Injection molding of crosslinking polymers using strain data
US11040472B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | May 30, 2018 |
| Grant date | Jun 22, 2021 |
| Priority date | — |
| Expiry date | Feb 14, 2039 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB29K2105/24
- WIPO fieldOther special machines
- WIPO sectorMechanical engineering
Abstract
Non-time dependent calculated variables based on measured strain are used to effectively determine an optimal hold profile for an expanding crosslinking polymer part in a mold cavity. A system and/or approach may first inject molten expanding crosslinking polymer into a mold cavity, then measure strain at the mold cavity or at another location within the injection molding system, and then calculate at least one non-time dependent variable during an injection molding cycle. Next, the system and/or method commences a hold profile for the part, and upon completing the hold profile, the part is ejected from the mold cavity, whereupon a cure profile is commenced.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.