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  1. Cisnerjo1973

    Air Breather is collapsing on an envelope bag for Autoclave Cure

    Hello Everyone ! Once again here requesting for your valuable support as always, we are curing a Composite part on a Autoclave, the specification request a 60psi pressure and 350°F cure for 110 minutes, the part consist of 3 plies of carbon fiber prepreg, we are noticing the air breather is...
  2. Cisnerjo1973

    Composite soak time over exposed at 250°F

    Good morning Gentleman, I have a problem that I would like your support with if possible in order to place a good rationale justification to accept some parts that were oven cure for a longer period of time than what the specification request. Heres the situation we cured some parts on the...
  3. Cisnerjo1973

    Reason for Step Cure Cycle on Phenolic Prepregs

    Hello, I have a question why the phenolic prepregs get a different cure cycle than the epoxy ones. Customer request a dwell or stabilization step for 30 minutes for the phenolic prepreg at temperature of 175°F to 185°F. After those 30 minutes the temperature goes up again up to 260°F for 90...
  4. Cisnerjo1973

    Pulls Life Time for a Composite Layup Tool

    Hello ! I have a question for the experts, is there any amount of layup pulls (usage) for a composite laup tool to start getting weak or to present internal leaks? I heard years ago that usually a fiber glass layup tool can last between 60 up to 100 pulls, but also it depends the temperature...
  5. Cisnerjo1973

    Press Pad for Phenolic Sandwich Panel

    Hello, I would like to ask for suggestions on how to make a press pad or something similar that help me on the radius area of a part, this area is critical for next assebly of the part, this is located on the bag side of the part on the top edge of it, I made a fiber glass press pad using a...
  6. Cisnerjo1973

    Autoclave Bag Leak

    Hello partners, I have a topic that would like your expertise support. I work on a composites company on which we cure some of the parts using autoclave pressure, the process specification does not mentions anything about bag leak requirements, the only the specification calls for is a pressure...
  7. Cisnerjo1973

    What are the best options to make a Rout Tool (resins and cloth types)

    Hello, I will try to make a rout tool to trim some parts from production that are scribe line trimmed at the moment, I have a little knowledge about making tools. But not so sure what would be the best option for Resins and Cloth type to use for a rout tool, does any person on the forum can...

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