Injection Molding of Crosslinking Polymers
AssigneeImflux Inc.
InventorsRichard Lewis Montague, II, Rick Alan Pollard, Chow-Chi Huang, Gene Michael Altonen, Kimberly Nichole McConnell, Aaron Timothy Neate
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Abstract
Non-time dependent measured variables 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 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.
Claims22
A method for determining whether an expanding crosslinking polymer part is ready to be ejected from a mold cavity during an injection molding cycle, the method comprising:
- injecting molten expanding crosslinking polymer into a mold cavity;
- measuring at least one non-time dependent variable during the injection mold cycle;
- commencing a hold profile for the expanding crosslinking polymer part;
- and
- upon completing the hold profile, ejecting the part from the mold cavity.
An expanding crosslinking polymer injection molding system comprising:
- an injection molding machine comprising an injection unit and a mold forming a mold cavity, the injection unit adapted to receive and inject a molten expanding crosslinking plastic material into the mold cavity to form a molded part;
- a controller adapted to control operation of the injection molding machine;
- and
- one or more sensors coupled to the injection molding machine and the controller;
- wherein at least one of the one or more sensors is adapted to measure at least one non-time dependent variable during the injection mold cycle, wherein the controller is adapted to commence a hold profile for the expanding crosslinking polymer part and is further adapted to cause the molded part to be ejected from the mold cavity upon completing the hold profile.
Dependencies are inferred from the claim text.