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Hot surface Requiring Insulation

  • 01-08-2017 6:04pm
    #1
    aidanki
    Registered Users Posts: 1,279 ✭✭✭


    I have a glue nozzle which is 180C which I need to put some guarding or insulation around to stop people burning themselves if they touch it. You would burn yourself if you touch it today.

    If I make the guard from steel/Ali and position it 10mm offset from the glue nozzle will it still be roasting hot. I guess a perspex guard would probably melt.

    I cant use fiberglass insulation around it btw, ideally I would make the guard and coat the guard with something so it would not pick up any heat and then it would be perfect.

    All advice appreciated


Comments

  • #2
    Prenderb
    Registered Users, Registered Users 2 Posts: 1,560 ✭✭✭Prenderb


    Is the glue nozzle constantly discharging? What size is the nozzle and I would presume it is discharging downwards?


  • #3
    brianwalshcork
    Registered Users, Registered Users 2 Posts: 607 ✭✭✭brianwalshcork


    Bakelite? Not sure if it's suitable up to 180c


  • #4
    BASHIR
    Registered Users Posts: 553 ✭✭✭BASHIR


    PTFE? easy to buy in rod and bar form. Machinable, and good insulation properties. first data sheet I looked at says operating temp up to 260 degres C


  • #5
    2011
    Moderators, Home & Garden Moderators, Technology & Internet Moderators, Regional East Moderators Posts: 12,602 Mod ✭✭✭✭2011


    Silicone rubber. It is good for 300 degrees C:

    https://en.m.wikipedia.org/wiki/Silicone_rubber


  • #6
    Turbulent Bill
    Registered Users, Registered Users 2 Posts: 1,632 ✭✭✭Turbulent Bill


    aidanki wrote: »
    If I make the guard from steel/Ali and position it 10mm offset from the glue nozzle will it still be roasting hot. I guess a perspex guard would probably melt.

    Maybe concentric aluminium tubes (with air gaps between the tubes) around the nozzle would work better than a single guard. Cuts down most of the radiated heat to the external surface, and the air gaps act as insulators. If it still isn't cool enough, stuff the air gaps with a better insulator.


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