Result

In the result, the simulation of the bottle from the Ansys blow molding (Polyflow) windows, the data will generate when the material properties which are the density and viscosity of material was define. Using the different parison paremeter will show the effect on the final wall thickness and stress contour on the part. Thickness and stress profiles in the bottle will be discussed. The physical property of polypropylene which is density, blow pressure, viscosity and gravity is constant. Using the constant time also which is 0.1 second of upper time limit and the time during the blow molding process will appear. The simulation result appears the result of blow molding which is using 8, 10, 18, and 20mm diameter of parison. The different diameter of parison will effect on the final wall thickness and stress profile thickness. This visualization of result will effect on the graft result based on the variable diameter of parison. Adopted material for blowing parison is polypropylene density ρ=0.906 g/cm³, diameter parison, d=8, 10, 18, and 20mm and the viscosity μ = 100000 Pa•s. Thickness and stress profiles in the bottle will be discussed

Parison thickness

8mm parison diameter

10mm parison diameter

18mm parison diameter

20mm parison diameter

Stress Contours Occurs

Figure 4.18 (a-d) presents the thickness distribution versus longitudinal coordinate at the end of the process. A zoom of the neck and the bottom of the bottle shows the stress distribution at the end of the process. In clear indicates that at the end of the process, the bottom of the bottle is submitted to high stresses. A pressure is the maximum pre-blowing pressure (low pressure) imposed during last steps with maximum blowing pressure (high pressure).