I have came up with a design in my head for a lever action hot bar press. You can buy a lever style press and modify it slightly to easily achieve a lot of downwards force. You can use a scale to calibrate what lb force any certain position of the lever.
But what I am trying to figure out is this - the ACF that I am debating buying is rated for 2 Mpa at ~200C for 20 secs. When converting Mpa to PSI I get around 290-300 PSI.
The head of the machine, the hot bar, will have a much smaller area than square inches. So my question is if you have a hot bar head that has an area of 3-4mm x 45mm, then how much force is actually needed? Wouldn't it be much less than 290 psi or 2 MPa?
The reason I ask is because 300 pounds of downwards force seems like it would be WAY to much pressure to exert on a pcb or an LCD. I would think that 40-50 actual pounds pressing down over such a small area would be more than plenty but I am not good at math when it comes to converting pressure over an area. It just seems that 290 lbs of force is WAY to much.
I have the plan for this hot bar manual press figured up in my head and can easily source a T tip soldering iron and magnifying glass to align and set the COF back in place, but I just am not sure if it actually takes THAT much pressure. 2 MPa spread over an area of 3mm x 45 mm, would that really require 290 lbs of force? That would be like 1 and a half people standing on that small of an area.
Any help would be appreciated and thanks
EDIT: hopefully I put this in the right section. Should I put it over in the TV trouble shooting area? I figured this was a "general electronics technical discussion" but I am not sure. I just want as many people as possible to see it in hopes I get some insight.
But what I am trying to figure out is this - the ACF that I am debating buying is rated for 2 Mpa at ~200C for 20 secs. When converting Mpa to PSI I get around 290-300 PSI.
The head of the machine, the hot bar, will have a much smaller area than square inches. So my question is if you have a hot bar head that has an area of 3-4mm x 45mm, then how much force is actually needed? Wouldn't it be much less than 290 psi or 2 MPa?
The reason I ask is because 300 pounds of downwards force seems like it would be WAY to much pressure to exert on a pcb or an LCD. I would think that 40-50 actual pounds pressing down over such a small area would be more than plenty but I am not good at math when it comes to converting pressure over an area. It just seems that 290 lbs of force is WAY to much.
I have the plan for this hot bar manual press figured up in my head and can easily source a T tip soldering iron and magnifying glass to align and set the COF back in place, but I just am not sure if it actually takes THAT much pressure. 2 MPa spread over an area of 3mm x 45 mm, would that really require 290 lbs of force? That would be like 1 and a half people standing on that small of an area.
Any help would be appreciated and thanks
EDIT: hopefully I put this in the right section. Should I put it over in the TV trouble shooting area? I figured this was a "general electronics technical discussion" but I am not sure. I just want as many people as possible to see it in hopes I get some insight.
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