTRUD
3D free-surface flow analysis
SUNDYXTRUD predicts the extruded geometry of films and parisons through free-surface flow analysis. Parison geometry date predicted by using SUNDYXTRUD become the initial data for the BLOWUP3DF large-deformation analysis, to complete the analysis of the whole extrusion blow molding process. SUNDYXTRUD can also analyze multilayer coextrusion and film coating processes. SUNDYXTRUD is a 3D FEM flow analysis program for extrusion forming that builds on the core technology of the axisymmetric analysis function of the DIFLOW2D parison extrusion analysis program, to permit the handling of 3D analysis models.
Analysis of extrusion geometry (swell)
3D die swell unsteady simulation using the GHF method
The GHF (Generalized Height Function) method predicts 3D extrusion geometry (swell) of films and parisons by unsteady analysis.
Prediction of the extrusion geometry (swell and draw-down coupled phenomena) by unsteady analysis and the effects of parison controllers
Axisymmetric unsteady annular die swell simulation using the LE method (Changing thickness profile near die lip due to the parison controller)
SUNDYXTRUD predicts the axisymmetric extrusion geometry of parison and thermal flow fields by using the LE (Lagrangian Eulerian) method in unsteady analysis. The program can quantify the coupled phenomena of swell and draw-down, as well as the effects of the parison controller.
Analyses of coextrusion and film coating processes
SUNDYXTRUD uses the GHF (Generalized Height Function) method to predict the boundary geometry of steadily extruded multilayer parisons and the geometry of film coating.
Multilayer die swell simulation
(two-material and three-layer)		Multilayer film coating simulation
(two-material and three-layer)

BLOWUP3DF
Viscoplastic and viscoelastic large-deformation structural analysis
The BLOWUP3DF structural analysis program, based on highly stable flow analysis technology, is for large-deformation problems. BLOWUP3DF simulates the behavior of semi-finished shapes, such as parisons, films and pre-forms, when they are inflated and confined in the mold. BLOWUP3DF predicts the change over time in material thickness and temperature distribution. You can select your material model from either a viscoplasticity model or K-BKZ viscoelesticity model. A thickness-driven optimization function is also available.

Analysis of the integrated extrusion blow molding process
Analysis of the whole process of the extrusion blow molding of a gasoline tank
BLOWUP3DF performs the final stage in process analysis. Parison geometry predictions performed earlier by RHEOCALC or SUNDYXTRUD are the initial data for BLOWUP3DF's confined inflation analysis.
Analysis of the whole process of injection blow molding
BLOWUP3DF performs the final stage of the process analysis of injection blow molding (hot parison) and analyzes confined inflation, using the results of pre-form injection analyses by PLANETS.
Analysis of the whole process of the injection blow molding of a PET bottle
Thickness-driven optimization analysis
SIMBLOW's optimization analysis function computes the initial thickness profile of a parison needed to achieve the specified thickness profile of the final molded part.
Inverse analysis of the thickness of a PET bottle
Extensive element library
In addition to film elements, line elements, plane elements and solid elements are available. Multilayer blowing and parison matching portions can be modeled for detailed analysis.
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