Hot Plate Idea!

Discussion in 'General Electronics Chat' started by R!f@@, Nov 21, 2012.

  1. R!f@@

    Thread Starter AAC Fanatic!

    Apr 2, 2009
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    See the attached pic,

    It took me Hrs to solder and desolder, and in the end the IC exploded, literally, with a "POP" :eek:, and landed else where, not my face, thank god.

    I was thinking about it and I came with a small hot plate idea since the TCON board is a single sided surface mount pcb.

    My hot plate will be around an inch each side. I can heat it up to 260°C with a temperature controller. It would make a whole easier to pick up and place the chip without blowing it up and flipping away the adjacent components, right ?

    I like to know how I can go about it. Say should I use nichrome wires
    enclosed in cement and glue metal inch square plate . sides can be eclosed in glass.

    Or, how about ceramic low value high power resistors bonded a bunch together and encapsulate it with cement or lead. Give it a controlled power to regulate heat at 260°C.

    I can just put the little cube under the pcb heat it up. The PCB will be on the plate. Not convection heating.

    Or any other ideas from u guys ?
     
  2. Markd77

    Senior Member

    Sep 7, 2009
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    How about making the cube from scrap PCB, maybe a cuboid that extends further below the board and put a temperature controlled iron in there. The air should heat to about the same temperature as the tip.
    Don't know how good the results would be, but won't take long to try.
     
  3. BillB3857

    Senior Member

    Feb 28, 2009
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    I would be concerned about localized expansion causing fractures of traces or via points. The high priced commercial units use a pre-heat of the entire board, then higher temp localized heat on the target component.
     
  4. t06afre

    AAC Fanatic!

    May 11, 2009
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    If the chip is a goner. You may cut it loose with a stanly knife. Use solder wick on the pins first
     
  5. R!f@@

    Thread Starter AAC Fanatic!

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    My first thought. Down the drain.


    Did not get u ?

    I use solder wick to clean the solder. As usual, u are confusing me. :confused:
     
  6. takao21203

    Distinguished Member

    Apr 28, 2012
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    I don't think this works for these chips.
    And I don't just "don't think". I tried it. It is absolutely impossible.

    If you don't mind the heat stress, put the PCB in a domestic baking oven.
    After some minutes, you can lift off the IC with a screwdriver.

    Most components will survive, except plastic parts, and electrolytic caps.

    I have used that to remove large 68ec020 chips.
    And I have also used it for reflow soldering.
     
  7. vortmax

    Member

    Oct 10, 2012
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    I wonder if a small, high temperature TEC would work. Same idea as the nichrome block but better control.
     
  8. tshuck

    Well-Known Member

    Oct 18, 2012
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  9. R!f@@

    Thread Starter AAC Fanatic!

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    I was wondering tht too. Would a tec survive 300°C.?
     
  10. R!f@@

    Thread Starter AAC Fanatic!

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  11. THE_RB

    AAC Fanatic!

    Feb 11, 2008
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    I've seen an iron used (clothes iron) turned upside down, the hotplate can be removed from all the plastic casing.
     
  12. timescope

    Member

    Dec 14, 2011
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    Try a 12v, 21 watt car brake light bulb under the board. If you need more heat, use a headlight bulb (about 55 watts).

    Timescope
     
  13. shortbus

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    Sep 30, 2009
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