Let's say I want to take such pins...
And place them in a similar holder, but thick pressed cardboard instead of plastic, then vacuum impregnate the whole thing with silicate glass.
The main idea is to make the same array of pins with high temperature resistance, a holder that won't move or melt. The base must be capable of withstanding 250 deg C for 10 seconds per each pin.
While there are PCB high temperature arrays with pressed lugs or turrets, I need a much cheaper alternative that will be glued on custom small bobbins.
Thanks!
And place them in a similar holder, but thick pressed cardboard instead of plastic, then vacuum impregnate the whole thing with silicate glass.
The main idea is to make the same array of pins with high temperature resistance, a holder that won't move or melt. The base must be capable of withstanding 250 deg C for 10 seconds per each pin.
While there are PCB high temperature arrays with pressed lugs or turrets, I need a much cheaper alternative that will be glued on custom small bobbins.
Thanks!
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Google "high temperature epoxy". That's gotta be easier to work with than molten glass. Cheap epoxy won't do, but high temp types can get really hot.
high temperature epoxy - Google Search
high temperature epoxy - Google Search
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Do you mean liquid glass (sodium silicate)?
It will withstand relatively high temperatures, but it won't be stable over time: it will react with the ambient CO2 and slowly disintegrate, unless it is stabilized in some way (there are methods and additives, but you will need to search the details for yourself, I have no expertise in this field).
If the assembly just needs to hold together the time required to arrive at the final state, it could be OK though
Note that there are some varieties of low-temperature curing refractory slurries, but there too you will need to research yourself.
If cardboard can withstand the temperature, high-temp epoxy could be suitable.
High-temp silicones are even better, but they are inherently flexible; however, if used to impregnate fiber-materials or with mineral filling loads, they can become relatively stiff
Yes, silicate liquid glass, exactly. The good news is, the manufactured device will be vacuum potted soon after, so it will be protected from CO2.
Well, I will try it first and let you guys know how it turned out. Thanks 🙂
Well, I will try it first and let you guys know how it turned out. Thanks 🙂
My laser cut cardboard holes turned out to be too tight, which actually resulted in a good thing. I pressed the pins into them with a vice and the assembly is already tight.
But I'll impregnate the cardboard with sodium silicate anyway and compare the strength of both versions.
But I'll impregnate the cardboard with sodium silicate anyway and compare the strength of both versions.