ShiftsGood
28th August 2013, 02:30 PM
Hello group, I am not in the injection mold business but searching for answers on a hot topic in the sealing ring market. Many shops across the world are encountering problems arising from what appears to be a defective or worn injection mold and as an instructor for my industry, automatic transmissions, I am curious to get some questions answered. I have included a pic of a defective ring and welcome your questions or comments.
My searches have led me to a possibility of "flash" occurring at the "parting line" in a worn or aged mold. In what I am seeing though, this doesn't look like random etching form a worn mold, if that is even possible on a steel mold being injected with molten PEEK.
As you can see in the photo, it doesn't appear to be a simple flash, rather, almost like two mismatched mold meeting in the side wall of the ring were used together.
My searches have led me to a possibility of "flash" occurring at the "parting line" in a worn or aged mold. In what I am seeing though, this doesn't look like random etching form a worn mold, if that is even possible on a steel mold being injected with molten PEEK.
As you can see in the photo, it doesn't appear to be a simple flash, rather, almost like two mismatched mold meeting in the side wall of the ring were used together.