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Recent content by materialsliz

  1. materialsliz

    Phenolic oven cure

    Pull full vac (25 in Hg min). Load part in oven. Heat part to 340-370F at about 4F/min based on part TC's. Hold for 120 minutes min at cure temp. Cool at 8F/min max to under 150F. Full vac on the entire time. A key feature of the fab is on the top and bottom of the panels we place a layer...
  2. materialsliz

    Phenolic oven cure

    Compositepro, we do a variety. Some are honeycomb panels, others are solid laminates. They are interior panels so I'm sure there were flammability requirements that were proven out by our customer. All of them are build to print so we follow the customer's cure requirements. We haven't done...
  3. materialsliz

    Phenolic oven cure

    We cure phenolic glass prepreg in the oven under full vac (28 in Hg) during the entire cure, and also use bleeder and perforated release on the top and bottom of panels to draw away volatiles and resin. We don't use mechanical means to apply pressure, we use the vac. We haven't experienced any...
  4. materialsliz

    Fire resistant carbon

    Jim, Cytec makes a couple products. We use their Cycom 2290 phenolic resin with carbon fabric and glass fabric.
  5. materialsliz

    Honeycomb core machining

    We use a material called Corefix to stabilize honeycomb prior to machining. We bond it to one side of the core and machine the unbonded side. After machining we use a heat gun to gently heat the Corefix and it peels right off. Have had great success with it. I've heard of Aquapour but our...
  6. materialsliz

    Effect of gravity in autoclave cure

    I second the resin viscosity. There is a prepreg we use (customer specified) whose resin system runs like water during cure. We completely enclose the part on the mold with release film and seal it inside with tape. If it leaks we get porous parts.
  7. materialsliz

    Is the Grass Greener Elsewhere?

    You are being taken advantage of and your company has not lessened your workload because you've been doing the work. I too am a project engineer at a small company (we have 18 engineers) and I have needed to be QA, sales, a fabricator, and a machinist on the parts I'm responsible for, at...
  8. materialsliz

    MBA not useful in some fields

    Materials engineering is a "less popular" engineering field?! Tell that to all the recruiters who keep calling me looking for a materials/composite engineer. :P I would think an MBA and management knowledge would be useful no matter what engineering degree you have, but I second IRstuff in...
  9. materialsliz

    ASTM D562 viscosity test-need test lab

    Heh heh. Love your screen name BTW. MacGyver was my favorite show growing up. I have the DVD eps at home :)
  10. materialsliz

    ASTM D562 viscosity test-need test lab

    I didn't know the ASTM site had this. Thanks mcgyvr!
  11. materialsliz

    ASTM D562 viscosity test-need test lab

    Hi all, does anyone know of a test house in the U.S. that can perform a viscosity test on paint per ASTM D562? Online searches and phone calls to our current list of labs has not proven fruitful. Thanks!
  12. materialsliz

    How Relevant is Graduate School Experience for a Position in Industry?

    Consider working for IBM; they love PhD's (my fiancee works there). They don't just do research, there is much development as well.
  13. materialsliz

    Not really an engineer, but I want to be...

    I knew a couple of Biomechs when I was in college in the late 90s. It involved everything from designing and building prostheses to joint replacement options to ergonomic designs and analysis. It was a lot of mechanical combined with good doses of materials and bio knowledge.
  14. materialsliz

    Work Hard - New Job Advice

    I work with a couple people who are ski instructors on the weekends during the winter, some are landlords, some fix small machines, a few others help with a family business. All of them bring in extra cash and enjoy their weekends away from work.
  15. materialsliz

    questions about processing AFRPE4 prepreg

    Have you looked into a nickel teflon coating on your mold? It's considered a permanent mold release rather than a semi-perm that you say you are currently using.
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