Re: mold making for cases
Date: January 30, 2011 01:56PM
If youre working on quarter plate or smaller die impressions, a Kelsey printing press is VERY GOOD at getting even and heavy pressure. These are fairly cheap and come in a few sizes. While its rather easy just using a big rubber mallet to do the copper foil impressions, the paper/mucilage sandwich will take the even and strong pressure of the Kelsey press to get a good impression.
Id not be doing the mat and preserver all in one.
the best mats are the solid ones, preservers NEED to be first filled on the back with epoxy, or they will crush.
Pressure to make the mold, one C clamp in the middle will NOT work.It needs to be fully even all around. I made one one time by using a trolly jack and the frame of my Studebaker. I made a few heavy plywood blocks to even pressures, and then put the die/mold set between these block, put them on top of the trolly jack and used about a half ton of upward pressure. It worked well and was one of my best dies.
Pretty much to make case cover molds, for paper stamping, you will need to take apart the original case and seperate the top from the side rails, smooth the back and stick this onto the male die half. cover with saran wrap and press into the epoxy steel. after it is fully hardened, remove the original case part, apply more epoxy steel to the male half, and press well and evenly as mentioned above until the epoxy steel oozes out. when it is hardened, you can pop this apart and the die should be good to go.
I see no way of really doing this well without taking apart the case.
The brass mat or preserver, the original, is left epoxied (5 minute, not epoxy steel) to the male half of that die set, only the female part is epoxy steel.