Molten injection-molding method
US5031108A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Nov 18, 1988 |
| Grant date | Jul 9, 1991 |
| Priority date | — |
| Expiry date | Nov 18, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29C45/7693
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
A molten injection-molding method is applicable to any system of dividing a molded product form model into micro-elements and analyzing a molten material flow behavior within the mold by the use of numerical analytic techniques that include the finite element method, boundary element method, difference method, and FAN method, among others. First, the entire length of time required for the process of filling the mold with a molten material is divided into an arbitrary number of intervals, representing the filling progress in each individual time interval in an equitime curve diagram. This is followed by setting a point that corresponds to any element, drawing from the point a normal line to its corresponding equitime curve, next setting a point of intersection between said normal line and an adjacent equitime curve, drawing another normal line to this equitime curve, and then repeating the series of steps with still other adjacent equitime curves further on, to generate and display a filling flow curve diagram from the points set in correspondence with said equitime curves and normal lines that connect the points together.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.