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  • Users: Chr1s
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  1. Chr1s

    Paint and E-coat resistant coatings

    Teflon - We use it on weld studs in the body shop prior to E-coat and paint. Sometimes it also pays to add a nut with paint cutter threads.
  2. Chr1s

    Material for plastic EA with living hinge

    Is there a plastic out there that works well for a front fascia energy absorber, that can also handle a living hinge molded into it. It only needs to hinge a couple of times. Thanks,
  3. Chr1s

    Front End Module

    Where do vehicles that do not have a front crossmember get the structure to control the rails ? I know there are vehicles out there that get built with open architecture.
  4. Chr1s

    Front End Module

    Currently the rails are held to +/- 0.5mm using the current crossmember, once that is removed they spring up to 10mm. Ideally we'd like to removed the crossmember to be able to access the engine compartment. However the BIW is suppost to be carry over, with out a big re-design the structure is...
  5. Chr1s

    Front End Module

    Could anyone with front end module experience give some of the pro's and cons of it. Is there a way to get around having a million and one part numbers due to all the different options ? On vehicles with open frt architecture how did you control the rails. Many thanks,
  6. Chr1s

    Moulded-In Clips

    There are a million and 1 examples of moulded in snap fits out there.
  7. Chr1s

    Automotive exterior lighting requirements

    Anyone know any decent website decribing automotive exterior lighting requirements ? Cheers,
  8. Chr1s

    SUV plastic under body tray

    The failure mode is the million dollar question. We are only getting photos of parts after they have been ripped off the vehicle. If may be that the fasteners are failing. But we have seen hard contact before over a course that represents pot holes (when we get hard contact the part is acting...
  9. Chr1s

    SUV plastic under body tray

    We are using PP (3mm) right now and it is getting the sh1t beaten out of it. There is an all aero-cover version and a skid plate version which still recieves a short aero-cover. Both versions have to pass some serious off road durability testing, that results in some hard contact, although at...
  10. Chr1s

    SUV plastic under body tray

    What material would you suggest for a SUV plastic under body tray (aero-cover under the engine). It has to pass tough off road durability testing.
  11. Chr1s

    Mathematic criterial of CAD Class-A surfaces

    There is a differance between a CAD class A and a manufacturing class A. For example on a fascia the exterior surface is all class A (owned by the studio). But in production that same surface will be broken into Class A,B and C surfaces for the supplier and OEM quality. The reason being that a...
  12. Chr1s

    Sinks

    Does anyone have the real magic formula for designing for zero sinks in ABS. The rato normally talked about is 1/3 wall stock. But I have yet to see a part that uses this that will not show sink. I know other factors like packing out the mold come into it, but has anyone had good results with...
  13. Chr1s

    Modelling Auto parts

    A class A surface is anything that you the customer sees. i,e exterior panels and interior surfaces. A Class B surface is something that is not always visible i.e. the underside of a fascia that you would have to bend down to see. A Class C surface is the back side ofa part of a surface that...
  14. Chr1s

    Fastener stripping

    I have a screw that attaches a thin piece of sheet metal to a hydroform. Everything with this was fine until I needed to add a 3mm thick Nylon bracket in front of the thin piece of sheet metal. Now we have Nylon in front of sheet metal in front of hydro form. The fastener now strips...
  15. Chr1s

    different parts with same molding conditions

    Who cares if the process is the same or not ? The only thing you are aiming for is parts that are in spec. Therefore tweak the process until you get good parts, the customer will not care if it takes two different set ups, only that they get good parts.
  16. Chr1s

    vendor to plate large plastic parts

    You may have better luck going starting with their Tech center in Warren, Michigan. That is where the Sales reps & account managers are. 23751 Amber Street Warren, MI 48089 1-810-757-7800 1-810-757-8329 (fax)
  17. Chr1s

    vendor to plate large plastic parts

    Guardian Automotive - http://www.guardian.com They have a good plating plant in Evansville Indiana. They chrome alot of abs grille for the automotive industry, including the big truck grilles (freightliner). Chris
  18. Chr1s

    PROTECTING GALVANIZED SHEET METAL

    Aircraft wings have 100's of rivets on them and are a flat surface and obviously exposed to the elements.
  19. Chr1s

    10 years into the future ?

    Let me clarify. When I say alternative I am not talking internal combustion hybrid. I am talking Methanol fuel cells with zero emissions etc..
  20. Chr1s

    10 years into the future ?

    Don't you think that the first mass produced practical (in terms of speed / acceleration / mileage range etc..) alternative fuel vehicle would be a bigger break through than those mentioned ?

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