Claims
- 1. In a simulation system which predicts a behavior of a molten resin in a mold in filling, packing, and cooling processes by using a fundamental equation formulated by the finite element method, and shrinkage factors in a direction of thickness and planar directions based on anisotropy of a volume shrinkage factor obtained during prediction of the filling, packing, and cooling processes, a method of predicting a deformation amount in an injection-molded article, wherein a warp deformation is predicted by calculating the shrinkage factors in accordance with:
- .sub..epsilon. Z=A+B.multidot.eV [(1)]
- .sub..epsilon. P=(eV-.sub..epsilon. Z)/2 [(2)]
- wherein .sub..epsilon. Z is a shrinkage factor in the direction of thickness, .sub..epsilon. P is a shrinkage factor in the planar directions, eV is a volume shrinkage factor and A and B are shrinkage coefficients.
- 2. In a simulation system apparatus which predicts a behavior of a molten resin in a mold in filling, packing, and cooling processes by using a fundamental equation formulated by the finite element method, and shrinkage factors in a direction of thickness and planar directions based on anisotropy of a volume shrinkage factor obtained during prediction of the filling, packing, and cooling processes, an apparatus for predicting a deformation amount in an injection-molded article, comprising deformation analyzing means for predicting a deformation amount by calculating the shrinkage factors in accordance with:
- .sub..epsilon. Z=A+B.multidot.eV [(3)]
- .sub..epsilon. P=(eV-.sub..epsilon. Z)/2 [(4)]
- wherein .sub..epsilon. Z is a shrinkage factor in the direction of thickness, .sub..epsilon. P is a shrinkage factor in the planar directions, eV is a volume shrinkage factor, and A and B are shrinkage coefficients.
- 3. In a simulation system which predicts a behavior of a fiber-containing molten resin in a mold in filling, packing, and cooling processes by using a fundamental equation formulated by the finite element method, and shrinkage factors in a direction of thickness and planar directions based on anisotropy of a volume shrinkage factor obtained during prediction of the filling, packing, and cooling processes, a method of predicting a deformation amount in an injection-molded article wherein a warp deformation is predicted by calculating the shrinkage factors in accordance with: ##EQU1## wherein .sub..epsilon. Z is a shrinkage factor in the direction of thickness, .sub..epsilon. P is a shrinkage factor in the planar directions, eV is a volume shrinkage factor, and A and B are shrinkage coefficients, .sub..epsilon. L is a shrinkage factor in a flow direction in the planar directions, .sub..epsilon. T is a shrinkage factor in a direction perpendicular to the flow direction in the planar directions, .sub..alpha. L is a thermal expansion coefficient in the flow direction, and .sub..alpha. T is a thermal expansion coefficient in a direction perpendicular to the flow direction.
- 4. In a simulation system which predicts a behavior of a fiber-containing molten resin in a mold in filling, packing, and cooling processes by using a fundamental equation formulated by the finite element method and shrinkage factors in a direction of thickness and planar directions based on anisotropy of a volume shrinkage factor obtained during prediction of the filling, packing, and cooling processes, an apparatus for predicting a deformation amount in an injection-molded article wherein a warp deformation is predicted by calculating the shrinkage factors in accordance with: ##EQU2## wherein .sub..epsilon. Z is a shrinkage factor in the direction of thickness, .sub..epsilon. P is a shrinkage factor in the planar directions, eV is a volume shrinkage factor, and A and B are shrinkage coefficients, .sub..epsilon. L is a shrinkage factor in a flow direction in the planar directions, .sub..epsilon. T is a shrinkage factor in a direction perpendicular to the flow direction in the planar directions, .sub..alpha. L is a thermal expansion coefficient in the flow direction, and .sub..alpha. T is a thermal expansion coefficient in a direction perpendicular to the flow direction.
Priority Claims (1)
Number |
Date |
Country |
Kind |
5-330757 |
Dec 1993 |
JPX |
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Parent Case Info
This is a divisional of application Ser. No. 08/749,833 filed Nov. 15, 1996 now U.S. Pat. No. 5,811,133.
US Referenced Citations (11)
Divisions (1)
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Number |
Date |
Country |
Parent |
749833 |
Nov 1996 |
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